Heat exchange device, battery module and electric equipment

Abstract

The embodiment of the utility model provides a kind of heat exchange device, battery module and electrical equipment, it is related to battery pack liquid cooling plate technical field.The heat exchange device includes heat exchange plate and at least one heat conduction plate, the inside of heat exchange plate is hollow cavity, heat exchange plate is provided with liquid inlet and liquid outlet, and liquid inlet and liquid outlet are all communicated with cavity.The sidewall of heat exchange plate is provided with at least one first slot;Each first slot is used to insert at least one heat conduction plate, to realize the connection of heat conduction plate and heat exchange plate;Heat transfer is realized between heat conduction plate and heat exchange plate.Cooling liquid is passed into heat exchange plate from liquid inlet, and flows out from liquid outlet, and the heat transferred by heat conduction plate is quickly absorbed by cooling liquid flowing inside, and heat exchange is carried out.This design does not need to set up heat exchange pipeline with liquid path between every two adjacent batteries, to reduce the space occupied by heat exchange device in battery module.In addition, by setting first slot, heat conduction plate can be conveniently and quickly installed and disassembled.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling plate technology for battery packs, and more specifically, to a heat exchange device, a battery module, and an electrical device. Background Technology

[0002] Liquid cooling plates effectively transfer heat from the battery module to heat sinks, maintaining a low battery temperature under all operating conditions and preventing damage from overheating. This technology not only improves battery performance and lifespan but also contributes to vehicle safety, thus playing a crucial role in electric vehicle manufacturing. Applications of liquid cooling plates extend beyond automobiles to include ships, aircraft, communication equipment, and many other fields. The working principle of liquid cooling plates is based on the excess heat generated by the battery during operation in a power battery system. This heat is transferred through contact between the battery or module and the surface of the plate-shaped aluminum device, and is ultimately carried away by the coolant flowing through the internal channels of the device.

[0003] However, most current liquid cooling plates consist of multiple cooling plates and are placed between adjacent batteries, taking up a large amount of space. Utility Model Content

[0004] This utility model provides a heat exchange device, a battery module, and an electrical device that can reduce the space occupied by the heat exchange device within the battery module while ensuring the heat exchange effect.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a heat exchange device, which includes: a heat exchange plate and at least one heat-conducting plate;

[0007] The heat exchange plate has a hollow cavity inside, and the heat exchange plate is provided with a liquid inlet and a liquid outlet, both of which are connected to the cavity.

[0008] The heat exchange plate has at least one first slot on its side wall; each first slot is used to insert at least one heat-conducting plate to connect the heat-conducting plate and the heat exchange plate; heat transfer is achieved between the heat-conducting plate and the heat exchange plate.

[0009] In an optional embodiment, the sidewall of the heat exchange plate is provided with at least one protrusion, and each protrusion has at least one of the first slots.

[0010] In an alternative embodiment, the heat exchange plate has an upper surface and a lower surface that are parallel to each other; the first slot extends in a direction perpendicular to the upper surface and communicates with the upper surface.

[0011] In an optional embodiment, the heat exchange plate is further provided with a second slot, which extends along the length of the upper surface and communicates with the upper surface.

[0012] In an optional embodiment, the first slot is filled with thermally conductive adhesive, and / or the second slot is filled with thermally conductive adhesive.

[0013] In an optional embodiment, the heat exchange device further includes a limiting cover, which is connected to the heat exchange plate and is used to cover the upper surface; the limiting cover has at least one clearance hole, which corresponds one-to-one with the first slot to avoid the heat-conducting plate; and the limiting cover is provided with an anti-detachment structure.

[0014] In an optional embodiment, the heat-conducting plate includes a heat exchange portion and a connecting portion, the heat exchange portion and the connecting portion being connected at an angle, a portion of the heat exchange portion being inserted into the first slot, and the connecting portion being inserted into the second slot.

[0015] An embodiment of this utility model also provides a battery module, including multiple heat exchange devices as described in any of the above embodiments and multiple rows of battery units, wherein the multiple rows of battery units are spaced apart; each heat exchange plate is disposed between two adjacent rows of battery units; each row of battery units includes multiple batteries, the multiple batteries are arranged side by side, and at least one heat-conducting plate is disposed between two adjacent batteries;

[0016] Thermally conductive adhesive is provided between the heat exchange plate and the battery unit to enable thermally conductive connection between the heat exchange plate and the battery unit. The sidewall of the heat exchange plate is provided with at least one protrusion, the thickness of which is greater than or equal to the thickness of the thermally conductive adhesive.

[0017] In an optional embodiment, the battery module further includes foam, with at least one foam disposed between two adjacent batteries, the foam being located between the heat-conducting plate and the battery; wherein the foam has a hollowed-out area.

[0018] An embodiment of this utility model also provides an electrical device, including the battery module described in any of the above embodiments.

[0019] The beneficial effects of the heat exchange device, battery module, and electrical equipment according to the embodiments of this utility model include, for example:

[0020] The heat exchange device includes a heat exchange plate and at least one heat-conducting plate. The heat exchange plate has a hollow cavity and is equipped with a liquid inlet and an outlet, both of which communicate with the cavity. At least one first slot is formed on the side wall of the heat exchange plate; each first slot is used to insert at least one heat-conducting plate to connect the heat exchange plate and the heat-conducting plate, enabling heat transfer between them. Coolant enters the heat exchange plate through the inlet and flows out through the outlet, rapidly absorbing the heat transferred from the heat-conducting plate. This design eliminates the need for heat exchange pipelines with liquid channels between every two adjacent cells, thus reducing the space occupied by the heat exchange device within the battery module. Furthermore, the first slots facilitate quick installation and removal of the heat-conducting plates, saving installation and subsequent maintenance time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the battery module provided in an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the battery module provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the heat exchange device provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the heat exchange plate provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the limiting cover provided in an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the heat-conducting plate provided in an embodiment of this utility model.

[0028] Icons: 1000 - Battery module; 100 - Heat exchanger; 110 - Heat exchange plate; 1111 - Liquid inlet; 1112 - Liquid outlet; 1113 - Second slot; 1114 - Upper surface; 1115 - Lower surface; 112 - Limiting cover; 1121 - Clearance hole; 113 - Protrusion; 1131 - First slot; 120 - Heat-conducting plate; 121 - Heat exchange section; 122 - Connecting section; 200 - Battery unit; 210 - Battery; 300 - Foam; 310 - Hollowed-out area; 400 - Cable tie. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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 this utility model.

[0033] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0035] Liquid cooling plates effectively transfer heat from the battery module to the heat sink, maintaining a low battery temperature under all operating conditions and preventing damage from overheating. This technology not only improves battery performance and lifespan but also contributes to vehicle safety, thus playing a crucial role in electric vehicle manufacturing. Applications of liquid cooling plates extend beyond automobiles to include ships, aircraft, and communication equipment, among others. The working principle of liquid cooling plates is based on the excess heat generated by the battery during operation in the power battery system. This heat is transferred through contact between the battery or module and the surface of the plate-shaped aluminum device, and is ultimately carried away by the coolant flowing through the internal channels of the device. However, most current liquid cooling plates consist of multiple cooling plates placed between adjacent batteries, occupying a significant amount of space.

[0036] Based on this, please refer to Figure 1 , Figure 2 and Figure 3 The heat exchange device 100 provided in the embodiments of this utility model can effectively improve the aforementioned technical problems. This heat exchange device 100 can reduce the space occupied by the heat exchange device 100 within the battery module 1000 while ensuring heat exchange efficiency. The heat exchange device 100 is applied to the battery module 1000, which can be used in electrical equipment. All devices equipped with this heat exchange device 100 have the same functions as described above, and will not be elaborated further here.

[0037] The electrical equipment in this embodiment includes a power-consuming device and a battery module 1000 with the heat exchange device 100. The battery module 1000 provides power to the power-consuming device to enable its various functions. The power-consuming device can be an electric vehicle, with the battery module 1000 installed inside the vehicle body, providing power to the vehicle body to enable its various functions. The power-consuming device can also be a power bank, smart home device, or other electrical equipment, which is not limited here.

[0038] Figure 1 This is a schematic diagram of the battery module 1000 provided in an embodiment of the present utility model; Figure 2 This is an exploded view of the battery module 1000 provided in an embodiment of this utility model. Please refer to... Figure 1 and Figure 2In this embodiment, the battery module 1000 includes multiple heat exchange devices 100 and multiple rows of battery units 200, which are spaced apart. Each heat exchange plate 110 is disposed between two adjacent rows of battery units 200. Each row of battery units 200 includes multiple batteries 210, which are arranged side by side, and at least one heat-conducting plate 120 is disposed between two adjacent batteries 210. Only one heat exchange plate 110 needs to be disposed between two adjacent rows of battery units 200, and then heat exchange between the heat exchange plate 110 and the battery 210 is achieved through the heat-conducting plate 120 inserted into the heat exchange plate 110, thereby cooling or heating the battery 210. It is not necessary to provide liquid cooling components with liquid channels at the bottom of each battery 210 or between two adjacent batteries 210, which greatly reduces the space occupied by the heat exchange devices 100 in the battery module 1000, thereby reducing the size of the entire battery module 1000. The cooling or heating function of the battery 210 can be determined according to the temperature of the coolant introduced through the inlet 1111.

[0039] Furthermore, thermally conductive adhesive is provided between the heat exchange plate 110 and the battery unit 200 to achieve a thermally conductive connection between them. The thermally conductive adhesive has high thermal conductivity; by using it, the heat from the battery unit 200 can be transferred to the heat exchange plate 110 for heat exchange, thus meeting the thermal management requirements of the battery 210. In this embodiment, the sidewall of the heat exchange plate 110 is provided with at least one protrusion 113, the thickness of which is greater than or equal to the thickness of the thermally conductive adhesive. This arrangement helps to limit the thickness of the thermally conductive adhesive, ensuring its consistency and avoiding uneven heat conduction.

[0040] Please see Figure 2 In this embodiment, the battery module 1000 also includes foam 300. At least one foam 300 is disposed between two adjacent batteries 210, and the foam 300 is located between the heat-conducting plate 120 and the battery 210. The foam 300 has a hollowed-out area 310. During charging and discharging, the battery may expand slightly; the foam 300 provides elastic space, reducing the rigid compression between the batteries 210. Furthermore, the foam 300 has good insulation properties, isolating two adjacent batteries 210 and preventing short circuits. Additionally, using a thermally conductive foam 300, such as silicone foam 300, can help balance the temperature between the batteries 210, avoiding localized overheating. In this embodiment, the foam 300 is a U-shaped foam 300 with a hollowed-out area 310. The hollow area 310 provides expansion space for the heat-generating area of ​​the battery 210, and allows the heat-generating area of ​​the battery 210 to directly contact the heat-conducting plate 120, so that heat can be quickly exchanged between the heat-conducting plate 120 and the heat exchange plate 110.

[0041] Figure 3 This is a schematic diagram of the heat exchange device 100 provided in an embodiment of this utility model. Please refer to... Figure 3 In this embodiment, the heat exchange device 100 includes a heat exchange plate 110 and at least one heat-conducting plate 120. The heat exchange plate 110 has a hollow cavity inside and is provided with an inlet 1111 and an outlet 1112, both of which are in communication with the cavity. At least one first slot 1131 is provided on the side wall of the heat exchange plate 110; each first slot 1131 is used to insert at least one heat-conducting plate 120 to connect the heat-conducting plate 120 and the heat exchange plate 110, thus achieving heat transfer between the heat-conducting plate 120 and the heat exchange plate 110. Coolant enters the heat exchange plate 110 through the inlet 1111 and flows out through the outlet 1112, rapidly absorbing the heat transferred from the heat-conducting plate 120 through the internal flow of coolant, thus performing heat exchange. This design eliminates the need for heat exchange pipes with liquid channels between every two adjacent batteries 210, thus reducing the space occupied by the heat exchange device 100 within the battery module 1000. Furthermore, the first slot 1131 facilitates quick installation and removal of the heat-conducting plate 120, saving installation and subsequent maintenance time. The liquid inlet 1111 and liquid outlet 1112 are connected to external water pipes.

[0042] In this embodiment, the heat-conducting plate 120 is disposed in the center of the large surface of the battery 210 and protrudes on the side near the battery 210 terminal post to increase the heat-conducting area.

[0043] Specifically, the thickness of the heat-conducting plate 120 in this embodiment is 0.5mm. Of course, the thickness of the heat-conducting plate 120 can also be other values, depending on the actual application, and is not limited here.

[0044] Figure 4 This is a schematic diagram of the heat exchange plate 110 provided in an embodiment of the present invention. To improve the firmness and stability of the connection between the heat-conducting plate 120 and the heat exchange plate 110, please refer to... Figure 4In this embodiment, the heat exchange plate 110 has at least one protrusion 113 on its sidewall, and each protrusion 113 has at least one first slot 1131. By setting the protrusion 113 and opening the first slot 1131 on the protrusion 113, it is possible to ensure that the size of the internal cavity of the heat exchange plate 110 is not affected, thus ensuring the normal flow of the coolant. It also allows for a deeper first slot 1131, increasing the area of ​​the portion where the heat-conducting plate 120 intersects with the heat exchange plate 110, thereby increasing the heat exchange area. Furthermore, it improves the strength and stability of the connection between the heat-conducting plate 120 and the heat exchange plate 110. In this embodiment, each protrusion 113 has one first slot 1131. Of course, two, three, four, or more first slots 1131 can also be provided on each protrusion 113, and at least one heat-conducting plate 120 can be installed in each first slot 1131. By setting multiple heat-conducting plates 120 between two adjacent batteries 210, the heat generated by the operation of the battery 210 can be quickly transferred to the heat exchange plate 110, avoiding heat accumulation and reducing the temperature difference between the batteries 210, thus preventing local overheating that could lead to performance degradation or thermal runaway.

[0045] Please continue reading. Figure 4 In this embodiment, the heat exchange plate 110 has an upper surface 1114 and a lower surface 1115, which are parallel to each other. The first slot 1131 extends in a direction perpendicular to the upper surface 1114 and communicates with the upper surface 1114. This arrangement facilitates the insertion and removal of the heat-conducting plate 120 from the upper surface 1114 into or from the first slot 1131. This simplifies the installation and removal process and saves installation time.

[0046] Furthermore, the heat exchange plate 110 in this embodiment also has a second slot 1113, which extends along the length of the upper surface 1114 and communicates with it. In this embodiment, the second slot 1113 communicates with the first slot 1131. By providing the second slot 1113, the heat-conducting plate 120 has efficient heat conduction performance. To improve the heat conduction effect between the heat exchange plate 110 and the heat-conducting plate 120, the first slot 1131 in this embodiment is filled with thermally conductive adhesive, and / or, the second slot 1113 is filled with thermally conductive adhesive.

[0047] Figure 6 This is a schematic diagram of the heat-conducting plate 120 provided in an embodiment of this utility model. To increase the heat exchange area between the heat-conducting plate 120 and the heat exchange plate 110 and improve the heat exchange effect, please refer to... Figure 4 and combined Figure 6In this embodiment, the heat-conducting plate 120 includes a heat exchange portion 121 and a connecting portion 122. The heat exchange portion 121 and the connecting portion 122 are connected at an angle. Part of the heat exchange portion 121 is inserted into the first slot 1131, and the connecting portion 122 is inserted into the second slot 1113. Furthermore, by designing the heat-conducting plate 120 as an "L"-shaped plate structure, the heat-conducting plate 120 will not directly detach from the first slot 1131. It must be lifted upwards and removed from the upper surface 1114 of the heat exchange plate 110, thus improving the robustness of the connection between the heat-conducting plate 120 and the heat exchange plate 110. Of course, the heat-conducting plate 120 can also be designed as a straight plate structure, with the heat-conducting plate 120 only inserted into the first slot 1131.

[0048] Figure 5 This is a schematic diagram of the limiting cover 112 provided in an embodiment of the present invention. To prevent the heat-conducting plate 120 from disengaging from the upper surface 1114 of the heat exchange plate 110 from the first slot 1131, please refer to... Figure 5 and combined Figure 3 In this embodiment, the heat exchange device 100 further includes a limiting cover 112, which is connected to the heat exchange plate 110 and serves to cover the upper surface 1114. To prevent the limiting cover 112 from obstructing the first limiting groove and affecting the insertion of the heat-conducting plate 120 into the heat exchange plate 110, the limiting cover 112 in this embodiment has at least one clearance hole 1121, which corresponds one-to-one with the first slot 1131 to avoid the heat-conducting plate 120. Additionally, the limiting cover 112 in this embodiment is provided with an anti-detachment structure. This anti-detachment structure prevents the limiting cover 112 from disconnecting from the heat exchange plate 110. The anti-detachment structure can be an anti-detachment chamfer at the end of the limiting cover 112. Alternatively, the limiting cover 112 and the heat exchange plate 110 can be connected by a snap-fit ​​connection. For example, a slot can be provided on the limiting cover 112, and a snap-fit ​​structure matching the slot can be provided on the heat exchange plate 110; or a snap-fit ​​structure can be provided on the limiting cover 112, and a slot matching the snap-fit ​​structure can be provided on the heat exchange plate 110. Of course, the anti-detachment structure can also be designed as other structures, which are not limited here.

[0049] The working principle of the heat exchange device 100 provided in this embodiment is as follows:

[0050] Coolant is introduced into the cavity of heat exchange plate 110 through inlet 1111 and flows out through outlet 1112, circulating within the cavity of heat exchange plate 110. Heat conduction plate 120 contacts battery 210, exchanging heat generated by battery 210 with the heat of coolant within heat exchange plate 110, thereby cooling or heating battery 210 to meet its operational needs.

[0051] The installation process of a battery module 1000 provided in this embodiment is as follows:

[0052] First, connect the first battery 210 to the end plate, then connect the battery 210 to the foam 300, and finally connect the heat-conducting plate 120 to the battery 210 using thermally conductive structural adhesive. Next, connect the foam 300 to the heat-conducting plate 120, and then install the second battery 210. Repeat the above installation steps to install one row of batteries 210, and then bundle the installed row of batteries 210 with cable ties 400. Next, install the heat exchange plate 110, inserting multiple heat-conducting plates 120 along the first slot 1131 of the heat exchange plate 110. Then install another row of batteries 210 on the other side of the heat exchange plate 110. Repeat the above operations to install the heat exchange plate 110 between any two adjacent rows of batteries 210.

[0053] In summary, the heat exchange device 100 includes a heat exchange plate 110 and at least one heat-conducting plate 120. The heat exchange plate 110 has a hollow cavity inside and is provided with an inlet 1111 and an outlet 1112, both of which are connected to the cavity. At least one first slot 1131 is provided on the side wall of the heat exchange plate 110; each first slot 1131 is used to insert at least one heat-conducting plate 120 to connect the heat-conducting plate 120 and the heat exchange plate 110, thus achieving heat transfer between the heat-conducting plate 120 and the heat exchange plate 110. Coolant enters the heat exchange plate 110 through the inlet 1111 and flows out through the outlet 1112, rapidly absorbing the heat transferred from the heat-conducting plate 120 through the internal flow of coolant, thus performing heat exchange. This design eliminates the need for heat exchange pipelines with liquid channels between every two adjacent batteries 210, thereby reducing the space occupied by the heat exchange device 100 within the battery module 1000. Furthermore, the first slot 1131 facilitates quick installation and removal of the heat-conducting plate 120, saving installation and subsequent maintenance time.

[0054] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A heat exchange device, characterized in that, It includes a heat exchange plate (110) and at least one heat-conducting plate (120); The heat exchange plate (110) has a hollow cavity inside. The heat exchange plate (110) is provided with a liquid inlet (1111) and a liquid outlet (1112). Both the liquid inlet (1111) and the liquid outlet (1112) are connected to the cavity. The heat exchange plate (110) has at least one first slot (1131) on its side wall; each first slot (1131) is used to insert at least one heat conduction plate (120) to connect the heat conduction plate (120) and the heat exchange plate (110); heat transfer is realized between the heat conduction plate (120) and the heat exchange plate (110).

2. The heat exchange device according to claim 1, characterized in that, The heat exchange plate (110) has at least one protrusion (113) on its side wall, and each protrusion (113) has at least one of the first slots (1131).

3. The heat exchange device according to claim 1, characterized in that, The heat exchange plate (110) has an upper surface (1114) and a lower surface (1115) that are parallel to each other; the first slot (1131) extends in a direction perpendicular to the upper surface (1114) and communicates with the upper surface (1114).

4. The heat exchange device according to claim 3, characterized in that, The heat exchange plate (110) is also provided with a second slot (1113), which extends along the length of the upper surface (1114) and communicates with the upper surface (1114).

5. The heat exchange device according to claim 4, characterized in that, The first slot (1131) is filled with thermally conductive adhesive, and / or the second slot (1113) is filled with thermally conductive adhesive.

6. The heat exchange device according to claim 4, characterized in that, The heat exchange device (100) further includes a limiting cover (112), which is connected to the heat exchange plate (110) and is used to cover the upper surface (1114). The limiting cover (112) has at least one clearance hole (1121), which corresponds one-to-one with the first slot (1131) to avoid the heat-conducting plate (120); and the limiting cover (112) is provided with an anti-detachment structure.

7. The heat exchange device according to claim 4, characterized in that, The heat-conducting plate (120) includes a heat exchange part (121) and a connecting part (122). The heat exchange part (121) and the connecting part (122) are connected at an angle. A portion of the heat exchange part (121) is inserted into the first slot (1131), and the connecting part (122) is inserted into the second slot (1113).

8. A battery module, characterized in that, The device includes a heat exchange device (100) as described in any one of claims 1-7 and multiple rows of battery cells (200), wherein the multiple rows of battery cells (200) are spaced apart; each heat exchange plate (110) is disposed between two adjacent rows of battery cells (200); each row of battery cells (200) includes multiple batteries (210), the multiple batteries (210) are arranged side by side, and at least one heat-conducting plate (120) is disposed between two adjacent batteries (210); Thermally conductive adhesive is provided between the heat exchange plate (110) and the battery unit (200) to make the heat exchange plate (110) and the battery unit (200) thermally connected. The side wall of the heat exchange plate (110) is provided with at least one protrusion (113), and the thickness of the protrusion (113) is greater than or equal to the thickness of the thermally conductive adhesive.

9. The battery module according to claim 8, characterized in that, The battery module (1000) further includes foam (300), and at least one foam (300) is disposed between two adjacent batteries (210). The foam (300) is located between the heat-conducting plate (120) and the battery (210); wherein the foam (300) is provided with a hollow area (310).

10. An electrical appliance, characterized in that, Includes the battery module (1000) as described in claim 8 or 9.

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