Battery module

Abstract

The utility model relates to a battery module and relates to the technical field of batteries. The utility model provides a battery module. The battery module comprises a cooling plate, a box body, a baffle structure and a battery cell module, the baffle structure is arranged in the box body and divides the containing cavity into a cooling chamber and a flow inlet chamber, at least one adjacent face is arranged between the flow inlet chamber adjacent to the cooling chamber and the cooling chamber, the cooling chamber and the flow inlet chamber are communicated with the cooling plate, a plurality of first flow inlet holes are formed in the adjacent face, and the cooling chamber and the flow inlet chamber are communicated through the first flow inlet holes; the battery cell module is arranged in the cooling chamber; by arranging the baffle structure, the baffle structure divides the accommodating cavity into the cooling chamber and the inflow chamber, so that at least one adjacent surface is arranged between the cooling chamber and the inflow chamber, a cooling medium can enter the cooling chamber through the inflow chamber, and the cooling medium entering the cooling chamber can perform flowable uniform heat dissipation on the battery cell module in at least one direction; the temperature uniformity of the battery cell module is improved, and the service life of the battery module is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery module. Background Art

[0002] In recent years, the market has become increasingly demanding in terms of vehicle range and intelligence, and the series-parallel connection of more battery modules is undoubtedly one of the most common approaches to solving this problem. However, the use of more battery modules also places high demands on their cooling methods.

[0003] The inventors have discovered that, firstly, common cooling plates on the market can cool the battery modules in contact with them, but with the application of multiple modules, there will inevitably be uneven temperatures between battery cells due to different distances from the cooling plates, thus affecting the life of the entire system.

[0004] Secondly, immersion cooling places all battery modules within a cooling medium, switching the heat dissipation method from indirect solid heat conduction to liquid convection, thus avoiding the space constraints of the cooling plate. However, even if the module is completely immersed in the cooling medium, the cooling effect will be greatly reduced if the fluid flow direction is relatively limited. Utility Model Content

[0005] The purpose of the present utility model is to provide a battery module, which can cool the battery module on one side or multiple sides, thereby improving the overall temperature uniformity and increasing the life of the battery module.

[0006] The embodiment of the present utility model is achieved as follows:

[0007] The utility model proposes a battery module, including a cooling plate, a box body, a baffle structure and a battery cell module; a cooling medium flows in the cooling plate; the cooling plate is connected to the box body to form a accommodating cavity; the baffle structure is arranged in the box body and divides the accommodating cavity into a cooling chamber and an inlet chamber, and at least one adjacent surface is provided between the inlet chamber adjacent to the cooling chamber and the cooling chamber, the cooling chamber and the inlet chamber are respectively communicated with the cooling plate, a plurality of first inlet holes are provided on the adjacent surfaces, and the cooling chamber and the inlet chamber are communicated through the first inlet holes; the battery cell module is arranged in the cooling chamber.

[0008] Optionally, a first flow channel and a second flow channel that are not connected are provided in the cooling plate, the first flow channel is communicated with the inlet chamber, and the second flow channel is communicated with the cooling chamber.

[0009] Optionally, the cooling plate comprises a first flow channel plate and a cover plate arranged oppositely and connected, the first flow channel plate is provided with the first flow channel and the second flow channel, the cover plate is provided with a plurality of first openings and second openings, the first flow channel communicates with the inflow chamber through the first openings, and the second flow channel communicates with the cooling chamber through the second openings.

[0010] The cover plate comprises a flat plate or a second flow channel plate, and the second flow channel plate is provided with a flow channel structure corresponding to the first flow channel and the second flow channel.

[0011] Optionally, the cover plate is provided with an inlet communicating with the first flow channel, and the inlet is provided with an inlet pipe joint.

[0012] The cover plate is provided with an outlet communicating with the second flow channel, and the outlet is provided with an outlet pipe joint.

[0013] Optionally, the baffle structure comprises a first baffle, the first baffle is provided with the first inflow hole, the first baffle is arranged in a rectangular structure, and the first baffle is arranged in the box.

[0014] The inflow chamber is arranged in a rectangular ring-shaped cavity, and the inflow chamber completely surrounds the cooling chamber, so that four adjacent surfaces are arranged between the inflow chamber and the cooling chamber.

[0015] Optionally, the baffle structure further comprises four second baffles arranged in the inflow chamber, one end of the four second baffles is connected with the first baffle, and the other end is connected with the inner wall of the box.

[0016] The four second baffles form a connected flow distribution chamber, a front inflow chamber and a flow distribution chamber, and the flow distribution chamber is arranged close to the inlet of the first flow channel.

[0017] The second baffle is provided with a plurality of second inflow holes, so that the flow distribution chamber, the front inflow chamber, the flow distribution chamber and the inflow chamber are connected with each other.

[0018] Optionally, the baffle structure comprises a third baffle, the third baffle is provided with the first inflow hole, the third baffle is arranged in a U-shaped structure, and the two ends of the U-shaped third baffle are connected with the inner wall of the box.

[0019] The inflow chamber is arranged in a U-shaped cavity, and the inflow chamber surrounds the cooling chamber, so that three adjacent surfaces are arranged between the inflow chamber and the cooling chamber.

[0020] Optionally, a plurality of first inflow holes are uniformly and spacedly arranged along the top of the adjacent surface.

[0021] Optionally, the battery module further comprises a top plate, the top plate is arranged on the top of the baffle structure, the top plate is located below the plurality of first flow holes, the top of the top plate and the baffle structure form a converging chamber, the converging chamber is communicated with the flow chamber, and the bottom of the top plate and the baffle structure form the cooling chamber.

[0022] The third flow hole is arranged on the top plate, so that the cooling chamber and the converging chamber are communicated.

[0023] Optionally, the top plate is a concave curved plate or a flat plate.

[0024] The beneficial effects of the embodiment of the utility model are as follows:

[0025] The battery module has the baffle structure with the first flow hole, the baffle structure divides the containing cavity into the cooling chamber and the flow chamber, at least one adjacent surface is arranged between the cooling chamber and the flow chamber, the cooling medium can enter the cooling chamber through the flow chamber, the cooling medium in the cooling chamber can flow in at least one direction to uniformly radiate heat for the battery cell module, the temperature uniformity of the battery cell module is improved, the service life of the battery module is improved, and the process feasibility of the whole battery module is relatively simple. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for the ordinary skilled in the art, other related drawings can be obtained without the creative labor on the premise of the drawings.

[0027] Figure 1 It is a structural schematic view of the battery module of the embodiment of the utility model;

[0028] Figure 2 It is an explosion view of the battery module of the embodiment of the utility model;

[0029] Figure 3 It is a structural schematic view of the first flow channel plate of the embodiment of the utility model;

[0030] Figure 4 It is a structural schematic view of the cover plate of the embodiment of the utility model;

[0031] Figure 5 It is a schematic view of the battery module three-side flow of the embodiment of the utility model;

[0032] Figure 6 It is a first schematic view of the battery module four-side flow of the embodiment of the utility model;

[0033] Figure 7This is a second schematic diagram of a battery module with air inflow from four sides according to an embodiment of the present utility model;

[0034] Figure 8 This is a schematic diagram of the top surface inflow of the battery module according to an embodiment of the present invention.

[0035] Icons: 010-battery module; 100-cell module; 200-housing; 210-housing body; 220-end cover; 300-cooling plate; 310-first flow channel plate; 311-first flow channel; 312-second flow channel; 3121-outlet flow channel section; 3122-first flow channel section; 3123-second flow channel section; 320-cover plate; 321-first opening; 322-second opening; 323-inlet; 324-outlet; 301 -Inlet pipe connection; 302-Outlet pipe connection; 400-Accommodation chamber; 410-Inlet chamber; 420-Cooling chamber; 430-Diversion chamber; 440-Front-end inlet chamber; 450-Flow distribution chamber; 460-Converging chamber; 500-Baffle structure; 501-Adjacent surface; 502-First inlet hole; 510-First baffle; 520-Second baffle; 521-Second inlet hole; 530-Third baffle; 540-Top plate; 541-Third inlet hole. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0041] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] The present invention proposes a battery module 010 , which can enable the cooling medium around the battery cell module 100 to flow and dissipate heat, thereby improving the temperature uniformity of the battery cell module 100 .

[0043] Please refer to Figure 1 and Figure 2 , this embodiment provides a battery module 010, including a cooling plate 300, a box body 200, a baffle structure 500 and a battery cell module 100; a cooling medium flows in the cooling plate 300; the cooling plate 300 is connected to the box body 200 to form a accommodating cavity 400; the baffle structure 500 is arranged in the box body 200 and divides the accommodating cavity 400 into a cooling chamber 420 and an inlet chamber 410, and at least one adjacent surface 501 is provided between the inlet chamber 410 adjacent to the cooling chamber 420 and the cooling chamber 420, and the cooling chamber 420 and the inlet chamber 410 are respectively communicated with the cooling plate 300, and a plurality of first inlet holes 502 are provided on the baffle structure 500, and the cooling chamber 420 and the inlet chamber 410 are communicated through the first inlet holes 502; the battery cell module 100 is arranged in the cooling chamber 420.

[0044] It can be understood that by providing a baffle structure 500 with a first inlet hole 502, the accommodating chamber 400 is divided into a cooling chamber 420 and an inlet chamber 410. At least one adjacent surface 501 is provided between the cooling chamber 420 and the inlet chamber 410. The cooling medium can enter the cooling chamber 420 through the inlet chamber 410. The cooling medium entering the cooling chamber 420 can flow and evenly dissipate heat to the battery cell module 100 in at least one direction. The cooling medium after heat dissipation flows out from the cooling plate 300, thereby improving the temperature uniformity of the battery cell module 100 and reducing the impact on the life of the entire system.

[0045] Please refer to Figure 2 In this embodiment, the battery module 010 includes a battery cell module 100 .

[0046] The battery cell module 100 is disposed in the cooling chamber 420 .

[0047] Please refer to Figures 2-4 In this embodiment, the battery module 010 includes a cooling plate 300 .

[0048] In this embodiment, the cooling plate 300 includes a first flow channel plate 310 and a cover plate 320 that are oppositely arranged and connected; Figure 3 The first flow channel plate 310 is provided with a first flow channel 311 and a second flow channel 312, wherein a cooling medium flows through the first flow channel 311 and the second flow channel 312, the first flow channel 311 and the second flow channel 312 are not connected, and the first flow channel 311 and the second flow channel 312 are connected through the inlet chamber 410 and the cooling chamber 420; please refer to Figure 4 The cover plate 320 is provided with a plurality of first openings 321 and second openings 322. The plurality of first openings 321 are arranged corresponding to the first flow channel 311 so that the first flow channel 311 is connected to the inlet chamber 410 through the first openings 321. The plurality of second openings 322 are arranged corresponding to the second flow channel 312 so that the second flow channel 312 is connected to the cooling chamber 420 through the second openings 322.

[0049] In this embodiment, please refer to Figure 2 and Figure 4 The cover plate 320 is provided with an inlet 323 at the input end relative to the first flow channel 311, the inlet 323 is connected to the first flow channel 311, and an inlet pipe connection 301 is provided at the inlet 323; the cover plate 320 is provided with an outlet 324 at the output end relative to the second flow channel 312, the outlet 324 is connected to the second flow channel 312, and an outlet pipe connection 302 is provided at the outlet 324.

[0050] Optionally, the first flow channel 311 and the second flow channel 312 may be composed of a plurality of connected single flow channels, or may be composed of a flow channel with continuous bends, or may be a double flow channel or a plurality of flow channels. For details on the configuration of the flow channels, please refer to the following.

[0051] In this embodiment, the cover plate 320 is a flat plate.

[0052] Of course, in other embodiments, the cover plate 320 may also be a second flow channel 312 plate, with the second flow channel 312 plate having flow channel structures corresponding to the first flow channel 311 and the second flow channel 312, respectively. Specifically, the second flow channel 312 plate has a third flow channel corresponding to the first flow channel 311 and a fourth flow channel corresponding to the second flow channel 312. The second flow channel 312 plate has multiple first openings 321 at the position of the third flow channel, and multiple second openings 322 at the position of the fourth flow channel. It is understood that the flow channels formed in this manner have a greater flow rate of cooling medium and higher cooling efficiency.

[0053] In this embodiment, the cover plate 320 and the first flow channel plate 310 are separate structures and are welded together to form the cooling plate 300. Of course, in other embodiments, the cover plate 320 and the first flow channel plate 310 can also be an integrally formed structure.

[0054] Please refer to Figure 1 and Figure 2 In this embodiment, the battery module 010 includes a box body 200 .

[0055] Among them, the box body 200 includes a box body 210 and an end cover 220, the top of the box body 210 is connected to the end cover 220, and the bottom of the box body 210 is connected to the cooling plate 300, so that the two ends of the box body 210 are respectively connected to the end cover 220 and the cooling plate 300 to form a accommodating cavity 400.

[0056] In this embodiment, the box body 210 and the end cover 220 are separate structures, which are subsequently welded together and the battery module is installed in the accommodating cavity 400, which facilitates the overall processing of the battery module 010.

[0057] Of course, in other embodiments, the box body 210 and the end cover 220 may also be an integrally formed structure, and the battery module is loaded into the integrally formed box body 200 from the bottom of the box body 200 , and then the cooling plate 300 is welded to the box body 200 .

[0058] Please refer to Figures 5-8 In this embodiment, the battery module 010 includes a baffle structure 500 .

[0059] Among them, the baffle structure 500 is arranged in the box body 200 and divides the accommodating chamber 400 into a cooling chamber 420 and an inlet chamber 410. At least one adjacent surface 501 is provided between the inlet chamber 410 and the cooling chamber 420. The cooling chamber 420 and the inlet chamber 410 are respectively connected to the cooling plate 300. A plurality of first inlet holes 502 are provided on the adjacent surface 501. The cooling chamber 420 and the inlet chamber 410 are connected through the first inlet holes 502.

[0060] It can be understood that the baffle structure 500 divides the accommodating cavity 400 into a cooling chamber 420 and an inlet chamber 410. After the cooling medium enters the inlet chamber 410, it enters the cooling chamber 420 through the first inlet hole 502 on the adjacent surface 501 to cool at least one surface of the battery cell module 100. The cooling medium flows evenly in the cooling chamber 420 and evenly dissipates heat to the battery cell module 100 in the cooling chamber 420. The cooling medium after heat dissipation flows out from the cooling plate 300, thereby improving the temperature uniformity of the battery cell module 100 and reducing the impact on the life of the entire system.

[0061] In this embodiment, a plurality of first inlet holes 502 are evenly spaced along the tops of adjacent surfaces 501. It is understood that the cooling medium gradually flows from the top of the cooling chamber 420 toward the battery cell module 100 through the first inlet holes 502, allowing the cooling medium to cool the battery cell module 100 over a wider range.

[0062] Optionally, the multiple first inlet holes 502 may be arranged in the same row, or the multiple first inlet holes 502 may be arranged in two or more rows.

[0063] Optionally, the plurality of first inlet holes 502 may be arranged in a staggered manner along the height direction, that is, the plurality of inlet holes may not all be at the same height.

[0064] Optionally, the plurality of first inlet holes 502 may be arranged at uneven intervals along the tops of the adjacent surfaces 501 .

[0065] Optionally, the baffle structure 500 may be in a "口"-shaped structure, in which case the baffle structure 500 forms four adjacent surfaces 501, and the battery module 010 is cooled by inflow from four sides; the baffle structure 500 may be in a "]"-shaped structure, in which case the baffle structure 500 forms three adjacent surfaces 501, and the battery module 010 is cooled by inflow from three sides; the baffle structure 500 may be in a "┑"-shaped structure, in which case the baffle structure 500 forms two adjacent surfaces 501, and the battery module 010 is cooled by inflow from two sides; the baffle structure 500 may be in a "一"-shaped structure, in which case the baffle structure 500 forms one adjacent surface 501, and the battery module 010 is cooled by inflow from one side.

[0066] Optionally, the baffle structure 500 may be provided with a wave structure, which may improve the heat exchange performance. The baffle structure 500 may be provided with a spoiler structure, such as a raised spoiler structure, which may also improve the heat exchange performance.

[0067] In some embodiments, when there is one adjacent surface 501 between the inflow chamber 410 and the cooling chamber 420, the battery module 010 is subjected to single-sided inflow cooling. The baffle structure 500 is a rectangular plate member, the left and right side edges of the rectangular plate member are connected with the inner wall of the box body 210, the top side edge of the rectangular plate member is connected with the end cover 220, and the bottom side edge of the rectangular plate member is connected with the cooling plate 300; thereby separating the containing cavity 400 into the rectangular inflow chamber 410 and the rectangular cooling chamber 420.

[0068] Correspondingly, the first flow channel 311 is arranged corresponding to the area where the inflow chamber 410 is located, and the first flow channel 311 is a single flow channel; the second flow channel 312 is arranged corresponding to the area where the cooling chamber 420 is located, and the second flow channel 312 is a plurality of flow channels in communication.

[0069] In some embodiments, when there are two adjacent surfaces 501 between the inflow chamber 410 and the cooling chamber 420, the battery module 010 is subjected to double-sided inflow cooling. The baffle structure 500 is an L-shaped plate member, the two side edges of the L-shaped plate member are connected with the inner wall of the box body 210, the top end of the L-shaped plate member is connected with the end cover 220, and the bottom end of the L-shaped plate member is connected with the cooling plate 300; thereby separating the containing cavity 400 into the rectangular cooling chamber 420 and the L-shaped inflow chamber 410.

[0070] Correspondingly, the first flow channel 311 is arranged corresponding to the area where the inflow chamber 410 is located, and the first flow channel 311 is an L-shaped flow channel; the second flow channel 312 is arranged corresponding to the area where the cooling chamber 420 is located, and the second flow channel 312 is a plurality of flow channels in communication.

[0071] It can be understood that the L-shaped plate member has two adjacent surfaces 501, the inflow chamber 410 is communicated with the cooling chamber 420 through the first inflow hole 502 on the two adjacent surfaces 501, and the cooling medium enters the cooling chamber 420 from two directions to cool the battery module 100.

[0072] Please refer to Figure 5 In some embodiments, when there are three adjacent surfaces 501 between the inflow chamber 410 and the cooling chamber 420, the battery module 010 is subjected to three-sided inflow cooling.

[0073] Specifically, the baffle structure 500 includes a third baffle 530, the third baffle 530 is provided with a first inflow hole 502, the third baffle 530 is arranged in a U-shaped structure, and the two ends of the U-shaped third baffle 530 are connected with the same inner wall of the box body 210; the inflow chamber 410 is arranged in a U-shaped cavity, and the inflow chamber 410 surrounds the cooling chamber 420, so that there are three adjacent surfaces 501 between the inflow chamber 410 and the cooling chamber 420.

[0074] Accordingly, the first flow channel 311 is provided in the region corresponding to the inlet chamber 410 and is a U-shaped flow channel. The second flow channel 312 is provided in the region corresponding to the cooling chamber 420 and includes an outlet flow channel section 3121, a first flow channel section 3122, and a plurality of second flow channel sections 3123. The plurality of second flow channel sections 3123 are aligned, with the first flow channel section 3122 provided to the left of the plurality of second flow channel sections 3123 and interconnecting the plurality of second flow channel sections 3123. The outlet flow channel section 3121 is provided to the left of the first flow channel section 3122. The outlet flow channel section 3121 is the output end of the second flow channel 312 and is connected to the outlet pipe connection 302 via the outlet 324 of the cover plate 320.

[0075] Alternatively, the inlet 323 may be disposed in the middle of the first flow channel section 3122. For example, the medium may flow from the inlet 323 toward the other two sides, flow toward the first flow channel section 3122, flow within the first flow channel section 3122, and enter the inlet chamber 410 through the first opening 321. Similarly, the outlet 324 may also be disposed in the middle of the second flow channel section 3123.

[0076] It is understood that the operating principle of this embodiment is as follows: the cooling medium enters the first flow channel 311 from the inlet pipe connection 301. The cooling medium in the first flow channel 311 enters the inlet chamber 410 through the first opening 321. The cooling medium in the inlet chamber 410 enters the cooling chamber 420 through the first inlet holes 502 on the three adjacent surfaces 501 of the third baffle 530. The cooling medium enters the cooling chamber 420 from three directions. The flow of the cooling medium in these three directions removes heat from the battery cell module 100, thereby cooling the battery cell module 100. At the same time, the cooling medium gradually flows from the top of the cooling chamber 420 toward the battery cell module 100 through the first inlet holes 502, enters the second flow channel 312 from the second opening 322 at the bottom, and finally flows out of the outlet pipe connection 302 through the outlet 324. At this point, the entire cooling medium flow ends. This embodiment satisfies the fluid flow on three sides of the battery cell module 100 through the U-shaped first flow channel 311 and the flow inlet chamber 410, thereby further improving the temperature uniformity of the battery cell module 100.

[0077] It is worth noting that when the first openings 321 are evenly arranged, the flow rate in areas farther from the inlet pipe connector 301 within the first flow channel 311 will be smaller. To ensure flow rate consistency as much as possible, the diameters of the first openings 321 at different locations can be appropriately modified. For example, the diameters of the first openings 321 farther from the inlet pipe connector 301 can be larger than the diameters of the first openings 321 closer to the inlet pipe connector 301.

[0078] Please refer to Figure 6 and Figure 7In some embodiments, when there are four adjacent surfaces 501 between the inlet chamber 410 and the cooling chamber 420 , the battery module 010 is cooled by inlet cooling on four sides.

[0079] Specifically, the baffle structure 500 includes a first baffle 510, the first baffle 510 is provided with a first inlet hole 502, the first baffle 510 is arranged in a rectangular structure, and the first baffle 510 is arranged in the box body 200; the inlet chamber 410 is arranged in a rectangular annular cavity, and the inlet chamber 410 completely surrounds the cooling chamber 420, so that four adjacent surfaces 501 are provided between the inlet chamber 410 and the cooling chamber 420.

[0080] Furthermore, the baffle structure 500 also includes four second baffles 520 arranged in the inlet chamber 410, one end of the four second baffles 520 is connected to the first baffle 510, and the other end is connected to the inner wall of the box body 200; the four second baffles 520 form a connected diversion chamber 430, a front end inlet chamber 440 and a flow distribution chamber 450, and the diversion chamber 430 is arranged near the inlet 323 of the first flow channel 311; a plurality of second inlet holes 521 are provided on the second baffle 520 to connect the diversion chamber 430, the front end inlet chamber 440, the flow distribution chamber 450 and the inlet chamber 410 to each other.

[0081] Accordingly, the first flow channel 311 is provided in the region corresponding to the inlet chamber 410 and is a U-shaped flow channel. The second flow channel 312 is provided in the region corresponding to the cooling chamber 420 and includes an outlet flow channel section 3121, a first flow channel section 3122, and a plurality of second flow channel sections 3123. The plurality of second flow channel sections 3123 are aligned, with the first flow channel section 3122 provided to the left of the plurality of second flow channel sections 3123 and interconnecting the plurality of second flow channel sections 3123. The outlet flow channel section 3121 is provided to the left of the first flow channel section 3122. The outlet flow channel section 3121 is the output end of the second flow channel 312 and is connected to the outlet pipe connection 302 via the outlet 324 of the cover plate 320.

[0082] The second inlet holes 521 on the second baffle 520 are evenly arranged vertically. The second inlet holes 521 on the second baffle 520 between the front inlet chamber 440, the diverter chamber 430, and the flow distribution chamber 450 serve as secondary flow passage holes, while the second inlet holes 521 on the second baffle 520 between the inlet chamber 410, the diverter chamber 430, and the flow distribution chamber 450 serve as primary flow passage holes. The primary flow passage holes have a larger diameter than the secondary flow passage holes. This arrangement of the apertures helps distribute the flow of the cooling medium.

[0083] It can be understood that the working principle of this embodiment is as follows: the cooling medium enters the diverter chamber 430 from the inlet pipe connection 301; in the diverter chamber 430, most of the fluid will enter the inlet chamber 410 through the larger second inlet hole 521 on the second baffle 520 between the diverter chamber 430 and the inlet chamber 410, and the remaining fluid will enter the front inlet chamber 440 through the smaller second inlet hole 521 on the second baffle 520 between the diverter chamber 430 and the front inlet chamber 440. The cooling medium in the front inlet chamber 440 enters the cooling chamber 420 through the first inlet hole 502, and the cooling medium cools the battery cell module 100 in the cooling chamber 420 from the first direction. At the same time, the cooling medium continues to circulate within the first flow channel 311 and enters the inlet chamber 410 through the first opening 321. The cooling medium within the inlet chamber 410 enters the cooling chamber 420 through the first inlet holes 502 on the three adjacent surfaces 501 of the third baffle 530. The cooling medium enters the cooling chamber 420 from three directions. At this time, the cooling medium flowing from four directions removes heat from the battery module 100, thereby cooling the battery module 100. That is, the cooling medium flows from all four directions to cool the battery module 010. Finally, the cooling medium entering the cooling chamber 420 will gradually flow from the top of the cooling chamber 420 to the bottom of the battery module 100, enter the second flow channel 312 through the second opening 322, and finally flow out from the outlet pipe connection 302.

[0084] Among them, if the cooling medium flow rate in the front-end inlet chamber 440 is much greater than the flow rate of the inlet chamber 410 adjacent to the flow distribution chamber 450, the cooling medium will separate a stream into the inlet chamber 410, and vice versa, the cooling medium will separate a stream into the front-end inlet, thus realizing secondary distribution of the flow rate, thereby further improving the temperature uniformity of the battery cell module 100.

[0085] Therefore, compared with the embodiment in which the battery module 010 has inflow on three sides, the newly added diversion chamber 430 and the front-end inflow chamber 440 realize the inflow heat exchange on the fourth side of the battery module 010, and the flow distribution area better compensates for the uneven inflow flow on the three sides caused by the spatial distance, thereby further improving the temperature uniformity of the battery cell module 100 in the cooling chamber 420.

[0086] It's worth noting that, assuming the vertical direction from the top to the bottom of the top plate 540 is the direction of gravity, and considering the viscosity of the cooling medium and the effects of gravity, the fluid will exhibit a parabolic trajectory after entering through the small hole. At this point, the cooling medium flow rate in most areas of the top of the battery module 100 will be extremely low, resulting in a higher temperature at the top of the battery module 010 than in other areas. Therefore, by providing the top plate 540 with the third inlet hole 541, the cooling medium enters from the top to cool the battery module 010.

[0087] Please refer to Figure 8Specifically, the battery module 010 also includes a top plate 540, which is arranged on the top of the baffle structure 500. The top plate 540 is located below the multiple first flow inlet holes 502. The top of the top plate 540 and the baffle structure 500 form a confluence chamber 460, and the confluence chamber 460 is connected to the inlet chamber 410. The bottom of the top plate 540 and the baffle structure 500 form a cooling chamber 420; a third flow inlet hole 541 is provided on the top plate 540 to connect the cooling chamber 420 and the confluence chamber 460.

[0088] It is understood that after the cooling medium enters the confluence chamber 460 from the inlet chamber 410 through the first inlet hole 502 at the top of the first baffle 510, it disperses in the confluence chamber 460 and flows into the cooling chamber 420 through the third inlet hole 541 of the top plate 540. The cooling medium then diffuses from the top of the battery cell module 100 to the surrounding area and ultimately flows out from the second opening 322 at the bottom of the battery cell module 100. This achieves the effect of top-inlet cooling. At this time, a large flow rate flows on all six sides of the battery cell module 100, further improving the temperature uniformity of the battery cell module 100.

[0089] It is worth mentioning that the top panel 540 can be optionally curved or flat.

[0090] Specifically, taking into account various factors such as the box body 200 being too large and the flow rate being too small, the cooling medium enters the confluence chamber 460 from the first inlet holes 502 on the top of the four first baffles 510. The cooling medium converges in the central area of ​​the confluence chamber 460. Even if the flow rate is sufficient, the flow injected from the opposing first inlet holes 502 will generate vortices and affect the flow in the central area of ​​the confluence. Therefore, the top plate 540 can use a curved plate that is concave from the four corners to the center. This arrangement allows the cooling medium entering the confluence chamber 460 to flow to the central area of ​​the confluence after being affected by gravity, thereby perfectly solving the problem of low flow in the central area of ​​the confluence chamber 460 after the first inlet holes 502 are ejected, improving the cooling effect of the top inlet, and further improving the temperature uniformity.

[0091] In summary, the battery module 010 divides the accommodating cavity 400 into a cooling chamber 420 and an inlet chamber 410 by setting a baffle structure 500 with a first inlet hole 502. At least one adjacent surface 501 is provided between the cooling chamber 420 and the inlet chamber 410. The cooling medium can enter the cooling chamber 420 through the inlet chamber 410. The cooling medium entering the cooling chamber 420 can flow and evenly dissipate heat to the battery cell module 100 in at least one direction. The cooling medium after heat dissipation flows out from the cooling plate 300, thereby improving the temperature uniformity of the battery cell module 100 and improving the life of the battery module 010. At the same time, the overall process feasibility of the battery module 010 is relatively simple.

[0092] Furthermore, by adding the confluence chamber 460 and the top plate 540 , the flow heat dissipation of the fluid on the entire surface of the battery cell module 100 is further achieved.

[0093] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery module, characterized in that: include: a cooling plate, wherein a cooling medium flows through the cooling plate; A box body, wherein the cooling plate is connected to the box body to form a receiving cavity; a baffle structure, the baffle structure being disposed within the box body and dividing the accommodating chamber into a cooling chamber and an inlet chamber, at least one adjacent surface being provided between the inlet chamber adjacent to the cooling chamber, the cooling chamber and the inlet chamber being respectively in communication with the cooling plate, a plurality of first inlet holes being provided on the adjacent surface, the cooling chamber and the inlet chamber being in communication with each other through the first inlet holes; The battery cell module is arranged in the cooling chamber.

2. The battery module according to claim 1, wherein: A first flow channel and a second flow channel that are not connected are provided in the cooling plate. The first flow channel is communicated with the inlet chamber, and the second flow channel is communicated with the cooling chamber.

3. The battery module according to claim 2, characterized in that: The cooling plate includes a first flow channel plate and a cover plate that are oppositely arranged and connected, the first flow channel and the second flow channel are provided on the first flow channel plate, and the cover plate is provided with a plurality of first openings and second openings, the first flow channel is connected to the inlet chamber through the first openings, and the second flow channel is connected to the cooling chamber through the second openings; The cover plate includes a flat plate or a second flow channel plate, and the second flow channel plate is provided with flow channel structures corresponding to the first flow channel and the second flow channel.

4. The battery module according to claim 3, characterized in that: The cover plate is provided with an inlet connected to the first flow channel, and the inlet is provided with an inlet pipe connection; The cover plate is provided with an outlet communicated with the second flow channel, and an outlet pipe connection is provided at the outlet.

5. The battery module according to claim 2 or 4, characterized in that: The baffle structure includes a first baffle, the first baffle is provided with the first inlet hole, the first baffle is arranged in a rectangular structure, and the first baffle is arranged in the box; The inlet chamber is provided as a rectangular annular cavity, and the inlet chamber completely surrounds the cooling chamber, so that four adjacent surfaces are provided between the inlet chamber and the cooling chamber.

6. The battery module according to claim 5, characterized in that: The baffle structure further includes four second baffles provided in the inlet chamber, one end of the four second baffles being connected to the first baffle and the other end being connected to the inner wall of the box body; The four second baffles form a connected diversion chamber, a front inlet chamber and a flow distribution chamber, and the diversion chamber is arranged near the inlet of the first flow channel; The second baffle is provided with a plurality of second flow inlet holes so that the diversion chamber, the front end flow inlet chamber, the flow adjustment chamber and the flow inlet chamber are interconnected.

7. The battery module according to claim 1 or 4, characterized in that: The baffle structure includes a third baffle, the third baffle is provided with the first inlet hole, the third baffle is provided with a U-shaped structure, and the U-shaped ends of the third baffle are connected to the inner wall of the box; The inlet chamber is arranged as a U-shaped cavity, and the inlet chamber surrounds the cooling chamber, so that three adjacent surfaces are provided between the inlet chamber and the cooling chamber.

8. The battery module according to claim 7, characterized in that: A plurality of the first inlet holes are spaced apart along the top of the adjacent surface.

9. The battery module according to claim 8, characterized in that: The battery module further includes a top plate, which is disposed on top of the baffle structure and is located below the plurality of first inlet holes. The top of the top plate and the baffle structure form a confluence chamber, the confluence chamber is in communication with the inlet chamber, and the bottom of the top plate and the baffle structure form the cooling chamber. A third inlet hole is provided on the top plate to connect the cooling chamber and the confluence chamber.

10. The battery module according to claim 9, characterized in that: The top plate is a curved plate or a flat plate with a concave center.

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