CN218769769U - Liquid cooling plate, battery module and battery pack - Google Patents

Abstract

The utility model provides a liquid cooling plate, a battery module and a battery pack, wherein the liquid cooling plate comprises a cooling plate upper plate, a cooling plate lower plate, a runner plate and a compressor, and the cooling plate lower plate and the cooling plate upper plate are arranged at intervals from top to bottom; the runner plate is arranged between the cold plate upper plate and the cold plate lower plate, the upper end face of the runner plate is provided with a first runner groove, and the lower end face of the runner plate is provided with a second runner groove; the cold plate upper plate and the cold plate lower plate are respectively attached to the upper end face and the lower end face of the runner plate and seal the first runner groove and the second runner groove to respectively form a first runner and a second runner; the second flow channel is provided with an inlet and an outlet, the first flow channel is filled with cooling liquid, and the second flow channel is filled with a phase-change working medium; the compressor is in communication with the inlet and the outlet, respectively. The liquid cooling plate can realize upper and lower biplane cooling and can provide enough cooling capacity.

Description

Liquid cooling plate, battery module and battery pack

Technical Field

The utility model relates to a power battery technical field, concretely relates to liquid cooling board, battery module and battery package.

Background

Along with the requirement of the electric automobile on the endurance mileage is higher and higher, the requirement on the space energy density of a battery pack is tighter and tighter, the cooling requirement of a power battery cannot be met by traditional air cooling, and the liquid cooling gradually becomes a main scheme. At present, a conventional liquid cooling plate mainly comprises a runner plate and a flat plate, wherein the runner plate is punched by a die to form a runner groove, and then is welded with the flat plate to form a runner, and a cooling working medium flows in the runner.

Conventional liquid cooling board can only utilize the dull and stereotyped heat transfer of contact of unilateral and battery module, and heat transfer area is less, and the heat transfer effect is relatively poor. When two layers of batteries are placed in the battery pack, two liquid cooling plates are needed for cooling, so that the height of the battery pack is increased, and the energy density of the battery pack is reduced. In addition, the increase of the liquid cooling system pipeline greatly improves the cost and increases the difficulty of flow uniformity adjustment.

In addition, if only the cooling working medium is filled in the flow channel, when the temperature of the power battery is high, the traditional liquid cooling mode may not provide enough cooling capacity, so that the cooling requirement of the power battery cannot be met.

Therefore, it is desirable to provide a novel liquid cooling plate, a battery module and a battery pack to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a liquid cooling board, battery module and battery package not only can realize the cooling of biplane from top to bottom, can also provide sufficient cold volume.

In a first aspect, an embodiment of the present invention provides a liquid cooling plate, including:

cold plate upper plate;

the cold plate lower plate and the cold plate upper plate are arranged at intervals up and down;

the runner plate is arranged between the cold plate upper plate and the cold plate lower plate, the upper end surface of the runner plate is provided with a first runner groove, and the lower end surface of the runner plate is provided with a second runner groove;

the cold plate upper plate and the cold plate lower plate are respectively attached to the upper end face and the lower end face of the runner plate and seal the first runner groove and the second runner groove to respectively form a first runner and a second runner; the second flow channel is provided with an inlet and an outlet, the first flow channel is filled with cooling liquid, and the second flow channel is filled with a phase-change working medium;

a compressor in communication with the inlet and the outlet, respectively.

In one embodiment, the first runner groove and the second runner groove are stamped and formed from the runner plate.

In one embodiment, the upper cold plate and the lower cold plate are both flat plates.

In some embodiments, the first runner duct includes a plurality of runner duct units connected end to end and forming a closed loop, and a plurality of connecting ducts for connecting the plurality of runner duct units to form parallel ducts.

In some embodiments, the runner groove unit includes two first grooves disposed in a middle region of one end surface of the runner plate and a second groove disposed around an outer periphery of the two first grooves, and the two first grooves and the first and second grooves communicate with each other through the connecting groove.

In some embodiments, the first channel is a rectangular first branch channel extending along the length direction of the runner plate, and the two first branch channels are arranged in parallel at intervals in the front-rear direction.

In some embodiments, the second runner groove includes three third grooves disposed in a middle region of the other end surface of the runner plate, and a fourth groove and a fifth groove disposed around peripheries of the three third grooves, and the fourth groove and the fifth groove communicate with the three third grooves respectively to form parallel grooves.

In some embodiments, the third channel is a linear sixth channel extending along the length direction of the runner plate, and the third channel is arranged in parallel at intervals along the front-rear direction.

In a second aspect, the embodiment of the utility model provides a battery module, including last electric core module, lower electric core module and above-mentioned liquid cold plate, the liquid cold plate set up in go up electric core module with down between the electric core module, the up end of cold plate upper plate with go up the heat transfer that contacts of electric core module, the lower terminal surface of cold plate hypoplastron with the heat transfer that contacts of electric core module down.

In a third aspect, embodiments of the present invention provide a battery pack, including the above battery module.

The utility model discloses a beneficial effect of embodiment:

(1) Through making the mode of two runners with single runner plate, compare in traditional runner plate, its heat transfer area greatly increased can also satisfy the heat dissipation of upper and lower two-layer electric core module simultaneously, realizes the mode of single liquid cooling board cooling two-layer battery module to reduce the height of battery module, improved the energy density of battery module.

(2) When the compressor of connecting the second runner does not start, when battery module temperature is higher, the compressor is opened and just can be realized cold cycle, improves the cooling capacity of cooling plate in the twinkling of an eye to improve battery module charge-discharge multiplying power.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without inventive efforts.

Fig. 1 is an exploded view of the liquid cooling panel of the present invention;

FIG. 2 is a schematic structural view of the lower end surface of the flow channel plate in the liquid cooling plate of the present invention;

FIG. 3 is a schematic structural view of a first channel groove in the liquid cooling plate according to the present invention;

FIG. 4 is a schematic structural view of the upper end surface of the flow channel plate in the liquid cooling plate of the present invention;

FIG. 5 is a schematic structural view of a second channel groove in the liquid cooling plate of the present invention;

fig. 6 is a schematic diagram of a first structure of the liquid cooling system of the present invention.

Fig. 7 is a schematic diagram of a second structure of the liquid cooling system of the present invention.

Wherein the reference numerals have the following meanings:

1. cold plate upper plate; 11. a first through hole; 12. a second through hole; 13. a second liquid inlet; 14. a second liquid outlet; 2. a cold plate lower plate; 3. a runner plate; 31. a first flow channel groove; 311. connecting grooves; 3111. a fifth branch channel; 312. a first channel; 3121. a first branch channel; 313. a second channel; 3131. a first main entrance channel; 3132. a first main outlet channel; 3133. a second branch channel; 3134. a third branch channel; 3135. a fourth branch channel; 32. a second flow channel groove; 321. a third channel; 3211. a sixth channel; 322. a fourth channel; 3221. a second main inlet channel; 3222. a seventh branch channel; 323. a fifth channel; 3231. a second main outlet channel; 3232. an eighth channel; 33. a first liquid inlet; 34. a first liquid outlet; 4. mounting a cell module; 41. a square battery cell; 5. a lower battery cell module; 51. and (5) a cylindrical battery cell.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. Furthermore, it is to be understood that the description herein of specific embodiments is for purposes of illustration and explanation only and is not intended to limit the present disclosure. In the present invention, unless stated to the contrary, the terms of orientation such as "upper" and "lower" used herein generally refer to the upper and lower sides of the device in actual use or operation, and particularly to the direction of the drawing in the drawings; while "inner" and "outer" are with respect to the outline of the device.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the indicated module or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1-7, the present invention provides a liquid cooling plate, which comprises an upper cooling plate 1, a lower cooling plate 2 spaced from the upper cooling plate 1 and a flow passage plate 3 disposed between the upper cooling plate 1 and the lower cooling plate 2. The flow field plate 3 has a first flow field groove 31 on the upper end surface and a second flow field groove 32 on the lower end surface.

Optionally, the cold plate upper plate 1 and the cold plate lower plate 2 are both flat plates. The first flow channel groove 31 and the second flow channel groove 32 are formed by punching the flow channel plate 3, so that the first flow channel groove 31 and the second flow channel groove 32 are nested with each other, the first flow channel groove 31 is located on the lower end surface of the flow channel plate 3, the second flow channel groove 32 is located on the upper end surface of the flow channel plate 3, the upper end surface of the cold plate lower plate 2 is attached to the lower end surface of the flow channel plate 3 and seals the first flow channel groove 31 to form a first flow channel, and the lower end surface of the cold plate upper plate 1 is attached to the upper end surface of the flow channel plate 3 and seals the second flow channel groove 32 to form a second flow channel. Wherein, the first flow channel is filled with cooling liquid, and the second flow channel is filled with phase-change working medium. Or, the first flow channel is filled with a phase-change working medium, and the second flow channel is filled with cooling liquid.

It will be appreciated that phase change working fluids have the ability to change their physical state over a range of temperatures. The phase change working medium is in a liquid state, a gel state or a solid state. Taking the solid-liquid phase change as an example, when the solid-liquid phase change is heated to the melting temperature, the solid-liquid phase change is generated, and in the melting process, the phase change working medium absorbs and stores a large amount of heat; when the phase-change working medium is cooled, the heat stored by the phase-change working medium is dissipated to the environment within a certain temperature range, and the phase change from liquid to solid is carried out.

When the second flow channel is filled with the phase-change working medium, the phase-change working medium can be a refrigerant. The second flow passage has an inlet and an outlet, and the compressor is in communication with the inlet and the outlet, respectively. When battery module temperature is higher, can open the refrigerant circulation through the compressor, directly switch into the refrigerant with traditional liquid cooling mode and directly cool, just can improve battery module's cooling capacity in the twinkling of an eye, improve battery module charge-discharge multiplying power greatly. Optionally, the first flow channel and the second flow channel are both parallel flow channels.

From this, when using this liquid cold plate to cool off electric core module 4 and electric core module 5 down simultaneously, can place the liquid cold plate between last electric core module 4 and lower electric core module 5, the up end of this cold plate upper plate 1 is laminated in order to realize the heat conduction with the lower terminal surface of last electric core module 4 mutually, the lower terminal surface of this cold plate hypoplastron 2 is laminated in order to realize the heat conduction with the up end of lower electric core module 5 mutually, go up the heat that electric core module 4 and lower electric core module 5 produced and can transmit respectively to on cold plate upper plate 1 and the cold plate hypoplastron 2 and set up and absorb at the coolant liquid of nested runner internal circulation flow, thereby continuously go up electric core module 4 and dispel the heat with lower electric core module 5, guarantee its work at best operating temperature, reduce power battery's potential safety hazard.

Through adopting the not equidirectional punching press in order to form nested runner on runner plate 3 to realized single runner plate 3 and made the mode of two upper and lower runners, compared in traditional runner plate 3, its heat transfer area greatly increased can also satisfy the heat dissipation of two-layer upper and lower electric core module simultaneously, realized the mode of single liquid cooling board cooling two-layer battery, thereby reduced the height of battery package, improved the energy density of battery package. In addition, the cold drawing hypoplastron 2 of cold plate upper plate 1 and the cold drawing hypoplastron 3 below of this runner plate 3 top welds with runner plate 3 respectively and becomes an organic whole for the upper and lower both ends face of runner plate 3 is level and smooth, and all can contact the heat transfer with electric core module, thereby need not to set up heat conduction structure between runner plate 3 and electric core module, has simplified the structure, the cost is reduced. Meanwhile, the upper cold plate 1 and the lower cold plate 2 are arranged to be flat, and the welding process between the upper cold plate and the lower cold plate and the upper end face and the lower end face of the runner plate 3 is simple and convenient.

Alternatively, the nested flow channels may be formed by multiple punching with different directions on the flow channel plate 3. Of course, the shape of the nested flow channel may be formed by a single-step press molding by developing a mold corresponding to the shape of the nested flow channel, and the present invention is not limited thereto.

In the present embodiment, the cold plate upper plate 1 and the flow channel plate 3, and the cold plate lower plate 2 and the flow channel plate 3 are welded together by brazing.

Referring to fig. 2 to 3, the first runner duct 31 includes a plurality of runner duct units connected end to form a closed loop, and a plurality of connecting slots 311, the runner duct unit includes two first ducts 312 disposed in a middle region of the lower end surface of the runner plate 3 and a second duct 313 disposed around the peripheries of the two first ducts 312, and the two first ducts 312 and the first and second ducts 312 and 313 are communicated with each other through the connecting slots 311 to form parallel ducts.

Specifically, the first channel 312 is a rectangular first branch channel 3121 extending along the length direction of the flow channel plate 3, and the two first branch channels 3121 are arranged in parallel at intervals in the front-rear direction; the second channel 313 includes a first main entrance channel 3131 extending along the length direction of the flow channel plate 3 and being in an inverted U shape, a first main exit channel 3132 extending along the length direction of the flow channel plate 3 and being in an inverted U shape, two second branch channels 3133 extending along the width direction of the flow channel plate 3 and being in a linear shape, two third branch channels 3134 extending along the width direction of the flow channel plate 3 and being in a linear shape, and two fourth branch channels 3135 extending along the length direction of the flow channel plate 3 and being in a linear shape, wherein the first main entrance channel 3131 and the first main exit channel 3132 have the same structure, and are arranged in parallel and symmetrical with each other at intervals; the two second branch channels 3133 have different lengths and are respectively communicated with two liquid outlet ends of the first main inlet channel 3131, the two third branch channels 3134 have different lengths and are respectively communicated with two liquid inlet ends of the first main outlet channel 3132, and the two second branch channels 3133 and the two third branch channels 3134 have the same structure and are arranged in parallel at left and right intervals; two ends of a fourth branch road 3135 are respectively communicated with a second branch road 3133 and a third branch road 3134, two ends of another fourth branch road 3135 are respectively communicated with another second branch road 3133 and another third branch road 3134, and two fourth branch roads 3135 are arranged in parallel at intervals in front and back; the two first branch channels 3121 are located between the two fourth branch channels 3135.

Further, the connecting groove 311 is a straight-line fifth branch groove 3111 extending along the width direction of the flow channel plate 3, two first branch grooves 3121 are communicated with each other through a fifth branch groove 3111, a fourth branch groove 3135 is communicated with one first branch groove 3121 adjacent thereto through a fifth branch groove 3111, and another fourth branch groove 3135 is communicated with another first branch groove 3121 adjacent thereto through a fifth branch groove 3111, thereby forming parallel grooves.

Optionally, the groove depth of the connection groove 311 is smaller than that of the runner groove unit.

After the runner slot unit is punched and formed on the lower end surface of the runner plate 3, the second runner slot 32 is automatically formed on the upper end surface of the runner plate 3, so that after a plurality of connecting slots 311 are punched and formed on the lower end surface of the runner plate 3, the connecting slots 311 form protrusions in the second runner slot 32, and if the slot depth of the connecting slots 311 is greater than or equal to that of the runner slot unit, the protrusions formed by the connecting slots 311 are flush with the top surface of the second runner slot 32 or protrude out of the top surface of the second runner slot 32, so that the circulation of fluid in the second runner slot 32 is blocked. Therefore, the connecting groove 311 with the depth smaller than that of the flow channel groove unit is punched, so that the communication of the first flow channel groove 31 can be realized, the circulation of the second flow channel groove 32 is ensured, meanwhile, the connecting groove 311 can also play a role of turbulence, the flowing boundary feeling of the fluid can be damaged, the fluid can be fully mixed, and the heat exchange capacity is improved.

Furthermore, the flow passage plate 3 is further provided with a first liquid inlet 33 and a first liquid outlet 34 respectively communicating the first main inlet channel 3131 and the first main outlet channel 3132, and the cold plate upper plate 1 is provided with a first through hole 11 corresponding to the first liquid inlet 33 and a second through hole 12 corresponding to the first liquid outlet 34.

Optionally, when the first flow channel is filled with the phase-change working medium, the first liquid inlet 33 and the first liquid outlet 34 may also be used as an inlet and an outlet of the first flow channel, and the compressor is respectively communicated with the first liquid inlet 33 and the first liquid outlet 34.

In this embodiment, the upper plate 1 of the cold plate is further provided with a first liquid inlet pipe (not shown) respectively communicating with the first through hole 11 and the first liquid inlet 33, and a first liquid outlet pipe (not shown) respectively communicating with the second through hole 12 and the first liquid outlet 34. Of course, in other embodiments, the first liquid inlet 33 and the first liquid outlet 34 may be disposed on the cold plate lower plate 2, and in this case, the first through hole 11 and the second through hole 12 do not need to be disposed on the cold plate upper plate 1, and this is not limited herein.

It should be noted that, in other embodiments, the positions of the first liquid inlet 33 and the first liquid outlet 34 may be interchanged, and the present invention is not limited thereto.

Referring to fig. 4 to 5, the second flow field channel 32 includes three third channels 321 disposed in a middle region of an upper end surface of the flow field plate 3, and a fourth channel 322 and a fifth channel 323 disposed around the three third channels 321, the fourth channel 322 and the fifth channel 323 each communicating with the three third channels 321, respectively. Specifically, the third channel 321 is a linear sixth channel 3211 extending along the length direction of the channel plate 3, and the three sixth channels 3211 are arranged in parallel at intervals along the front-rear direction; the fourth slot 322 is L-shaped and includes a second main inlet slot 3221 extending along the length direction of the flow path plate 3 and being linear, and a seventh branch slot 3222 extending along the width direction of the flow path plate 3 and being linear, wherein the seventh branch slot 3222 is respectively communicated with the liquid outlet end of the second main inlet slot 3221 and one end of each of the three sixth branch slots 3211; the fifth groove 323 and the fourth groove 322 have the same structure, and include a second main outlet groove 3231 extending in the length direction of the flow path plate 3 and being linear, and an eighth branch groove 3232 extending in the width direction of the flow path plate 3 and being linear, where the eighth branch groove 3232 is respectively communicated with the liquid inlet end of the second main outlet groove 3231 and the other ends of the three sixth branch grooves 3211. The three sixth, seventh and eighth grooves 3211, 3222, 3232 are in communication with each other and form parallel grooves.

Therefore, the first flow channel groove 31 and the second flow channel groove 32 are both designed into the form of parallel channels, so that the fluid can uniformly flow into each channel, the flowing uniformity of the fluid is improved, the uniformity of the fluid temperature is further ensured, and the uniformity of the battery temperature is improved.

In this embodiment, the upper plate 1 of the cold plate is respectively provided with a second liquid inlet 13 and a second liquid outlet 14 for communicating the second main inlet channel 3221 and the second main outlet channel 3231; a second liquid inlet pipe (not shown) connected to the second liquid inlet 13 and a second liquid outlet pipe (not shown) connected to the second liquid outlet 14 are further disposed through the upper plate 1. Of course, in other embodiments, the second liquid inlet 13 and the second liquid outlet 14 may be provided on the flow channel plate 3, and in this case, a third through hole corresponding to the second liquid inlet 13 and a fourth through hole corresponding to the second liquid outlet 14 need to be provided on the cold plate lower plate 2, which is not limited herein.

Optionally, when the second flow channel is filled with the phase-change working medium, the second liquid inlet 13 and the second liquid outlet 14 may also serve as an inlet and an outlet of the second flow channel, and the compressor is respectively communicated with the second liquid inlet 13 and the second liquid outlet 14.

It should be noted that, in other embodiments, the positions of the second inlet port 13 and the second outlet port 14 may be interchanged, and the present invention is not limited thereto.

Therefore, after the upper cold plate 1 and the lower cold plate 2 are welded with the upper end face and the lower end face of the runner plate 3 into a whole, a first runner and a second runner which are independent and not interfered with each other can be formed on the runner plate 3, so that different types of cooling working media can be added into the first runner or the second runner respectively to meet the cooling requirements of different types of battery cell modules. For example, the first flow channel is filled with cooling liquid, and the second flow channel is filled with phase-change working medium. In addition, the first flow channel and the second flow channel can adopt cocurrent flow (i.e. the first liquid inlet 33 and the second liquid inlet 13 are positioned on the same side, and the first liquid outlet 34 and the second liquid outlet 14 are positioned on the same side), or reverse flow (i.e. the first liquid inlet 33 and the second liquid outlet 14 are positioned on the same side, and the first liquid outlet 34 and the second liquid inlet 13 are positioned on the same side), or can change the directions of the two flow channels (i.e. the flow channels in the first flow channel groove 31 or the second flow channel groove 32 are arranged in an inclined manner), so that the two flow channels form cross flow with a certain included angle, further increase the heat exchange capacity, and ensure the temperature consistency of the battery.

Of course, in other embodiments, through holes may be opened on the side walls of the first flow channel groove 31 and/or the second flow channel groove 32, so that the first flow channel and the second flow channel are communicated with each other and mutually influenced, and the present invention is not limited thereto.

Referring to fig. 7, in addition, the utility model also provides a battery module, including last electric core module 4, lower electric core module 5 and the liquid cold plate in embodiment one, this liquid cold plate sets up at last electric core module 4 and down between electric core module 5. Optionally, the upper electric core module 4 includes a plurality of square electric cores 41 or cylindrical electric cores 51 arranged in parallel, and the upper end surface of the cold plate upper plate 1 is attached to the bottom surfaces of the plurality of square electric cores 41 or cylindrical electric cores 51 to realize heat conduction; the lower cell module 5 includes a plurality of cylindrical cells 51 arranged in parallel. This lower terminal surface of cold drawing hypoplastron 2 is laminated with the top surface of a plurality of cylinder electricity core 51 mutually in order to realize heat conduction, and the heat transfer direction between this cold drawing hypoplastron 2 and a plurality of cylinder electricity core 51 goes on along cylinder electricity core 51's axial, and cylinder electricity core 51's axial coefficient of heat conductivity is great, so the heat transfer effect is better.

Of course, in other embodiments, the upper battery core module 4 and the lower battery core module 5 may be the same battery core module, which is not limited herein.

Additionally, the utility model provides a battery package, including above-mentioned battery module, use this battery module to reduce its occupation to battery package internal volume, also guaranteed the radiating effect to the battery simultaneously.

To sum up, the utility model discloses a liquid cooling plate, battery module and battery package with nested runner, its beneficial effect lies in:

(one) through adopting not equidirectional punching press in order to form nested runner on runner plate 3 to realized that single runner plate 3 makes the mode of two runners, compare in traditional runner plate 3, its heat transfer area greatly increased can also satisfy the heat dissipation of upper and lower two-layer electric core module simultaneously, realized the mode of single liquid cooling board cooling two-layer battery, thereby reduced the height of battery package, improved the energy density of battery package.

(II) when the compressor of connecting the second runner does not start, when battery module temperature is higher, the compressor is opened and just can be realized cold cycle, improves the cooling capacity of cooling plate in the twinkling of an eye to improve battery module charge-discharge multiplying power.

And thirdly, the design of nesting flow channels is adopted on the flow channel plate 3, so that the cold plate upper plate 1 or the cold plate lower plate 2 is not required to be punched, the cold plate upper plate 1 and the cold plate lower plate 2 can be arranged to be flat, and the assembly between the cold plate upper plate 1 and the flow channel plate 3 is more convenient.

And (IV) the upper cold plate 1 and the lower cold plate 2 are respectively welded with the upper end surface and the lower end surface of the runner plate 3 to form two heat exchange surfaces, and the two heat exchange surfaces can directly exchange heat with the electric core in a contact manner, so that a heat conduction structure is not required to be arranged, and the cost is reduced.

And (V) the connecting grooves 311 with different depths are punched on the flow channel plate 3, so that the communication of the whole flow channel groove is realized, and meanwhile, the connecting grooves 311 also play a role of turbulence, the flowing boundary feeling of the fluid is damaged, the fluid can be fully mixed, and the heat exchange capacity is improved.

And (VI) the first flow channel and the second flow channel are both designed into a form of parallel flow channels, so that the fluid can uniformly flow into each channel, the flow uniformity of the fluid is improved, the cooling effect of the liquid cooling plate is further improved, and the temperature uniformity of the battery is also improved.

And (seventhly) the two flow channels on the flow channel plate 3 are mutually independent and do not interfere with each other, so that different types of cooling working media can be placed. In addition, cocurrent and countercurrent flow can be adopted between the two runners, and cross flow with a certain included angle can be formed between the two runners by changing the directions of the two runners, so that the heat exchange capacity is further improved, and the temperature consistency of the battery is ensured.

(eight) the heat transfer direction between this liquid cooling board and the electric core module goes on along the axial of electric core, and electric core axial coefficient of heat conductivity is great, has reduced entire system's thermal resistance, and the heat transfer effect is better.

The embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained in detail herein by using specific embodiments, and the description of the embodiments above is only used to help understand the method and core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be changes in the specific embodiments and the application range, and in summary, the content of the present specification should not be understood as a limitation to the present invention.

Claims (10)

1. A liquid cooling panel, comprising:

a cold plate upper plate (1);

the cold plate lower plate (2), the cold plate lower plate (2) and the cold plate upper plate (1) are arranged at intervals up and down;

the flow channel plate (3) is arranged between the cold plate upper plate (1) and the cold plate lower plate (2), the upper end surface of the flow channel plate (3) is provided with a first flow channel groove (31), and the lower end surface of the flow channel plate is provided with a second flow channel groove (32);

the cold plate upper plate (1) and the cold plate lower plate (2) are respectively attached to the upper end surface and the lower end surface of the runner plate (3) and seal the first runner groove (31) and the second runner groove (32) to respectively form a first runner and a second runner; the second flow channel is provided with an inlet and an outlet, the first flow channel is filled with cooling liquid, and the second flow channel is filled with a phase-change working medium;

a compressor in communication with the inlet and the outlet, respectively.

2. The liquid cold plate according to claim 1, wherein said first channel groove (31) and said second channel groove (32) are stamped and formed from said channel plate (3).

3. The liquid cold plate according to claim 1, wherein said upper cold plate (1) and said lower cold plate (2) are both flat plates.

4. A liquid-cooled panel as claimed in any one of claims 1 to 3, characterised in that the first runner duct (31) comprises a number of runner duct units connected end to end and forming a closed circuit and a number of connecting ducts (311) for connecting the number of runner duct units to form parallel ducts.

5. The liquid cooling plate of claim 4, wherein the runner plate unit comprises two first channels (312) provided at a middle region of one end face of the runner plate (3) and a second channel (313) provided around the outer circumference of the two first channels (312), and the two first channels (312) and the first channel (312) and the second channel (313) are communicated with each other through the connecting groove (311).

6. The liquid cooling plate of claim 5, wherein the first channel (312) is a rectangular first branch channel (3121) extending along the length direction of the runner plate (3), and the two first branch channels (3121) are arranged in parallel at intervals in the front-rear direction.

7. A liquid-cooled plate according to any one of claims 1 to 3, wherein the second flow channel (32) comprises three third channels (321) provided in the middle area of the other end surface of the flow channel plate (3), and a fourth channel (322) and a fifth channel (323) provided around the outer peripheries of the three third channels (321), the fourth channel (322) and the fifth channel (323) communicating with the three third channels (321) respectively to form parallel channels.

8. The liquid cooling plate of claim 7, wherein the third channel (321) is a linear sixth branch channel (3211) extending along the length of the runner plate (3), and the sixth branch channels (3211) are arranged in parallel at intervals in the front-rear direction.

9. A battery module, comprising an upper battery cell module (4), a lower battery cell module (5) and the liquid cooling plate of any one of claims 1 to 8, wherein the liquid cooling plate is disposed between the upper battery cell module (4) and the lower battery cell module (5), the upper end surface of the upper cooling plate (1) is in contact with the upper battery cell module (4) for heat exchange, and the lower end surface of the lower cooling plate (2) is in contact with the lower battery cell module (5) for heat exchange.

10. A battery pack comprising the battery module according to claim 9.

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