Battery module

Abstract

Provided is a battery module (010), relating to the field of new energy. The battery module (010) comprises a box body (200), a baffle structure (400), and battery cell modules (100), wherein an accommodating cavity (011) is formed inside the box body (200), and a cooling medium is circulated in the accommodating cavity (011); the baffle structure (400) is arranged in the box body (200) and divides the accommodating cavity (011) into a plurality of cooling chambers (500) and an inflow chamber (600), the baffle structure (400) is provided with a plurality of first inflow holes (411) and second inflow holes (421), the inflow chamber (600) is in communication with the adjacent cooling chamber (500) by means of the first inflow holes (411), and the plurality of cooling chambers (500) are in communication with each other by means of the second inflow holes (421); and the battery cell modules (100) are arranged in the cooling chambers (500). By providing the baffle structure (400) to partition the accommodating cavity (011) in the box body (200), and by providing the first inflow holes (411) and the second inflow holes (421) to divide the flow of the cooling medium, the flow rate of the cooling medium in each cooling chamber (500) is rationally allocated, such that the relative flow rate between the battery cell modules (100) is not significantly affected by a spatial layout difference, thereby improving the temperature uniformity of each battery cell module (100), and prolonging the service life of the battery cell module (100).

Description

Battery module

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202411358646.7, filed on September 27, 2024, and entitled "Battery module", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the field of new energy, in particular, to a battery module. BACKGROUND

[0004] In recent years, the market has increasingly stringent requirements for vehicle endurance and intelligence, and the parallel and series connection scheme between more battery modules is undoubtedly one of the most common solutions to the problem. However, the application of more battery modules also puts high requirements on their cooling methods.

[0005] The inventor found that the existing common cooling plate can cool the battery modules in contact with it, but with the application of multi-module battery modules, there will inevitably be a situation where the temperature of the battery modules is not uniform due to the different distances from the cooling plate, thereby affecting the service life of the entire system.

[0006] DISCLOSURE

[0007] The purpose of the present disclosure includes providing a battery module that can improve the temperature uniformity of each battery module and improve the service life of the battery module.

[0008] Embodiments of the present disclosure can be implemented as follows:

[0009] The present disclosure provides a battery module, which includes a box body, a baffle structure, and a battery module. The box body forms an accommodating cavity inside, and a cooling medium flows in the accommodating cavity. The baffle structure is arranged in the box body and divides the accommodating cavity into multiple cooling chambers and an inflow chamber. The baffle structure is provided with multiple second inflow holes and first inflow holes. The cooling chamber and the adjacent inflow chamber are communicated through the first inflow hole, and multiple cooling chambers are communicated through the second inflow hole. The battery module is arranged in the cooling chamber.

[0010] Optionally, the battery module further includes a cooling plate connected with the box body and forming the accommodating cavity.

[0011] The cooling plate is provided with a first flow channel and a second flow channel that are not connected with each other. The first flow channel is communicated with the inflow chamber, and the second flow channel is communicated with the cooling chamber.

[0012] The cooling plate is further provided with an inlet and an outlet, the first flow channel is communicated with the inlet, and the second flow channel is communicated with the outlet.

[0013] Optionally, the cooling plate comprises a first flow channel plate and a cover plate connected with each other, the first flow channel plate forms the first flow channel and the second flow channel;

[0014] The cover plate is provided with a first area and a second area, the first area is provided with a plurality of first openings, the first flow channel is arranged corresponding to the first area and communicated with the inflow chamber through the first openings, the second area is provided with a plurality of second openings, the second flow channel is arranged corresponding to the second area and communicated with the cooling chamber through the second openings;

[0015] The cover plate is provided with the inlet and the outlet;

[0016] Optionally, the cover plate comprises a flat plate or a second flow channel plate, the second flow channel plate is provided with a flow channel structure corresponding to the first flow channel and the second flow channel.

[0017] Optionally, the second flow channel plate is provided with a third flow channel corresponding to the first flow channel and a fourth flow channel corresponding to the second flow channel, the second flow channel plate is provided with a plurality of first openings at the position of the third flow channel, and the second flow channel plate is provided with a plurality of second openings at the position of the fourth flow channel.

[0018] Optionally, the cover plate is further provided with a third area corresponding to the second flow channel, and the third area is not provided with the second openings.

[0019] Optionally, the first flow channel comprises a first flow section and a second flow section communicated with each other, the first flow section is communicated with the inflow chamber, the second flow section is communicated with part of the cooling chamber, and the other part of the cooling chamber is communicated with the second flow channel.

[0020] Optionally, the second flow channel comprises an outlet flow channel section, a first flow channel section and a plurality of second flow channel sections, the plurality of second flow channel sections are arranged in alignment, the first flow channel section is arranged at the left side of the plurality of second flow channel sections and communicates the plurality of second flow channel sections, and the outlet flow channel section is arranged at the left side of the first flow channel section; wherein the outlet flow channel section is the output end of the second flow channel, and the outlet flow channel section is communicated with an outlet pipe through the outlet of the cover plate.

[0021] Optionally, the baffle structure comprises a partition plate, the partition plate is arranged in the cooling chamber and divides the cooling chamber into a first cooling chamber and a second cooling chamber;

[0022] The first cooling chamber and the second cooling chamber are communicated, the first cooling chamber is communicated with the second flow channel, and the second cooling chamber is communicated with the second flow section.

[0023] Optionally, the baffle structure comprises a first baffle and a second baffle; the first baffle divides the containing cavity into a first cavity and a second cavity, the first flow hole is arranged on the first baffle, and the first cavity is the flow-in chamber;

[0024] The second baffle is connected with the first baffle, the second flow hole is arranged on the second baffle, and the second baffle is arranged in the second cavity and divides the second cavity into a plurality of cooling chambers.

[0025] Optionally, the baffle structure further comprises a third baffle, the third baffle is connected with the first baffle and the box body, the third baffle is arranged in the first cavity and divides the first cavity into a first flow-in chamber and a second flow-in chamber;

[0026] The third baffle is provided with a third flow hole, and the first flow-in chamber and the second flow-in chamber are communicated through the third flow hole.

[0027] Optionally, a plurality of second flow holes are uniformly and spacedly arranged on the top of the second baffle or the bottom of the second baffle.

[0028] Optionally, a plurality of second flow holes are distributed on adjacent second baffles in a stepped manner, and the height of the second flow hole close to the flow-in chamber is higher than the height of the second flow hole away from the flow-in chamber.

[0029] Optionally, the baffle structure further comprises a plurality of fourth baffles, and the plurality of fourth baffles are arranged in the cooling chamber and connected with the second baffle and / or the first baffle.

[0030] The plurality of fourth baffles divide the cooling chamber into an upper cooling chamber and a lower cooling chamber, and the upper cooling chamber and the lower cooling chamber are communicated and configured to arrange the battery cell module.

[0031] The beneficial effects of the embodiments of the present disclosure include, for example:

[0032] The battery module provided by the embodiments of the present disclosure divides the containing cavity in the box body by the baffle structure, divides the cooling medium by the first flow hole and the second flow hole, reasonably allocates the flow of the cooling medium in each cooling chamber, makes the relative flow between the battery cell modules not be greatly affected by the spatial layout difference, improves the temperature uniformity of each battery cell module, and improves the service life of the battery cell module. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be considered as a limitation to the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

[0034] Fig. 1 is a structural schematic diagram of a battery module in the embodiments of the present disclosure.

[0035] Fig. 2 is an exploded view of the battery module in the embodiments of the present disclosure.

[0036] Fig. 3 is a structural schematic diagram of a first flow channel plate in the embodiments of the present disclosure.

[0037] Fig. 4 is a structural schematic diagram of a cover plate in the embodiments of the present disclosure.

[0038] Fig. 5 is a schematic diagram of the structure of a box body and a baffle in a first embodiment of the present disclosure.

[0039] Fig. 6 is a schematic diagram of the structure of a box body and a baffle in a second embodiment of the present disclosure.

[0040] Fig. 7 is a structural schematic diagram of a cover plate in the first embodiment of the present disclosure.

[0041] Fig. 8 is a schematic diagram of the structure of a box body and a baffle in a third embodiment of the present disclosure.

[0042] Fig. 9 is a schematic diagram of the structure of a box body and a baffle in a fourth embodiment of the present disclosure.

[0043] Icon: 010 - battery module; 100 - cell module; 200 - case; 210 - case body; 220 - end cover; 300 - cooling plate; 301 - first flow channel plate; 310 - first flow channel; 311 - first flow section; 312 - second flow section; 320 - second flow channel; 321 - outlet flow channel section; 322 - first flow channel section; 323 - second flow channel section; 302 - cover plate; 340 - first area; 341 - first opening; 350 - second area; 351 - second opening; 360 - third area; 370 - inlet; 371 - inlet pipe joint; 380 - outlet; 381 - outlet pipe joint; 400 - baffle structure; 410 - first baffle; 411 - first inlet flow hole; 420 - second baffle; 421 - second inlet flow hole; 430 - third baffle; 431 - third inlet flow hole; 440 - fourth baffle; 441 - fourth inlet flow hole; 450 - partition plate; 451 - fifth inlet flow hole; 011 - accommodating cavity; 500 - cooling chamber; 510 - first cooling chamber; 511 - first upper layer cooling chamber; 520 - second cooling chamber; 521 - second upper layer cooling chamber; 530 - third cooling chamber; 531 - third upper layer cooling chamber; 540 - first second cooling chamber; 541 - first upper layer second cooling chamber; 550 - second second cooling chamber; 551 - second upper layer second cooling chamber; 560 - third second cooling chamber; 561 - third upper layer second cooling chamber; 600 - inlet flow chamber; 610 - first inlet flow chamber; 620 - second inlet flow chamber. DETAILED DESCRIPTION

[0044] In order to make the objects, technical solutions, and advantages of the embodiments of the present disclosure clearer, the following will be combined with the accompanying drawings for the embodiments of the present disclosure to make a clear and complete description of the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed present disclosure, but only represents selected embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative labor are within the scope of protection of the present disclosure.

[0046] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the present disclosure, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0048] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0049] It should be noted that the features in the embodiments of the present disclosure can be combined with each other without conflict.

[0050] Please refer to FIG. 1 and FIG. 2, the present embodiment provides a battery module 010, the battery module 010 includes a plurality of cooling chambers 500, a plurality of battery cell modules 100 are individually placed in each cooling chamber 500, cooling medium enters the cooling chamber 500 adjacent to the flow-in chamber 600 from the first flow-in hole 411, and the cooling medium flows through the second flow-in hole 421 in the plurality of cooling chambers 500 to individually cool the single battery cell module 100, thereby improving the temperature uniformity of each battery cell module 100. Of course, in other embodiments, more than two battery cell modules 100 can also be placed in a single cooling chamber 500.

[0051] At the same time, all battery cell modules 100 are placed in the cooling medium, and the heat dissipation mode changes from solid indirect heat conduction to liquid convection, thereby avoiding the space problem of the cooling plate 300.

[0052] Please refer to FIG. 1 and FIG. 2, the present embodiment provides a battery module 010, including a box body 200, a baffle structure 400 and a battery cell module 100; the box body 200 forms an accommodating cavity 011 inside, and the accommodating cavity 011 flows through cooling medium; the baffle structure 400 is arranged in the box body 200 and divides the accommodating cavity 011 into a plurality of cooling chambers 500 and a flow-in chamber 600, the baffle structure 400 is provided with a plurality of first flow-in holes 411 and second flow-in holes 421, the cooling chamber 500 is communicated with the adjacent flow-in chamber 600 through the first flow-in hole 411, and the plurality of cooling chambers 500 are communicated through the second flow-in hole 421; the battery cell module 100 is arranged in the cooling chamber 500.

[0053] It can be understood that by setting the baffle structure 400 to divide the containing cavity 011 in the box 200, and by setting the first flow inlet hole 411 and the second flow inlet hole 421 to divide the cooling medium, the flow of the cooling medium in each cooling chamber 500 is reasonably distributed, so that the relative flow between the battery cell modules 100 in each cooling chamber 500 is not greatly affected by the difference in spatial layout, improving the uniformity of each battery cell module 100 and improving the service life of the battery cell module 100.

[0054] Please refer to FIG. 2, in the embodiment, the battery module 010 includes the battery cell module 100.

[0055] Among them, the battery cell module 100 is arranged in the cooling chamber 500.

[0056] Please refer to FIG. 1 and FIG. 2, in the embodiment, the battery module 010 includes the box 200.

[0057] Among them, the box 200 includes the box body 210 and the end cover 220, the top of the box body 210 is connected with the end cover 220, and the bottom of the box body 210 is connected with the cooling plate 300, so that the box body 210, the end cover 220 and the cooling plate 300 enclose the containing cavity 011.

[0058] Optionally, the box body 210 and the end cover 220 can be formed respectively, and then fixedly connected and sealed; wherein the fixed connection mode includes welding, clamping, bonding and the like. Of course, the box body 210 and the end cover 220 can also be an integrally formed structure.

[0059] Please refer to FIG. 2-FIG. 4, in the embodiment, the battery module 010 includes the cooling plate 300.

[0060] In the embodiment, the cooling plate 300 includes the first flow channel plate 301 and the cover plate 302 which are oppositely arranged and connected.

[0061] Optionally, the first flow channel plate 301 and the cover plate 302 can be a split structure, or an integrally formed structure.

[0062] Optionally, the cover plate 302 can be a flat plate. Of course, the cover plate 302 can also be a second flow channel plate, and the second flow channel plate is provided with flow channel structures corresponding to the first flow channel 310 and the second flow channel 320; optionally, the second flow channel plate is provided with a third flow channel corresponding to the first flow channel 310 and a fourth flow channel corresponding to the second flow channel 320, and the second flow channel plate is provided with a plurality of first openings 341 at the position of the third flow channel, and a plurality of second openings 351 at the position of the fourth flow channel. It can be understood that the flow channel formed in this way has a larger flow of cooling medium and a higher cooling efficiency.

[0063] In the embodiment, the first flow channel plate 301 is provided with the first flow channel 310 and the second flow channel 320, the first flow channel 310 and the second flow channel 320 are filled with cooling medium, the first flow channel 310 and the second flow channel 320 are not connected, the first flow channel 310 is communicated with the inflow chamber 600, and the second flow channel 320 is communicated with the cooling chamber 500. It can be understood that the first flow channel 310 and the second flow channel 320 are not connected, but can be indirectly communicated through the inflow chamber 600 and the cooling chamber 500.

[0064] In the embodiment, referring to FIG. 3, the first flow channel 310 includes the first flow section 311 and the second flow section 312 which are communicated, the first flow section 311 is communicated with the inflow chamber 600, the second flow section 312 is communicated with part of the cooling chamber 500, and the other part of the cooling chamber 500 is communicated with the second flow channel 320.

[0065] Optionally, referring to FIG. 3, the first flow section 311 and the second flow section 312 are arranged according to the actual situation of the inflow chamber 600. The first flow section 311 can be an L-shaped flow channel structure, and the first flow section 311 is arranged along the corner of the first flow channel plate 301. The first flow section 311 is the input end of the first flow channel 310, and the first flow section 311 is communicated with the inlet pipe through the inlet of the cover plate 302. The second flow section 312 can be a flow channel structure composed of multiple curved structures, or a straight flow channel section structure.

[0066] In the embodiment, referring to FIG. 3, the second flow channel 320 includes the outlet flow channel section 321, the first flow channel section 322 and multiple second flow channel sections 323, the multiple second flow channel sections 323 are arranged in alignment, the first flow channel section 322 is arranged on the left side of the multiple second flow channel sections 323 and communicates the multiple second flow channel sections 323, and the outlet flow channel section 321 is arranged on the left side of the first flow channel section 322. The outlet flow channel section 321 is the output end of the second flow channel 320, and the outlet flow channel section 321 is communicated with the outlet pipe 381 through the outlet 380 of the cover plate 302. Of course, in other embodiments, the second flow channel 320 can also be a flow channel structure composed of multiple curved structures.

[0067] In the embodiment, referring to FIG. 4, the cover plate 302 is provided with the first region 340 and the second region 350, the first region 340 is provided with multiple first openings 341, the first flow channel 310 is arranged corresponding to the first region 340 and communicated with the inflow chamber 600 through the first openings 341, the second region 350 is provided with multiple second openings 351, and the second flow channel 320 is arranged corresponding to the second region 350 and communicated with the cooling chamber 500 through the second openings 351.

[0068] The first region 340 on the cover plate 302 corresponds to the first flow channel section 322 and the second flow channel section 323, and the second region 350 corresponds to the second flow channel 320.

[0069] In this embodiment, the cover plate 302 is provided with an inlet 370 opposite the input end of the first flow section 311, the inlet 370 is communicated with the first flow channel 310, and the inlet 370 is provided with an inlet pipe joint 371; the cover plate 302 is provided with an outlet 380 opposite the output end of the second flow channel 320, the outlet 380 is communicated with the second flow channel 320, and the outlet 380 is provided with an outlet pipe joint 381.

[0070] Optionally, referring to FIG. 7, the cover plate 302 is further provided with a third region 360, the third region 360 corresponds to the second flow channel 320, and the third region 360 is not provided with the second opening 351. It can be understood that after the cooling medium enters the cooling chamber 500 from the inlet flow chamber 600 through the first inlet flow hole 411, the cooling medium flows in each first cooling chamber and second cooling chamber through the second inlet flow hole 421. Since the third region 360 is not provided with the second opening 351, the cooling medium in the first cooling chamber corresponding to the third region 360 can only flow into the first cooling chamber behind the second region 350, so that the flow of the cooling medium between the plurality of first cooling chambers becomes a series relationship, and as the cooling medium flows, the temperature of the cooling medium in the first cooling chamber corresponding to the second region 350 increases, but the flow of the cooling medium converges, thereby improving the uniformity of the battery cell module 100 in the first cooling chamber.

[0071] In this embodiment, the battery module 010 includes a baffle structure 400.

[0072] The baffle structure 400 is arranged in the box body 200 and divides the containing cavity 011 into a plurality of cooling chambers 500 and an inlet flow chamber 600, the baffle structure 400 is provided with a plurality of first inlet flow holes 411 and second inlet flow holes 421, the plurality of cooling chambers 500 are communicated through the second inlet flow holes 421, and the inlet flow chamber 600 is communicated with the adjacent cooling chamber 500 through the first inlet flow hole 411.

[0073] In this embodiment, referring to FIG. 5, the baffle structure 400 includes a first baffle 410, a second baffle 420, and a partition plate 450; the first baffle 410 divides the containing cavity 011 into a first cavity and a second cavity, the first inlet flow hole 411 is arranged on the first baffle 410, and the first cavity is the inlet flow chamber 600; the second baffle 420 is connected with the first baffle 410, the second inlet flow hole 421 is arranged on the second baffle 420, and the second baffle 420 is arranged in the second cavity and divides the second cavity into a plurality of cooling chambers 500.

[0074] In the embodiment, the inflow chamber 600 is located at the peripheral position of the box body 210, and the cooling medium flows from the inflow chamber 600 to the cooling chamber 500 at the intermediate position.

[0075] Of course, in other embodiments, the position of the inflow chamber 600 can be set as required. The inflow chamber 600 can also be located at the intermediate position of the box body 210, and the cooling chamber 500 is located at the periphery of the inflow chamber 600, and the cooling medium flows from the inflow chamber 600 to the cooling chamber 500 at the periphery; wherein the positions of the inflow channel section 370 and the outflow channel 380 are also adapted to change; wherein the baffle structure 400 also changes, such as a square, a circle, and the like. Correspondingly, the inflow chamber 600 is located at the intermediate position, and a plurality of cooling chambers 500 can be arranged around the outer periphery of the inflow chamber 600, so that the cooling chambers 500 can be arranged front and back and left and right.

[0076] Optionally, referring to FIGS. 5 and 6, the partition plate 450 is arranged in the cooling chamber 500 and divides the cooling chamber 500 into a first cooling chamber and a second cooling chamber; the fifth inflow hole 451 is arranged on the partition plate 450 to communicate the first cooling chamber and the second cooling chamber, the first cooling chamber communicates with the second flow channel 320, and the second cooling chamber communicates with the second flow section 312.

[0077] Optionally, the number of the first cooling chamber and the second cooling chamber is not limited to three, and can be set as required; the cooling chamber 500 can also be arranged in multiple rows, such as one row, two rows, or three rows, etc.

[0078] It is worth mentioning that the first baffle 410 separates the inflow chamber 600 and the cooling chamber 500, so that at least one adjacent surface is arranged between the inflow chamber 600 and the cooling chamber 500, and the first inflow hole 411 is arranged on the adjacent surface. It can be understood that increasing the adjacent surface between the inflow chamber 600 and the cooling chamber 500 can increase the inflow surface of the cooling medium of the cooling chamber 500, and can increase the temperature uniformity of the battery cell module 100 in the cooling chamber 500.

[0079] Optionally, referring to FIGS. 5 and 6, the first baffle 410 can be an L-shaped baffle, and the first baffle 410 divides the containing cavity 011 into a second cavity of a rectangular structure and a first cavity of an L-shaped structure. The first baffle 410 arranged in this way makes two adjacent surfaces exist between the first cavity and the second cavity. It can be understood that the inflow chamber 600 can realize two-surface inflow to the cooling chamber 500 through the first inflow holes 411 on the two adjacent surfaces.

[0080] Optionally, the first baffle 410 can also be a single-plate structure, and the first baffle 410 of the single-plate structure makes one adjacent surface exist between the first cavity and the second cavity; then the inflow chamber 600 can realize single-surface inflow to the cooling chamber 500 through the first inflow hole 411 on the adjacent surface.

[0081] Optionally, the first baffle 410 can also be a U-shaped baffle, and the U-shaped first baffle 410 allows three adjacent surfaces between the first cavity and the second cavity; then the flow-in chamber 600 can realize three-surface flow-in to the cooling chamber 500 through the first flow-in holes on the three adjacent surfaces.

[0082] Optionally, the first baffle 410 can also be a rectangular annular baffle structure 400, and the rectangular annular baffle structure 400 allows four adjacent surfaces between the first cavity and the second cavity; then the flow-in chamber 600 can realize four-surface flow-in to the cooling chamber 500 through the first flow-in holes on the four adjacent surfaces. Such arrangement can further improve the temperature uniformity of the battery cell module 100.

[0083] In the embodiment, the plurality of first flow-in holes 411 are uniformly and spacedly arranged on the top of the first baffle 410. The plurality of second flow-in holes 421 are uniformly and spacedly arranged on the top of the second baffle 420.

[0084] Optionally, the plurality of second flow-in holes 421 are uniformly and spacedly arranged on the bottom of the second baffle 420.

[0085] Optionally, referring to FIG. 6, the plurality of second flow-in holes 421 can also be distributed in a stepped manner on the adjacent second baffles 420, and the second flow-in holes 421 close to the flow-in chamber 600 are higher than the second flow-in holes 421 away from the flow-in chamber 600. It can be understood that such arrangement can avoid uneven flow of the cooling medium between the plurality of rear flow-in chambers 600; by adjusting the height of the second flow-in holes 421 on each second baffle 420 to be distributed in a stepped manner, the flow of the cooling medium of the plurality of second flow-in chambers 620 is compensated by the height difference between the second flow-in holes 421 of the adjacent second baffles 420, thereby further improving the temperature uniformity of the battery cell module 100 in each cooling chamber 500.

[0086] Optionally, referring to FIGS. 5 and 6, the baffle structure 400 can further include a third baffle 430, the third baffle 430 is connected with the first baffle 410 and the box body 200, the third baffle 430 is arranged in the first cavity and divides the first cavity into a first flow-in chamber 610 and a second flow-in chamber 620; the third baffle 430 is provided with third flow-in holes 431 uniformly and spacedly arranged thereon, and the first flow-in chamber 610 and the second flow-in chamber 620 are communicated through the third flow-in holes 431.

[0087] It can be understood that the third baffle 430 with the third flow-in holes 431 plays a role of flow channel distribution and flow distribution for the flow-in chamber 600, thereby further improving the temperature uniformity between the battery cell modules 100.

[0088] Optionally, referring to FIG. 9, the baffle structure 400 can further include a plurality of fourth baffles 440 arranged in the cooling chamber 500 and connected with the second baffles 420 and / or the first baffles 410; the plurality of fourth baffles 440 divide the cooling chamber 500 into an upper cooling chamber and a lower cooling chamber, and the fourth baffles 440 are provided with fourth flow holes 441 arranged uniformly and at intervals, and the upper cooling chamber and the lower cooling chamber are connected through the fourth flow holes 441 and configured to arrange the battery cell modules 100.

[0089] It can be understood that the cooling chamber 500 is divided into the upper cooling chamber and the lower cooling chamber, the number of the battery cell modules 100 in the battery module 010 is increased, the capacity of the battery module 010 is increased, and the relative flow among the multi-layer battery cell modules 100 is not greatly affected by the difference in spatial layout by reasonably distributing the flow.

[0090] In the embodiment, referring to FIG. 5, the battery module 010 includes a box body 200, a cooling plate 300, and a baffle structure 400. The box body 200 is connected with the cooling plate 300 to form a containing cavity 011.

[0091] In the embodiment, the cooling plate 300 includes a first flow channel plate 301 and a cover plate 302 arranged oppositely and connected.

[0092] Optionally, the first flow channel plate 301 is provided with a first flow channel 310 and a second flow channel 320; the first flow channel 310 includes a first flow section 311 and a second flow section 312 connected in communication, the first flow section 311 is an L-shaped flow channel structure, and the first flow section 311 is arranged along a corner of the first flow channel plate 301; the first flow section 311 is an input end of the first flow channel 310, and the first flow section 311 is connected with the inlet pipe through the inlet of the cover plate 302. The second flow section 312 can be a flow channel structure composed of a plurality of curved structures. The second flow channel 320 includes an outlet flow channel section 321, a first flow channel section 322, and a plurality of second flow channel sections 323, the plurality of second flow channel sections 323 are arranged in alignment, the first flow channel section 322 is arranged on the left side of the plurality of second flow channel sections 323 and connects the plurality of second flow channel sections 323 in communication, and the outlet flow channel section 321 is arranged on the left side of the first flow channel section 322. The outlet flow channel section 321 is an output end of the second flow channel 320, and the outlet flow channel section 321 is connected with the outlet pipe 381 through the outlet 380 of the cover plate 302.

[0093] Optionally, the cover plate 302 is provided with a first area 340, a second area 350, and an outlet 380; the first area 340 is provided with a plurality of first openings 341, and the second area 350 is provided with a plurality of second openings 351; the first area 340 is arranged corresponding to the first flow channel section 322 and the second flow channel section 323 on the first flow channel plate 301, and the second area 350 is arranged corresponding to the second flow channel 320.

[0094] In the embodiment, the baffle structure 400 comprises a first baffle 410, a second baffle 420, a third baffle 430 and a partition plate 450.

[0095] Optionally, the first baffle 410 is an L-shaped baffle, which divides the accommodating cavity 011 into a second cavity of a rectangular structure and a first cavity of an L-shaped structure. The first baffle 410 is arranged in such a way that there are two adjacent surfaces between the first cavity and the second cavity. A plurality of first flow holes 411 are uniformly arranged on the top of the first baffle 410.

[0096] Optionally, two second baffles 420 are arranged in parallel in the second cavity, which respectively divide the second cavity into three cooling chambers 500 of a rectangular structure. A plurality of second flow holes 421 are uniformly arranged on the top of the second baffle 420. The partition plate 450 is arranged in the cooling chamber 500, which divides the cooling chamber 500 into three first cooling chambers and three second cooling chambers. The partition plate 450 is provided with fifth flow holes 451 arranged uniformly and spaced apart, and the three first cooling chambers and the three second cooling chambers are communicated through the fifth flow holes 451.

[0097] The three first cooling chambers are a first cooling chamber 510, a second cooling chamber 520 and a third cooling chamber 530, respectively. The three second cooling chambers are a first cooling chamber 540, a second cooling chamber 550 and a third cooling chamber 560, respectively.

[0098] Optionally, the third baffle 430 is arranged in the first cavity and corresponds to the partition plate 450. The third baffle 430 divides the first cavity into a first flow chamber 610 and a second flow chamber 620. The third baffle 430 is provided with third flow holes 431 arranged uniformly and spaced apart along the third baffle 430.

[0099] According to the battery module 010 provided in the embodiment, the working principle is as follows:

[0100] The first section of the flow field: the cooling medium enters the first flow section 311 of the first flow channel 310 from the inlet pipe 371. The cooling medium in the first flow section 311 first enters the first flow chamber 610 through the first opening 341. After the cooling medium enters the first flow chamber 610, most of the fluid will enter the second flow chamber 620 through the third flow holes 431 on the third baffle 430, and the rest of the fluid will enter the first cooling chamber 510 through the first flow holes 411.

[0101] Second stage flow field: the cooling medium continues to flow along the first flow section 311, enters the second flow inlet chamber 620 through a small number of first openings 341; then the flow of the cooling medium is divided into two directions; one of which continues to flow along the first flow section 311 and enters the second flow inlet chamber 620 through the first openings 341, and the other part of the fluid enters the second flow section 312 through the first openings 341 and enters the first, second and third second cooling chambers 540, 550 and 560, respectively.

[0102] Third stage flow field: the cooling medium enters the second flow inlet chamber 620 and enters the first, second and third second cooling chambers 540, 550 and 560 through the first flow holes 411 on the first baffle plate 410 in sequence; among them, the first flow holes 411 on the first baffle plate 410 that forms the first second cooling chamber 540 are the most, so most of the fluid enters the first second cooling chamber 540.

[0103] Fourth stage flow field: due to space arrangement and other reasons, the flow of the cooling medium entering the first, second and third second cooling chambers 540, 550 and 560 is not uniform, at this time, the cooling medium will be distributed again through the second flow holes 421 on the top of the second baffle plate 420 adjacent to the three second cooling chambers, so as to further improve the temperature uniformity of the battery cell module 100 in the three second cooling chambers.

[0104] Fifth stage flow field: at this time, the cooling medium in the first second cooling chamber 540 enters the first first cooling chamber 510 through the second flow holes 421 on the adjacent second baffle plate 420, and converges with the cooling medium flowing from the first flow inlet chamber 610; at the same time, the second second cooling chamber 550 enters the second first cooling chamber 520 through the fifth flow holes 451 on the adjacent partition plate 450, and the third second cooling chamber 560 enters the third first cooling chamber 530 through the fifth flow holes 451 on the adjacent partition plate 450. Due to space arrangement and other reasons, the flow of the cooling medium in the first, second and third first cooling chambers 510, 520 and 530 is not uniform, at this time, the cooling medium will be distributed again through the second flow holes 421 on the top of the second baffle plate 420 adjacent to the three first cooling chambers, so as to further improve the temperature uniformity of the battery cell module 100 in the three first cooling chambers.

[0105] Sixth stage flow field: finally, the first, second and third first cooling chambers 510, 520 and 530 flow into the second flow channel 320 through the second openings 351 at the bottom of the battery cell module 100, and flow out from the outlet pipe 381 along the second flow channel 320. At this point, the entire cooling medium flow ends.

[0106] The present embodiment reasonably distributes the flow by arranging the baffle structure 400 between the battery modules 010 and the first flow inlet hole 411 and the second flow inlet hole 421, so that the relative flow between the battery modules 010 is not greatly affected by the spatial layout difference.

[0107] The battery module 010 of the present embodiment is consistent with the structure of the battery module 010 in the above embodiment.

[0108] The battery module 010 of the present embodiment is different from the above embodiment in that the height of the second flow inlet hole 421 on the second baffle 420 is different.

[0109] In the present embodiment, please refer to FIG. 6, the plurality of second flow inlet holes 421 on the adjacent second baffle 420 between the first second cooling chamber 540, the second second cooling chamber 550 and the third second cooling chamber 560 are distributed in a stepped manner, and the height of the second flow inlet hole 421 close to the flow inlet chamber 600 is higher than the height of the second flow inlet hole 421 away from the flow inlet chamber 600.

[0110] Optionally, the height of the second flow inlet hole 421 on the adjacent second baffle 420 between the first second cooling chamber 540 and the second second cooling chamber 550 is higher than the height of the second flow inlet hole 421 on the adjacent second baffle 420 between the second second cooling chamber 550 and the third second cooling chamber 560. Among them, the height of the first flow inlet hole 411 on the adjacent first baffle 410 of the first second cooling chamber 540 is higher than the height of the second flow inlet hole 421 on the adjacent second baffle 420 of the first second cooling chamber 540.

[0111] It can be understood that the cooling medium entering the second flow inlet chamber 620 has the largest flow rate into the first second cooling chamber 540 because the second flow inlet chamber 620 is closest to the first second cooling chamber 540, and the first flow inlet hole 411 on the first baffle 410 forming the first second cooling chamber 540 has the largest height.

[0112] By setting the second flow inlet hole 421 with different heights and stepped layout, the height of the second flow inlet hole 421 between the first second cooling chamber 540 and the second second cooling chamber 550 is lower than the height of the fifth flow inlet hole 451 between the first second cooling chamber 540 and the first first cooling chamber 510, so that more cooling medium can flow into the second second cooling chamber 550 and the first first cooling chamber 510.

[0113] The second flow holes 421 on the second baffles 420 are arranged in a stepped manner in the embodiment, and the flow of the cooling medium between the second cooling chambers is compensated by the height difference of the second flow holes 421 on the adjacent second baffles 420, so that the temperature uniformity of the battery cell modules 100 in the cooling chambers 500 is further improved.

[0114] The battery module 010 in the embodiment has the same structure as the battery module 010 in the above-mentioned embodiment, but the height of the second flow holes 421 on the second baffles 420 is different. The cooling medium tends to flow out of the second cooling chamber 520 because the second cooling chamber 520 is closer to the outlet pipe 381, so the flow of the second cooling chamber 520 is relatively larger than the flows of the first cooling chamber 510 and the third cooling chamber 530.

[0115] Therefore, the battery module 010 in the embodiment is different from the battery module 010 in the above-mentioned embodiment in that: 1, the cover plate 302 of the cooling plate 300 is provided with a third region 360; 2, the second flow holes 421 between the three first cooling chambers are arranged at the bottom of the second baffles 420.

[0116] In the embodiment, referring to FIGS. 7 and 8, the cover plate 302 is provided with a first region 340, a second region 350 and a third region 360; the first region 340 is arranged corresponding to the first flow channel section 322 and the second flow channel section 323 on the first flow channel plate 301, and a plurality of first openings 341 are arranged on the first region 340; the second region 350 is arranged corresponding to the second flow channel 320, and a plurality of second openings 351 are arranged on the second region 350; the third region 360 is arranged corresponding to the second flow channel 320, and no second opening 351 is arranged on the third region 360.

[0117] Optionally, the first region 340 corresponds to the inlet flow chamber 600, the first cooling chamber 510, the second cooling chamber 540, the third cooling chamber 530 and the fourth cooling chamber 560; the second region 350 corresponds to the second cooling chamber 520; and the third region 360 corresponds to the first cooling chamber 510 and the second cooling chamber 520.

[0118] It can be understood that, since the third region 360 is not provided with an opening, the cooling medium in the first cooling chamber 510 and the second cooling chamber 520 corresponding to the third region 360 can only flow into the third cooling chamber 530 in sequence, and the cooling medium flows into the second flow channel 320 from the third cooling chamber 530 through the second opening 351.

[0119] In this way, the flow of the cooling medium between the first cooling chamber 510, the second first cooling chamber 520 and the third first cooling chamber 530 is in series, and as the cooling medium flows, the temperature of the cooling medium in the third first cooling chamber 530 corresponding to the second region 350 increases, but the flow of the cooling medium converges, thereby improving the temperature uniformity of the battery cell module 100 in the first cooling chamber 510, the second first cooling chamber 520 and the third first cooling chamber 530.

[0120] The battery module 010 of the present embodiment is the same as the battery module 010 of the initial embodiment in structure.

[0121] The battery module 010 of the present embodiment is different from the battery module 010 of the initial embodiment in that the baffle structure 400 of the present embodiment includes a fourth baffle 440.

[0122] In the present embodiment, referring to FIG. 9, the baffle structure 400 can further include a plurality of fourth baffles 440, which are arranged in the cooling chamber 500 and connected with the second baffle 420 and the first baffle 410; the plurality of fourth baffles 440 divide the cooling chamber 500 into an upper cooling chamber and a lower cooling chamber, and the fourth baffles 440 are provided with fourth inflow holes 441 arranged uniformly and at intervals, and the upper cooling chamber and the lower cooling chamber are connected through the fourth inflow holes 441 and configured to arrange the battery cell module 100.

[0123] The fourth baffle 440 is located below the first inflow hole 411 and the second inflow hole 421, and the fourth baffle 440 divides the first cooling chamber 510, the second first cooling chamber 520 and the third first cooling chamber 530 into an upper cooling chamber and a lower cooling chamber, and divides the first second cooling chamber 540, the second second cooling chamber 550 and the third second cooling chamber 560 into an upper cooling chamber and a lower cooling chamber.

[0124] The battery module 010 provided by the present embodiment has the following working principle:

[0125] The first section of the flow field: the cooling medium enters the first section 311 of the first flow channel 310 from the inlet pipe 371, and the cooling medium in the first section 311 first enters the first inflow chamber 610 through the first opening 341; after the cooling medium enters the first inflow chamber 610, most of the fluid will enter the second inflow chamber 620 through the third inflow hole 431 on the third baffle 430, and the remaining fluid will enter the first upper cooling chamber 511 through the first inflow hole 411.

[0126] Second stage flow field: the cooling medium continues to flow along the first flow section 311, enters the second flow section 312 through the first opening 341, and then the flow is divided into two directions; one part of the fluid continues to flow along the first flow section 311 and enters the second flow section 312 through the first opening 341, and the other part of the fluid enters the second flow section 312 through the first opening 341 and enters the lower first second cooling chamber 540, the lower second second cooling chamber 550, and the lower third second cooling chamber 560.

[0127] Third stage flow field: the cooling medium enters the second flow section 312, and then enters the first upper second cooling chamber 541, the second upper second cooling chamber 551, and the third upper second cooling chamber 561 through the first flow hole 411 on the first baffle plate 410; the first lower second cooling chamber, the second lower second cooling chamber, and the third lower second cooling chamber enter the first upper second cooling chamber 541, the second upper second cooling chamber 551, and the third upper second cooling chamber 561 through the fourth flow hole 441 on the fourth baffle plate 440, respectively. Since the first flow hole 411 on the first baffle plate 410 that forms the first second cooling chamber 540 has the most, most of the fluid enters the first upper second cooling chamber 541.

[0128] Fourth stage flow field: due to space arrangement and other reasons, the flow of the cooling medium entering the first upper second cooling chamber 541, the second upper second cooling chamber 551, and the third upper second cooling chamber 561 is not uniform, at this time, the cooling medium will be distributed again through the second flow hole 421 on the top of the second baffle plate 420 adjacent to the three upper second cooling chambers, so as to further improve the temperature uniformity of the battery cell module 100 in the three upper second cooling chambers.

[0129] Fifth stage flow field: at this time, the cooling medium in the first upper second cooling chamber 541 enters the first upper first cooling chamber 511 through the second flow hole 421 on the adjacent second baffle plate 420, and converges with the cooling medium flowing from the first flow chamber 610. At the same time, the second upper second cooling chamber 551 enters the second upper first cooling chamber 521 through the adjacent second flow hole 421, and the third upper second cooling chamber 561 enters the third upper first cooling chamber 531 through the adjacent second flow hole 421.

[0130] Due to space arrangement and other reasons, the flow of the cooling medium in the first upper first cooling chamber 511, the second upper first cooling chamber 521, and the third upper first cooling chamber 531 is not uniform, at this time, the cooling medium will be distributed again through the second flow hole 421 on the top of the second baffle plate 420 adjacent to the three upper first cooling chambers, so as to further improve the temperature uniformity of the battery cell module 100 in the three upper first cooling chambers.

[0131] The sixth flow field: finally, the first upper layer first cooling chamber 511, the second upper layer first cooling chamber 521 and the third upper layer first cooling chamber 531 enter the first lower layer first cooling chamber, the second lower layer first cooling chamber and the third lower layer first cooling chamber respectively through the fourth inflow hole 441 of the fourth baffle 440. The first lower layer first cooling chamber, the second lower layer first cooling chamber and the third lower layer first cooling chamber flow into the second flow channel 320 through the second opening 351 at the bottom of the battery cell module 100, and flow out from the outlet pipe 381 along the second flow channel 320. At this point, the entire cooling medium flow is completed.

[0132] The embodiment divides the cooling chamber 500 into at least two layers by arranging the fourth baffle 440, realizes the series-parallel flow of the fluid among the multiple layers of modules, and reasonably distributes the flow, so that the relative flow among the battery cell modules 100 is not greatly affected by the difference in spatial layout.

[0133] In summary, the battery cell module provided in the embodiment of the present disclosure divides the accommodating cavity 011 in the box 200 by arranging the baffle structure 400, and divides the cooling medium by arranging the first inflow hole 411 and the second inflow hole 421, reasonably distributes the flow of the cooling medium in each cooling chamber 500, so that the relative flow among the battery cell modules 100 is not greatly affected by the difference in spatial layout, improves the temperature uniformity of each battery cell module 100, and improves the service life of the battery cell module 100.

[0134] Further, the baffle structure 400 and the cooling plate 300 in combination can further make the relative flow among the battery cell modules 100 more uniform by changing the flow size among the multiple cooling chambers 500 and the series-parallel mode of the fluid flow, improve the temperature uniformity, and improve the service life of the battery cell module 100.

[0135] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any changes or replacements that can be easily thought of by those skilled in the art within the technical range disclosed in the present disclosure should be covered in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims. Industrial applicability

[0136] In summary, the battery module provided in the embodiment of the present disclosure can improve the temperature uniformity of each battery cell module and improve the service life of the battery cell module.

Claims

1. A battery module, characterized by, The battery module comprises: a box, which forms an accommodating cavity inside, and in which cooling medium can flow; a baffle structure, which is arranged in the box and separates the accommodating cavity into multiple cooling chambers and an inflow chamber, and is provided with multiple first inflow holes and second inflow holes, the cooling chambers and the adjacent inflow chambers are communicated through the first inflow holes, and multiple cooling chambers are communicated through the second inflow holes; a battery cell module, which is arranged in the cooling chamber.

2. The battery module of claim 1, wherein, The battery module further comprises a cooling plate, which is connected with the box and forms the accommodating cavity; the cooling plate is provided with a first flow channel and a second flow channel which are not connected with each other, the first flow channel is communicated with the inflow chamber, and the second flow channel is communicated with the cooling chamber; the cooling plate is further provided with an inlet and an outlet, the first flow channel is communicated with the inlet, and the second flow channel is communicated with the outlet.

3. The battery module of claim 2, wherein, The cooling plate comprises a first flow channel plate and a cover plate which are connected with each other, the first flow channel plate forms the first flow channel and the second flow channel; the cover plate is provided with a first area and a second area, the first area is provided with multiple first openings, the first flow channel is arranged corresponding to the first area and is communicated with the inflow chamber through the first openings, the second area is provided with multiple second openings, the second flow channel is arranged corresponding to the second area and is communicated with the cooling chamber through the second openings; the cover plate is provided with the inlet and the outlet.

4. The battery module of claim 3, wherein, 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.

5. The battery module of claim 4, wherein, The second flow channel plate is provided with a third flow channel corresponding to the first flow channel and a fourth flow channel corresponding to the second flow channel, the second flow channel plate is provided with multiple first openings at the position of the third flow channel, and the second flow channel plate is provided with multiple second openings at the position of the fourth flow channel.

6. The battery module according to claims 3-5, characterized in that, The cover plate is further provided with a third area corresponding to the second flow channel, and the third area is not provided with the second openings.

7. The battery module of claim 6, wherein, The first flow channel comprises a first flow section and a second flow section which are communicated with each other, the first flow section is communicated with the inflow chamber, and the second flow section is communicated with part of the cooling chamber, and the other part of the cooling chamber is communicated with the second flow channel.

8. The battery module according to claim 6 or 7, characterized in that The second flow channel comprises an outlet flow channel section, a first flow channel section and multiple second flow channel sections, the multiple second flow channel sections are arranged in alignment, the first flow channel section is arranged on the left side of the multiple second flow channel sections and communicates the multiple second flow channel sections, and the outlet flow channel section is arranged on the left side of the first flow channel section; wherein the outlet flow channel section is the output end of the second flow channel, and the outlet flow channel section is communicated with an outlet pipe through the outlet of the cover plate.

9. The battery module according to claim 7 or 8, characterized in that The baffle structure comprises a partition plate, which is arranged in the cooling chamber and separates the cooling chamber into a first cooling chamber and a second cooling chamber; the first cooling chamber and the second cooling chamber are communicated, the first cooling chamber is communicated with the second flow channel, and the second cooling chamber is communicated with the second flow section.

10. The battery module of any one of claims 1-9, wherein, The baffle structure comprises a first baffle and a second baffle; the first baffle divides the accommodating cavity into a first cavity and a second cavity, the first inlet hole is arranged on the first baffle, and the first cavity is the inlet chamber; The second baffle is connected with the first baffle, the second inlet hole is arranged on the second baffle, the second baffle is arranged in the second cavity and divides the second cavity into a plurality of cooling chambers.

11. The battery module of claim 10, wherein, The baffle structure further comprises a third baffle, the third baffle is connected with the first baffle and the box body, the third baffle is arranged in the first cavity and divides the first cavity into a first inlet chamber and a second inlet chamber; The third baffle is provided with a third inlet hole, and the first inlet chamber and the second inlet chamber are communicated through the third inlet hole.

12. The battery module of claim 10 or 11, wherein, A plurality of second inlet holes are uniformly arranged on the top of the second baffle or the bottom of the second baffle.

13. The battery module of claim 10 or 11, wherein, A plurality of second inlet holes are arranged in a stepped manner on adjacent second baffles, and the height of the second inlet hole close to the inlet chamber is higher than that of the second inlet hole away from the inlet chamber.

14. The battery module of any one of claims 10-13, wherein, The baffle structure further comprises a plurality of fourth baffles, and the plurality of fourth baffles are arranged in the cooling chamber and connected with the second baffle and / or the first baffle; The plurality of fourth baffles divide the cooling chamber into an upper cooling chamber and a lower cooling chamber, and the upper cooling chamber and the lower cooling chamber are communicated and configured to arrange the battery cell module.

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