Battery module, battery pack, and electric device

Abstract

The present disclosure provides a battery module, a battery pack and a power utilization device, which comprises a battery pack, an end plate and a heat dissipation plate; the battery pack comprises a plurality of single batteries arranged along a first direction; the end plate is arranged at the end of the battery pack in the first direction; the end plate comprises a plate body, the edge of the plate body is bent and extended towards the battery pack to form a bent edge, the end plate is connected to the battery pack through the bent edge and is limitedly matched with the battery pack; the heat dissipation plate is arranged on the side of the battery pack in a second direction perpendicular to the first direction. Through the above structural design, the end plate of the present disclosure is connected to the battery pack through the bent edge and is limited, the grouping positioning function of the battery pack in the arrangement direction of the single battery is realized, compared with the traditional scheme of fixing the battery by adopting the frame structure, the number of parts is significantly reduced, the structural complexity is simplified, the material cost and the weight are reduced, which is beneficial to the lightweight design of the battery module, so that the battery module can realize higher energy density.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and more particularly to a battery module, a battery pack, and an electrical device. Background Technology

[0002] In the existing design of battery modules, in order to achieve the grouping of multiple individual cells along the arrangement direction, a frame structure is usually used to position the multiple individual cells of the battery module. This results in a large number of parts, complex structure, high material cost and heavy weight of the battery module, which is not conducive to the lightweight design of the battery module and makes it difficult to meet the higher requirements for energy density. Summary of the Invention

[0003] A primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide a battery module.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solution: According to one aspect of this disclosure, a battery module is provided, comprising a battery pack, an end plate, and a heat sink; the battery pack includes a plurality of individual cells arranged along a first direction; the end plate is disposed at an end of the battery pack in the first direction; the end plate includes a plate body, the edge of which is bent and extended toward the battery pack to form a flange, the end plate being connected to the battery pack via the flange and engaging with the battery pack in a limiting manner; the heat sink is disposed on a side of the battery pack in a second direction, the second direction being perpendicular to the first direction.

[0005] According to one embodiment of this disclosure, the folded edge includes a bottom folded edge, which is formed by bending and extending from the bottom edge of the plate body and extending to the bottom surface of the battery pack; the relative bending angle between the bottom folded edge and the plate body is 90°.

[0006] According to one embodiment of this disclosure, the folded edge includes a side folded edge, which is formed by bending and extending from the side edge of the plate and extending to the side of the battery pack in the second direction; the relative bending angle between the side folded edge and the plate is greater than or equal to 60° and less than 90°.

[0007] According to one embodiment of this disclosure, the battery module further includes a buffer pad disposed between the end plate and the end face of the battery pack.

[0008] According to one embodiment of this disclosure, a thermally conductive adhesive is provided between the heat sink and the side of the battery pack, and the heat sink is connected to the battery pack via the thermally conductive adhesive.

[0009] According to one embodiment of this disclosure, the battery module further includes a strapping band wrapped around the outside of the end plate and the side plate.

[0010] According to one embodiment of this disclosure, the electrode structure of the single cell extends from the top surface, and the electrode structures of two adjacent single cells are bent and connected together to make the two electrode structures electrically connected.

[0011] According to one embodiment of this disclosure, the battery module further includes an insulating buffer block disposed between two electrode structures that belong to two adjacent individual cells and are connected together.

[0012] According to one embodiment of the present disclosure, the battery module further includes an insulating film, the insulating film including a body and a flange formed by bending and extending the side edge of the body, the body being disposed on the bottom surface of the battery module and the flange being disposed on the side surface of the battery module.

[0013] Another primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide a battery pack.

[0014] To achieve the above objectives, the present disclosure adopts the following technical solution: According to another aspect of this disclosure, a battery pack is provided, comprising a battery module, a cover, and an outer membrane as proposed in this disclosure and described in the above embodiments; the cover is disposed on top of the battery module; and the outer membrane is sleeved over the battery module and part of the cover.

[0015] According to one embodiment of the present disclosure, the battery pack further includes a handle, a portion of which is disposed around the battery pack and connected to the surface of the cover and the battery module, and another portion of which is spaced apart from the cover to form a gripping portion for the user to lift.

[0016] According to one embodiment of this disclosure, the cover is provided with a positioning groove, the handle portion is accommodated in the positioning groove, and is connected to the cover in the positioning groove.

[0017] According to one embodiment of this disclosure, the battery pack is connected to a power harness and a data acquisition harness; the cover is also provided with a data acquisition interface and a power output port; the power harness extends through the power output port, and the connector at the end of the data acquisition harness is exposed within the range of the data acquisition interface.

[0018] According to one embodiment of this disclosure, the acquisition interface is provided with a sealing element, which is detachably connected to the cover.

[0019] Another primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above and to provide an electrical device.

[0020] To achieve the above objectives, the present disclosure adopts the following technical solution: According to another aspect of this disclosure, an electrical device is provided that includes a battery pack as proposed in this disclosure and described in the above embodiments.

[0021] As can be seen from the above technical solutions, the advantages and positive effects of the battery module, battery pack, and power-consuming device proposed in this disclosure are as follows: The battery module disclosed herein includes a battery pack, an end plate, and a heat sink. The battery pack includes multiple individual cells arranged along a first direction. The end plate is disposed at the end of the battery pack in the first direction. The end plate includes a plate body, the edge of which is bent and extended toward the battery pack to form a flange. The end plate is connected to the battery pack via the flange and engages with the battery pack for positioning. The heat sink is disposed on the side of the battery pack in a second direction, which is perpendicular to the first direction. Through the above structural design, this disclosure utilizes the flange of the end plate to connect and position the battery pack, thereby achieving the function of grouping and positioning the battery pack in the arrangement direction of the individual cells. Compared with the traditional solution of fixing the battery with a frame structure, this disclosure significantly reduces the number of components, simplifies the structural complexity, reduces material costs and weight, and is conducive to the lightweight design of the battery module, enabling the battery module to achieve higher energy density. Attached Figure Description

[0022] The various objectives, features, and advantages of this disclosure will become more apparent from the following detailed description of preferred embodiments of the disclosure taken in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein: Figure 1 This is a perspective view of a battery module according to an exemplary embodiment; Figure 2 yes Figure 1 A partial exploded view of the battery module is shown; Figure 3 yes Figure 1 A partial side view of the battery module is shown. Figure 4 yes Figure 1 A partial top view of the battery module is shown; Figure 5 yes Figure 1 Another partially exploded view of the battery module is shown; Figure 6 yes Figure 1 A partially enlarged view of the battery module is shown; Figure 7 yes Figure 1 The diagram shows the connection diagram of the power harness and the data acquisition harness of the battery module; Figure 8 This is an exploded view of a battery pack according to an exemplary embodiment; Figure 9 yes Figure 8 An exploded view of the sealing components of the battery pack is shown. Figure 10 yes Figure 8 A perspective view of the battery pack cover is shown.

[0023] The annotations in the attached figures are explained as follows: Detailed Implementation

[0024] Typical embodiments embodying the features and advantages of this disclosure will be described in detail in the following description. It should be understood that this disclosure can have various variations in different embodiments without departing from the scope of this disclosure, and the descriptions and drawings therein are illustrative in nature and not intended to limit this disclosure.

[0025] In the following description of various exemplary embodiments of this disclosure, reference is made to the accompanying drawings, which form part of this disclosure, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this disclosure. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this disclosure. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this disclosure, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this disclosure.

[0026] See Figure 1 The illustration shows a perspective view of the battery module 100 proposed in this disclosure. In this exemplary embodiment, the battery module 100 proposed in this disclosure is described as an example of a pouch battery module 100 used in unmanned aerial vehicles. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other application scenarios or battery modules 100 of different cell types; these changes are still within the scope of the principles of the battery module 100 proposed in this disclosure.

[0027] like Figure 1As shown, in one embodiment of this disclosure, the battery module 100 includes a battery pack 110, an end plate 120, and a heat sink 130. (See also...) Figures 2 to 7 , Figure 2 China representatively shows Figure 2 A partial exploded view of the battery module 100 is shown in the figure. Figure 3 A partial side view of the battery module 100 is shown in the figure. Figure 4 A partial top view of the battery module 100 is shown in the image. Figure 5 Another partial exploded view of the battery module 100 is shown in the figure. Figure 6 A partial enlarged view of the battery module 100 is shown in the image. Figure 7 The diagram shows a representative connection of the power harness 171 and the data acquisition harness 172. The structure, connection method, and functional relationship of the main components of the battery module 100 proposed in this disclosure will be described in detail below with reference to the above-mentioned figures.

[0028] like Figures 1 to 5 As shown, in one embodiment of this disclosure, the battery pack 110 includes a plurality of individual battery cells 111 arranged along a first direction. The individual battery cells 111 can be pouch cells as shown, or other types of batteries, such as prismatic cells. An end plate 120 is disposed at the end of the battery pack 110 in the first direction, which is the arrangement direction of the plurality of individual battery cells 111, and is parallel to the bottom or side surface of the battery pack 110. The first direction can be referred to as direction D1 shown in the figures. The end plate 120 includes a plate body 121, the edge of which is bent and extended toward the battery pack 110 to form a folded edge. The end plate 120 is connected to the battery pack 110 via this folded edge, and the folded edge allows the end plate 120 to be positioned and engaged with the battery pack 110. The heat sink 130 is disposed on the side of the battery pack 110 in a second direction, which is perpendicular to the first direction and parallel to the bottom or end face of the battery pack 110 (i.e., the arrangement surface of the individual cells 111, also known as the "large surface"). The second direction can be referred to as direction D2 shown in the attached figure. Through the above structural design, this disclosure utilizes the folded edge provided by the end plate 120 to connect and limit the battery pack 110, realizing the group positioning function of the battery pack 110 in the arrangement direction of the individual cells 111. Compared with the traditional solution of fixing the battery with a frame structure, this disclosure significantly reduces the number of parts, simplifies the structural complexity, reduces material costs and weight, which is conducive to the lightweight design of the battery module 100, enabling the battery module 100 to achieve higher energy density.

[0029] like Figure 3As shown, in one embodiment of this disclosure, the folded edge may include a bottom folded edge 122, which is formed by bending and extending the bottom edge of the plate 121, and extends to the bottom surface of the battery pack 110. The relative bending angle α between the bottom folded edge 122 and the plate 121 can be 90°. Through the above structural design, this disclosure utilizes the bottom folded edge 122 to support and limit the bottom surface of the battery pack 110, and the 90° relative bending angle α ensures the uniform arrangement of the bottom folded edge 122 and the bottom surface of the battery pack 110, improving the support effect.

[0030] like Figure 4 As shown, in one embodiment of this disclosure, the folded edge may include a side folded edge 123, which is formed by bending and extending the side edge of the plate 121, and the side folded edge 123 extends to the side surface of the battery pack 110 in the second direction. The relative bending angle β between the side folded edge 123 and the plate 121 can be greater than or equal to 60° and less than 90°, for example, 60°, 65°, 70°, 75°, 85°, etc., and preferably 80°. Through the above structural design, this disclosure utilizes the side folded edge 123 to limit the side surface of the battery pack 110.

[0031] like Figure 2 As shown, in one embodiment of this disclosure, the battery module 100 may further include a buffer pad 124, which is disposed between the end plate 120 and the end face of the battery pack 110. Through the above structural design, this disclosure utilizes the buffer pad 124 to reserve an expansion gap for the cyclic expansion of individual battery cells 111, fully utilizing the expansion and contraction characteristics of the battery during charging and discharging to reserve expansion space, thereby improving the energy density of the battery module 100 and extending the cycle life of the battery. Furthermore, adjacent individual battery cells 111 and end-positioned individual battery cells 111 can be bonded to the buffer pad 124 using double-sided adhesive or structural adhesive.

[0032] As described above, in one embodiment of this disclosure, the end plate 120 may be provided with a bottom folded edge 122 and a side folded edge 123, specifically with relative bending angles of 90° and 80° respectively. Accordingly, the aforementioned folded edges are adapted to the sealing structures on both sides of the battery pack 110, suitable for forming an embedded battery style. Furthermore, the end plate 120 and the buffer pad 124 are bonded together with double-sided adhesive or structural adhesive. This frame assembly method avoids relative sliding between the battery pack 110 and the end plate 120. This structure solves the problems of low strength due to the use of thin plates in the structural components at both ends of the battery pack 110, the inability to accommodate battery expansion after expansion, resulting in structural component deformation, or the heavy weight caused by using thicker profiles in the structural components at both ends of the battery pack 110. The folded edges on the end plate 120 not only effectively increase strength but also reduce material weight and form a certain limiting relationship with the battery.

[0033] like Figure 5 As shown, in one embodiment of this disclosure, thermally conductive adhesive 131 may be provided between the heat sink 130 and the side of the battery pack 110, and the heat sink 130 is connected to the battery pack 110 via the thermally conductive adhesive 131. Through the above structural design, this disclosure uses the thermally conductive adhesive 131 to bond the heat sink 130 to the side of the battery module 100. The heat sink 130 can cover all individual battery cells 111, dissipating the heat generated by the individual battery cells 111 through the heat sink 130, while also helping to even out the temperature differences between the individual battery cells 111. Accordingly, the above structural design differs from the traditional battery module 100 where each single or two batteries use a C-shaped heat sink 130 sandwiched between the batteries, and the heat sinks 130 are independent of each other. Compared with the above traditional heat dissipation method, this disclosure can significantly reduce the number of heat sinks 130, increase the energy density of the battery module 100, and connect all individual batteries 111 to the heat sinks 130 through thermally conductive adhesive 131 to form a heat conduction channel, which is concentrated in the same heat conduction medium and equalizes the temperature difference between each individual battery 111.

[0034] like Figure 1 As shown, in one embodiment of this disclosure, the battery module 100 may further include a strapping strap 140, which is wrapped around the end plate 120 and the outer side plate. The strapping strap 140 may be, for example, a high-strength fiber tape. Through the above structural design, this disclosure utilizes the strapping strap 140 to wrap and fix the end plate 120 and the side plate to the outer periphery of the battery pack 110. For example, after the battery pack 110 is compressed into a group by a certain force, it can be wrapped and secured using the strapping strap 140. Through the application of the specially structured end plate 120 and the high-strength strapping strap 140, a certain pre-tightening force is achieved throughout the battery's lifespan, improving the battery's cycle performance. This solves the problem of poor electrode adhesion and rapid lifespan degradation caused by the lack of pre-tightening force throughout the battery's lifespan.

[0035] like Figure 6As shown, in one embodiment of this disclosure, the electrode structure 1111 of a single cell 111 can be led out from the top surface of the single cell 111. The electrode structures 1111 of two adjacent single cells 111 are bent and connected together to make the two electrode structures 1111 electrically connected. For example, the electrode structure 1111 of each single cell 111 is a positive electrode and a negative electrode. Both the positive electrode and the negative electrode are led out from the top surface of the single cell 111, and they can be arranged, for example, along a second direction. Based on this, the positive electrode of one single cell 111 is connected to the negative electrode of another single cell 111 adjacent on one side by bending, and the negative electrode of the same single cell 111 is connected to the positive electrode of another single cell 111 adjacent on the other side by bending, thereby realizing the overall series connection of all single cells 111 of the battery pack 110. Among them, the connection process of the two electrode structures 1111 bent and connected together can be implemented by laser welding or other methods, and relevant tooling can be used in conjunction with the welding process.

[0036] like Figure 6 As shown, based on the structural design of the electrode structures 1111 of two adjacent single cells 111 being bent and connected together, in one embodiment of this disclosure, the battery module 100 may further include an insulating buffer block 150, which is disposed between the two electrode structures 1111 belonging to two adjacent single cells 111 and connected together. The insulating buffer block 150 may be made of highly resilient foam material. Through the above structural design, this disclosure utilizes the insulating buffer block 150 to achieve insulating protection and isolation between adjacent single cells 111 and structural buffer isolation to resist mechanical impact. By adopting the above design, this disclosure differs from the traditional design of achieving power connection through conductive busbar welding of battery tabs, and also differs from the design of using plastic parts to divide adjacent battery tabs into independent spaces. In comparison, this disclosure can further reduce the number of components, increase the energy density of the battery module 100, and reduce component costs.

[0037] like Figure 7As shown, in one embodiment of this disclosure, the battery module 100 further includes a power harness 171 and a data acquisition harness 172. The power harness 171 and the data acquisition harness 172 are directly or indirectly connected to the tab structure of the individual battery cell 111, specifically, for example, connecting adjacent bent portions of the tab structure. The power harness 171 is used to provide power output to the battery pack 110, and the data acquisition harness 172 can be used for signal acquisition from the battery pack 110, such as current, voltage, and temperature signals. Specifically, the end of the data acquisition harness 172 can be laser-welded to the tab structure using a press-fit thin-film nickel terminal, and the other end of the data acquisition harness 172 can be connected to an external voltage output connector. Accordingly, this disclosure solves the problem of solder joint failure under harsh vibration and shock conditions when the voltage acquisition structure is soldered to the battery tab using tin soldering.

[0038] See also Figure 8 , Figure 8 A representative exploded perspective view of the battery pack proposed in this disclosure is shown, in which the battery module 100 is shown not in the exploded perspective view. Figure 1 As shown in the partial structure, in one embodiment of this disclosure, the battery module 100 may further include an insulating film 160. The insulating film 160 includes a body 161 and a flange 162 formed by bending and extending the side edge of the body 161, i.e., the insulating film 160 is generally U-shaped. The body 161 of the insulating film 160 is disposed on the bottom surface of the battery pack 110, and the flange 162 is disposed on the side surface of the battery pack 110. Through the above structural design, this disclosure utilizes the insulating film 160 to further improve the insulation performance of the bottom of the battery pack 110.

[0039] It should be noted that the battery modules shown in the accompanying drawings and described in this specification are merely a few examples among many battery modules capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the battery modules shown in the accompanying drawings or described in this specification.

[0040] Based on the above detailed description of several exemplary embodiments of the battery module proposed in this disclosure, several exemplary embodiments of the battery pack proposed in this disclosure will be described below.

[0041] See Figure 8The diagram illustrates an exploded view of the battery pack proposed in this disclosure. In this exemplary embodiment, the battery pack is described using an application in a drone as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below to apply the relevant designs of this disclosure to other types of application scenarios, and these changes will still remain within the scope of the principles of the battery pack proposed in this disclosure.

[0042] See also Figure 9 and Figure 10 , Figure 9 An exploded view of the sealing component 221 of the battery pack is shown in the figure. Figure 10 The figure shows a perspective view of the battery pack cover 200. The structure, connection method, and functional relationship of the main components of the battery pack disclosed herein will be described in detail below with reference to the above figures.

[0043] For example Figures 8 to 10 As shown, in one embodiment of this disclosure, the battery pack includes the battery module 100 described in detail in the above embodiments, and further includes a cover 200 and an outer membrane 300. The cover 200 is disposed on the top of the battery module 100. The outer membrane 300 is sleeved on the outside of the battery module 100 and part of the cover 200.

[0044] like Figure 8 and Figure 9 As shown, in one embodiment of this disclosure, the battery pack may further include a handle 400. A portion of the handle 400 is arranged around the battery pack, meaning this portion of the handle 400 is connected to the surfaces of the cover 200 and the battery module 100, and an outer membrane 300 covers the handle 400. Another portion of the handle 400 is spaced apart from the cover 200 to form a gripping portion for the user to pull. Through the above structural design, this disclosure utilizes the handle 400 for user lifting, making it more portable.

[0045] For example Figure 9 and Figure 10 As shown, based on the structural design of the battery pack including the handle 400, in one embodiment of this disclosure, the cover 200 may be provided with a positioning groove 210, the handle 400 is partially accommodated in the positioning groove 210, and is connected to the cover 200 in the positioning groove 210.

[0046] like Figure 9As shown, in one embodiment of this disclosure, the cover 200 may be provided with a data acquisition interface 220 and a power output port 230. The power harness 171 connected to the battery pack 110 can extend through the power output port 230, and the connector at the end of the data acquisition harness 172 connected to the battery pack 110 can be exposed within the range of the data acquisition interface 220. Specifically, it can be a rigid connection connector of the PCB circuit board exposed in the data acquisition interface 220.

[0047] Furthermore, such as Figure 9 As shown, based on the structural design of the cover 200 with the collection interface 220, in one embodiment of this disclosure, the collection interface 220 may be provided with a sealing member 221. The material of the sealing member 221 is, for example, silicone or other specific materials. The sealing member 221 is detachably connected to the cover 200, which facilitates the safety protection of the connector (such as the rigid connection connector mentioned above) and improves the mechanical safety performance of the battery module 100.

[0048] In addition, in one embodiment of this disclosure, a label pasting area 240 may be provided on the cover 200 for pasting labels.

[0049] As described above, this disclosure enables the cover 200 to be functionally partitioned through the aforementioned special designs, facilitating the assembly of various components and reducing assembly difficulty.

[0050] It should be noted that the battery packs shown in the accompanying drawings and described in this specification are merely a few examples among many battery packs capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the battery packs shown in the accompanying drawings or described in this specification.

[0051] Based on the above detailed description of several exemplary embodiments of the battery pack proposed in this disclosure, an exemplary embodiment of the power-consuming device proposed in this disclosure will be described below.

[0052] In one embodiment of this disclosure, the electrical device proposed in this disclosure includes the battery pack proposed in this disclosure and described in detail in the above embodiments.

[0053] It should be noted that the electrical appliances shown in the accompanying drawings and described in this specification are merely a few examples among many electrical appliances capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the electrical appliances shown in the accompanying drawings or described in this specification.

[0054] In summary, the battery module 100 disclosed herein includes a battery pack 110, an end plate 120, and a heat sink 130. The battery pack 110 includes a plurality of individual battery cells 111 arranged along a first direction. The end plate 120 is disposed at the end of the battery pack 110 in the first direction. The end plate 120 includes a plate body 121, the edge of which is bent and extended toward the battery pack 110 to form a flange. The end plate 120 is connected to the battery pack 110 via the flange and is engaged with the battery pack 110 in a limiting fit. The heat sink 130 is disposed on the side of the battery pack 110 in a second direction, which is perpendicular to the first direction. Through the above structural design, this disclosure utilizes the folded edge provided on the end plate 120 to connect and limit the battery pack 110, thereby realizing the group positioning function of the battery pack 110 in the arrangement direction of the individual cells 111. Compared with the traditional solution of fixing the battery with a frame structure, this disclosure significantly reduces the number of parts, simplifies the structural complexity, reduces material costs and weight, which is conducive to the lightweight design of the battery module 100, enabling the battery module 100 to achieve higher energy density.

[0055] The foregoing has described and / or illustrated exemplary embodiments of the battery modules, battery packs, and power devices proposed in this disclosure. However, the embodiments of this disclosure are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms “a,” “an,” and “the above” are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to those listed. Furthermore, the terms “first” and “second,” etc., in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the subject matter.

[0056] Although the battery modules, battery packs and power devices proposed in this disclosure have been described with respect to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of this disclosure within the spirit and scope of the claims.

Claims

1. A battery module (100), characterized in that, include: The battery pack (110) includes a plurality of individual cells (111) arranged along a first direction; An end plate (120) is disposed at the end of the battery pack (110) in the first direction; the end plate (120) includes a plate body (121), the edge of the plate body (121) is bent and extended toward the battery pack (110) to form a folded edge, and the end plate (120) is connected to the battery pack (110) via the folded edge and is in a limiting cooperation with the battery pack (110); A heat sink (130) is disposed on the side of the battery pack (110) in a second direction, which is perpendicular to the first direction.

2. The battery module (100) according to claim 1, characterized in that, The folded edge includes a bottom folded edge (122), which is formed by bending and extending the bottom edge of the plate (121) to the bottom surface of the battery pack (110); the relative bending angle (α) between the bottom folded edge (122) and the plate (121) is 90°.

3. The battery module (100) according to claim 1, characterized in that, The folded edge includes a side fold (123), which is formed by bending and extending the side edge of the plate (121) and extending to the side of the battery pack (110) in the second direction; the relative bending angle (β) between the side fold (123) and the plate (121) is greater than or equal to 60° and less than 90°.

4. The battery module (100) according to claim 1, characterized in that, The battery module (100) also includes a buffer pad (124), which is disposed between the end plate (120) and the end face of the battery pack (110).

5. The battery module (100) according to claim 1, characterized in that, Thermally conductive adhesive (131) is provided between the heat sink (130) and the side of the battery pack (110), and the heat sink (130) is connected to the battery pack (110) via the thermally conductive adhesive (131).

6. The battery module (100) according to claim 1, characterized in that, The battery module (100) also includes a strapping strap (140) which is wrapped around the end plate (120) and the outside of the side plate.

7. The battery module (100) according to claim 1, characterized in that, The electrode structure (1111) of the single cell (111) is led out from the top surface. The electrode structures (1111) of two adjacent single cells (111) are bent and connected together so that the two electrode structures (1111) are electrically connected.

8. The battery module (100) according to claim 1, characterized in that, The battery module (100) also includes an insulating buffer block (150), which is disposed between two electrode structures (1111) that belong to two adjacent individual cells (111) and are connected together.

9. The battery module (100) according to claim 1, characterized in that, The battery module (100) further includes an insulating film (160), which includes a body (161) and a flange (162) formed by bending and extending the side edge of the body (161). The body (161) is disposed on the bottom surface of the battery pack (110), and the flange (162) is disposed on the side surface of the battery pack (110).

10. A battery pack, characterized in that, include: The battery module (100) according to any one of claims 1 to 9; A cover (200) is disposed on the top of the battery module (100); An outer membrane (300) is fitted over the battery module (100) and part of the cover (200).

11. The battery pack according to claim 10, characterized in that, The battery pack also includes a handle (400), a portion of which is arranged around the battery pack and connected to the surface of the cover (200) and the battery module (100), and another portion of which is spaced apart from the cover (200) to form a grip for the user to lift.

12. The battery pack according to claim 11, characterized in that, The cover (200) is provided with a positioning groove (210), and the handle (400) is partially accommodated in the positioning groove (210) and connected to the cover (200) in the positioning groove (210).

13. The battery pack according to claim 11, characterized in that, The battery pack (110) is connected to a power harness (171) and a data acquisition harness (172); the cover (200) is also provided with a data acquisition interface (220) and a power output port (230); the power harness (171) extends through the power output port (230), and the connector at the end of the data acquisition harness (172) is exposed within the range of the data acquisition interface (220).

14. The battery pack according to claim 13, characterized in that, The acquisition interface (220) is provided with a sealing element (221), which is detachably connected to the cover (200).

15. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 10 to 14.

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