CN217062272U - Liquid cooling plate and battery module - Google Patents

Abstract

The utility model discloses a liquid cooling board and battery module, this liquid cooling board are applied to the battery module, and the liquid cooling board package rubbing board body and cold-storage structure, the inside cooling runner that is used for the holding coolant liquid that forms of plate body, cold-storage structure locate in the cooling runner. The utility model discloses a liquid cooling board and battery module can also the energy saving when realizing carrying out the heat dissipation to electric core, are favorable to prolonging cooling system's life simultaneously.

Description

Liquid cooling plate and battery module

Technical Field

The utility model relates to a battery cooling technology field especially relates to a liquid cooling board and battery module.

Background

The battery generates a large amount of heat during the charging and discharging processes, which causes the temperature of the battery to rise, and the high temperature causes the internal damage of the battery, so that the battery needs to be cooled to achieve a stable working state.

At present, the battery core of the battery is cooled and radiated by the liquid cooling plate, however, in the process of continuous operation of the battery, the cooling system needs to be frequently started to feed cooling liquid into the liquid cooling plate by the current liquid cooling plate, so that the energy consumption of the cooling system is high, and the service life of the cooling system is easily shortened by frequent starting.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses liquid cooling board and battery module can also the energy saving when realizing carrying out the heat dissipation to electric core, is favorable to prolonging cooling system's life simultaneously.

In order to realize above-mentioned purpose, first aspect, the utility model discloses a liquid cooling board is applied to the battery module, the liquid cooling board includes:

the cooling device comprises a plate body, a cooling channel and a cooling device, wherein the cooling channel is formed in the plate body and used for containing cooling liquid; and

the cold accumulation structure is arranged in the cooling flow channel.

As an optional implementation manner, in an embodiment of the present invention, the cold storage structure is multiple, and multiple cold storage structures are disposed in the cooling flow channel at intervals.

As an optional implementation manner, in the embodiment of the present invention, a plurality of partition plates are disposed inside the plate body, the plurality of partition plates divide the cooling flow channel into a plurality of sub-flow channels that are communicated with each other, and the plurality of cold accumulation structures are respectively disposed in the plurality of sub-flow channels.

As an optional implementation manner, in an embodiment of the present invention, the plate body includes a cover plate and a bottom plate that are oppositely disposed along a height direction of the plate body, and a plurality of the partition plates are connected to the cover plate and the bottom plate in an interlaced manner;

the plate body comprises a first main plate and a second main plate which are oppositely arranged along the thickness direction of the plate body, the first main plate is provided with a first inner wall surface located in the cooling flow channel, the second main plate is provided with a second inner wall surface located in the cooling flow channel, and the partition plate is connected to the first inner wall surface and the second inner wall surface.

As an optional implementation manner, in an embodiment of the present invention, the cold storage structure is connected to an inner wall surface of the cooling flow passage.

As an optional implementation manner, in an embodiment of the present invention, the cold storage structure includes a cold storage main body and a cold storage material filled in the cold storage main body.

As an optional implementation manner, in an embodiment of the present invention, the cold storage body is a metal thin film.

As an alternative implementation manner, in the embodiment of the present invention, the surface of the cold storage body is a non-flat surface.

As an optional implementation manner, in an embodiment of the present invention, the plate body includes a first surface and a second surface opposite to each other;

the liquid cooling plate further comprises a plurality of first heat dissipation plates, the plurality of first heat dissipation plates are arranged on the first surface side by side at intervals, and two adjacent first heat dissipation plates are arranged at intervals to form a first placing space for placing the battery cell; and

the second heat dissipation plates are arranged on the second face side by side at intervals, and two adjacent second heat dissipation plates are arranged at intervals to form a second placing space for placing the battery cell.

In order to realize the above-mentioned purpose, the second aspect, the utility model discloses a battery module, battery module includes a plurality of electric cores and as aforesaid first aspect the liquid cooling board, a plurality of electric cores are located the liquid cooling board.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the embodiment of the utility model provides a liquid cooling board, battery module, through set up the cold-storage structure in the cooling runner of casing, the cold-storage structure can absorb and store the cold volume of the coolant liquid in the cooling runner when starting cooling system, can further dispel the heat to the electric core at the cold-storage structure that directly utilizes the cold volume of storing under some specific circumstances, need not frequently to start cooling system, reduce cooling system's operating time to reduce cooling system's energy consumption; the starting frequency of the cooling system can be reduced, so that the service life of the cooling system is prolonged.

In addition, because the cold-storage structure can absorb the cold volume of coolant liquid to prevent the cold volume direct action of coolant liquid and electric core, with the heat impact of reduction cryogenic cooling liquid to high temperature electricity core, make the cooling of electric core more even, be favorable to prolonging the life of electric core. Simultaneously, the cold-storage structure that sets up in the cooling flow channel can also regard as the vortex structure, improves the radiating effect of liquid cooling board.

Drawings

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

Fig. 1 is a schematic perspective view of a liquid cooling plate according to a first aspect of this embodiment;

fig. 2 is an exploded view of a liquid cold plate according to a first aspect of the present embodiment;

FIG. 3 is a sectional view taken along line A-A in FIG. 1;

FIG. 4 is a sectional view taken along line B-B of FIG. 1;

fig. 5 is a schematic perspective view of a liquid cooling plate (with a first heat dissipation plate and a second heat dissipation plate) provided in the first aspect of the present embodiment;

fig. 6 is an exploded schematic view of a liquid cooling plate (with a first heat dissipation plate and a second heat dissipation plate) provided in the first aspect of the present embodiment;

FIG. 7 is a sectional view taken along line C-C of FIG. 5;

fig. 8 is a cross-sectional structural view of a first heat dissipation plate and a second heat dissipation plate provided in the first aspect of the present embodiment;

fig. 9 is a schematic perspective view of a battery module according to a second aspect of the present embodiment;

fig. 10 is a schematic structural diagram of a vehicle according to a third aspect of the present embodiment.

Description of the main reference numerals

1. A plate body; 10. a cooling flow channel; 101. a sub-flow channel; 102. a first inner wall surface; 103. a second inner wall surface; 104. a first side; 105. a second side; 11. a first side; 12. a second face; 13. a first main board; 14. a second main board; 15. a first side plate; 16. a second side plate; 17. a cover plate; 18. a base plate; 2. a cold storage structure; 21. a cold storage main body; 22. a cold storage material; 3. a partition plate; 4. a first heat dissipation plate; 40. a first placing space; 41. a first end heat dissipation plate; 411. a first notch; 5. a second heat dissipation plate; 50. a second placing space; 51. a second end heat sink; 511. a second notch; 6. avoiding holes; 7. a buffer layer; 8. a liquid inlet; 9. a liquid outlet; 100. a liquid-cooled plate; 200. a battery module; 210. an electric core; 300. a vehicle; 310. a vehicle body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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 a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 1 to fig. 3, a first aspect of the present embodiment discloses a liquid cooling plate 100, where the liquid cooling plate 100 is used for a battery module to dissipate heat of a battery cell in the battery module. The liquid cooling plate 100 includes a plate body 1 and a cold accumulation structure 2, a cooling channel 10 for accommodating a cooling liquid is formed in the plate body 1, and the cold accumulation structure 2 is disposed in the cooling channel 10 of the plate body 1.

Because the liquid cooling plate 100 needs the cooling system to inject the cooling liquid into the cooling channel 10 during the working process, the heat dissipation effect on the battery cell is realized, and when the cold accumulation structure 2 is arranged in the cooling channel 10, the cold accumulation structure 2 can absorb and store the cold energy of the cooling liquid in the cooling channel. When the cooling system no longer injects the cooling liquid into the cooling flow channel 10, the liquid cooling plate 100 may firstly dissipate heat from the battery cell by using the cooling energy stored in the cold storage structure 2, and at this time, the cooling system may be in a closed state; when the cold quantity in the cold accumulation structure 2 is not enough to dissipate heat of the battery core, the cooling system is restarted to continue to inject new cooling liquid into the liquid cooling plate 100, so that heat dissipation of the battery core is continued. That is, the arrangement of the cold storage structure 2 can effectively reduce the operation time of the cooling system, thereby reducing the energy consumption of the cooling system, and the arrangement of the cold storage structure 2 can also reduce the switching frequency of the cooling system in the on and off states, which is helpful to prolong the service life of the cooling system.

In addition, when the cooling system injects the cooling liquid into the cooling flow channel 10, the temperature of the cooling liquid is greatly different from the temperature of the battery cell, and the cooling liquid with a lower temperature can cause heat impact on the high-temperature battery cell, so that the battery cell can be rapidly cooled, and in this state, the battery cell is easily failed, and the service life of the battery cell is affected. And after increasing cold-storage structure 2 in cooling runner 10, cold-storage structure 2 can absorb some cold volume that comes from the coolant liquid, and at this moment, the cold volume that acts on high temperature electricity core will reduce to make electricity core can cool down with suitable speed, thereby realize the protection to electricity core, help prolonging the life of electricity core. Meanwhile, the cold accumulation structure 2 can also be used as a turbulent flow structure in the cooling flow channel 10, and can prolong the flowing time of the cooling liquid in the cooling flow channel 10, so as to improve the heat dissipation effect of the liquid cooling plate 100.

In some embodiments, in order to improve the cold storage effect of the cold storage structure 2, a plurality of cold storage structures 2 may be disposed in the cooling flow channel 10, so that the liquid cooling plate 100 may store more cold, thereby prolonging the shutdown time of the cooling system and further reducing the energy consumption of the cooling system. In a practical arrangement, a plurality of cold storage structures 2 may be arranged at intervals in the cooling flow passage 10 so that each cold storage structure 2 can be surrounded by the cooling liquid, thereby better absorbing the cold energy from the cooling liquid.

Further, since the cooling liquid may flow in the cooling flow passage 10, the cold storage structure 2 may shake in the cooling flow passage 10 along with the flow of the cooling liquid, which may cause damage or blockage of the cooling flow passage 10 after the cold storage structure 2 collides with the cooling flow passage 10. In order to avoid the above problem, the cold storage structure 2 may be attached to the inner wall surface of the cooling flow passage 10, thereby achieving fixation of the cold storage structure 2 in the cooling flow passage 10. In an alternative example, the cold storage structure 2 may be connected to the inner wall surface of the cooling flow passage 10 by fusion. In another alternative example, the cold storage structure 2 may be connected to the inner wall surface of the cooling flow passage 10 by bonding, as long as the cold storage structure 2 can be fixed in the cooling flow passage, which is not particularly limited in this embodiment.

In some embodiments, the cold storage structure 2 includes a cold storage body 21 and a cold storage material 22 filled in the cold storage body 21. The cold storage structure 2 mainly depends on the cold storage material 22 in the cold storage main body 21 for cold storage. Since the cooling liquid flows in the cooling flow passage 10, the cold storage material 22 is accommodated in the cold storage body 21, and thus the cold storage material 22 can be prevented from flowing freely in the cooling flow passage 10, even flowing out of the cooling flow passage 10, or causing clogging of the cooling flow passage 10. The cool storage material 22 is accommodated in the cool storage main body 21, so that the cool storage material 22 can be selected from a wide variety, that is, the cool storage material 22 filled in the cool storage main body 21 can be liquid (such as water, kerosene, etc.) or solid (such as rubber, gravel, metal blocks or metal particles, etc.), or even gas. It is understood that, in order to improve the cold storage capacity of the cold storage material 22, the cold storage material 22 should be selected from materials with larger specific heat capacity and better heat conductivity, and the specific material type thereof may be selected according to actual needs, and is not limited in this embodiment.

Further, the cold storage main body 21 and the cold storage material 22 are separately disposed, that is, the cold storage material 22 is mainly filled in the cold storage main body 21, and the cold storage capacity of the cold storage structure 2 can be adjusted by adjusting the type of the cold storage material 22, so as to adjust the heat dissipation efficiency of the battery cell. For example, when there are a plurality of cold storage structures 2 in the cooling flow channel 10, the cold storage materials 22 in the plurality of cold storage structures 2 may be different cold storage materials, such as one of the cold storage structures 2 with the cold storage material 22 being a liquid and the other cold storage structure 2 with the cold storage material 22 being a solid. Of course, when there are a plurality of cold storage structures 2 in the cooling flow channel 10, the same cold storage material may be used as the cold storage material 22 in the plurality of cold storage structures 2.

It should be noted that the above-described replacement of the cold storage material 22 may be performed not only by replacing the type of the cold storage material 22 but also by replacing the cold storage material 22 that has been operated for a long time, so as to perform maintenance on the liquid cooling plate 100.

It is understood that in other embodiments, the cold storage structure 2 may be integrally provided, that is, the cold storage structure 2 itself is a stable cold storage material 22, and the cold storage material 22 may be a solid structure with a fixed shape to prevent the cold storage material 22 from deforming under the impact of the cooling liquid to block the cooling flow channel 10.

Alternatively, in order to further improve the capacity of cold exchange between the cold storage material 22 and the cooling liquid, the surface of the cold storage main body 21 may be set to be an uneven surface, that is, the surface of the cold storage main body 21 may be provided with a convex structure, or the cold storage main body 21 may be provided with a concave structure or the like, so as to improve the turbulence effect of the cold storage structure 2 through the uneven surface, thereby enabling the cold exchange between the cold storage structure 2 and the cooling liquid to be more thorough. Thereby improving the heat dissipation effect of the liquid-cooled panel 100.

In some embodiments, when the cold storage structure 2 is provided as a separate body, although the uneven surface of the cold storage body 21 can improve the capacity of cold energy exchange between the cold storage material 22 and the cooling liquid, since the cold storage material 22 is filled in the cold storage body 21, it is hindered by the cold storage body 21 when absorbing and releasing the cold energy of the cooling liquid. Therefore, in order to facilitate the cold storage material 22 to absorb and release the cold in the coolant, the cold storage main body 21 may be selected as a film main body, that is, a plastic film main body or a metal film main body, because the heat conductivity of the film main body is better, the influence of the cold storage main body 21 on the absorption and release of the cold storage material 22 on the cold can be reduced.

In order to further reduce the influence of the film body on the cool storage material 22, i.e. to further improve the heat conductivity of the film body, the material of the film body may be selected to be a metal material, such as copper, aluminum, and other metals with better heat conductivity, and the specific material may be selected according to actual conditions, which is not limited in this embodiment.

Further, as is apparent from the foregoing, the surface of the cold storage body 21 may be provided as a non-flat surface, and on this basis, the metal thin film body may be used as the cold storage body 21, so that the above-described projections or depressions can be integrally formed on the surface of the metal thin film body when the metal thin film body is formed, thereby simplifying the molding of the cold storage body 21.

It can be seen that, when cold storage structure 2 is disposed in cooling flow channel 10, in order to improve the cold storage capability of cold storage structure 2, the heat dissipation effect of liquid cooling plate 100 can be improved by adjusting the specific structural form of cold storage structure 2.

In addition, since the cooling channels 10 in the liquid cooling plate 100 and the overall structure of the liquid cooling plate 100 both affect the heat dissipation effect, the heat dissipation effect of the liquid cooling plate 100 can be improved by adjusting the cooling channels 10 in the liquid cooling plate 100 and the overall structure of the liquid cooling plate 100. The following will be separately explained.

Because the shapes and the placing modes of the battery cores in different battery modules may be different, the shape of the plate body 1 of the liquid cooling plate 100 may also be adjusted correspondingly, that is, the plate body 1 of the liquid cooling plate 100 may be a strip-shaped plate body 1, or a plate body 1 extending in a wave shape, and the cooling flow channel 10 in the plate body 1 may be formed integrally with the plate body 1, or may be formed by slotting, perforating and the like, in this embodiment, no specific limitation is imposed on the shape of the plate body 1 and the forming mode of the cooling flow channel 10. In order to clearly describe the specific structure of the liquid cooling plate 100, the elongated plate body 1 is taken as an example in the present embodiment, and other structures of the liquid cooling plate 100 will be described.

When the liquid cooling plate 100 is an elongated plate body 1, in order to enable the cooling flow channel 10 to accommodate more cooling liquid, the cooling flow channel 10 may be correspondingly elongated. At this time, the liquid cooling plate 100 has a longitudinal direction (e.g., X direction in fig. 2) which is a flow direction of the cooling liquid, and the liquid cooling plate 100 also has a height direction (e.g., Z direction in fig. 2) and a thickness direction (e.g., Y direction in fig. 2).

In some embodiments, in order to prolong the flowing time of the cooling liquid in the cooling flow channel 10, a plurality of partition plates 3 are arranged inside the cooling flow channel 10 at intervals, the cooling flow channel 10 is divided into a plurality of sub-flow channels 101 which are mutually communicated through the partition plates 3 arranged at intervals, so that when the cooling liquid passes through the cooling flow channel 10, the partition plates 3 can form a turbulent flow structure in the cooling flow channel 10, so that part of the cooling liquid can pass through the plurality of sub-flow channels 101, the flowing time of the cooling liquid in the cooling flow channel 10 is effectively prolonged, the heat exchange effect between the cooling liquid and the plate body 1 is further improved, and the heat dissipation effect on the battery cell is further improved.

Further, a plurality of cold storage structures 2 may be respectively provided in the plurality of sub-flow passages 101. For example, a plurality of cold storage structures 2 may be disposed in each sub-flow passage 101, or one cold storage structure 2 may be correspondingly disposed in each sub-flow passage 101; alternatively, a plurality of cold storage structures 2 may be provided in part of the sub-flow passages 101, one cold storage structure 2 may be provided in part of the sub-flow passages 101, or the like, or even part of the sub-flow passages 101 may be provided with the cold storage structures 2, while the other part of the sub-flow passages 101 is not provided with the cold storage structures 2. The specific arrangement manner may be selected according to the size, shape, etc. of the sub-flow channel 101, and is not limited in this embodiment.

Referring to fig. 4, the cooling flow channel 10 includes a first inner wall surface 102 and a second inner wall surface 103 which are opposite to each other, the first inner wall surface 102 and the second inner wall surface 103 are arranged opposite to each other along the thickness direction of the plate body 1, and two opposite edges of the partition plate 3 are connected to the first inner wall surface 102 and the second inner wall surface 103, respectively, so that the partition plate 3 can effectively partition the cooling flow channel 10 in the flow direction of the cooling liquid, and at this time, the cooling liquid can only flow along the sub-flow channels 101 which are communicated with each other, thereby effectively controlling the flow of the cooling liquid and further prolonging the flow time of the cooling liquid.

Optionally, the cooling flow channel 10 further includes a first side 104 and a second side 105 in the height direction, the plurality of partition boards 3 are respectively connected to the first side 104 and the second side 105, and the plurality of partition boards 3 connected to the first side 104 and the plurality of partition boards 3 connected to the second side 105 are arranged in a staggered manner, at this time, the cooling liquid flows into and out of the sub-flow channel 101 through the partition boards 3 on both sides of the height direction of the cooling flow channel 10, so that the cooling liquid can flow into the next sub-flow channel 101 after passing through one sub-flow channel 101, thereby further prolonging the flowing time of the cooling liquid in the cooling flow channel 10, and further improving the heat dissipation effect on the battery cell.

Referring to fig. 5 to 7, in order to effectively improve the heat dissipation effect and the heat dissipation efficiency of the liquid cooling plate 100 on the battery cell, in addition to designing the cooling flow channel 10, the structure of the liquid cooling plate 100 itself may be improved, that is, a plurality of first heat dissipation plates 4 and a plurality of second heat dissipation plates 5 may be further disposed on the plate body 1. Specifically, the plate body 1 includes a first face 11 and a second face 12 which are opposite to each other, the plurality of first heat dissipation plates 4 are arranged on the first face 11 side by side at intervals, the first placing spaces 40 for placing the battery cells are formed by arranging the adjacent two first heat dissipation plates 4 at intervals, the second placing spaces 50 for placing the battery cells are formed by arranging the plurality of second heat dissipation plates 5 on the second face 12 side by side at intervals, and the adjacent two second heat dissipation plates 5 are arranged at intervals. Because be equipped with a plurality of first heating panels 4 and second heating panel 5 on the first face 11 of plate body 1 and second face 12 respectively, consequently can form a plurality of first spaces 40 and the second of putting in the both sides of plate body 1 and put space 50, promptly, can put more electric cores in the both sides of liquid cooling board 100 to make liquid cooling board 100 can dispel the heat to a plurality of electric cores simultaneously, thereby effectively improve liquid cooling board 100's radiating efficiency.

In addition, because the first heat dissipation plate 4 and the second heat dissipation plate 5 are arranged side by side and at intervals on the plate body 1, the cooling liquid in the cooling channel 10 of the plate body 1 can transfer cooling energy to the first heat dissipation plate 4 and the second heat dissipation plate 5, so that the temperatures of the first heat dissipation plate 4 and the second heat dissipation plate 5 are lower. Therefore, when the first face 11 and the second face 12 of the liquid cooling plate 100 do not have the first heat dissipation plate 4 and the second heat dissipation plate 5, only the first face 11 and the second face 12 of the plate body 1 can cool and dissipate one side of the battery cell, and after the first face 11 and the second face 12 are respectively provided with the first heat dissipation plates 4 and the second heat dissipation plates 5, the first placing space 40 formed at two sides of the plate body 1, the second placing space 50, the battery cell placed in the first placing space 40 can dissipate heat through the first face 11 of the plate body 1 and the two adjacent first heat dissipation plates 4, so that the three sides of the battery cell can be simultaneously dissipated, thereby increasing the heat dissipation area of the battery cell, improving the heat dissipation effect of the battery cell, and further being beneficial to prolonging the service life of the battery cell and the battery module. Accordingly, the heat dissipation effect of the liquid cooling plate 100 on the battery cell placed in the second placing space 50 is as described above for the battery cell in the first placing space 40, and will not be described herein again.

In consideration of the related art, the first heat dissipation plate 4 and the second heat dissipation plate 5 may be provided separately from the plate body 1 and then connected by welding. In the welding process, under the influence of the filling position of the solder and the flatness of the connection surface of the first heat dissipation plate 4 and the first surface 11, at the welding connection position, there may be a position of incomplete contact between the first heat dissipation plate 4 and the first surface 11, that is, there is a gap between the first heat dissipation plate 4 and the first surface 11, resulting in an increase in thermal resistance between the first heat dissipation plate 4 and the first surface 11, so that the cold energy of the plate body 1 cannot be smoothly transmitted to the first heat dissipation plate 4, and further the cold energy of the first heat dissipation plate 4 is insufficient to dissipate heat of the battery cell. Meanwhile, when the battery core transmits heat to the first heat dissipation plate 4, the connection gap between the first heat dissipation plate 4 and the first surface 11 is also not beneficial for the first heat dissipation plate 4 to transmit the heat of the battery core to the cooling liquid in the plate body 1, and the heat dissipation effect of the first heat dissipation plate 4 on the battery core is further influenced.

In addition, when the first heat dissipation plate 4 is connected to the first face 11 by welding, due to poor control of the welding spot position, a protruding structure formed by welding connection is relatively easily generated on the first face 11, and at this time, when the battery cell is placed in the first placement space 40, the protruding structure may interfere with the battery cell, which affects contact between the battery cell and each surface of the first placement space 40, and results in a poor heat dissipation effect of the battery cell. Similarly, the connection between the second heat dissipation plate 5 and the second surface 12 has the above-mentioned problem, and is not described in detail here.

Based on this, the first heat dissipation plate 4 and the second heat dissipation plate 5 are respectively integrally formed on the first surface 11 and the second surface 12, that is, the first heat dissipation plate 4 and the second heat dissipation plate 5 are integrally formed on the plate body 1, at this time, a gap does not exist between the first heat dissipation plate 4 and the first surface 11 and between the second heat dissipation plate 5 and the second surface 12, so that the thermal resistance between the first heat dissipation plate 4 and the first surface 11 and between the second heat dissipation plate 5 and the second surface 12 can be reduced, and further, the heat dissipation effect of the first heat dissipation plate 4 and the second heat dissipation plate 5 on the electric core is improved. Meanwhile, the problem of interference of the battery cell placement caused by the fact that the connection surfaces are not flat due to split arrangement and welding connection can be avoided through the integrated forming, and the heat dissipation effect of the liquid cooling plate 100 on the battery cell is further improved.

In some embodiments, since the thicknesses of the first heat dissipation plate 4 and the second heat dissipation plate 5 may affect the connection areas between the first heat dissipation plate 4 and the first surface 11, and between the second heat dissipation plate 5 and the second surface 12, the larger the connection area is, the better the heat conduction effect between the first heat dissipation plate 4 and the second heat dissipation plate 5, and the plate body 1 is, so as to improve the heat dissipation effect on the electrical core. Therefore, the thicknesses of the first heat dissipation plate 4 and the second heat dissipation plate 5 should be not less than 0.8mm, that is, the thicknesses of the first heat dissipation plate 4 and the second heat dissipation plate 5 may be 0.8mm, 0.85mm, 0.9mm, 1.0mm, 1.2mm, 1.5mm, 1.7mm, 1.9mm, 2.0mm, etc., when the thicknesses of the first heat dissipation plate 4 and the second heat dissipation plate 5 are less than 0.8mm, the heat conduction effect between the plate body 1 and the first heat dissipation plate 4 and the second heat dissipation plate 5 is poor, so that the heat dissipation efficiency of the liquid cooling plate 100 may be reduced. In addition, since the first heat sink 4 and the second heat sink 5 are integrally formed with the first surface 11 and the second surface 12 of the plate body 1, if the thicknesses of the first heat sink 4 and the second heat sink 5 are less than 0.8mm, the forming is difficult, and it is difficult to form the first heat sink 4 and the second heat sink 5, so that the workability of the liquid-cooled panel 100 is deteriorated.

In some embodiments, it is considered that the battery cell not only generates a large amount of heat in the charging and discharging processes, but also causes the casing to expand under the influence of the heat, and because the battery cell is mostly of a cuboid structure, when the battery cell is placed in the first placing space 40 and the second placing space 50, the surfaces in contact with the first heat dissipation plate 4 and the second heat dissipation plate 5 are generally two larger surfaces of the battery cell. When the inflation takes place for electric core, with first heating panel 4, the deformation on the surface of the 5 contacts of second heating panel is more obvious, for providing the space of dodging for the deformation of electric core this moment, in an example, can be at first heating panel 4, the middle part of second heating panel 5 sets up dodging hole 6, reserve the deformation space for the maximum deformation position of electric core, prevent that electric core when the inflation, first heating panel 4, second heating panel 5 extrudees electric core, thereby avoid causing the influence to the shape of electric core, dangerous condition can take place even.

Referring to fig. 8, in another example, a buffer layer 7, such as a foam or a silicone gasket with a large elasticity, may be disposed on the surfaces of the first heat dissipation plate 4 and the second heat dissipation plate 5 to provide an avoidance space for the expansion deformation of the battery cell through the deformation of the buffer layer, so as to prevent the battery cell from being squeezed. The buffer layer 7 can be made of a material with good heat conductivity (such as heat-conducting silica gel, heat-conducting elastic rubber and the like), so that the buffer layer 7 can play a role in buffering and also can play a role in heat conduction, namely, the problems of deformation of the battery core and heat conduction efficiency can be solved simultaneously, the design of the liquid cooling plate 100 is effectively simplified, and the processing manufacturability of the liquid cooling plate 100 is improved.

In another example, the avoiding holes 6 and the buffer layer 7 may be simultaneously disposed on the first heat dissipation plate 4 and the second heat dissipation plate 5, and at this time, the buffer layer 7 may be disposed at a position on the first heat dissipation plate 4 and the second heat dissipation plate 5 where the avoiding holes 6 are not disposed, so as to protect the battery cell. The specific arrangement of the avoiding hole 6 and the buffer layer 7 can refer to the above description, and will not be described herein again.

It can be seen that, the first heat dissipation plate 4 and the second heat dissipation plate 5 are arranged so long as the first placing space 40 and the second placing space 50 for placing the battery cores are formed on the two sides of the plate body 1 of the liquid cooling plate 100, and the plurality of battery cores are placed in the first placing space 40 and the second placing space 50 respectively, so that the heat dissipation of the plurality of surfaces of the battery cores can be realized simultaneously.

It can be understood that, under the condition that the condition allows, the heat dissipation plate structures may also be disposed on a plurality of surfaces of the liquid cooling plate 100, that is, the liquid cooling plate 100 may be an elongated plate 1, or may also be a block-shaped plate 1 having a thicker thickness, so that more battery cells may be placed at different positions, and the heat dissipation efficiency of the liquid cooling plate 100 may be further improved. That is, the first heat sink 4 and the second heat sink 5 may be disposed on two opposite surfaces of the liquid-cooled plate 100 in this embodiment is only an example, and specific examples of which surface of the liquid-cooled plate 100 the heat sinks are disposed on and which surfaces the heat sinks are disposed on at the same time are not limited.

In some embodiments, when the liquid-cooling plate 100 is an elongated plate 1, the liquid-cooling plate 100 may include a first main plate 13, a second main plate 14, a first side plate 15, a second side plate 16, a cover plate 17 and a bottom plate 18, which are oppositely and spaced apart from each other, the first main plate 13, the second main plate 14, the first side plate 15 and the second side plate 16 are connected to form an outer periphery of the plate 1, the bottom plate 18 is opposite to the cover plate 17 to close the cooling channel 10 formed by the first main plate 13, the second main plate 14, the first side plate 15 and the second side plate 16, where the first main plate 13 has a first surface 11 and a first inner wall surface 102 located in the cooling channel 10, the second main plate 14 has a second surface 12 and a second inner wall surface 103 located in the cooling channel 10, and a side surface of the bottom plate 18 and a side surface of the cover plate 17 facing the cooling channel 10 are respectively a first side 104 and a second side 105 of the cooling channel 10, and a liquid inlet 8 and a liquid outlet 9 for introducing and discharging the cooling liquid are respectively provided on the first side plate 15 and the second side plate 16, so that the cooling liquid can flow circularly in the cooling flow channel 10, and the heat generated by the battery cell can be taken away in time, thereby improving the heat dissipation effect of the liquid cooling plate 100 on the battery cell.

The plurality of first heat dissipation plates 4 and the plurality of second heat dissipation plates 5 are disposed at intervals along the length direction (i.e., X direction in fig. 6) of the plate body 1, and the first heat dissipation plates 4 and the second heat dissipation plates 5 located at both ends of the length direction of the plate body 1 are the first end heat dissipation plates 41 and the second end heat dissipation plates 51, in other words, the first end heat dissipation plates 41 are the first heat dissipation plates 4 and the last first heat dissipation plates 4 arranged along the length direction of the plate body 1, and the second end heat dissipation plates 51 are the first second heat dissipation plates 5 and the last second heat dissipation plates 5 arranged along the length direction of the plate body 1. Because first end portion heating panel 41, second end portion heating panel 51 are located the length direction's of first mainboard 13, second mainboard 14 marginal position respectively, and the one side of the electric core that is close to first end portion heating panel 41 and second end portion heating panel 51 this moment is the air, and its radiating rate will obviously be superior to the electric core that is located the middle part position, and the radiating rate that leads to each electric core in same battery module is inhomogeneous to lead to the battery module to appear the condition of local high temperature.

Based on this, in some embodiments, the first notch 411 is disposed at the connection position between the first end portion heat dissipation plate 41 and the first surface 11, the connection area between the first end portion heat dissipation plate 41 and the first surface 11 can be reduced through the arrangement of the first notch 411, so as to reduce the heat conduction performance of the first end portion heat dissipation plate 41, and reduce the heat dissipation speed of the battery cell placed at the position, and further balance the heat dissipation speed of the battery cell located at the edge and the heat dissipation speed of the battery cell located at the middle part in the battery module, thereby preventing the battery module from generating a local high temperature condition, and contributing to prolonging the service life of the battery module.

Alternatively, the first notch 411 may be disposed at an edge of a connection position between the first end heat sink 41 and the first surface 11, or may be disposed in the middle of the connection position between the first end heat sink 41 and the first surface 11, as long as the connection area between the first end heat sink 41 and the first surface 11 can be reduced. In addition, the size of the first notch 411 may be adjusted according to the actual heat dissipation of the battery module by the liquid cooling plate 100, and is not particularly limited in this embodiment.

Or, can be equipped with second breach 511 through the hookup location at second end heating panel 51 and second face 12, can reduce the area of connection of second end heating panel 51 and second face 12 through the setting of this second breach 511, thereby reduce the heat conductivility of second end heating panel 51, in order to reduce the radiating rate to the electric core of putting in this position, and then the radiating rate of the electric core that lies in the edge in the balanced battery module and the radiating rate of the electric core that lies in the middle part, in order to prevent that local high temperature's condition from appearing in the battery module, help prolonging battery module's life.

Alternatively, the second notch 511 may be disposed at the edge of the connection position of the second end heat dissipation plate 51 and the second surface 12, or may be disposed in the middle of the connection position of the second end heat dissipation plate 51 and the second surface 12, as long as the connection area of the second end heat dissipation plate 51 and the second surface 12 can be reduced. In addition, the size of the second notch 511 may be adjusted according to the actual heat dissipation condition of the battery module by the liquid cooling plate 100, and is not particularly limited in this embodiment.

Or, in order to improve the uniformity of heat dissipation of the battery cells in the first placing space 40 and the second placing space 50, the first notch 411 and the second notch 511 may be simultaneously disposed on the first end heat dissipation plate 41 and the second end heat dissipation plate 51, so that while the heat dissipation speed of the single-side battery cells is balanced, the heat dissipation speeds of the battery cells on both sides of the liquid cooling plate 100 may be balanced simultaneously, and the heat dissipation effect of the liquid cooling plate 100 on the battery module is further improved. The positions of the first notch 411 and the second notch 511 and their respective functions can refer to the above description, and are not described herein again.

The liquid cooling plate 100 that this embodiment first aspect provided is through setting up cold-storage structure 2 in cooling runner 10 to carry out the cold-storage through cold-storage structure 2, when cooling system closed, can dispel the heat to electric core by the cold volume of cold-storage structure 2 storage earlier, with the operating duration that reduces cooling system, thereby effective energy saving consumed the festival. Simultaneously because cold-storage structure 2 can absorb the cold volume of coolant liquid, can effectively reduce the thermal shock of cryogenic cooling liquid to high temperature electricity core to the protection to electric core can also be realized when realizing the heat dissipation to electric core.

Referring to fig. 9, in a second aspect, the present embodiment provides a battery module 200, where the battery module 200 includes a plurality of battery cells 210 and the liquid cooling plate 100 according to the first aspect. Battery module 200 with this liquid cooling board 100, its radiating effect to electric core 210 is better, and the radiating efficiency is higher, can improve battery module 200's functional stability, helps prolonging electric core 210 and battery module 200's life.

This battery module 200 can be applied to energy storage system, realizes the storage to the electric energy through battery module 200 to again with the electric energy output in the battery module 200 when needs, thereby improve the rationality of electric energy distribution, and then improve the energy utilization of electric energy. Meanwhile, the battery module 200 may also be applied to an automobile to provide power energy for the automobile.

Referring to fig. 10, in a third aspect, the present embodiment provides a vehicle 300, where the vehicle 300 includes a vehicle body 310 and the battery module 200 according to the second aspect, and the battery module 200 is disposed on the vehicle body 310 and provides power for the vehicle 300. The vehicle 300 having the battery module 200 has more stable power and higher reliability of the vehicle 300.

The liquid cooling plate and the battery module disclosed by the embodiment of the invention are described in detail above, and the principle and the implementation mode of the invention are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the liquid cooling plate and the battery module and the core idea thereof; meanwhile, for a person 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 construed as a limitation to the present invention.

Claims (10)

1. The utility model provides a liquid cooling board, its characterized in that is applied to the battery module, the liquid cooling board includes:

the cooling device comprises a plate body, a cooling channel and a cooling device, wherein the cooling channel is formed inside the plate body and used for containing cooling liquid; and

the cold accumulation structure is arranged in the cooling flow channel.

2. The liquid cooled plate of claim 1, wherein the cold accumulation structure is plural, and the cold accumulation structures are arranged in the cooling flow channel at intervals.

3. The liquid cooling plate of claim 2, wherein a plurality of partition plates are disposed at intervals in the plate body, the plurality of partition plates divide the cooling channel into a plurality of sub-channels communicated with each other, and the plurality of cold accumulation structures are respectively disposed in the plurality of sub-channels.

4. The liquid cooling panel of claim 3, wherein the panel body comprises a cover plate and a bottom plate oppositely arranged along the height direction of the panel body, and a plurality of partition plates are connected to the cover plate and the bottom plate in an interlaced manner;

the plate body further comprises a first main plate and a second main plate which are oppositely arranged along the thickness direction of the plate body, the first main plate is provided with a first inner wall surface located in the cooling flow channel, the second main plate is provided with a second inner wall surface located in the cooling flow channel, and the partition plate is connected to the first inner wall surface and the second inner wall surface.

5. The liquid cooled panel of any one of claims 1-4, wherein the cold storage structure is attached to an inner wall surface of the cooling flow channel.

6. The liquid cooling panel as claimed in any one of claims 1 to 4, wherein the cold storage structure includes a cold storage body and a cold storage material filled in the cold storage body.

7. The liquid cooled plate of claim 6, wherein the cold storage body is a metal thin film.

8. The liquid cooled plate of claim 6, wherein the surface of the cold storage body is a non-planar surface.

9. The liquid cooled panel of any one of claims 1-4 wherein the panel body includes first and second opposed faces;

the liquid cooling plate further comprises a plurality of first heat dissipation plates, the plurality of first heat dissipation plates are arranged on the first surface side by side at intervals, and two adjacent first heat dissipation plates are arranged at intervals to form a first placing space for placing the battery cell; and

the second heat dissipation plates are arranged on the second face side by side at intervals, and two adjacent second heat dissipation plates are arranged at intervals to form a second placing space for placing the battery core.

10. A battery module, characterized in that, the battery module includes a plurality of battery cores and the liquid-cooled plate of any one of claims 1-9, the plurality of battery cores are provided to the liquid-cooled plate.

Images