Battery module and battery pack

Abstract

The utility model discloses a battery module discloses a battery pack, wherein the battery module includes a plurality of battery monomer and liquid cooling subassembly, a plurality of battery monomer arrange setting along the first direction, liquid cooling subassembly, including a plurality of liquid cooling board along the first direction arrangement, liquid cooling board includes connecting plate, first side plate and second side plate, first side plate and second side plate are opposite setting along the first direction, and connecting plate is connected between first side plate and second side plate, and connecting plate, first side plate and second side plate form the accommodation groove, and each accommodation groove contains the battery monomer, in the adjacent liquid cooling board, wherein the first side plate of one liquid cooling board and the second side plate of another liquid cooling board form the accommodation space, and each accommodation space contains the battery monomer, and thus, the quantity of liquid cooling board can be reduced to improve the assembly efficiency of battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery module and battery pack. Background Technology

[0002] A battery module consists of multiple battery cells and multiple liquid cooling plates. In order to improve the cooling effect of the battery cells, a liquid cooling plate is placed every other battery cell or every two battery cells. The large number of liquid cooling plates leads to a decrease in the assembly efficiency of the battery module. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery module that can reduce the number of liquid cooling plates, thereby improving the assembly efficiency of the battery module.

[0004] This utility model also proposes a battery pack that uses the above-mentioned battery module.

[0005] According to a first aspect embodiment of the present invention, the battery module has a first orientation, and the battery module includes: Multiple battery cells arranged along the first direction; A liquid cooling assembly includes a plurality of liquid cooling plates arranged along a first direction. Each liquid cooling plate includes a connecting plate, a first side plate, and a second side plate. The first side plate and the second side plate are disposed opposite to each other along the first direction. The connecting plate is connected between the first side plate and the second side plate. The connecting plate, the first side plate, and the second side plate form a receiving groove, and the receiving groove contains the battery cell. In adjacent liquid cooling plates, the first side plate of one liquid cooling plate and the second side plate of another liquid cooling plate form a receiving space, and the receiving space contains the battery cell.

[0006] The battery module according to the first aspect of the present invention has at least the following beneficial effects: When the battery module is working, the first and second side plates of each liquid cooling plate cool the battery cells located in the receiving groove and receiving space. It is not necessary to place a liquid cooling plate every other battery cell or every two battery cells, which can reduce the number of liquid cooling plates and improve the assembly efficiency of the battery module.

[0007] In some embodiments of this utility model, the receiving slot contains at least two of the battery cells, and / or the receiving space contains at least two of the battery cells.

[0008] In some embodiments of this utility model, the first side plate is provided with a first flow channel and an inlet communicating with the first flow channel, the second side plate is provided with a second flow channel and an outlet communicating with the second flow channel, and the connecting plate is provided with a third flow channel, through which the first flow channel communicates with the second flow channel.

[0009] In some embodiments of this utility model, the liquid cooling plate further includes an inlet plate and an outlet plate. The inlet plate is connected to the first side plate and has an inlet channel. The inlet channel is connected to the first channel through the inlet port. The outlet plate is connected to the second side plate and has an outlet channel. The outlet channel is connected to the second channel through the outlet port.

[0010] In some embodiments of this utility model, the liquid cooling assembly further includes multiple liquid inlet pipes, and the liquid inlet plates are respectively connected to first connectors communicating with the liquid inlet channels on both sides along the first direction. In two adjacent liquid cooling plates, the first connector of one of the first side plates is connected to the first connector of the other first side plate through the liquid inlet pipe; and / or, The liquid cooling assembly also includes multiple liquid outlet pipes. The liquid outlet plates are respectively connected to second connectors that communicate with the liquid outlet channels on both sides along the first direction. In two adjacent liquid cooling plates, the second connector of one second side plate is connected to the second connector of the other second side plate through the liquid outlet pipe.

[0011] In some embodiments of this utility model, the liquid inlet pipe includes a first rigid pipe and a first elastic pipe, the first elastic pipe being housed within the first rigid pipe, and in two adjacent liquid cooling plates, the first connector being inserted into the first elastic pipe and compressing the first elastic pipe to elastically deform; and / or, The liquid outlet pipe includes a second rigid pipe and a second elastic pipe. The second elastic pipe is housed inside the second rigid pipe and in two adjacent liquid cooling plates. The second connector is inserted into the second elastic pipe and compresses the second elastic pipe to deform elastically.

[0012] In some embodiments of this utility model, the battery module has a second direction perpendicular to the first direction, the liquid inlet plate is located on one side of the first side plate along the second direction, and the liquid outlet plate is located on the side of the second side plate opposite to the liquid inlet plate along the second direction.

[0013] In some embodiments of this utility model, the battery module has a third direction perpendicular to the first direction, the connecting plate is located on one side of the first side plate along the third direction, the first flow channel includes a plurality of first flow channel segments arranged along the third direction, and the liquid inlet communicates with the first flow channel segment furthest from the connecting plate; and / or, The second flow channel is configured with multiple second flow channel segments, each of which includes multiple second flow channel segments arranged along the third direction. The liquid outlet is connected to the second flow channel segment furthest from the connecting plate.

[0014] In some embodiments of this utility model, the battery module has a second direction and a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the liquid cooling plate further includes a sealing member disposed opposite to each other along the second direction, the connecting plate is located on one side of the first side plate along the third direction, the liquid cooling plate is provided with openings on both sides along the second direction, and the sealing member blocks the openings located on the same side; The first side plate is provided with a first flow channel, the first flow channel including a plurality of first flow channel segments arranged along the third direction and third flow channel segments arranged opposite to each other along the second direction, the third flow channel segments communicating with the openings located on the same side; and / or, The second side plate is provided with a second flow channel, the second flow channel including a plurality of second flow channel segments arranged along the third direction and a fourth flow channel segment arranged opposite to each other along the second direction, the fourth flow channel segment communicating with the opening located on the same side; and / or, The connecting plate is provided with a third flow channel, which includes a plurality of fifth flow channel segments arranged along the first direction and a sixth flow channel segment arranged opposite to each other along the second direction. The sixth flow channel segment is connected to the opening located on the same side.

[0015] According to a second aspect embodiment of the present invention, the battery pack includes a housing and the battery module described in the above embodiments, wherein the battery module is housed within the housing.

[0016] The battery pack according to the second aspect embodiment of the present invention has at least the following beneficial effects: When the battery module adopts the first aspect embodiment of the present invention is working, the first side plate and the second side plate of each liquid cooling plate cool the battery cells located in the receiving groove and receiving space. It is not necessary to place a liquid cooling plate every other battery cell or every two battery cells, which can reduce the number of liquid cooling plates and improve the assembly efficiency of the battery module.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the battery module structure according to an embodiment of the present invention; Figure 2 This is a top view of the battery module according to an embodiment of the present utility model; Figure 3 for Figure 2 Sectional view of line AA in the middle; Figure 4 This is a schematic diagram of the structure of the liquid cooling assembly according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a liquid cooling assembly according to another embodiment of the present invention; Figure 6 This is an assembly diagram of the liquid cooling plate, the first connector, and the second connector according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of the structure of the liquid cooling plate according to an embodiment of the present invention; Figure 8 This is an exploded view of the liquid cooling plate according to an embodiment of the present utility model; Figure 9 This is a schematic diagram of the structure of the inlet pipe or outlet pipe according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the internal structure of the inlet or outlet pipe in an embodiment of the present invention.

[0019] Figure label: Battery cell 100, buffer component 110; Liquid cooling plate 200, receiving tank 201, receiving aperture 202, opening 203, first side plate 210, first flow channel 211, second side plate 220, second flow channel 221, connecting plate 230, third flow channel 231, liquid inlet plate 240, liquid outlet plate 250, first connector 260, second connector 270; Liquid inlet pipe 300, first rigid pipe 310, first elastic pipe 320; Liquid outlet pipe 400, second rigid pipe 410, second elastic pipe 420; 500 sealing components. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] In related technologies, battery modules include multiple battery cells and multiple liquid cooling plates. In order to improve the cooling effect of battery cells, a liquid cooling plate is placed every other battery cell or every two battery cells. The large number of liquid cooling plates leads to a decrease in the assembly efficiency of the battery module.

[0026] Reference Figures 1 to 4 , Figure 1 This is a schematic diagram of the battery module structure according to an embodiment of the present invention. Figure 2 This is a top view of the battery module according to an embodiment of the present invention. Figure 3 for Figure 2 Sectional view of line AA in the middle. Figure 4This is a schematic diagram of the structure of the liquid cooling assembly according to an embodiment of the present invention. As shown in the figure, the first aspect of the present invention provides a battery module. The battery module has a first direction and includes a plurality of battery cells 100 and a liquid cooling assembly. The plurality of battery cells 100 are arranged along the first direction. The liquid cooling assembly includes a plurality of liquid cooling plates 200 arranged along the first direction. Each liquid cooling plate 200 includes a connecting plate 230, a first side plate 210, and a second side plate 220. The first side plate 210 and the second side plate 220 are arranged opposite to each other along the first direction. The connecting plate 230 is connected to the first side plate 220. Between the side plate 210 and the second side plate 220, the connecting plate 230, the first side plate 210 and the second side plate 220 form a receiving groove 201. Each receiving groove 201 contains a battery cell 100. In the adjacent liquid cooling plates 200, the first side plate 210 of one liquid cooling plate 200 and the second side plate 220 of the other liquid cooling plate 200 form a receiving space. Each receiving space contains a battery cell 100. In this way, the number of liquid cooling plates 200 can be reduced to improve the assembly efficiency of the battery module.

[0027] For example, the first side plate 210 and the second side plate 220 are integrated on the liquid cooling plate 200. When the battery module is working, the first side plate 210 and the second side plate 220 of each liquid cooling plate 200 cool the battery cells 100 located in the receiving groove 201 and the receiving space. It is not necessary to place a liquid cooling plate 200 every other battery cell 100 or every two battery cells 100, which can reduce the number of liquid cooling plates 200 and improve the assembly efficiency of the battery module.

[0028] It should be noted that the battery cell 100 is fixedly connected to the first side plate 210 or the second side plate 220 by adhesive bonding. The operation is simple, convenient and quick, and it is easy to install and fix the battery cell 100.

[0029] It is understandable that the battery cell 100 can be a hard-pack battery or a soft-pack battery.

[0030] like Figure 3 As shown, in this embodiment, the receiving groove 201 contains two battery cells 100, and the receiving space contains two battery cells 100. On the one hand, each battery cell 100 is in contact with the first side plate 210 or the second side plate 220, which can ensure that the multiple battery cells 100 are cooled evenly. On the other hand, it can reduce the number of liquid cooling plates 200, thereby improving the assembly efficiency of the battery module.

[0031] For example, the battery cell 100 has a first side perpendicular to the first direction, which is the surface with the largest area of ​​the battery cell 100. Each battery cell 100's first side contacts another first side or a second side, which can increase the heat exchange area of ​​each battery cell 100, improve the cooling effect of the battery cell 100, and ensure uniform cooling of multiple battery cells 100. Moreover, each liquid cooling plate 200 can cool three battery cells 100, which can reduce the number of liquid cooling plates 200.

[0032] As another implementation, two battery cells 100 are housed in the receiving groove 201, or the receiving space contains two battery cells 100, as long as the multiple battery cells 100 are cooled evenly, there is no limitation here.

[0033] In another embodiment, the receiving slot 201 contains one, three, or four battery cells 100, and the receiving space contains one, three, or four battery cells 100.

[0034] In this embodiment, the battery module further includes a buffer 110. The two battery cells 100 located in the receiving groove 201 are the first battery cell 100 and the second battery cell 100. The buffer 110 is sandwiched between the first battery cell 100 and the second battery cell 100. The two battery cells 100 located in the receiving space are the third battery cell 100 and the fourth battery cell 100. The buffer 110 is sandwiched between the third battery cell 100 and the fourth battery cell 100. When the battery pack is subjected to a collision, it can buffer the battery cells 100 to reduce the impact force on the battery cells 100, thereby improving the safety of the battery pack.

[0035] Reference Figure 6 , Figure 7 , Figure 6 This is an assembly diagram of the liquid cooling plate 200, the first connector 260, and the second connector 270 according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of the liquid cooling plate 200 according to an embodiment of the present invention. As shown in the figure, in this embodiment, the first side plate 210 is provided with a first flow channel 211 and a liquid inlet, the liquid inlet being connected to the first flow channel 211; the second side plate 220 is provided with a second flow channel 221 and a liquid outlet, the liquid outlet being connected to the second flow channel 221; the connecting plate 230 is provided with a third flow channel 231, the first flow channel 211 being connected to the second flow channel 221 through the third flow channel 231; external coolant flows sequentially through the first side plate 210, the connecting plate 230, and the second side plate 220, so that the first side plate 210, the connecting plate 230, and the second side plate 220 can all cool the battery cell 100, thereby increasing the heat exchange area of ​​the liquid cooling plate 200 and improving the cooling efficiency of the battery module.

[0036] For example, when the battery module is working, the external coolant enters the first flow channel 211 through the inlet, then passes through the third flow channel 231 and the second flow channel 221 in sequence, and finally exits from the outlet. The external coolant passes through the first side plate 210, the connecting plate 230 and the second side plate 220. The first side plate 210 and the second side plate 220 can exchange heat with the battery cell 100 to cool the battery cell 100, which can increase the heat exchange area of ​​the liquid cooling plate 200, thereby improving the cooling efficiency of the battery module.

[0037] In this embodiment, the liquid cooling plate 200 further includes an inlet plate 240 and an outlet plate 250. The inlet plate 240 is connected to the first side plate 210 and is provided with an inlet channel. The inlet channel is connected to the first channel 211 through an inlet port. The outlet plate 250 is connected to the second side plate 220 and is provided with an outlet channel. The outlet channel is connected to the second channel 221 through an outlet port. External coolant flows sequentially through the inlet plate 240, the first side plate 210, the connecting plate 230, the second side plate 220, and the outlet plate 250, which facilitates the introduction and discharge of coolant.

[0038] For example, the inlet channel, the first channel 211, the third channel 231, the second channel 221 and the outlet channel are connected in series. When the battery module is working, the external coolant enters the first channel 211 from the inlet channel, then passes through the third channel 231 and the second channel 221 in sequence, and finally exits from the outlet channel, which facilitates the introduction and discharge of coolant.

[0039] In another embodiment, the first flow channel 211 and the second flow channel 221 are arranged in parallel. The first side plate 210 is connected to the inlet plate 240 and the outlet plate 250. External coolant enters the first flow channel 211 from the inlet flow channel and then exits from the outlet flow channel. The second side plate 220 is connected to the inlet plate 240 and the outlet plate 250. External coolant enters the second flow channel 221 from the inlet flow channel and then exits from the outlet flow channel, ensuring that the first side plate 210 and the second side plate 220 can cool the battery cell 100.

[0040] like Figure 1 , Figure 6 As shown, in this embodiment, the liquid cooling assembly also includes multiple liquid inlet pipes 300. The liquid inlet plate 240 is connected to a first connector 260 that communicates with the liquid inlet channel on both sides along the first direction. In two adjacent liquid cooling plates 200, the first connector 260 of one first side plate 210 is connected to the first connector 260 of the other first side plate 210 through the liquid inlet pipe 300. This facilitates the assembly of multiple liquid inlet pipes 300 and simplifies the pipeline layout of the battery module, thereby improving the assembly efficiency of the battery module.

[0041] For example, the length direction of the liquid inlet pipe 300 is parallel to the first direction. In two adjacent liquid cooling plates 200, the first connector 260 of one of the first side plates 210 is inserted into one end of the liquid inlet pipe 300, and the first connector 260 of the other first side plate 210 is inserted into the other end of the liquid inlet pipe 300, so that the two adjacent liquid cooling plates 200 are arranged in parallel, which facilitates the assembly of multiple liquid inlet pipes 300 and helps to simplify the pipeline layout of the battery module, thereby improving the assembly efficiency of the battery module.

[0042] It should be noted that welding the first connector 260 to the liquid inlet plate 240 ensures a stable connection between the two, preventing the first connector 260 from becoming loose. The welding methods include, but are not limited to, resistance welding, laser welding, or ultrasonic welding.

[0043] In this embodiment, the liquid cooling assembly also includes multiple liquid outlet pipes 400. The liquid outlet plate 250 is connected to the second connector 270 that communicates with the liquid outlet flow channel on both sides along the first direction. In two adjacent liquid cooling plates 200, the second connector 270 of one second side plate 220 is connected to the second connector 270 of the other second side plate 220 through the liquid outlet pipe 400. This facilitates the assembly of multiple liquid outlet pipes 400 and helps to simplify the pipeline layout of the battery module, thereby improving the assembly efficiency of the battery module.

[0044] For example, the length direction of the liquid outlet pipe 400 is parallel to the first direction. In two adjacent liquid cooling plates 200, the second connector 270 of one second side plate 220 is inserted into one end of the liquid outlet pipe 400, and the second connector 270 of the other second side plate 220 is inserted into the other end of the liquid outlet pipe 400, so that the two adjacent liquid cooling plates 200 are arranged in parallel, which facilitates the assembly of multiple liquid outlet pipes 400 and helps to simplify the pipeline layout of the battery module, thereby improving the assembly efficiency of the battery module.

[0045] It should be noted that welding the second connector 270 to the liquid outlet plate 250 ensures a stable connection between the two, preventing the second connector 270 from becoming loose. The welding methods include, but are not limited to, resistance welding, laser welding, or ultrasonic welding.

[0046] Reference Figure 9 , Figure 10 , Figure 9 This is a schematic diagram of the structure of the inlet pipe 300 or the outlet pipe 400 according to an embodiment of the present invention. Figure 10This is a schematic diagram of the internal structure of the inlet pipe 300 or outlet pipe 400 according to an embodiment of the present invention. As shown in the figure, in this embodiment, the inlet pipe 300 includes a first rigid pipe 310 and a first elastic pipe 320. The first elastic pipe 320 is housed within the first rigid pipe 310. In two adjacent liquid cooling plates 200, a first connector 260 is inserted into the first elastic pipe 320 and compresses the first elastic pipe 320 to elastically deform, so that the first connector 260 and the first elastic pipe 320 are in sealed contact. This ensures the reliability of the seal between the first connector 260 and the inlet pipe 300, and eliminates the need for clamps to fix the first connector 260 and the inlet pipe 300, allowing for the assembly of the inlet pipe 300 and improving the assembly efficiency of the inlet pipe 300.

[0047] For example, the first rigid tube 310 is made of rigid materials such as polyvinyl chloride, and the first elastic tube 320 can be made of elastic materials such as silicone or rubber. The first rigid tube 310 and the first elastic tube 320 are an integral structure. The first rigid tube 310 and the first elastic tube 320 can be integrally molded by a two-color injection molding process. The first connector 260 is inserted into the first elastic tube 320, and the first connector 260 squeezes the inner wall of the first elastic tube 320 to produce elastic deformation, so that the inner wall of the first elastic tube 320 is tightly attached to the first connector 260. This can ensure the sealing reliability between the first connector 260 and the liquid inlet tube 300, and facilitate the assembly of the liquid inlet tube 300, thereby improving the assembly efficiency of the liquid inlet tube 300.

[0048] It is understandable that when the inlet pipe 300 is inserted into the first connector 260, the first rigid pipe 310 is housed in the first elastic pipe 320, which can also ensure the sealing reliability between the first connector 260 and the inlet pipe 300.

[0049] In this embodiment, the liquid outlet pipe 400 includes a second rigid pipe 410 and a second elastic pipe 420. The second elastic pipe 420 is housed within the second rigid pipe 410. In two adjacent liquid cooling plates 200, a second connector 270 is inserted into the second elastic pipe 420 and compresses the second elastic pipe 420 to elastically deform, so that the second connector 270 and the second elastic pipe 420 are in sealed contact. This ensures the sealing reliability between the second connector 270 and the liquid outlet pipe 400, and eliminates the need to use clamps to fix the second connector 270 and the liquid outlet pipe 400, making it easier to assemble the liquid outlet pipe 400 and thus improving the assembly efficiency of the liquid outlet pipe 400.

[0050] For example, the second rigid tube 410 is made of rigid materials such as polyvinyl chloride, and the second elastic tube 420 can be made of elastic materials such as silicone or rubber. The second rigid tube 410 and the second elastic tube 420 are an integral structure. The second rigid tube 410 and the second elastic tube 420 can be integrally molded through a two-color injection molding process. The second connector 270 is inserted into the second elastic tube 420, and the second connector 270 compresses the inner wall of the second elastic tube 420 to produce elastic deformation, so that the inner wall of the second elastic tube 420 is tightly attached to the second connector 270. This can ensure the sealing reliability between the second connector 270 and the liquid outlet tube 400, and facilitate the assembly of the liquid outlet tube 400, thereby improving the assembly efficiency of the liquid outlet tube 400.

[0051] It is understandable that when the outlet pipe 400 is inserted into the second connector 270, the second rigid pipe 410 is housed in the second elastic pipe 420, which can also ensure the sealing reliability between the second connector 270 and the outlet pipe 400.

[0052] In this embodiment, the battery module has a second direction perpendicular to the first direction. The liquid inlet plate 240 is located on one side of the first side plate 210 along the second direction, and the liquid outlet plate 250 is located on the side of the second side plate 220 away from the liquid inlet plate 240 along the second direction. This can avoid interference between the liquid inlet pipe 300 and the liquid outlet pipe 400 and optimize the pipeline layout of the battery module.

[0053] like Figure 4 As shown, in this embodiment, the battery module has a third direction perpendicular to the first direction. The connecting plate 230 is located below the first side plate 210 and the second side plate 220. The first flow channel 211 includes multiple first flow channel segments arranged vertically. The liquid inlet is connected to the uppermost first flow channel segment, which can ensure that the coolant fills each first flow channel segment so that the battery cell 100 is cooled evenly.

[0054] For example, after the external coolant flows into the uppermost first flow channel section from the inlet, the coolant flows downward to each of the lower first flow channel sections under its own gravity, which can ensure that the coolant fills each first flow channel section, so as to cool the battery cell 100 evenly.

[0055] In another implementation, the connecting plate 230 is located above the first side plate 210 and the second side plate 220, and the liquid inlet is connected to the first flow channel section located at the bottom, which can also ensure that the coolant fills each of the first flow channel sections.

[0056] like Figure 4As shown, in this embodiment, the connecting plate 230 is located below the first side plate 210 and the second side plate 220. The second flow channel 221 includes a plurality of second flow channel segments arranged along a third direction. The liquid outlet is connected to the uppermost second flow channel segment, which can ensure that the coolant fills each second flow channel segment so that the battery cell 100 is cooled evenly.

[0057] For example, the coolant flows from the third flow channel 231 into the lowermost second flow channel section. Under the action of the coolant flow pressure, the coolant gradually flows upward and finally flows out from the uppermost second flow channel section to the outlet flow channel. This ensures that the coolant fills each second flow channel section, so that the battery cell 100 is cooled evenly.

[0058] In another implementation, the connecting plate 230 is located above the first side plate 210 and the second side plate 220, and the liquid outlet is connected to the second flow channel section located at the bottom, which can also ensure that the coolant fills each second flow channel section.

[0059] As another implementation method, refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of a liquid cooling assembly according to another embodiment of the present invention. As shown in the figure, the liquid inlet channel is connected to the first channel 211 located at the bottom, and the liquid outlet channel is connected to the second channel 221 located at the bottom. The coolant in the liquid inlet pipe 300 passes through the liquid inlet channel, the first channel 211, the third channel 231, the second channel 221 and the liquid outlet channel in sequence, and is finally discharged from the liquid outlet pipe 400.

[0060] Reference Figure 7 , Figure 8 , Figure 8This is an exploded view of the liquid cooling plate 200 according to an embodiment of the present invention. As shown in the figure, in this embodiment, the battery module has a second direction and a third direction, which are perpendicular to each other. The liquid cooling plate 200 also includes a sealing member 500 disposed opposite to each other along the second direction. The connecting plate 230 is located on one side of the first side plate 210 along the third direction. The liquid cooling plate 200 has openings 203 on both sides along the second direction. The sealing member 500 seals the openings 203 on the same side. The first side plate 210 has a first flow channel 211, which includes multiple first flow channel segments arranged along the third direction and third flow channel segments disposed opposite to each other along the second direction. The second side plate 220 has a second flow channel 221. 221 includes multiple second flow channel segments arranged along a third direction and a fourth flow channel segment arranged opposite to each other along a second direction. The connecting plate 230 is provided with a third flow channel 231, which includes multiple fifth flow channel segments arranged along a first direction and a sixth flow channel segment arranged opposite to each other along a second direction. The third, fourth, and sixth flow channel segments are all connected to the opening 203 located on the same side. On the one hand, the coolant can fill the first flow channel 211, the second flow channel 221, and the third flow channel 231 to improve the cooling efficiency of the liquid cooling plate 200. On the other hand, it can facilitate the production and manufacturing of the liquid cooling plate 200, thereby reducing the production and manufacturing cost of the liquid cooling plate 200.

[0061] For example, taking the first direction as the front-back direction, the second direction as the left-right direction, and the third direction as the up-down direction, on the projection plane perpendicular to the left-right direction, the projection of the liquid cooling plate 200 has a U-shaped structure. The first side plate 210 has multiple first partition strips arranged in the up-down direction to form multiple first flow channel segments. The third flow channel segment is located between the sealing member 500 and the first partition strips. The second side plate 220 has multiple second partition strips arranged in the up-down direction to form multiple second flow channel segments. The fourth flow channel segment is located between the sealing member 500 and the second partition strips, connecting... The connecting plate 230 has multiple third partition strips arranged in the front-to-back direction to form multiple fifth flow channel sections. The sixth flow channel section is located between the third partition strips and the sealing member 500, so that the first side plate 210, the second side plate 220 and the connecting plate 230 can be integrally formed by die casting. After the first side plate 210, the second side plate 220 and the connecting plate 230 are formed, the sealing member 500 seals the opening 203 on the same side by welding, which facilitates the production of the liquid cooling plate 200 and reduces the production cost of the liquid cooling plate 200.

[0062] Understandably, the first and third flow channels are serpentine in shape, which can guide the coolant to flow in an orderly manner within the first flow channel 211, ensuring uniform cooling of the battery cells 100. Similarly, the second and fourth flow channels are serpentine in shape, which can guide the coolant to flow in an orderly manner within the second flow channel 221. Likewise, the fifth and sixth flow channels are serpentine in shape, which can guide the coolant to flow in an orderly manner within the second flow channel 221.

[0063] In another embodiment, the liquid cooling plate 200 includes a U-shaped outer plate and a U-shaped inner plate, with the U-shaped inner plate located inside the U-shaped outer plate. The U-shaped outer plate and the U-shaped inner plate are connected, forming a first flow channel 211, a second flow channel 221, and a third flow channel 231, which can also be used to manufacture the liquid cooling plate 200.

[0064] The second aspect of this utility model provides a battery pack, including a housing and a battery module according to the first aspect of this utility model, wherein the battery module is housed within the housing.

[0065] When the battery module of the first aspect of this utility model is used, the first side plate 210 and the second side plate 220 of each liquid cooling plate 200 cool the battery cell 100 located in the receiving groove 201 and the receiving space. It is not necessary to place a liquid cooling plate 200 every other battery cell 100 or every two battery cells 100, which can reduce the number of liquid cooling plates 200 and improve the assembly efficiency of the battery module.

[0066] Since the battery pack adopts all the technical solutions of the battery module in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be repeated here.

[0067] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery module having a first orientation, characterized in that, The battery module includes: Multiple battery cells (100) arranged along the first direction. A liquid cooling assembly includes a plurality of liquid cooling plates (200) arranged along a first direction. Each liquid cooling plate (200) includes a connecting plate (230), a first side plate (210), and a second side plate (220). The first side plate (210) and the second side plate (220) are arranged opposite to each other along the first direction. The connecting plate (230) is connected between the first side plate (210) and the second side plate (220). The connecting plate (230), the first side plate (210), and the second side plate (220) form a receiving groove (201). The receiving groove (201) contains the battery cell (100). In adjacent liquid cooling plates (200), the first side plate (210) of one liquid cooling plate (200) and the second side plate (220) of another liquid cooling plate (200) form a receiving space. The receiving space contains the battery cell (100).

2. The battery module according to claim 1, characterized in that, The receiving slot (201) contains at least two of the battery cells (100), and / or the receiving space contains at least two of the battery cells (100).

3. The battery module according to claim 1, characterized in that, The first side plate (210) is provided with a first flow channel (211) and an inlet that connects to the first flow channel (211). The second side plate (220) is provided with a second flow channel (221) and an outlet that connects to the second flow channel (221). The connecting plate (230) is provided with a third flow channel (231). The first flow channel (211) connects to the second flow channel (221) through the third flow channel (231).

4. The battery module according to claim 3, characterized in that, The liquid cooling plate (200) further includes an inlet plate (240) and an outlet plate (250). The inlet plate (240) is connected to the first side plate (210) and has an inlet channel. The inlet channel is connected to the first channel (211) through the inlet port. The outlet plate (250) is connected to the second side plate (220) and has an outlet channel. The outlet channel is connected to the second channel (221) through the outlet port.

5. The battery module according to claim 4, characterized in that, The liquid cooling assembly further includes multiple liquid inlet pipes (300), and the liquid inlet plate (240) is connected to a first connector (260) communicating with the liquid inlet channel on both sides along the first direction. In two adjacent liquid cooling plates (200), the first connector (260) of one of the first side plates (210) is connected to the first connector (260) of the other first side plate (210) through the liquid inlet pipe (300); and / or, The liquid cooling assembly also includes a plurality of liquid outlet pipes (400). The liquid outlet plate (250) is connected to a second connector (270) that communicates with the liquid outlet channel on both sides along the first direction. In two adjacent liquid cooling plates (200), the second connector (270) of one of the second side plates (220) is connected to the second connector (270) of the other second side plate (220) through the liquid outlet pipe (400).

6. The battery module according to claim 5, characterized in that, The inlet pipe (300) includes a first rigid pipe (310) and a first elastic pipe (320). The first elastic pipe (320) is housed within the first rigid pipe (310). In two adjacent liquid cooling plates (200), the first connector (260) is inserted into the first elastic pipe (320) and compresses it to elastically deform; and / or, The liquid outlet pipe (400) includes a second rigid pipe (410) and a second elastic pipe (420). The second elastic pipe (420) is housed in the second rigid pipe (410) and in two adjacent liquid cooling plates (200). The second connector (270) is inserted into the second elastic pipe (420) and squeezes the second elastic pipe (420) to elastically deform.

7. The battery module according to claim 4, characterized in that, The battery module has a second direction perpendicular to the first direction, the liquid inlet plate (240) is located on one side of the first side plate (210) along the second direction, and the liquid outlet plate (250) is located on the side of the second side plate (220) opposite to the liquid inlet plate (240) along the second direction.

8. The battery module according to claim 3, characterized in that, The battery module has a third direction perpendicular to the first direction, the connecting plate (230) is located on one side of the first side plate (210) along the third direction, the first flow channel (211) includes a plurality of first flow channel segments arranged along the third direction, and the liquid inlet communicates with the first flow channel segment furthest from the connecting plate (230); and / or, The second flow channel (221) is configured with multiple segments, each including multiple second flow channel segments arranged along the third direction, and the outlet is connected to the second flow channel segment furthest from the connecting plate (230).

9. The battery module according to claim 1, characterized in that, The battery module has a second direction and a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the liquid cooling plate (200) also includes a sealing member (500) disposed opposite to each other along the second direction, the connecting plate (230) is located on one side of the first side plate (210) along the third direction, the liquid cooling plate (200) is provided with openings (203) on both sides along the second direction, and the sealing member (500) seals the openings (203) located on the same side. The first side plate (210) is provided with a first flow channel (211), the first flow channel including a plurality of first flow channel segments arranged along the third direction and third flow channel segments arranged opposite to each other along the second direction, the third flow channel segments communicating with the opening (203) located on the same side; and / or, The second side plate (220) is provided with a second flow channel (221), the second flow channel (221) including a plurality of second flow channel segments arranged along the third direction and a fourth flow channel segment arranged opposite to each other along the second direction, the fourth flow channel segment communicating with the opening (203) located on the same side; and / or, The connecting plate (230) is provided with a third flow channel (231), which includes a plurality of fifth flow channel segments arranged along the first direction and a sixth flow channel segment arranged opposite to each other along the second direction. The sixth flow channel segment is connected to the opening (203) located on the same side.

10. A battery pack, characterized in that, include: The housing and the battery module according to any one of claims 1 to 9, wherein the battery module is housed within the housing.

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