WO2024008194A1 - Bloc-batterie - Google Patents

Bloc-batterie Download PDF

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Publication number
WO2024008194A1
WO2024008194A1 PCT/CN2023/106614 CN2023106614W WO2024008194A1 WO 2024008194 A1 WO2024008194 A1 WO 2024008194A1 CN 2023106614 W CN2023106614 W CN 2023106614W WO 2024008194 A1 WO2024008194 A1 WO 2024008194A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
battery
circuit board
sampling circuit
pack according
Prior art date
Application number
PCT/CN2023/106614
Other languages
English (en)
Chinese (zh)
Inventor
任朝举
张国江
江吉兵
徐宇虹
Original Assignee
湖北亿纬动力有限公司
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 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Publication of WO2024008194A1 publication Critical patent/WO2024008194A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • 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 disclosure relates to the field of battery technology, and in particular, to a battery pack.
  • the sampling circuit board can reduce the use of the internal space of the battery pack, simplify the circuit, and improve the efficiency of the group.
  • the sampling circuit board is usually placed on the top of the battery core. Since the temperature at the top of the battery core is relatively high, the arrangement of the sampling circuit board will affect the heat dissipation ability of the battery core, resulting in poor heat dissipation effect of the battery, and the battery core is prone to malfunction. The risk of thermal runaway, leading to battery pack explosion or fire.
  • the present disclosure provides a battery pack that has a good heat dissipation effect, thereby effectively avoiding the occurrence of thermal runaway of the battery core due to excessive internal temperature of the battery pack.
  • the present application provides a battery pack, including a plurality of battery cells, a bus bar, and a sampling device; the bus bar is arranged on the top of the battery core and electrically connects several of the battery cells to form a battery cell group; the sampling device The device includes a sampling circuit board, which is arranged on the first side of the battery core group and is electrically connected to the busbar.
  • the busbar is arranged to electrically connect several cells to form a cell group, and the electrical connection between the sampling circuit board and the busbar can collect signals such as temperature and pressure of the cells in the cell group.
  • the sampling circuit board can be prevented from affecting the heat dissipation of the top of the battery cell and the bus bar, thereby effectively avoiding the occurrence of thermal runaway of the battery core caused by excessive internal temperature of the battery pack.
  • the sampling circuit board is disposed on the side of the battery pack, the space occupied in the height direction of the battery pack is reduced.
  • Figure 1 is a structural schematic diagram 1 of the partial structure of the battery pack provided by the present disclosure
  • Figure 2 is a schematic assembly diagram of the busbar and sampling circuit board provided by the present disclosure
  • Figure 3 is an enlarged view of the partial structure at A in Figure 1;
  • Figure 4 is a second structural schematic diagram of the partial structure of the battery pack provided by the present disclosure.
  • Battery core 100. Battery core group; 200. Bracket; 210. End plate; 211. Raised rib; 212. Glue hole; 220. First side plate; 221. Fixed part; 222. Support part; 230. Second side plate; 300, sampling circuit board; 310, second connection part; 400, bus bar; 410, first connection part; 420, positive connection part; 430, negative connection part; 440, base material; 500, connection 600, series row; 700, positive output row; 800, negative output row; 900, liquid cooling plate; 1000, nickel sheet.
  • first position and second position are two different positions, and the first feature “on”, “above” and “above” the second feature include the first feature on the second feature. Directly above and diagonally above, or simply means that the level of the first feature is higher than that of the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • connection should be understood in a broad sense.
  • connection or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • connection or integral connection
  • connection, or integral connection can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium
  • it can be an internal connection between two components.
  • specific meanings of the above terms in this disclosure can be understood on a case-by-case basis.
  • this embodiment provides a battery pack, including a battery cell 10, a bus bar 400 and a sampling device.
  • the bus bar 400 is disposed on the top of the battery cells 10 and electrically connects several battery cells 10 to form a battery core group.
  • the sampling device includes a sampling circuit board 300.
  • the sampling circuit board 300 is disposed on the first side of the battery pack and is electrically connected to the bus bar 400.
  • the bus bar 400 is arranged to electrically connect several cells 10 to form a cell group, and then the sampling circuit board 300 and the bus bar 400 are electrically connected. Therefore, the sampling device can collect the Signals such as temperature and pressure of the battery cells 10 in the battery pack.
  • the sampling circuit board 300 By arranging the sampling circuit board 300 on the side of the battery pack, the sampling circuit board 300 can be prevented from affecting the heat dissipation of the top of the battery cell 10 and the bus bar 400, thereby effectively avoiding the occurrence of thermal runaway of the battery cell 10 caused by excessive internal temperature of the battery pack. .
  • the sampling circuit board 300 is disposed on the side of the battery pack, the space occupied in the height direction of the battery pack is reduced.
  • the sampling circuit board 300 may be a flexible flat cable.
  • Flexible flat cable is a kind of flexible electronic component, also known as FFC. It is a new type of data made of PET (Polyethylene terephthalate) insulation material and extremely thin tinned flat copper wire, pressed through a high-tech automated equipment production line. Cables. It has the advantages of small size, high density, strong functions, low process difficulty, and can ensure stable quality. The number and spacing of wires can be freely selected to meet various connection needs.
  • each battery group is connected to a sampling circuit board 300 , and adjacent battery groups are connected in series through series rows 600 .
  • the positive electrode is provided with a positive output row 700
  • the negative electrode is provided with a negative output row 800.
  • the bus bar 400 uses a 0.3mm thin copper bar.
  • the series bus bar 600, the positive output bar 700 and the negative output bar 800 use variable cross-section copper bars, which are welded from 0.3mm and 2mm copper sheets. This can not only meet the overcurrent requirements. , and can save space.
  • each battery cell group includes a plurality of battery cells 10 arranged in a rectangular parallelepiped shape, and the first side refers to the side in the length direction of the battery cell group.
  • the sampling device also includes a connector 500 that electrically connects the sampling circuit board 300 and the battery management system.
  • the connector 500 can be electrically connected to the sampling circuit board 300 through plugging, laser welding or terminal crimping.
  • the connector 500 is provided on the second side of the battery pack, that is, the side in the width direction of the battery pack.
  • the connector 500 and the sampling circuit board 300 can be disposed on the same plane, and the specific layout can be set according to the structures of the connector 500 and the sampling circuit board 300 .
  • connection structure of the bus bar 400 and the sampling circuit board 300 See Figure 2 for the connection structure of the bus bar 400 and the sampling circuit board 300.
  • the bus bar 400 has a first connection part 410, and the first connection part 410 is connected to the nickel piece 1000.
  • the sampling circuit board 300 has a second connection part 310.
  • the second connecting part 310 is connected to the nickel piece 1000 through terminal crimping.
  • Terminal crimping is a common conductive connection method, and the terminal model can be selected according to the use needs. Using this connection method, the connection is convenient and reliable.
  • the connector 500 and the sampling circuit board 300 are connected via terminal crimps.
  • Terminal crimping is a commonly used electrical connection method in circuit connections and will not be described in detail here.
  • the connection between the bus bar 400 and the sampling circuit board 300 and the connection between the connector 500 and the sampling circuit board 300 may also be accomplished by other methods such as laser welding.
  • the battery pack also includes a bracket 200, and the sampling device is fixedly connected to the bracket 200.
  • the sampling circuit board 300 can be fixed to the bracket 200 through connecting components such as screws to prevent the sampling circuit board 300 from positional deviation.
  • the bracket 200 includes an end plate 210.
  • the end plate 210 is provided with a communication hole.
  • the bus bar 400 is provided on the end plate 210 and is electrically connected to the battery core 10 through the communication hole.
  • Each bus bar 400 includes a plurality of bus bar units.
  • the plurality of bus bar units are connected through a base material 440 .
  • the first connecting portion 410 is located at the end of the bus bar 400 .
  • Each busbar unit includes a positive electrode connecting portion 420 and a negative electrode connecting portion 430 that are connected to each other. That is, each busbar unit can connect two battery cells 10 in series.
  • the communication holes include a positive electrode communication hole and a negative electrode communication hole.
  • the positive electrode connection part 420 is electrically connected to the positive electrode of the battery core 10 through the positive electrode communication hole
  • the negative electrode connection part 430 is electrically connected to the negative electrode of the battery core 10 through the negative electrode communication hole.
  • busbar units are connected in a wavy shape through the base material 440, so that the cells 10 below the busbar 400 are disposed in a staggered manner to fully utilize the internal space of the battery pack and ensure that the battery pack has high energy. density.
  • the bracket 200 also includes a first side plate 220.
  • the first side plate 220 is connected to the end plate 210 and is arranged perpendicularly to the end plate 210.
  • the sampling circuit board 300 fits the first side plate 220. set up.
  • the outer contour of the end plate 210 of the bracket 200 is rectangular with long sides and short sides.
  • the first side plate 220 in this embodiment refers to a plate-like structure connected to the long sides of the end plate 210 .
  • the first side plate 220 and the end plate 210 are arranged vertically and extend toward the bottom of the battery pack. The arrangement of the first side plate 220 can limit the position of the sampling circuit board 300 to ensure its position on the side of the battery pack.
  • a support portion 222 can be provided on the lower edge of the first side plate 220 to limit the position of the sampling circuit board 300 .
  • the support portion 222 is a rectangular sheet structure extending toward the bottom of the battery core 10 , and its outer side is flush with the outer side of the first side plate 220 .
  • the shape of the supporting portion 222 can be set as needed.
  • the connector 500 can also be fixed on the second side plate 230 of the bracket 200 .
  • the second side plate 230 is a plate-like structure connected to the short side of the end plate 210 .
  • the connector 500 can be fixed to the second side plate 230 by bonding or snapping.
  • the battery pack also includes a detection element.
  • the detection element is arranged on the bracket 200 .
  • the detection element is electrically connected to the sampling circuit board 300 .
  • the detection element may be a temperature sensor or a pressure sensor or other components used for sampling the battery core 10 .
  • a fixing part 221 is provided on the side of the battery pack.
  • the fixing part 221 is connected to the first side plate 220 , and the detection element is fixed on the fixing part 221 .
  • the fixing portion 221 extends toward the bottom direction of the battery core 10 .
  • There are multiple fixing portions 221 and the plurality of fixing portions 221 are spaced apart along the long sides of the side plates.
  • the detection element in this embodiment is a dripper-type temperature sensor, which is connected to the sampling circuit board 300 using a terminal crimping method. Compared with the traditional welding connection, this connection method has higher reliability, simpler process, and economy. Better advantages.
  • the battery core temperature acquisition requirement is to reflect the battery core temperature in the highest temperature area in the entire battery core group. The design requirements are extremely high. According to the simulation results, the high temperature areas are located 1/3 of the way up from the bottom of the battery core 10.
  • the fixed part 221 is used to fix the dripper temperature sensor in a suitable position, which can ensure the accuracy of the collection position and also protect the dripper temperature sensor.
  • a liquid cooling plate 900 is provided on the end plate 210, and a liquid cooling channel is provided on the liquid cooling plate 900.
  • a liquid inlet and a liquid outlet are provided on the end surface of the liquid cooling plate 900, and the liquid cooling plate 900 is provided with a liquid inlet and a liquid outlet. The coolant flows through the liquid cooling channel and then flows out from the liquid outlet to achieve the cooling effect of the battery pack.
  • thermal conductive glue (not shown in the figure) is provided between the end plate 210 and the liquid cooling plate 900 .
  • Thermal conductive glue is laid on the surface of the bracket 200 and the bus bar 400.
  • the thermal conductive glue can bond the bracket 200 and the bus bar 400 to ensure that their positions do not move relative to each other, which increases the rigidity and stability of the structure; on the other hand, the thermal conductive glue can bond the bracket 200 and the bus bar 400.
  • the bus bar 400 locally heats up seriously.
  • the setting of the thermal conductive adhesive can transfer the heat of the bus bar 400 to the lower temperature part, preventing the local temperature inside the battery from being too high, causing thermal runaway of the battery core 10, etc. Security risks.
  • the bracket 200 is provided with a glue hole 212 , and the thermally conductive glue can contact the end surface of the battery core 10 through the glue hole 212 .
  • Thermal conductive glue can be filled in the glue holes 212 and directly contact the battery core 10, so that the heat transfer effect of the thermal conductive glue can be fully exerted, the heat of the battery core 10 can be quickly dispersed, and the thermal runaway phenomenon of the battery core 10 can be prevented.
  • the sampling circuit board 300 is arranged on the side of the battery core group, so that the thermal conductive glue can directly contact the top of the battery core 10. The heat of the battery core 10 and the bus 400 is directly transferred to the liquid cooling plate 900 through the thermal conductive glue without going through the sampling circuit. board 300, therefore, the battery pack has good heat dissipation effect and can effectively reduce the risk of thermal runaway caused by excessive temperature of the battery core 10.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un bloc-batterie. Le bloc-batterie comprend des éléments de batterie, une barre omnibus et un appareil d'échantillonnage. La barre omnibus est disposée au sommet des éléments de batterie, et connecte électriquement plusieurs éléments de batterie pour former un groupe d'éléments de batterie. L'appareil d'échantillonnage comprend une carte de circuit d'échantillonnage, la carte de circuit d'échantillonnage étant disposée sur une première face latérale du groupe d'éléments de batterie, et étant électriquement connectée à la barre omnibus.
PCT/CN2023/106614 2022-07-08 2023-07-10 Bloc-batterie WO2024008194A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202221759894.9 2022-07-08
CN202221759894.9U CN218039677U (zh) 2022-07-08 2022-07-08 一种具有采样装置的电池包

Publications (1)

Publication Number Publication Date
WO2024008194A1 true WO2024008194A1 (fr) 2024-01-11

Family

ID=84381095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/106614 WO2024008194A1 (fr) 2022-07-08 2023-07-10 Bloc-batterie

Country Status (2)

Country Link
CN (1) CN218039677U (fr)
WO (1) WO2024008194A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN218039677U (zh) * 2022-07-08 2022-12-13 湖北亿纬动力有限公司 一种具有采样装置的电池包

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206312964U (zh) * 2016-11-16 2017-07-07 深圳市沃特玛电池有限公司 一种电池模组
CN211740441U (zh) * 2020-04-30 2020-10-23 中航锂电（洛阳）有限公司 电池温度采集装置及具有其的电池模组
CN215644871U (zh) * 2021-08-20 2022-01-25 台湾立讯精密有限公司 电池模组
CN215911500U (zh) * 2021-09-28 2022-02-25 蜂巢能源科技有限公司 电池模组和电池包
CN216161891U (zh) * 2021-09-13 2022-04-01 恒大新能源技术(深圳)有限公司 一种电池支架组件、电池模组和电池包
WO2022088320A1 (fr) * 2020-10-27 2022-05-05 远景动力技术(江苏)有限公司 Module de batterie, bloc-batterie et procédé de détection d'emballement thermique de batterie associé
CN216793932U (zh) * 2022-02-25 2022-06-21 重庆金康动力新能源有限公司 一种busbar组件及电池模组
CN216903249U (zh) * 2022-03-15 2022-07-05 华鼎国联动力电池有限公司 一种具有低压采集装置的动力电池模组
CN115172996A (zh) * 2022-07-08 2022-10-11 湖北亿纬动力有限公司 一种具有ccs组件的电池包
CN218039677U (zh) * 2022-07-08 2022-12-13 湖北亿纬动力有限公司 一种具有采样装置的电池包

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206312964U (zh) * 2016-11-16 2017-07-07 深圳市沃特玛电池有限公司 一种电池模组
CN211740441U (zh) * 2020-04-30 2020-10-23 中航锂电（洛阳）有限公司 电池温度采集装置及具有其的电池模组
WO2022088320A1 (fr) * 2020-10-27 2022-05-05 远景动力技术(江苏)有限公司 Module de batterie, bloc-batterie et procédé de détection d'emballement thermique de batterie associé
CN215644871U (zh) * 2021-08-20 2022-01-25 台湾立讯精密有限公司 电池模组
CN216161891U (zh) * 2021-09-13 2022-04-01 恒大新能源技术(深圳)有限公司 一种电池支架组件、电池模组和电池包
CN215911500U (zh) * 2021-09-28 2022-02-25 蜂巢能源科技有限公司 电池模组和电池包
CN216793932U (zh) * 2022-02-25 2022-06-21 重庆金康动力新能源有限公司 一种busbar组件及电池模组
CN216903249U (zh) * 2022-03-15 2022-07-05 华鼎国联动力电池有限公司 一种具有低压采集装置的动力电池模组
CN115172996A (zh) * 2022-07-08 2022-10-11 湖北亿纬动力有限公司 一种具有ccs组件的电池包
CN218039677U (zh) * 2022-07-08 2022-12-13 湖北亿纬动力有限公司 一种具有采样装置的电池包

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