A battery module, a battery pack, and an electrical device.

Abstract

This application provides a battery module, a battery pack, and an electrical device, relating to the field of battery technology. The battery module includes multiple battery modules and multiple series electrical connectors. The multiple battery modules are arranged along a first direction. Each battery module includes multiple protective plates arranged opposite each other along the first direction and a pouch battery located between two adjacent protective plates. Each protective plate is provided with multiple elastic electrical connectors arranged opposite each other along a second direction. Each tab of the pouch battery is sandwiched between two adjacent elastic electrical connectors along the first direction to achieve electrical connection. The polarities of two adjacent tabs along the first direction are opposite. The two sides of each series electrical connector along the first direction respectively abut against the elastic electrical connectors of two adjacent battery modules to achieve series connection between two adjacent battery modules. The battery module provided by this application facilitates the disassembly and replacement of any pouch battery, reducing the maintenance difficulty of the battery module.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module, battery pack and power supply device. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Currently, in the production process of pouch battery modules, tabs are typically used as current-carrying components and welded to the tabs of two adjacent pouch batteries to connect multiple pouch batteries in series. However, if a pouch battery malfunctions during use, it is not convenient to disassemble and replace that battery individually; sometimes, the entire battery module may need to be replaced, making battery module repair quite difficult. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a battery module, battery pack and power device, which aims to solve the technical problem that the battery module is difficult to repair because multiple soft-pack batteries are connected in series by welding tabs.

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

[0006] In a first aspect, embodiments of this application provide a battery module having a first direction and a second direction intersecting the first direction, the battery module comprising:

[0007] Multiple battery modules are arranged along a first direction. Each battery module includes multiple protective plates arranged opposite each other along the first direction and a soft-pack battery located between two adjacent protective plates. The soft-pack battery has multiple tabs arranged opposite each other along a second direction. Each protective plate is provided with multiple elastic electrical connectors arranged opposite each other along the second direction. Each tab is sandwiched between two adjacent elastic electrical connectors along the first direction, so that each tab is electrically connected to the two adjacent elastic electrical connectors along the first direction.

[0008] Multiple series electrical connectors are provided, with the polarities of two adjacent tabs along the first direction being opposite. Each series electrical connector is disposed between two adjacent battery modules, and each series electrical connector abuts against the elastic electrical connectors of the two adjacent battery modules on both sides along the first direction to connect the two adjacent battery modules in series.

[0009] In one embodiment of the first aspect, the resilient electrical connector includes a connecting portion and a bent portion connected together, the connecting portion being detachably connected to the protective plate, and at least a portion of the bent portion being bent toward the electrode tab and abutting against the side of the electrode tab near the bent portion.

[0010] In one embodiment of the first aspect, the bending portion includes a plurality of first bending segments and at least one second bending segment, the plurality of first bending segments are spaced apart, each second bending segment is connected to two adjacent first bending segments, and each pair of adjacent first bending segments and one second bending segment enclose a heat dissipation gap.

[0011] In one embodiment of the first aspect, the protective plate is provided with a limiting groove, and the connecting part is engaged with the limiting groove.

[0012] In one embodiment of the first aspect, the limiting groove includes a first groove and a second groove, the first groove and the second groove being connected along the second direction to form a stepped shape, and the connecting part includes a first connector and a second connector connected to each other, the first connector being located in the first groove and the second connector being located in the second groove.

[0013] In one embodiment of the first aspect, each of the battery modules further includes an elastic compression member, the elastic compression member including a compression part and a force transmission part connected together, the compression part being located between the pouch battery and the protective plate, the force transmission part being connected to the elastic electrical connector, the elastic electrical connector being located between the force transmission part and the series electrical connector;

[0014] When the compression part is compressed by the expansion of the pouch battery, the compression part contracts in the first direction and extends in the second direction, thereby driving the force transmission part to move away from the electrode in the first direction, thereby compressing the elastic electrical connector.

[0015] In one embodiment of the first aspect, the compression section is provided with a plurality of grooves spaced apart along the second direction, a portion of the grooves having their openings facing the pouch battery, and another portion of the grooves having their openings facing away from the pouch battery, the pouch battery having a central region, and each groove having a dimension along the second direction equal to the width of each groove, wherein the width of the groove closer to or located in the central region is greater than the width of the groove farther from the central region.

[0016] In one embodiment of the first aspect, the force-transmitting part is provided with an inclined force-transmitting surface, the elastic electrical connector includes a bent part that abuts against the electrode tab, the bent part is provided with an inclined force-receiving surface, and the force-transmitting surface abuts against the force-receiving surface.

[0017] In one embodiment of the first aspect, the battery module further includes a side plate, the side plate being provided with a plurality of first slots and a plurality of second slots, the plurality of first slots being spaced apart along the first direction, each of the second slots being connected to two adjacent first slots, each of the series electrical connectors being located in two adjacent first slots and a second slot connecting two adjacent first slots, in each battery module, the tab is located in the first slot, and the portion of the elastic electrical connector that abuts against the tab is located in the first slot.

[0018] In one embodiment of the first aspect, the battery module further has a third direction, which intersects the first direction and the second direction respectively. The battery module further includes a limiting member, which is provided with a plurality of limiting portions. The plurality of limiting portions are spaced apart along the first direction and located on one side of the tab along the third direction. Each limiting portion is respectively disposed through two adjacent first slots and a second slot connecting the two adjacent first slots. Each limiting portion abuts against one of the series electrical connectors and the elastic electrical connectors of two adjacent battery modules respectively.

[0019] In one embodiment of the first aspect, the side plate is provided with a heat dissipation channel and a plurality of vent holes. The heat dissipation channel extends along the first direction and penetrates the side plate. The plurality of vent holes are spaced apart along the first direction. Each vent hole is connected to the heat dissipation channel and a first slot, respectively.

[0020] Secondly, embodiments of this application provide a battery pack including the battery module described in any of the embodiments of the first aspect above.

[0021] Thirdly, embodiments of this application provide an electrical device including the battery pack described in any of the embodiments of the second aspect above.

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

[0023] The battery module provided in this application includes multiple battery modules and multiple series electrical connectors. The multiple battery modules are arranged along a first direction. Each battery module includes multiple protective plates arranged opposite each other along the first direction and a pouch battery located between two adjacent protective plates. Each protective plate is provided with multiple elastic electrical connectors arranged opposite each other along a second direction. Each tab of the pouch battery is sandwiched between two adjacent elastic electrical connectors along the first direction, thereby making the elastic electrical connector a current-carrying element. At the same time, the polarities of the two adjacent tabs along the first direction are opposite. Each series electrical connector abuts against the elastic electrical connectors of two adjacent battery modules on both sides along the first direction, thereby connecting two adjacent battery modules in series. In this way, multiple pouch batteries can be connected in series without soldering, making it convenient to disassemble and replace any one of the pouch batteries individually without replacing the entire battery module, thus reducing the maintenance difficulty of the battery module.

[0024] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

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

[0027] Figure 2 This paper shows an exploded perspective view of a battery module in one embodiment of the present application.

[0028] Figure 3 This paper shows a schematic diagram of the battery module from one perspective in one embodiment of the present application.

[0029] Figure 4 It shows Figure 3 Schematic diagram of the cross-sectional structure at point AA;

[0030] Figure 5 It shows Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0031] Figure 6 It shows Figure 5 A magnified structural diagram of region C in the diagram;

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

[0033] Figure 8 An exploded perspective view of a battery module in one embodiment of this application is shown;

[0034] Figure 9 It shows Figure 8 A magnified structural diagram of region D in the middle;

[0035] Figure 10 This paper shows another exploded perspective view of the battery module in one embodiment of the present application;

[0036] Figure 11 It shows Figure 10 A magnified structural diagram of region E in the middle;

[0037] Figure 12 This paper shows a schematic diagram of the battery module from one perspective in one embodiment of the present application;

[0038] Figure 13 It shows Figure 12 Schematic diagram of the cross-sectional structure at the middle FF point;

[0039] Figure 14 It shows Figure 13 A magnified structural diagram of the G region;

[0040] Figure 15 A three-dimensional structural schematic diagram of a flexible electrical connector according to one embodiment of this application is shown;

[0041] Figure 16 This illustration shows a three-dimensional structural schematic of a flexible electrical connector according to another embodiment of this application;

[0042] Figure 17 A three-dimensional structural schematic diagram of an elastic compression member in one embodiment of this application is shown;

[0043] Figure 18 A three-dimensional structural schematic diagram of the side plate in one embodiment of this application is shown;

[0044] Figure 19 A three-dimensional structural schematic diagram of the limiting member in one embodiment of this application is shown.

[0045] Explanation of key component symbols:

[0046] 1000 - Battery module; 100 - Battery module; 110 - Protective plate; 111 - Limiting groove; 1111 - First groove; 1112 - Second groove; 130 - Soft-pack battery; 131 - Tab; 132 - Middle area; 140 - Flexible electrical connector; 141 - Connecting part; 1411 - First connector; 1412 - Second connector; 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 component; 171-Compression part; 1711-Groove; 172-Force transmission part; 1721-Force transmission surface; 200-Series electrical connector; 300-Side plate; 310-First slot; 320-Second slot; 330-Heat dissipation channel; 340-Ventilation hole; 400-Limiting component; 410-Limiting part; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0048] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this application, the terms "first," "second," etc., are used to distinguish different objects and should not be construed as indicating or implying a specific order or hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In the description of this application, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0053] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood 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] Currently, in the production process of pouch battery modules, tabs are typically used as current-carrying components and welded to the tabs of two adjacent pouch batteries to connect multiple pouch batteries in series. However, if a pouch battery malfunctions during use, it is not convenient to disassemble and replace that battery individually; sometimes, the entire battery module may need to be replaced, making battery module repair quite difficult.

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

[0056] To solve the above technical problems, such as Figures 1 to 3As shown, in a first aspect, embodiments of this application provide a battery module 1000, which relates to the field of battery technology and is mainly used in battery packs, thereby being used in electrical devices in the form of battery packs.

[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] The battery modules 100 are arranged along a first direction X. Each battery module 100 includes two protective plates 110 arranged opposite each other along the first direction X and a pouch battery 130 located between the two protective plates 110. The pouch battery 130 has two tabs 131 arranged opposite each other along a second direction Y. Each protective plate 110 is provided with two elastic electrical connectors 140 arranged opposite each other along the second direction Y. Each tab 131 is sandwiched between two adjacent elastic electrical connectors 140 along the first direction X, so that each tab 131 is electrically connected to the two adjacent elastic electrical connectors 140 along the first direction X. The polarities of the two adjacent tabs 131 along the first direction X are opposite. Each series electrical connector 200 is disposed between two adjacent battery modules 100. Each series electrical connector 200 abuts 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] For example, the tab 131 can be a positive tab or a negative tab, and there is no specific limitation on the type of tab 131. It should be noted that the above "two adjacent tabs 131 along the first direction X have opposite polarities" can be understood as: among two adjacent tabs 131 along the first direction X, one tab 131 is a positive tab and the other tab 131 is a negative tab.

[0060] It is understood that the battery module 1000 provided in this embodiment includes multiple battery modules 100 and multiple series electrical connectors 200. The multiple battery modules 100 are arranged along a first direction X. Each battery module 100 includes two protective plates 110 arranged opposite each other along the first direction X and a soft-pack battery 130 located between the two protective plates 110. Each protective plate 110 is provided with two elastic electrical connectors 140 arranged opposite each other along a second direction Y. Each tab 131 of the soft-pack battery 130 is sandwiched between two adjacent elastic electrical connectors 140 along the first direction X, thereby using the elastic electrical connectors 140 as current-carrying elements. At the same time, the polarities of the two adjacent tabs 131 along the first direction X are opposite. Each series electrical connector 200 abuts against the elastic electrical connectors 140 of two adjacent battery modules 100 on both sides along the first direction X, thereby connecting two adjacent battery modules 100 in series. This allows multiple pouch cells 130 to be connected in series without soldering, making it easy to disassemble and replace any one of the pouch cells 130 individually without replacing the entire battery module 1000, thus reducing the maintenance difficulty of the battery module 1000.

[0061] Furthermore, the two protective plates 110 serve to protect the pouch battery 130 and facilitate the installation of the flexible electrical connector 140. For example... Figure 7 , Figure 8 and Figure 10 As shown, each battery module 100 may further include a frame 160, which surrounds the pouch battery 130 and is connected between the two protective plates 110, thereby further protecting the pouch battery 130.

[0062] It should be noted that the number of protective plates 110 can be greater than two, with at least two of the protective plates 110 arranged opposite each other along the first direction X, and the pouch battery 130 located between two adjacent protective plates 110. More than two flexible electrical connectors 140 can be provided on the two protective plates 110 adjacent to the pouch battery 130, with at least two of the flexible electrical connectors 140 arranged opposite each other along the second direction Y. In each pouch battery 130, the number of tabs 131 can also be greater than two, with at least two tabs 131 arranged opposite each other along the second direction Y, and the tabs 131 located on the same side of the second direction Y having the same polarity.

[0063] like Figure 3 as well as Figures 5 to 11 As shown, in one embodiment, the flexible electrical connector 140 includes a connecting portion 141 and a bent portion 142 connected to each other. The connecting portion 141 is detachably connected to the guard plate 110. At least a portion of the bent portion 142 is bent toward the tab 131 and abuts against the side of the tab 131 near the bent portion 142.

[0064] For example, the detachable connection can be further defined as a snap-fit, screw connection, interference fit, etc., without specific limitations.

[0065] Understandably, since the flexible electrical connector 140 is detachably connected to the protective plate 110 via the connecting part 141, it is convenient to replace and maintain the flexible electrical connector 140 individually. At the same time, the bending part 142 can generate elastic force to allow the two flexible electrical connectors 140 to stably clamp the tab 131 together, thereby increasing the reliability of the electrical connection between the tab 131 and the flexible electrical connector 140.

[0066] like Figure 15 and Figure 16 As shown, the bending portion 142 further includes a plurality of first bending segments 1421 and at least one second bending segment 1422. The plurality of first bending segments 1421 are spaced apart, and each second bending segment 1422 is connected to two adjacent first bending segments 1421 respectively. Each pair of adjacent first bending segments 1421 and one second bending segment 1422 enclose a heat dissipation gap 143.

[0067] Understandably, because multiple first bending segments 1421 are spaced apart, each second bending segment 1422 is connected to two adjacent first bending segments 1421, thus forming... Figure 15 and Figure 16 The bending shape shown is such that each pair of adjacent first bending segments 1421 and a second bending segment 1422 enclose a heat dissipation gap 143. The heat dissipation gap 143 facilitates the dissipation of 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 Figure 10 As shown, the guard plate 110 is further provided with a limiting groove 111, and the connecting part 141 is snapped into the limiting groove 111.

[0069] Understandably, since the connecting part 141 is snapped into the limiting groove 111, the flexible electrical connector 140 and the protective plate 110 are detachably connected, making it convenient to replace and repair the flexible electrical connector 140 separately.

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

[0071] Understandably, since the first groove 1111 and the second groove 1112 are connected to form a stepped shape, the first connector 1411 is located in the first groove 1111 and the second connector 1412 is located in the second groove 1112. This can restrict the movement of the elastic electrical connector 140 relative to the guard plate 110 in the second direction Y, so that the two elastic electrical connectors 140 can stably clamp the tab 131 to achieve a reliable electrical connection.

[0072] It should be noted that, for the above-mentioned embodiment of the elastic electrical connector 140 including the connecting part 141 and the bending part 142, the elastic electrical connector 140 may also include the connecting part 141 and the elastic part connected together. The connecting part 141 is detachably connected to the guard plate 110, and the elastic part is a spring or a sheet. In this way, the electrode tab 131 can be stably clamped by elastic force for electrical connection. No specific limitation is made on the structure of the elastic electrical connector 140 here.

[0073] like Figures 12 to 14 As shown, in one embodiment, each battery module 100 further includes an elastic compression member 170, which includes a compression section 171 and a force transmission section 172 connected to each other. The compression section 171 is located between the pouch battery 130 and the protective plate 110, and the force transmission section 172 is connected to an elastic electrical connector 140, which is located between the force transmission section 172 and the series electrical connector 200. When the compression section 171 is compressed by the expansion of the pouch battery 130, the compression section 171 contracts in the first direction X and extends in the second direction Y, thereby driving the force transmission section 172 to move away from the tab 131 in the first direction X, thereby compressing the elastic electrical connector 140 and reducing the fit between the elastic electrical connector 140 and the tab 131. This increases the internal resistance between the elastic electrical connector 140 and the pouch battery 130. The internal resistance is positively correlated with the expansion force of the pouch battery 130. That is, as the expansion force increases, the internal resistance also increases. By detecting the change in internal resistance, the expansion status of the pouch battery 130 can be determined, thereby determining whether the pouch battery 130 needs to be disassembled and replaced. This can reduce the risk of thermal runaway of the battery module 1000.

[0074] For example, the connection between the force transmission part 172 and the elastic electrical connector 140 can be abutting, welding, riveting, screw connection, snap-fit, etc., without specific limitations.

[0075] like Figure 13 , Figure 14 and Figure 17 As shown, the compression section 171 is further provided with a plurality of grooves 1711 spaced apart along the second direction Y. The openings of a portion of the grooves 1711 face the soft-pack battery 130, while the openings of another portion of the grooves 1711 face away from the soft-pack battery 130. The soft-pack battery 130 has a middle region 132. The dimension 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 grooves 1711 that are close to or located in the middle region 132 is greater than the width of the grooves 1711 that are far from the middle region 132. This makes the compression section 171 more rigid at both ends along the second direction Y and less rigid in the middle. This is similar to the expansion pattern of the soft-pack battery 130 (the expansion rate of the middle region 132 is large, and the expansion rate of the two end regions is small). This makes the middle position of the compression section 171 easy to deform, thereby making it easier to transmit the force generated by the deformation to the force transmission section 172.

[0076] like Figure 8 , Figure 9 and Figure 14 As shown, the force transmission part 172 is further provided with an inclined force transmission surface 1721, and the elastic electrical connector 140 includes a bent part 142 that abuts against the tab 131. The bent part 142 is provided with an inclined force receiving surface 14221. The force transmission surface 1721 abuts against the force receiving surface 14221, so that the force transmission part 172 and the elastic electrical connector 140 are in stable contact, and the force generated by the deformation of the compression part 171 is easily transmitted to the elastic electrical connector 140, so that the elastic electrical connector 140 is compressed under the action of the force transmission part 172, thereby generating a change in internal resistance.

[0077] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 18 As shown, in one embodiment, the battery module 1000 further includes a side plate 300, on which a plurality of first slots 310 and a plurality of second slots 320 are provided. The plurality of first slots 310 are spaced apart along a first direction X. Each second slot 320 is connected to two adjacent first slots 310. Each series electrical connector 200 is located in two adjacent first slots 310 and in a second slot 320 that connects two adjacent first slots 310. In each battery module 100, the tab 131 is located in the first slot 310, and the portion of the first elastic electrical connector 140 that abuts against the tab 131 is located in the first slot 310.

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

[0079] Meanwhile, the second slot 320 and the second slot 320 together restrict the movement of the series electrical connector 200 relative to the elastic electrical connector 140 along the second direction Y, thereby increasing 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 , Figure 18 and Figure 19 As shown, the battery module 1000 further includes a third direction Z, which intersects with the first direction X and the second direction Y. The battery module 1000 also includes a limiting member 400, on which multiple limiting portions 410 are provided. These multiple limiting portions 410 are spaced apart along the first direction X and located on one side of the electrode tab 131 along the third direction Z. Each limiting portion 410 passes through two adjacent first slots 310 and a second slot 320 connecting the two adjacent first slots 310. The limiting part 410 abuts against one series electrical connector 200 and the elastic electrical connectors 140 of two adjacent battery modules 100 respectively. That is, one limiting part 410 corresponds to two first slots 310 and one second slot 320, thereby abutting against one series electrical connector 200 and four elastic electrical connectors 140. In turn, it works with the side plate 300 to restrict the movement of one series electrical connector 200 and four elastic electrical connectors 140 relative to the side plate 300 in the third direction Z, so as to further increase the reliability of the electrical connection.

[0081] For example, when the battery module 1000 has length, width and 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 Figure 18 As shown, the side plate 300 is further provided with a heat dissipation channel 330 and a plurality of vent holes 340. The heat dissipation channel 330 extends along the first direction X and penetrates the side plate 300. The plurality of vent holes 340 are spaced apart along the first direction X. Each vent hole 340 is connected to the heat dissipation channel 330 and a first slot 310 respectively.

[0083] Understandably, since the heat dissipation channel 330 extends along the first direction X and penetrates the side plate 300, and multiple vent holes 340 are spaced along the first direction X, each vent hole 340 is connected to the heat dissipation channel 330 and a first slot 310 respectively, the battery module 1000 can be connected to the external environment, thereby increasing the efficiency of heat exchange, so as to dissipate the heat generated in the battery module 1000 in a timely manner, and improve the performance and safety of the battery module 1000.

[0084] Secondly, embodiments of this application provide a battery pack including the battery module 1000 in any of the embodiments of the first aspect described above.

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

[0086] Thirdly, embodiments of this application provide an electrical device including the battery pack in any of the embodiments of the second aspect described above.

[0087] It should be noted that electrical devices can include vehicles, ships, spacecraft, mobile phones, portable devices, laptops, electric toys, and power tools. Vehicles can include gasoline-powered cars, natural gas-powered cars, and new energy vehicles, with new energy vehicles including pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools can include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. No specific restrictions are placed on the type of electrical device here.

[0088] It is understood that since the power supply device provided in this embodiment has the battery pack in any of the embodiments of the second aspect described 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 references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery module, characterized in that, The battery module includes a first direction (X) and a second direction (Y) intersecting the first direction (X). Multiple battery modules (100) are arranged along a first direction (X). Each battery module (100) includes multiple protective plates (110) arranged opposite each other along the first direction (X) and a pouch battery (130) located between two adjacent protective plates (110). The pouch battery (130) has multiple tabs (131) arranged opposite each other along a second direction (Y). Each protective plate (110) is provided with multiple flexible electrical connectors (140) arranged opposite each other along the second direction (Y). Each tab (131) is sandwiched between two adjacent flexible electrical connectors (140) along the first direction (X) so that each tab (131) is electrically connected to the two adjacent flexible electrical connectors (140) along the first direction (X). Multiple series electrical connectors (200) are provided, with the polarities of two adjacent tabs (131) along the first direction (X) being opposite. Each series electrical connector (200) is disposed between two adjacent battery modules (100). Each series electrical connector (200) abuts against the elastic electrical connectors (140) of the two adjacent battery modules (100) on both sides along the first direction (X) without welding, so as to connect the two adjacent battery modules (100) in series. The flexible electrical connector (140) includes a connecting portion (141) and a bent portion (142) connected together. The connecting portion (141) is detachably connected to the protective plate (110). At least a portion of the bent portion (142) is bent toward the electrode tab (131) and abuts against the side of the electrode tab (131) near the bent portion (142). A limiting groove (111) is provided on the protective plate (110), and the connecting portion (141) is engaged with the limiting groove (111). The slot (111) includes a first slot (1111) and a second slot (1112). The first slot (1111) and the second slot (1112) are connected along the second direction (Y) to form a stepped shape. The connecting part (141) includes a first connecting body (1411) and a second connecting body (1412) connected to each other. The first connecting body (1411) is located in the first slot (1111), and the second connecting body (1412) is located in the second slot (1112).

2. The battery module according to claim 1, characterized in that, The bending section (142) includes a plurality of first bending segments (1421) and at least one second bending segment (1422). The plurality of first bending segments (1421) are spaced apart, and each second bending segment (1422) is connected to two adjacent first bending segments (1421). Each pair of adjacent first bending segments (1421) and one second bending segment (1422) enclose a heat dissipation gap (143).

3. The battery module according to claim 1, characterized in that, Each of the battery modules (100) further includes an elastic compression member (170), the elastic compression member (170) including a compression part (171) and a force transmission part (172) connected together, the compression part (171) being located between the pouch battery (130) and the protective plate (110), the force transmission part (172) being connected to the elastic electrical connector (140), the elastic electrical connector (140) being located between the force transmission part (172) and the series electrical connector (200); When the compression part (171) is compressed by the expansion of the pouch battery (130), the compression part (171) contracts in the first direction (X) and extends in the second direction (Y) to drive the force transmission part (172) to move away from the tab (131) in the first direction (X) to compress the elastic electrical connector (140).

4. The battery module according to claim 3, characterized in that, The compression section (171) is provided with a plurality of grooves (1711) spaced apart along the second direction (Y). A portion of the grooves (1711) have their openings facing the pouch battery (130), while the openings of another portion of the grooves (1711) are facing away from the pouch battery (130). The pouch battery (130) has a central region (132). The dimension 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) that is close to or located in the central region (132) is greater than the width of the groove (1711) that is far away from the central region (132).

5. The battery module according to claim 3, characterized in that, The force transmission part (172) is provided with an inclined force transmission surface (1721), and the elastic electrical connector (140) includes a bent part (142) that abuts against the electrode (131). The bent part (142) is provided with an inclined force receiving surface (14221), and the force transmission surface (1721) abuts against the force receiving surface (14221).

6. The battery module according to claim 1, characterized in that, The battery module also includes a side plate (300), on which a plurality of first slots (310) and a plurality of second slots (320) are provided. The plurality of first slots (310) are spaced apart along the first direction (X). Each second slot (320) is connected to two adjacent first slots (310). Each series electrical connector (200) is located in two adjacent first slots (310) and in a second slot (320) that connects two adjacent first slots (310). In each battery module (100), the tab (131) is located in the first slot (310), and the portion of the elastic electrical connector (140) that abuts against the tab (131) is located in the first slot (310).

7. The battery module according to claim 6, characterized in that, The battery module also has a third direction (Z), which intersects the first direction (X) and the second direction (Y) respectively. The battery module also includes a limiting member (400), which is provided with a plurality of limiting parts (410). The plurality of limiting parts (410) are spaced apart along the first direction (X) and located on one side of the tab (131) along the third direction (Z). Each limiting part (410) is respectively disposed in two adjacent first slots (310) and a second slot (320) connecting two adjacent first slots (310). Each limiting part (410) abuts against one of the series electrical connectors (200) and the elastic electrical connectors (140) of two adjacent battery modules (100).

8. The battery module according to claim 6, 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) extends along the first direction (X) and penetrates the side plate (300). The plurality of vent holes (340) are spaced apart along the first direction (X). Each vent hole (340) is connected to the heat dissipation channel (330) and a first slot (310).

9. A battery pack, characterized in that, The battery module includes any one of claims 1 to 8.

10. An electrical device, characterized in that, Includes the battery pack as described in claim 9.

Images