Battery module, battery pack and electric device

Abstract

The invention provides a battery module, a battery pack and an electric device, and relates to the technical field of batteries. The battery module comprises a plurality of battery modules and a plurality of series electric connecting pieces, the plurality of battery modules are arranged in a first direction, and each battery module comprises a plurality of protective plates oppositely arranged in the first direction and soft package batteries located between every two adjacent protective plates; a plurality of elastic electric connecting pieces which are oppositely arranged along the second direction are arranged on each protective plate, and each tab of the soft package battery is clamped between two adjacent elastic electric connecting pieces along the first direction so as to realize electric connection. The polarities of the two adjacent tabs in the first direction are opposite, and the two sides, in the first direction, of each series electric connecting piece abut against the elastic electric connecting pieces of the two adjacent battery modules respectively, so that the two adjacent battery modules are connected in series. According to the battery module provided by the invention, any one soft package battery can be conveniently disassembled and replaced, and the maintenance difficulty of the battery module is reduced.

Description

Technical Field

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

[0002] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art.

[0003] At present, in the production process of soft-pack battery modules, a bar is usually used as a current-carrying part to be welded to the tabs of two adjacent soft-pack batteries, so as to realize the connection of multiple soft-pack batteries in series. However, if a soft-pack battery fails during use, it is not convenient to disassemble and replace the soft-pack battery alone, and even the entire battery module needs to be replaced, making the maintenance of the battery module more difficult. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a battery module, a battery pack and an electrical device, aiming to solve the technical problem of connecting multiple soft-pack batteries in series by welding tabs, which makes the battery module difficult to repair.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery module having a first direction and a second direction intersecting the first direction, the battery module comprising:

[0007] A plurality of battery modules are arranged along the first direction, each of the battery modules comprises a plurality of guard plates arranged opposite to each other along the first direction and a soft-pack battery located between two adjacent guard plates, the soft-pack battery has a plurality of pole ears arranged opposite to each other along the second direction, each guard plate is provided with a plurality of elastic electrical connectors arranged opposite to each other along the second direction, each pole ear is sandwiched between two adjacent elastic electrical connectors along the first direction, so that each pole ear is electrically connected to the two adjacent elastic electrical connectors along the first direction respectively;

[0008] A plurality of series electrical connectors, wherein the polarities of two adjacent pole ears along the first direction are opposite, each of the series electrical connectors is arranged between two adjacent battery modules, and each of the series electrical connectors abuts against the elastic electrical connectors of two adjacent battery modules on both sides along the first direction respectively, so as to connect the two adjacent battery modules in series.

[0009] In one of the embodiments of the first aspect, the elastic electrical connector includes a connecting portion and a bending portion that are connected to each other, the connecting portion is detachably connected to the protective plate, and at least a portion of the bending portion is bent toward the pole ear and abuts against a side of the pole ear close to the bending portion.

[0010] In one of the embodiments of the first aspect, the bending portion includes a plurality of first bending sections and at least one second bending section, the plurality of first bending sections are arranged at intervals, each second bending section is respectively connected to two adjacent first bending sections, and each two adjacent first bending sections and one second bending section enclose a heat dissipation gap.

[0011] In one of the embodiments of the first aspect, a limiting groove is provided on the guard plate, and the connecting portion is snapped into the limiting groove.

[0012] In one of the embodiments of the first aspect, the limiting groove includes a first groove body and a second groove body, the first groove body and the second groove body are connected along the second direction to form a step shape, and the connecting part includes a first connecting body and a second connecting body connected to each other, the first connecting body is located in the first groove body, and the second connecting body is located in the second groove body.

[0013] In one embodiment of the first aspect, each of the battery modules further includes an elastic compression member, the elastic compression member includes a compression portion and a force transmission portion connected to each other, the compression portion is located between the soft-pack battery and the guard plate, the force transmission portion is connected to the elastic electrical connector, and the elastic electrical connector is located between the force transmission portion and the series electrical connector;

[0014] When the compression portion is compressed by the expansion of the soft-pack battery, the compression portion contracts in the first direction and stretches in the second direction, so as to drive the force transmission portion to move in the first direction away from the pole ear, thereby compressing the elastic electrical connector.

[0015] In one embodiment of the first aspect, the compression portion is provided with a plurality of grooves spaced apart along the second direction, the notches of a portion of the plurality of grooves are arranged toward the soft-pack battery, and the notches of another portion of the plurality of grooves are arranged away from the soft-pack battery, the soft-pack battery has a middle area, a size of each of the grooves along the second direction is a width of each of the grooves, and among the plurality of grooves, the width of the groove close to or located in the middle area is greater than the width of the groove away from the middle area.

[0016] In one of the embodiments of the first aspect, an inclined force transmission surface is provided on the force transmission portion, the elastic electrical connector includes a bent portion abutting against the pole ear, an inclined force-bearing surface is provided on the bent portion, and the force transmission surface abuts against the force-bearing surface.

[0017] In one of the embodiments of the first aspect, the battery module also includes a side plate, on which are disposed a plurality of first card slots and a plurality of second card slots, the plurality of first card slots being spaced apart along the first direction, each of the second card slots being respectively connected to two adjacent first card slots, each of the series electrical connectors being respectively located in two adjacent first card slots and in a second card slot connecting two adjacent first card slots, and in each of the battery modules, the tab is located in the first slot, and the portion of the elastic electrical connector abutting against the tab is located in the first slot.

[0018] In one of the embodiments of the first aspect, the battery module further has a third direction, which intersects with the first direction and the second direction respectively, and the battery module also includes a limit member, on which a plurality of limit portions are arranged at intervals along the first direction and are located on one side of the pole ear along the third direction, each of the limit portions is respectively penetrated through two adjacent first card slots and a second card slot connecting the two adjacent first card slots, and each of the limit portions is respectively abutted against one of the series electrical connectors and the elastic electrical connectors of two adjacent battery modules.

[0019] In one embodiment of the first aspect, a heat dissipation channel and a plurality of ventilation holes are provided on the side panel, the heat dissipation channel extends along the first direction and passes through the side panel, the plurality of ventilation holes are spaced apart along the first direction, and each of the ventilation holes is respectively connected to the heat dissipation channel and one of the first card slots.

[0020] In a second aspect, an embodiment of the present application provides a battery pack, comprising the battery module described in any embodiment of the first aspect above.

[0021] In a third aspect, an embodiment of the present application provides an electrical device, comprising the battery pack described in any embodiment of the second aspect above.

[0022] The beneficial effects of this application are as follows:

[0023] The battery module provided by the present application includes a plurality of battery modules and a plurality of series electrical connectors. The plurality of battery modules are arranged in a first direction. Each battery module includes a plurality of shields arranged relatively along the first direction and a soft-pack battery located between two adjacent shields. Each shield is provided with a plurality of elastic electrical connectors arranged relatively along the second direction. Each pole ear of the soft-pack battery is clamped between two adjacent elastic electrical connectors along the first direction, so that the elastic electrical connector is used as a current-carrying member. At the same time, the polarities of the two adjacent pole ears along the first direction are opposite. Both sides of each series electrical connector along the first direction are respectively abutted against the elastic electrical connectors of two adjacent battery modules, so that two adjacent battery modules are connected in series. In this way, multiple soft-pack batteries can be connected in series without welding, and any one of the soft-pack batteries can be disassembled and replaced separately without replacing the entire battery module, thereby reducing the difficulty of repairing the battery module.

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and understandable, preferred embodiments are specifically listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a battery module in one embodiment of the present application is shown;

[0027] Figure 2 A schematic diagram of a three-dimensional exploded structure of a battery module in one embodiment of the present application is shown;

[0028] Figure 3 A schematic diagram of the structure of a battery module from one perspective in one embodiment of the present application is shown;

[0029] Figure 4 Shows Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0030] Figure 5 Shows Figure 3 Schematic diagram of the cross-sectional structure at the middle BB;

[0031] Figure 6 Shows Figure 5 Schematic diagram of the enlarged structure of the C region;

[0032] Figure 7A schematic diagram of the three-dimensional structure of a battery module in one embodiment of the present application is shown;

[0033] Figure 8 A schematic diagram of a three-dimensional exploded structure of a battery module in one embodiment of the present application is shown;

[0034] Fig. 9 Shows Figure 8 Schematic diagram of the enlarged structure of the D region in the middle;

[0035] Fig.10 Another schematic diagram of a three-dimensional exploded structure of a battery module in one embodiment of the present application is shown;

[0036] Fig.11 Shows Fig.10 Schematic diagram of the enlarged structure of the middle E area;

[0037] Fig.12 A schematic diagram of the structure of a battery module from one perspective in one embodiment of the present application is shown;

[0038] Fig.13 Shows Fig.12 Schematic diagram of the cross-sectional structure at FF in the middle;

[0039] Fig.14 Shows Fig.13 Schematic diagram of the enlarged structure of the middle G region;

[0040] Fig.15 A schematic diagram of the three-dimensional structure of an elastic electrical connector in one embodiment of the present application is shown;

[0041] Fig.16 The three-dimensional structure of the elastic electrical connector in another embodiment of the present application is shown;

[0042] Fig.17 A schematic diagram of the three-dimensional structure of an elastic compression member in one embodiment of the present application is shown;

[0043] Fig.18 A schematic diagram of the three-dimensional structure of a side panel in one embodiment of the present application is shown;

[0044] Fig.19 A schematic diagram of the three-dimensional structure of a limiting member in an embodiment of the present application is shown.

[0045] Description of main component symbols:

[0046] 1000-battery module; 100-battery module; 110-protective plate; 111-limiting groove; 1111-first groove body; 1112-second groove body; 130-soft pack battery; 131-ear; 132-middle area; 140-elastic electrical connector; 141-connecting part; 1411-first connecting body; 1412-second connecting body; 142-bending part; 1421-first bending section; 1422-second bending section; 1422 1-force-bearing surface; 143-heat dissipation gap; 160-frame; 170-elastic compression member; 171-compression part; 1711-groove; 172-force transmission part; 1721-force transmission surface; 200-series electrical connector; 300-side plate; 310-first card slot; 320-second card slot; 330-heat dissipation channel; 340-ventilation hole; 400-limiting member; 410-limiting part; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0047] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0048] In the description of the present application, terms such as "center", "longitudinal", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In addition, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this application, the terms "first", "second", etc. are used to distinguish different objects and cannot be understood as indicating or implying a specific order or a primary and secondary relationship, or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the description of this application, the term "and / or" indicates that there may be three relationships. For example, A and / or B may indicate that A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0053] In the description of this application, "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "perpendicular" also includes not only the absolutely perpendicular situation, but also the roughly perpendicular situation conventionally recognized in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0054] At present, in the production process of soft-pack battery modules, a bar is usually used as a current-carrying part to be welded to the tabs of two adjacent soft-pack batteries, so as to realize the connection of multiple soft-pack batteries in series. However, if a soft-pack battery fails during use, it is not convenient to disassemble and replace the soft-pack battery alone, and even the entire battery module needs to be replaced, making the maintenance of the battery module more difficult.

[0055] In addition, the inventors of this application also discovered the following problems during the research and development process: 1. As the battery module is used, the soft-pack battery is prone to expansion. If the expansion cannot be discovered in time and the battery cannot be disassembled and replaced, the risk of thermal runaway will increase. 2. The heat in the battery module is difficult to dissipate, which affects the performance of the battery module and increases the risk of thermal runaway.

[0056] In order to solve the above technical problems, Figures 1 to 3As shown, in the first aspect, an embodiment of the present application provides a battery module 1000, which relates to the field of battery technology and is mainly used in a battery pack, and thus is used in an electrical device in the form of a battery pack.

[0057] Combination Figure 7 and Figure 8 As shown, the battery module 1000 provided in this embodiment has a first direction X and a second direction Y intersecting the first direction X. The battery module 1000 includes a plurality of battery modules 100 and a plurality of series electrical connectors 200 .

[0058] Among them, a plurality of battery modules 100 are arranged in a row along a first direction X, each battery module 100 includes two guard plates 110 arranged oppositely along the first direction X and a soft-pack battery 130 located between the two guard plates 110, the soft-pack battery 130 has two pole ears 131 arranged oppositely along a second direction Y, each guard plate 110 is provided with two elastic electrical connectors 140 arranged oppositely along the second direction Y, each pole ear 131 is sandwiched between two elastic electrical connectors 140 adjacent to each other along the first direction X, so that each pole ear 131 is respectively electrically connected to the two elastic electrical connectors 140 adjacent to each other along the first direction X. The polarities of the two adjacent pole ears 131 along the first direction X are opposite, each serial electrical connector 200 is arranged between two adjacent battery modules 100, and each serial electrical connector 200 is respectively abutted against the elastic electrical connectors 140 of the two adjacent battery modules 100 on both sides along the first direction X, so as to connect the two adjacent battery modules 100 in series.

[0059] Exemplarily, the tab 131 may be a positive tab or a negative tab, and no specific limitation is imposed on the type of the tab 131. It should be noted that the above “the polarities of the two tabs 131 adjacent to each other along the first direction X are opposite” may be understood as: among the two tabs 131 adjacent to each other along the first direction X, one of the tabs 131 is a positive tab and the other of the tabs 131 is a negative tab.

[0060] It can be understood that the battery module 1000 provided in this embodiment includes a plurality of battery modules 100 and a plurality of series electrical connectors 200, the plurality of battery modules 100 are arranged along a first direction X, each battery module 100 includes two guard plates 110 arranged opposite to each other along the first direction X and a soft-pack battery 130 located between the two guard plates 110, each guard plate 110 is provided with two elastic electrical connectors 140 arranged opposite to each other along the second direction Y, each pole ear 131 of the soft-pack battery 130 is sandwiched between two elastic electrical connectors 140 adjacent to each other along the first direction X, so that the elastic electrical connector 140 is used as a current-carrying member, and at the same time, the polarities of the two adjacent pole ears 131 along the first direction X are opposite, and each series electrical connector 200 is respectively abutted against the elastic electrical connectors 140 of two adjacent battery modules 100 on both sides along the first direction X, so that the two adjacent battery modules 100 are connected in series. In this way, multiple soft-pack batteries 130 can be connected in series without welding, and any one of the soft-pack batteries 130 can be easily disassembled and replaced without replacing the entire battery module 1000, thereby reducing the difficulty of repairing the battery module 1000.

[0061] In addition, the two protective plates 110 are provided to protect the soft-pack battery 130 and facilitate the installation of the elastic electrical connector 140. Figure 7 , Figure 8 and Fig.10 As shown, further, each battery module 100 may also include a frame 160 , which is disposed outside the soft-pack battery 130 and connected between the two guard plates 110 to further protect the soft-pack battery 130 .

[0062] It should be noted that the number of the protective plates 110 can be greater than two, wherein at least two of the multiple protective plates 110 are arranged oppositely along the first direction X, and the soft-pack battery 130 is located between two adjacent protective plates 110. More than two elastic electrical connectors 140 can be provided on the two protective plates 110 adjacent to the soft-pack battery 130, wherein at least two of the multiple elastic electrical connectors 140 are arranged oppositely along the second direction Y. In each soft-pack battery 130, the number of the tabs 131 can also be set to be greater than two, wherein at least two tabs 131 are arranged oppositely along the second direction Y, and the polarities of the tabs 131 located on the same side of the second direction Y are the same.

[0063] like Figure 3 as well as Figures 5 to 11 As shown, in one embodiment, the elastic electrical connector 140 includes a connecting portion 141 and a bending portion 142 that are connected to each other, the connecting portion 141 is detachably connected to the protective plate 110, and at least a portion of the bending portion 142 is bent toward the pole ear 131 and abuts against a side of the pole ear 131 close to the bending portion 142.

[0064] Exemplarily, the detachable connection may further be a snap connection, a screw connection, an interference fit, etc., which is not specifically limited here.

[0065] It is understandable that, since the elastic electrical connector 140 is detachably connected to the guard plate 110 through the connecting portion 141, it is convenient to replace and repair the elastic electrical connector 140 separately. At the same time, through the setting of the bending portion 142, an elastic force can be generated to enable the two elastic electrical connectors 140 to stably clamp the tab 131 together, thereby increasing the reliability of the electrical connection between the tab 131 and the elastic electrical connector 140.

[0066] like Fig.15 and Fig.16 As shown, further, the bending portion 142 includes a plurality of first bending sections 1421 and at least one second bending section 1422, the plurality of first bending sections 1421 are arranged at intervals, each second bending section 1422 is respectively connected to two adjacent first bending sections 1421, and each two adjacent first bending sections 1421 and one second bending section 1422 enclose a heat dissipation gap 143.

[0067] It can be understood that, since the plurality of first bending segments 1421 are arranged at intervals, each second bending segment 1422 is respectively connected to two adjacent first bending segments 1421, so that Fig.15 and Fig.16 The bending shape shown is such that every two adjacent first bending sections 1421 and one second bending section 1422 enclose a heat dissipation gap 143. The setting of the heat dissipation gap 143 facilitates the evacuation of the heat generated by the soft-pack battery 130 and the elastic electrical connector 140, thereby reducing the possibility of thermal runaway of the battery module 1000.

[0068] like Figure 8 and Fig.10 As shown, further, a limiting groove 111 is provided on the guard plate 110 , and the connecting portion 141 is snap-connected at the limiting groove 111 .

[0069] It is understandable that, since the connecting portion 141 is snap-fitted into the limiting groove 111 , a detachable connection between the elastic electrical connector 140 and the guard plate 110 is achieved, which facilitates replacement and maintenance of the elastic electrical connector 140 alone.

[0070] like Figures 9 to 12As shown, further, the limiting groove 111 includes a first groove body 1111 and a second groove body 1112, and the first groove body 1111 and the second groove body 1112 are connected along the second direction Y to form a step shape, and the connecting part 141 includes a first connecting body 1411 and a second connecting body 1412 connected to each other, and the first connecting body 1411 is located in the first groove body 1111, and the second connecting body 1412 is located in the second groove body 1112.

[0071] It can be understood that since the first slot body 1111 and the second slot body 1112 are connected to form a step shape, the first connecting body 1411 is located in the first slot body 1111, and the second connecting body 1412 is located in the second slot body 1112. This can limit the movement of the elastic electrical connector 140 relative to the protective plate 110 along the second direction Y, so that the two elastic electrical connectors 140 can stably clamp the pole ear 131 to achieve reliable electrical connection.

[0072] It should be noted that, for the above-mentioned embodiment in which the elastic electrical connector 140 includes a connecting portion 141 and a bending portion 142, the elastic electrical connector 140 may also include a connecting portion 141 and an elastic portion that are connected to each other, and the connecting portion 141 is detachably connected to the protective plate 110, and the elastic portion is a spring or a spring, thereby also being able to utilize elastic force to stably clamp the pole ear 131 for electrical connection, and no specific restrictions are made to the structure of the elastic electrical connector 140 herein.

[0073] like Figure 12 to Figure 14 As shown, in one embodiment, each battery module 100 also includes an elastic compression member 170, the elastic compression member 170 includes a compression portion 171 and a force transmission portion 172 connected to each other, the compression portion 171 is located between the soft-pack battery 130 and the protective plate 110, the force transmission portion 172 is connected to the elastic electrical connector 140, and the elastic electrical connector 140 is located between the force transmission portion 172 and the series electrical connector 200. When the compression portion 171 is squeezed by the expansion of the soft-pack battery 130, the compression portion 171 contracts in the first direction X and stretches in the second direction Y, so as to drive the force transmission portion 172 to move in the first direction X in a direction away from the pole ear 131, thereby compressing the elastic electrical connector 140, thereby reducing the fit between the elastic electrical connector 140 and the pole ear 131, which can increase the internal resistance between the elastic electrical connector 140, and the internal resistance is positively correlated with the expansion force of the soft-pack battery 130, that is, as the expansion force increases, the internal resistance will also increase, and the expansion condition of the soft-pack battery 130 can be judged by detecting the change in the internal resistance, so as to determine whether the soft-pack battery 130 needs to be disassembled and replaced, thereby reducing the risk of thermal runaway of the battery module 1000.

[0074] Exemplarily, the connection between the force transmission portion 172 and the elastic electrical connector 140 may be abutment, welding, riveting, screw connection, clamping, etc., and no specific limitation is made herein.

[0075] like Fig.13 , Fig.14 and Fig.17 As shown, further, the compression part 171 is provided with a plurality of grooves 1711 arranged at intervals along the second direction Y, the notches of a part of the plurality of grooves 1711 are arranged toward the soft-pack battery 130, and the notches of another part of the plurality of grooves 1711 are arranged away from the soft-pack battery 130, and the soft-pack battery 130 has a middle area 132, and the size of each groove 1711 along the second direction Y is the width of each groove 1711. Among the plurality of grooves 1711, the width of the groove 1711 close to or located in the middle area 132 is greater than the width of the groove 1711 away from the middle area 132, so that the two ends of the compression part 171 along the second direction Y have a larger stiffness and a smaller stiffness in the middle, which is similar to the expansion form of the soft-pack battery 130 (the expansion rate of the middle area 132 is large, and the expansion rate of the two end areas is small), so that the middle position of the compression part 171 is easy to deform, so that it is easy to transmit the force generated by the deformation to the force transmission part 172.

[0076] like Figure 8 , Fig. 9 and Fig.14 As shown, further, an inclined force transmission surface 1721 is provided on the force transmission portion 172, and the elastic electrical connector 140 includes a bending portion 142 abutting against the pole ear 131, and an inclined force-bearing surface 14221 is provided on the bending portion 142, and the force transmission surface 1721 abuts against the force-bearing surface 14221, so that the force transmission portion 172 is in stable contact with the elastic electrical connector 140, and it is easy to transmit the force generated by the deformation of the compression portion 171 to the elastic electrical connector 140, so that the elastic electrical connector 140 is compressed under the action of the force transmission portion 172, thereby generating a change in internal resistance.

[0077] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Fig.18 As shown, in one embodiment, the battery module 1000 also includes a side plate 300, and a plurality of first card slots 310 and a plurality of second card slots 320 are arranged on the side plate 300, the plurality of first card slots 310 are arranged at intervals along the first direction X, and each second card slot 320 is respectively connected to two adjacent first card slots 310, and each series electrical connector 200 is respectively located in two adjacent first card slots 310 and in a second card slot 320 connecting the two adjacent first card slots 310. In each battery module 100, the pole ear 131 is located in the first card slot 310, and the portion of the first elastic electrical connector 140 abutting against the pole ear 131 is located in the first card slot 310.

[0078] It is understandable that, by setting the first slot 310 , the elastic electrical connector 140 can be restricted from moving in the first direction X away from the pole lug 131 , so that the two elastic electrical connectors 140 can stably clamp the pole lug 131 to increase the reliability of the electrical connection between the pole lug 131 and the elastic electrical connector 140 .

[0079] At the same time, through the arrangement of the second slot 320 and the second slot 320 , the two can jointly restrict the series electrical connector 200 from moving relative to the elastic electrical connector 140 along the second direction Y, so as to increase the reliability of the electrical connection between the series electrical connector 200 and the elastic electrical connector 140 .

[0080] like Figure 1 , Figure 2 , Figure 6 , Fig.18 and Fig.19 As shown, further, the battery module 1000 also has a third direction Z, which intersects the first direction X and the second direction Y respectively. The battery module 1000 also includes a limiter 400, on which a plurality of limiters 410 are arranged, and the plurality of limiters 410 are arranged at intervals along the first direction X and are located on one side of the pole ear 131 along the third direction Z. Each limiter 410 is respectively arranged to penetrate two adjacent first card slots 310 and a second card slot 320 connecting the two adjacent first card slots 310, and each The limiting portion 410 respectively abuts against a series electrical connector 200 and the elastic electrical connectors 140 of two adjacent battery modules 100, that is, one limiting portion 410 corresponds to two first slots 310 and one second slot 320, thereby abutting against a series electrical connector 200 and four elastic electrical connectors 140, and then cooperates with the side plate 300 to limit the movement of a series electrical connector 200 and four elastic electrical connectors 140 relative to the side plate 300 along the third direction Z, so as to further increase the reliability of the electrical connection.

[0081] Exemplarily, when the battery module 1000 has a length, a width, and a height, the first direction X is the length direction of the battery module 1000, the second direction Y is the width direction of the battery module 1000, and the third direction Z is the height direction of the battery module 1000, that is, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0082] like Figure 3 , Figure 4 and Fig.18 As shown, further, a heat dissipation channel 330 and a plurality of vents 340 are provided on the side plate 300, the heat dissipation channel 330 extends along the first direction X and penetrates the side plate 300, and the plurality of vents 340 are spaced apart along the first direction X, and each vent 340 is respectively connected to the heat dissipation channel 330 and a first card slot 310.

[0083] It can be understood that since the heat dissipation channel 330 extends along the first direction X and penetrates the side plate 300, the multiple vents 340 are arranged at intervals along the first direction X, and each vent 340 is respectively connected to the heat dissipation channel 330 and a first card slot 310, so that the battery module 1000 can be connected to the external environment, thereby increasing the efficiency of heat exchange, so as to timely evacuate the heat generated in the battery module 1000, thereby improving the performance and safety of the battery module 1000.

[0084] In a second aspect, an embodiment of the present application provides a battery pack, comprising the battery module 1000 in any embodiment of the first aspect described above.

[0085] It can be understood that since the battery pack provided in this embodiment has the battery module 1000 in any embodiment of the first aspect above, it has all the beneficial effects of the battery module 1000, which will not be described one by one here.

[0086] In a third aspect, an embodiment of the present application provides an electrical device, comprising the battery pack in any embodiment of the second aspect above.

[0087] It should be noted that electrical devices may be vehicles, ships, spacecraft, mobile phones, portable devices, laptops, electric toys and electric tools, etc. Vehicles may be fuel vehicles, gas vehicles, new energy vehicles, etc. New energy vehicles may be pure electric vehicles, hybrid vehicles and extended-range vehicles, etc. Spacecraft may be airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools may be metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. No specific restrictions are made on the types of electrical devices.

[0088] It can be understood that since the electrical device provided in this embodiment has the battery pack in any embodiment of the second aspect mentioned above, it has all the beneficial effects of the battery pack, which will not be described in detail here.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0090] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery module, characterized in that: Having a first direction (X) and a second direction (Y) intersecting the first direction (X), the battery module comprises: A plurality of battery modules (100) are arranged along the first direction (X), each of the battery modules (100) comprising a plurality of protective plates (110) arranged relatively to each other along the first direction (X) and a soft-pack battery (130) located between two adjacent protective plates (110), the soft-pack battery (130) having a plurality of pole ears (131) arranged relatively to each other along the second direction (Y), each of the protective plates (110) being provided with a plurality of elastic electrical connectors (140) arranged relatively to each other along the second direction (Y), each of the pole ears (131) being sandwiched between two adjacent elastic electrical connectors (140) along the first direction (X), so that each of the pole ears (131) is electrically connected to the two adjacent elastic electrical connectors (140) along the first direction (X); A plurality of series electrical connectors (200), wherein the polarities of two adjacent pole ears (131) along the first direction (X) are opposite, and each of the series electrical connectors (200) is disposed between two adjacent battery modules (100), and each of the series electrical connectors (200) is respectively abutted against the elastic electrical connectors (140) of two adjacent battery modules (100) on both sides along the first direction (X) to connect the two adjacent battery modules (100) in series.

2. The battery module according to claim 1, characterized in that: The elastic electrical connector (140) comprises a connecting portion (141) and a bending portion (142) connected to each other, wherein the connecting portion (141) is detachably connected to the protective plate (110), and at least a portion of the bending portion (142) is bent toward the pole lug (131) and abuts against a side of the pole lug (131) close to the bending portion (142).

3. The battery module according to claim 2, characterized in that: The bending portion (142) comprises a plurality of first bending sections (1421) and at least one second bending section (1422), the plurality of first bending sections (1421) are arranged at intervals, each second bending section (1422) is respectively connected to two adjacent first bending sections (1421), and each two adjacent first bending sections (1421) and one second bending section (1422) enclose a heat dissipation gap (143).

4. The battery module according to claim 2, characterized in that: A limiting groove (111) is provided on the guard plate (110), and the connecting portion (141) is snap-connected to the limiting groove (111).

5. The battery module according to claim 4, characterized in that: The limiting groove (111) comprises a first groove body (1111) and a second groove body (1112), wherein the first groove body (1111) and the second groove body (1112) are connected along the second direction (Y) to form a step shape, and the connecting portion (141) comprises a first connecting body (1411) and a second connecting body (1412) connected to each other, wherein the first connecting body (1411) is located in the first groove body (1111), and the second connecting body (1412) is located in the second groove body (1112).

6. The battery module according to any one of claims 1 to 5, characterized in that: Each of the battery modules (100) further comprises an elastic compression member (170), wherein the elastic compression member (170) comprises a compression portion (171) and a force transmission portion (172) connected to each other, wherein the compression portion (171) is located between the soft-pack battery (130) and the protective plate (110), and the force transmission portion (172) is connected to the elastic electrical connector (140), and the elastic electrical connector (140) is located between the force transmission portion (172) and the series electrical connector (200); When the compression portion (171) is expanded and squeezed by the soft-pack battery (130), the compression portion (171) contracts in the first direction (X) and stretches in the second direction (Y), so as to drive the force transmission portion (172) to move in the first direction (X) away from the pole ear (131), thereby compressing the elastic electrical connector (140).

7. The battery module according to claim 6, characterized in that: The compression portion (171) is provided with a plurality of grooves (1711) arranged at intervals along the second direction (Y), the notches of a portion of the plurality of grooves (1711) are arranged toward the soft-pack battery (130), and the notches of another portion of the plurality of grooves (1711) are arranged away from the soft-pack battery (130), the soft-pack battery (130) has a middle area (132), the size of each groove (1711) along the second direction (Y) is the width of each groove (1711), and among the plurality of grooves (1711), the width of the groove (1711) close to or located in the middle area (132) is greater than the width of the groove (1711) away from the middle area (132).

8. The battery module according to claim 6, characterized in that: The force transmission portion (172) is provided with an inclined force transmission surface (1721), the elastic electrical connector (140) includes a bent portion (142) abutting against the pole ear (131), the bent portion (142) is provided with an inclined force bearing surface (14221), and the force transmission surface (1721) abuts against the force bearing surface (14221).

9. The battery module according to any one of claims 1 to 5, characterized in that: The battery module also includes a side plate (300), on which a plurality of first card slots (310) and a plurality of second card slots (320) are provided, wherein the plurality of first card slots (310) are arranged at intervals along the first direction (X), and each of the second card slots (320) is respectively connected to two adjacent first card slots (310), and each of the series electrical connectors (200) is respectively located in two adjacent first card slots (310) and in a second card slot (320) connected to two adjacent first card slots (310). In each of the battery modules (100), the pole lug (131) is located in the first card slot (310), and the portion of the elastic electrical connector (140) abutting against the pole lug (131) is located in the first card slot (310).

10. The battery module according to claim 9, characterized in that: The battery module also has a third direction (Z), and the third direction (Z) intersects with the first direction (X) and the second direction (Y) respectively. The battery module also includes a limiting member (400), and a plurality of limiting portions (410) are arranged on the limiting member (400). The plurality of limiting portions (410) are arranged at intervals along the first direction (X) and are located on one side of the pole ear (131) along the third direction (Z). Each of the limiting portions (410) is respectively arranged to penetrate two adjacent first card slots (310) and a second card slot (320) connecting the two adjacent first card slots (310). Each of the limiting portions (410) is respectively abutted against one of the series electrical connectors (200) and the elastic electrical connectors (140) of two adjacent battery modules (100).

11. The battery module according to claim 9, characterized in that: The side plate (300) is provided with a heat dissipation channel (330) and a plurality of vent holes (340); the heat dissipation channel (330) is extended along the first direction (X) and penetrates the side plate (300); the plurality of vent holes (340) are arranged at intervals along the first direction (X); and each vent hole (340) is respectively connected to the heat dissipation channel (330) and one of the first card slots (310).

12. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 11.

13. An electrical device, characterized in that: A battery pack comprising the battery pack of claim 12.

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