Battery module, battery pack and electric equipment

Abstract

The invention discloses a battery module, a battery pack and electric equipment, the battery module comprises a battery cell group and a shell, the battery cell group is provided with a plurality of battery cells stacked along a first direction; the shell is provided with a containing cavity used for containing the battery cell group and comprises two side plates, the two side plates are arranged on the two sides of the battery cell group in the second direction respectively, the second direction intersects with the first direction, and at least one of the two side plates is provided with a heat exchange flow channel so that the side plates can form a heat exchange piece; and each battery cell exchanges heat with the heat exchange piece. Therefore, the heat exchange runners are arranged in the side plates, so that the side plates are constructed into heat exchange pieces, the side plates can directly exchange heat with the battery cell group, the heat resistance can be reduced, the heat exchange efficiency can be improved, the heat conduction path can be shortened, the temperature control capability of the battery module can be enhanced, and the overall performance of the battery module can be improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery module, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, the battery pack casing typically includes a tray and a liquid cooling plate. The liquid cooling plate is independently positioned at the bottom of the tray, and the battery cells are supported on the tray. The liquid cooling plate is located at the bottom of the tray and is used for heat exchange with the battery cells. However, due to structural limitations, heat must pass through the module base plate and tray from inside the battery cells to be carried away, resulting in high thermal resistance, low efficiency, excessively long heat conduction path, and poor temperature control capability, leaving room for improvement. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a battery module in which the side plate can directly exchange heat with the battery cell assembly, which helps to reduce thermal resistance, improve heat exchange efficiency, shorten the heat conduction path, and enhance the temperature control capability of the battery module.

[0004] According to an embodiment of the present invention, a battery module includes: a cell assembly having a plurality of cells stacked along a first direction; and a housing having a receiving cavity for accommodating the cell assembly, the housing including two side plates, the two side plates being respectively disposed on both sides of the cell assembly along a second direction, the second direction intersecting the first direction, at least one of the two side plates having a heat exchange channel such that the side plate is configured as a heat exchange element, and each cell exchanges heat with the heat exchange element.

[0005] According to the battery module of the present invention, by providing heat exchange channels in the side plate so that the side plate is constructed as a heat exchange component, the side plate can directly exchange heat with the battery cell assembly, which helps to reduce thermal resistance, improve heat exchange efficiency, shorten the heat conduction path, enhance the temperature control capability of the battery module, and improve the overall performance of the battery module.

[0006] According to some embodiments of the present invention, a thermally conductive adhesive layer is sandwiched between the heat exchanger and the battery cell assembly.

[0007] According to some embodiments of the battery module of the present invention, the thickness of the thermally conductive adhesive layer ranges from 1 mm to 1.5 mm.

[0008] According to some embodiments of the battery module of the present invention, at least a portion of the heat exchange channel extends along the first direction.

[0009] According to some embodiments of the battery module of the present invention, the housing further includes a water nozzle, which is disposed on one side of the side plate along the first direction. The water nozzle has an inlet and an outlet, and the heat exchange channel is connected to the inlet and the outlet respectively.

[0010] According to some embodiments of the battery module of the present invention, the heat exchange channel includes an inlet channel and an outlet channel. The inlet channel extends along a first direction, and the outlet channel extends along the first direction. The inlet channel and the outlet channel are arranged along a third direction, which intersects the first direction and the second direction respectively. The inlet channel is connected to the inlet port, and the outlet channel is connected to the outlet port.

[0011] According to some embodiments of the battery module of the present invention, the housing further includes a connecting pipe, the connecting pipe including a first connecting pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe being respectively disposed at both ends of the side plate along the first direction, the first connecting pipe being used to connect the inlet flow channel and the outlet flow channel to the water nozzle respectively, and the second connecting pipe being used to connect the inlet flow channel and the outlet flow channel.

[0012] According to some embodiments of the present invention, the heat exchange component is an integrally extruded part; or, the heat exchange component includes a heat spreader and a harmonica tube, the heat spreader exchanges heat with each of the battery cells, the harmonica tube is disposed on the side of the heat spreader away from the battery cell assembly, and the heat exchange channel is defined inside the harmonica tube.

[0013] According to some embodiments of the battery module of the present invention, the minimum wall thickness of the heat exchanger is not less than 5 mm.

[0014] According to some embodiments of the present invention, the battery module housing includes two end plates, which are respectively disposed on both sides of the cell assembly along the first direction and fixedly connected to the side plate. The end plates are adapted to limit the cell assembly.

[0015] According to some embodiments of the battery module of the present invention, the flatness of the side of the end plate for contacting and engaging with the battery cell assembly is less than or equal to 0.2 mm; and / or, the minimum thickness of the end plate is not less than 10 mm.

[0016] According to some embodiments of the present invention, at least one of the end plates is provided with an end plate flow channel, the end plate flow channel heat exchanges with at least the battery cell located at the end in the first direction, and the end plate flow channel is in communication with the heat exchange flow channel; or, the end plate flow channel and the heat exchange flow channel are independently provided.

[0017] The present invention also proposes a battery pack.

[0018] A battery pack according to an embodiment of the present invention includes: a housing and a battery module according to any of the above embodiments, wherein the housing is provided with a mounting cavity and the battery module is mounted in the mounting cavity.

[0019] According to the battery pack of the present invention, the battery module has strong temperature control capability and good overall performance, thus improving the practicality of the battery pack.

[0020] According to an embodiment of the present invention, the battery pack comprises multiple battery modules, and the housing is provided with inlet and outlet water ports, which are respectively connected to the heat exchange channels of the multiple battery modules via connecting pipes.

[0021] The present invention also proposes an electrical device.

[0022] An electrical device according to an embodiment of the present invention includes: a battery pack according to any of the above embodiments.

[0023] According to the embodiments of the present invention, the battery module of the electrical equipment has strong temperature control capability and good overall performance, which improves the practicality of the battery pack and enhances the product competitiveness of the electrical equipment.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of a battery pack according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a battery module according to an embodiment of the present invention; Figure 3 yes Figure 2 A schematic diagram showing the fit between the side plate and the battery cell assembly; Figure 4 yes Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of a battery module according to another embodiment of the present invention; Figure 6 yes Figure 5 A schematic diagram showing the fit between the side plate and the battery cell assembly; Figure 7 yes Figure 6 A magnified view of a section at point B in the middle; Figure 8 This is a schematic diagram of the assembly of the end plate and the battery cell according to an embodiment of the present invention.

[0026] Figure label: Battery pack 1000; Battery module 100; First direction F1; Second direction F2; Third direction F3; Cell pack 1; Cell 11; 2. Shell; 21. Side plate; 22. End plate flow channel 221; 23. Protective cover; 24. Water nozzle; 241. Inlet; 242. Outlet; 25. Connecting pipe; 251. First connecting pipe; 252. Heat exchanger 3; heat spreader 31; harmonica tube 32; heat exchange channel 33; inlet channel 331; sub-inlet channel 3311; outlet channel 332; sub-outlet channel 3321; heat dissipation fins 34; thermally conductive adhesive layer 4; connecting copper busbar 5; 200 housing; 201 mounting cavity; 202 inlet and outlet. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these 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 the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Hereinafter, with reference to the accompanying drawings, a battery module 100 according to an embodiment of the present invention will be described.

[0030] like Figures 1-8As shown, the battery module 100 according to an embodiment of the present invention includes: a cell assembly 1 and a housing 2. The cell assembly 1 has a plurality of cells 11 stacked along a first direction F1. The housing 2 has a receiving cavity for accommodating the cell assembly 1. The housing 2 includes two side plates 21, which are respectively disposed on both sides of the cell assembly 1 along a second direction F2. The second direction F2 intersects the first direction F1. At least one of the two side plates 21 is provided with a heat exchange channel 33 so that the side plate 21 is configured as a heat exchange element 3, and each cell 11 exchanges heat with the heat exchange element 3.

[0031] For example, refer to Figures 1-4 As shown, the battery module 100 includes a cell assembly 1 and a housing 2. The cell assembly 1 has a plurality of cells 11 stacked along a first direction F1. The cells 11 can be solid cells. The housing 2 has a receiving cavity for receiving the cell assembly 1, and the housing 2 is adapted to apply a restraining force to the cells 11 from both sides along the first direction F1.

[0032] The housing 2 includes two side plates 21, which are respectively disposed on both sides of the battery cell assembly 1 along the second direction F2 and are fitted together with the battery cell assembly 1. The side plates 21 can apply a certain restraining force to the battery cell assembly 1, and at least one of the two side plates 21 is provided with a heat exchange channel 33 so that the side plate 21 is configured as a heat exchange element 3. Coolant, such as water, ethylene glycol aqueous solution, mineral oil, etc., flows in the heat exchange channel 33. Each battery cell 11 exchanges heat with the heat exchange element 3 so that the heat exchange element 3 can be used to regulate the temperature of each battery cell 11. It should be noted that the second direction F2 intersects with the first direction F1. For example, the first direction F1 can be set as Figure 2 The left and right directions are shown, and the second direction F2 is set as... Figure 2 The up and down directions are shown.

[0033] For example, the second direction F2 is the up-down direction. The upper side plate 21 can be provided with a heat exchange channel 33 to be constructed as a heat exchange element 3; or, the lower side plate 21 can be provided with a heat exchange channel 33 to be constructed as a heat exchange element 3; or, both side plates 21 can be provided with heat exchange channels 33 to be constructed as heat exchange elements 3. The present invention does not limit this.

[0034] It is understandable that the side plate 21 can directly exchange heat with the cell assembly 1, which helps to reduce thermal resistance, improve heat exchange efficiency, shorten the heat conduction path, and enhance the temperature control capability of the battery module 100, such as precisely controlling the temperature of the cell 11 within the optimal operating window of 40℃-70℃.

[0035] Furthermore, by eliminating the need for a separate liquid cooling plate assembly, space can be saved, and the volumetric energy density and gravimetric energy density of the battery pack 1000 can be improved. The battery modules 100 form independent units, so when the battery pack 1000 fails, there is no need for large-scale disassembly and assembly of the battery pack 1000. Only the corresponding battery module 100 needs to be replaced to complete the repair, which greatly reduces the maintenance cost and time throughout the entire life cycle. Several battery modules 100 can be combined to assemble battery packs 1000 of different specifications, which greatly simplifies the design of the battery pack 1000 and is highly compatible with advanced technology concepts such as CTP / CTC.

[0036] According to the battery module 100 of the present invention, by providing a heat exchange channel 33 in the side plate 21 so that the side plate 21 is constructed as a heat exchange component 3, the side plate 21 can directly exchange heat with the cell assembly 1, which helps to reduce thermal resistance, improve heat exchange efficiency, shorten the heat conduction path, enhance the temperature control capability of the battery module 100, and improve the overall performance of the battery module 100.

[0037] In some embodiments of the present invention, such as Figure 4 As shown, a thermally conductive adhesive layer 4 can be sandwiched between the heat exchanger 3 and the battery cell assembly 1. This arrangement improves the connection stability between the heat exchanger 3 and the battery cell assembly 1, reduces contact thermal resistance, and increases the heat exchange efficiency between them.

[0038] In some embodiments of the present invention, the thickness of the thermally conductive adhesive layer 4 can be set to a range of 1mm-1.5mm, such as 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc. This setting ensures the adhesive performance of the thermally conductive adhesive layer 4 and avoids excessive thickness that could affect its thermal conductivity, thus improving the design rationality of the battery module 100.

[0039] In some embodiments of the present invention, such as Figure 4 As shown, heat dissipation fins 34 can be provided inside the heat exchange channel 33. This can enhance the passive heat dissipation performance of the heat exchanger 3.

[0040] In some embodiments of the present invention, heat dissipation fins 34 may be provided on the outer surface of the heat exchanger 3. This can enhance the passive heat dissipation performance of the heat exchanger 3.

[0041] In some embodiments of the present invention, such as Figure 2 As shown, at least a portion of the heat exchange channel 33 can be provided to extend along the first direction F1 so that the heat exchange channel 33 can cover each cell 11 of the cell assembly 1. This allows the heat exchange channel 33 to exchange heat with the cell 11 more effectively, improving the overall temperature uniformity of the cell assembly 1.

[0042] In some embodiments of the present invention, such as Figure 2 As shown, the housing 2 also includes a water nozzle 24, which is located on one side of the side plate 21 along the first direction F1. The water nozzle 24 has an inlet 241 and an outlet 242. The heat exchange channel 33 is connected to the inlet 241 and the outlet 242 respectively. The water nozzle 24 is used to connect with the external flow path. In this way, the coolant in the external flow path can flow into the heat exchange channel 33 through the inlet 241. The coolant can exchange heat with the battery cell assembly 1 in the heat exchange channel 33. After the heat exchange is completed, the coolant can flow out to the external flow path through the outlet 242.

[0043] The above settings can reduce the difficulty of connecting the heat exchange channel 33, thereby reducing the overall assembly difficulty of the battery module 100 and improving the practicality of the battery module 100.

[0044] In some embodiments of the present invention, the heat exchange channel 33 includes an inlet channel 331 and an outlet channel 332. The inlet channel 331 extends along a first direction F1, and the outlet channel 332 extends along the first direction F1. The inlet channel 331 and the outlet channel 332 are arranged along a third direction F3. The third direction F3 intersects with the first direction F1 and the second direction F2, respectively. The inlet channel 331 is connected to the inlet port 241, and the outlet channel 332 is connected to the outlet port 242.

[0045] For example, refer to Figure 3 As shown, the heat exchange channel 33 includes an inlet channel 331 and an outlet channel 332. The inlet channel 331 extends along a first direction F1, and the outlet channel 332 extends along the first direction F1. The inlet channel 331 and the outlet channel 332 are arranged along a third direction F3. It should be noted that the third direction F3 intersects with the first direction F1 and the second direction F2 respectively. For example, the first direction F1 can be set as... Figure 2 As shown in the left and right directions, set the second direction F2 as... Figure 2 The vertical direction is shown, and the third direction F3 is set as... Figure 2 The front and back directions are shown.

[0046] Specifically, one end of the inlet channel 331 along the first direction F1 can be connected to the inlet port 241, one end of the outlet channel 332 can be connected to the outlet port 242, and the other end of the inlet channel 331 along the first direction F1 can be connected to the other end of the inlet port 241 along the first direction F1. The inlet channel 331 and the outlet channel 332 can be directly connected or indirectly connected.

[0047] Specifically, the coolant in the external flow path can flow into the inlet flow channel 331 through the inlet 241, and the coolant can flow along the inlet flow channel 331 to flow into the outlet flow channel 332 to exchange heat with the battery cell 11. After heat exchange, the coolant can flow out to the external flow path through the outlet 242.

[0048] The above settings can simplify the heat exchange channel 33, reduce the processing difficulty of the heat exchange component 3, and make it easier for the heat exchange channel 33 to connect with the water nozzle 24, thereby reducing the assembly difficulty and improving the design rationality of the battery module 100.

[0049] In some embodiments of the present invention, such as Figures 2-3 As shown, the housing 2 also includes a connecting pipe 25, which includes a first connecting pipe 251 and a second connecting pipe 252. The first connecting pipe 251 and the second connecting pipe 252 are respectively disposed at both ends of the side plate 21 along the first direction F1. The first connecting pipe 251 is used to connect one end of the inlet channel 331 along the first direction F1 and one end of the outlet channel 332 along the first direction F1 to the water nozzle 24, that is, to connect the inlet channel 331 to the inlet port 241 and the outlet channel 332 to the outlet port 242. The second connecting pipe 252 is used to connect the other end of the inlet channel 331 along the first direction F1 and the other end of the outlet channel 332 along the first direction F1. This reduces the molding difficulty of the housing 2 and improves the practicality of the battery module 100.

[0050] In some embodiments of the present invention, such as Figure 3 As shown, the inlet flow channel 331 includes multiple sub-inlet flow channels 3311, which are arranged along the third direction F3. This allows the inlet flow channel 331 to exchange heat with the cell 11 more evenly, improving the temperature uniformity of the battery module 100.

[0051] In some embodiments of the present invention, such as Figure 3 As shown, the outflow channel 332 includes multiple sub-outflow channels 3321, which are arranged along the third direction F3. This allows the outflow channel 332 to exchange heat with the cell 11 more evenly, improving the temperature uniformity of the battery module 100.

[0052] In some embodiments of the present invention, such as Figure 4 As shown, the heat exchanger 3 can be configured as an integrally extruded part. This reduces the molding difficulty of the heat exchanger 3, improves the sealing performance of the heat exchange channel 33, and enhances the reliability of the battery module 100.

[0053] In some embodiments of the present invention, such as Figures 6-7As shown, the heat exchanger 3 includes a heat spreader 31 and a harmonica tube 32. The heat spreader 31 exchanges heat with each battery cell 11. The harmonica tube 32 is located on the side of the heat spreader 31 away from the battery cell assembly 1 and is welded to the heat spreader 31, such as by brazing. A heat exchange channel 33 is defined within the harmonica tube 32. Specifically, multiple harmonica tubes 32 can be provided, and the multiple harmonica tubes 32 are evenly spaced along a third direction F3. Each harmonica tube 32 defines a portion of the heat exchange channel 33.

[0054] The above settings enable a composite cooling structure and prevent the battery cell 11 from squeezing the heat exchange channel 33, thereby improving the design rationality of the battery module 100.

[0055] In some embodiments of the present invention, the minimum wall thickness of the heat exchanger 3 can be set to be not less than 5 mm, such as 5 mm, 6 mm, 7 mm, etc. It should be noted that when the heat exchanger 3 is an integrally extruded part, the wall thickness of the heat exchanger 3 is the minimum wall thickness; while when the heat exchanger 3 includes a heat spreader 31 and a harmonica tube 32, the wall thickness of the heat spreader 31 is the minimum wall thickness of the heat exchanger 3.

[0056] The above settings ensure the structural strength of the heat exchanger 3, allowing it to fit more stably against the battery cell assembly 1, thus improving the heat exchange effect of the heat exchanger 3 and enhancing the practicality of the battery module 100.

[0057] In some embodiments of the present invention, such as Figure 2 As shown, the housing 2 may include two end plates 22, which are respectively disposed on both sides of the battery cell assembly 1 along the first direction F1 and fixedly connected to the side plate 21. The end plates 22 are adapted to limit the battery cell assembly 1 to apply a restraining force to the battery cell assembly 1. It should be noted that the material of the side plate 21 of the end plate 22 is metal such as steel or aluminum; the end plate 22 and the side plate 21 can be formed separately and then welded together.

[0058] With the above settings, the housing 2 can apply sufficient restraining force to the cell assembly 1, which can reach several megapascals to tens of megapascals, thereby ensuring that the cell assembly 1 can work under a suitable pressure environment and improving the overall performance of the battery module 100.

[0059] In some embodiments of the present invention, the flatness of the side of the end plate 22 that contacts and mates with the cell assembly 1 can be set to be less than or equal to 0.2 mm, such as 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm, or 0.2 mm. This ensures that the contact surface between the end plate 22 and the cell assembly 1 remains stable and uniform, improving the overall performance of the battery module 100.

[0060] In some embodiments of the present invention, the minimum thickness of the end plate 22 can be set to be not less than 10 mm, such as 10 mm, 11 mm, 12 mm, 13 mm, etc. This allows the end plate 22 to withstand greater forces, preventing deformation of the end plate 22 when a restraining force is applied to the battery cell assembly 1, thus ensuring the restraining effect of the end plate 22 on the battery cell assembly 1 and improving the reliability of the battery module 100.

[0061] In some embodiments of the present invention, such as Figure 8 As shown, at least one end plate 22 is provided with an end plate flow channel 221, which exchanges heat with at least the battery cell 11 located at the end in the first direction F1. It should be noted that the minimum distance between the end plate flow channel 221 and the sidewall of the end plate 22 facing the battery cell assembly 1 is the minimum thickness of the end plate 22. This allows the end plate 22 to cool the battery cell assembly 1 from the end, thus solving the industry problem that mechanical pressure and temperature control must operate in tandem.

[0062] In some embodiments of the present invention, such as Figure 8 As shown, the end plate flow channel 221 can be located on the side of the end plate 22 away from the cell assembly 1. This completely avoids the risk of the end plate flow channel 221 being flattened and cracked, fundamentally eliminating the possibility of coolant leakage and achieving the best balance between safety and performance.

[0063] In some embodiments of the present invention, the end plate flow channel 221 may be connected to the heat exchange flow channel 33. This reduces the number of required water nozzles 24, simplifies the structure, and lowers costs.

[0064] In some embodiments of the present invention, the end plate flow channel 221 and the heat exchange flow channel 33 can be configured independently. This allows for more precise temperature control of the cell assembly 1, improving the reliability of the battery module 100.

[0065] In some embodiments of the present invention, the battery module 100 further includes an electric heating element, which can be attached to the side of the side plate 21 opposite to the cell assembly 1, and is used to selectively heat the cell assembly 1. Alternatively, the electric heating element can also be attached to the side of the end plate 22 opposite to the cell assembly 1. This allows for better control of the temperature of the cell assembly 1, enabling it to operate under optimal conditions and improving the overall performance of the battery module 100.

[0066] In some embodiments of the present invention, such as Figures 1-2 As shown, the battery module 100 of this embodiment of the invention further includes: a connecting copper busbar 5, which is disposed on one side of the cell group 1 along the third direction F3 and extends along the first direction F1. The connecting copper busbar 5 is electrically connected to a plurality of cells 11 of the cell group 1 respectively, and the connecting copper busbar 5 is used for electrical connection with external components.

[0067] Meanwhile, the housing 2 also includes a protective cover 23, which is located on one side of the cell assembly 1 along the third direction F3 and is connected to the end plate 22 and the side plate 21 respectively. The protective cover 23 can be an insulating part or have an insulating structure, and is used to protect the connecting copper busbar 5. For example, the protective cover 23 can be made of metal materials such as steel or aluminum, and the protective cover 23 can be welded to the side plate 21 and the end plate 22; or, the protective cover 23 can be made of plastic, and the protective cover 23 can be snap-fitted to the end plate 22 and the side plate 21 or glued to them. In this way, the cell assembly 1 can be better protected and the reliability of the battery module 100 can be improved.

[0068] The present invention also proposes a battery pack 1000.

[0069] like Figure 1 As shown, the battery pack 1000 according to an embodiment of the present invention includes: a housing 200 and a battery module 100 according to any of the above embodiments. The housing 200 is provided with a mounting cavity 201, and the battery module 100 is mounted in the mounting cavity 201.

[0070] According to the battery pack 1000 of the present invention, the battery module 100 has strong temperature control capability and good overall performance, which helps to improve the practicality of the battery pack 1000.

[0071] In some embodiments of the present invention, such as Figure 1 As shown, there are multiple battery modules 100, and the housing 200 is provided with inlet and outlet water ports 202. The inlet and outlet water ports 202 are connected to the heat exchange channels 33 of the multiple battery modules 100 respectively through connecting pipes. It should be noted that the connecting pipes can be flexible or rigid pipes, and the present invention does not limit them.

[0072] Specifically, the battery module 100 can be configured as two groups, with the two groups of battery modules 100 arranged along a first direction F1, and multiple battery modules 100 in the same group arranged along a second direction F2. The connecting pipe is located between the two groups of battery modules 100 and is connected to the heat exchange channels 33 of the multiple battery modules 100 respectively. This allows for integrated design, simplifies the structure, and improves the space utilization of the battery pack 1000.

[0073] The present invention also proposes an electrical device.

[0074] According to embodiments of the present invention, an electrical device includes a battery pack 1000 according to any of the above embodiments. It should be noted that the electrical device can be any of the following: a vehicle, a drone, an energy storage station, etc.

[0075] According to the embodiments of the present invention, the battery module 100 of the electrical equipment has strong temperature control capability and good overall performance, which improves the practicality of the battery pack 1000 and enhances the product competitiveness of the electrical equipment.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. 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.

[0077] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery module (100), characterized in that, include: A battery cell assembly (1) is provided with a plurality of battery cells (11) stacked along a first direction (F1). The housing (2) has a receiving cavity for accommodating the battery cell assembly (1). The housing (2) includes two side plates (21), which are respectively located on both sides of the battery cell assembly (1) along a second direction (F2). The second direction (F2) intersects with the first direction (F1). At least one of the two side plates (21) is provided with a heat exchange channel (33) so that the side plate (21) is configured as a heat exchange element (3). Each battery cell (11) exchanges heat with the heat exchange element (3).

2. The battery module (100) according to claim 1, characterized in that, A thermally conductive adhesive layer (4) is sandwiched between the heat exchanger (3) and the battery cell assembly (1).

3. The battery module (100) according to claim 2, characterized in that, The thickness of the thermally conductive adhesive layer (4) ranges from 1 mm to 1.5 mm.

4. The battery module (100) according to claim 1, characterized in that, At least a portion of the heat exchange channel (33) extends along the first direction (F1).

5. The battery module (100) according to claim 2, characterized in that, The housing (2) also includes a water nozzle (24), which is located on one side of the side plate (21) along the first direction (F1). The water nozzle (24) has an inlet (241) and an outlet (242), and the heat exchange channel (33) is connected to the inlet (241) and the outlet (242) respectively.

6. The battery module (100) according to claim 5, characterized in that, The heat exchange channel (33) includes an inlet channel (331) and an outlet channel (332). The inlet channel (331) extends along the first direction (F1), and the outlet channel (332) extends along the first direction (F1). The inlet channel (331) and the outlet channel (332) are arranged along a third direction (F3). The third direction (F3) intersects with the first direction (F1) and the second direction (F2) respectively. The inlet channel (331) is connected to the inlet (241), and the outlet channel (332) is connected to the outlet (242).

7. The battery module (100) according to claim 6, characterized in that, The housing (2) further includes a connecting pipe (25), which includes a first connecting pipe (251) and a second connecting pipe (252). The first connecting pipe (251) and the second connecting pipe (252) are respectively disposed at both ends of the side plate (21) along the first direction (F1). The first connecting pipe (251) is used to connect the inlet channel (331) and the outlet channel (332) to the water nozzle (24) respectively. The second connecting pipe (252) is used to connect the inlet channel (331) and the outlet channel (332).

8. The battery module (100) according to claim 1, characterized in that, The heat exchanger (3) is an integrally extruded part; or, the heat exchanger (3) includes a heat spreader (31) and a harmonica tube (32), the heat spreader (31) exchanges heat with each of the battery cells (11), the harmonica tube (32) is located on the side of the heat spreader (31) away from the battery cell group (1), and the heat exchange channel (33) is defined inside the harmonica tube (32).

9. The battery module (100) according to claim 1, characterized in that, The minimum wall thickness of the heat exchanger (3) is not less than 5 mm.

10. The battery module (100) according to any one of claims 1-9, characterized in that, The housing (2) includes two end plates (22), which are respectively disposed on both sides of the battery cell assembly (1) along the first direction (F1) and are fixedly connected to the side plate (21). The end plates (22) are adapted to limit the engagement with the battery cell assembly (1).

11. The battery module (100) according to claim 10, characterized in that, The flatness of the side of the end plate (22) used for contacting and engaging with the battery cell assembly (1) is less than or equal to 0.2 mm; and / or the minimum thickness of the end plate (22) is not less than 10 mm.

12. The battery module (100) according to claim 10, characterized in that, At least one of the end plates (22) is provided with an end plate flow channel (221), the end plate flow channel (221) is at least heat-exchanging with the battery cell (11) located at the end in the first direction (F1), the end plate flow channel (221) is connected to the heat exchange flow channel (33); or, the end plate flow channel (221) and the heat exchange flow channel (33) are independently provided.

13. A battery pack (1000), characterized in that, include: The housing (200) and the battery module (100) according to any one of claims 1-12, wherein the housing (200) is provided with a mounting cavity (201) and the battery module (100) is installed in the mounting cavity (201).

14. The battery pack (1000) according to claim 13, characterized in that, There are multiple battery modules (100), and the housing (200) is provided with water inlet and outlet (202). The water inlet and outlet (202) are connected to the heat exchange channels (33) of the multiple battery modules (100) through connecting pipes respectively.

15. An electrical appliance, characterized in that, include: The battery pack (1000) according to claim 13 or 14.

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