CN219246885U

CN219246885U - Sampling assembly and battery

Info

Publication number: CN219246885U
Application number: CN202320695015.9U
Authority: CN
Inventors: 邓依恒; 桂昊; 杜俊丰; 金佺良
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-06-23
Anticipated expiration: 2033-03-31

Abstract

The application provides a sampling assembly and battery relates to battery technical field. The sampling assembly comprises a converging component, a flexible circuit board and a collecting component. The converging component is used for being electrically connected with the pole of the battery cell. The flexible circuit board is used for collecting signals of the battery cells and comprises a conductive layer and a first insulating layer, and the first insulating layer covers one side of the conductive layer in the thickness direction. The collecting member in the embodiment of the application realizes electrical connection through the collecting member having elasticity. The acquisition component is used for acquiring the temperature or the voltage of the battery cell and comprises a sampling terminal and an elastic piece for supporting the sampling terminal. The elastic contact form enables the assembly process of the battery to be simpler, reduces the process cost of welding and clamping during assembly, can keep good connection, and can not cause the problem that electric signals cannot be transmitted due to cracking of welding parts, so that the sampling assembly has good stability.

Description

Sampling assembly and battery

Technical Field

The application relates to the technical field of batteries, in particular to a sampling assembly and a battery.

Background

In the existing battery, a sampling assembly is generally adopted to realize serial/parallel connection of a plurality of battery monomers and collection of electric signals, a converging component in the sampling assembly is connected with a pole of each battery monomer to realize serial connection or parallel connection of the plurality of battery monomers, and a flexible circuit board (FPC) is fixedly connected with the converging component through a leading-out sheet. The existing connection mode of the flexible circuit board and the bus bar component is usually clamping connection or welding connection, but the assembly process of the battery is complicated.

Disclosure of Invention

The purpose of the application is to provide a sampling assembly and a battery, which simplify the assembly process of the battery on the premise of keeping good stability.

Embodiments of the present application are implemented as follows:

in a first aspect, the present application provides a sampling assembly comprising:

the converging component is used for being electrically connected with the pole of the battery cell;

the flexible circuit board is used for collecting signals of the battery cells and comprises a conductive layer and a first insulating layer, wherein the first insulating layer covers one side of the conductive layer in the thickness direction;

the collecting component is used for collecting the temperature or the voltage of the battery cell and comprises a sampling terminal and an elastic piece for supporting the sampling terminal, and the sampling terminal is abutted with the converging component;

the first insulating layer is provided with an opening, the conducting layer comprises an exposed area exposed from the opening, and the elastic piece is arranged between the exposed area and the sampling terminal.

In an alternative embodiment, the sampling terminal comprises a temperature sensor and a wire harness connected to the temperature sensor, the elastic member has a through hole, and the wire harness passes through the through hole to be connected with the exposed area.

In an alternative embodiment, the elastic member comprises a spring, and the wire harness is connected to the exposed area through the center of the spring.

In an alternative embodiment, the elastic piece comprises an elastic block, the elastic block comprises a first surface and a second surface which are oppositely arranged along the supporting direction, a through hole penetrating through the first surface and the second surface is formed in the elastic block, and the wire harness penetrates through the through hole and is connected with the exposed area.

In an alternative embodiment, the sampling terminal comprises a voltage sampling sheet, the elastic member has a telescopic spiral structure, one end of the spiral structure is connected with the exposed area, and the other end of the spiral structure is connected with the voltage sampling sheet.

In a second aspect, the present application provides a battery comprising a battery cell and the sampling assembly of any of the preceding embodiments, the sampling assembly being mounted on the battery cell.

In an alternative embodiment, the device further comprises a supporting plate, wherein the supporting plate is used for bearing a battery cell, the battery cell is provided with a pole connected with the converging component, and the sampling terminal is arranged on one side, close to the battery cell, of the elastic piece;

the battery cell post sets up down, and the battery cell is pressed in the part that converges under the action of gravity to make sampling terminal laminating part that converges.

In an alternative embodiment, the support plate is provided with a receiving groove, the sampling assembly is arranged in the receiving groove, the elastic piece is compressed along the depth direction of the receiving groove, and the battery cell is provided with a pole extending into the receiving groove and connected with the confluence.

In an alternative embodiment, a second insulating layer is provided between the support plate and the flexible wiring board.

In an alternative embodiment, the accommodating groove is provided with a bottom wall and a side wall, the bottom wall is provided with a limiting strip, the cross section of the limiting strip in the direction perpendicular to the bottom wall is U-shaped, and the limiting strip and the bottom wall are encircled to form a plugging groove for inserting the end part of the flexible circuit board.

The beneficial effects of the embodiment of the application are that:

the application provides a sampling assembly, including converging part, flexible line way board and collection part. The converging component is used for being electrically connected with the pole of the battery cell. The flexible circuit board is used for collecting signals of the battery cells and comprises a conductive layer and a first insulating layer, and the first insulating layer covers one side of the conductive layer in the thickness direction. The electrical connection is realized through the elastic acquisition component instead of welding or clamping between the bus component and the flexible circuit board. The acquisition component is used for acquiring the temperature or the voltage of the battery cell and comprises a sampling terminal and an elastic piece for supporting the sampling terminal. The elastic contact form makes the assembling process of the battery simpler, and reduces the welding and clamping process cost during assembling. And realize flexible line way board and the elastic contact who converges the flow part through the elastic component in the collection part for there is a pretightning force between flexible line way board and the flow part, even meet with vibration, also can keep good connection, can not appear welding department fracture and lead to the unable problem of transmission of signal of telecommunication, therefore the sampling assembly of this battery has good stability.

The battery provided by the embodiment of the application comprises the sampling assembly, so that the battery also has the advantages of good stability and simple assembly process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a battery in one embodiment of the present application;

FIG. 2 is a schematic illustration of an assembly of a support plate and a sampling assembly in one embodiment of the present application;

FIG. 3 is a schematic diagram of a battery cell according to one embodiment of the present application;

FIG. 4 is an enlarged view of section IV of FIG. 2;

FIG. 5 is a schematic view of a flexible circuit board disposed in a receiving slot according to an embodiment of the present disclosure;

fig. 6 is a schematic view of a flexible circuit board disposed in a receiving groove according to another embodiment of the present application.

010-battery; 100-supporting plates; 101-a support surface; 102-an exhaust hole; 103-an exhaust passage; 104-accommodating grooves; 110-a second insulating layer; 200-battery cells; 210-a housing; 211-a pressure relief hole; 212-pressure relief part; 220-pole; 300-sampling assembly; 310-flexible circuit board; 311-limiting strips; 320-a converging component; 330-acquisition component; 331-an elastic member; 332-sampling terminals.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships that are conventionally put in use of the inventive product, are merely for convenience of description of the present application and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the sampling assembly of the existing battery, the connection mode of the flexible circuit board and the bus component is usually clamping or welding, but the assembly process of the battery is complex, the welding process or equipment or manpower is used for clamping and fixing the flexible circuit board and the bus component in the assembly process, and the process cost is high. Moreover, if the connection is made by welding, when the battery vibrates, there is a risk that the welded portion may crack, and once the connection between the bus member and the flexible circuit board fails, the battery cannot be acquired. Therefore, the conventional battery also has a problem of poor stability.

To this end, embodiments of the present application provide a sampling assembly and a battery. The assembly process is simplified by elastically abutting the bus component in the sampling assembly with the flexible circuit board, and the contact of the bus component and the flexible circuit board is ensured to have pretightening force, so that the connection between the bus component and the flexible circuit board is not easy to fail.

FIG. 1 is a schematic diagram of a battery 010 in an embodiment of the present application; fig. 2 is a schematic diagram illustrating the assembly of the support plate 100 and the sampling assembly 300 in one embodiment of the present application. As shown in fig. 1 and 2, the battery 010 provided in the present embodiment includes a support plate 100, a sampling assembly 300, and a plurality of battery cells 200. The support plate 100 is used for carrying and fixing the battery cells 200 and the sampling assembly 300, and the sampling assembly 300 is mounted on the battery cells 200, so that the battery cells 200 can be connected in series and/or in parallel. In this embodiment, the exhaust channel 103 is further disposed in the support plate 100, so that the eruption and eruption gas released by the battery unit 200 during the thermal runaway pressure release can be contained, thereby avoiding the thermal runaway from spreading and improving the safety of the battery 010.

In the present embodiment, the sampling assembly 300 and the battery cell 200 are both disposed on the support plate 100. The support plate 100 has a support surface 101 that supports the battery cells 200, and the support surface 101 faces upward in the view of fig. 1 and 2. The supporting plate 100 is provided with a receiving groove 104 on one side of the supporting surface 101, and the sampling assembly 300 is disposed in the receiving groove 104. When the battery cell 200 is mounted on the support surface 101 of the support plate 100, the post 220 thereof can be engaged with the sampling assembly 300.

In the present embodiment, the plurality of battery cells 200 are arranged in a plurality of rows extending in the first direction, and the battery cells 200 of each row are arranged in the second direction. The supporting plate 100 is also correspondingly provided with a plurality of accommodating grooves 104, and each accommodating groove 104 extends along the first direction and is arranged at intervals in the second direction. The supporting surface 101 is provided with vent holes 102 corresponding to the battery cells 200 one by one, and the vent holes 102 are communicated with the vent channels 103. The exhaust holes 102 of a row corresponding to the battery cells 200 are arranged at intervals along the first direction, and the exhaust holes 102 of each row are arranged at intervals along the second direction. As shown in fig. 2, the plurality of receiving grooves 104 and the plurality of rows of vent holes 102 are alternately arranged at intervals in the second direction.

Fig. 3 is a schematic diagram of a battery cell 200 according to an embodiment of the present application. As shown in fig. 3, the battery cell 200 includes a case 210 and a post 220 protruding from an outer surface of the case 210. The battery cell 200 has two posts 220 corresponding to the positive and negative electrodes, respectively. In this embodiment, the battery cell 200 is a square cell, and two poles 220 are protruding on the same side of the housing 210 of the battery cell 200. After the battery cell 200 is mounted on the support plate 100, the pole 220 faces the sampling assembly 300 and extends into the accommodating groove 104 to be matched with the sampling assembly 300. In this embodiment, two poles 220 of one battery cell 200 respectively extend into one accommodating groove 104, and a region between the two poles 220 is used for abutting against the supporting surface 101 of the supporting plate 100 and keeping fixed with the supporting plate 100.

In addition, the casing 210 of the battery cell 200 in this embodiment is further provided with a pressure relief hole 211, and the pressure relief hole 211 is used for releasing internal pressure when the battery cell 200 is out of control, so as to prevent the battery cell 200 from explosion and improve the safety of the battery 010. In the present embodiment, the pressure relief hole 211 and the pole 220 are disposed on the same side and between the two poles 220. Specifically, the pressure relief hole 211 is provided with a pressure relief piece 212 for blocking the pressure relief hole 211, and the pressure relief piece 212 can isolate the inside and the outside of the casing 210 in the normal state of the battery. When the battery cell 200 is out of control, the temperature and pressure in the casing 210 rise, and when the pressure reaches a threshold value, the pressure release piece 212 is preferentially torn or falls off, so that the pressure in the casing 210 is released, and explosion is avoided. In the process of pressure release, the battery cell 200 can release high-temperature eruption (gas, solid or molten substances), in order to avoid negative influence of the eruption on other battery cells 200 or components in the battery 010, in this embodiment, when the battery cell 200 is mounted on the support plate 100, the pressure release hole 211 corresponds to the position of the exhaust hole 102 of the support plate 100, so that even if thermal runaway occurs to release pressure, the eruption can enter the exhaust channel 103 first, be accommodated by the exhaust channel 103, and avoid influencing other battery cells 200 nearby, and avoid short circuit and fire of other battery cells 200 due to the adhesion of eruption, thereby causing thermal runaway spreading.

In this embodiment, the battery cell 200 uses a square cell, and in other embodiments, the battery cell 200 may be a cylindrical cell.

FIG. 4 is an enlarged view of section IV of FIG. 2; fig. 5 is a schematic diagram illustrating the flexible circuit board 310 being disposed in the accommodating groove 104 according to an embodiment of the present application. As shown in fig. 2, 4 and 5, in the present embodiment, the sampling assembly 300 is disposed in the accommodating groove 104 of the support plate 100, and the sampling assembly 300 includes a flexible circuit board 310 disposed on the support plate 100, a bus member 320 connected to the pole 220, and a collecting member 330 disposed between the bus member 320 and the flexible circuit board 310, and the bus member 320 and the flexible circuit board 310 are elastically contacted and electrically connected by the collecting member 330.

The flexible circuit board 310 is electrically connected with the bus bar member 320 through the collecting member 330 to collect signals of the battery cells 200. The flexible wiring board 310 includes a conductive layer and a first insulating layer covering one side in the thickness direction of the conductive layer. The first insulating layer is provided with an opening, and the conductive layer includes an exposed region exposed from the opening, and the exposed region is connected to the collecting member 330. The first insulating layer can ensure insulation of other parts of the flexible circuit board 310 except the exposed area, and avoid short circuit between other parts of the flexible circuit board 310 and the bus member 320.

Specifically, when the collection member 330 contacts the bus member 320, voltage and/or current information may be collected. In this embodiment, the flexible circuit board 310 is strip-shaped, extends along the length direction of the accommodating groove 104, and is laid in the accommodating groove 104. The bus member 320 may be connected with the post 220 of the battery cell 200 by welding. The bus member 320 may be made of metal having good conductivity, such as aluminum or copper.

Further, the collecting member 330 includes an elastic member 331 and a sampling terminal 332, and the elastic member 331 is disposed between the exposed area of the flexible circuit board 310 and the sampling terminal 332. One end of the elastic member 331 is connected to the flexible wiring board 310, the other end is connected to the sampling terminal 332, and the sampling terminal 332 is abutted against the bus member 320. The battery cell 200 has the pole 220 facing downward, and the battery cell 200 is pressed against the bus member 320 under the action of gravity, so that the sampling terminal 332 is attached to the bus member 320.

In one embodiment, sampling terminal 332 is a voltage sampling pad and such acquisition component 330 is used to acquire voltage information. The elastic piece 331 has a spiral structure, one end of the spiral structure is connected with the exposed area, and the other end is connected with the voltage sampling piece. Further, the elastic member 331 may be a spring, which is made of a metal material with good electrical conductivity to achieve good signal transmission.

In another embodiment, the sampling terminal includes a temperature sensor and a wire harness (not shown) connected to the temperature sensor, and the elastic member 331 has a through hole through which the wire harness is connected to the bare area, thereby achieving electric signal transmission. Further, the elastic member 331 includes a spring, and the wire harness is connected to the bare area through the center of the spring. Because the spring naturally forms the central through hole, therefore the spring is selected for the elastic piece 331, and the wire harness can pass through the center of the spring so as to be connected with the flexible circuit board 310, and the elastic piece 331 can not only realize elastic abutting action, but also accommodate and protect the wire harness. In another embodiment, the elastic element 331 includes an elastic block, the elastic block includes a first surface and a second surface that are disposed opposite to each other along a supporting direction, a through hole penetrating the first surface and the second surface is formed in the elastic block, and a wire harness penetrates through the through hole and is connected to the exposed area.

In the normal assembled state, the elastic member 331 is in a compressed state, specifically compressed in the depth direction of the accommodation groove 104. This enables the elastic member 331 to abut the sampling terminal 332 against the bus member 320 and generate a certain pressure, so that even if the battery 010 vibrates, the bus member 320 is not disconnected from the sampling terminal 332 to cause electrical connection failure, thereby ensuring the stability of the function of the sampling assembly 300. In alternative other embodiments, the elastic element 331 may be replaced by a spring, so that the sampling terminal 332 can abut against the bus member 320.

In alternative embodiments, the sampling terminal 332 may also be directly abutted to the post 220 of the battery cell 200.

In the present embodiment, a second insulating layer 110 is disposed between the support board 100 and the flexible circuit board 310, and the flexible circuit board 310 can be electrically isolated from the support board 100 by the second insulating layer 110. Specifically, the second insulating layer 110 may be an insulating sheet or an insulating film laid on the support plate 100, which covers the surface of the support plate 100. As shown in fig. 5, the second insulating layer 110 covers the supporting surface 101 of the supporting plate 100 and the bottom and side walls of the receiving groove 104, and exposes the exhaust hole 102. The second insulating layer 110 may be made of rubber, silica gel, or the like.

Fig. 6 is a schematic diagram illustrating a flexible circuit board 310 disposed in the accommodating groove 104 according to another embodiment of the present application. As shown in fig. 6, the second insulating layer 110 may be disposed between the flexible circuit board 310 and the support board 100, that is, the second insulating layer 110 is only laid on the bottom of the accommodating groove 104. The second insulating layer 110 may be foam, and may serve as insulation and buffer.

Further, a limiting bar 311 is disposed on the bottom wall of the accommodating groove 104, and the limiting bar 311 abuts against the edge of the flexible circuit board 310 to limit the flexible circuit board 310. As shown in fig. 6, specifically, the cross section of the limiting strip 311 in the direction perpendicular to the bottom wall is U-shaped, and the limiting strip 311 and the bottom wall are surrounded to form a plugging slot into which the end of the flexible circuit board 310 is inserted. By providing the stopper 311 in this manner, the flexible wiring board 310 can be limited in the width and length directions. The spacing 311 may be fixed to the second insulating layer 110 by bonding. In order to improve stability, two sides of the limit strip 311 may be abutted against two side walls of the accommodating groove 104, so that displacement of the flexible circuit board 310 may be effectively avoided.

In this embodiment, the battery cell 200 may be fixedly connected to the support plate 100 by an adhesive; in the embodiment of fig. 5, the battery cell 200 is adhered to the second insulating layer 110 on the support plate 100 by means of adhesive, and in the embodiment of fig. 6, the battery cell 200 is directly adhered to the support plate 100 by means of adhesive.

To sum up, the application provides a battery 010, including backup pad 100, sampling subassembly 300 and battery monomer 200 all set up in backup pad 100, and battery monomer 200 has the utmost point post 220 towards sampling subassembly 300, and sampling subassembly 300 is including setting up in the flexible line way board 310 of backup pad 100 and connecting in the converging part 320 of utmost point post 220, is provided with collection part 330 between converging part 320 and the flexible line way board 310, through collection part 330 elastic contact and electric connection between converging part 320 and the flexible line way board 310. The bus member 320 and the flexible circuit board 310 in the embodiment of the present application are elastically contacted by the collecting member 330 without soldering or clamping, and are electrically connected. The elastic contact form makes the assembly process of the battery 010 simpler, and reduces the process cost of welding and clamping during assembly. Moreover, the flexible circuit board 310 and the converging component 320 are elastically contacted through the collecting component 330, so that a pretightening force exists between the flexible circuit board 310 and the converging component 320, even if vibration occurs, good connection can be kept, the problem that electric signals cannot be transmitted due to cracking of welding parts can not occur, and therefore the sampling assembly 300 of the battery 010 has good stability.

The battery pack provided by the embodiment of the application comprises the battery 010, so that the battery pack also has the advantages of being good in stability and simple in assembly process.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A sampling assembly, comprising:

the first insulating layer is provided with an opening, the conductive layer comprises an exposed area exposed from the opening, and the elastic piece is arranged between the exposed area and the sampling terminal.

2. The sampling assembly of claim 1, wherein the sampling terminal comprises a temperature sensor and a wire harness connected to the temperature sensor, the elastic member having a through hole through which the wire harness passes to connect with the bare area.

3. The sampling assembly of claim 2, wherein the resilient member comprises a spring, the wire harness being connected to the bare area through the center of the spring.

4. The sampling assembly of claim 3, wherein the elastic member comprises an elastic block, the elastic block comprises a first surface and a second surface which are oppositely arranged along the supporting direction, a through hole penetrating through the first surface and the second surface is formed in the elastic block, and the wire harness penetrates through the through hole and is connected with the exposed area.

5. The sampling assembly of claim 1, wherein the sampling terminal comprises a voltage sampling tab, the elastic member has a telescoping spiral structure, one end of the spiral structure is connected to the exposed area, and the other end is connected to the voltage sampling tab.

6. A battery comprising a battery cell and a sampling assembly according to any one of claims 1 to 5, the sampling assembly being mounted on the battery cell.

7. The battery of claim 6, further comprising a support plate for carrying a battery cell having a post connected to the bus member, the sampling terminal being mounted to a side of the elastic member adjacent to the battery cell;

the battery cell post sets up down, the battery cell under the action of gravity press in the part that converges, so that sampling terminal laminating the part that converges.

8. The battery according to claim 7, wherein the support plate is provided with a receiving groove, the sampling assembly is disposed in the receiving groove, the elastic member is compressed along a depth direction of the receiving groove, and the battery cell has a post extending into the receiving groove to be connected with the confluence.

9. The battery of claim 7, wherein a second insulating layer is disposed between the support plate and the flexible circuit board.

10. The battery according to claim 8, wherein the accommodating groove is provided with a bottom wall and a side wall, a limit bar is arranged on the bottom wall, a cross section of the limit bar in a direction perpendicular to the bottom wall is in a U shape, and the limit bar and the bottom wall are surrounded to form a plugging groove for inserting an end portion of the flexible circuit board.