WO2022115995A1 - 互连件和电池包、用电设备 - Google Patents

互连件和电池包、用电设备 Download PDF

Info

Publication number
WO2022115995A1
WO2022115995A1 PCT/CN2020/133108 CN2020133108W WO2022115995A1 WO 2022115995 A1 WO2022115995 A1 WO 2022115995A1 CN 2020133108 W CN2020133108 W CN 2020133108W WO 2022115995 A1 WO2022115995 A1 WO 2022115995A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulating
main cable
board
interconnection
terminal
Prior art date
Application number
PCT/CN2020/133108
Other languages
English (en)
French (fr)
Inventor
李坤龙
王慎波
凌先进
Original Assignee
东莞新能安科技有限公司
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 东莞新能安科技有限公司 filed Critical 东莞新能安科技有限公司
Priority to PCT/CN2020/133108 priority Critical patent/WO2022115995A1/zh
Priority to CN202080024746.XA priority patent/CN114946069A/zh
Publication of WO2022115995A1 publication Critical patent/WO2022115995A1/zh

Links

Images

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
    • H01M10/42—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
    • 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 sampling design of soft pack batteries, in particular to an interconnection, a battery pack and an electrical device having the interconnection.
  • a battery pack usually includes multiple cells (also known as battery cells) connected in series or in parallel. Overvoltage, overcurrent or overheating in some cells may adversely affect the safety and operational efficiency of the battery pack. , it is very necessary to sample the information such as the voltage or current of the cell, and take corresponding control strategies according to the sampling results.
  • FFC flexible flat cables
  • the flexible flat cable is soft, and its structural strength is difficult to meet the sampling design requirements.
  • the area where the terminal of the flexible flat cable is located is relatively soft, and the ability to shape the structural posture is poor, resulting in the reliability of the electrical connection between the terminal and the cell tab. lower.
  • a first aspect of the present application provides an interconnection for electrically connecting a battery protection board and a battery module.
  • the interconnect includes a flexible flat cable, an insulating rigid board, and a connector.
  • the flexible flat cable includes a main cable and several terminals, the several terminals are branched from one end of the main cable, each terminal is electrically connected to at least one line of the main cable, and is electrically connected to the tabs of the cells of the battery module.
  • Several terminals are fixed relative to the side surface of the insulating rigid board.
  • the connector is arranged on the other end of the main cable and electrically connects the main cable of the flexible flat cable and the battery protection board.
  • the interconnecting piece relatively fixes the terminals of the flexible flat cable on the insulating hard plate, and the weak area of the flexible flat cable (that is, the area where the terminal is located) is structurally reinforced through the insulating hard plate, which is beneficial to improve the electrical connection between the terminal and the battery core tab. Connection reliability, so as to meet the design requirements of cell sampling.
  • the interconnecting member further includes a plurality of conductive hard sheets, and one conductive hard sheet is connected to a terminal and a tab of the battery module.
  • the conductive hard sheet is a long strip of metal that is not easily deformed. It can be regarded as the expansion of the conductive part of the terminal, which can not only increase the contact area with the tab, but also is not easily deformed, making the connection between the terminal and the tab stable. More reliable, further ensuring that cell sampling design requirements are met.
  • one side of the insulating hard board is provided with adhesive, and one end of each conductive hard sheet and one end of the main cable are respectively adhered to one side of the insulating hard board through the adhesive.
  • the interconnection further includes insulating sealant, which wraps the connection between the terminal and the conductive hard sheet.
  • the outer side of the terminal is provided with an outer film, and the insulating sealant wraps the outer film at the connection between the terminal and the conductive hard sheet.
  • the insulating hard board is also provided with an alignment mark, which is used for positioning when the interconnecting member is electrically connected to the battery pack.
  • the alignment mark includes at least one notch opened on the side of the insulating hard plate.
  • a second aspect of the present application provides a battery pack, including a battery module, a battery protection board, and the interconnection member described in any one of the above, where the interconnection member electrically connects the battery module and the battery protection board.
  • the battery pack adopts the aforementioned interconnection, and the terminals of the flexible flat cable are relatively fixed on the insulating hard plate, and the weak area of the flexible flat cable (that is, the area where the terminal is located) is structurally reinforced through the insulating hard plate, which is beneficial to improve the connection between the terminal and the battery.
  • the electrical connection reliability of the cell tabs of the module can meet the design requirements for cell sampling of the battery pack.
  • the battery pack further includes a fixing glue, and the fixing glue wraps the connection between the connector and the battery protection board.
  • the battery pack further includes a casing and a potting glue.
  • the casing is formed with a cell slot, the cell is accommodated in the cell slot, and a potting seal is provided between the side of the cell where the tabs are arranged and the groove wall of the cell slot.
  • the insulating hard board and several terminals are located in the potting area, and the potting glue fills the potting area and wraps the insulating hard board and several terminals.
  • a third aspect of the present application provides an electrical device, including a battery pack and a load.
  • the battery pack is used for supplying power to the load, and the battery pack includes a battery module and an interconnection, and the interconnection is used for electrically connecting the cells of the battery module and the battery protection board.
  • Interconnects include flexible flat cables, insulating rigid boards, and connectors.
  • the flexible flat cable includes a main cable and several terminals, the several terminals are branched from one end of the main cable, and each terminal is electrically connected to at least one wire of the main cable and is electrically connected to the tabs of the cells of the battery module.
  • Several terminals are fixed relative to the side surface of the insulating rigid board.
  • the connector is arranged on the other end of the main cable and electrically connects the main cable of the flexible flat cable and the battery protection board.
  • the electrical equipment adopts the aforementioned interconnection, and the terminals of the flexible flat cable are relatively fixed on the insulating hard plate.
  • the electrical connection reliability of the cell tabs can meet the design requirements of cell sampling.
  • the interconnecting member further includes a plurality of conductive hard sheets, and one conductive hard sheet is connected to a terminal and a tab of the battery module.
  • the electrical equipment includes electric tools, or drones, or electric vehicles, or electric cleaning tools, or energy storage products.
  • one side of the insulating hard board is provided with adhesive, and one end of each conductive hard sheet and one end of the main cable are respectively adhered to one side of the insulating hard board through the adhesive.
  • the interconnection further includes insulating sealant, and the insulating sealant wraps the connection between the terminal and the conductive hard sheet.
  • the terminal of the flexible flat cable is relatively fixed on the insulating hard plate, and the weak area of the flexible flat cable (that is, the area where the terminal is located) is structurally reinforced through the insulating hard plate.
  • the conductive hard sheet is a long strip of metal that is not easily deformed. It can be regarded as the expansion of the conductive part of the terminal, which can not only increase the contact area with the tab, but also is not easily deformed, making the connection between the terminal and the tab stable. More reliable, the combination of the insulating hard plate and the conductive hard sheet is beneficial to improve the reliability of the electrical connection between the terminal and the cell tab, so as to meet the design requirements of cell sampling.
  • FIG. 1 is a schematic structural diagram of an interconnection according to a first embodiment of the present application
  • Fig. 2 is a partial enlarged schematic view of the interconnect shown in Fig. 1 in the region where the terminals are located;
  • FIG. 3 is a schematic view of the rear structure of the interconnect shown in FIG. 1 in the area where the terminals are located;
  • FIG. 4 is a schematic structural diagram of a battery pack according to an embodiment of the present application.
  • FIG. 5 is a schematic exploded view of the structure of the battery pack shown in FIG. 4;
  • FIG. 6 is a schematic structural diagram of an interconnection according to a second embodiment of the present application.
  • Fig. 7 is the structural representation when the connector shown in Fig. 6 is not connected with the main cable;
  • FIG. 8 is a schematic structural diagram of one end of the main cable facing the connector shown in FIG. 7 .
  • the flexible flat cable is relatively soft, and the structural strength is low, resulting in low reliability of the electrical connection between its terminals and the cell tabs, and it is difficult to meet the design requirements for cell sampling.
  • the embodiment of the present application provides an interconnection, in which the terminals of the flexible flat cable are relatively fixed on the insulating hard plate, and the weak part of the flexible flat cable (for example, the area where the terminal is located) is structurally reinforced by the insulating hard plate, so as to improve the strength of the terminal. The reliability of the electrical connection to the cell tabs.
  • FIG. 1 is a schematic structural diagram of an interconnection according to a first embodiment of the present application.
  • the interconnect 10 includes a flexible flat cable 11 , a connector 12 and an insulating hard board 13 .
  • the flexible flat cable 11 includes a main cable 111 and several terminals 112 .
  • the main cable 111 can be arranged in a long strip shape, and has a plurality of wires, such as copper wires with strong conductivity.
  • a plurality of terminals 112 are branched from one end of the main cable 111 and may be located on opposite sides of the main cable 111 , and each terminal 112 is electrically connected to at least one line of the main cable 111 .
  • each terminal 112 includes a branch portion 112a and a gold finger (Pin) 112b.
  • the branch portion 112a is formed by branching off one end of the main cable 111 and folded toward the side.
  • the golden fingers 112b protrude from the branch portion 112a, and are electrically connected to the wiring of the main cable 111 through the branch portion 112a.
  • the number of terminals 112 may be the same as the number of tabs of the battery module, and each terminal 112 is electrically connected to one of the tabs of the battery module during cell sampling.
  • the terminals 112 are fixed relative to the side surface of the insulating hard board 13 .
  • the terminals 112 can be fixed on one side surface of the insulating hard board 13 .
  • the insulating hard board 13 is a long strip-shaped board with high structural strength (which can be understood as the ability to shape the structural posture) and is not easily deformed, specifically including but not limited to a polycarbonate (Polycarbonate Board, PC) board.
  • the width of the insulating hard plate 13 may be equal to the width of the main cable 111 , and its structural strength is greater than that of the main cable 111 .
  • the insulating rigid plate 13 can be regarded as an extension of the main cable 111 .
  • the connector 12 is provided at the other end of the main cable 111 .
  • the connector 12 is provided with a plurality of gold fingers (Pin) 12a, and each of the gold fingers 12a is electrically connected to each wire of the main cable 111 .
  • the terminal 112 of the flexible flat cable 11 is electrically connected to the tab of the battery module, and the gold finger 12a of the connector 12 is electrically connected to the battery protection board.
  • the flexible flat cable 11 is electrically connected to the battery module and the battery protection board, which is also called a battery management system (BMS) board, which can sample the voltage or current of the battery module, and make it according to the Corresponding control strategies are adopted for the sampling results to ensure the safe operation of the battery module.
  • BMS battery management system
  • the terminal 112 of the flexible flat cable 11 is relatively fixed to the side surface of the insulating rigid board 13 , and the structural strength of the weak part of the flexible flat cable 11 is compensated by the insulating rigid board 13 , that is, the terminal 112 shown by the dotted line in FIG. 1 .
  • the ability to shape the structure and posture of the region is enhanced, which is beneficial to ensure the positioning of the terminal 112, and can improve the reliability of the electrical connection between the terminal 112 and the cell tabs, thereby meeting the design requirements for cell sampling.
  • adhesive can be provided on one side of the insulating hard board 13, and one end of the main cable 111 is pasted and fixed on the insulating hard board 13 through the adhesive.
  • the terminal 112 is used as a branch of the main cable 111, and the setting of the glue can increase the connection firmness of the terminal 112 and the main cable 111.
  • the tensile force that a single branch can withstand is about 30 N, but in the present application In an embodiment, the tensile force that a single branch can withstand can be increased by 5 to 10 times.
  • the interconnect 10 further includes a plurality of conductive hard sheets 14 .
  • the number of the conductive hard sheets 14 may be the same as the number of the terminals 112 and the number of the tabs of the battery module.
  • a terminal 112 is fixed with a conductive hard sheet 14 .
  • the positional arrangement of these conductive hard sheets 14 relative to the main cable 111 should be adaptively designed according to the positions of the tabs 311 of the battery core 31 .
  • the conductive hard sheets 14 can be arranged on both sides of the insulating hard board 13 in sequence.
  • a conductive hard sheet 14 is fixed to a tab 311 of the battery module 30 so that a terminal 112 passes through a
  • the conductive hard sheet 14 is electrically connected to one tab 311 of the battery module 30, and the gold finger 12a of the connector 12 is electrically connected to the battery protection board (not shown).
  • the flexible flat cable 11 is electrically connected to each cell 31 of the battery module 30 and the battery protection board, and the battery protection board samples the voltage and other information of each cell 31, and adopts corresponding control strategies according to the sampling results to ensure that Safe operation of the battery module 30 .
  • the conductive hard sheet 14 is a long metal sheet with high structural strength and is not easily deformed, such as a nickel sheet. , so that the connection stability between the terminal 112 and the tab 311 is more reliable, thereby further ensuring that the design requirements for cell sampling are met.
  • One end of the conductive hard plate 14 can be fixed on the insulating hard plate 13 by adhesive.
  • the gold fingers 112b of the terminal 112 are fixed on the conductive hard plate 14, so as to realize the connection between the terminal 112 and the insulating hard plate 13. fixed.
  • the terminals 112 and the conductive hard sheet 14 can be fixed in an adaptive manner, for example, as shown in FIG.
  • the connection is a weak point, and the insulating sealant 15 can enhance the connection reliability of the connection.
  • the outer side of the flexible flat cable 11 is covered with an outer film to protect the inner circuit, and the terminal 112 is used as a branch of the main cable 111.
  • the branch portion 112a shown in FIG. 1 and FIG. 2 Please refer to the branch portion 112a shown in FIG. 1 and FIG. 2, and the outer side is also provided with Therefore, a part of the outer film in the area of the terminal 112 (ie, a part of the branch portion 112a) is overlapped on the conductive hard sheet 14, and the insulating sealant 15 also wraps the outer surface of the connection between the terminal 112 and the conductive hard sheet 14. Therefore, the structural strength of the connection can be improved, so that the structural strength of the connection is greater than that of the flexible flat cable 11 itself, thereby enhancing the connection reliability of the connection.
  • the insulating hard board 13 is further provided with an alignment mark 131 for positioning when the interconnecting member 10 is electrically connected to the battery module 30 .
  • the alignment mark 131 may be at least one notch formed on the side of the insulating hard plate 13 , for example, two notches formed on the same side of the insulating hard plate 13 .
  • a terminal 112 and a conductive hard sheet 14 may be disposed between the two notches.
  • Two positioning posts are provided in the cell slot of the battery module 30. When the two positioning posts are respectively clamped in the two notches, it means that each conductive hard sheet 14 (and the terminals 112 connected to it) is connected to the electrical
  • Each tab 311 of the core 31 is aligned, and then the conductive hard sheet 14 and the tab 311 are fixed by laser welding.
  • the battery pack includes a battery module 30 , a battery protection board (not shown), and the interconnection member 10 of any of the above embodiments, and the battery is electrically connected through the interconnection member 10
  • the battery cell 31 and the battery protection board of the module 30 are also provided with a casing 32 and a plurality of battery cells 31 .
  • the casing 32 encloses the shape of the battery module 30 and defines its appearance.
  • the casing 32 is formed with a cell slot, and the internal components of the battery module 30 (for example, a plurality of cells 31 ) are built in the cell slot, and the casing 32 is used to protect the components in the battery module 30 , which can improve the protection against electricity.
  • the protective effect of the core 31 ensures the safety of the battery module 30 .
  • the number of the battery cells 31 may be determined according to the design requirements of the battery pack, which is not limited herein.
  • the cells 31 are accommodated in the cell slots of the casing 32, for example, they are arranged in the cell slots in sequence along the first direction x indicated by the arrows in FIG. 5 .
  • These cells 31 are combined in series or in parallel to form an effective power supply and/or charging unit of the battery pack.
  • These cells 31 include, but are not limited to, soft-wrapped cells, and the structures may be completely the same. Some descriptions herein take a single cell 31 as an example.
  • One end (the left end shown in FIG. 5 ) of the battery cell 31 has a tab 311 , including a positive tab and a negative tab.
  • One end of the interconnect 10 is inserted between the left end of the cell 31 and the slot wall of the cell slot, and the insulating hard plate 13 compensates for the structural strength of the flexible flat cable 11 in the area where the terminal 112 is located, which is beneficial to ensure the terminal 112
  • a conductive hard piece 14 is fixed and electrically connected to a tab 311 of the cell 31, thereby realizing the electrical connection between the terminal 112 and the tab 311 of the cell 31, in addition, the gold finger 12a of the connector 12 is connected to the battery protection Board electrical connection.
  • the flexible flat cable 11 is electrically connected to the battery module 30 and the battery protection board, and the battery protection board samples the information such as the voltage or current of the battery module 30, and adopts corresponding control strategies according to the sampling results to ensure that the battery module 30 and the safe operation of the battery pack.
  • the flexible flat cable 11 is usually very thin. At the connection with the connector 12, as shown in FIG. 7 and FIG. The increase in internal resistance results in inaccurate information such as voltage and/or current collected, which affects the sampling and control of the battery pack.
  • the battery pack can protect the structural connection here by fixing glue.
  • the fixing glue can be dispensed on the battery protection board and wrap the connection between the connector 12 and the battery protection board.
  • the fixing glue can protect the gold fingers 11a connecting the flexible flat cable 11 and the connector 12, and can also protect the gold fingers 12a connecting the connector 12 and the battery protection board, so as to prevent the gold fingers at these two places from being oxidized and corroded due to exposure. It can protect other electrical devices at the connection, and enhance the structural strength and connection reliability of the connection. According to actual experimental data, the tensile force that the connection can withstand can be increased by 5 to 10 times.
  • the battery pack is further provided with a potting glue 33 .
  • the side of the battery cell 31 with the tabs 311 is arranged opposite to the groove wall of the battery cell slot, so as to form a potting area, and the insulating hard plate 13 and several terminals 112 are located in the potting area.
  • the potting glue 33 not only encapsulates and protects all the cells 31 , but is also poured into the potting area, so that the weak areas of the flexible flat cable 11 are all wrapped by the potting glue 33 .
  • the weak area of the flexible flat cable 11 is further structurally reinforced by the potting glue 33, which is beneficial to improve the reliability of the electrical connection between the terminal 112 and the tab 311, so as to meet the sampling design requirements of the cell 31. .
  • the design of the potting glue 33 enables the structural elements at the side end of each cell 31, such as the tab 311 or the package side of the soft-wrapped cell 31, to be covered, thereby realizing the safety of the side end of the cell 31. Protection, avoid corrosion and reduce safety risks.
  • Yet another embodiment of the present application provides an electrical device, where the electrical device includes the battery pack of any of the foregoing embodiments.
  • Electrical equipment can be implemented in various specific forms, for example, in practical application scenarios, the electrical equipment includes but is not limited to power tools, drones, electric vehicles, electric cleaning tools, energy storage products, electric vehicles, Electronic products such as electric bicycles and electric navigation tools.
  • the electrical device has the battery pack of any of the foregoing embodiments, the electrical device can produce the beneficial effects of the battery pack of the corresponding embodiment.
  • an element defined by the phrase "comprises a" does not preclude the presence of additional identical elements in a process, method, article, or device that includes the element, and further, in different embodiments Components, features and elements with the same name may have the same meaning or may have different meanings, and their specific meanings need to be determined by their explanations in this specific embodiment or further combined with the context in this specific embodiment.

Abstract

本申请公开一种互连件和电池包、用电设备。该互连件包括柔性扁平电缆、绝缘硬板和连接器，柔性扁平电缆包括主电缆和若干端子，若干端子从主电缆的一端分支并固定于绝缘硬板上，每一端子与主电缆的至少一走线电连接，且与电芯的极耳电连接；连接器设置于主电缆的另一端，并电连接电池保护板和柔性扁平电缆的主电缆。本申请通过绝缘硬板对柔性扁平电缆的薄弱区域进行结构补强，有利于提高端子与电芯极耳的电连接可靠性，满足电芯采样设计需求。

Description

互连件和电池包、用电设备 技术领域
本申请涉及软包电池的采样设计技术领域，具体涉及一种互连件及具有该互连件的电池包和用电设备。
背景技术
电池包通常包括多个串联或并联的电芯(又称电池单体)，在一些电芯中发生的过电压、过电流或过热等可能不利地影响到电池包的安全性和操作效率，因此，对电芯的电压或电流等信息进行采样，并根据采样结果采取相应的控制策略，显得十分必要。
为节约空间、降低重量及成本，对于采用软包电芯的电池包，当前一般采用柔性扁平电缆(Flexible Flat Cable,FFC)与各个电芯电连接并进行采样。但是，柔性扁平电缆较软，其结构强度难以满足采样设计需求，例如，柔性扁平电缆的端子所在区域较为柔软，结构姿态的定型能力较差，导致端子与电芯极耳的电连接的可靠性较低。
技术问题
柔性扁平电缆的端子与电芯极耳之间的电连接可靠性低。
技术解决方案
本申请第一方面提供一种互连件，用于电连接电池保护板和电池模组。该互连件包括柔性扁平电缆、绝缘硬板和连接器。柔性扁平电缆包括主电缆和若干端子，若干端子从主电缆的一端分支，每一端子与主电缆的至少一走线电连接，且与电池模组的电芯的极耳电连接。若干端子与绝缘硬板的侧面相对固定。连接器设置于主电缆的另一端，并电连接柔性扁平电缆的主电缆和电池保护板。
互连件将柔性扁平电缆的端子相对固定于绝缘硬板上，通过绝缘硬板对柔性扁平电缆的薄弱区域(即端子所在区域)进行结构补强，有利于提高端子与电芯 极耳的电连接可靠性，从而能够满足电芯采样设计需求。
其中，互连件还包括若干导电硬片，一个导电硬片连接一个端子和所述电池模组的一个极耳。导电硬片为不易形变的长条状金属片，可视为端子的导电部分的扩展，不仅能够增大与极耳的接触面积，而且其不易形变，使得端子与极耳之间的连接稳定性更加可靠，进一步确保满足电芯采样设计需求。
其中，绝缘硬板的一侧面上设置有粘胶，各个导电硬片的一端和主电缆的一端分别通过粘胶黏贴于绝缘硬板的一侧面上。
其中，互连件还包括绝缘封胶，包裹端子与导电硬片的连接处。
其中，端子的外侧设置有外包膜，绝缘封胶包裹端子与导电硬片连接处的外包膜。
其中，绝缘硬板还设置有对位标识，用于在互连件电连接电池包时予以定位。
其中，对位标识包括开设于绝缘硬板的侧边的至少一缺口。
本申请第二方面提供一种电池包，包括电池模组、电池保护板，以及上述任一项所述的互连件，互连件电连接电池模组和电池保护板。
电池包采用前述互连件，将柔性扁平电缆的端子相对固定于绝缘硬板上，通过绝缘硬板对柔性扁平电缆的薄弱区域(即端子所在区域)进行结构补强，有利于提高端子与电池模组的电芯极耳的电连接可靠性，从而能够满足电池包的电芯采样设计需求。
其中，电池包还包括固定胶，该固定胶包裹连接器与电池保护板的连接处。
其中，电池包还包括外壳和灌封胶，外壳形成有电芯槽，电芯容纳于电芯槽内，电芯设置有极耳的一侧与电芯槽的槽壁之间设置有灌封区，绝缘硬板和若干端子位于所述灌封区内，灌封胶填充灌封区，并包裹所述绝缘硬板和若干端子。
本申请第三方面提供一种用电设备，包括电池包和负载。电池包用于为负载供电，电池包包括电池模组和互连件，互连件用于电连接电池模组的电芯和电池保护板。互连件包括柔性扁平电缆、绝缘硬板和连接器。柔性扁平电缆包 括主电缆和若干端子，若干端子从主电缆的一端分支，每一端子与主电缆的至少一走线电连接，且与电池模组的电芯的极耳电连接。若干端子与绝缘硬板的侧面相对固定。连接器设置于主电缆的另一端，并电连接柔性扁平电缆的主电缆和电池保护板。
用电设备采用前述互连件，将柔性扁平电缆的端子相对固定于绝缘硬板上，通过绝缘硬板对柔性扁平电缆的薄弱区域(即端子所在区域)进行结构补强，有利于提高端子与电芯极耳的电连接可靠性，从而能够满足电芯采样设计需求。
其中，互连件还包括若干导电硬片，一个导电硬片连接一个端子和电池模组的一个极耳。
其中，用电设备包括电动工具、或无人机、或电动车、或电动清洁工具、或储能产品。
其中，绝缘硬板的一侧面上设置有粘胶，各个导电硬片的一端和主电缆的一端分别通过粘胶黏贴于绝缘硬板的一侧面上。
其中，互连件还包括绝缘封胶，绝缘封胶包裹端子与导电硬片的连接处。
有益效果
本申请将柔性扁平电缆的端子相对固定于绝缘硬板上，通过绝缘硬板对柔性扁平电缆的薄弱区域(即端子所在区域)进行结构补强，另外，通过导电硬片连接端子和极耳，导电硬片为不易形变的长条状金属片，可视为端子的导电部分的扩展，不仅能够增大与极耳的接触面积，而且其不易形变，使得端子与极耳之间的连接稳定性更加可靠，绝缘硬板和导电硬片相结合有利于提高端子与电芯极耳的电连接可靠性，从而能够满足电芯采样设计需求。
附图说明
图1是本申请第一实施例的互连件的结构示意图；
图2是图1所示的互连件在端子所在区域的局部放大示意图；
图3是图1所示的互连件在端子所在区域的背面结构示意图；
图4是本申请一实施例的电池包的结构示意图；
图5是图4所示的电池包的结构爆炸示意图；
图6是本申请第二实施例的互连件的结构示意图；
图7是图6所示的连接器与主电缆未连接时的结构示意图；
图8是图7所示的主电缆朝向连接器一端的结构示意图。
本发明的实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合具体实施例及相应的附图，对本申请技术方案进行清楚、完整地描述。显然，所描述实施例仅是本申请一部分实施例，而非全部。基于本申请中的实施例，在不冲突的情况下，下述各个实施例及其技术特征可以相互组合。
应理解，在本申请实施例的描述中，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请相应实施例的技术方案和简化描述，而非指示或暗示装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
考虑到现有的电池模组中，柔性扁平电缆较软，结构强度低导致其端子与电芯极耳的电连接可靠性低，难以满足电芯采样设计需求。本申请实施例提供一种互连件，将柔性扁平电缆的端子相对固定于绝缘硬板上，通过绝缘硬板对柔性扁平电缆的薄弱部分(例如端子所在区域)进行结构补强，来提高端子与电芯极耳的电连接可靠性。
图1是本申请第一实施例的互连件的结构示意图。请参阅图1，互连件10包括柔性扁平电缆11、连接器12以及绝缘硬板13。
柔性扁平电缆11包括主电缆111和若干端子112。主电缆111可以呈长条状设置，其内部具有多根走线，例如导电性强的铜线。若干端子112从主电缆111的一端分支，可以分设于主电缆111的相对两侧，每一端子112与主电缆111的至少一走线电连接。
结合图1和图2所示，每一端子112包括分支部112a和金手指(Pin)112b。分支部112a为主电缆111的一端分支，并朝向侧方翻折而成。金手指112b外伸于分支部112a，并经由分支部112a与主电缆111的走线电连接。
端子112的数量可以与电池模组的极耳的数量相同，在电芯采样时，每一端子112与电池模组的一极耳电连接。
这些端子112与绝缘硬板13的侧面相对固定，在一实施方式中，这些端子112可以固定于绝缘硬板13的一个侧面上。绝缘硬板13为结构强度(可理解为结构姿态的定型能力)较大且不易形变的长条状板体，具体包括但不限于为聚碳酸酯(Polycarbonate Board,PC)板。
结合图3所示，绝缘硬板13的宽度可以等于主电缆111的宽度，其结构强度大于主电缆111的结构强度。于此，绝缘硬板13可视为主电缆111的延伸部，当端子112固定于绝缘硬板13上时，柔性扁平电缆11的端子112所在区域的结构强度通过绝缘硬板13得以加强。
连接器12设置于主电缆111的另一端。连接器12设置有多个金手指(Pin)12a，每一金手指12a与主电缆111的每一根走线电连接。
在对电池模组的电压或电流等信息进行采样的场景中，柔性扁平电缆11的端子112与电池模组的极耳电连接，连接器12的金手指12a与电池保护板电连接。由此，柔性扁平电缆11电连接电池模组和电池保护板，电池保护板又称电池管理系统(Battery management system,BMS)板，可以对电池模组的电压或电流等信息进行采样，并根据采样结果采取相应的控制策略，以确保电池模组的安全运行。
本申请实施例将柔性扁平电缆11的端子112相对固定于绝缘硬板13的侧面，通过绝缘硬板13弥补了柔性扁平电缆11的薄弱部分的结构强度，即图1中虚线所示的端子112所在区域的结构姿态的定型能力得以加强，有利于确保端子112的定位，能够提高端子112与电芯极耳的电连接的可靠性，从而满足电芯采样设计需求。
在前述描述基础上，绝缘硬板13的一侧面上可以设置粘胶，主电缆111的 一端通过粘胶黏贴并固定于绝缘硬板13上。
在运输及安装过程中，端子112所在区域不会发生形变，端子112在绝缘硬板13上的位置也不会发生改变。并且，端子112作为主电缆111的分支，粘胶的设置可以增大端子112与主电缆111的连接牢固性，例如，现有技术中单个分支可承受的拉力为30牛左右，而在本申请实施例中，单个分支可承受的拉力可提高5至10倍。
请继续参阅图1和图2，互连件10还包括若干导电硬片14。导电硬片14的数量可以与端子112的数量相同，并且与电池模组的极耳的数量相同。一个端子112固定与一个导电硬片14固定。
这些导电硬片14相对于主电缆111的位置排布，应当根据电芯31的极耳311的位置进行适应性设计。结合图1、图2、图4和图5所示，这些导电硬片14可以依次排布于绝缘硬板13的两侧。
在对电池模组的电压等信息进行采样的场景中，请一并结合图4和图5所示，一个导电硬片14与电池模组30的一个极耳311固定，使得一个端子112通过一个导电硬片14与电池模组30的一个极耳311电连接，连接器12的金手指12a与电池保护板(图未示出)电连接。
由此，柔性扁平电缆11电连接电池模组30的各个电芯31和电池保护板，电池保护板对各个电芯31的电压等信息进行采样，并根据采样结果采取相应的控制策略，以确保电池模组30的安全运行。
导电硬片14为结构强度较大且不易形变的长条状金属片，例如镍片，可视为端子111的导电部分的扩展，不仅能够增大与极耳311的接触面积，而且其不易形变，使得端子112与极耳311之间的连接稳定性更加可靠，从而进一步确保满足电芯采样设计需求。
导电硬片14的一端可以通过粘胶固定于绝缘硬板13上，请参阅图2所示，端子112的金手指112b固定于导电硬片14上，以此实现端子112与绝缘硬板13的固定。
端子112与导电硬片14可采用适应性方式予以固定，例如，如图6所示， 通过绝缘封胶15包裹端子112与导电硬片14连接处。该连接处为薄弱点，绝缘封胶15可增强该连接处的连接可靠性。
通常来说，柔性扁平电缆11的外侧包覆有用以保护内部线路的外包膜，端子112作为主电缆111的分支，可参阅图1和图2所示的分支部112a，其外侧也设有外包膜，因此，将端子112区域的外包膜的一部分(即分支部112a的一部分)搭接至导电硬片14上，绝缘封胶15还包裹端子112与导电硬片14连接处的外包膜，由此可以提高该连接处的结构强度，使得该连接处的结构强度大于柔性扁平电缆11自身的结构强度，从而增强该连接处的连接可靠性。
请一并参阅图1、图2、图5和图6，绝缘硬板13还设置有对位标识131，用于在互连件10电连接电池模组30时予以定位。
在一实现中，对位标识131可以为开设于绝缘硬板13的侧边的至少一缺口，例如，为开设于绝缘硬板13同一侧的两个缺口。这两个缺口之间可以设置有端子112和导电硬片14。电池模组30的电芯槽中设置有两个定位柱，当这两个定位柱分别对应卡置于两个缺口中时，表示每一导电硬片14(及与其连接的端子112)与电芯31的每一极耳311对准，然后激光焊接固定导电硬片14和极耳311。
本申请再一实施例提供一种电池包。请继续参阅图4和图5所示，电池包包括电池模组30、电池保护板(图未示出)、以及上述任一实施例的互连件10，并通过互连件10电连接电池模组30的电芯31和电池保护板，电池模组30还外壳32和若干电芯31。
外壳32围设形成电池模组30的形状，并限定其外观。该外壳32形成有电芯槽，电池模组30的内部元件(例如若干电芯31)被内置于电芯槽中，利用外壳32对电池模组30内的元器件进行保护，能够提高对电芯31的防护效果，确保电池模组30的安全性。
电芯31的数量可以根据电池包的电量设计需求而定，本文不予以限制。这些电芯31容纳于外壳32的电芯槽内，例如沿图5中箭头所示的第一方向x依次间隔设置于电芯槽内。
这些电芯31通过串联或者并联，组合成电池包的有效供电和/或充电单元。 这些电芯31包括但不限于为软包电芯，结构可以完全相同，本文某些描述之处以单个电芯31为例阐述。电芯31的一端(图5所示的左侧端)具有极耳311，包括正极极耳和负极极耳。
互连件10的一端插置于电芯31的左侧端与电芯槽的槽壁之间，绝缘硬板13弥补了柔性扁平电缆11在端子112所在区域的结构强度，有利于确保端子112的定位，一个导电硬片14与电芯31的一个极耳311固定并电连接，由此实现端子112与电芯31的极耳311电连接，另外，连接器12的金手指12a与电池保护板电连接。
由此，柔性扁平电缆11电连接电池模组30和电池保护板，电池保护板对电池模组30的电压或电流等信息进行采样，并根据采样结果采取相应的控制策略，以确保电池模组30及电池包的安全运行。
柔性扁平电缆11通常非常薄，在与连接器12连接处，一并结合图7和图8所示，柔性扁平电缆11的金手指11a非常容易氧化和腐蚀，从而导致其与连接器12处的内阻变大，导致采集得到的电压和/或电流等信息不准确，影响对电池包的采样及控制。对此，电池包可以通过固定胶来保护此处的结构连接。
固定胶可以点胶于电池保护板上，并包裹连接器12与电池保护板的连接处。固定胶可以保护柔性扁平电缆11与连接器12连接的金手指11a，也可以保护连接器12与电池保护板连接的金手指12a，避免这两处的金手指因外露而被氧化和腐蚀，还可以保护该连接处的其他电器件，并且增强该连接处的结构强度和连接可靠性，通过实际实验数据可知，该连接处可承受的拉力可以提高5至10倍。
请继续参阅图4和图5所示，电池包还设置有灌封胶33。电芯31设有极耳311的一侧与电芯槽的槽壁相对间隔设置，以此形成灌封区，绝缘硬板13和若干端子112位于该灌封区内，对此，灌封胶33不仅封装保护所有电芯31，而且灌注于该灌封区内，从而使得柔性扁平电缆11的薄弱区域全部被灌封胶33包裹。
基于此，本申请实施例通过灌封胶33进一步对柔性扁平电缆11的薄弱区 域进行结构补强，有利于提高端子112与极耳311的电连接可靠性，从而能够满足电芯31采样设计需求。
并且，灌封胶33的设计使得各电芯31在侧端部的结构元件，例如极耳311或者软包电芯31的封装侧边，得以覆盖，从而实现对电芯31侧端部的安全保护，避免腐蚀，降低安全风险。
本申请又一实施例提供一种用电设备，该用电设备包括上述任一实施例的电池包。用电设备可以以各种具体形式来实施，例如，在实际应用场景中，该用电设备包括但不限于为电动工具、无人机、电动车、电动清洁工具、储能产品、电动汽车、电动自行车、电动导航工具等电子产品。
本领域技术人员可理解的是，除了特别用于移动目的的元件之外，根据本申请实施例的构造也能够应用于固定类型的用电设备。
由于用电设备具有前述任一实施例的电池包，因此，该用电设备能够产生对应实施例的电池包具有的有益效果。
以上所述仅为本申请的部分实施例，并非因此限制本申请的专利范围，凡是利用本说明书及附图内容所作的等效结构变换，均同理包括在本申请的专利保护范围内。
在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素，此外，不同实施例中具有同样命名的部件、特征、要素可能具有相同含义，也可能具有不同含义，其具体含义需以其在该具体实施例中的解释或者进一步结合该具体实施例中上下文进行确定。
另外，尽管本文采用术语“第一、第二、第三”等描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。本文中所使用的，单数形式“一”、“一个”和“该”旨在也包括复数形式。术语“或”和“和/或”被解释为包括性的，或意味着任一个或任何组合。。仅当元件、功能、步骤或操作的组合在某些方式下内在地互相排斥时，才会出现该定义的例外。

Claims (20)

  1. 一种互连件，用于电连接电池保护板和电池模组，包括：
    柔性扁平电缆，包括主电缆和若干端子，所述若干端子从所述主电缆的一端分支，每一所述端子与所述主电缆的至少一走线电连接，且与所述电池模组的电芯的极耳电连接；
    绝缘硬板，所述若干端子与所述绝缘硬板的侧面相对固定；
    连接器，设置于所述主电缆的另一端，并电连接所述柔性扁平电缆的主电缆和所述电池保护板。
  2. 根据权利要求1所述的互连件，其中，所述互连件还包括若干导电硬片，一个导电硬片连接一个端子和所述电池模组的一个极耳。
  3. 根据权利要求2所述的互连件，其中，所述绝缘硬板的一侧面上设置有粘胶，各个所述导电硬片的一端和所述主电缆的一端分别通过所述粘胶黏贴于所述绝缘硬板的一侧面上。
  4. 根据权利要求2所述的互连件，其中，所述互连件还包括绝缘封胶，所述绝缘封胶包裹所述端子与所述导电硬片的连接处。
  5. 根据权利要求4所述的互连件，其中，所述端子的外侧设置有外包膜，所述绝缘封胶包裹所述端子与导电硬片连接处的外包膜。
  6. 根据权利要求1所述的互连件，其中，所述绝缘硬板还设置有对位标识，用于在所述互连件电连接所述电池模组时予以定位。
  7. 根据权利要求6所述的互连件，其中，所述对位标识包括开设于所述绝缘硬板的侧边的至少一缺口。
  8. 一种电池包，包括电池模组、电池保护板、以及互连件，所述互连件电连接所述电池模组和电池保护板，所述互连件包括：
    柔性扁平电缆，包括主电缆和若干端子，所述若干端子从所述主电缆的一端分支，每一所述端子与所述主电缆的至少一走线电连接，且与所述电池模组的电芯的极耳电连接；
    绝缘硬板，所述若干端子与所述绝缘硬板的侧面相对固定；
    连接器，设置于所述主电缆的另一端，并电连接所述柔性扁平电缆的主电缆和所述电池保护板。
  9. 根据权利要求8所述的互连件，其中，所述互连件还包括若干导电硬片，一个导电硬片连接一个端子和所述电池模组的一个极耳。
  10. 根据权利要求9所述的互连件，其中，所述绝缘硬板的一侧面上设置有粘胶，各个所述导电硬片的一端和所述主电缆的一端分别通过所述粘胶黏贴于所述绝缘硬板的一侧面上。
  11. 根据权利要求9所述的互连件，其中，所述互连件还包括绝缘封胶，所述绝缘封胶包裹所述端子与所述导电硬片的连接处。
  12. 根据权利要求11所述的互连件，其中，所述端子的外侧设置有外包膜，所述绝缘封胶包裹所述端子与导电硬片连接处的外包膜。
  13. 根据权利要求8所述的互连件，其中，所述绝缘硬板还设置有对位标识，用于在所述互连件电连接所述电池模组时予以定位。
  14. 根据权利要求8所述的电池包，其中，所述电池包还包括固定胶，所述固定胶包裹所述连接器与所述电池保护板的连接处。
  15. 根据权利要求8所述的电池包，其中，所述电池包还包括外壳和灌封胶，所述外壳形成有电芯槽，所述电芯容纳于所述电芯槽内，所述电芯设置有极耳的一侧与所述电芯槽的槽壁之间设置有灌封区，所述绝缘硬板和所述若干端子位于所述灌封区内，所述灌封胶填充所述灌封区，并包裹所述绝缘硬板和所述若干端子。
  16. 一种用电设备，包括
    电池包和负载，所述电池包用于为负载供电；
    所述电池包包括电池模组、电池保护板和互连件，所述互连件用于电连接所述电池模组的电芯和电池保护板，所述互连件包括：
    柔性扁平电缆，包括主电缆和若干端子，所述若干端子从所述主电缆的一端分支，每一所述端子与所述主电缆的至少一走线电连接，且与所述电池模组 的电芯的极耳电连接；
    绝缘硬板，所述若干端子与所述绝缘硬板的侧面相对固定；
    连接器，设置于所述主电缆的另一端，并电连接所述柔性扁平电缆的主电缆和所述电池保护板。
  17. 根据权利要求16所述的用电设备，其中，所述互连件还包括若干导电硬片，一个导电硬片连接一个端子和所述电池模组的一个极耳。
  18. 根据权利要求16所述的用电设备，其中，所述用电设备包括电动工具、或无人机、或电动车、或电动清洁工具、或储能产品。
  19. 根据权利要求17所述的用电设备，其中，所述绝缘硬板的一侧面上设置有粘胶，各个所述导电硬片的一端和所述主电缆的一端分别通过所述粘胶黏贴于所述绝缘硬板的一侧面上。
  20. 根据权利要求17所述的用电设备，其中，所述互连件还包括绝缘封胶，所述绝缘封胶包裹所述端子与所述导电硬片的连接处。
PCT/CN2020/133108 2020-12-01 2020-12-01 互连件和电池包、用电设备 WO2022115995A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2020/133108 WO2022115995A1 (zh) 2020-12-01 2020-12-01 互连件和电池包、用电设备
CN202080024746.XA CN114946069A (zh) 2020-12-01 2020-12-01 互连件和电池包、用电设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/133108 WO2022115995A1 (zh) 2020-12-01 2020-12-01 互连件和电池包、用电设备

Publications (1)

Publication Number Publication Date
WO2022115995A1 true WO2022115995A1 (zh) 2022-06-09

Family

ID=81852916

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/133108 WO2022115995A1 (zh) 2020-12-01 2020-12-01 互连件和电池包、用电设备

Country Status (2)

Country Link
CN (1) CN114946069A (zh)
WO (1) WO2022115995A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206878083U (zh) * 2017-06-23 2018-01-12 宁德时代新能源科技股份有限公司 电池模组
US20180047958A1 (en) * 2016-08-12 2018-02-15 Yazaki Corporation Bus bar module and battery pack
CN211291768U (zh) * 2020-03-04 2020-08-18 东莞新能安科技有限公司 电池组的采样结构和电池组
CN211376865U (zh) * 2020-02-11 2020-08-28 力神动力电池系统有限公司 一种动力电池模组的采样用柔性印刷电路板组件
CN211980823U (zh) * 2020-04-26 2020-11-20 湖北亿纬动力有限公司 电池模组的信号采样装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180047958A1 (en) * 2016-08-12 2018-02-15 Yazaki Corporation Bus bar module and battery pack
CN206878083U (zh) * 2017-06-23 2018-01-12 宁德时代新能源科技股份有限公司 电池模组
CN211376865U (zh) * 2020-02-11 2020-08-28 力神动力电池系统有限公司 一种动力电池模组的采样用柔性印刷电路板组件
CN211291768U (zh) * 2020-03-04 2020-08-18 东莞新能安科技有限公司 电池组的采样结构和电池组
CN211980823U (zh) * 2020-04-26 2020-11-20 湖北亿纬动力有限公司 电池模组的信号采样装置

Also Published As

Publication number Publication date
CN114946069A (zh) 2022-08-26

Similar Documents

Publication Publication Date Title
US20210104803A1 (en) Interconnecting member occupying less space in battery module and battery module comprising same
KR100733709B1 (ko) 플레이트를 포함하고 있는 전극 연결부재 및 그것을포함하는 전지모듈
US8771863B2 (en) Battery module and manufacturing method of battery module
CN102804447B (zh) 包括结构新颖的感测构件的电池模块
CN104253252A (zh) 电池模块
WO2021098586A1 (zh) 软包电池模组、电池包使用软包电池模组的设备
CN102867981A (zh) 电池包
JP2011222518A (ja) 二次電池パック
JP5825991B2 (ja) 蓄電池用の電線配索構造
CN112133876A (zh) 电池及终端设备
JP7062209B2 (ja) 電池モジュールおよびこれを含む電池パック
WO2022115995A1 (zh) 互连件和电池包、用电设备
US20240014501A1 (en) Wiring module
CN214043919U (zh) 互连件和电池包、用电设备
JP2015005483A (ja) 電池パック
KR20220042795A (ko) Ffc 버스바
JP3226836U (ja) フレキシブルフラットケーブル・アセンブリ及びバッテリー・パック接続アセンブリ
CN220042199U (zh) 电池模组和车辆
CN214043901U (zh) 一种动力电池模组
JP7325889B2 (ja) 電池モジュールおよびこれを含む電池パック
CN215732081U (zh) 电池采样装置及电池模组
JP2014191886A (ja) 分岐配線用フラットケーブル並びにこれを用いた分岐配線方法及び分岐配線構造体
US20230261332A1 (en) Wiring module
KR102509627B1 (ko) 통전용 접속 케이블 유닛
CN214254796U (zh) 连接线结构及连接线模组

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20963844

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20963844

Country of ref document: EP

Kind code of ref document: A1