Shell, single battery, battery assembly and electric device

Abstract

The utility model provides a shell, a single battery comprising the shell, a battery assembly comprising the single battery and an electric device comprising the battery assembly or the single battery. The shell is used for a single battery, the shell is provided with a containing cavity, the containing cavity is used for containing a pole core of the single battery, at least one side wall of the shell is provided with a flow channel, the flow channel penetrates through the shell in the first direction, and the two ends of the shell in the first direction are provided with a liquid inlet and a liquid outlet. And the cooling liquid can directly flow in the flow channel of the single battery shell, so that the heat exchange efficiency of the battery is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of batteries, in particular, to a shell, a single battery comprising the shell, a battery assembly comprising the single battery, and a power-using device comprising the battery assembly or the single battery. BACKGROUND

[0002] At present, the heat dissipation mode of the battery is to bond the battery and the cold plate through the heat-conducting glue, and the heat generated by the battery is taken away by the flow of the cooling liquid, but the heat-conducting coefficient of the heat-conducting glue is low, and the heat dissipation capacity is limited. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome one of the above technical problems, the present disclosure provides a shell, a single battery comprising the shell, a battery assembly comprising the single battery, and a power-using device comprising the battery assembly or the single battery.

[0004] The first object of the present disclosure is to provide a shell, the shell has a containing cavity for containing the pole core of a single battery, at least one side wall of the shell is provided with a flow channel, the flow channel penetrates through the shell along a first direction, and the two ends of the shell along the first direction are provided with a liquid inlet and a liquid outlet. The integrated manner of the flow channel and the single battery makes the cooling liquid flow directly in the flow channel of the shell of the single battery, cancels the design of the traditional cold plate, and does not need to bond the cold plate and the single battery through the heat-conducting glue for heat conduction, thereby reducing the thermal resistance between the cooling liquid and the single battery, greatly improving the heat exchange efficiency, and the design that the flow channel penetrates through the shell simplifies the structure and facilitates the communication with the external medium source.

[0005] As an optional solution of the present disclosure, the shell comprises a shell body and a connecting part, at least one end of the shell body is connected with the connecting part along the first direction, the connecting part protrudes from the end face of the shell body, and the flow channel penetrates through the connecting part.

[0006] As an optional solution of the present disclosure, the distance between the end face of the connecting part away from the shell body and the end face of the shell body is less than 30 mm.

[0007] As an optional solution of the present disclosure, at least one end in the flow channel is provided with a reinforcing part along the first direction, and the reinforcing part extends along the first direction.

[0008] As an optional solution of the present disclosure, both ends in the flow channel are provided with a reinforcing part along the first direction.

[0009] As an optional solution of the present disclosure, one end of the reinforcing part is flush with the liquid inlet, and the other end of the reinforcing part is flush with the liquid outlet.

[0010] As an optional solution of the present disclosure, the length of the reinforcing part is less than or equal to one fourth of the length of the shell.

[0011] As an optional solution of the present disclosure, the number of the reinforcing portions is multiple, the multiple reinforcing portions are arranged at intervals along the second direction and separate the flow channel into multiple sub-flow channels, and the first direction and the second direction intersect.

[0012] As an optional solution of the present disclosure, the shell comprises a shell body and at least one cover plate, the cover plate covers the end of the shell body along the first direction to form a containing cavity, and at least one side wall of the shell body is internally formed with a cavity to form the flow channel, and the two ends of the cavity along the first direction penetrate through the at least one side wall to form the liquid inlet and the liquid outlet.

[0013] As an optional solution of the present disclosure, the shell body comprises two first side walls oppositely arranged in the second direction and two second side walls oppositely arranged in the third direction, the area of the first side wall is larger than the area of the second side wall, and the flow channel is arranged in at least one of the two second side walls, and the first direction, the second direction and the third direction respectively intersect with each other.

[0014] A second object of the present disclosure is to provide a single battery comprising a pole core and a shell provided by the present disclosure, and the pole core is accommodated in the containing cavity.

[0015] A third object of the present disclosure is to provide a battery assembly comprising a liquid inlet assembly, a liquid outlet assembly and multiple single batteries provided by the present disclosure, the liquid inlets of the flow channels of the multiple single batteries are respectively communicated with the liquid inlet assembly, and the liquid outlets of the flow channels of the multiple single batteries are respectively communicated with the liquid outlet assembly.

[0016] As an optional solution of the present disclosure, the liquid inlet assembly comprises a flow dividing member, the liquid outlet assembly comprises a flow converging member, the flow dividing member is internally provided with a flow dividing channel, the flow converging member is internally provided with a flow converging channel, the flow dividing member is provided with multiple flow dividing ports, the flow converging member is provided with multiple flow converging ports, the flow dividing ports and the liquid inlets are one-to-one correspondingly communicated, and the flow converging ports and the liquid outlets are one-to-one correspondingly communicated.

[0017] As an optional solution of the present disclosure, the liquid inlet assembly further comprises a liquid inlet member, the liquid outlet assembly further comprises a liquid outlet member, the liquid inlet member is angularly connected with the flow dividing member, and / or the liquid outlet member is angularly connected with the flow converging member, the liquid inlet member is provided with a liquid inlet connector, and the liquid outlet member is provided with a liquid outlet connector.

[0018] As an optional solution of the present disclosure, the shell comprises a shell body and a connecting portion, along the first direction, both ends of the shell body are connected with the connecting portion, the connecting portion protrudes from the end face of the shell body, the flow channel penetrates through the connecting portion, the two connecting portions respectively have the liquid inlet and the liquid outlet, multiple flow dividing pipes are respectively arranged on the multiple flow dividing ports, multiple flow converging pipes are respectively arranged on the multiple flow converging ports, the flow dividing pipes and the connecting portion are one-to-one correspondingly connected to make the flow dividing ports and the liquid inlets one-to-one correspondingly communicated, and the flow converging pipes and the connecting portion are one-to-one correspondingly connected to make the flow converging ports and the liquid outlets one-to-one correspondingly communicated.

[0019] As an optional solution of the present disclosure, the liquid inlet assembly and the single battery are insulatedly connected, and / or the liquid outlet assembly and the single battery are insulatedly connected.

[0020] A fourth object of the present disclosure is to provide an electric device, which is provided with the battery assembly provided by the present disclosure or the single battery provided by the present disclosure.

[0021] The present disclosure improves the heat exchange efficiency of the battery by providing the flow channel in at least one side wall of the single battery shell, so that the cooling liquid can flow in the flow channel under the pole core.

[0022] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, which together with the following detailed description, serve to explain the present disclosure. In the drawings:

[0024] Figure 1 is a structural schematic diagram of a shell of a single battery according to an embodiment of the present disclosure.

[0025] Figure 2 is a structural schematic diagram of a shell of a single battery according to an embodiment of the present disclosure.

[0026] Figure 3 is a structural schematic diagram of a battery assembly according to an embodiment of the present disclosure.

[0027] Figure 4 is a structural schematic diagram of a liquid inlet assembly according to an embodiment of the present disclosure.

[0028] Figure 5 is a structural schematic diagram of a liquid outlet assembly according to an embodiment of the present disclosure.

[0029] Figure 6 is a structural schematic diagram of a shell of a single battery according to an embodiment of the present disclosure.

[0030] Figure 7 is a connection schematic diagram of a single battery, a liquid inlet assembly and a liquid outlet assembly according to an embodiment of the present disclosure.

[0031] Figure 8 is a structural schematic diagram of a reinforcing portion near one end of a liquid inlet according to an embodiment of the present disclosure.

[0032] Figure 9 is a structural schematic diagram of a reinforcing portion near one end of a liquid outlet according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0034] In the present disclosure, the orientation words such as "up, down, left, right" are generally defined based on the drawing surface direction of the corresponding drawing, and "inner, outer" refers to the inner and outer of the corresponding component profile, unless otherwise stated.

[0035] As shown in Figures 1 to 9 The present disclosure provides technical solutions of a shell, a single battery, a battery assembly using the single battery, and an electric device using the battery assembly or the single battery. Among them, a plurality of single batteries are placed in the electric device in series or parallel.

[0036] In order to clearly understand the technical solutions of the present disclosure, the present disclosure is described by the following specific embodiments. However, it is not limited to these specific embodiments, and the features in each embodiment can continue to be combined or replaced.

[0037] In one optional embodiment, the present disclosure provides a shell 00 for a single battery 10, which has a receiving cavity 01 for receiving a pole core 11 of the single battery 10, the pole core 11 being a laminated structure or a wound structure, at least one side wall of the shell 00 forming a cavity 02, the cavity 02 forming a flow channel 03 for flowing and containing cooling liquid, the flow channel 03 penetrating the shell 00 along a first direction, the shell 00 being provided with an inlet 04 and an outlet 05 at both ends along the first direction, respectively for the inflow and outflow of the cooling liquid, the cooling liquid flowing in from the inlet 04, flowing in the flow channel 03, and flowing out through the outlet 05. This integrated flow channel 03 and single battery 10 design allows the cooling liquid to flow directly in the flow channel 03 of the shell 00 of the single battery 10, eliminating the design of the traditional cold plate, and eliminating the need for adhesive heat conduction between the cold plate and the single battery 10, reducing the thermal resistance between the cooling liquid and the single battery 10, and greatly improving the heat exchange efficiency. The design of the flow channel 03 penetrating the shell 00 simplifies the structure and facilitates communication with the external medium source.

[0038] In a specific embodiment, as Figure 1As shown, the shell 00 comprises a shell body 06, the shell body 06 comprises a shell body 061 and at least one cover plate 062, the shell body 061 comprises two first side walls 0611 oppositely arranged in the second direction and two second side walls 0612 oppositely arranged in the third direction, the area of the first side wall 0611 is larger than the area of the second side wall 0612, one of the second side walls 0612 forms a cavity 02, the cavity 02 forms a flow channel 03, the flow channel 03 is arranged in the cavity 02 formed by one of the second side walls 0612, the cooling liquid flows in the flow channel 03, the flow channel 03 arranged in the second side wall 0612 does not occupy the thickness space of the single battery 10, and the energy density of the battery assembly is improved; the flow channel 03 penetrates the shell 00 along the first direction, and the shell 00 is provided with a liquid inlet 04 and a liquid outlet 05 at both ends along the first direction, respectively used for inflow and outflow of the cooling liquid, the cooling liquid flows in from the liquid inlet 04, flows in the flow channel 03, and flows out through the liquid outlet 05, and the integrated manner of the flow channel 03 and the single battery 10 makes the cooling liquid flow directly in the flow channel 03 under the single battery 10, greatly improving the heat exchange efficiency.

[0039] In an optional embodiment, the shell 00 comprises a shell body 06 and a connecting part 07, at least one end of the shell body 06 is connected with the connecting part 07 along the first direction, when the single battery 10 forms the battery assembly 20, the battery assembly 20 comprises a liquid inlet assembly 21 and a liquid outlet assembly 22, the liquid inlet assembly 21 is used for inflow of the cooling liquid into the battery assembly 20, the liquid outlet assembly 22 is used for outflow of the cooling liquid from the battery assembly 20, the connecting part 07 is used for connecting the flow channel 03 of the single battery 10 with the liquid inlet assembly 21 and connecting the flow channel 03 of the single battery 10 with the liquid outlet assembly 22, the connecting part 07 protrudes from the end face of the shell body 06, the design of the shell body 06 protruding from the connecting part 07 can more conveniently promote the connection of the flow channel 03 with the liquid inlet assembly 21 and the liquid outlet assembly 22, and the flow channel 03 penetrates the connecting part 07, so that the cooling liquid can more conveniently flow into the flow channel 03 through the connecting part 07 to cool the single battery 10.

[0040] In a specific embodiment, as shown in the drawings, Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7As shown, the shell 00 includes a housing 06 and a connecting portion 07, the housing 06 is connected with the connecting portion 07 at both ends in the first direction, the connecting portion 07 at both ends of the housing 06 protrudes from the end face of the housing 06, the flow channel 03 penetrates the connecting portion 07, and the connecting portion 07 at both ends is respectively provided with the liquid inlet 04 and the liquid outlet 05; after a plurality of single batteries 10 form a battery assembly 20, the battery assembly 20 includes a liquid inlet assembly 21 and a liquid outlet assembly 22, the liquid inlet assembly 21 is used for the cooling liquid to flow into the battery assembly 20, the liquid outlet assembly 22 is used for the cooling liquid to flow out of the battery assembly 20, the liquid inlet assembly 21 includes a shunt 210, the shunt 210 is internally provided with a shunt flow channel 2101, the shunt flow channel 2101 is used for the cooling liquid to flow through each single battery 10 after flowing into the battery assembly 20, the liquid outlet assembly 22 includes a flow collector 220, the flow collector 220 is internally provided with a flow collection channel 2201, the flow collection channel 2201 is used for the cooling liquid to flow out of the battery assembly 20 after flowing through each single battery 10, the shunt 210 is provided with a plurality of shunt ports 2102, the shunt port 2102 and the connecting portion 07 provided with the liquid inlet 04 are one-to-one correspondence and in communication, the connecting portion 07 provided with the liquid inlet 04 is used for the flow channel 03 of each single battery 10 to flow into the cooling liquid, the flow collector 220 is provided with a plurality of flow collection ports 2202, the flow collection port 2202 and the connecting portion 07 provided with the liquid outlet 05 are one-to-one correspondence and in communication, the connecting portion 07 provided with the liquid outlet 05 is used for the flow channel 03 of each single battery 10 to flow out of the cooling liquid after flowing through each single battery 10, the connecting portion 07 at both ends of the housing 06 protruding from the end face of the housing 06 is convenient for the flow channel 03 of the single battery 10 to connect with the liquid inlet assembly 21 and the liquid outlet assembly 22. In other specific embodiments, as shown in Figure 6 As shown, the housing 06 is connected with the connecting portion 07 at one end in the first direction, the connecting portion 07 protrudes from the end face of the housing 06, the flow channel 03 penetrates the connecting portion 07, the connecting portion 07 protruding from the end face of the housing 06 is provided with the liquid inlet 04 or the liquid outlet 05, as shown in Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown, the connecting portion 07 protruding from the end face of the housing 06 is provided with the liquid inlet 04, after a plurality of single batteries 10 form a battery assembly 20, the shunt port 2102 of the battery assembly 20 and the connecting portion 07 provided with the liquid inlet 04 are one-to-one correspondence and in communication, the flow collection port 2202 of the battery assembly 20 and the liquid outlet 05 provided in the first direction of the shell 00 are one-to-one correspondence and in communication, the housing 06 is provided with the connecting portion 07 protruding from the end face of the housing 06 at one end of the liquid inlet 04, which is more convenient for the flow channel 03 of the single battery 10 to connect with the liquid inlet assembly 21.

[0041] An optional embodiment, the distance between the end face of the connecting portion 07 away from the housing 06 and the end face of the housing 06 is less than 30mm, preventing the distance between the end face of the connecting portion 07 away from the housing 06 and the end face of the housing 06 from being too long to affect the sealing of the single battery 10.

[0042] In a specific embodiment, as shown in Figure 2 , In other specific embodiments, as shown in Figure 6 , In other specific embodiments, as shown in ,

[0043] In an optional embodiment, at least one end of the flow channel 03 is provided with a reinforcing portion 031 in the first direction. The reinforcing portion 031 extends in the first direction. The reinforcing portion 031 can have a rectangular, diamond, circular, spiral, or other shape that can enhance heat exchange. The reinforcing portion 031 is designed to increase the heat exchange area of the flow channel 03 and the cooling liquid, thereby enhancing the heat exchange capacity of the cooling liquid.

[0044] In a specific embodiment, as shown in Figure 2 , Figure 3 , Figure 7 , Figure 8As shown, the shell 00 includes a shell body 06 and a connecting portion 07, the connecting portion 07 is connected to both ends of the shell body 06 along the first direction, the connecting portion 07 at both ends of the shell body 06 protrudes from the end face of the shell body 06, the flow channel 03 penetrates the connecting portion 07, and the connecting portion 07 at both ends is respectively provided with a liquid inlet 04 and a liquid outlet 05, and the connecting portion 07 at both ends of the shell body 06 protrudes from the end face of the shell body 06. The design facilitates the connection of the flow channel 03 of the single battery 10 with the liquid inlet assembly 21 and the liquid outlet assembly 22 in the battery assembly 20; the flow channel 03 at one end provided with the liquid inlet 04 is provided with a reinforcing portion 031, the reinforcing portion 031 extends along the first direction, and the end of the reinforcing portion 031 close to the liquid inlet 04 is flush with the liquid inlet 04. This design of the reinforcing portion 031 in the flow channel 03 corresponding to the pole area strengthens the heat exchange capacity of the pole side corresponding to the liquid inlet 04; the shape of the reinforcing portion 031 is rectangular, and the length of the reinforcing portion 031 along the first direction from the length starting position of the liquid inlet 04 is less than or equal to one fourth of the length of the shell 00. Because the heat generation of the pole side of the pole core 11 is high, the length of the reinforcing portion 031 ensures that the reinforcing portion 031 is only arranged in the flow channel 03 corresponding to the area with high heat generation of the pole core 11, thereby saving costs. In other specific embodiments, the length of the reinforcing portion 031 along the first direction from the length starting position of the liquid inlet 04 can be consistent with the length of the shell 00. This length design further improves the overall heat exchange capacity of the single battery 10.

[0045] In an optional embodiment, both ends of the flow channel 03 are provided with a reinforcing portion 031 along the first direction. The shape of the reinforcing portion 031 can be rectangular, diamond, circular, spiral, or other shapes that can enhance heat exchange. The design of the reinforcing portion 031 at both ends of the flow channel 03 further increases the heat exchange area of the flow channel 03 and the cooling liquid, and further strengthens the heat exchange capacity of the cooling liquid.

[0046] In specific embodiments, as shown in FIG. 1, Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9As shown, the shell 00 includes a shell 06 and a connecting portion 07, the connecting portion 07 is connected to both ends of the shell 06 along the first direction, the connecting portion 07 at both ends of the shell 06 protrudes from the end face of the shell 06, the flow channel 03 penetrates the connecting portion 07, and the connecting portion 07 at both ends is respectively provided with a liquid inlet 04 and a liquid outlet 05, and the connecting portion 07 at both ends of the shell 06 protrudes from the end face of the shell 06. The design facilitates the connection of the flow channel 03 of the single battery 10 with the liquid inlet assembly 21 and the liquid outlet assembly 22 in the battery assembly 20; the connecting portion 07 at both ends protruding from the end face of the shell 06 is provided with a reinforcing portion 031, the reinforcing portion 031 extends along the first direction, one end of the reinforcing portion 031 close to the liquid inlet 04 is flush with the liquid inlet 04, and the other end of the reinforcing portion 031 close to the liquid outlet 05 is flush with the liquid outlet 05. The design of the reinforcing portion 031 in the flow channel 03 corresponding to the pole area on both sides strengthens the heat exchange capacity of the pole side corresponding to the liquid inlet 04 and the liquid outlet 05; the shape of the reinforcing portion 031 at both ends is rectangular, and the length of the reinforcing portion 031 close to the liquid inlet 04 along the first direction is less than or equal to one fourth of the length of the shell 00, and the length of the reinforcing portion 031 close to the liquid outlet 05 along the first direction is less than or equal to one fourth of the length of the shell 00. Because the pole side of the pole core 11 generates more heat, the length design of the reinforcing portion 031 ensures that the reinforcing portion 031 is only arranged in the flow channel 03 corresponding to the area where the pole core 11 generates more heat, thereby saving costs. In other specific embodiments, the length of the reinforcing portion 031 along the first direction can be consistent with the length of the shell 00, and the length design further improves the overall heat exchange capacity of the single battery 10.

[0047] One optional embodiment, wherein one end of the reinforcing portion 031 close to the liquid inlet 04 is flush with the liquid inlet 04, and the other end of the reinforcing portion 031 close to the liquid outlet 05 is flush with the liquid outlet 05. Because the pole side of the pole core 11 generates more heat, the design of the starting position of the reinforcing portion 031 ensures that the heat exchange capacity is enhanced at the position where the pole core 11 generates more heat, and at the same time, the design of the starting position of the reinforcing portion 031 also ensures that the reinforcing portion 031 is located in the flow channel 03 without protruding from the flow channel 03, thereby making the assembly of the single battery 10 more convenient.

[0048] In specific embodiments, as Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9As shown, the shell 00 comprises a shell body 06 and connecting portions 07, the connecting portions 07 are connected to both ends of the shell body 06 along the first direction, the connecting portions 07 at both ends of the shell body 06 protrude from the end face of the shell body 06, the flow channel 03 penetrates the connecting portions 07, and the connecting portions 07 at both ends are respectively provided with the liquid inlet 04 and the liquid outlet 05, the connecting portions 07 at both ends of the shell body 06 protrude from the end face of the shell body 06, which facilitates the connection of the flow channel 03 of the single battery 10 with the liquid inlet assembly 21 and the liquid outlet assembly 22 in the battery assembly 20; the connecting portions 07 at both ends protruding from the end face of the shell body 06 are each provided with a reinforcing portion 031, the reinforcing portion 031 extends along the first direction, one end of the reinforcing portion 031 close to the liquid inlet 04 is flush with the liquid inlet 04, and the other end of the reinforcing portion 031 close to the liquid outlet 05 is flush with the liquid outlet 05, because the heat generation of the pole core 11 is higher at the pole side, the design of the starting position of the reinforcing portion 031 ensures that the heat exchange capacity is enhanced at the position where the pole core 11 generates more heat, and at the same time, the design of the starting position of the reinforcing portion 031 also ensures that the reinforcing portion 031 is located in the flow channel 03 without protruding from the flow channel 03, so that the assembly of the single battery 10 is more convenient.

[0049] In an optional embodiment, along the first direction, the length of the reinforcing portion 031 is less than or equal to one fourth of the length of the shell 00, wherein one end of the reinforcing portion 031 close to the liquid inlet 04 is flush with the liquid inlet 04, and the other end of the reinforcing portion 031 close to the liquid outlet 05 is flush with the liquid outlet 05, because the heat generation of the pole core 11 is higher at the pole side, the design of the length of the reinforcing portion 031 ensures that the reinforcing portion 031 is only provided in the flow channel 03 corresponding to the area where the pole core 11 generates more heat, thereby saving cost.

[0050] In a specific embodiment, as shown in Figure 2 、 Figure 3 、 Figure 7 、 Figure 8 、 Figure 9As shown, the shell 00 comprises a shell body 06 and a connecting part 07, the connecting part 07 is connected to both ends of the shell body 06 along the first direction, the connecting part 07 at both ends of the shell body 06 protrudes from the end face of the shell body 06, the flow channel 03 penetrates the connecting part 07, and the connecting part 07 at both ends is respectively provided with a liquid inlet 04 and a liquid outlet 05, and the connecting part 07 at both ends of the shell body 06 protrudes from the end face of the shell body 06, which facilitates the connection of the flow channel 03 of the single battery 10 with the liquid inlet assembly 21 and the liquid outlet assembly 22 in the battery assembly 20; the connecting part 07 at both ends protruding from the end face of the shell body 06 is provided with a reinforcing part 031, the reinforcing part 031 extends along the first direction, one end of the reinforcing part 031 close to the liquid inlet 04 is flush with the liquid inlet 04, and the other end of the reinforcing part 031 close to the liquid outlet 05 is flush with the liquid outlet 05, the length of the reinforcing part 031 close to the liquid inlet 04 along the first direction is less than or equal to one fourth of the length of the shell 00, and the length of the reinforcing part 031 close to the liquid outlet 05 along the first direction is less than or equal to one fourth of the length of the shell 00, because the heat generation of the pole core 11 at the pole side is high, the length of the reinforcing part 031 ensures that the reinforcing part 031 is arranged in the flow channel 03 corresponding to the area with high heat generation of the pole core 11 at both sides, thereby saving cost.

[0051] In an optional embodiment, the number of reinforcing parts 031 is multiple, and the multiple reinforcing parts 031 can further improve the heat exchange capacity of the pole side, the multiple reinforcing parts 031 are arranged at intervals along the second direction and separate the flow channel 03 into multiple sub-flow channels 032, the multiple sub-flow channels 032 are used for the flow of the cooling liquid, and the first direction and the second direction intersect.

[0052] In a specific embodiment, as shown in Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9As shown, the shell 00 includes a shell body 06 and a connecting portion 07, the connecting portion 07 is connected to both ends of the shell body 06 along the first direction, the connecting portion 07 of both ends of the shell body 06 protrudes from the end face of the shell body 06, the flow channel 03 penetrates the connecting portion 07, and the connecting portion 07 at both ends is respectively provided with a liquid inlet 04 and a liquid outlet 05, and the connecting portion 07 at both ends of the shell body 06 protrudes from the end face of the shell body 06. The design facilitates the connection of the flow channel 03 of the single battery 10 with the liquid inlet assembly 21 and the liquid outlet assembly 22 in the battery assembly 20; the connecting portion 07 at both ends protruding from the end face of the shell body 06 is provided with a reinforcing portion 031, the reinforcing portion 031 extends along the first direction, the shape of the reinforcing portion 031 is rectangular, the number of reinforcing portions 031 at both ends is multiple, and the design of multiple reinforcing portions 031 is more conducive to improving the heat exchange capacity of the pole side; multiple reinforcing portions 031 are arranged in the second direction and form multiple sub-flow channels 032 by spacing the flow channel 03, the multiple sub-flow channels 032 are used for the flow of the cooling liquid, further increasing the heat exchange area with the cooling liquid, and the first direction and the second direction intersect; one end of the multiple reinforcing portions 031 close to the liquid inlet 04 is flush with the liquid inlet 04, and the other end of the multiple reinforcing portions 031 close to the liquid outlet 05 is flush with the liquid outlet 05. Taking the liquid inlet 04 as the length starting position, the length of the multiple reinforcing portions 031 close to the liquid inlet 04 along the first direction is less than or equal to one fourth of the length of the shell 00, and taking the liquid outlet 05 as the length starting position, the length of the multiple reinforcing portions 031 close to the liquid outlet 05 along the first direction is less than or equal to one fourth of the length of the shell 00. The length design of the multiple reinforcing portions 031 not only further improves the heat exchange capacity of the pole side, but also ensures that multiple reinforcing portions 031 are arranged in the flow channel 03 corresponding to the region with large heat generation of the pole core 11 on both sides, thereby saving costs.

[0053] In an optional embodiment, the shell 00 includes a shell body 06, the shell body 06 includes a shell body 061 and at least one cover plate 062, the cover plate 062 is arranged on the end of the shell body 061 along the first direction to form a containing cavity 01, the containing cavity 01 is used for containing the pole core 11 of the single battery 10, and the cover plate 062 is used for packaging and fixing the pole core 11; at least one side wall of the shell body 061 is formed with a cavity 02 to construct a flow channel 03, both ends of the cavity 02 penetrate at least one side wall along the first direction to construct a liquid inlet 04 and a liquid outlet 05, and the cavity 02 is used for forming the flow channel 03, so that the shell body 06 itself is provided with the flow channel 03, thereby simplifying the design of the shell body 06.

[0054] In a specific embodiment, as Figure 2 , Figure 3As shown, the shell 06 is sized according to the size of the pole core 11, the pole core 11 is loaded into the shell 06, the length of the shell 06 needs to completely cover the length of the pole core 11, and two cover plates 062 are respectively arranged on the end portions of the shell body 061 along the first direction to form a containing cavity 01 containing the pole core 11; the shell body 061 includes two first side walls 0611 oppositely arranged in the second direction and two second side walls 0612 oppositely arranged in the third direction, the area of the first side wall 0611 is larger than the area of the second side wall 0612, one of the second side walls 0612 forms a cavity 02, the cavity 02 forms a flow channel 03, the flow channel 03 is arranged in the cavity 02 formed by one of the second side walls 0612, the cooling liquid flows in the flow channel 03, the flow channel 03 arranged in the second side wall 0612 does not occupy the thickness space of the single battery 10, and the energy density of the battery assembly 20 is improved; the flow channel 03 penetrates the outer shell 00 along the first direction, the outer shell 00 is provided with a liquid inlet 04 and a liquid outlet 05 at both ends along the first direction, respectively used for inflow and outflow of the cooling liquid, the cooling liquid flows into the flow channel 03 from the liquid inlet 04, flows in the flow channel 03, and flows out through the liquid outlet 05, and the integrated manner of the flow channel 03 and the single battery 10 makes the cooling liquid flow directly in the flow channel 03 under the single battery 10, greatly improving the heat exchange efficiency.

[0055] In an optional embodiment, the shell body 061 includes two first side walls 0611 oppositely arranged in the second direction and two second side walls 0612 oppositely arranged in the third direction, and the area of the first side wall 0611 is larger than the area of the second side wall 0612; the flow channel 03 is arranged in at least one of the two second side walls 0612, the first direction, the second direction and the third direction are respectively two by two intersected, and the flow channel 03 arranged in the second side wall 0612 does not occupy the thickness space of the single battery 10, and the energy density of the battery assembly 20 is improved.

[0056] In a specific embodiment, as shown, Figure 7 the shell body 061 includes two first side walls 0611 oppositely arranged in the second direction and two second side walls 0612 oppositely arranged in the third direction, and the area of the first side wall 0611 is larger than the area of the second side wall 0612, one of the second side walls 0612 forms a cavity 02, the cavity 02 forms a flow channel 03, the flow channel 03 is arranged in the cavity 02 formed by one of the second side walls 0612, the cooling liquid flows in the flow channel 03, and the first direction, the second direction and the third direction are respectively two by two intersected; the flow channel 03 penetrates the outer shell 00 along the first direction, the outer shell 00 is provided with a liquid inlet 04 and a liquid outlet 05 at both ends along the first direction, respectively used for inflow and outflow of the cooling liquid, the cooling liquid flows into the flow channel 03 from the liquid inlet 04, flows in the flow channel 03, and flows out through the liquid outlet 05, completing the cooling of the single battery 10 by the cooling liquid, the flow channel 03 arranged in the second side wall 0612 does not occupy the thickness space of the single battery 10, and the energy density of the battery assembly 20 is improved.

[0057] In an optional embodiment, the monomer battery 10 provided by the present disclosure comprises a pole core 11 and a shell 00 provided by the present disclosure, the shell 00 comprises a shell body 06, the shell body 06 comprises a shell body 061 and at least one cover plate 062, the cover plate 062 is arranged on the end of the shell body 061 along the first direction to form a containing cavity 01, the containing cavity 01 is used for containing the pole core 11, and the cover plate 062 is used for sealing the pole core 11 in the monomer battery 10.

[0058] In a specific embodiment, as shown in Figure 8 the shell 00 comprises a shell body 06, the shell body 06 comprises a shell body 061 and two cover plates 062, the size of the shell body 06 is designed according to the size of the pole core 11, the pole core 11 is arranged in the shell body 06, the length of the shell body 06 needs to completely cover the length of the pole core 11, and the two cover plates 062 are arranged on the ends of the shell body 061 along the first direction to form a containing cavity 01 containing the pole core, and the cover plate 062 is used for packaging and fixing the pole core 11.

[0059] In an optional embodiment, the battery assembly 20 provided by the present disclosure comprises a liquid inlet assembly 21, a liquid outlet assembly 22 and a monomer battery 10 provided by the present disclosure, the liquid inlet assembly 21 is used for flowing the cooling liquid into the battery assembly 20, the liquid outlet assembly 22 is used for flowing the cooling liquid out of the battery assembly 20, the liquid inlet 04 of the flow channel 03 of the plurality of monomer batteries 10 is communicated with the liquid inlet assembly 21, after the cooling liquid flows into the battery assembly 20, the cooling liquid flows into the monomer battery 10 through the liquid inlet 04 of each monomer battery 10 to cool the monomer battery 10, the liquid outlet 05 of the flow channel 03 of the plurality of monomer batteries 10 is communicated with the liquid outlet assembly 22, after the cooling of the monomer battery 10 is completed, the cooling liquid flows to the liquid outlet assembly 22 through the liquid outlet 05 of the monomer battery 10, and then flows out of the battery assembly 20 through the liquid outlet assembly 22.

[0060] In a specific embodiment, as shown in Figure 9 , Figure 1 , Figure 3 , Figure 1As shown, the liquid inlet assembly 21 comprises a distribution member 210 and a liquid inlet member 211, the liquid outlet assembly 22 comprises a collection member 220 and a liquid outlet member 221, the liquid inlet member 211 is used for the cooling liquid to flow into the battery assembly 20, the liquid outlet member 221 is used for the cooling liquid to flow out of the battery assembly 20, the distribution member 210 is used for the cooling liquid to flow in the battery assembly 20 after flowing into the battery assembly 20, and the collection member 220 is used for the cooling liquid to flow in the battery assembly 20 after flowing out of the single battery 10; the design of the liquid inlet assembly 21 and the liquid outlet assembly 22 facilitates the flow of the cooling liquid into, out of and in the battery assembly 20; the liquid inlet assembly 21 comprises the distribution member 210, the distribution member 210 is provided with a plurality of distribution ports 2102, the distribution ports 2102 are connected with the liquid inlet ports 04 of the flow channels 03 of the single batteries 10, after the cooling liquid flows into the battery assembly 20 from the liquid inlet member 211, the cooling liquid flows in the distribution member 210, and then flows into the single batteries 10 through the distribution ports 2102; the liquid outlet assembly 22 comprises the collection member 220, the collection member 220 is provided with a plurality of collection ports 2202, the collection ports 2202 are connected with the liquid outlet ports 05 of the flow channels 03 of the single batteries 10, after the cooling liquid flows out of the single batteries 10 from the liquid outlet ports 05, the cooling liquid flows into the battery assembly 20 through the collection ports 2202, and then flows in the collection member 220 of the battery assembly 20, and finally flows out of the battery assembly 20 through the liquid outlet member 221. The liquid inlet ports 04 of the flow channels 03 of the single batteries 10 are communicated with the liquid inlet assembly 21 to ensure that the cooling liquid can flow into each single battery 10 after flowing into the battery assembly 20, and the liquid outlet ports 05 of the flow channels 03 of the single batteries 10 are communicated with the liquid outlet assembly 22 to ensure that the cooling liquid can flow into the battery assembly 10 after flowing out of each single battery 10, and the connection is more convenient.

[0061] In an optional embodiment, the liquid inlet assembly 21 comprises the distribution member 210, and the liquid outlet assembly 22 comprises the collection member 220, the distribution member 210 is internally provided with a distribution flow channel 2101, the collection member 220 is internally provided with a collection flow channel 2201, the distribution member 210 is used for the cooling liquid to flow in the distribution flow channel 2101 after flowing into the battery assembly 20, and the collection member 220 is used for the cooling liquid to flow in the collection flow channel 2201 after flowing out of the single battery 10 and flowing into the battery assembly 20, the distribution member 210, the distribution flow channel 2101, the collection member 220 and the collection flow channel 2201 facilitate the flow of the cooling liquid into, out of and in the battery assembly 20; the distribution member 210 is provided with a plurality of distribution ports 2102, the collection member 220 is provided with a plurality of collection ports 2202, the distribution ports 2102 and the liquid inlet ports 04 are in one-to-one correspondence and communication, and the collection ports 2202 and the liquid outlet ports 05 are in one-to-one correspondence and communication, and the one-to-one correspondence and communication facilitate the cooling liquid to flow into each single battery 10 and flow out of each single battery 10.

[0062] In a specific embodiment, as shown in Figure 1 , Figure 3 , Figure 4 , Figure 5、 Figure 7 As shown, the liquid inlet assembly 21 comprises a flow distribution member 210, the flow distribution member 210 is internally provided with a flow distribution channel 2101, the flow distribution member 210 is provided with a plurality of flow distribution ports 2102, the liquid outlet assembly 22 comprises a flow collection member 220, the flow collection member 220 is internally provided with a flow collection channel 2201, the flow collection member 220 is provided with a plurality of flow collection ports 2202; the single battery cell 10 comprises a pole core 11 and a shell 00 provided by the present disclosure, the shell 00 comprises a shell body 061, the shell body 061 comprises two first side walls 0611 oppositely arranged in a second direction and two second side walls 0612 oppositely arranged in a third direction, the area of the first side wall 0611 is larger than the area of the second side wall 0612, one of the second side walls 0612 forms a cavity 02, the cavity 02 forms a flow channel 03, the flow channel 03 is arranged in the cavity 02 formed by one of the second side walls 0612, for the circulation of the cooling liquid in the flow channel 03, the flow channel 03 penetrates through the shell 00 along the first direction, the two ends of the shell 00 along the first direction are provided with a liquid inlet 04 and a liquid outlet 05, respectively, for the inflow and outflow of the cooling liquid, the liquid inlet 04 of the flow channel 03 of the single battery cell 10 and the flow distribution port 2102 correspond one by one, the liquid outlet 05 of the flow channel 03 of the single battery cell 10 and the flow collection port 2202 correspond one by one, the cooling liquid flows in the battery assembly 10, flows in the flow distribution channel 2101, flows into the single battery cell 10 through the flow distribution port 2102, flows in the flow channel 03 of the single battery cell 10, and then flows out of the single battery cell 10 through the liquid outlet 05, and then flows into the battery assembly 20 through the flow collection port 2202, forming a loop, this connection mode can cool each single battery cell 10, and the connection mode is also relatively simple.

[0063] In an optional embodiment, the liquid inlet assembly 21 further comprises a liquid inlet member 211, the liquid inlet member 211 is used for the cooling liquid to flow into the battery assembly 20, the liquid outlet assembly 22 further comprises a liquid outlet member 221, the liquid outlet member 221 is used for the cooling liquid to flow out of the battery assembly 20, the liquid inlet member 211 is connected with the flow distribution member 210 at an angle, and / or the liquid outlet member 221 is connected with the flow collection member 220 at an angle, the angle connection of the liquid inlet member 211 with the flow distribution member 210 and / or the angle connection of the liquid outlet member 221 with the flow collection member 220 can avoid increasing the space in the battery assembly 20; the liquid inlet member 211 is provided with a liquid inlet connector 2110, the liquid outlet member 221 is provided with a liquid outlet connector 2210, the cooling liquid flows into the liquid inlet member 211 from the liquid inlet connector 2110, and the cooling liquid flows out of the battery assembly 20 from the liquid outlet connector 2210, the arrangement of the liquid inlet member 211 and the liquid outlet member 221 makes it more convenient for the cooling liquid to flow into and out of the battery assembly 20.

[0064] In a specific embodiment, as shown in the drawings, Figure 1 , Figure 3 , Figure 4 , Figure 5As shown, the liquid inlet assembly 21 comprises a flow dividing member 210 and a liquid inlet member 211, the liquid outlet assembly 22 comprises a flow converging member 220 and a liquid outlet member 221, the liquid inlet member 211 is used for the cooling liquid to flow into the battery assembly 20, the liquid outlet member 221 is used for the cooling liquid to flow out of the battery assembly 20, the liquid inlet member 211 is provided with a liquid inlet joint 2110, the liquid outlet member 221 is provided with a liquid outlet joint 2210, the cooling liquid flows into the liquid inlet member 211 from the liquid inlet joint 2110, the flow dividing member 210 is used for the cooling liquid to flow through the battery assembly 20 after flowing into the battery assembly 20, the flow converging member 220 is used for the cooling liquid to flow through the battery assembly 20 after flowing out of the monomer battery 10, the cooling liquid flows out of the battery assembly 20 through the liquid outlet joint 2210 finally after flowing into the liquid outlet member 221; the liquid inlet member 211 is connected with the flow dividing member 210 at a certain angle, the liquid outlet member 221 is also connected with the flow converging member 220 at a certain angle, the angle connection is to reduce the internal space of the battery assembly 20, in other embodiments, the angle between the liquid inlet member 211 and the flow dividing member 210 can be 0 degree, and / or the angle between the liquid outlet member 221 and the flow converging member 220 can be 0 degree; the design of the liquid inlet member 211 and the liquid outlet member 221 is more convenient for the cooling liquid to flow into, flow out and flow through the battery assembly 20.

[0065] In an optional embodiment, the shell 00 comprises a shell body 06 and a connecting part 07, the shell body 06 is used for accommodating the pole core 11 of the monomer battery 10, along the first direction, the two ends of the shell body 06 are connected with the connecting part 07, the connecting part 07 protrudes from the end face of the shell body 06, when the monomer battery 10 forms the battery assembly 20, the battery assembly 20 comprises a liquid inlet assembly 21 and a liquid outlet assembly 22, the liquid inlet assembly 21 is used for the cooling liquid to flow into the battery assembly 20, the liquid outlet assembly 22 is used for the cooling liquid to flow out of the battery assembly 20, the connecting part 07 at one end of the shell body 06 is used for connecting the flow channel 03 of the monomer battery 10 with the liquid inlet assembly 21, the connecting part 07 at the other end of the shell body 06 is used for connecting the flow channel 03 of the monomer battery 10 with the liquid outlet assembly 22, the connecting part 07 is convenient for the connection of the flow channel 03 of the monomer battery 10 with the liquid inlet assembly 21 and the liquid outlet assembly 22; the flow channel 03 penetrates through the connecting part 07, the two connecting parts 07 are respectively provided with a liquid inlet port 04 and a liquid outlet port 05, a plurality of flow dividing ports 2102 are respectively provided with a flow dividing pipe 2103, a plurality of flow converging ports 2202 are respectively provided with a flow converging pipe 2203, the flow dividing pipe 2103 is connected with the connecting part 07 one by one to make the flow dividing port 2102 and the liquid inlet port 04 communicate one by one, the flow converging pipe 2203 is connected with the connecting part 07 one by one to make the flow converging port 2202 and the liquid outlet port 05 communicate one by one, the setting of the flow dividing pipe 2103 makes the connection of the flow dividing port 2102 and the liquid inlet port 04 more accurate, the setting of the flow converging pipe 2203 makes the connection of the flow converging port 2202 and the liquid outlet port 05 more accurate.

[0066] In a specific embodiment, as shown in FIG. 1, Figure 7 , Figure 3 , Figure 4、 Figure 5 、 Figure 7 As shown in FIG. 1, the shell 00 includes a casing 06 and a connecting part 07, the casing 06 includes a casing body 061 for accommodating the pole core 11 of the single battery 10 and two cover plates 062 for encapsulating and fixing the pole core 11, and the casing 06 is connected with the connecting part 07 at both ends in the first direction, the connecting part 07 at both ends of the casing 06 protrudes from the end face of the casing 06, the connecting part 07 is arranged to facilitate the flow of the cooling liquid from the liquid inlet assembly 21 into the single battery 10 and the flow of the cooling liquid from the single battery 10 into the liquid outlet assembly 22 after flowing through the single battery 10, the distance between the connecting part 07 at both ends of the casing 06 away from the end face of the casing 06 and the end face of the casing 06 is less than 30 mm, so as to prevent the distance between the connecting part 07 at both ends of the casing 06 away from the end face of the casing 06 and the end face of the casing 06 from being too long to affect the sealing of the single battery 10, the liquid inlet assembly 21 includes a flow dividing piece 210, the flow dividing piece 210 is provided with a plurality of flow dividing ports 2102, the flow dividing ports 2102 are provided with flow dividing pipes 2103, the liquid outlet assembly 22 includes a flow converging piece 220, the flow converging piece 220 is provided with a plurality of flow converging ports 2202, the flow converging ports 2202 are provided with flow converging pipes 2203, the two connecting parts 07 are respectively provided with a liquid inlet 04 and a liquid outlet 05, the flow dividing pipe 2103 is connected with the connecting part 07 having the liquid inlet 04 in a one-to-one correspondence to make the flow dividing port 2102 and the liquid inlet 04 communicate in a one-to-one correspondence, the flow converging pipe 2203 is connected with the connecting part 07 having the liquid outlet 05 in a one-to-one correspondence to make the flow converging port 2202 and the liquid outlet 05 communicate in a one-to-one correspondence, the arrangement of the flow dividing pipe 2103 and the flow converging pipe 2203 can better promote the connection relationship between the flow dividing port 2102, the liquid inlet 04, the flow converging port 2202 and the liquid outlet 05, and ensure the circulation of the cooling liquid.

[0067] In an optional embodiment, the liquid inlet assembly 21 and the single battery 10 are insulatively connected, and / or the liquid outlet assembly 22 and the single battery 10 are insulatively connected, the insulative connection is arranged to prevent the liquid inlet assembly 21 or the liquid outlet assembly 22 from connecting the single battery 10 with other components in the battery assembly 20.

[0068] In a specific embodiment, as shown in FIG. 1, Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 Figure 7 Figure 3 Figure 4 Figure 5 Figure 7 As shown in FIG. 1, the liquid inlet assembly 21 and the liquid outlet assembly 22 are both made of metal material, and the liquid inlet assembly 21 and the liquid outlet assembly 22 are connected with the single battery 10 through insulating components; in other possible embodiments, the liquid inlet assembly 21 and the liquid outlet assembly 22 are both made of insulating material such as plastic, and the liquid inlet assembly 21 and the liquid outlet assembly 22 are directly connected with the single battery 10.

[0069] In addition, each embodiment of the present disclosure also provides a power consumption device using the single battery or using the battery assembly.

[0070] While example embodiments have been described herein with reference to the attached drawings, it is to be understood that the example embodiments are merely exemplary and that not all of the features and / or embodiments can be claimed under the applications. Those skilled in the art will readily devise many alternative embodiments, without departing from the scope and spirit of the applications. All such modifications and variations are intended to be included herein within the scope of the applications, as defined by the following claims.

[0071] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been described in detail in order not to obscure the understanding of this description.

[0072] Similarly, it is to be understood that the various features of the application can be used alone or in any combination depending on the embodiment of the application contemplated. It is therefore contemplated to combine features of the application in any manner deemed appropriate. Similarly, it is to be understood that, for brevity's sake, the description of the application has not been expanded into a detailed description of the various features of the application, and that the description of the application is not to be construed as reflecting an intent that the application is to be limited to only the features explicitly described in each claim.

[0073] Those skilled in the art will appreciate that all features described herein (including all accompanying claims, abstract and drawings), and / or any methods or processes described herein can be embodied in any combination of means unless otherwise explicitly stated. Each of the features disclosed in this specification (including the claims, abstract, and drawings) can be replaced by alternative features serving the same, equivalent or a similar purpose, unless expressly stated otherwise.

[0074] Furthermore, those skilled in the art will recognize that references in the specification to "one embodiment", "an embodiment", "an example embodiment", means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily referring to a single, "one embodiment".

[0075] It is noted that the foregoing examples have been presented by way of explanation of the applications, not limitation, and that various changes and modifications will be apparent to those skilled in the art in view of this detailed description.

Claims

1. A housing, characterized in that, A single battery, The shell has a receiving cavity for accommodating a pole core of the single battery, at least one side wall of the shell is provided with a flow channel penetrating through the shell along a first direction, and two ends of the shell along the first direction are provided with a liquid inlet and a liquid outlet.

2. The shell according to claim 1, wherein The shell comprises a shell body and a connecting part, at least one end of the shell body is connected with the connecting part along the first direction, the connecting part protrudes from the end face of the shell body, and the flow channel penetrates through the connecting part.

3. The shell according to claim 2, wherein The distance between the end face of the connecting part away from the shell body and the end face of the shell body is less than 30 mm.

4. The shell according to claim 1, wherein At least one end of the flow channel is provided with a reinforcing part along the first direction, and the reinforcing part extends along the first direction.

5. The housing of claim 4, wherein, Both ends of the flow channel are provided with the reinforcing part along the first direction.

6. The shell according to claim 5, wherein One end of the reinforcing part near the liquid inlet is flush with the liquid inlet, and one end of the reinforcing part near the liquid outlet is flush with the liquid outlet.

7. The shell according to claim 6, wherein The length of the reinforcing part along the first direction is less than or equal to one fourth of the length of the shell.

8. The shell according to claim 4, wherein The number of the reinforcing parts is multiple, the multiple reinforcing parts are arranged in a second direction to separate the flow channel into multiple sub-flow channels, and the first direction and the second direction intersect.

9. The shell according to any one of claims 1-8, wherein The shell comprises a shell body, the shell body comprises a shell body and at least one cover plate, the cover plate covers the end of the shell body along the first direction to form the receiving cavity, at least one side wall of the shell body is formed with a cavity to form the flow channel, and the two ends of the cavity along the first direction penetrate through the at least one side wall to form the liquid inlet and the liquid outlet.

10. The shell according to claim 9, wherein The shell body comprises two first side walls arranged oppositely in a second direction and two second side walls arranged oppositely in a third direction, the area of the first side wall is greater than the area of the second side wall, the flow channel is arranged in at least one of the two second side walls, and the first direction, the second direction and the third direction intersect with each other.

11. A single battery, comprising A pole core and the shell according to any one of claims 1-10, and the pole core is accommodated in the receiving cavity.

12. A battery assembly, comprising A liquid inlet assembly, a liquid outlet assembly and multiple single batteries according to claim 11, the liquid inlets of the flow channels of the multiple single batteries are in communication with the liquid inlet assembly respectively, and the liquid outlets of the flow channels of the multiple single batteries are in communication with the liquid outlet assembly respectively.

13. The battery assembly according to claim 12, wherein ​ The liquid inlet assembly comprises a flow dividing member, and the liquid outlet assembly comprises a flow converging member, the flow dividing member is internally provided with a flow dividing channel, the flow converging member is internally provided with a flow converging channel, the flow dividing member is provided with a plurality of flow dividing ports, the flow converging member is provided with a plurality of flow converging ports, the flow dividing ports and the liquid inlet ports are in one-to-one correspondence and in communication, and the flow converging ports and the liquid outlet ports are in one-to-one correspondence and in communication.

14. The battery assembly according to claim 13, characterized in that, The liquid inlet assembly further comprises a liquid inlet member, and the liquid outlet assembly further comprises a liquid outlet member, the liquid inlet member is angularly connected with the flow dividing member, and / or the liquid outlet member is angularly connected with the flow converging member, the liquid inlet member is provided with a liquid inlet connector, and the liquid outlet member is provided with a liquid outlet connector.

15. The battery assembly according to claim 13, characterized in that, The shell comprises a shell body and a connecting portion, along the first direction, the two ends of the shell body are connected with the connecting portions, the connecting portions protrude from the end faces of the shell body, the flow channel penetrates through the connecting portions, the two connecting portions are respectively provided with the liquid inlet port and the liquid outlet port, a plurality of flow dividing pipes are respectively arranged on the flow dividing ports, a plurality of flow converging pipes are respectively arranged on the flow converging ports, the flow dividing pipes are connected with the connecting portions in one-to-one correspondence to make the flow dividing ports and the liquid inlet ports in one-to-one correspondence and in communication, and the flow converging pipes are connected with the connecting portions in one-to-one correspondence to make the flow converging ports and the liquid outlet ports in one-to-one correspondence and in communication.

16. The battery assembly according to claim 12, characterized in that, The liquid inlet assembly and the single battery are insulated, and / or the liquid outlet assembly and the single battery are insulated.

17. An electrical device, comprising: The electric device comprises the single battery according to claim 11 or the battery assembly according to any one of claims 12-16.

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