WO2023169406A1 - 电池模组、电池包和车辆 - Google Patents

电池模组、电池包和车辆 Download PDF

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Publication number
WO2023169406A1
WO2023169406A1 PCT/CN2023/080041 CN2023080041W WO2023169406A1 WO 2023169406 A1 WO2023169406 A1 WO 2023169406A1 CN 2023080041 W CN2023080041 W CN 2023080041W WO 2023169406 A1 WO2023169406 A1 WO 2023169406A1
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WO
WIPO (PCT)
Prior art keywords
sampling
battery
battery module
battery core
housing
Prior art date
Application number
PCT/CN2023/080041
Other languages
English (en)
French (fr)
Inventor
陆文浩
聂成明
熊中华
谭晶
Original Assignee
比亚迪股份有限公司
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 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Publication of WO2023169406A1 publication Critical patent/WO2023169406A1/zh

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Classifications

    • 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
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M50/543—Terminals
    • 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

  • This application relates to the technical field of battery structures. Specifically, this application relates to a battery module, a battery pack and a vehicle.
  • lithium-ion batteries have the advantages of high operating voltage, high specific energy, long cycle life, and no environmental pollution. They are not only widely used in mobile communication equipment and portable electronic equipment, but also widely used in electric vehicles, electric bicycles, and Large and medium-sized electric equipment such as power tools is currently the main development direction of major battery manufacturers.
  • Lithium-ion batteries generally have multiple cells inside. For cells with poles at both ends, sampling must be done at both ends of the cell, which increases the structural complexity and cost of sampling.
  • the casing of the battery core is generally uncharged or has a low voltage, making it easy for the electrolyte in the battery core to corrode the casing and components on the casing, easily causing leakage of the battery core, and affecting the performance of the lithium-ion battery. Safe to use.
  • the structure of lithium-ion batteries needs to be improved to improve the overall safety performance of lithium-ion batteries.
  • One purpose of the embodiments of the present application is to provide a new technical solution for battery modules, battery packs and vehicles.
  • a battery module including:
  • a battery core assembly the battery core assembly includes a plurality of battery cores, poles are provided at opposite ends of each battery core in the plurality of battery cores, the plurality of battery cores are connected in series in sequence through connecting sheets, the Each battery core includes a housing, and on the positive side of the battery core assembly, a connecting piece connected to the positive electrode of each battery core is electrically connected to the housing of the corresponding battery core;
  • a sampling component electrically connects the housing on the negative side of the battery core component to the connecting piece.
  • a welding part is provided on the housing, and the sampling part is electrically connected to the welding part through the sampling terminal.
  • the sampling terminal includes a first sampling terminal and a second sampling terminal, the first sampling terminal is electrically connected to the welding part and one of the connecting pieces, and the second sampling terminal is connected to another of the connecting pieces.
  • the welding part is electrically connected.
  • the first sampling terminal includes a first connection section and a second connection section
  • the sampling part is electrically connected to the welding part through the first connection section
  • the connecting piece passes through the second connection section.
  • the segments are electrically connected to the welded portion.
  • the first sampling terminal is used to collect the information in the battery core by the sampling part through the welding part, and to apply voltage to the housing through the connecting piece;
  • the second sampling terminal is used to collect information in the battery core by the sampling part through the welding part.
  • the sampling component includes a protection part, one end of the protection part is electrically connected to the sampling terminal and the welding part, and the other end of the protection part is connected to the connecting piece.
  • sampling part and the protection part are at least one of a flexible circuit board and a printed circuit board.
  • sampling part (4) and the protective part (5) are integrally formed.
  • the sampling part is configured On the top side of the battery cell assembly, the protection part and the sampling part are arranged in parallel.
  • sampling part and the protecting part are perpendicular to each other.
  • the protection part is provided on the side of the battery core assembly where the pole is provided.
  • the sampling part is a first flexible connector, and the first flexible connector is plug-fitted with the sampler.
  • the protection part is a second flexible connector, and a protection circuit connecting the connecting piece and the housing is provided in the second flexible connector.
  • the protection circuit includes a fuse or fuse.
  • a frame is also included;
  • a plurality of battery cells are arranged side by side in the frame.
  • a battery pack including the battery module described in the first aspect.
  • a vehicle including the battery module described in the first aspect or the battery pack described in the second aspect.
  • An embodiment of the present application provides a battery module, which includes a battery cell component and a sampling component. After a certain voltage is applied to the housing through the sampling component, a certain voltage is applied to the housing, which can reduce the damage caused by the infiltration of the electrolyte in the battery core to the housing and ensure The integrity and stability of the casing are improved, and the use safety of the battery module is improved.
  • the sampling part can also sample from one side, which simplifies the structure of the sampling part and reduces the design cost of the sampling part.
  • Figure 1 is a perspective view of a battery module provided by an embodiment of the present application.
  • Figure 2 is an exploded view of a battery module provided by an embodiment of the present application.
  • Figure 3 is a schematic diagram of one end of a battery module provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of the other end of a battery module provided by an embodiment of the present application.
  • Figure 5 is a schematic diagram 2 of one end of a battery module provided by an embodiment of the present application.
  • Figure 6 is a schematic diagram 2 of the other end of a battery module provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram 1 of the cooperation between the sampling part and the protection part of a battery module provided by an embodiment of the present application;
  • Figure 8 is a schematic diagram 2 of the cooperation between the sampling part and the protection part of a battery module provided by an embodiment of the present application;
  • Figure 9 is a schematic diagram 3 of the cooperation between the sampling part and the protection part of a battery module provided by the embodiment of the present application.
  • Figure 10 is a schematic diagram 4 of the cooperation between the sampling part and the protection part of a battery module provided by the embodiment of the present application;
  • FIG 11 is a schematic diagram of a battery pack provided by an embodiment of the present application.
  • Figure 12 is a schematic diagram of a vehicle provided by an embodiment of the present application.
  • any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values.
  • an embodiment of the present application provides a battery module 100.
  • the battery module 100 can be used as a power battery for an electric vehicle.
  • the battery module 100 includes:
  • the sampling component is used to sample the battery core information of the battery core component, such as sampling the temperature, pressure, electrolyte storage volume, etc. of the battery core component to ensure that all The performance of the battery module 100 is stable.
  • the battery core assembly includes a plurality of battery cores 2.
  • the opposite ends of the battery core 2 are provided with poles.
  • One end of the multiple battery cores 2 can be alternately positive and negative.
  • the other ends of the plurality of battery cores 2 can also have positive and negative electrodes alternately in order to facilitate the series connection of the plurality of battery cores 2, as shown in Figure 1.
  • a plurality of the battery cores 2 are connected in series through connecting pieces 3. Since the opposite ends of the battery core 2 are provided with poles, that is, a plurality of the connecting pieces 3 are arranged on the battery core assembly. both ends.
  • the battery core 2 includes a housing 21, and an explosion-proof valve 22 may be provided on the housing 21.
  • the connecting piece 3 connected to the positive electrode of each battery core 2 is electrically connected to the casing 21 of the corresponding battery core 2.
  • each battery cell 2 is connected to the positive electrode side P.
  • the portion of the connecting piece 3 connected to the positive electrode of the battery core 2 is electrically connected to the casing 21 of the corresponding battery core 2 .
  • a certain voltage is applied to the casing 21 of the battery core 2 through the connecting piece 3, that is, a certain voltage is applied to the casing 21 and the explosion-proof valve 22, thereby improving the stability of the casing 21 and the explosion-proof valve.
  • the potential of 22 provides protection to the housing 21 and the explosion-proof valve 22.
  • the sampling assembly electrically connects the housing 21 on the negative side N of the cell assembly to the connecting piece 3, so that the sampling part 4 can collect each of the electrical Based on the battery core information such as the temperature, pressure, and electrolyte storage volume of the core 2, potential protection is formed on the housing 21.
  • a total positive electrode column and a total negative electrode column can be formed that are directly connected to the outside.
  • the side where the total positive electrode column is located is the positive electrode of the battery core assembly.
  • Side P the side where the total negative pole is located is the negative side N of the battery cell assembly.
  • the explosion-proof valve 22 can be made of thin aluminum material. After a certain voltage is applied to the housing 21 through the connecting piece 3, that is, the explosion-proof valve 22 on the housing 21 is A certain voltage can be reduced by The damage caused by the electrolyte in the battery core 2 infiltrating the casing 21 and the explosion-proof valve 22 ensures the integrity and stability of the casing 21 and the explosion-proof valve 22 and improves the performance of the battery module 100 Use security.
  • the sampling component can also be used for unilateral sampling, that is, it is only provided on one side of the battery core component, which simplifies the structure of the sampling component and reduces the design cost of the sampling component.
  • the battery module 100 provided by the embodiment of the present application includes a battery core assembly and a sampling assembly.
  • the battery core assembly includes a plurality of battery cells 2. The opposite ends of the battery core 2 are provided with poles. A plurality of The battery cells 2 are connected in series through the connecting piece 3.
  • the battery core 2 includes a housing 21 , and the connecting piece 3 connected to the positive electrode of each battery core 2 is electrically connected to the housing 21 of the corresponding battery core 2 . After a certain voltage is applied to the housing 21 through the sampling component, a certain voltage is applied to the housing 21, which can reduce the infiltration of the electrolyte in the battery core 2 to the housing 21. damage, ensuring the integrity and stability of the housing 21 and improving the safety of the battery module 100.
  • the sampling component can also sample from one side, which simplifies the structure of the sampling component and reduces the design cost of the sampling component.
  • the sampling assembly includes a sampling part 4, the sampling part 4 includes a sampling terminal 41 and an output terminal 42, the sampling terminal 41 is connected to the housing 21 and/or the The connecting piece 3 is electrically connected.
  • the sampling part 4 is electrically connected to the housing 21 through the sampling terminal 41, and the output terminal 42 is connected to an external sampling device, so that the temperature, pressure, and electrolysis of the battery core 2 can be measured.
  • the battery cell information such as the liquid storage volume is collected and transmitted to an external sampling device, and then the information is processed and monitored to ensure the operational stability of the battery module 100 .
  • the sampling terminal 41 is electrically connected to the connecting piece 3, the housing 21 can be charged with voltage through the connecting piece 3, thus ensuring the integrity and stability of the housing 21.
  • the housing 21 is provided with a welding part 7 , and the sampling part 4 is electrically connected to the welding part 7 through the sampling terminal 41 .
  • the sampling terminal 41 includes a first sampling terminal 411 and a second sampling terminal 412.
  • the first sampling terminal 411 is electrically connected to the welding portion 7 and the connecting piece 3.
  • the second sampling terminal 412 is electrically connected to the welding part 7 .
  • both the welding portion 7 and the connecting piece 3 can be passed through the first sampling Terminal 411 enables electrical connection. That is to say, the first sampling terminal 411 can realize the collection of information in the battery core 2 by the sampling part 4 through the welding part 7, and can also realize the collection of the housing 21 through the connecting piece 3. Apply voltage.
  • the second sampling terminal 412 can also be electrically connected only to the welding part 7. The two sampling terminals 412 realize the sampling part 4 to collect the information in the battery core 2 through the welding part 7 , thereby simplifying the structure of the sampling terminal 41 .
  • the connecting piece 3 and the housing 21 can be electrically connected through a component provided with a protection circuit.
  • the first sampling terminal 411 includes a first connection section 411a and a second connection section 411b.
  • the sampling part 4 is electrically connected to the welding part 7 through the first connection section 411a.
  • the connection piece 3 is electrically connected to the welding part 7 through the second connection section 411b.
  • the connecting piece 3 can apply a voltage to the housing 21 through the second connecting section 411b, And a fuse circuit can be provided on the second connection section 411b.
  • the first connecting section 411a and the second connecting section 411b are integrally formed to form the first sampling terminal 411.
  • One end of the first sampling terminal 411 is connected to the welding part 7.
  • the first sampling terminal The other end of 411 is connected to the connecting piece 3 , and the middle position of the first sampling terminal 411 can be welded to the housing 21 of the battery core 2 . That is to say, the middle part of the first sampling terminal 411 only needs to be welded once to simultaneously apply voltage to the housing 21 of the battery core 2 and sample the sampling part 4, simplifying the installation of the first sampling terminal 411. Structure and production time costs.
  • the sampling assembly includes a protection part 5.
  • One end of the protection part 5 is electrically connected to the sampling terminal 41 and the welding part 7, and the other end of the protection part 5 is connected to The connecting piece 3 is connected.
  • the protective portion 5 can be disposed between the connecting piece 3 and the welding portion 7 of the housing 21 .
  • the protection part 5 may specifically be a fuse (fuse protection circuit) or a protection circuit such as a fuse to ensure the stability of the voltage on the housing 21 .
  • the sampling part 4 and the protection part 5 are at least one of a flexible circuit board and a printed circuit board.
  • the sampling part 4 and the protective part 5 may be integrally formed into an assembly.
  • the assembly may have an assembly base.
  • the assembly base may be a PCB (Printed Circuit Board, printed circuit board) base or an FPC (Flexible Printed Circuit, flexible circuit board) base.
  • the sampling part 4 and the The protective part 5 can be uniformly formed on the assembly base to improve the integrity and compactness of the sampling part 4 and the protective part 5 .
  • the sampling part 4 and the protection part 5 are PCB or double-sided FPC.
  • the sampling part 4 and the protective part 5 are PCBs
  • the sampling part 4 and the protective part 5 can be molded together on the PCB base, so that the assembly forms PCB, PCB can be an integrated BIC (Battery Information Collector, battery information collector).
  • BIC Battery Information Collector
  • the good anti-EMC (anti-electromagnetic interference) performance of the PCB can be used to reduce the impact of electromagnetic interference on the sampling part. 4 and the influence of the protective part 5.
  • sampling part 4 and the protection part 5 may be two independent FPCs, see Figures 4 to 9; or they may be The circuit of the sampling part 4 is etched on one side of the FPC base, as shown in Figure 7, and the circuit of the protective part 5 is etched on the other side of the FPC base, as shown in Figure 8, to form the double-sided FPC, as shown in Figure 9 .
  • the sampling part 4 is provided on the top side of the battery core assembly.
  • the width of the sampling part 4 can be flexibly adjusted. For example, the width of the sampling part 4 can be made wider.
  • the changes of the sampling part 4 in Figure 8 relative to the sampling part 4 in Figure 7 are as follows. The change of the sampling part 4 in Figure 10 relative to the sampling part 4 in Figure 9 is to meet the space required for wiring in the sampling part 4.
  • the sampling part 4 may not overlap with the high-voltage circuit at the end of the battery core 2 , thereby reducing the risk of the sampling part 4 being affected by EMC (electromagnetic interference).
  • the protection part 5 is provided at the end of the battery core assembly where the pole post 23 is provided.
  • the connecting pieces 3 are provided at both ends of the battery core assembly.
  • the protective part 5 may be provided at the end of the battery core assembly. Since the sampling part 4 is disposed on the top side of the battery core assembly, the sampling part 4 and the protective part 5 can form a mutually perpendicular structure, so that the protective part 5 and the connecting piece 3 are in the At the same end of the battery core 2, the connecting piece 3 can be easily connected to the housing at the corresponding end of the battery core 2 through the protective portion 5, thus simplifying the structure of the protective portion 5.
  • the protection part 5 and the sampling part 4 are arranged in parallel.
  • the protection part 5 can be It is arranged parallel to the sampling part 4 . Since the sampling part 4 is disposed on the top side of the battery core assembly, that is, the protection part 5 can also be disposed on the top side of the battery core assembly or in a space higher than the battery core assembly to ensure that The performance of the protective part 5 is stable.
  • the sampling part 4 is a first flexible connector, and the first flexible connector is plug-fitted with the sampler 6 through a plug connector.
  • the first flexible connector may be FPC (Flexible Printed Circuit, flexible circuit board), FFC (Flexible Flat Cable, flexible flat cable) or FDC (flexible conductive cable), and the width of the first flexible connector is Adjustable.
  • FPC Flexible Printed Circuit, flexible circuit board
  • FFC Flexible Flat Cable, flexible flat cable
  • FDC flexible conductive cable
  • the width of the first flexible connector is Adjustable.
  • the sampler 6 can process the first flexible connector.
  • the flexible connector collects the cell information of each of the cells 2 . Because the first flexible connector has a flexible structure, the position and extension of the first flexible connector can be flexibly set, thereby improving the structural flexibility of the sampling part 4 .
  • the protection part 5 is a second flexible connector, and a protection circuit connecting the connecting piece 3 and the housing 21 is provided in the second flexible connector.
  • the battery module 100 further includes a frame 1; a plurality of the battery cells 2 are arranged side by side in the frame 1.
  • the frame 1 may include a lower plate 11 , an upper plate 12 and a side plate 13 .
  • the side plate 13 is connected between the lower plate 11 and the upper plate 12 .
  • the lower plate 11, the upper plate 12 and the side plates 13 form an accommodation cavity 14 by bonding, welding or threading.
  • the battery core assembly is arranged in the accommodation cavity 14 in the frame 1. Through the frame 1 can provide support and protection for the battery core assembly.
  • FIG 11 is a schematic diagram of a battery pack provided by an embodiment of the present application.
  • An embodiment of the present application also provides a battery pack 200, which includes at least one of the battery modules 100 described above.
  • Figure 12 is a schematic diagram of a vehicle provided by an embodiment of the present application.
  • An embodiment of the present application also provides a vehicle 300.
  • the vehicle includes the battery pack 200, and at least one of the battery modules 100 is disposed in the battery pack 200.
  • the battery module 100 of the vehicle 300 includes a battery core assembly and a sampling assembly.
  • the battery core assembly includes a plurality of battery cells 2, and poles are provided at opposite ends of the battery core 2.
  • a plurality of the battery cells 2 The battery cells 2 are connected in series through the connecting piece 3.
  • the battery core 2 includes a housing 21 , and the connecting piece 3 connected to the positive electrode of each battery core 2 is electrically connected to the housing 21 of the corresponding battery core 2 . After a certain voltage is applied to the housing 21 through the sampling component, a certain voltage is applied to the housing 21, which can reduce the infiltration of the electrolyte in the battery core 2 to the housing 21. damage, ensuring the integrity and stability of the housing 21 and improving the safety of the vehicle 300.

Abstract

一种电池模组、电池包和车辆，该电池模组包括电芯组件和采样组件，该电芯组件的电芯的相对两端设置有极柱，多个该电芯通过连接片依次串联，在该电芯组件的正极侧，与每个该电芯正极连接的连接片电连接至相应该电芯的壳体。该采样组件将该电芯组件负极侧的该壳体和该连接片形成电连接。

Description

电池模组、电池包和车辆
本申请要求于2022年3月7日提交中国专利局、申请号为202220482834.0、申请名称为“电池模组、电池包和车辆”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池结构技术领域，具体地，本申请涉及一种电池模组、电池包和车辆。
背景技术
目前，锂离子电池具有高工作电压、高比能量、循环寿命长、无环境污染等优点，不仅在移动式通讯设备和便携式电子设备上得到广泛应用，而且也广泛应用于电动汽车、电动自行车以及电动工具等大中型电动设备方面，是目前各大电池厂家发展的主要方向。
锂离子电池的内部一般设置有多个电芯，对于两端设置极柱的电芯，采样时须在电芯的两端进行，增加了采样的结构复杂性和结构成本。而且电芯的壳体上一般不带电或者电压较低，使得电芯中的电解液容易对壳体以及壳体上的组件进行腐蚀，容易造成电芯漏液的问题，影响了锂离子电池的使用安全。
所以，需要对锂离子电池的结构进行改进，以提升锂离子电池的整体安全性能。
发明内容
本申请实施例的一个目的是提供一种电池模组、电池包和车辆的新技术方案。
根据本申请的第一方面，提供了一种电池模组，包括：
电芯组件，所述电芯组件包括多个电芯，所述多个电芯中的每个电芯的相对两端设置有极柱，所述多个电芯通过连接片依次串联，所述每个电芯包括壳体，在所述电芯组件的正极侧，与所述每个电芯正极连接的连接片电连接至相应所述电芯的壳体；
采样组件，所述采样组件将所述电芯组件负极侧的所述壳体和所述连接片形成电连接。
可选地，所述采样组件包括采样部，所述采样部包括采样端子和输出端子，所述采样端子与所述壳体和/或所述连接片电连接。
可选地，所述壳体上设置有焊接部，所述采样部通过所述采样端子与所述焊接部电连接。
可选地，所述采样端子包括第一采样端子和第二采样端子，所述第一采样端子与所述焊接部和一个所述连接片电连接，所述第二采样端子与另一个所述焊接部电连接。
可选地，所述第一采样端子包括第一连接段和第二连接段，所述采样部通过所述第一连接段电连接至所述焊接部，所述连接片通过所述第二连接段电连接至所述焊接部。
可选地，所述第一采样端子用于通过所述焊接部实现所述采样部对所述电芯中的信息的采集，并通过所述连接片对所述壳体施加电压；和
所述第二采样端子用于通过所述焊接部实现所述采样部对所述电芯中信息的采集。
可选地，所述采样组件包括保护部，所述保护部的一端电连接所述采样端子和所述焊接部，所述保护部的另一端与所述连接片连接。
可选地，所述采样部和所述保护部为柔性电路板和印刷电路板中的至少一种。
可选地，所述采样部(4)和所述保护部(5)一体成型。可选地，所述采样部设置 于所述电芯组件的顶侧，所述保护部与所述采样部平行设置。
可选地，所述采样部和所述保护部相互垂直。
可选地，所述保护部设置于所述电芯组件设置有所述极柱的一侧。
可选地，所述采样部为第一柔性连接件，所述第一柔性连接件与采样器插接配合。
可选地，所述保护部为第二柔性连接件，所述第二柔性连接件内设置有连接所述连接片和所述壳体的保护电路。
可选地，所述保护电路包括熔断器或保险丝。
可选地，还包括框架；
多个所述电芯并排设置于所述框架内。
根据本申请的第二方面，提供了一种电池包，包括第一方面所述的电池模组。
根据本申请的第三方面，提供了一种车辆，包括第一方面所述的电池模组或第二方面所述的电池包。
本申请实施例的一个技术效果在于：
本申请实施例提供了一种电池模组，所述电池模组包括电芯组件和采样组件。所述壳体在通过所述采样组件施加一定电压后，也就是给所述壳体带上了一定的电压，可以减少所述电芯中电解液对所述壳体浸润带来的损伤，保证了所述壳体的完整性和稳定性，提升了所述电池模组的使用安全性。另外，所述采样部也可以单侧采样，简化了所述采样部的结构，降低了所述采样部的设计成本。
通过以下参照附图对本申请的示例性实施例的详细描述，本申请的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本申请的实施例，并且连同其说明一起用于解释本申请的原理。
图1为本申请实施例提供的一种电池模组的立体图；
图2为本申请实施例提供的一种电池模组的爆炸图；
图3为本申请实施例提供的一种电池模组的一端示意图一；
图4为本申请实施例提供的一种电池模组的另一端示意图一；
图5为本申请实施例提供的一种电池模组的一端示意图二；
图6为本申请实施例提供的一种电池模组的另一端示意图二；
图7为本申请实施例提供的一种电池模组的采样部和保护部配合示意图一；
图8为本申请实施例提供的一种电池模组的采样部和保护部配合示意图二；
图9为本申请实施例提供的一种电池模组的采样部和保护部配合示意图三；
图10为本申请实施例提供的一种电池模组的采样部和保护部配合示意图四；
图11为本申请实施例提供的一种电池包的示意图；
图12为本申请实施例提供的一种车辆的示意图。
其中：
1、框架；11、下板；12、上板；13、侧板；14、容纳腔；2、电芯；21、壳体；22、
防爆阀；23、极柱；3、连接片；4、采样部；41、采样端子；411、第一采样端子；411a、第一连接段；411b、第二连接段；412、第二采样端子；42、输出端子；5、保护部；6、采样器；7、焊接部；100、电池模组；200、电池包；300、车辆；P、电芯组件的正极侧；N、电芯组件的负极侧。
具体实施方式
现在将参照附图来详细描述本申请的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本申请的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
参照图1至图10，本申请实施例提供了一种电池模组100，所述电池模组100可以用于电动汽车的动力电池，所述电池模组100包括：
电芯组件和采样组件，所述采样组件用于对所述电芯组件的电芯信息进行采样，比如对所述电芯组件的温度、压力、电解液储液量等进行采样，以保证所述电池模组100的性能稳定。
参见图2和图3，所述电芯组件包括多个电芯2，所述电芯2的相对两端设置有极柱，多个所述电芯2的一端可以为正负极依次交替，多个所述电芯2的另一端同样可以为正负极依次交替，以便于多个所述电芯2的串联，如图1所示。
参见图1至图3，多个所述电芯2通过连接片3依次串联，由于所述电芯2的相对两端设置有极柱，也就是多个所述连接片3设置于电芯组件的两端。所述电芯2包括壳体21，所述壳体21上可以设置有防爆阀22。继续参见图4，在所述电芯组件的正极侧P，与每个所述电芯2正极连接的连接片3电连接至相应所述电芯2的壳体21，具体为每个所述连接片3上与所述电芯2正极连接的部分电连接至相应所述电芯2的壳体21。通过所述连接片3给所述电芯2的壳体21施加一定的电压，也就是给所述壳体21以及防爆阀22带上了一定的电压，提高了所述壳体21和防爆阀22的电位，给所述壳体21和防爆阀22形成了保护。
参见图2和图3，所述采样组件将所述电芯组件负极侧N的所述壳体21和所述连接片3形成电连接，使得所述采样部4可以在采集每个所述电芯2的温度、压力、电解液储液量等电芯信息的基础上，给所述壳体21上形成电位保护。具体地，多个所述电芯2通过连接片3依次串联后，可以形成直接与外部连接的一个总正极柱和总负极柱，总正极柱所在的一侧即为所述电芯组件的正极侧P，总负极柱所在的一侧即为所述电芯组件的负极侧N。
具体地，所述防爆阀22可以由较薄的铝材制成，所述壳体21在通过所述连接片3施加一定电压后，也就是给所述壳体21上的防爆阀22带上了一定的电压，可以降低所 述电芯2中电解液对所述壳体21和防爆阀22浸润带来的损伤，保证了所述壳体21和防爆阀22的完整性和稳定性，提升了所述电池模组100的使用安全性。而且所述采样组件也可以单侧采样，也就是仅仅设置于所述电芯组件的一侧，简化了所述采样组件的结构，降低了所述采样组件的设计成本。
本申请实施例提供的所述电池模组100包括电芯组件和采样组件，所述电芯组件包括多个电芯2，所述电芯2的相对两端设置有极柱，多个所述电芯2通过连接片3依次串联。所述电芯2包括壳体21，与每个所述电芯2正极连接的连接片3电连接至相应所述电芯2的壳体21。所述壳体21在通过所述采样组件施加一定电压后，也就是给所述壳体21带上了一定的电压，可以减少所述电芯2中电解液对所述壳体21浸润带来的损伤，保证了所述壳体21的完整性和稳定性，提升了所述电池模组100的使用安全性。另外，由于所述电芯2的壳体21带电，进而所述采样组件也可以单侧采样，简化了所述采样组件的结构，降低了所述采样组件的设计成本。
可选地，参见图1至图3，所述采样组件包括采样部4，所述采样部4包括采样端子41和输出端子42，所述采样端子41与所述壳体21和/或所述连接片3电连接。
具体地，所述采样部4通过所述采样端子41与所述壳体21电连接，并且将所述输出端子42与外部采样设备连接，便可以将所述电芯2的温度、压力、电解液储液量等电芯信息采集后传输至外部的采样设备，进而进行信息处理和监测，保证所述电池模组100的运行稳定性。而所述采样端子41与所述连接片3电连接时，可以通过所述连接片3给所述壳体21带上电压，保证了所述壳体21的完整性和稳定性。
可选地，所述壳体21上设置有焊接部7，所述采样部4通过所述采样端子41与所述焊接部7电连接。
具体地，所述采样端子41的一端可以搭接在所述采样部4的采样主体上，所述采样端子41的另一端或者中间位置可以焊接于所述壳体21的焊接部7上，所述焊接部7具体可以是在所述壳体21上设置的焊点，以便于所述采样端子41与所述壳体21进行焊接。通过所述焊接部7，所述采样端子41可以实现所述壳体21与所述采样部4的电连接。并且借助所述采样端子41焊接速度快、热变形小和致密性高等特征，可以保证所述采样部4有效采集每个所述电芯2的温度、压力、电解液储液量等电芯信息。
可选地，参见图3至图6，所述采样端子41包括第一采样端子411和第二采样端子412，所述第一采样端子411与所述焊接部7和所述连接片3电连接，所述第二采样端子412与所述焊接部7电连接。
所述采样组件将所述电芯组件负极侧N的所述壳体21和所述连接片3形成电连接时，可以将所述焊接部7和所述连接片3均通过所述第一采样端子411实现电连接。也就是所述第一采样端子411既可以通过所述焊接部7实现所述采样部4对所述电芯2中信息的采集，又可以通过所述连接片3实现对所述壳体21的施加电压。而在所述采样端子41的部分采样端子仅需要对所述电芯2中信息的进行采集时，也可以只将所述第二采样端子412仅与所述焊接部7电连接，所述第二采样端子412通过所述焊接部7实现所述采样部4对所述电芯2中信息的采集，简化了所述采样端子41的结构。而所述连接片3和所述壳体21之间可以通过设置有保护电路的组件实现电连接。
可选地，所述第一采样端子411包括第一连接段411a和第二连接段411b，所述采样部4通过所述第一连接段411a电连接至所述焊接部7，所述连接片3通过所述第二连接段411b电连接至所述焊接部7。
具体地，所述采样部4通过所述第一连接段411a来对所述电芯2进行采样时，所述连接片3可以通过所述第二连接段411b对所述壳体21施加电压，并且所述第二连接段411b上可以设置保险电路。所述第一连接段411a与所述第二连接段411b一体成型后形成所述第一采样端子411，所述第一采样端子411的一端连接至所述焊接部7，所述第一采样端子411的另一端连接至所述连接片3，而所述第一采样端子411的中间位置可以焊接至所述电芯2的壳体21上。也就是所述第一采样端子411的中部只需焊接一次便可以同时实现对所述电芯2的壳体21施加电压和所述采样部4的采样，简化了所述第一采样端子411的结构及生产的时间成本。
可选地，参见图2至图7，所述采样组件包括保护部5，所述保护部5的一端电连接所述采样端子41和所述焊接部7，所述保护部5的另一端与所述连接片3连接。
具体地，所述壳体21在通过所述连接片3施加一定电压后，由于所述连接片3直接与所述电芯2的极柱连接，为了避免所述连接片3在电压过高时对所述壳体21造成损坏，可以将所述保护部5设置于所述连接片3和所述壳体21的焊接部7之间。所述保护部5具体可以是熔断器(fuse保护电路)或者保险丝等保护电路，以保证所述壳体21上电压的稳定。
可选地，所述采样部4和所述保护部5为柔性电路板和印刷电路板中的至少一种。另外，参见图2至图5，所述采样部4和所述保护部5可以一体形成组合件。
具体地，所述组合件可以具有组合件基体，比如组合件基体可以为PCB(Printed Circuit Board，印刷电路板)基体或者FPC(Flexible Printed Circuit，柔性电路板)基体，所述采样部4和所述保护部5可以均成型于所述组合件基体上，以提高所述采样部4和所述保护部5的整体性和紧凑性。
可选地，所述采样部4和所述保护部5为PCB或者双面FPC。参加图2和图3，在所述采样部4和所述保护部5为PCB的情况下，所述采样部4和所述保护部5可以一同成型于PCB基体上，使得所述组合件形成PCB，PCB可以为集成式的BIC(Battery Information Collector，电池信息采集器)。通过所述PCB组合件的设置，不仅可以保证所述采样部4和所述保护部5的性能发挥，还可以利用PCB良好的抗EMC(抗电磁干扰)性能来降低电磁干扰对所述采样部4和所述保护部5的影响。而在所述采样部4和所述保护部5为FPC的情况下，可以是所述采样部4和所述保护部5分别为独立的两个FPC，参见图4至图9；也可以通过在FPC基体的一面蚀刻采样部4的电路，如图7所示，在FPC基体的另一面蚀刻保护部5的电路，如图8所示，以形成所述双面FPC，如图9所示。
可选地，参见图1至图3，所述采样部4设置于所述电芯组件的顶侧。
具体地，由于所述电芯2的相对两端设置有极柱23并且所述电芯2横置于框架1内，而所述电芯组件的顶侧具有平整的顶面，因此所述采样部4设置于所述电芯组件的顶侧时，可以使得所述采样部4的宽度尺寸(也就是沿电芯2延伸方向的尺寸)不受所述电芯2侧面极柱等结构的影响，而且所述电芯2侧面高度也不会影响所述采样部4的尺寸。所述采样部4的宽度尺寸可以灵活调整，比如所述采样部4的宽度可以做的宽一些，如图8中所述采样部4相对于图7中所述采样部4的变化，以及图10中所述采样部4相对于图9中所述采样部4的变化，以满足所述采样部4中走线所需的空间。
而且所述采样部4可以不与所述电芯2端部的高压回路相重叠，降低了所述采样部4被EMC(电磁干扰)的风险。
可选地，参见图1至图3以及图7和图8，所述保护部5设置于所述电芯组件设置有所述极柱23的端部。
具体地，由于所述电芯2的相对两端设置有极柱23，也就是多个所述连接片3设置于电芯组件的两端。为了便于所述保护部5设置于所述连接片3和所述壳体21之间，可以将所述保护部5设置于所述电芯组件的端部。由于所述采样部4设置于所述电芯组件的顶侧，所述采样部4和所述保护部5可以形成相互垂直的结构，使得所述保护部5和所述连接片3处于所述电芯2的同一端，这样所述连接片3便可以方便地通过所述保护部5连接至所述电芯2相应一端的壳体上，简化所述保护部5的结构。
可选地，参见图9和图10，所述保护部5与所述采样部4平行设置。
具体地，由于所述连接片3直接与所述电芯2的极柱23连接，为了避免所述连接片3在电压过高时对所述保护部5造成干扰，可以将所述保护部5与所述采样部4平行设置。由于所述采样部4设置于所述电芯组件的顶侧，也就是所述保护部5也可以设置于所述电芯组件的顶侧或者高于所述电芯组件的空间内，以保证所述保护部5的性能稳定。
可选地，参见图1，所述采样部4为第一柔性连接件，所述第一柔性连接件通过插接件与采样器6插接配合。
具体地，所述第一柔性连接件可以为FPC(Flexible Printed Circuit，柔性电路板)、FFC(Flexible Flat Cable，柔性扁平电缆)或FDC(柔性导电电缆)，所述第一柔性连接件的宽度可调。所述第一柔性连接件在与每个所述电芯2的壳体21电连接的情况下，通过插接件与采样器6插接配合后，所述采样器6可以处理所述第一柔性连接件采集每个所述电芯2的电芯信息。而因为所述第一柔性连接件具有柔性结构，可以灵活设置所述第一柔性连接件的位置和延伸走向，提高所述采样部4的结构灵活性。
可选地，参见图1和图2，所述保护部5为第二柔性连接件，所述第二柔性连接件内设置有连接所述连接片3和所述壳体21的保护电路。
具体地，所述第二柔性连接件可以为FPC(Flexible Printed Circuit，柔性电路板)、FFC(Flexible Flat Cable，柔性扁平电缆)或FDC(柔性导电电缆)，所述第二柔性连接件的一端可以与所述连接片3电连接，所述第二柔性连接件的另一端可以连接至所述壳体21，以便于通过所述连接片3给所述电芯2的壳体21施加一定的电压。而为了避免所述连接片3在电压过高时对所述壳体21造成损坏，可以在所述第二柔性连接件内设置有连接所述连接片3和所述壳体21的保护电路，所述保护电路可以为熔断器(fuse保护电路)或者保险丝等保护电路，保证所述壳体21的结构完整性。
可选地，所述电池模组100还包括框架1；多个所述电芯2并排设置于所述框架1内。
具体地，参见图2，所述框架1可以包括下板11、上板12和侧板13，所述侧板13连接于所述下板11和所述上板12之间。所述下板11、上板12和侧板13通过粘接、焊接或者螺纹连接的方式形成容纳腔14，所述电芯组件设置于所述框架1内的容纳腔14中，通过所述框架1可以给所述电芯组件提供支撑和防护。
参见图11，图11为本申请实施例提供的一种电池包的示意图。本申请实施例还提供了一种电池包200，所述电池包200包括至少一个所述的电池模组100。
具体地，所述电池包200可以作为车辆的动力电池，所述电池模组100包括电芯组件和采样组件，所述电芯组件包括多个电芯2，所述电芯2的相对两端设置有极柱，多个所述电芯2通过连接片3依次串联。所述电芯2包括壳体21，与每个所述电芯2正极 连接的连接片3电连接至相应所述电芯2的壳体21。所述壳体21在通过所述采样组件施加一定电压后，也就是给所述壳体21带上了一定的电压，可以减少所述电芯2中电解液对所述壳体21浸润带来的损伤，保证了所述壳体21的完整性和稳定性，提升了所述电池包200的使用安全性。
参见图12，图12为本申请实施例提供的一种车辆的示意图。本申请实施例还提供了一种车辆300，所述车辆包括所述电池包200，所述电池包200内设置有至少一个所述的电池模组100。
具体地，所述车辆300的电池模组100包括电芯组件和采样组件，所述电芯组件包括多个电芯2，所述电芯2的相对两端设置有极柱，多个所述电芯2通过连接片3依次串联。所述电芯2包括壳体21，与每个所述电芯2正极连接的连接片3电连接至相应所述电芯2的壳体21。所述壳体21在通过所述采样组件施加一定电压后，也就是给所述壳体21带上了一定的电压，可以减少所述电芯2中电解液对所述壳体21浸润带来的损伤，保证了所述壳体21的完整性和稳定性，提升了所述车辆300的使用安全性。
虽然已经通过例子对本申请的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本申请的范围。本领域的技术人员应该理解，可在不脱离本申请的范围和精神的情况下，对以上实施例进行修改。本申请的范围由所附权利要求来限定。

Claims (18)

  1. 一种电池模组(100)，其特征在于，包括：
    电芯组件，所述电芯组件包括多个电芯(2)，所述多个电芯(2)中每个电芯(2)的相对两端设置有极柱(23)，所述多个电芯(2)通过连接片(3)依次串联，所述每个电芯(2)包括壳体(21)，在所述电芯组件的正极侧(P)，与所述每个电芯(2)正极连接的连接片(3)电连接至相应所述电芯(2)的壳体(21)；和
    采样组件，所述采样组件将所述电芯组件负极侧(N)的所述壳体(21)和所述连接片(3)形成电连接。
  2. 根据权利要求1所述的电池模组(100)，其特征在于，所述采样组件包括采样部(4)，所述采样部(4)包括采样端子(41)和输出端子(42)，所述采样端子(41)与所述壳体(21)和/或所述连接片(3)电连接。
  3. 根据权利要求2所述的电池模组(100)，其特征在于，所述壳体(21)上设置有焊接部(7)，所述采样部(4)通过所述采样端子(41)与所述焊接部(7)电连接。
  4. 根据权利要求3所述的电池模组(100)，其特征在于，所述采样端子(41)包括第一采样端子(411)和第二采样端子(412)，所述第一采样端子(411)与一个所述焊接部(7)和所述连接片(3)电连接，所述第二采样端子(412)与另一个所述焊接部(7)电连接。
  5. 根据权利要求4所述的电池模组(100)，其特征在于，所述第一采样端子(411)包括第一连接段(411a)和第二连接段(411b)，所述采样部(4)通过所述第一连接段(411a)电连接至所述焊接部(7)，所述连接片(3)通过所述第二连接段(411b)电连接至所述焊接部(7)。
  6. 根据权利要求5所述的电池模组(100)，其特征在于，所述第一采样端子(411)用于通过所述焊接部(7)实现所述采样部(4)对所述电芯(2)中信息的采集，并通过所述连接片(3)对所述壳体(21)施加电压；和
    所述第二采样端子(412)用于通过所述焊接部(7)实现所述采样部(4)对所述电芯(2)中信息的采集。
  7. 根据权利要求3至6任一项所述的电池模组(100)，其特征在于，所述采样组件包括保护部(5)，所述保护部(5)的一端电连接所述采样端子(41)和所述焊接部(7)，所述保护部(5)的另一端与所述连接片(3)连接。
  8. 根据权利要求7所述的电池模组(100)，其特征在于，所述采样部(4)和所述保护部(5)为柔性电路板和印刷电路板中的至少一种。
  9. 根据权利要求7或8所述的电池模组(100)，其特征在于，所述采样部(4)和所述保护部(5)一体成型。
  10. 根据权利要求7至9任一项所述的电池模组(100)，其特征在于，所述采样部(4)设置于所述电芯组件的顶侧，所述保护部(5)与所述采样部(4)平行设置。
  11. 根据权利要求7至9任一项所述的电池模组(100)，其特征在于，所述采样部(4)和所述保护部(5)互相垂直。
  12. 根据权利要求7至11任一项所述的电池模组(100)，其特征在于，所述保护部(5)设置于所述电芯组件设置有所述极柱(23)的一侧。
  13. 根据权利要求1至12任一项所述的电池模组(100)，其特征在于，所述采样 部(4)为第一柔性连接件，所述第一柔性连接件与采样器(6)插接配合。
  14. 根据权利要求7至13任一项所述的电池模组(100)，其特征在于，所述保护部(5)为第二柔性连接件，所述第二柔性连接件内设置有连接所述连接片(3)和所述壳体(21)的保护电路。
  15. 根据权利要求14所述的电池模组(100)，其特征在于，所述保护电路包括熔断器或保险丝。
  16. 根据权利要求1至15任一项所述的电池模组(100)，其特征在于，还包括框架(1)；
    多个所述电芯(2)并排设置于所述框架(1)内。
  17. 一种电池包(200)，其特征在于，包括权利要求1-16任一项所述的电池模组(100)。
  18. 一种车辆(300)，其特征在于，包括权利要求1-16任一项所述的电池模组(100)或权利要求17所述的电池包(200)。
PCT/CN2023/080041 2022-03-07 2023-03-07 电池模组、电池包和车辆 WO2023169406A1 (zh)

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