Battery module and electric device

Abstract

This application relates to the field of battery technology, and specifically discloses a battery module and electrical device, including a liquid cooling plate; multiple battery cells, which are sequentially disposed on the liquid cooling plate along a first direction, each battery cell including two first sides disposed opposite each other along the first direction, two second sides disposed opposite each other along a second direction, and two third sides disposed opposite each other along a third direction; multiple heat-conducting components disposed on the liquid cooling plate, each heat-conducting component covering a portion of the outer surface of a battery cell, each heat-conducting component having a receiving cavity, and a single battery cell being installed in a single receiving cavity; the inner wall of the single receiving cavity along the first direction is attached to the first side of the single battery cell, the inner wall of the single receiving cavity along the second direction is attached to the second side of the single battery cell, the inner wall of the single receiving cavity along the third direction is attached to the third side of the single battery cell, and one outer side of the receiving cavity is attached to the liquid cooling plate. Through the above method, this application embodiment can improve the thermal conductivity of the battery cells.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module and electrical equipment. Background Technology

[0002] With increasing global emphasis on environmental protection, batteries are being used more and more widely. For example, in electric vehicles, multiple batteries can be assembled into battery modules to meet the power requirements of the vehicle. Batteries generate a significant amount of heat during operation. If this heat is not properly managed, it can reduce the lifespan of the battery modules and pose safety hazards. Therefore, proper heat dissipation for battery modules is crucial. Related technologies primarily utilize liquid cooling to dissipate heat from battery modules. Typically, the battery modules are mounted on a liquid cooling plate, which then conducts heat to the bottom of the battery module.

[0003] In the process of developing this application, the inventors discovered that in related technologies, heat conduction is only carried out on the bottom of the battery module, resulting in low heat conduction efficiency of the battery module and generally poor heat dissipation, which can easily affect the normal operation of the battery module. Utility Model Content

[0004] In view of the above problems, this application provides a battery module and electrical equipment that overcomes or at least partially solves the above problems.

[0005] According to one aspect of this application, a battery module is provided, including a liquid cooling plate; a plurality of battery cells stacked on the liquid cooling plate along a first direction, each battery cell including two first sides disposed opposite to each other along the first direction, two second sides disposed opposite to each other along a second direction, and two third sides disposed opposite to each other along a third direction, the first direction, the second direction, and the third direction being perpendicular to each other; a plurality of heat-conducting elements disposed on the liquid cooling plate, one of the heat-conducting elements covering a portion of the outer surface of one of the battery cells, the heat-conducting element having a receiving cavity, and a single battery cell being installed in a single receiving cavity; wherein, the inner wall of the single receiving cavity along the first direction is attached to one of the first sides of the single battery cell, the inner wall of the single receiving cavity along the second direction is attached to one of the second sides of the single battery cell, and the inner wall of the single receiving cavity along the third direction is attached to one of the third sides of the single battery cell.

[0006] In one alternative embodiment, a single thermally conductive element includes a first thermally conductive sheet, a second thermally conductive sheet, and a third thermally conductive sheet. The first, second, and third thermally conductive sheets are interconnected and perpendicular to each other. The first, second, and third thermally conductive sheets enclose the receiving cavity. The first thermally conductive sheet is attached to one of the first sides of a single battery cell, the second thermally conductive sheet is attached to one of the second sides of a single battery cell, and the third thermally conductive sheet is attached to one of the third sides of a single battery cell. The third thermally conductive sheet is located between the battery cell and the liquid cooling plate.

[0007] In one alternative embodiment, the battery module includes thermally conductive adhesive disposed on the inner wall of the receiving cavity, the thermally conductive adhesive being located between the individual battery cell and the individual thermally conductive element.

[0008] In an alternative embodiment, the heat-conducting component is further provided with a plurality of vent holes communicating with the receiving cavity, the plurality of vent holes being spaced apart from each other.

[0009] In an alternative embodiment, the battery module further includes a heat-insulating adhesive disposed on the side of a single thermal conductive element away from a single battery cell, the heat-insulating adhesive being located on the side of the first thermal conductive sheet away from a single battery cell, the heat-insulating adhesive being located between two adjacent battery cells, and the heat-insulating adhesive being elastic.

[0010] In one alternative, heat from the first and second heat-conducting sheets can be at least partially conducted to the third heat-conducting sheet, which is attached to the liquid cooling plate.

[0011] In one optional embodiment, the liquid cooling plate is provided with a liquid flow cavity and an inlet and an outlet communicating with the liquid flow cavity. The liquid flow cavity includes a diversion zone, a confluence zone, and a liquid flow area. The diversion zone is connected to the inlet, the confluence zone is connected to the outlet, and the liquid flow area is located between the diversion zone and the confluence zone. External coolant enters from the inlet, flows through the diversion zone, the liquid flow area, and the confluence zone until it flows out from the outlet.

[0012] In one alternative embodiment, the liquid flow zone includes a plurality of liquid flow channels arranged parallel to each other along a first direction, and the liquid flow channels connect the inlet and the outlet.

[0013] In one alternative embodiment, at least one redundant flow channel is further provided within the liquid flow chamber. One end of the redundant flow channel is connected to the liquid outlet, and the other end of the redundant flow channel is connected to the confluence area. The redundant flow channel is located between the liquid outlet and the confluence area.

[0014] According to another aspect of this application, an electrical device is provided, including the battery module as described above.

[0015] The beneficial effects of this application embodiment are as follows: Unlike the prior art, this application embodiment includes a liquid cooling plate, multiple battery cells, and multiple heat-conducting components. Multiple battery cells are sequentially disposed on the liquid cooling plate along a first direction. Each battery cell includes two first sides disposed opposite each other along the first direction, two second sides disposed opposite each other along a second direction, and two third sides disposed opposite each other along a third direction. The first, second, and third directions are perpendicular to each other. Multiple heat-conducting components are disposed on the liquid cooling plate. One heat-conducting component covers a portion of the outer surface of a battery cell. Each heat-conducting component has a receiving cavity. A single battery cell is installed within a single receiving cavity. The inner wall of the single receiving cavity along the first direction is attached to one of the first sides of the single battery cell. The inner wall along the second direction is attached to one of the second sides of a single battery cell, and the inner wall along the third direction of a single receiving cavity is attached to one of the third sides of a single battery cell. One of the outer sides of the receiving cavity is attached to a liquid cooling plate. With this configuration, compared to the related technology that only conducts heat to the bottom of the battery cell, in this embodiment, the user uses the heat-conducting component to contact multiple sides of the battery cell, thereby increasing the contact area between the heat-conducting component and the battery cell, and thus achieving heat conduction to multiple sides of the battery cell. This can improve the heat conduction efficiency of the battery cell and ensure the normal operation of the battery module. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the overall structure of the battery module according to an embodiment of this application;

[0018] Figure 2 This is a partial exploded view of the battery module structure according to an embodiment of this application;

[0019] Figure 3 This is another exploded view of the battery module structure according to an embodiment of this application;

[0020] Figure 4 This is a partial structural schematic diagram of the battery module according to an embodiment of this application;

[0021] Figure 5 This is a side cross-sectional view of the battery module according to an embodiment of this application. Detailed Implementation

[0022] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0024] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0025] Please see Figures 1-3 The battery module 1000 includes a liquid cooling plate 10, multiple battery cells 20, and multiple heat-conducting components 30. The multiple battery cells 20 and the multiple heat-conducting components 30 are all disposed on the liquid cooling plate 10. A heat-conducting component 30 covers part of the outer surface of a battery cell 20 and is used to conduct the heat generated by the battery cell 20 to the liquid cooling plate 10.

[0026] The battery module also includes thermally conductive adhesive 40, thermally insulating adhesive 50, and a control module 60. The thermally conductive adhesive 40 is disposed between a single battery cell 20 and a single thermally conductive component 30. The thermally conductive adhesive 40 can be used to fix the battery cell 20 to the thermally conductive component 30. At the same time, the thermally conductive adhesive 40 is used to conduct the heat generated by the battery cell 20 to the thermally conductive component 30, and then conduct the heat to the liquid cooling plate 10 through the thermally conductive component 30. The thermally insulating adhesive 50 is located between two adjacent battery cells 20. The thermally insulating adhesive 50 can reduce the impact of the heat generated by one battery cell 20 on the other adjacent battery cell 20. The control module 60 is electrically connected to multiple battery cells 20.

[0027] To better explain the structure of the battery module 1000, it will be described in conjunction with the first direction X, the second direction Y, and the third direction Z (vertical direction), wherein the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0028] For the liquid cooling plate 10 mentioned above, such as Figure 4 and Figure 5As shown, the liquid cooling plate 10 dissipates heat generated by the battery cell 20 by circulating internal coolant (such as water, ethylene glycol, etc.). The liquid cooling plate 10 is provided with a liquid flow chamber 101 and an inlet 102 and an outlet 103 connecting the liquid flow chamber 101. The liquid flow chamber 101 includes a diversion zone 1011, a confluence zone 1012, and a liquid flow zone 1013. The diversion zone 1011 is connected to the inlet 102, the confluence zone 1012 is connected to the outlet 103, and the liquid flow zone 1013 is located between the diversion zone 1011 and the confluence zone 1012. External coolant enters from the inlet 102 and flows through the diversion zone 1011, the liquid flow zone 1013, and the confluence zone 101. 2. The low-temperature coolant enters from the inlet 102 and absorbs the heat generated by the battery cell 20 in the diversion zone 1011, the flow zone 1013 and the confluence zone 1012, becoming high-temperature coolant that flows out from the outlet 103. After flowing out from the outlet 103, the high-temperature coolant enters the external radiator or cooling device. Through heat exchange with the outside air, the high-temperature coolant dissipates heat to the external environment, and the temperature of the coolant decreases. The cooled coolant then enters again from the inlet 102, and so on.

[0029] In some embodiments, the liquid flow zone 1013 includes a plurality of liquid flow channels 1013a, which are arranged parallel to each other along a first direction X. The liquid flow channels 1013a are connected to the inlet 102 through the diversion zone 1011 and to the outlet 103 through the confluence zone 1012. The parallel distribution of the liquid flow channels 1013a enables the coolant to be distributed more evenly on the entire liquid cooling plate 10, thereby reducing local overheating, improving the uniformity of heat dissipation to the battery cell 20, helping to reduce the temperature difference inside the battery module, ensuring that the temperature of each part of the battery module remains consistent during operation, thereby improving the stability and reliability of the system.

[0030] In some embodiments, at least one redundant flow channel 1014 is also provided in the liquid flow cavity 101. One end of the redundant flow channel 1014 is connected to the liquid outlet 103, and the other end of the redundant flow channel 1014 is connected to the confluence area 1012. The redundant flow channel 1014 is located between the liquid outlet 103 and the confluence area 1012. Under normal circumstances, after the coolant flows to the confluence area 1012, it flows towards the liquid outlet 103 through the main flow channel. If the main flow channel between the confluence area 1012 and the liquid outlet 103 is blocked or damaged, the coolant can flow from the redundant flow channel 1014 to the liquid outlet 103, thereby ensuring the continuous operation of the heat dissipation system of the liquid cooling plate 10. At the same time, the redundant flow channel 1014 can guide some of the coolant to other areas, further optimizing the distribution of coolant, making the heat distribution more uniform, and reducing local overheating.

[0031] Regarding the aforementioned battery cell 20 and control module 60, as Figure 1 and Figure 2 As shown, multiple battery cells 20 are sequentially arranged on a liquid cooling plate 10 along a first direction X. A control module 60 is disposed at the end of a battery cell 20 facing away from the liquid cooling plate 10, and the control module 60 is electrically connected to the battery cell 20. It should be noted that the multiple battery cells 20 can be electrically connected to the control module 60 in series or parallel, and this application does not impose specific limitations. In some embodiments, the control module 60 is a battery management system (BMS) board, mainly used for monitoring the voltage, current, and temperature of the battery cells 20, as well as managing charging and discharging.

[0032] In some embodiments, please refer to the following: Figure 3 The battery cell 20 includes two first side surfaces 201 disposed opposite to each other along a first direction X, two second side surfaces 202 disposed opposite to each other along a second direction Y, and two third side surfaces 203 disposed opposite to each other along a third direction Z.

[0033] For the aforementioned heat-conducting component 30, such as Figures 1-3 As shown, a heat-conducting element 30 is disposed on the liquid cooling plate 10. One heat-conducting element 30 covers a portion of the outer surface of a battery cell 20. The heat-conducting element 30 has a receiving cavity 30a, and a single battery cell 20 is installed within a single receiving cavity 30a. The heat generated by the battery cell 20 can be conducted to the liquid cooling plate 10 through the heat-conducting element 30 covering its outer surface. The receiving cavity 30a on the heat-conducting element 30 is used for the installation of the battery cell 20. It is understood that the number of heat-conducting elements 30 corresponds to the number of battery cells 20, but this application does not impose a specific limitation.

[0034] In some embodiments, the inner wall of a single receiving cavity 30a along the first direction X is attached to one of the first side surfaces 201 of a single battery cell 20, the inner wall of a single receiving cavity 30a along the second direction Y is attached to one of the second side surfaces 202 of a single battery cell 20, and the inner wall of a single receiving cavity 30a along the third direction Z is attached to one of the third side surfaces 203 of a single battery cell 20. By using the receiving cavities 30a on the heat-conducting element 30 to attach to different sides of the battery cell 20, the contact area between the heat-conducting element 30 and the battery cell 20 is increased, thereby improving the heat conduction efficiency of the heat-conducting element 30 to the battery cell 20. In some embodiments, one of the outer side surfaces of the receiving cavity 30a is attached to a liquid cooling plate 10, and the heat generated by the battery cell 20 can be conducted to the liquid cooling plate 10 through the heat-conducting element 30.

[0035] In some embodiments, please refer to Figure 3Each heat-conducting element 30 includes a first heat-conducting sheet 301, a second heat-conducting sheet 302, and a third heat-conducting sheet 303. The first heat-conducting sheet 301, the second heat-conducting sheet 302, and the third heat-conducting sheet 303 are connected to each other and perpendicular to each other. The first heat-conducting sheet 301, the second heat-conducting sheet 302, and the third heat-conducting sheet 303 are attached to one of the first sides 201 of the single battery cell 20. The second heat-conducting sheet 302 is attached to one of the second sides 202 of the single battery cell 20. The third heat-conducting sheet 303 is attached to one of the third sides 203 of the single battery cell 20. The third heat-conducting sheet 303 is located between the battery cell 20 and the liquid cooling plate 10. The third heat-conducting sheet 303 contacts the liquid cooling plate 10, and heat exchange occurs between the third heat-conducting sheet 303 and the liquid cooling plate 10. A first heat-conducting sheet 301 is used to conduct heat to one of the first sides 201 of a single battery cell 20, a second heat-conducting sheet 302 is used to conduct heat to one of the second sides 202 of a single battery cell 20, and a third heat-conducting sheet 303 is used to conduct heat to one of the third sides 203 of a single battery cell 20. Using different heat-conducting sheets to conduct heat to different sides of a single battery cell 20 helps to improve the heat conduction efficiency of the single battery cell 20. It is understood that the materials used to make the first heat-conducting sheet 301, the second heat-conducting sheet 302, and the third heat-conducting sheet 303 can be the same or different, and their thermal conductivity can be the same or different. Users can set these parameters according to their actual needs; no specific limitations are made in this application.

[0036] In some embodiments, the heat-conducting component 30 is further provided with a plurality of vent holes 30b communicating with the receiving cavity 30a. The plurality of vent holes 30b are spaced apart from each other. When the thermally conductive adhesive 40 is filled between the heat-conducting component 30 and the battery cell 20, the battery cell 20 squeezes the thermally conductive adhesive 40, and the thermally conductive adhesive 40 flows to fill the gap between the heat-conducting component 30 and the battery cell 20. The vent holes 30b can be used to expel the air between the heat-conducting component 30 and the battery cell 20. The vent holes 30b can reduce the formation of air bubbles on the thermally conductive adhesive 40. During the adhesive injection process, the vent holes 30b can also serve as overflow holes to discharge excess thermally conductive adhesive 40 and prevent adhesive from accumulating in unwanted locations. By expelling air and excess adhesive, the vent holes 30b can ensure close contact between the heat-conducting sheet and the battery cell 20, reduce thermal resistance, and improve heat dissipation efficiency.

[0037] For the aforementioned thermally conductive adhesive 40 and thermally insulating adhesive 50, such as Figure 3 and Figure 4As shown, thermally conductive adhesive 40 is disposed on the inner wall of the receiving cavity 30a. The thermally conductive adhesive 40 is located between a single battery cell 20 and a single thermally conductive element 30, serving to conduct heat. Simultaneously, the thermally conductive adhesive 40 helps to relatively fix the single battery cell 20 to the single thermally conductive element 30. Thermally insulating adhesive 50 is disposed on the side of the single thermally conductive element 30 facing away from the single battery cell 20. The thermally insulating adhesive 50 is located on the side of the first thermally conductive sheet 301 facing away from the single battery cell 20, and between two adjacent battery cells 20. The thermally insulating adhesive 50 is elastic. This arrangement allows the thermally insulating adhesive 50 to isolate heat between adjacent battery cells 20, reducing the impact of heat generated by one battery cell 20 on adjacent battery cells 20. Furthermore, when the battery cell 20 undergoes a "breathing effect," the elastic thermally insulating adhesive 50 provides space to allow for the expansion of the battery cell 20. The "breathing effect" of cell 20 refers to the phenomenon that the volume of cell 20 changes periodically due to the insertion and extraction of lithium ions in the electrode material during the charging and discharging process.

[0038] In some embodiments, the heat on the first heat-conducting sheet 301 and the second heat-conducting sheet 302 can be at least partially conducted to the third heat-conducting sheet 303, and the third heat-conducting sheet 303 is used to conduct the heat to the liquid cooling plate 10 for heat dissipation. Since the heat-insulating adhesive 50 is located on the side of the first heat-conducting sheet 301 away from the individual battery cell 20, and the heat-insulating adhesive 50 is located between two adjacent battery cells 20, this arrangement can reduce the impact of the heat generated by the battery cell 20 on adjacent battery cells 20. Furthermore, the heat generated by the individual battery cell 20 can be at least partially transferred to the third heat-conducting sheet 303 through the first heat-conducting sheet 301 and the second heat-conducting sheet 302, reducing the heat generated by the individual battery cell 20 from being conducted to adjacent battery cells 20 through the first heat-conducting sheet 301, thereby reducing the impact on adjacent battery cells 20.

[0039] In this embodiment, a liquid cooling plate 10, multiple battery cells 20, and multiple heat-conducting components 30 are provided. The multiple battery cells 20 are sequentially disposed on the liquid cooling plate 10 along a first direction X. Each battery cell 20 includes two first side surfaces 201 opposite each other along the first direction X, two second side surfaces 202 opposite each other along the second direction Y, and two third side surfaces 203 opposite each other along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. Multiple heat-conducting components 30 are disposed on the liquid cooling plate 10. One heat-conducting component 30 covers a portion of the outer surface of a battery cell 20. Each heat-conducting component 30 has a receiving cavity 30a. A single battery cell 20 is installed within a single receiving cavity 30a, wherein the inner wall of the single receiving cavity 30a along the first direction X is attached to the first side surface 201 of the single battery cell 20. 01. The inner wall of a single receiving cavity 30a along the second direction Y is attached to the second side 202 of a single battery cell 20, and the inner wall of a single receiving cavity 30a along the third direction Z is attached to the third side 203 of a single battery cell 20. One of the outer sides of the receiving cavity 30a is attached to a liquid cooling plate 10. With this configuration, compared with the related technology which only conducts heat to the bottom of the battery cell 20, in this embodiment, the user uses the heat-conducting component 30 to contact multiple sides of the battery cell 20, thereby increasing the contact area between the heat-conducting component 30 and the battery cell 20, and thus achieving heat conduction to multiple sides of the battery cell 20. This can improve the heat conduction efficiency of the battery cell 20, thereby ensuring the normal operation of the battery module.

[0040] This application also provides an embodiment of an electrical device, which includes the battery module described above. The function and structure of the battery module can be found in the above embodiments, and will not be repeated here. It is understood that the electrical device includes, but is not limited to, new energy vehicles, electric ships, computers, medical equipment, drones, intelligent robots, etc.

[0041] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A battery module, characterized in that, include: Liquid cooling plate; Multiple battery cells are sequentially disposed on the liquid cooling plate along a first direction. Each battery cell includes two first side surfaces disposed opposite each other along the first direction, two second side surfaces disposed opposite each other along a second direction, and two third side surfaces disposed opposite each other along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. Multiple heat-conducting components are disposed on the liquid cooling plate, one of the heat-conducting components covers a portion of the outer surface of a battery cell, the heat-conducting component is provided with a receiving cavity, and a single battery cell is installed in a single receiving cavity; Wherein, the inner wall of a single receiving cavity along the first direction is attached to one of the first sides of a single battery cell, the inner wall of a single receiving cavity along the second direction is attached to one of the second sides of a single battery cell, and the inner wall of a single receiving cavity along the third direction is attached to one of the third sides of a single battery cell. One of the outer surfaces of the receiving cavity is attached to the liquid cooling plate.

2. The battery module according to claim 1, characterized in that, Each of the heat-conducting components includes a first heat-conducting sheet, a second heat-conducting sheet, and a third heat-conducting sheet. The first heat-conducting sheet, the second heat-conducting sheet, and the third heat-conducting sheet are connected to each other and perpendicular to each other. The first heat-conducting sheet, the second heat-conducting sheet, and the third heat-conducting sheet are attached to one of the first sides of the single battery cell. The third heat-conducting sheet is attached to one of the third sides of the single battery cell. The third heat-conducting sheet is located between the battery cell and the liquid cooling plate.

3. The battery module according to claim 1, characterized in that, The battery module includes thermally conductive adhesive, which is disposed on the inner wall of the receiving cavity and located between the individual battery cell and the individual thermally conductive component.

4. The battery module according to claim 3, characterized in that, The heat-conducting component is also provided with a plurality of vent holes that communicate with the receiving cavity, and the plurality of vent holes are spaced apart from each other.

5. The battery module according to claim 2, characterized in that, The battery module also includes a heat-insulating adhesive, which is disposed on the side of a single heat-conducting element away from a single battery cell. The heat-insulating adhesive is located on the side of the first heat-conducting sheet away from a single battery cell and between two adjacent battery cells. The heat-insulating adhesive is elastic.

6. The battery module according to claim 5, characterized in that, The heat from the first and second heat-conducting sheets can be at least partially conducted to the third heat-conducting sheet, which is attached to the liquid cooling plate.

7. The battery module according to claim 1, characterized in that, The liquid cooling plate is provided with a liquid flow cavity and an inlet and an outlet connecting the liquid flow cavity. The liquid flow cavity includes a diversion zone, a confluence zone, and a liquid flow area. The diversion zone is connected to the inlet, the confluence zone is connected to the outlet, and the liquid flow area is located between the diversion zone and the confluence zone. External coolant enters from the inlet, flows through the diversion zone, the liquid flow area, and the confluence zone until it flows out from the outlet.

8. The battery module according to claim 7, characterized in that, The liquid flow zone includes multiple liquid flow channels, which are arranged parallel to each other along a first direction, and the liquid flow channels connect the liquid inlet and the liquid outlet.

9. The battery module according to claim 7, characterized in that, The liquid flow chamber is also provided with at least one redundant flow channel. One end of the redundant flow channel is connected to the liquid outlet, and the other end of the redundant flow channel is connected to the confluence area. The redundant flow channel is located between the liquid outlet and the confluence area.

10. An electrical appliance, characterized in that, Includes the battery module as described in any one of claims 1-9.

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