Battery modules and electrical devices

Abstract

The present application provides a battery module and an electrical device, which relate to the field of battery technology. According to the battery module provided by the present application, the battery module includes a soft-pack battery. For the heat dissipation of the soft-pack battery, the battery module uses a heat transfer member arranged on the outside of the soft-pack battery to exchange heat with the soft-pack battery, thereby conducting the heat generated by the soft-pack battery to the first heat dissipation member. The first heat dissipation member not only exchanges heat with the heat transfer member to absorb the heat generated by the soft-pack battery conducted by the heat transfer member, but also contacts the pole ear of the soft-pack battery and directly exchanges heat with the pole ear, so that the first heat dissipation member can absorb the heat from the outside of the soft-pack battery and the heat from the pole ear of the soft-pack battery and dissipate it outward, thereby achieving effective heat dissipation of the soft-pack battery.

Description

Technical Field

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

[0002] Existing soft-pack lithium-ion battery modules need to fully consider uniform, rapid and effective heat dissipation. Compared with the heat dissipation solutions of aluminum shell and cylindrical batteries, the existing soft-pack battery modules are generally more complex in design and require a larger number of components. Utility Model Content

[0003] In view of this, the present application provides a battery module and an electrical device, the purpose of which is to solve the above technical problems to a certain extent.

[0004] According to a first aspect of the present application, a battery module is provided, the battery module comprising:

[0005] Soft pack batteries, including tabs;

[0006] A heat transfer member, the heat transfer member is disposed outside the soft-pack battery, and the heat transfer member is configured to exchange heat with the soft-pack battery;

[0007] The first heat dissipation component comprises a first heat dissipation body and a first heat dissipation fin disposed on the first heat dissipation body, the first heat dissipation body is in contact with the tab, and the first heat dissipation body is further configured to exchange heat with the heat transfer component.

[0008] Preferably, the soft-pack battery includes two large surfaces arranged opposite to each other, and a top surface and a bottom surface located on both sides of the two large surfaces, and the tab is located on the top surface;

[0009] Wherein, the heat transfer component is coated on the outer sides of the two large surfaces and the outer side of the bottom surface.

[0010] Preferably, the top surface has a top sealing edge, the heat transfer component includes a heat transfer body covering the outer sides of the two large surfaces and the outer side of the bottom surface, the heat transfer component also includes an extension portion connected to the heat transfer body, the extension portion extends from the junction of one of the large surfaces and the top surface to the top sealing edge, and extends a predetermined distance in a direction away from the top surface; wherein the predetermined distance is 3 mm to 20 mm.

[0011] Preferably, the number of the soft-pack batteries is multiple, and the soft-pack batteries are arranged in multiple columns, and each column of the soft-pack batteries includes multiple stacked soft-pack batteries;

[0012] Wherein, in each column of the soft-pack batteries, the extension portions of the heat transfer members corresponding to the adjacent soft-pack batteries are arranged at intervals in the stacking direction of the soft-pack batteries;

[0013] Wherein, in each column of the soft-pack batteries, adjacent soft-pack batteries are stacked on the same surface so that the polarities of the tabs of the adjacent soft-pack batteries are opposite.

[0014] Preferably, the heat transfer component is attached to the outside of the soft-pack battery, or the battery module further includes a heat conductive layer, the heat conductive layer is located between the outside of the soft-pack battery and the heat transfer component, and the heat conductive layer adheres the outside of the soft-pack battery and the heat transfer component.

[0015] Preferably, the battery module further comprises a second heat dissipation component, wherein the second heat dissipation component comprises a second heat dissipation body and a second heat dissipation fin disposed on the second heat dissipation body;

[0016] The soft-pack battery includes a top surface and a bottom surface arranged opposite to each other, the tab is located on the top surface, and the second heat dissipation body is configured to exchange heat with the bottom surface.

[0017] Preferably, the battery module further comprises a limiting member, the limiting member comprises a first plate portion and a second plate portion connected to each other, the first plate portion and the second plate portion are arranged at an angle to each other;

[0018] The first plate portion abuts against a side of the second heat dissipation component that is opposite to the bottom surface, the first plate portion is detachably connected to the second heat dissipation component, and the second plate portion is located outside the soft-pack battery.

[0019] Preferably, the battery module further comprises an air cooling mechanism, the air cooling mechanism faces at least one of the top surface and the bottom surface, and the first heat dissipating fins and the second heat dissipating fins are both provided with through holes for airflow to enter.

[0020] Preferably, the heat transfer member, the first heat dissipation member and the second heat dissipation member are formed of a metal sheet having a thickness less than or equal to 400 μm.

[0021] Preferably, the first heat dissipation body has a receiving portion, and the first heat dissipation body also has an opening portion connecting the receiving portion with the environment outside the receiving portion;

[0022] Part of the soft-pack battery is disposed in the accommodating portion, so that the first heat dissipation body is sleeved on the outside of the soft-pack battery.

[0023] Preferably, the battery module further comprises a lead-out plate, the lead-out plate is arranged on the outer side of the first heat dissipation member, the lead-out plate has a lead-out hole arranged corresponding to the pole ear, the pole ear is passed through the lead-out hole to be exposed to the side of the lead-out plate facing away from the soft-pack battery;

[0024] Part of the lead-out plate is located in the opening to define the position of the opening, and the lead-out plate is detachably connected to the first heat dissipation component.

[0025] Preferably, the soft-pack battery includes two large surfaces arranged opposite to each other, and a top surface and a bottom surface located on both sides of the two large surfaces, and the tab is located on the top surface;

[0026] The battery module also includes a first cover member and a second cover member, the first cover member and the second cover member respectively face the two large surfaces, and the first cover member and the second cover member are aligned with each other to seal the soft-pack battery in a space defined by the first cover member, the second cover member and the lead-out plate.

[0027] According to a second aspect of an embodiment of the present application, there is provided an electric device, the electric device comprising the battery module as described above.

[0028] According to the battery module provided by the present application, the battery module includes a soft-pack battery. For the heat dissipation of the soft-pack battery, the battery module uses a heat transfer member disposed on the outside of the soft-pack battery to exchange heat with the soft-pack battery, thereby transferring the heat generated by the soft-pack battery to the first heat dissipation member. The first heat dissipation member not only exchanges heat with the heat transfer member to absorb the heat generated by the soft-pack battery transferred by the heat transfer member, but also contacts with the tab of the soft-pack battery to directly exchange heat with the tab, so that the first heat dissipation member can absorb the heat from the outside of the soft-pack battery and the heat from the tab of the soft-pack battery and dissipate it outward, thereby achieving effective heat dissipation of the soft-pack battery.

[0029] According to the battery module provided by the present application, compared with the heat dissipation method of the module for soft-pack batteries in the prior art, the present application specifically considers the two heat-generating locations, the outside of the soft-pack battery and the ear inside the soft-pack battery, and then concentrates the heat to be dissipated through the first heat dissipation component, which effectively simplifies the complexity of the heat dissipation structure and helps to reduce the number of components used.

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1A schematic diagram showing an exploded view of a battery module provided according to an embodiment of the present application;

[0033] Figure 2 A schematic diagram showing a limiting member and a second heat dissipation member of a battery module provided according to an embodiment of the present application is shown;

[0034] Figure 3 A schematic diagram of a heat transfer component of a battery module provided according to an embodiment of the present application is shown;

[0035] Figure 4 A schematic diagram of a lead-out plate and a first heat dissipation component of a battery module provided according to an embodiment of the present application is shown.

[0036] Reference numerals:

[0037] 100-soft pack battery; 110-large surface; 120-top surface; 130-bottom surface;

[0038] 200-heat transfer member; 210-heat transfer body; 220-extension portion;

[0039] 300 - first heat dissipation component; 310 - first heat dissipation body; 311 - accommodation portion; 312 - opening portion; 320 - first heat dissipation fin; 330 - rectangular boss;

[0040] 400 - second heat dissipation component; 410 - second heat dissipation body; 420 - second heat dissipation fins; 430 - cylindrical boss;

[0041] 500-limiting member; 510-first plate portion; 520-second plate portion;

[0042] 600-lead-out board;

[0043] 700 - first cover member; 800 - second cover member. DETAILED DESCRIPTION

[0044] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0045] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0048] According to a first aspect of an embodiment of the present application, a battery module is provided. Figures 1 to 4 The structure and working principle of the battery module are described in detail.

[0049] According to the battery module provided in the embodiment of the present application, the battery module includes a soft-pack battery 100, a heat transfer member 200 and a first heat dissipation member 300. Among them, the soft-pack battery 100 includes a tab, the heat transfer member 200 is arranged on the outside of the soft-pack battery 100, and the heat transfer member 200 is configured to exchange heat with the soft-pack battery 100. In the embodiment, the first heat dissipation member 300 includes a first heat dissipation body 310 and a first heat dissipation fin 320 arranged on the first heat dissipation body 310, the first heat dissipation body 310 is in contact with the tab, and the first heat dissipation body 310 is also configured to exchange heat with the heat transfer member 200.

[0050] Thus, according to the battery module provided in the embodiment of the present application, the battery module includes a soft-pack battery 100. For the heat dissipation of the soft-pack battery 100, the battery module uses the heat transfer member 200 disposed on the outside of the soft-pack battery 100 to exchange heat with the soft-pack battery 100, thereby conducting the heat generated by the soft-pack battery 100 to the first heat dissipation member 300. The first heat dissipation member 300 not only exchanges heat with the heat transfer member 200 to absorb the heat generated by the soft-pack battery 100 conducted by the heat transfer member 200, but also contacts with the tab of the soft-pack battery 100 to directly exchange heat with the tab, so that the first heat dissipation member 300 can absorb the heat from the outside of the soft-pack battery 100 and the heat from the tab of the soft-pack battery 100 and dissipate it to the outside, thereby achieving effective heat dissipation of the soft-pack battery 100.

[0051] According to the battery module provided in the embodiment of the present application, compared with the heat dissipation method of the module for the soft-pack battery 100 in the prior art, the present application specifically considers the two heat-generating locations, the outside of the soft-pack battery 100 and the tab inside the soft-pack battery 100, and then concentrates the heat to be dissipated through the first heat dissipation component 300, which effectively simplifies the complexity of the heat dissipation structure and helps to reduce the number of components used.

[0052] In an embodiment, the soft-pack battery 100 may be, for example, a lithium-ion battery, that is, a lithium-ion battery with high operating voltage, high specific energy, long cycle life, and low self-discharge, and is widely used in power, energy storage, 3C digital and other fields.

[0053] In an embodiment, the heat transfer member 200 and the first heat dissipation member 300 may both be made of metal materials, such as gold, silver or copper, which are metals with good heat transfer capabilities.

[0054] In an embodiment, the first heat dissipation fin 320 may be formed by a plurality of metal sheets arranged at intervals from each other. For example, a group of metal sheets are arranged on the first heat dissipation body 310 in sequence and at intervals, and the first heat dissipation fin 320 may include a plurality of such groups of metal sheets, thereby effectively increasing the contact area with the environment and increasing the heat dissipation capacity.

[0055] In the embodiment, the heat transfer member 200 can achieve heat exchange with the outside of the soft-pack battery 100 by directly contacting the outside of the soft-pack battery 100, or can achieve heat exchange with the outside of the soft-pack battery 100 by indirectly contacting the outside of the soft-pack battery 100 through a heat-conducting structure disposed in the middle. Corresponding to the two heat exchange methods, the connection method between the heat transfer member 200 and the outside of the soft-pack battery 100 can also be different. For example, direct contact heat exchange can be that the heat transfer member 200 is adsorbed on the outside of the soft-pack battery 100 by electrostatics, while for indirect contact heat exchange with the heat-conducting structure disposed in the middle, the soft-pack battery 100 and the heat transfer member 200 can be connected through the heat-conducting structure, which will be explained in the subsequent description.

[0056] According to the battery module provided in the embodiment of the present application, the soft-pack battery 100 may include two large surfaces 110 arranged opposite to each other, and a top surface 120 and a bottom surface 130 located on both sides of the two large surfaces 110, and the tabs may be located on the top surface 120. In the embodiment, the heat transfer member 200 is coated on the outside of the two large surfaces 110 and the outside of the bottom surface 130.

[0057] The large surface 110 mentioned here refers to the two surfaces with the largest area of ​​the soft-pack battery 100. The heat transfer member 200 is coated on the outside of these two surfaces, and can be further coated on the outside of the bottom surface 130 of the soft-pack battery 100, so that the heat generated by the soft-pack battery 100 can be relatively comprehensively transferred to the first heat dissipation member 300. In addition, according to the battery module provided in the embodiment of the present application, the heat transfer member 200 is formed as a substantially U-shaped structure, and the side of the opening of the U-shaped structure and the side where the top surface 120 of the soft-pack battery 100 is located can effectively conduct heat by using this U-shaped structure, and can also improve the efficiency of the heat transfer member 200 wrapping the soft-pack battery 100, because the soft-pack battery 100 only needs to be placed into the U-shaped structure from the opening of the U-shaped structure.

[0058] According to the battery module provided in the embodiment of the present application, the top surface 120 of the soft-pack battery 100 has a top sealing edge, the heat transfer component 200 may include a heat transfer body 210 coated on the outer sides of the two large surfaces 110 and the outer side of the bottom surface 130, and the heat transfer component 200 may also include an extension portion 220 connected to the heat transfer body 210, and the extension portion 220 may extend from the junction of a large surface 110 and the top surface 120 to the top sealing edge, and extend a predetermined distance in a direction away from the top surface 120.

[0059] In this example, the heat transfer body 210 is formed into a substantially U-shaped structure. On this basis, an L-shaped extension portion 220 is further extended from an end edge of the heat transfer body 210. A portion of the L-shaped extension portion 220 extends along the top surface 120, and the other portion can be perpendicular to the front portion, that is, it extends in the horizontal direction in a suspended manner. The L-shaped extension portion 220 is beneficial for preventing the soft-pack battery 100 from escaping from the heat transfer body 210, and can also enable the extension portion 220 to extend along the top sealing edge to increase the fitting area.

[0060] In an embodiment, the predetermined distance may be 3 mm to 20 mm, for example, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm or 19 mm.

[0061] According to the battery module provided in the embodiment of the present application, there are multiple soft-pack batteries 100, and these soft-pack batteries 100 can be arranged in multiple columns, and each column of soft-pack batteries 100 can include multiple stacked soft-pack batteries 100. In the embodiment, in each column of soft-pack batteries 100, the extensions 220 of the heat transfer members 200 corresponding to the adjacent soft-pack batteries 100 are arranged at intervals in the stacking direction of the soft-pack batteries 100. In the embodiment, in each column of soft-pack batteries 100, adjacent soft-pack batteries 100 are stacked on the same surface so that the polarities of the tabs of adjacent soft-pack batteries 100 are opposite.

[0062] In the embodiment, the number of soft-pack batteries 100 can be, for example, 8, divided into two columns, that is, 4 layers of batteries are stacked in each column. As described above, the single-column battery stacking is stacking the batteries in pairs on the same side, ensuring that the extensions 220 (i.e., the actual folding edges) on both sides of the soft-pack battery 100 are in opposite directions, and the polarities of the tabs of the two soft-pack batteries 100 are opposite.

[0063] According to the battery module provided in the embodiment of the present application, as described above, the heat transfer component 200 can be attached to the outside of the soft-pack battery 100 (for example, by electrostatic adsorption), or the battery module can also include a heat conductive layer, which can be located between the outside of the soft-pack battery 100 and the heat transfer component 200, and the heat conductive layer can bond the outside of the soft-pack battery 100 to the heat transfer component 200.

[0064] For the latter embodiment, the heat-conducting layer can be composed of a double-layer adhesive on the heat-conducting member 200 facing the soft-pack battery 100 and a high-thermal-conducting composite material, wherein the high-thermal-conducting composite material can be formed into a soft sheet structure, and its thickness range can be less than or equal to 400 μm, for example, 150 μm. Thus, the heat-conducting layer ensures a high contact area and heat-conducting capacity under the premise of bonding.

[0065] According to the battery module provided in the embodiment of the present application, the battery module may further include a second heat dissipation member 400, and the second heat dissipation member 400 may include a second heat dissipation body 410 and a second heat dissipation fin 420 disposed on the second heat dissipation body 410 (the structure of the second heat dissipation fin 420 here may refer to the structural description of the first heat dissipation fin 320 as described above). In the embodiment, the second heat dissipation body 410 may be configured to exchange heat with the bottom surface 130.

[0066] Specifically, the second heat dissipation body 410 can be directly attached to the outer side of the portion of the heat transfer member 200 corresponding to the bottom surface 130 , thereby directly exchanging heat with the bottom surface 130 of the soft-pack battery 100 , and then dissipating heat through the second heat dissipation fins 420 .

[0067] In an embodiment, the second heat dissipation body 410 may be, for example, a rectangular plate-like structure, and a plurality of sheet-like structures may be spaced apart along the vertical direction on the side of the second heat dissipation body 410 facing away from the soft-pack battery 100, that is, on the outside of the second heat dissipation body 410, thereby forming a second heat dissipation fin 420.

[0068] According to the battery module provided in the embodiment of the present application, the battery module may further include a limiting member 500, the limiting member 500 includes a first plate portion 510 and a second plate portion 520 connected to each other, and the first plate portion 510 and the second plate portion 520 may be arranged at an angle to each other. In the embodiment, the first plate portion 510 may abut against the side of the second heat dissipation member 400 that is opposite to the bottom surface 130, the first plate portion 510 may be detachably connected to the second heat dissipation member 400, and the second plate portion 520 may be located on the outside of the soft-pack battery 100.

[0069] In an embodiment, one of the two plate portions of the limiting member 500 is detachably connected to the second heat dissipation member 400, and the other is located on the outside of the soft-pack battery 100, which is equivalent to using the limiting member 500 with a bent shape to achieve rapid installation and positioning of the second heat dissipation member 400 in a relatively simple form.

[0070] In the embodiment, as an example, the second plate portion 520 may extend along the large surface 110 located at the lower side of the soft pack battery 100, that is, the limiting member 500 may be L-shaped, and the first plate portion 510 and the second plate portion 520 of the limiting member 500 may be perpendicular to each other. In the embodiment, the second plate portion 520 may be attached to the outer side of the heat transfer member 200.

[0071] In an embodiment, the limiting member 500 and the second heat dissipation member 400 can be detachably connected by plugging. For example, a through hole is provided on the limiting member 500, and a corresponding boss is provided on the second heat dissipation fin 420 of the second heat dissipation member 400, and the detachable connection is achieved by inserting the boss into the through hole.

[0072] In an embodiment, the boss may be, for example, welded to the second heat dissipation fin 420 . In terms of size, the boss may have a diameter of φ1-5 mm and a length of 0.1-3 mm, that is, be a cylindrical boss 430 .

[0073] According to the battery module provided in the embodiment of the present application, the battery module may further include an air cooling mechanism, which may face at least one of the top surface 120 and the bottom surface 130 , and the first heat dissipating fins 320 and the second heat dissipating fins 420 are both provided with through holes for airflow to enter.

[0074] In an embodiment, the air cooling mechanism may be, for example, disposed in a housing of a battery module to be mentioned later. In an embodiment, the air cooling mechanism may, for example, include a fan, and the fan may, for example, be directed toward the top surface 120 of the soft-pack battery 100. In this regard, the through holes on the first heat dissipation fins 320 may be air inlet holes, and the through holes on the second heat dissipation fins 420 may be air outlet holes, so that air cooling and heat dissipation can be formed.

[0075] According to the battery module provided in the embodiment of the present application, the heat transfer member 200, the first heat dissipation member 300 and the second heat dissipation member 400 are formed by metal sheets with a thickness less than or equal to 400 μm. Therefore, the battery module provided in the embodiment of the present application replaces the rigid contact shell of the existing soft-pack lithium-ion battery for heat dissipation with a soft foil metal sheet with a thickness of less than 400 μm. Since the soft foil metal sheet with a thickness of less than 400 μm makes the heat dissipation conduction structure of the soft-pack lithium-ion battery more direct and convenient to manufacture, the conduction heat dissipation cost is lower and the space utilization rate is higher under the premise of ensuring the heat dissipation effect of the soft-pack lithium-ion battery.

[0076] According to the battery module provided in the embodiment of the present application, the first heat dissipation body 310 may have a receiving portion 311, and the first heat dissipation body 310 may also have an opening 312 connecting the receiving portion 311 with the environment outside the receiving portion 311. In the embodiment, part of the soft-pack battery 100 may be disposed in the receiving portion 311, so that the first heat dissipation body 310 is sleeved on the outside of the soft-pack battery 100.

[0077] Thus, according to the battery module provided in the embodiment of the present application, the first heat dissipation body 310 may be, for example, U-shaped, so that the portion surrounded by the U-shape is the aforementioned accommodating portion 311, and the U-shaped opening is the aforementioned opening portion 312. In the embodiment, this structure of the first heat dissipation body 310 can be utilized to insert the first heat dissipation body 310 from the top sealing side of the paired soft-pack batteries 100, and the first heat dissipation body 310 is brought into contact with the tabs of the soft-pack batteries 100 that mainly generate heat and the aforementioned heat transfer member 200. When the first heat dissipation body 310 is inserted into place, the bottom of the U-shape is abutted against the body of the soft-pack battery 100 and is limited in position.

[0078] In an embodiment, the U-shaped first heat dissipation body 310 has two longer strip portions opposite to each other, and the above-mentioned first heat dissipation fins 320 can be arranged on these two strip portions. For example, a group of metal sheets is arranged on each strip portion, and in each group of metal sheets, the extension direction of each metal sheet can be the same as the extension direction of the strip portion.

[0079] According to the battery module provided in the embodiment of the present application, the battery module may further include an extraction plate 600, which may be disposed on the outside of the first heat dissipation member 300, and may have extraction holes corresponding to the tabs, and the tabs may be inserted through the extraction holes to be exposed on the side of the extraction plate 600 facing away from the soft-pack battery 100. In the embodiment, the extraction plate 600 is used to extract the positive and negative tabs of the soft-pack battery 100 and shield the first heat dissipation member 300.

[0080] In an embodiment, part of the lead-out plate 600 is located within the opening portion 312, that is, it can be inserted into the opening to limit the position of the opening portion 312, that is, to limit the opposite side of the U-shaped bottom of the U-shaped first heat dissipation body 310. As an example, the lead-out plate 600 can be detachably connected to the first heat dissipation component 300.

[0081] In the embodiment, as an example, the first heat dissipation component 300 and the lead-out plate 600 can also be plugged together. Specifically, a rectangular boss 330 can be welded on the first heat dissipation body 310, and a draft angle (for example, 1-8°) can be set for the rectangular boss 330, and a rectangular groove is set on the side of the lead-out plate 600 facing the first heat dissipation component 300. Through this plug-in cooperation, a detachable connection between the first heat dissipation component 300 and the lead-out plate 600 is achieved.

[0082] According to the battery module provided in the embodiment of the present application, the battery module may further include a first cover member 700 and a second cover member 800, the first cover member 700 and the second cover member 800 respectively facing the two large surfaces 110, and the first cover member 700 and the second cover member 800 are aligned with each other to accommodate the soft-pack battery 100 in the space defined by the first cover member 700 and the second cover member 800.

[0083] In an embodiment, the housing of the battery module may be jointly served by the first cover member 700 and the second cover member 800. Specifically, the first cover member 700 may be U-shaped, and the second cover member 800, on the basis of the U-shaped structure, further has a plate portion for facing the bottom surface 130 of the soft-pack battery 100, so that the first cover member 700 and the second cover member 800 may be matched in the vertical direction by being clamped to each other or by fasteners connecting the joints, thereby forming a housing having an opening on the side where the lead-out plate 600 is located, and the opening is closed by the lead-out plate 600. This housing realizes the protection and sealing of the battery, and is easier to assemble than the five-sided bag-type housing in the prior art.

[0084] According to a second aspect of an embodiment of the present application, there is provided an electric device, the electric device comprising the above battery module, the electric device further comprising an electric mechanism, and the electric mechanism is powered by the above battery module.

[0085] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. All equivalent structural changes made using the contents of the present application specification and drawings under the innovative concept of the present application, or direct / indirect application in other related technical fields are included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: The battery module comprises: Soft pack batteries, including tabs; A heat transfer member, the heat transfer member is disposed outside the soft-pack battery, and the heat transfer member is configured to exchange heat with the soft-pack battery; The first heat dissipation component comprises a first heat dissipation body and a first heat dissipation fin disposed on the first heat dissipation body, the first heat dissipation body is in contact with the tab, and the first heat dissipation body is further configured to exchange heat with the heat transfer component.

2. The battery module according to claim 1, characterized in that: The soft-pack battery comprises two large surfaces arranged opposite to each other, and a top surface and a bottom surface located on both sides of the two large surfaces, and the tab is located on the top surface; Wherein, the heat transfer component is coated on the outer sides of the two large surfaces and the outer side of the bottom surface.

3. The battery module according to claim 2, characterized in that: The top surface has a top sealing edge, the heat transfer component includes a heat transfer body covered on the outer sides of the two large surfaces and the outer side of the bottom surface, the heat transfer component also includes an extension portion connected to the heat transfer body, the extension portion extends from the junction of one of the large surfaces and the top surface to the top sealing edge, and extends a predetermined distance in a direction away from the top surface; wherein the predetermined distance is 3 mm to 20 mm.

4. The battery module according to claim 3, characterized in that: The number of the soft-pack batteries is multiple, and the soft-pack batteries are arranged in multiple columns, and each column of the soft-pack batteries includes multiple stacked soft-pack batteries; Wherein, in each column of the soft-pack batteries, the extension portions of the heat transfer members corresponding to the adjacent soft-pack batteries are arranged at intervals in the stacking direction of the soft-pack batteries; Wherein, in each column of the soft-pack batteries, adjacent soft-pack batteries are stacked on the same surface so that the polarities of the tabs of the adjacent soft-pack batteries are opposite.

5. The battery module according to claim 1, characterized in that: The heat transfer member is attached to the outside of the soft-pack battery, or the battery module further includes a heat conductive layer, the heat conductive layer is located between the outside of the soft-pack battery and the heat transfer member, and the heat conductive layer adheres the outside of the soft-pack battery and the heat transfer member.

6. The battery module according to claim 1, characterized in that: The battery module further includes a second heat dissipation component, wherein the second heat dissipation component includes a second heat dissipation body and a second heat dissipation fin disposed on the second heat dissipation body; The soft-pack battery includes a top surface and a bottom surface arranged opposite to each other, the tab is located on the top surface, and the second heat dissipation body is configured to exchange heat with the bottom surface.

7. The battery module according to claim 6, characterized in that: The battery module further includes a limiting member, the limiting member including a first plate portion and a second plate portion connected to each other, the first plate portion and the second plate portion being arranged at an angle to each other; The first plate portion abuts against a side of the second heat dissipation component that is opposite to the bottom surface, the first plate portion is detachably connected to the second heat dissipation component, and the second plate portion is located outside the soft-pack battery.

8. The battery module according to claim 6, characterized in that: The battery module further includes an air cooling mechanism, which faces at least one of the top surface and the bottom surface. The first heat dissipation fins and the second heat dissipation fins are both provided with through holes for airflow to enter.

9. The battery module according to claim 6, characterized in that: The heat transfer member, the first heat dissipation member, and the second heat dissipation member are formed of a metal sheet having a thickness less than or equal to 400 μm.

10. The battery module according to claim 1, characterized in that: The first heat dissipation body has a housing portion, and the first heat dissipation body also has an opening portion connecting the housing portion with the environment outside the housing portion; Part of the soft-pack battery is disposed in the accommodating portion, so that the first heat dissipation body is sleeved on the outside of the soft-pack battery.

11. The battery module according to claim 10, characterized in that: The battery module further includes a lead-out plate, which is disposed on the outer side of the first heat dissipation member, and has a lead-out hole disposed corresponding to the pole ear, and the pole ear is passed through the lead-out hole to be exposed to a side of the lead-out plate that is opposite to the soft-pack battery; Part of the lead-out plate is located in the opening to define the position of the opening, and the lead-out plate is detachably connected to the first heat dissipation component.

12. The battery module according to claim 11, characterized in that: The soft-pack battery comprises two large surfaces arranged opposite to each other, and a top surface and a bottom surface located on both sides of the two large surfaces, and the tab is located on the top surface; The battery module also includes a first cover member and a second cover member, the first cover member and the second cover member respectively face the two large surfaces, and the first cover member and the second cover member are aligned with each other to seal the soft-pack battery in a space defined by the first cover member, the second cover member and the lead-out plate.

13. An electrical device, characterized in that: The electrical device comprises the battery module according to any one of claims 1 to 12.

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