Sampling structure, battery module, energy storage device and electric equipment

Abstract

The utility model discloses a sampling structure, a battery module, an energy storage device and electric equipment. The sampling structure comprises a plurality of electric connecting pieces and a sampling plate. And one end part of the electric connecting piece is connected with a battery cell of the battery module. The sampling plate comprises a main body part, a plurality of first connecting parts and a plurality of first stress release grooves, and each first connecting part is correspondingly connected with the other end part of one electric connecting piece; a plurality of first connecting parts are arranged on the two opposite sides of the main body part in the first direction; every two adjacent first connecting parts are arranged in a staggered mode in the second direction, and the second direction is perpendicular to the first direction. One end part of the first connecting part is connected with the main body part, and a first notch is formed at the joint of the other end of the first connecting part and the main body part; the plurality of first stress releasing grooves are in one-to-one correspondence with the plurality of first connecting parts, the first stress releasing grooves surround the ends, away from the electric connecting piece, of the corresponding first connecting parts, and at least parts of the first stress releasing grooves and the first notches are oppositely arranged in the first direction.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a sampling structure, a battery module, an energy storage device and an electrical equipment. Background Art

[0002] In order to ensure safety performance in the battery module, it is necessary to collect the temperature and voltage of the battery cell, usually through the flexible printed circuit (FPC) board and nickel sheet. However, there is a problem of heat expansion during the use of the battery cell, which causes the nickel sheet connected to the battery cell to expand and warp, and it is easy to disconnect the nickel sheet from the FPC board. Utility Model Content

[0003] The present application provides a sampling structure, a battery module, an energy storage device and an electrical equipment, which are at least used to solve the problem of poor connection reliability between the nickel sheet and the FPC board.

[0004] In the first aspect, the present application provides a sampling structure, which is used for a battery module. The sampling structure includes a plurality of electrical connectors and a sampling plate, and one end of the electrical connector is connected to the battery cell of the battery module. The sampling plate includes a main body, a plurality of first connecting parts and a plurality of first stress release grooves, each of which is connected to one of the electrical connectors; the main body is provided with a plurality of first connecting parts on opposite sides in the first direction; two adjacent first connecting parts are staggered along the second direction, and the second direction is perpendicular to the first direction; one end of the first connecting part is connected to the main body, and a first notch is formed at the connection between the other end of the first connecting part and the main body; a plurality of the first stress release grooves correspond to a plurality of the first connecting parts one by one, and the first stress release groove surrounds the corresponding first connecting part away from one end of the electrical connector, and at least part of the first stress release groove is arranged opposite to the first notch along the first direction.

[0005] In the sampling structure of the present application, a first notch and a first stress release groove are provided on the sampling plate, and the first stress release groove extends from one end of the first connection part to the other end of the first connection part and surrounds the first connection part. When the battery cell expands and causes the electrical connector to tilt, it is easy to break from the first notch (such as partial breakage or complete breakage), while one end of the first connection part is still connected to the main body. In this way, while ensuring that the first connection part and the main body are in a connected state, the first connection part can tilt relative to the main body, has a good degree of freedom, can provide a certain displacement amount for the expansion of the battery cell, and improves the connection reliability between the sampling plate and the electrical connector; in addition, along the second direction, two adjacent first connection parts are staggered to avoid the first connection parts being opened on both sides of the first direction of the sampling plate, which leads to a decrease in the structural strength of the sampling plate, which is beneficial to ensure the structural strength of the sampling plate, and the first stress release groove can be used to release the stress of the battery cell expansion on the sampling plate, thereby reducing damage to the sampling plate.

[0006] In combination with the first aspect, in a possible implementation manner, the first stress relief groove surrounds the other end portion of the first electrical connector.

[0007] With such arrangement, under the action of the expansion force of the battery cell, the stress at the connection between the first connection part and the other end of the electrical connector is relatively large, and the first stress release groove can reduce the stress of the other end of the electrical connector on the first connection part, thereby reducing damage to the sampling plate.

[0008] In combination with the first aspect, in a possible implementation, the sampling plate also includes a plurality of second notches, a plurality of second stress release grooves and a plurality of second connecting parts, at least one second connecting part is provided at the two opposite ends of the main body along the second direction, one end of each second connecting part is connected to the main body, and each second connecting part is correspondingly connected to the other end of one of the electrical connectors; the plurality of second notches correspond one-to-one to the plurality of second connecting parts, and the second notches are located on one side of the corresponding second connecting part; the second stress release groove surrounds the second connecting part, and the second stress release groove is connected to the second notch.

[0009] In combination with the first aspect, in a possible implementation, the main body includes a first end, the first end is an end of the main body along the second direction, and the first end is connected to the other end of the electrical connector; along the first direction, a second notch is respectively provided on two opposite sides of the first end.

[0010] Since the second notches are formed on both sides of the first end along the first direction, the size of the first end along the first direction is relatively small. Under the action of the expansion force of the battery cell, the first end is easily warped toward the side away from the battery cell. The first end has a good degree of freedom and can provide a certain displacement for the expansion of the battery cell, thereby improving the connection reliability between the first end and the electrical connector.

[0011] In combination with the first aspect, in a possible implementation, along the first direction, one second connection portion is provided on opposite sides of the first end, respectively; along the second direction, two second connection portions located on both sides of the first end are at least partially staggered.

[0012] With this arrangement, the two second connection parts are staggered along the second direction, which avoids the second connection parts being opened on both sides of the sampling plate in the first direction directly facing each other, which would cause the structural strength of the sampling plate to decrease, and is beneficial to ensuring the structural strength of the sampling plate.

[0013] In combination with the first aspect, in a possible implementation, the sampling plate is further provided with a matching hole, the matching hole passes through the main body, and the matching hole is used to fix the sampling plate to the first bracket of the battery module.

[0014] A matching hole is provided on the main body to be connected and fixed with the first bracket of the battery module, thereby simplifying the manufacturing process of the sampling plate and making the connection method simple.

[0015] In a second aspect, the present application provides a battery module, comprising a sampling structure and a plurality of battery cells as provided in any implementation of the first aspect, wherein the first connecting portion is connected to the battery cells through the electrical connector.

[0016] In combination with the second aspect, in a possible implementation, the battery module also includes a first bracket and a support platform, the first bracket is mounted on the battery cell and is at least partially located on one side of the battery cell along a third direction, and the third direction, the first direction and the second direction are perpendicular to each other; the support platform is protruded along the third direction on a side of the first bracket away from the battery cell, and the support platform supports the sampling plate and is connected and fixed to the sampling plate.

[0017] In combination with the second aspect, in a possible implementation, the battery module further includes a fixing member, the fixing member is protruded from the support platform along the third direction, and the fixing member is connected and fixed in cooperation with a matching hole of the sampling plate.

[0018] In combination with the second aspect, in a possible implementation, along the first direction, there is a spacing between the first connection portion and a surface of the support platform close to the first connection portion, and between the second connection portion and a surface of the support platform close to the second connection portion.

[0019] In this way, the sampling plate is provided with a first connection part and a second connection part, which are suspended relative to the support platform, and the first connection part and the second connection part have a certain deformation space. In this way, the first connection part and the second connection part can follow the electrical connection part to produce a certain warping deformation along the third direction, thereby ensuring that the sampling plate and the electrical connection part remain in a connected state, and at the same time reducing the phenomenon of the sampling plate breaking due to excessive warping.

[0020] In combination with the second aspect, in a possible implementation, the number of the battery cells is multiple, the battery module includes multiple tabs, and one tab connects one of the battery cells to one of the electrical connectors.

[0021] In combination with the second aspect, in a possible implementation, the battery module further includes a plurality of partitions, which are protruded along the third direction on a side of the first bracket away from the battery cell, and one partition is arranged between two adjacent tabs.

[0022] Such a configuration is helpful to reduce or prevent the discharge effect between the bars that are too close to each other, and makes the overall structure more compact, thereby improving space utilization.

[0023] In combination with the second aspect, in a possible implementation, the battery module also includes a limiting member, which is protruded along the third direction on a side of the first bracket away from the battery cell, and the tab is provided with a limiting portion, which cooperates with the limiting member to limit the tab in the radial direction of the battery cell.

[0024] The setting of the limiter can effectively limit the position of the tab on the battery cell, reduce or prevent the tab from being pulled away from the battery cell by the electrical connector, and effectively ensure the reliability of the connection between the tab and the battery cell. At the same time, when the battery cell expands or the battery module shakes, the tab has a deformation space along the third direction, and can move a certain amount in the third direction with the expansion of the battery cell, so that the battery cell and the tab always remain connected, ensuring the reliability of the connection between the battery cell and the tab.

[0025] In a third aspect, the present application provides an energy storage device, which includes a battery module provided in any implementation of the second aspect.

[0026] In a fourth aspect, the present application provides an electrical device, wherein the electrical device comprises the energy storage device provided in the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0028] Figure 1A schematic diagram of the structure of an energy storage device provided in one embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of a battery module provided in one embodiment of the present application;

[0030] Figure 3 A schematic diagram of a sampling structure provided in one embodiment of the present application;

[0031] Figure 4 for Figure 3 A schematic diagram of the structure of the sampling plate in the sampling structure shown;

[0032] Figure 5 for Figure 2 A schematic structural diagram of a first bracket in the battery module shown;

[0033] Figure 6 for Figure 2 The cross-sectional structure diagram of the battery module shown is along the VI-VI line.

[0034] Description of reference numerals:

[0035] A-first direction; B-second direction; C-third direction; 10-sampling structure; 11-sampling plate; 111-main body; 1111-first end; 1112-second end; 112-first connecting part; 113-first stress release groove; 114-first notch; 115-second connecting part; 116-second notch; 117-second stress release groove; 118-matching hole; 12-electrical connector; 20-first bracket; 30-second bracket; 40-battery cell; 50-support platform; 60-fixing part; 70-bar; 71-limiting part; 80-partition; 90-limiting part; 100-battery module; 200-casing; 1000-energy storage device. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] The following descriptions of the various embodiments are made with reference to the attached drawings to illustrate specific embodiments that may be implemented in the present application. Directional terms mentioned herein, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are intended to better and more clearly describe and understand the present application, rather than to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, the serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0039] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of an energy storage device 1000 provided in one embodiment of the present application. The present application provides an electric device, the electric device includes the energy storage device 1000 provided in the present application, and the energy storage device 1000 supplies power to the electric device.

[0040] The electrical equipment provided in this application includes but is not limited to power grids, base stations and other electrical equipment.

[0041] The energy storage device 1000 may be used to store electrical energy to supply electrical equipment when electricity prices are at peak, or to provide power during a power outage / blackout.

[0042] There may be several energy storage devices 1000, which are connected in series or in parallel. In this embodiment, "several" means two or more.

[0043] See also Figure 2 , Figure 2 The schematic diagram of the structure of the battery module 100 provided in one embodiment of the present application is as follows. The energy storage device 1000 comprises the battery module 100 provided in the present application and a box 200 , wherein the battery module 100 is accommodated in the box 200 .

[0044] It is understood that the energy storage device 1000 may include but is not limited to a battery module, a battery pack, a battery system, etc. The actual application form of the energy storage device 1000 provided in the embodiment of the present application may be but is not limited to the listed products, and may also be other application forms. The embodiment of the present application does not strictly limit the application form of the energy storage device 1000. The embodiment of the present application only takes the energy storage device 1000 as a battery module 100 as an example for explanation.

[0045] In order to ensure safety performance in the battery module, it is necessary to collect the temperature and voltage of the battery cell, usually through the FPC board and nickel sheet. However, there is a problem of heat expansion during the use of the battery cell, which causes the nickel sheet connected to the battery cell to expand and warp, and it is easy to disconnect the nickel sheet from the FPC board.

[0046] It should be noted that, for ease of understanding, the direction of the longest side of a device is defined as the length direction of the device, the thickness direction is defined as the height direction, and the direction of the shorter side is defined as the width direction of the device.

[0047] The battery module 100 provided in the present application includes a sampling structure 10, a first bracket 20, a second bracket 30 and a plurality of battery cells 40. The sampling structure 10 is arranged on the first bracket 20, and the sampling structure 10 is used to collect the temperature and voltage of the plurality of battery cells 40. The first bracket 20 and the second bracket 30 are arranged relative to each other and connected and fixed, and the first bracket 20 and the second bracket 30 are used to support and fix the plurality of battery cells 40.

[0048] Please combine Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of a sampling structure 10 provided in an embodiment of the present application. Figure 4 for Figure 3 The schematic diagram of the structure of the sampling plate 11 in the sampling structure 10 shown. The sampling structure 10 includes the sampling plate 11 and the electrical connector 12. The sampling plate 11 includes a main body 111, a plurality of first connecting parts 112 and a plurality of first stress release grooves 113. Each first connecting part 112 is connected to the other end of an electrical connector 12; the main body 111 is provided with a plurality of first connecting parts 112 on opposite sides in the first direction A; two adjacent first connecting parts 112 are staggered along the second direction B, and the second direction B is perpendicular to the first direction A. One end of the first connecting part 112 is connected to the main body 111, and a first notch 114 is formed at the connection between the other end of the first connecting part 112 and the main body 111; the plurality of first stress release grooves 113 correspond to the plurality of first connecting parts 112 one by one, and the first stress release groove 113 surrounds the corresponding first connecting part 112 away from one end of the electrical connector 12, and at least part of the first stress release groove 113 is arranged opposite to the first notch 114 along the first direction A.

[0049] A first notch 114 and a first stress release groove 113 are provided on the sampling plate 11. The first stress release groove 113 extends from one end of the first connection portion 112 to the other end of the first connection portion 112 and surrounds the first connection portion 112. When the battery cell 40 expands and causes the electrical connector 12 to tilt up, it is easy to break (such as partially break or completely break) at the first notch 114, while one end of the first connection portion 112 is still connected to the main body 111. In this way, while ensuring that the first connection portion 112 and the main body 111 are in a connected state, the first connection portion 112 can tilt relative to the main body 111, has a good degree of freedom, can provide a certain displacement for the expansion of the battery cell 40, and improves the connection reliability between the sampling plate 11 and the electrical connector 12. In addition, along the second direction B, two adjacent first connection portions 112 are staggered to avoid the first connection portions 112 being opened on both sides of the first direction A of the sampling plate 11, which would cause the structural strength of the sampling plate 11 to decrease. This is beneficial to ensuring the structural strength of the sampling plate 11, and the first stress release groove 113 can be used to release the stress of the sampling plate 11 caused by the expansion of the battery cell 40, thereby reducing damage to the sampling plate 11.

[0050] The first stress release groove 113 may penetrate two opposite sides of the main body 111 along the third direction C, and the third direction C, the first direction A and the second direction B are perpendicular to each other.

[0051] The first stress release groove 113 is arranged around the first connecting part 112, and the first stress release groove 113 semi-encloses the outer periphery of the first connecting part 112. Specifically, the first stress release groove 113 is "U"-shaped to separate the first connecting part 112 and the main body 111, while ensuring the connection between the first connecting part 112 and the main body 111.

[0052] At least a portion of the first stress release groove 113 is arranged opposite to the first notch 114 along the first direction A. For example, at least a portion of the first stress release groove 113 and the first notch 114 are located on opposite sides of the connection between the other end of the first connecting portion 112 and the main body 111. In this way, the size of the connection between the other end of the first connecting portion 112 and the main body 111 is reduced, so that the other end of the first connecting portion is easier to break to disconnect from the main body 111 at the first notch 114.

[0053] Among them, the surface of the first connecting part 112 can be stacked with the other end of the electrical connector 12, so that the first stress release groove 113 surrounding the first connecting part 112 also surrounds the other end of the electrical connector 12. Under the action of the expansion force of the battery cell 40, the stress at the connection between the first connecting part 112 and the other end of the electrical connector 12 is relatively large. The first stress release groove 113 can reduce the stress of the other end of the electrical connector 12 on the first connecting part 112, thereby reducing damage to the sampling plate 11.

[0054] The first notch 114 is located at the edge of the main body 111. The setting of the first notch 114 reduces the size of the connection between the other end of the first connection part 112 and the main body 111. When the expansion force of the battery cell 40 acts on the sampling plate 11, the other end of the first connection part 112 is more likely to break and disconnect from the main body 111 from the other end of the first connection part 112, thereby improving the freedom of the first connection part 112.

[0055] For example, the sampling plate 11 further includes a plurality of second connection parts 115, a plurality of second notches 116 and a plurality of second stress release grooves 117. At least one second connection part 115 is provided at two opposite ends of the main body 111 along the second direction B. One end of each second connection part 115 is connected to the main body 111, and each second connection part 115 is correspondingly connected to the other end of an electrical connector 12. The plurality of second notches 116 correspond one-to-one to the plurality of second connection parts 115, and the second notches 116 are located on one side of the corresponding second connection part 115. The second stress release groove 117 surrounds the second connection part 115, and the second stress release groove 117 is connected to the second notch 116.

[0056] In one embodiment, the main body 111 includes a first end 1111 and a second end 1112 opposite to each other along a second direction B, a second connection portion 115 is provided on both sides of the first end 1111 opposite to each other along the first direction A, a second connection portion 115 is provided on one side of the second end 1112 along the first direction A, and each second connection portion 115 corresponds to a second notch 116 and a second stress release groove 117.

[0057] Specifically, a second notch 116 is provided on opposite sides of the first end 1111 along the first direction A, respectively, and the two second notches 116 at the first end 1111 are located at the corners of the sampling plate 11. The second stress release groove 117 surrounds a corner of the second connecting portion 115, that is, the second stress release groove 117 extends from one side of the second connecting portion 115 to another adjacent side. The second stress release groove 117 is connected to the second notch 116, and the second stress release groove 117 and the second notch 116 surround the outer periphery of the second connecting portion 115 together. The second notch 116 is opened at the first end 1111 and the second end 1112 instead of the second notch 116 at the outer edge of the entire sampling plate 11, so that the area of ​​the main body 111 is as large as possible to increase the overall structural strength of the sampling plate 11. At the same time, one end of the second connection part 115 is connected to the main body 111, and the other ends of the second connection part 115 are surrounded by the second notch 116 and the second stress release groove 117, so that the second connection part 115 can be lifted to a certain extent under the action of the expansion force of the battery cell 40.

[0058] Among them, since a second notch 116 is respectively provided on two opposite sides of the first end 1111 along the first direction A, the size of the first end 1111 along the first direction A is relatively small, and an electrical connector 12 can be provided on the side of the first end 1111 away from the second end 1112 and connected to the electrical connector 12. Under the action of the expansion force of the battery cell 40, the first end 1111 can easily tilt toward the side away from the battery cell 40. The first end 1111 has a good degree of freedom and can provide a certain displacement for the expansion of the battery cell 40, thereby improving the connection reliability between the first end 1111 and the electrical connector 12.

[0059] For example, along the second direction B, the two second connection parts 115 on the opposite sides of the first end 1111 along the first direction A are at least partially staggered. That is, the orthographic projections of the two second connection parts 115 at the first end 1111 along the first direction A at least partially do not overlap. This arrangement avoids the second connection parts 115 being provided on opposite sides of the sampling plate 11 in the first direction A, which may cause the structural strength of the sampling plate 11 to decrease, and is conducive to ensuring the structural strength of the sampling plate 11.

[0060] It can be understood that one second connection portion 115 can be provided at each of the first end portion 1111 and the second end portion 1112. Two second connection portions 115 can also be provided at each of the first end portion 1111 and the second end portion 1112, which is specifically set according to actual needs. The first end portion 1111 is provided with a second notch 116 on one side along the first direction A, such as Figure 4 shown.

[0061] For example, the opening of the second notch 116 is larger than the opening of the first notch 114 , so that more first connecting portions 112 can be provided while ensuring the overall structural strength of the sampling plate 11 .

[0062] For example, the sampling plate 11 is further provided with a matching hole 118, which penetrates two opposite surfaces of the main body 111 along the third direction C, and is used to fix the sampling plate 11 to the first bracket 20. There are multiple matching holes 118, and the multiple matching holes 118 are arranged at intervals along the second direction B. The matching holes 118 are provided in the main body 111 to connect and fix with the first bracket 20, which simplifies the manufacturing process of the sampling plate 11 and the connection method is simple.

[0063] The first bracket 20 and the second bracket 30 are arranged opposite to each other along the height direction of the battery module 100. The first bracket 20 is sleeved on a part of the battery cell 40 and at least partially located on one side of the battery cell 40 along the third direction C. The second bracket 30 is sleeved on another part of the battery cell 40 and at least partially located on the other side of the battery cell 40 along the third direction C. A support platform 50 is protruded from one side of the first bracket 20 along the third direction C. The support platform 50 is used to support the sampling plate 11 and is connected and fixed to the sampling plate 11.

[0064] Please combine Figure 5 , Figure 5 for Figure 2 The schematic diagram of the structure of the first bracket 20 in the battery module 100 shown. Specifically, a support platform 50 is formed on a side of the first bracket 20 facing away from the second bracket 30. The battery module 100 also includes a fixing member 60, which is convexly provided on the support platform 50 along the third direction C. The number of the fixing members 60 is consistent with the number of the matching holes 118, and the fixing members 60 are connected and fixed with the matching holes 118. The fixing member 60 can be a hot riveting column, and the matching hole 118 is provided on the central axis of the main body 111 along the second direction B. The hot riveting column is connected and fixed with the central axis of the main body 111 by pressure riveting. The sampling plate 11 is fixed on the support platform 50 by the fixing member 60, and when the first connecting portion 112 and the second connecting portion 115 on the sampling plate 11 are deformed, it is ensured that the main body 111 can be relatively fixed on the support platform 50, thereby reducing or avoiding the occurrence of the sampling plate 11 being offset relative to the support platform 50.

[0065] Please combine Figure 6 , Figure 6 for Figure 2 The schematic diagram of the cross-sectional structure of the battery module 100 along the VI-VI line is shown. In the present application, along the first direction A, there is a spacing between the first connection portion 112 and the side of the support platform 50 close to the first connection portion 112, and between the second connection portion 115 and the side of the support platform 50 close to the second connection portion 115. In this way, the sampling plate 11 is provided with the first connection portion 112 and the second connection portion 115, which are suspended relative to the support platform 50, and the first connection portion 112 and the second connection portion 115 have a certain deformation space, so that they can produce a certain warping deformation along the third direction C with the electrical connector 12, ensuring that the sampling plate 11 and the electrical connector 12 remain connected, while reducing the phenomenon of the sampling plate 11 being broken due to excessive warping.

[0066] For example, the number of the support platforms 50 may be multiple, and the multiple support platforms 50 are arranged in an interval along the first direction A. Along the first direction A, there is a spacing between the first connecting portion 112 and a side of the adjacent support platform 50 close to the first connecting portion 112, and between the second connecting portion 115 and a side of the adjacent support platform 50 close to the second connecting portion 115.

[0067] The battery module 100 also includes a tab 70, which is disposed on the battery cell 40 and electrically connected to the battery cell 40. The tab 70 is fixedly connected and electrically connected to one end of the electrical connector 12. There are multiple tabs 70, and one tab 70 is connected to one battery cell 40 and one electrical connector 12. The battery module 100 also includes multiple partitions 80, which are convexly disposed on a side of the first bracket 20 away from the battery cell 40 along the third direction C. A partition 80 is disposed between two adjacent tabs 70. Such a configuration is conducive to reducing or preventing the discharge effect between tabs 70 that are too close, and the overall structure can be designed to be more compact, thereby improving space utilization.

[0068] In one embodiment, along the third direction C, the size of the partition 80 is larger than the size of the bar piece 70 . Such a configuration effectively increases the creepage distance between two adjacent bar pieces 70 , thereby reducing or avoiding the discharge effect between two adjacent bar pieces 70 .

[0069] For example, the battery module 100 further includes a stopper 90, which is convexly disposed on a side of the first bracket 20 away from the battery cell 40 along the third direction C. The tab 70 is provided with a stopper 71, which cooperates with the stopper 90 to limit the tab 70 in the radial direction of the battery cell 40. Specifically, the tab 70 is provided with a stopper 71 on one side facing the main body 111 and on the other side away from the main body 111, and each stopper 71 is connected with a stopper 90. The stopper 71 may be a perforation, and the stopper 71 is disposed at the outer edge of the tab 70.

[0070] The setting of the limiter 90 can effectively limit the position of the tab 70 on the battery cell 40, reduce or prevent the tab 70 from being pulled away from the battery cell 40 by the electrical connector 12, and effectively ensure the reliability of the connection between the tab 70 and the battery cell 40. At the same time, when the battery cell 40 expands or the battery module 100 shakes, the tab 70 has a deformation space along the third direction C, and can move a certain amount in the third direction C as the battery cell 40 expands, so that the battery cell 40 and the tab 70 always remain connected, ensuring the reliability of the connection between the battery cell 40 and the tab 70.

[0071] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A sampling structure (10) for a battery module (100), characterized in that: The sampling structure (10) comprises: A plurality of electrical connectors (12), one end of each of the electrical connectors (12) being connected to a battery cell (40) of the battery module; A sampling plate (11) comprises a main body (111), a plurality of first connecting parts (112) and a plurality of first stress release grooves (113), each of the first connecting parts (112) correspondingly connected to the other end of an electrical connector (12); the main body (111) is provided with a plurality of first connecting parts (112) on opposite sides in a first direction (A); two adjacent first connecting parts (112) are staggered along a second direction (B), the second direction (B) being perpendicular to the first direction (A); the first connecting parts (112) are arranged One end is connected to the main body (111), and a first notch (114) is formed at the connection between the other end of the first connecting part (112) and the main body (111); a plurality of first stress release grooves (113) correspond to a plurality of first connecting parts (112) one by one, the first stress release grooves (113) surround an end of the corresponding first connecting part (112) away from the electrical connector (12), and at least a portion of the first stress release grooves (113) is arranged opposite to the first notch (114) along the first direction (A).

2. The sampling structure (10) according to claim 1, characterized in that: The first stress release groove (113) surrounds the other end of the electrical connector (12).

3. The sampling structure (10) according to claim 2, characterized in that: The sampling plate (11) further comprises a plurality of second notches (116), a plurality of second stress release grooves (117) and a plurality of second connecting parts (115); at least one second connecting part (115) is provided at two opposite ends of the main body (111) along the second direction (B); one end of each second connecting part (115) is connected to the main body (111); each second connecting part (115) is correspondingly connected to the other end of one of the electrical connectors (12); the plurality of second notches (116) correspond one-to-one to the plurality of second connecting parts (115); the second notches (116) are located on one side of the corresponding second connecting part (115); the second stress release groove (117) surrounds the second connecting part (115); the second stress release groove (117) is connected to the second notch (116).

4. The sampling structure (10) according to claim 3, characterized in that: The main body (111) comprises a first end (1111), the first end (1111) being an end of the main body (111) along the second direction (B), the first end (1111) being connected to the other end of the electrical connector (12); along the first direction (A), two opposite sides of the first end (1111) are respectively provided with a second notch (116).

5. The sampling structure (10) according to claim 4, characterized in that: Along the first direction (A), two opposite sides of the first end (1111) are respectively provided with a second connection portion (115); along the second direction (B), two second connection portions (115) located on both sides of the first end (1111) are at least partially staggered.

6. The sampling structure (10) according to any one of claims 1 to 5, characterized in that: The sampling plate (11) is also provided with a matching hole (118), the matching hole passing through the main body (111), and the matching hole (118) is used to fix the sampling plate (11) to the first bracket (20) of the battery module (100).

7. A battery module (100), characterized in that: The battery module (100) comprises the sampling structure (10) according to any one of claims 1 to 6 and a plurality of battery cells (40), and the first connecting portion (112) is connected to the battery cells (40) through the electrical connector (12).

8. The battery module (100) according to claim 7, characterized in that: The battery module (100) further comprises a first bracket (20) and a support platform (50); the first bracket (20) is sleeved on the battery cell (40) and is at least partially located on one side of the battery cell (40) along a third direction (C); the third direction (C), the first direction (A) and the second direction (B) are perpendicular to each other; the support platform (50) is protruding from one side of the first bracket (20) away from the battery cell (40) along the third direction (C); the support platform (50) supports the sampling plate (11) and is connected and fixed to the sampling plate (11).

9. The battery module (100) according to claim 8, characterized in that: The battery module (100) further comprises a fixing member (60), wherein the fixing member (60) is protruded from the support platform (50) along the third direction (C), and the fixing member (60) is connected and fixed in cooperation with the matching hole (118) of the sampling plate (11).

10. The battery module (100) according to claim 8, characterized in that: Along the first direction (A), there is a distance between the first connection portion (112) and a side of the support platform (50) close to the first connection portion (112), and between the second connection portion (115) and a side of the support platform (50) close to the second connection portion (115).

11. The battery module (100) according to claim 8, characterized in that: There are a plurality of battery cells (40), and the battery module (100) comprises a plurality of tabs (70), wherein one tab (70) corresponds to connecting one battery cell (40) and one electrical connector (12).

12. The battery module (100) according to claim 11, characterized in that: The battery module (100) further comprises a plurality of partitions (80), wherein the plurality of partitions (80) are protrudingly arranged along the third direction (C) on a side of the first bracket (20) facing away from the battery cell (40), and a partition (80) is arranged between two adjacent tabs (70).

13. The battery module (100) according to claim 11, characterized in that: The battery module (100) further comprises a limiting member (90), wherein the limiting member (90) is protrudingly arranged along the third direction (C) on a side of the first bracket (20) facing away from the battery cell (40), and the tab (70) is provided with a limiting portion (71), wherein the limiting portion (71) cooperates with the limiting member (90) so that the tab (70) is limited in the radial direction of the battery cell (40).

14. An energy storage device (1000), characterized in that: Comprising the battery module (100) as claimed in any one of claims 7 to 13.

15. An electrical equipment, characterized in that: Comprising the energy storage device (1000) as claimed in claim 14.

Images