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WO2018107436A1 - Ensemble capuchon supérieur de batterie et batterie secondaire - Google Patents

Ensemble capuchon supérieur de batterie et batterie secondaire Download PDF

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Publication number
WO2018107436A1
WO2018107436A1 PCT/CN2016/110117 CN2016110117W WO2018107436A1 WO 2018107436 A1 WO2018107436 A1 WO 2018107436A1 CN 2016110117 W CN2016110117 W CN 2016110117W WO 2018107436 A1 WO2018107436 A1 WO 2018107436A1
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WO
WIPO (PCT)
Prior art keywords
pole
assembly
voltage sensing
voltage
battery
Prior art date
Application number
PCT/CN2016/110117
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English (en)
Chinese (zh)
Inventor
朱凌波
李全坤
郑志民
迟庆魁
史平
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2016/110117 priority Critical patent/WO2018107436A1/fr
Publication of WO2018107436A1 publication Critical patent/WO2018107436A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of battery structures, and in particular, to a battery top cover assembly and a secondary battery.
  • Secondary batteries have been widely used due to their ability to be repeatedly charged and discharged, and the problem of overcharging is a serious problem that secondary batteries need to face during use, especially for EV hard-shell batteries. The adverse effects are even more pronounced.
  • a commonly used solution in the related art is to cut off the main circuit of the battery before the failure of the battery, thereby preventing the battery from continuing to be charged to ensure battery safety.
  • the secondary battery also generates a certain amount of gas during normal use, and as the use time increases, more and more gas is generated in the secondary battery, which causes the secondary battery to be in normal use. It is also possible that the circuit cut-off structure is triggered. Obviously, this situation will seriously affect the normal use of the secondary battery.
  • the present application provides a battery top cover assembly and a secondary battery to solve the above drawbacks.
  • a first aspect of the present application provides a battery cap assembly including a first pole assembly, a second pole assembly, a top cover sheet, and a voltage sensing member having unidirectional conductivity, the second pole assembly Electrically connected to the top cover sheet, the voltage sensing component is located between the first pole assembly and the top cover sheet,
  • the first pole assembly and the top cover sheet apply a reverse voltage to the voltage sensing component, and when the voltage of the battery exceeds a reference voltage, the voltage sensing component is reversely broken.
  • the first pole assembly is a negative pole assembly
  • the second pole assembly is positive a pole post assembly
  • the voltage sensing component is a diode
  • the voltage sensing component is a transient suppression diode.
  • the voltage sensing component is a silicon diode.
  • the battery has a reference voltage of 4.5V.
  • the first pole assembly includes a first pole body and a first terminal plate, the first pole body passes through the top cover sheet, the first terminal plate and the first pole The body is connected and located above the top cover sheet, and the voltage sensing component is located between the first terminal board and the top cover sheet.
  • a second aspect of the present application provides a secondary battery comprising a battery core and the battery top cover assembly of any of the above, the battery core comprising a first pole piece, a second pole piece, and the a separator between the pole piece and the second pole piece, the first pole piece is electrically connected to the first pole piece assembly, and the second pole piece is electrically connected to the second pole piece assembly;
  • the voltage sensing component When the voltage of the secondary battery exceeds the reference voltage, the voltage sensing component is reversely broken down, forming through the second pole piece, the second pole piece assembly, the top cover piece, and the voltage sensing Electrical connection paths of the component, the first pole assembly, and the first pole piece.
  • the method further includes a fuse portion electrically connected to the charge and discharge circuit formed between the first pole assembly, the second pole assembly, and the battery core.
  • the fuse portion is a sheet-like structure, the fuse portion is connected in series between the first pole assembly and the first pole piece, and/or the fuse portion is connected in series to the second pole Between the column assembly and the second pole piece.
  • the voltage sensing component is a sheet-like structure
  • the voltage sensing component has a through hole
  • the fuse portion includes a connected cell connection portion and a pole connection portion, and one end of the pole connection portion is worn. Passing through the through hole and electrically connecting to the first pole assembly.
  • the fuse portion is a columnar structure
  • the first pole assembly is fixedly and electrically connected to the fuse portion
  • the cross-sectional dimension of the first pole assembly is larger than a cross-sectional dimension of the fuse portion
  • the first pole assembly includes a first body segment and a second body segment, the fuse portion being connected in series between the first body segment and the second body segment, the first body segment Both the cross-sectional dimension and the cross-sectional dimension of the second body segment are greater than the cross-sectional dimension of the fuse portion.
  • the first body segment, the second body segment and the fuse portion are integrated Structure.
  • the outer peripheral surface of the fuse portion has an annular concave surface with respect to the first pole assembly in a circumferential direction of the first pole assembly.
  • the cross-sectional shape of the annular recessed surface is a circular arc shape in a section obtained along the axial direction of the fuse portion.
  • the voltage sensing components are plural, and each of the voltage sensing components is arranged along a surface where the top cover sheets are located.
  • the voltage sensing components are disposed in two, respectively a first sensing component and a second sensing component, and in the radial direction of the first pole component, the first sensing component and the second sensing component They are respectively disposed on opposite sides of the first pole assembly.
  • the voltage sensing component is a sheet structure or a columnar structure.
  • the battery top cover assembly provided by the present application is provided with a voltage sensing component.
  • a voltage sensing component When the battery has an overcharge problem, the potential difference between the positive electrode and the negative electrode is increased, and the voltage is induced by the first pole assembly and the top cover plate under normal working conditions.
  • the component applies a reverse voltage, so current cannot flow from the positive electrode to the negative electrode.
  • the reverse voltage applied to the voltage sensing component ie, the potential difference between the positive and negative electrodes
  • exceeds the reference voltage the voltage sensing component is reversed.
  • current can flow from the positive electrode to the negative electrode to form an external short circuit, thereby improving the safety performance of the battery.
  • the trigger condition of the voltage sensing component in the battery cap assembly is voltage, and the voltage on the voltage sensing component only changes sharply when the battery is overcharged, so even if the battery usage time increases, the voltage sensing component It is also not easy to trigger when there is no overcharge problem, so as to better ensure the normal use of the battery.
  • FIG. 1 is an exploded view of a battery top cover assembly according to an embodiment of the present application
  • FIG. 2 is a cross-sectional view of a secondary battery provided by an embodiment of the present application.
  • Figure 3 is a cross-sectional view of the battery top cover assembly of Figure 1;
  • Figure 4 is an enlarged view of a portion A of Figure 3;
  • FIG. 5 is an exploded view of another battery top cover assembly according to an embodiment of the present application.
  • Figure 6 is a cross-sectional view of the battery top cover assembly of Figure 5;
  • Figure 7 is an enlarged view of a portion B of Figure 6;
  • FIG. 8 is an exploded view of still another battery top cover assembly according to an embodiment of the present application.
  • Figure 9 is a cross-sectional view showing a secondary battery to which the battery top cover assembly shown in Figure 8 is applied;
  • Figure 10 is a cross-sectional view of the battery top cover assembly of Figure 8.
  • Figure 11 is an enlarged view of a portion C of Figure 10;
  • FIG. 12 is an exploded view of still another battery top cover assembly according to an embodiment of the present application.
  • Figure 13 is a cross-sectional view of the battery top cover assembly of Figure 12;
  • Figure 14 is a cross-sectional view taken along line D-D of Figure 13;
  • FIG. 15 is a schematic diagram of a mounting direction of a voltage sensing component in a battery top cover assembly according to an embodiment of the present application.
  • the present application relates to a secondary battery having a structure as shown in FIGS. 2 and 9, which may include a battery cell 10, a housing 11, and a battery top cover assembly.
  • the battery top cover assembly may include a first pole assembly 20, a second pole assembly 21, a top cover sheet 22, a first insulating member 25, a second insulating member 26, a third insulating member 27, a first sealing member 28, The second seal 29 and the voltage sensing member 30.
  • the housing 11 can be an aluminum casing, and the cover sheet 22 and the housing 11 are closed to form a receiving cavity in which the battery core 10 is housed.
  • the battery cell 10 includes a first pole piece, a second pole piece, and a separator between the first pole piece and the second pole piece.
  • the first pole piece may be a positive electrode piece or a negative electrode piece; accordingly, the second pole piece may be a negative electrode piece or a positive electrode piece.
  • the first pole assembly 20 and the second pole assembly 21 are mounted on the top cover sheet 22, and the first pole assembly 20 can be a positive pole, and correspondingly, the second pole assembly 21 is a negative pole, or a first pole
  • the assembly 20 is a negative electrode column, and correspondingly, the second pole assembly 21 is a positive electrode column.
  • the positive electrode column is electrically connected to the positive electrode tab of the battery cell 10, and the negative electrode column is electrically connected to the negative electrode tab of the battery cell 10.
  • the first pole assembly 20 is insulatively connected to the second insulating member 26, and the second insulating member 26 is insulatively connected to the lower portion of the top cover sheet 22.
  • the first sealing member 28 is disposed on the first pole assembly 20 and the second insulating member 26. between.
  • the second pole assembly 21 is insulatively connected to the third insulating member 27, the third insulating member 27 is insulatively connected to the lower surface of the top cover sheet 22, and the second sealing member 29 is disposed on the second pole assembly 21 and the third insulating member 27. between.
  • the voltage sensing component 30 has unidirectional conductivity between the first pole assembly 20 and the top cover sheet 22.
  • the first pole assembly 20 and the top cover sheet 22 apply a reverse voltage to the voltage sensing component 30, and the voltage sensing component 30 can sense the voltage difference between the first pole assembly 20 and the top cover sheet 22.
  • the voltage sensing part 30 may employ a diode or other structure as long as it has a function of inducing a voltage and has unidirectional conductivity itself.
  • the first pole assembly 20 is a cathode pole assembly
  • the second pole assembly 21 is a positive pole assembly
  • the voltage sensing component 30 is a diode. As shown in FIG.
  • the first pole assembly 20 And the top cover sheet 22 applies a reverse voltage to the voltage sensing component 30, so in the normal operating state, the resistance of the positive to negative electrode of the voltage sensing component 30 is a large resistance value (corresponding to insulation), and the resistance value of the negative electrode to the positive electrode It is a small resistance value, so current cannot flow from the positive electrode to the negative electrode.
  • the voltage sensing unit 30 is a diode
  • a transient suppression diode that is, a TVS (Transient Voltage Suppressor) diode can be further used. This diode has an extremely fast response time (sub-nanoseconds) and a relatively high surge absorption capability.
  • the impedance between the two ends can be extremely high. From high impedance to low impedance to absorb a large instantaneous current, clamping its own voltage across a predetermined value to protect other circuit components from transient high voltage spikes. Moreover, the TVS diode has a higher current conducting capability, thereby forming an external short circuit faster and preventing the battery from overcharging.
  • the voltage sensing component 30 can preferably be a silicon diode because the silicon diode has a smaller on-voltage than the diode of other materials, so that the overcharge phenomenon can be fed back more quickly, and silicon is additionally provided.
  • the diode When the diode is turned on, it has a larger current increase rate, and an external short circuit can be formed more quickly. Therefore, diodes of this material can better achieve overcharge protection of the battery.
  • the voltage sensing component 30 In the normal operating state, since the voltage sensing component 30 has unidirectional conductivity, it is located between the first pole assembly 20 and the top cover sheet 22, and the first pole assembly 20 and the top cover sheet 22 apply to the voltage sensing component 30.
  • the reverse voltage so the current cannot flow from the positive electrode to the negative electrode; when the voltage of the battery exceeds the reference voltage, that is, when the battery is overcharged, the potential difference between the positive electrode and the negative electrode increases, since the voltage sensing member 30 is disposed on the top cover sheet 22
  • the first pole assembly 20 and the first pole assembly 20 and the top cover 22 apply a reverse voltage to the voltage sensing component 30 when applied to the reverse voltage on the voltage sensing component 30 (ie, the positive and negative electrodes)
  • the voltage sensing member 30 When the potential difference between the two exceeds the reference voltage, the voltage sensing member 30 is reversely broken, and the voltage sensing member 30 at this time loses unidirectional conductivity, and at this time, current can flow from the positive electrode to the negative electrode.
  • the voltage sensing component 30 is a diode: the diode is forward-conducting, and when a reverse voltage is applied across the diode, the electron cannot pass through the diode, so that the diode is equivalent to an open circuit, but the open circuit depends on When the diode is reversed. If the voltage across the diode (ie, the reverse voltage) is large enough, the diode is reversed in reverse. The diode loses unidirectional conductivity during reverse breakdown, and the electrons pass through the diode, making the diode equivalent to the conductor. If diode If there is no overheating due to electrical breakdown, the unidirectional conductivity will not be permanently destroyed. After the voltage is removed, the performance can still be restored. Therefore, the overcharged battery can be used as long as the voltage is lowered.
  • the trigger condition of the voltage sensing component 30 in the above battery cap assembly is a voltage
  • the voltage on the voltage sensing component 30 usually only changes abruptly when the battery is overcharged, so even if the battery usage time is continuously increased,
  • the voltage sensing component 30 is also not easy to trigger when there is no overcharge problem, thereby better ensuring the normal use of the battery.
  • the specific magnitude of the trigger voltage of the voltage sensing component 30 can be flexibly selected according to factors such as battery specifications and safety requirements.
  • the aforementioned reference voltage may be 4.5V.
  • the insulation resistance of the voltage sensing component 30 from the positive electrode to the negative electrode may be greater than 1 Mohm. After the voltage sensing component 30 is reversely broken down, the voltage sensing component 30 is from the positive electrode to the negative electrode.
  • the resistance can be 0.1 to 3 mohm.
  • the first pole assembly 20 can include a first pole body 200 and a first terminal block 201.
  • the first pole body 200 passes through the top cover sheet.
  • the first terminal block 201 is connected to the first pole body 200 and above the top cover sheet 22, and the voltage sensing member 30 is located between the first terminal block 201 and the top cover sheet 22.
  • the second pole assembly 21 can include a second pole body 210 and a second terminal plate 211, the second pole body 210 passes through the top cover sheet 22, and the second terminal plate 211 and the second pole body 210 Connected and located above the top cover sheet 22.
  • Such an embodiment can better achieve the connection between the first pole assembly 20 and the second pole assembly 21 and the cover sheet 22.
  • the embodiment of the present application further provides a secondary battery including the battery core 10 and the battery top cover assembly described in any of the above embodiments, the battery core 10 includes a first pole piece, a second pole piece, and a separator between the first pole piece and the second pole piece, the first pole piece is electrically connected to the first pole piece assembly 20, and the second pole piece is electrically connected to the second pole piece assembly 21;
  • the voltage sensing component 30 When the voltage of the secondary battery exceeds the reference voltage, the voltage sensing component 30 is broken down to form a second pole piece, a second pole assembly 21, a top cover sheet 22, a voltage sensing component 30, and a first pole assembly 20 in sequence. And the electrical connection path of the first pole piece, thereby improving the safety performance of the battery.
  • the voltage sensing component 30 provided by the embodiment of the present application may adopt a sheet structure, a columnar structure, or the like.
  • the space occupied by the voltage sensing member 30 in the height space of the battery is small; when the columnar structure is employed, the overall size of the voltage sensing member 30 can be controlled to be relatively small.
  • the voltage sense can be flexibly selected according to the actual situation. The size of the parameters such as the shape and size of the component 30 should be used.
  • the voltage sensing component 30 can be set to one (as shown in Figures 5-7), two or more.
  • the voltage sensing components 30 may be arranged along the surface where the top cover sheet 22 is located, thereby increasing the voltage sensing component 30 and the first pole assembly 20 (or the second pole) The reliability of the assembly 21) after contact with the top cover sheet 22.
  • the voltage sensing component 30 can be disposed in two, respectively, the first sensing component 30a and the second sensing component 30b shown in FIGS. 1-4.
  • the first sensing member 30a and the second sensing member 30b may be respectively disposed on opposite sides of the first pole assembly 20.
  • Such an arrangement can not only improve the reliability of the voltage sensing component 30 after contact with the first pole assembly 20 (or the second pole assembly 21) and the top cover sheet 22, but also enable the voltage sensing components 30 and the first pole.
  • the force between the column assembly 20 (or the second pole assembly 21) and the top cover sheet 22 is more evenly balanced.
  • the battery top cover assembly provided by the present application can alleviate the overcharge problem of the battery, when the voltage sensing member 30 is broken down, it is still impossible to reliably ensure that the battery 10 does not continue to be charged. Therefore, in order to more thoroughly prevent the battery from overcharging, the battery may further include a fuse portion 31 electrically connected to the charge formed between the first pole assembly 20, the second pole assembly 21 and the battery cell 10. On the discharge circuit.
  • the charge and discharge circuit here refers to a circuit formed when the battery is normally charged and discharged.
  • the structure of the fuse portion 31 can be flexibly set.
  • the fuse portion 31 can adopt a sheet-like structure to facilitate the fuse portion 31 to be blown more quickly.
  • the present application provides the following three ways.
  • the fuse portion 31 can also adopt other structures.
  • the fuse portion 31 adopts a sheet structure, and the fuse portion 31 may be connected in series between the first pole assembly 20 and the first pole piece, or may be connected in series between the second pole assembly 21 and the second pole piece. Alternatively, the fuse portion 31 is connected in series between the first pole assembly 20 and the first pole piece, and between the second pole assembly 21 and the second pole piece. As shown in FIG. 2, the fuse portion 31 is connected in series between the second pole assembly 21 and the second pole piece, that is, one side of the fuse portion 31 is directly fixed and electrically connected to the second pole assembly 21. The other side is directly fixed and electrically connected to the battery cell 10, and the first pole assembly 20 is electrically connected to the battery cell 10 through the first adapter piece 32.
  • the fuse portion 31 can still adopt a sheet-like structure, and the voltage sensing member 30 can also adopt a sheet-like structure.
  • the first pole assembly 20 under such a structure can include only the first terminal. Board 201.
  • a through hole may be formed in the voltage sensing component 30.
  • the fuse portion 31 may include a connected cell connection portion and a pole connection portion. One end of the pole connection portion passes through the through hole and is electrically connected to the first terminal block 201.
  • the cell connection portion can adopt a relatively large connecting piece to ensure a sufficient contact area between the fuse portion 31 and the cell 10; and the pole connecting portion can adopt a connecting piece having a relatively small area to The size of the through hole is minimized to ensure the resistance value of the voltage sensing member 30 from the positive electrode to the negative electrode while controlling the size of the voltage sensing member 30.
  • the fuse portion 31 may have a columnar structure.
  • the first pole assembly 20 is electrically connected to the battery core 10 through the first adapter piece 32
  • the second pole assembly 21 is electrically connected to the battery core 10 through the second adapter piece 33.
  • the first pole assembly 20 can be fixed and electrically connected to the fuse portion 31.
  • the axis of the first pole assembly 20 can be parallel to the axis of the fuse portion 31.
  • the cross-sectional dimension of the first pole assembly 20 may be larger than the cross-sectional size of the fuse portion 31.
  • the columnar fuse portion 31 may be disposed at one end of the first pole assembly 20, and in another structure, as shown in FIG. 11, the first pole assembly 20 (when the first pole assembly 20 includes the first pole In the case of the body 200 and the first terminal block 201, specifically, the first pole body 200) may include a first body segment 202 and a second body segment 203, and the fuse portion 31 is connected in series to the first body segment 202 and the second body segment 203. In other words, that is, the fuse portion 31 is electrically connected between the first body segment 202 and the second body segment 203.
  • the cross-sectional dimension of the first body segment 200 and the cross-sectional dimension of the second body segment 203 are both larger than the cross-sectional dimension of the fuse portion 31 to effect fusing of the fuse portion 31.
  • the first body segment 202, the second body segment 203, and the fuse portion 31 may be of a unitary structure to improve the structural strength and reliability of the secondary battery.
  • the cross-sectional dimension of the first pole assembly 20 is designed to be larger than the cross-sectional dimension of the fuse portion 31, one side of the columnar fuse portion 31 may be aligned with the side of the first pole assembly 20, and even the first pole may be exceeded.
  • the side of the column assembly 20, but both structures will make the first pole set
  • the structure composed of the member 20 and the fuse portion 31 has a relatively serious irregularity, resulting in a high processing cost of the battery top cover assembly.
  • the outer peripheral surface of the fuse portion 31 can be disposed such that the outer peripheral surface of the fuse portion 31 is annularly recessed with respect to the first pole assembly 20 in the circumferential direction of the first pole assembly 20. With such a structure, the structure of the fuse portion 31 is more regular, thereby facilitating the processing of the entire battery top cover assembly.
  • the annular recessed surface may be a cylindrical surface, a prism surface or the like. However, if the interface shape of the annular concave surface is linear in the section obtained along the axial direction of the fuse portion 31, the fuse portion 31 and the first pole assembly The connection between the 20 will be more abrupt, resulting in a break between the two due to external forces. To this end, the shape of the annular recessed surface along the aforementioned direction may be set to a circular arc shape, so that the fuse portion 31 may be in a circular arc transition connection with the first pole assembly 20. When the first pole assembly 20 includes the first body segment 202 and the second body segment 203, the fuse portion 31 can be simultaneously arcuately coupled with the first body segment 202 and the second body segment 203.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne un ensemble capuchon supérieur de batterie et une batterie secondaire. L'ensemble capuchon supérieur de batterie comprend un premier ensemble pôle(20), un second ensemble pôle (21), un élément de capuchon supérieur (22), et un composant de détection de tension (30) ayant une conductivité unilatérale. Le second ensemble pôle est électriquement connecté à l'élément de capuchon supérieur, et le composant de détection de tension est situé entre le premier ensemble pôle et l'élément de capuchon supérieur. Dans un état de fonctionnement normal, le premier ensemble pôle et l'élément de capuchon supérieur appliquent une tension inverse au composant de détection de tension, et lorsqu'une tension d'une batterie dépasse une tension de référence, le composant de détection de tension subit une coupure inverse. Une condition de déclenchement du composant de détection de tension est une tension, et la tension sur le composant de détection de tension subit un changement rapide uniquement lorsque la batterie est surchargée. Par conséquent, même si le temps de service de la batterie augmente, le composant de détection de tension ne sera pas facilement déclenché de sorte qu'une surcharge ne se produise pas, de telle sorte qu'une utilisation normale de la batterie est assurée.
PCT/CN2016/110117 2016-12-15 2016-12-15 Ensemble capuchon supérieur de batterie et batterie secondaire WO2018107436A1 (fr)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN111490191A (zh) * 2019-01-26 2020-08-04 比亚迪股份有限公司 电池单元、电池模组及汽车
CN111785905A (zh) * 2020-07-30 2020-10-16 厦门海辰新能源科技有限公司 一种连接片、顶盖组件以及电池
WO2024131017A1 (fr) * 2022-12-19 2024-06-27 比亚迪股份有限公司 Pôle composite, ensemble plaque d'extrémité, et batterie

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CN2264419Y (zh) * 1996-08-01 1997-10-08 杨丕栋 带有自身保护功能的硅铅蓄电池
JP2004150320A (ja) * 2002-10-29 2004-05-27 Keio-Dentetsu-Bus Co Ltd バッテリー電圧低下警報ブザー装置
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CN111490191A (zh) * 2019-01-26 2020-08-04 比亚迪股份有限公司 电池单元、电池模组及汽车
US11824213B2 (en) 2019-01-26 2023-11-21 Byd Company Limited Battery unit, battery module and vehicle
CN111785905A (zh) * 2020-07-30 2020-10-16 厦门海辰新能源科技有限公司 一种连接片、顶盖组件以及电池
CN111785905B (zh) * 2020-07-30 2024-01-30 厦门海辰储能科技股份有限公司 一种连接片、顶盖组件以及电池
WO2024131017A1 (fr) * 2022-12-19 2024-06-27 比亚迪股份有限公司 Pôle composite, ensemble plaque d'extrémité, et batterie

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