WO2020134979A1 - 电池模组 - Google Patents

电池模组 Download PDF

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Publication number
WO2020134979A1
WO2020134979A1 PCT/CN2019/123694 CN2019123694W WO2020134979A1 WO 2020134979 A1 WO2020134979 A1 WO 2020134979A1 CN 2019123694 W CN2019123694 W CN 2019123694W WO 2020134979 A1 WO2020134979 A1 WO 2020134979A1
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WO
WIPO (PCT)
Prior art keywords
fpc
battery module
end plate
connector
fastener
Prior art date
Application number
PCT/CN2019/123694
Other languages
English (en)
French (fr)
Inventor
陈少镇
苏立擂
王冲
郑仁蔚
Original Assignee
宁德时代新能源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2020134979A1 publication Critical patent/WO2020134979A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/579—Devices or arrangements for the interruption of current in response to shock
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/05—Flexible printed circuits [FPCs]
    • H05K2201/056—Folded around rigid support or component
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10037—Printed or non-printed battery
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10189—Non-printed connector
    • 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 field of batteries, in particular to a battery module.
  • the low-voltage sampling of the battery of the battery module is usually performed by using a flexible printed circuit (FPC).
  • FPC flexible printed circuit
  • the FPC needs to be connected to an external device through a connector, and the FPC itself is soft. Materials, so it is necessary to add a fixing structure in the battery module to fix the connector.
  • the usual method is to add a plastic part to fix it.
  • the fixing of the added plastic parts itself is problematic, and is basically fixed above the end plate, which may exceed the maximum height of the battery module and occupy the space of the battery module; the connector and its fixed plastic
  • the end plate needs to be provided with a larger groove, which causes the end plate stress concentration, which reduces the ability of the entire battery module to withstand expansion; when the connector is subjected to vibration shock, the added plastic parts cannot effectively prevent the impact of the connector. Pass release.
  • the purpose of the present application is to provide a battery module that enables the impact to be effectively transmitted and released when the connector is impacted.
  • a battery module which includes: a plurality of batteries arranged in a longitudinal direction; an end plate provided at a longitudinal end of the plurality of batteries; FPC, FPC includes a main body portion and a curved Folded part, the main body part is located above the corresponding battery in the height direction and is electrically connected to the corresponding battery, the bent part is bent and extended from the main body part and is located under the main body part, the bent part is fixedly connected to the end plate; the connector, fixed It is connected to the bent portion of the FPC and electrically connected to the FPC.
  • the battery module further includes a connecting plate, a bending portion connecting the end plate and the FPC.
  • the connector and the connecting plate are respectively located on opposite sides of the bent portion of the FPC.
  • the end plate is provided with two protrusions protruding upward from the top of the end plate, and a receiving space is formed between the two protrusions, the main body portion and the bent portion of the FPC overlap in the height direction;
  • the connection plate is in the height direction
  • the upper part is located between the main body part and the bent part of the FPC, and the connecting plate is fixed to two protrusions;
  • the connector is located in the receiving space, and the socket of the connector faces the outside of the battery module along the length direction.
  • the battery module further includes a first fastener and a second fastener, which are located on both sides of the connector in the width direction, the connecting plate, the body portion of the FPC, the bent portion and the end of the FPC The protrusion of the board is fixed by the first fastener and the second fastener.
  • the bent portion of the FPC extends downward from the top of the end plate along the lengthwise outer surface of the end plate; the connecting plate is located between the bent portion of the FPC and the lengthwise outer surface of the end plate, and is fixed The outer surface of the end plate in the length direction; the socket of the connector is arranged along the width direction.
  • connection plate includes an exposed portion that extends downward beyond the bottom end of the bent portion of the FPC, the exposed portion is located on the lower side of the connector, and is fixed to the longitudinal outer surface of the end plate.
  • the battery module further includes a third fastener, and the exposed portion and the outer surface of the end plate are fixed by the third fastener.
  • the battery module further includes a fourth fastener, which is located on the upper side of the connector, and the outer surfaces of the connection plate, the end plate, and the bent portion of the FPC are fixed by the fourth fastener.
  • the battery module further includes a third fastener and a fourth fastener;
  • the connecting plate includes an exposed portion that extends downward beyond the bottom end of the bent portion of the FPC, and the exposed portion is located on the lower side of the connector , And is fixed to the outer surface of the end plate in the longitudinal direction by a third fastener;
  • the fourth fastener is located on the upper side of the connector, the outer surface of the connection plate, the end plate, and the bent portion of the FPC are fastened by the fourth Pieces fixed.
  • the connecting plate includes exposed portions beyond both ends in the width direction of the bent portion, the exposed portions are located on both sides in the width direction of the connector, and are fixed to the outer surface in the length direction of the end plate.
  • the connector is fixedly connected to the bent portion of the FPC, and the bent portion is fixedly connected to the end plate, so that the connector is fixed to the end plate via the FPC.
  • the FPC can be used
  • the flexible characteristics are used to deliver release shocks.
  • FIG. 1 is a perspective view of an embodiment of a battery module of the present application.
  • FIG. 2 is a perspective view of the battery module of FIG. 1 from another angle.
  • FIG. 3 is an enlarged perspective view of circle A in FIG. 2 at another angle.
  • FIG. 4 is an exploded perspective view of some components of the battery module of FIG. 1.
  • FIG. 5 is a perspective view of another embodiment of the battery module of the present application.
  • FIG. 6 is an enlarged perspective view of circle B in FIG. 5 at another angle.
  • FIG. 7 is an exploded perspective view of some components of the battery module of FIG. 4.
  • FIG. 8 is a partially enlarged perspective view of a part of components of the battery module of FIG. 4.
  • FIG. 9 is an exploded perspective view of some components of the battery module in FIG. 8.
  • the battery module of the present application includes: a plurality of batteries 1 arranged in the longitudinal direction L; an end plate 2 provided at an end of the plurality of batteries 1 in the longitudinal direction L; FPC 3, which includes a main body portion 31 and a bent portion 32.
  • the main body 31 is located above the corresponding battery 1 along the height direction H and is electrically connected to the corresponding battery 1.
  • the bent portion 32 is bent and extended from the main body 31 and is located below the main body 31, and the bent portion 32 is fixedly connected On the end plate 2; the connector 4 is fixedly connected to the bent portion 32 of the FPC 3 and electrically connected to the FPC 3.
  • the battery module further includes: a connecting plate 5, a bending portion 32 connecting the end plate 2 and the FPC 3.
  • FPC 3 is a flexible board, and the connecting board 5 serves to strengthen the hardness of FPC 3 and complement the thickness of FPC 3.
  • the material of the connection board 5 may be plastic or other insulating materials.
  • the battery 1 may be a hard case battery (or referred to as a can type battery) or a soft pack battery (or referred to as a pouch type battery).
  • the hard case battery includes an electrode assembly (not shown), a pole, an explosion-proof valve, a case, and a top cover.
  • a housing cavity is formed inside the housing to accommodate the electrode assembly and the electrolyte.
  • the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator that separates the positive electrode sheet and the negative electrode sheet.
  • the positive electrode sheet, the negative electrode sheet, and the separator may be wound and formed, or the positive electrode sheet, the negative electrode sheet, and the separator may be laminated and formed.
  • Both the positive electrode sheet and the negative electrode sheet include a current collector and an active material layer provided on the current collector.
  • the soft-pack battery includes a packaging bag (for example, formed of an aluminum-plastic film) as a battery case, an electrode assembly (similar to the configuration and molding of a hard-shell battery), and a tab. A part of the tab is enclosed in the packaging bag and another part extends out of the packaging bag. The tab can be formed directly from the pole piece or use an independent conductive material and be electrically connected to the current collector.
  • FIG. 1 is a perspective view of an embodiment of a battery module of the present application.
  • FIG. 2 is a perspective view of the battery module of FIG. 1 from another angle.
  • FIG. 3 is an enlarged perspective view of circle A in FIG. 2 at another angle.
  • 4 is an exploded perspective view of some components of the battery module of FIG. 1.
  • the bent portion 32 of the FPC 3 extends downward from the top of the end plate 2 along the outer surface 22 of the length direction L of the end plate 2, and the connecting plate 5 is located at the bend of the FPC 3 Between the folded portion 32 and the outer surface 22 of the end plate 2 in the longitudinal direction L, and fixed to the outer surface 22 of the end plate 2 in the longitudinal direction L, the socket 41 of the connector 4 is provided along the width direction W to save space.
  • the connecting plate 5 is connected to the bent portion 32 of the FPC 3 and fixedly connected to the outer surface 22 of the end plate 2 in the longitudinal direction L.
  • the FPC 3 is a flexible board, and the connecting plate 5 can be bonded to the bent portion 32 of the FPC 3.
  • One fixing method is that the connecting plate 5 includes an exposed portion 51 that exceeds the bent portion 32 of the FPC 3, and the outer surface 22 of the connecting plate 5 and the end plate 2 is fixed by the exposed portion 51 of the connecting plate 5 to make the bent portion of the FPC 3 32 and the outer surface 22 of the end plate 2 are fixed indirectly.
  • connection plate 5 includes an exposed portion 51 that extends downwardly beyond the bottom end of the bent portion 32 of the FPC 3, the exposed portion 51 is located on the lower side of the connector 4 and is outside the length direction L of the end plate 2
  • the surface 22 is fixed to indirectly fix the bent portion 32 of the FPC 3 and the end plate 2 through the exposed portion 51 of the connection plate 5;
  • the battery module further includes a third fastener F3, the exposed portion 51 is connected to the end plate 2
  • the outer surface 22 may be fixed by the third fastener F3.
  • connection plate 5 includes exposed portions 51 of the connection plate 5 that extend beyond both ends of the bent portion 32 in the width direction W, the exposed portions 51 are located on both sides of the connector 4 in the width direction W, and are
  • the outer surface 22 of the board 2 is fixed to indirectly fix the bent portion 32 of the FPC 3 and the end plate 2 through the exposed portion 51 of the connecting plate 5; the exposed portions 51 and the end plates on both sides of the width direction W of the connector 4
  • the outer surface 22 of 2 can also be fixed by the third fastener F3. Another fixing method is to fix the connecting plate 5, the outer surface 22 of the end plate 2 and the bent portion 32 of the FPC 3 together.
  • the battery module further includes a fourth fastener F4 located on the upper side of the connector 4, the outer surface 22 of the connection plate 5, the end plate 2, and the bent portion 32 of the FPC 3 are fastened by the fourth Pieces F4 are fixed together.
  • Another fixing method is to fix the connection plate 5 and the outer surface 22 of the end plate 2 through the exposed portion 51 of the connection plate 5 and the bent portion of the connection plate 5, the outer surface 22 of the end plate 2 and the FPC 3 32 is fixed together in a fixed manner. The following is a fixed manner in which the connecting plate 5 and the outer surface 22 of the end plate 2 are fixed by the exposed portion 51 of the bent portion 32 of the bending portion 32 of the FPC 3 downward and the connecting plate 5.
  • the battery module includes a third fastener F3 and a fourth The fastener F4, the connecting plate 5 includes an exposed portion 51 that extends downwardly beyond the bottom end of the bent portion 32 of the FPC 3, and the exposed portion 51 is located on the lower side of the connector 4 and is outside the length direction L of the end plate 2
  • the surface 22 is fixed by the third fastener F3, the fourth fastener F4 is located on the upper side of the connector 4, the outer surface 22 of the connecting plate 5, the end plate 2, and the bent portion 32 of the FPC 3 are passed by the fourth fastener F4 is fixed together.
  • the third fastener F3 and the fourth fastener F4 may be snap nails, occupying a small space and having a fixed connection.
  • a cavity 23 is formed inside the end plate 2, and the wall 231 of the cavity 23 is provided with a buckle groove G, and the buckle nail is held by the buckle groove G.
  • the end plate 2 in which the cavity 23 is formed also reduces the weight of the battery module.
  • the selection of the fixing method for fixing the bent portion 32 of the FPC 3 and the outer surface 22 of the end plate 2 through the connecting plate 5 may be determined according to specific needs.
  • the bent portion 32 of the FPC 3 is fixedly connected to the outer surface 22 of the end plate 2 without adding additional plastic parts to fix the connector 4 and occupying no additional space in the height direction of the battery module or opening on the end plate 2 Groove to avoid stress concentration on the end plate 2. Moreover, when the connector 4 is subjected to vibration shock, the flexible characteristics of the FPC 3 can be used to transmit the release shock to ensure the life of the battery module.
  • FIG. 5 is a perspective view of another embodiment of the battery module of the present application.
  • 6 is an enlarged perspective view of circle B in FIG. 5 at another angle.
  • 7 is an exploded perspective view of some components of the battery module of FIG. 4.
  • FIG. 8 is a partially enlarged perspective view of a part of components of the battery module of FIG. 4.
  • FIG. 9 is an exploded perspective view of some components of the battery module in FIG. 8.
  • the end plate 2 is provided with two protrusions 21 that protrude upward from the top of the end plate 2, and a receiving space S, a body portion 31 of the FPC 3 and a bend are formed between the two protrusions 21
  • the portion 32 overlaps in the height direction H
  • the connecting plate 5 is located between the main body portion 31 and the bent portion 32 of the FPC 3 in the height direction H
  • the connecting plate 5 is fixed to the two protrusions 21, and the connector 4 is located in the receiving space S
  • the socket 41 of the connector 4 faces the outside of the battery module along the length direction L, so that the connector 4 does not occupy extra height space of the battery module.
  • the battery module also includes a first fastener F1 and a second fastener F2, which are located on both sides of the connector 4 in the width direction W, the connecting plate 5, the body portion 31 of the FPC 3, and the bending portion of the FPC 3, respectively 32 and the protrusion 21 of the end plate 2 are fixed by the first fastener F1 and the second fastener F2.
  • the first fastener F1 and the second fastener F2 may be snap nails, the protrusion 21 of the end plate 2 is hollow inside, the top wall 211 of the protrusion 21 is provided with a snap groove G, and the snap nail is held in the snap groove G is fixed.
  • the connecting plate 5 can be adhered to the bent portion 32 and the main body portion 31 of the FPC 3.
  • the two protrusions 21 protruding upward through the top of the end plate 2 accommodate the connector 4 fixedly connected to the bent portion 32 of the FPC 3, without adding additional plastic parts to fix the connector 4, and the main body portion 31 and the bend of the FPC 3
  • the folded portion 32 overlaps in the height direction H to reduce the influence of the FPC 3 on the height of the battery module, and make full use of the flexibility of the FPC 3 to transmit the impact caused by the release of vibration conditions.
  • the connector 4 and the connection plate 5 are located on opposite sides of the bent portion 32 of the FPC 3, respectively.
  • the connector 4 can be electrically connected to the FPC 3 by welding, and the welded part of the connector 4 and the FPC 3 is covered with glue to protect the welding position from being disengaged by the impact of later vibration.
  • the connecting plate 5 can be selectively set according to the needs.
  • the connection board 5 can be eliminated, and the FPC 3 can be directly fixed by increasing the strength of the FPC 3 itself (that is, meeting the strength requirements for connection fixing) while satisfying flexibility.
  • the connector 4 is fixedly connected to the bent portion 32 of the FPC 3, and the bent portion 32 is fixedly connected to the end plate 2, so that the connector 4 is fixed to the end plate via the FPC 3 2.
  • the flexible characteristics of FPC 3 can be used to transfer and release the shock.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种电池模组，其包括：多个电池（1），沿长度方向（L）排列；端板（2），设置于多个电池（1）的长度方向（L）的端部；FPC（3），FPC（3）包括主体部（31）以及弯折部（32），主体部（31）沿高度方向（H）位于对应电池（1）的上方并与对应的电池（1）电连接，弯折部（32）从主体部（31）弯折并延伸且位于主体部（31）下侧，弯折部（32）固定连接于端板（2）；连接器（4），固定连接于FPC（3）的弯折部（32）且电连接于FPC（3）。在该电池模组中，连接器（4）固定连接于FPC（3）的弯折部（32），弯折部（32）固定连接于端板（2），从而连接器（4）经由FPC（3）固定于端板（2），当连接器（4）受到振动冲击时，可以利用FPC（3）的柔性特性来传递释放冲击。

Description

电池模组 技术领域
本申请涉及电池领域，尤其涉及一种电池模组。
背景技术
在目前的很多电池模组中，通常通过采用柔性印刷电路板(Flexible Printed Circuit，简称FPC)对电池模组的电池进行低压采样，FPC需要通过连接器连接于外部装置，而FPC本身是软性材料，所以需要在电池模组中增加固定结构来固定连接器。通常采用的方式是增加一个塑件固定。这就会导致如下不良效果：增加的塑件自身的固定存在问题，基本是固定在端板上方，有可能超出电池模组的最高高度，占用电池模组的空间；连接器及其固定的塑件需要端板设置有较大的槽，导致端板应力集中，致使整个电池模组承受膨胀的能力降低；当连接器受到振动冲击时，增加的塑件不能使连接器受到的冲击被有效地传递释放。
发明内容
鉴于现有技术存在的缺陷，本申请的目的在于提供一种电池模组，能够使连接器在受到冲击时冲击被有效地传递释放。
为了实现上述目的，本申请提供了一种电池模组，其包括：多个电池，沿长度方向排列；端板，设置于多个电池的长度方向的端部；FPC，FPC包括主体部以及弯折部，主体部沿高度方向位于对应电池的上方并与对应的电池电连接，弯折部从主体部弯折并延伸且位于主体部下侧，弯折部固定连接于端板；连接器，固定连接于FPC的弯折部且电连接于FPC。
在一实施例中，电池模组还包括连接板，连接端板和FPC的弯折部。
在一实施例中，连接器和连接板分别位于FPC的弯折部的相反的两侧。
在一实施例中，端板设置有从端板的顶部向上突出的两个突起，两个突起之间形成收容空间，FPC的主体部和弯折部在高度方向上重叠；连接板在 高度方向上位于FPC的主体部和弯折部之间，连接板固定于两个突起；连接器位于收容空间中，连接器的插接口沿长度方向朝向电池模组的外部。
在一实施例中，电池模组还包括第一紧固件和第二紧固件，分别位于连接器在宽度方向上的两侧，连接板、FPC的主体部、FPC的弯折部以及端板的突起通过第一紧固件和第二紧固件固定。
在一实施例中，FPC的弯折部从端板的顶部沿端板的长度方向的外表面向下延伸；连接板位于FPC的弯折部和端板的长度方向的外表面之间，且固定于端板的长度方向的外表面；连接器的插接口沿宽度方向设置。
在一实施例中，连接板包括向下超出FPC的弯折部的底端的外露部分，所述外露部分位于连接器的下侧，并且与端板的长度方向的外表面固定。
在一实施例中，电池模组还包括第三紧固件，所述外露部分与端板的外表面通过第三紧固件固定。
在一实施例中，电池模组还包括第四紧固件，位于连接器的上侧，连接板、端板的外表面以及FPC的弯折部通过第四紧固件固定。
在一实施例中，电池模组还包括第三紧固件和第四紧固件；连接板包括向下超出FPC的弯折部的底端的外露部分，所述外露部分位于连接器的下侧，并且与端板的长度方向的外表面通过第三紧固件固定；第四紧固件位于连接器的上侧，连接板、端板的外表面以及FPC的弯折部通过第四紧固件固定。
在一实施例中，连接板包括超出弯折部的宽度方向的两端的外露部分，所述外露部分位于连接器的宽度方向的两侧，并且与端板的长度方向的外表面固定。
本申请的有益效果如下：
在本申请的电池模组中，连接器固定连接于FPC的弯折部，弯折部固定连接于端板，从而连接器经由FPC固定于端板，当连接器受到振动冲击时，可以利用FPC的柔性特性来传递释放冲击。
附图说明
图1是本申请的电池模组的一实施例的立体图。
图2是图1的电池模组的另一角度的立体图。
图3是图2中的圆圈A的另一角度的放大立体图。
图4是图1的电池模组的部分组成部件的分解立体图。
图5是本申请的电池模组的另一实施例的立体图。
图6是图5中的圆圈B的另一角度的放大立体图。
图7是图4的电池模组的部分组成部件的分解立体图。
图8是图4的电池模组的部分组成部件的局部放大立体图。
图9是图8中的电池模组的部分组成部件的分解立体图。
其中，附图标记说明如下：
1电池      5连接板
2端板      51外露部分
21突起     6电连接片
211顶壁    G扣槽
22外表面   F1第一紧固件
23型腔     F2第二紧固件
231壁      F3第三紧固件
3 FPC      F4第四紧固件
31主体部   S收容空间
32弯折部   L长度方向
4连接器    W宽度方向
41插接口   H高度方向
具体实施方式
附图示出本申请的实施例，且将理解的是，所公开的实施例仅仅是本申请的示例，本申请可以以各种形式实施，因此，本文公开的具体细节不应被解释为限制，而是仅作为权利要求的基础且作为表示性的基础用于教导本领域普通技术人员以各种方式实施本申请。
本申请的电池模组包括：多个电池1，沿长度方向L排列；端板2，设置于多个电池1的长度方向L的端部；FPC 3，FPC 3包括主体部31以及弯折部32，主体部31沿高度方向H位于对应电池1的上方并与对应的电池1电连接，弯折部32从主体部31弯折并延伸且位于主体部31下侧，弯折部 32固定连接于端板2；连接器4，固定连接于FPC 3的弯折部32且电连接于FPC 3。电池模组还包括：连接板5，连接端板2和FPC 3的弯折部32。FPC 3为软性板，连接板5起到加强FPC 3的硬度、补足FPC 3厚度的作用。连接板5的材料可为塑胶或其它绝缘材料。
电池1可为硬壳电池(或称为罐型电池)或软包电池(或称为袋型电池)，硬壳电池包括电极组件(未示出)、极柱、防爆阀、壳体以及顶盖。壳体内部形成收容腔，以容纳电极组件和电解液。电极组件包括正极片、负极片以及将正极片和负极片间隔开的隔离膜。电极组件可以将正极片、负极片以及隔离膜卷绕成型或将正极片、负极片以及隔离膜层叠成型。正极片、负极片均包括集流体和设置在集流体上的活性物质层。软包电池包括作为电池壳体的封装袋(例如由铝塑膜形成)、电极组件(与硬壳电池的构成和成型类似)以及极耳。极耳的一部分封装在封装袋内而另一部分延伸出封装袋。极耳可以由极片直接形成或采用独立的导电材料并电连接于集流体。
FPC 3的弯折部32固定连接于端板2的固定方式有多种，包括FPC 3的弯折部32固定连接于端板2的外表面22和FPC 3的弯折部32固定连接于端板2的顶部。
下面说明FPC 3的弯折部32固定连接于端板2的外表面22的固定方式。
图1是本申请的电池模组的一实施例的立体图。图2是图1的电池模组的另一角度的立体图。图3是图2中的圆圈A的另一角度的放大立体图。图4是图1的电池模组的部分组成部件的分解立体图。
在图1至图4所示的实施例中，FPC 3的弯折部32从端板2的顶部沿端板2的长度方向L的外表面22向下延伸，连接板5位于FPC 3的弯折部32和端板2的长度方向L的外表面22之间，且固定于端板2的长度方向L的外表面22，连接器4的插接口41沿宽度方向W设置，以节省空间。
参照图1至图4，连接板5与FPC 3的弯折部32连接并且与端板2的长度方向L的外表面22固定连接。FPC 3为软性板，连接板5可粘接于FPC 3的弯折部32。通过连接板5固定FPC 3的弯折部32和端板2的外表面22的固定方式有多种。一种固定方式是连接板5包括超出FPC 3的弯折部32的外露部分51，通过连接板5的外露部分51固定连接板5和端板2的外表面22以使FPC 3的弯折部32和端板2的外表面22间接固定。在一示例中， 连接板5包括向下超出FPC 3的弯折部32的底端的外露部分51，所述外露部分51位于连接器4的下侧，并且与端板2的长度方向L的外表面22固定，以通过连接板5的外露部分51使FPC 3的弯折部32和端板2间接固定；电池模组还包括第三紧固件F3，所述外露部分51与端板2的外表面22可通过第三紧固件F3固定。在另一示例中，连接板5包括从弯折部32的宽度方向W的两端超出的连接板5的外露部分51，外露部分51位于连接器4的宽度方向W的两侧，并且与端板2的外表面22固定，以通过连接板5的外露部分51使FPC 3的弯折部32和端板2间接固定；位于连接器4的宽度方向W的两侧的外露部分51与端板2的外表面22也可通过第三紧固件F3固定。另一种固定方式是将连接板5、端板2的外表面22以及FPC 3的弯折部32一起固定。在又一示例中，电池模组还包括第四紧固件F4，位于连接器4的上侧，连接板5、端板2的外表面22以及FPC 3的弯折部32通过第四紧固件F4一起固定。还有一种固定方式是将通过连接板5的外露部分51固定连接板5和端板2的外表面22的固定方式和将连接板5、端板2的外表面22以及FPC 3的弯折部32一起固定的固定方式结合，下面以通过连接板5的向下超出FPC 3的弯折部32的底端的外露部分51固定连接板5和端板2的外表面22的固定方式和将连接板5、端板2的外表面22以及FPC 3的弯折部32一起固定的固定方式结合为例说明，如图1至图4所示，电池模组包括有第三紧固件F3和第四紧固件F4，连接板5包括向下超出FPC 3的弯折部32的底端的外露部分51，所述外露部分51位于连接器4的下侧，并且与端板2的长度方向L的外表面22通过第三紧固件F3固定，第四紧固件F4位于连接器4的上侧，连接板5、端板2的外表面22以及FPC 3的弯折部32通过第四紧固件F4一起固定。其中，第三紧固件F3和第四紧固件F4可为卡扣钉，占用空间小且固定连接稳固。对应地，端板2的内部形成有型腔23，型腔23的壁231设有扣槽G，卡扣钉扣持于扣槽G。内部形成有型腔23的端板2也减轻电池模组的重量。通过连接板5固定FPC 3的弯折部32和端板2的外表面22的固定方式的选择可依据具体需要而定。
FPC 3的弯折部32固定连接于端板2的外表面22，不需要增加额外的塑件固定连接器4，不占用电池模组额外的高度方向的空间，也无需在端板2上开槽，避免端板2发生应力集中。而且当连接器4受到振动冲击时，可 以利用FPC 3的柔性特性来传递释放冲击，以保证电池模组的寿命。
下面说明FPC 3的弯折部32固定连接于端板2的顶部的固定方式。
图5是本申请的电池模组的另一实施例的立体图。图6是图5中的圆圈B的另一角度的放大立体图。图7是图4的电池模组的部分组成部件的分解立体图。图8是图4的电池模组的部分组成部件的局部放大立体图。图9是图8中的电池模组的部分组成部件的分解立体图。
在图5至图9的实施例中，端板2设置有从端板2的顶部向上突出的两个突起21，两个突起21之间形成收容空间S，FPC 3的主体部31和弯折部32在高度方向H上重叠，连接板5在高度方向H上位于FPC 3的主体部31和弯折部32之间，连接板5固定于两个突起21，连接器4位于收容空间S中，连接器4的插接口41沿长度方向L朝向电池模组的外部，以使连接器4不占用电池模组额外的高度空间。电池模组还包括第一紧固件F1和第二紧固件F2，分别位于连接器4在宽度方向W上的两侧，连接板5、FPC 3的主体部31、FPC 3的弯折部32以及端板2的突起21通过第一紧固件F1和第二紧固件F2固定。第一紧固件F1和第二紧固件F2可为卡扣钉，端板2的突起21内部是中空的，突起21的顶壁211设有扣槽G，卡扣钉扣持于扣槽G以固定。其中，连接板5可粘接于FPC 3的弯折部32和主体部31。通过端板2的顶部向上突出的两个突起21收容固定连接于FPC 3的弯折部32的连接器4，不需要增加额外的塑件固定连接器4，并且FPC 3的主体部31和弯折部32在高度方向H上重叠以减小FPC 3对电池模组高度的影响，并且充分利用FPC 3的柔性来传递释放振动工况下所带来的冲击。
在图中所示的示例中，连接器4和连接板5分别位于FPC 3的弯折部32的相反的两侧。连接器4具体可通过焊接与FPC 3电连接，并且连接器4与FPC 3焊接的部位覆盖有胶，以保护焊接位置不会受到后期振动的影响脱开。
最后说明的是，连接板5可以根据需要选择性设置。例如，可以取消连接板5，通过在满足柔性的同时适度提高FPC 3自身的强度(即满足连接固定的强度要求)，可直接将FPC 3固定。
综上所述，在本申请的电池模组中，连接器4固定连接于FPC 3的弯折部32，弯折部32固定连接于端板2，从而连接器4经由FPC 3固定于端板2，当连接器4受到振动冲击时，可以利用FPC 3的柔性特性来传递释放冲击。
上面详细的说明描述多个示范性实施例，但本文不意欲限制到明确公开的组合。因此，除非另有说明，本文所公开的各种特征可以组合在一起而形成出于简明目的而未示出的多个另外组合。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (11)

  1. 一种电池模组，其特征在于，包括：
    多个电池(1)，沿长度方向(L)排列；
    端板(2)，设置于多个电池(1)的长度方向(L)的端部；
    FPC(3)，FPC(3)包括主体部(31)以及弯折部(32)，主体部(31)沿高度方向(H)位于对应电池(1)的上方并与对应的电池(1)电连接，弯折部(32)从主体部(31)弯折并延伸且位于主体部(31)下侧，弯折部(32)固定连接于端板(2)；
    连接器(4)，固定连接于FPC(3)的弯折部(32)且电连接于FPC(3)。
  2. 根据权利要求1所述的电池模组，其特征在于，电池模组还包括：
    连接板(5)，连接端板(2)和FPC(3)的弯折部(32)。
  3. 根据权利要求2所述的电池模组，其特征在于，连接器(4)和连接板(5)分别位于FPC(3)的弯折部(32)的相反的两侧。
  4. 根据权利要求2所述的电池模组，其特征在于，
    端板(2)设置有从端板(2)的顶部向上突出的两个突起(21)，两个突起(21)之间形成收容空间(S)，
    FPC(3)的主体部(31)和弯折部(32)在高度方向(H)上重叠；
    连接板(5)在高度方向(H)上位于FPC(3)的主体部(31)和弯折部(32)之间，连接板(5)固定于两个突起(21)；
    连接器(4)位于收容空间(S)中，连接器(4)的插接口(41)沿长度方向(L)朝向电池模组的外部。
  5. 根据权利要求4所述的电池模组，其特征在于，电池模组还包括第一紧固件(F1)和第二紧固件(F2)，分别位于连接器(4)在宽度方向(W)上的两侧，连接板(5)、FPC(3)的主体部(31)、FPC(3)的弯折部(32)以及端板(2)的突起(21)通过第一紧固件(F1)和第二紧固件(F2)固 定。
  6. 根据权利要求2所述的电池模组，其特征在于，
    FPC(3)的弯折部(32)从端板(2)的顶部沿端板(2)的长度方向(L)的外表面(22)向下延伸；
    连接板(5)位于FPC(3)的弯折部(32)和端板(2)的长度方向(L)的外表面(22)之间，且固定于端板(2)的长度方向(L)的外表面(22)；
    连接器(4)的插接口(41)沿宽度方向(W)设置。
  7. 根据权利要求6所述的电池模组，其特征在于，连接板(5)包括向下超出FPC(3)的弯折部(32)的底端的外露部分(51)，所述外露部分(51)位于连接器(4)的下侧，并且与端板(2)的长度方向(L)的外表面(22)固定。
  8. 根据权利要求7所述的电池模组，其特征在于，电池模组还包括第三紧固件(F3)，所述外露部分(51)与端板(2)的外表面(22)通过第三紧固件(F3)固定。
  9. 根据权利要求6所述的电池模组，其特征在于，电池模组还包括第四紧固件(F4)，位于连接器(4)的上侧，连接板(5)、端板(2)的外表面(22)以及FPC(3)的弯折部(32)通过第四紧固件(F4)固定。
  10. 根据权利要求6所述的电池模组，其特征在于，电池模组还包括第三紧固件(F3)和第四紧固件(F4)；连接板(5)包括向下超出FPC(3)的弯折部(32)的底端的外露部分(51)，所述外露部分(51)位于连接器(4)的下侧，并且与端板(2)的长度方向(L)的外表面(22)通过第三紧固件(F3)固定；第四紧固件(F4)位于连接器(4)的上侧，连接板(5)、端板(2)的外表面(22)以及FPC(3)的弯折部(32)通过第四紧固件(F4)固定。
  11. 根据权利要求6或9所述的电池模组，其特征在于，连接板(5)包括超出弯折部(32)的宽度方向(W)的两端的外露部分(51)，所述外露部分(51)位于连接器(4)的宽度方向(W)的两侧，并且与端板(2)的长度方向(L)的外表面(22)固定。
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