CN219801012U

CN219801012U - Battery liquid cooling structure and battery pack

Info

Publication number: CN219801012U
Application number: CN202320873401.2U
Authority: CN
Inventors: 郜旭辉; 戴志炜; 汪展展; 肖鹏
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2023-10-03
Anticipated expiration: 2033-04-18

Abstract

The utility model relates to a battery liquid cooling structure and a battery pack, wherein the battery liquid cooling structure comprises a main body, the length of the main body extends along a first direction, a liquid cooling runner for cooling liquid to flow is arranged in the main body, the liquid cooling runner comprises a first runner, a second runner and a third runner, the first runner is provided with a plurality of runners at intervals along the first direction, the length extending directions of all the first runners are arranged at an included angle with the first direction, the lengths of the second runner and the third runner extend along the first direction, the second runner and the second runner are arranged at intervals along a second direction, the second direction and the first direction are arranged at an included angle, and at least part of the first runners are respectively communicated with the second runner and the third runner. The battery liquid cooling structure has higher cooling uniformity for each battery, improves the temperature uniformity of each battery, and reduces the temperature difference between each battery so that the battery pack has longer service life.

Description

Battery liquid cooling structure and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery liquid cooling structure and a battery pack.

Background

The battery pack generates heat during charging or discharging, so that a liquid cooling pipe is required to be arranged in the battery pack to cool and dissipate heat of each battery, so that the battery pack is maintained at a proper temperature. At present, the length of all cooling flow channels in the liquid cooling pipe extends along the length direction of the liquid cooling pipe, so that cooling liquid in the cooling flow channels can flow along the length direction of the liquid cooling pipe, each battery in the battery pack can be arranged on the surface of the liquid cooling pipe at intervals along the length direction of the liquid cooling pipe, and in the operation process of the battery pack, the cooling liquid in the cooling flow channels exchanges heat with the battery, so that cooling of each battery is realized. The prior art has the following technical defects: because all cooling flow channels all extend along the length direction of the liquid cooling pipe, and the cooling liquid can continuously exchange heat with the batteries in the flowing process of the cooling liquid in the cooling flow channels, so that the cooling liquid continuously absorbs heat and heats up, and the heat exchange capacity of the cooling liquid is continuously reduced, and therefore the heat dissipation capacity of the liquid cooling pipe to each battery along the length direction is gradually weakened, and the battery pack has larger temperature difference among each battery, and the service life of the whole battery pack is further influenced.

Disclosure of Invention

One object of an embodiment of the utility model is to: the battery liquid cooling structure is simple in structure and can uniformly dissipate heat of each battery.

Another object of an embodiment of the utility model is to: the battery pack is simple in structure, and long in service life, and the battery is Wen Xinggao.

To achieve the purpose, the embodiment of the utility model adopts the following technical scheme:

in a first aspect, a battery liquid cooling structure is provided, which comprises a main body, the length of main part extends along first direction, be provided with in the main part and supply cooling liquid flow liquid cooling runner, the liquid cooling runner includes first runner, second runner and third runner, first runner is followed first direction is provided with many, all the length extending direction of first runner all with first direction is the contained angle setting, the second runner with the length of third runner is followed first direction extends, the second runner with the second runner is along second direction interval setting, the second direction with first direction is the contained angle setting, at least part first runner respectively with second runner with third runner intercommunication.

As a preferable solution of the battery liquid cooling structure, all lengths of the first flow channels extend along a set direction.

As a preferable mode of the battery liquid cooling structure, the set direction is the second direction, and the second direction is perpendicular to the first direction.

As a preferable scheme of the battery liquid cooling structure, the second flow channel and the third flow channel are positioned at two ends of the main body which are arranged along the second direction.

As a preferable mode of the battery liquid cooling structure, the main body is provided with a heat insulating member at least at one of both ends arranged in the second direction.

As a preferable scheme of the battery liquid cooling structure, the heat insulation piece comprises heat insulation pieces arranged on two side surfaces of the main body, wherein the two side surfaces are arranged along the third direction.

As a preferred scheme of battery liquid cooling structure, the main part is provided with heat conduction silica gel at least along one side in the two sides that the third direction was arranged, the third direction with first direction and the second direction is the contained angle setting.

As a preferred scheme of battery liquid cooling structure, still include the insulating part, the insulating part sets up the main part surface, heat conduction silica gel part presss from both sides and establishes the insulating part with between the main part.

As a preferred scheme of battery liquid cooling structure, the main part is followed the first direction interval is provided with a plurality of liquid cooling grooves that are used for installing the battery, all the length extending direction of liquid cooling groove with the first direction is the contained angle setting, the main part corresponds every the position of liquid cooling groove is provided with one at least the first runner.

As a preferable mode of the battery liquid cooling structure, the liquid cooling tank is arranged in a penetrating manner along the second direction.

As a preferable solution of the battery liquid cooling structure, the main body is provided with a liquid inlet and a liquid outlet at intervals along the second direction, one of the liquid inlet and the liquid outlet is communicated with the second flow channel, and the other is communicated with the third flow channel;

the liquid outlet and the liquid inlet are positioned at two opposite ends of the main body which are arranged along the first direction; or alternatively, the first and second heat exchangers may be,

the liquid outlet and the liquid inlet are positioned at the same end of the opposite ends of the main body which are arranged along the first direction.

In a second aspect, a battery pack is provided, including a plurality of batteries and the above-mentioned battery liquid cooling structure, all batteries are pasted on the lateral wall of the battery liquid cooling structure along the first direction interval.

The embodiment of the utility model has the beneficial effects that: according to the battery liquid cooling structure, the liquid cooling flow channel is formed in the main body so that cooling liquid can flow in the liquid cooling flow channel, and therefore cooling liquid can dissipate heat with each battery. The first flow channels of the liquid cooling flow channels are arranged on the main body at intervals along the first direction, at least part of the first flow channels are respectively communicated with the second flow channels and the third flow channels, so that all the first flow channels are communicated in parallel, the second flow channels and the third flow channels can be used as converging flow channels of the first flow channels which are used as parts communicated with the second flow channels, when the battery pack is assembled, all the batteries can be attached to the side face of the main body along the first direction, when the cooling liquid flows through the first flow channels, the cooling liquid can also exchange heat with the batteries, and as all the first flow channels are communicated in parallel, the temperature of the cooling liquid in each first flow channel cannot be gradually changed along the first direction, and the heat exchange efficiency of the cooling liquid in each first flow channel to all the batteries is the same, so that the battery liquid cooling structure has higher cooling uniformity to all the batteries.

Drawings

The utility model is described in further detail below with reference to the drawings and examples.

Fig. 1 is a schematic view of a first view angle of a battery liquid cooling structure according to an embodiment of the utility model.

Fig. 2 is a schematic diagram of a second view angle of a battery liquid cooling structure according to an embodiment of the utility model.

Fig. 3 is a cross-sectional view at A-A of fig. 2.

Fig. 4 is a partial enlarged view at B of fig. 3.

Fig. 5 is a schematic structural diagram of a third view angle of the battery liquid cooling structure according to an embodiment of the utility model.

Fig. 6 is a cross-sectional view at C-C of fig. 5.

Fig. 7 is a schematic diagram of a battery liquid cooling structure according to another embodiment of the utility model.

Fig. 8 is a schematic structural view of a battery pack according to an embodiment of the present utility model.

In the figure:

1. a main body; 11. a first flow passage; 12. a second flow passage; 13. a third flow passage; 14. a liquid cooling tank; 15. a liquid inlet; 16. a liquid outlet; 2. a heat insulating member; 3. thermally conductive silica gel; 4. and a battery.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In order to solve the above technical problems, as shown in fig. 1 to 6, the present utility model provides a battery liquid cooling structure, which includes a main body 1, wherein the length of the main body 1 extends along a first direction, a cooling liquid flowing liquid cooling channel is disposed in the main body 1, the liquid cooling channel includes a first channel 11, a second channel 12 and a third channel 13, the first channel 11 is disposed at intervals along the first direction, the length extending directions of all the first channels 11 are disposed at an included angle with the first direction, the lengths of the second channel 12 and the third channel 13 are all extended along the first direction, the second channel 12 and the second channel 12 are disposed at intervals along a second direction, the second direction is disposed at an included angle with the first direction, and at least part of the first channel 11 is respectively communicated with the second channel 12 and the third channel 13. In the battery liquid cooling structure, the liquid cooling flow channel is arranged on the main body 1 so that the cooling liquid flows in the liquid cooling flow channel, and the cooling liquid can radiate heat with each battery 4. The first flow channels 11 of the liquid cooling flow channels are arranged on the main body 1 at intervals along the first direction, at least part of the first flow channels 11 are respectively communicated with the second flow channels 12 and the third flow channels 13, so that the first flow channels 11 are communicated in parallel, the second flow channels 12 and the third flow channels 13 can be used as confluence flow channels of the part of the first flow channels 11 communicated with the second flow channels 12, when the battery pack is assembled, all the batteries 4 can be attached to the side surface of the main body 1 along the first direction, when the cooling liquid flows through the first flow channels 11, the batteries can exchange heat, and as the first flow channels 11 are communicated in parallel, the temperature of the cooling liquid in each first flow channel 11 is not gradually changed along the first direction, and the heat exchange efficiency of the cooling liquid in each first flow channel 11 on all the batteries is the same, so that the battery liquid cooling structure has higher cooling uniformity on all the batteries.

In this embodiment, all the first flow channels 11 are communicated with the second flow channels 12 and the third flow channels 13, so that all the first flow channels 11 can flow in the cooling liquid, and perform uniform liquid cooling heat dissipation on all the batteries 4. In other embodiments, only a portion of the first flow channel 11 may be in communication with the second flow channel 12 and the third flow channel 13, so that the second flow channel 12 and the third flow channel 13 may convey the cooling liquid to a portion of the first flow channel 11, and thus the battery liquid cooling structure may perform uniform liquid cooling heat dissipation on the battery in a local area.

It will be appreciated that one of the second flow channel 12 and the third flow channel 13 is a liquid inlet flow channel, the other is a liquid outlet flow channel, and the flow path of the cooling liquid in the liquid outlet flow channel is as follows: the liquid inlet flow channel, the first flow channel 11 and the liquid outlet flow channel.

As shown in fig. 1, 6 and 7, the X-axis direction is a first direction, the Z-axis direction is a second direction, and the Y-axis direction is a third direction.

Preferably, the cooling liquid can be any one of glycol, water or glycerin, and the glycol, the water and the glycerin are all common cooling liquids, and have good cooling effect. In some embodiments, the cooling liquid may be replaced with a heating solvent to exchange heat to the battery 4 through the heating solvent, thereby achieving the function of heating the battery 4.

In this embodiment, as shown in fig. 6, all the lengths of the first flow channels 11 extend in the set direction, in other words, all the lengths of the first flow channels 11 extend in the same direction, so all the first flow channels 11 are arranged in parallel, and the uniformity of heat dissipation to the respective cells 4 arranged on the side surface of the main body 1 is improved. In some embodiments, at least two first channels 11 are disposed at an angle in the length extension direction, where the two first channels 11 disposed at an angle may be two adjacent first channels 11 or two first channels 11 disposed at intervals.

Specifically, the set direction is the second direction, and the second direction is perpendicular to the first direction, so that all the first flow channels 11 are perpendicular to the second flow channels 12 and the third flow channels 13 respectively, on one hand, the first flow channels 11 are processed on the main body 1, and the processing difficulty of the battery liquid cooling structure is reduced; on the other hand, it is ensured that the coolant in the first flow passage 11 exchanges heat only with the same battery 4. In this embodiment, the second direction is the width direction of the main body 1. In other embodiments, the setting direction may be different from the second direction, and the setting direction only needs to be set at an included angle with the first direction.

In one embodiment, as shown in fig. 6, the second flow channel 12 and the third flow channel 13 are respectively located at two ends of the main body 1 arranged along the second direction. The second flow channels 12 and the third flow channels 13 are respectively communicated at the head end and the tail end of all the first flow channels 11, the length of the first flow channels 11 can be prolonged to the greatest extent in the width direction of the main body 1, and the heat exchange area of the battery liquid cooling structure to the battery 4 is improved, so that the heat dissipation efficiency of the battery is improved. In some embodiments, the second flow passage 12 and the third flow passage 13 may be provided at non-end positions, for example, the second flow passage 12 is provided at one end in the width direction, and the third flow passage 13 is provided at a non-end position of the main body 1; alternatively, the third flow passage 13 is provided at one end of the main body 1 in the width direction, and the second flow passage 12 is provided at a non-end portion of the main body 1; alternatively, the second flow passage 12 and the third flow passage 13 are provided at the non-end portion of the main body 1, and the present embodiment is not limited thereto.

In this embodiment, as shown in fig. 1, the second flow channel 12 and the third flow channel 13 are mainly used for conveying cooling liquid, the cooling liquid in the second flow channel 12 and the third flow channel 13 is not required to exchange heat with the battery 4 or has a low heat exchange degree with the battery, the second flow channel 12 is a liquid inlet flow channel, the third flow channel 13 is a liquid outlet flow channel, in order to reduce the heat exchange between the cooling liquid and air in the conveying process of the second flow channel 12, the side surface of the main body 1 is provided with a heat insulating piece 2 at least at the position corresponding to the second flow channel 12, so as to avoid the heat exchange between the cooling liquid and the outside air before entering the first flow channel 11 to change the temperature of the cooling liquid, and the heat insulating piece 2 is arranged to insulate the second flow channel 12 from the air, so that the temperature of the cooling liquid when entering the first flow channel 11 is consistent with the temperature when the cooling liquid is input into the second flow channel 12, and the cooling capacity of the battery is improved. In this embodiment, the heat insulation members 2 are disposed at two ends of the main body 1 along the second direction, so as to improve the heat insulation efficiency of the main body 1 and the outside air. Of course, in other embodiments, the heat insulator 2 may be provided only at one of the two ends of the main body 1 arranged in the second direction.

In a preferred embodiment, the heat insulation member 2 is arranged on the side surface of the main body 1 corresponding to the second flow channel 12 and the third flow channel 13, so that the cooling liquid in the second flow channel 12 and the third flow channel 13 can be isolated from air, and the heat of the cooling liquid absorbed by the air in the conveying process is further reduced.

Specifically, the heat insulating member 2 includes heat insulating sheets disposed on both sides of the main body 1 arranged in the third direction, in other words, both sides of the main body 1 in the thickness direction are provided with heat insulating sheets, which increases the coverage area of the heat insulating sheets to the main body 1, and further improves the heat insulating efficiency. In this embodiment, the length extension direction of the heat insulating sheets is identical to the extension direction of the main body 1, and the heat insulating members 2 are provided in two, so that the heat insulating sheets are provided in four, four heat insulating sheets can cover both ends of the entire main body 1 in the second direction, and the second flow passages 12 and the third flow passages 13 are located on both ends of the main body 1, so that the four heat insulating sheets can insulate the cooling liquid in the second flow passages 12 and the third flow passages 13.

In an embodiment, the heat insulating member 2 is concavely provided with a heat insulating groove, and the end of the main body 1 is inserted into the heat insulating groove, in other words, the heat insulating member 2 is wrapped on two ends of the main body 1 arranged along the second direction, and the design can further improve the coverage area of the end of the main body 1, thereby improving the heat insulating effect.

In order to further improve the heat dissipation effect of the battery liquid cooling structure on the battery 4, the main body 1 is provided with the heat conduction silica gel 3 at least on one of two side surfaces arranged along the third direction, and the heat conduction silica gel 3 has certain viscosity, so that the heat conduction silica gel 3 can be directly adhered to the groove wall by utilizing the characteristics of the heat conduction silica gel 3, and other structures can be used for auxiliary fixation. And heat conduction silica gel 3 is the elastomer, when the assembly, can extrude battery 4's shell and heat conduction silica gel 3, let battery 4 and heat conduction silica gel 3 fully contact to improve battery 4 and heat conduction silica gel 3's area of contact, simultaneously, heat conduction silica gel 3 has better heat conductivility. In this embodiment, the heat conductive silica gel 3 is provided on both side surfaces in the thickness direction of the main body 1.

Specifically, the both ends that main part 1 arranged along the second direction are provided with thermal-insulated piece 2, are located and form the spacing inslot between the thermal-insulated piece 2 at main part 1 both ends, and heat conduction silica gel 3 sets up in the spacing inslot. It can be understood that two heat insulating sheets are arranged on the same side face of the main body 1 in a protruding manner, so that two heat insulating sheets are connected with the side face of the main body 1 to form a limiting groove, the groove wall of the limiting groove, namely, one side face of the heat insulating sheet can limit the heat conducting silica gel 3, so that the heat conducting silica gel 3 is limited to move along the second direction, and when the heat conducting silica gel 3 is injected on the main body 1, the heat conducting silica gel 3 is in a liquid state, and the heat insulating sheet can prevent the heat conducting silica gel 3 from flowing randomly.

In this embodiment, as shown in fig. 3, a plurality of liquid cooling tanks 14 for installing the battery 4 are arranged on the main body 1 along the first direction at intervals, the length extending direction of all the liquid cooling tanks 14 is arranged at an included angle with the first direction, at least one first flow channel 11 is arranged at the position of the main body 1 corresponding to each liquid cooling tank 14, and the contact area between the main body 1 and the battery 4, that is, the heat exchange area between the main body 1 and the battery 4 can be increased when the battery 4 is installed in the liquid cooling tank 14, so that the cooling efficiency of the battery 4 is increased. In this embodiment, the main body 1 is provided with a plurality of first flow passages 11 corresponding to each liquid cooling pipe groove, so as to increase the flow rate of the cooling liquid flowing through the liquid cooling groove 14, thereby improving the cooling effect on the battery 4.

Specifically, the length of the liquid cooling tank 14 extends in the second direction, that is, the length extending direction of the liquid cooling tank 14 is arranged in parallel with the length extending direction of the first flow channels 11, so that one first flow channel 11 does not span two or more liquid cooling tanks 14, and the battery in each liquid cooling tank 14 has uniform temperature.

In this embodiment, the main body 1 has a serpentine structure, and the liquid cooling tank 14 is formed by bending the main body 1. Specifically, the adjacent two liquid cooling tanks 14 are located on both side surfaces of the main body 1 in the thickness direction, that is, the notch orientations of the adjacent two liquid cooling tanks 14 are opposite. In other embodiments, the liquid cooling tanks 14 are located on the same side of the main body 1.

In one embodiment, as shown in fig. 7, the main body 1 is provided with a liquid inlet 15 and a liquid outlet 16 at intervals, one of the liquid inlet 15 and the liquid outlet 16 is communicated with the second flow channel 12, the other is communicated with the third flow channel 13, and the liquid outlet 16 and the liquid inlet 15 are positioned at opposite ends of the main body 1 which are arranged along the first direction, so that the cooling liquid can be fed and discharged from the two ends of the main body 1 along the length direction.

In another embodiment, as shown in fig. 1, the main body 1 is provided with a liquid inlet 15 and a liquid outlet 16 at intervals along the second direction, one of the liquid inlet 15 and the liquid outlet 16 is communicated with the second flow channel 12, the other is communicated with the third flow channel 13, the liquid outlet 16 and the liquid inlet 15 are positioned at opposite ends of the main body 1 arranged along the first direction, and the liquid outlet 16 and the liquid inlet 15 are positioned at the same end of the opposite ends of the main body 1 arranged along the first direction, so that the cooling liquid can be fed and discharged from the same end of the two ends of the main body 1 along the length direction.

Optionally, the main body 1 is made of an aluminum alloy material, so that on one hand, the aluminum alloy material is light, the weight of the liquid cooling structure of the battery 4 can be reduced, and on the other hand, the aluminum alloy has good heat conduction performance, and is convenient for exchanging heat with the battery 4. Of course, in other embodiments, the main body 1 may be made of other materials, such as alloy steel, copper, and other metal materials.

The utility model also provides a battery pack, as shown in fig. 8, which comprises a battery pack and the battery liquid cooling structure of any embodiment, wherein the battery pack comprises a plurality of batteries 4 arranged at intervals along the first direction, at least one group of batteries 4 of the battery pack are attached to one side surface of the main body 1 of the battery liquid cooling structure, and each liquid cooling groove 14 is provided with one battery 4.4 this battery liquid cooling structure is through being provided with many first runner 11 along first direction interval on main part 1, all first runner 11 are connected in parallel with second runner 12 and third runner 13 respectively and are put through, the coolant liquid is used for carrying out heat transfer with battery 4 in the first runner 11, because all first runner 11 are parallel intercommunication, the temperature of the coolant liquid in each first runner 11 can not change gradually along first direction, the heat exchange efficiency of the coolant liquid in each first runner 11 to all batteries 4 is the same, consequently this battery liquid cooling structure is higher to each battery cooling homogeneity, thereby the sameness difference in temperature of each battery has been improved, reduce between each battery, and then the life of battery package is improved.

In this embodiment, the battery packs are provided with two groups, and the batteries of the two groups of battery packs are respectively arranged on two sides of the main body 1 arranged along the second direction, so that the two sides of the main body 1 can cool and dissipate heat of the two groups of battery packs simultaneously, and the cooling efficiency is improved.

In the description herein, it should be understood that the terms "upper," "lower," and the like are used for convenience in description and simplicity of operation only, and are not necessarily indicative or implying any particular orientation, configuration or operation of such apparatus or elements herein, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the term "an embodiment" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims

1. The utility model provides a battery liquid cooling structure, includes the main part, the length of main part extends along first direction, be provided with in the main part and supply cooling liquid flow liquid cooling runner, a serial communication port, the liquid cooling runner includes first runner, second runner and third runner, first runner is followed the first direction interval is provided with many, all the length extending direction of first runner all with the first direction is the contained angle setting, the second runner with the length of third runner all is followed the first direction extends, the second runner with the third runner is followed the second direction interval setting, the second direction with the first direction is the contained angle setting, at least part first runner respectively with second runner with third runner intercommunication.

2. The battery liquid cooling structure according to claim 1, wherein all lengths of the first flow channels extend in a set direction.

3. The battery liquid cooling structure according to claim 2, wherein the set direction is the second direction, and the second direction is perpendicular to the first direction.

4. The battery liquid cooling structure according to claim 1, wherein the second flow channel and the third flow channel are respectively located at two ends of the main body arranged along the second direction.

5. The battery liquid cooling structure according to claim 1, wherein the second flow channel is a liquid inlet flow channel, the third flow channel is a liquid outlet flow channel, and a heat insulating member is arranged on the side surface of the main body at least at a position corresponding to the second flow channel.

6. The battery liquid cooling structure according to claim 5, wherein the heat insulating member is provided on the side surface of the main body at positions corresponding to the second flow passage and the third flow passage.

7. The battery liquid cooling structure according to claim 5, wherein the heat insulating member comprises heat insulating sheets arranged at intervals on both sides of the main body arranged in a third direction, and the third direction is arranged at an angle to the first direction and the second direction.

8. The battery liquid cooling structure according to any one of claims 1 to 7, wherein the main body is provided with thermally conductive silicone on at least one of two side surfaces arranged along a third direction, and the third direction is disposed at an angle to the first direction and the second direction.

9. The battery liquid cooling structure according to claim 8, wherein heat insulation pieces are arranged at two ends of the main body along the second direction, a limiting groove is formed between the heat insulation pieces at two ends of the main body, and the heat-conducting silica gel is arranged in the limiting groove.

10. The battery liquid cooling structure according to any one of claims 1 to 7, wherein a plurality of liquid cooling grooves for installing a battery are arranged on the main body at intervals along the first direction, the length extending directions of all the liquid cooling grooves are arranged at an included angle with the first direction, and at least one first runner is arranged at a position of the main body corresponding to each liquid cooling groove.

11. The battery liquid cooling structure of claim 10, wherein a length of the liquid cooling trough extends along the second direction.

12. The battery liquid cooling structure according to any one of claims 1 to 7, wherein the main body is provided with a liquid inlet and a liquid outlet at intervals, one of the liquid inlet and the liquid outlet is communicated with the second flow passage, and the other is communicated with the third flow passage;

the liquid outlet and the liquid inlet are both positioned at the same end of the opposite ends of the main body which are arranged along the first direction.

13. A battery pack comprising a battery pack including a plurality of batteries arranged at intervals along a first direction, and a battery liquid cooling structure according to any one of claims 1 to 12, wherein at least one group of the batteries of the battery pack is attached to one side surface of a main body of the battery liquid cooling structure.