CN219917282U - Battery module and all-terrain vehicle - Google Patents

Abstract

The utility model discloses a battery module and an all-terrain vehicle, comprising: a plurality of electrical cores; the bottom plate is internally provided with a first cooling flow passage; at least two curb plates, at least two curb plates are connected at the bottom plate along the opposite both sides of first direction and set up along the second direction, be formed with accommodation space between bottom plate and the at least two curb plates, a plurality of electric cores set up in accommodation space, bottom plate and at least two curb plates are integrated into one piece structure, are provided with first cooling runner in the bottom plate, are provided with the second cooling runner in the curb plate, second cooling runner and first cooling runner intercommunication, first direction and second direction mutually perpendicular. The side surface of the battery cell can be contacted with the side plate, the bottom surface of the battery cell is contacted with the bottom plate, the low-temperature cooling liquid can pass through the heat conduction belt to cool the battery cell rapidly, or the high-temperature cooling liquid can transfer the heat of the low-temperature cooling liquid to the battery cell, the heat conduction efficiency is high, the whole temperature inside the battery cell is uniform, and the local heat enrichment area is avoided.

Description

Battery module and all-terrain vehicle

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module and an all-terrain vehicle.

Background

The bottom temperature of the battery and the top temperature of the battery always keep the temperature difference in the initial period of battery thermal management, especially the larger the height dimension of the battery is, the larger the temperature difference is, the difference between the bottom temperature and the top temperature of the battery is large, and the bad phenomena such as difference, even bulge and the like exist in the attenuation degree of the battery.

In the related art, the liquid cooling plate of the battery module generally only dissipates heat at the bottom of the battery cell, namely, the liquid cooling plate is flatly paved on the lower bottom surface of the module, heat generated by the battery cell is transferred to the cold plate from top to bottom, the cold plate in the form can only dissipate heat from the battery cell from the bottom surface, and particularly, under the condition that the Z-directional height of the battery cell is higher, the heat at the top of the battery cell is difficult to transfer to the bottom, so that the heat dissipation efficiency of the power battery module is reduced, the thermal resistance is increased, the electric performance of the battery cell is unfavorable, and the water cooling efficiency of the whole vehicle is influenced.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a battery module, wherein a first cooling flow passage is arranged on a bottom plate of the battery module, a second cooling flow passage communicated with the first cooling flow passage is arranged on a side plate of the battery module, and the battery module can be in direct contact with the peripheral side surface of a battery cell to conduct heat, so that heat at the top of the battery cell is transferred to the bottom.

The utility model also provides an all-terrain vehicle.

The battery module according to the embodiment of the first aspect of the present utility model includes: a plurality of electrical cores; the bottom plate is internally provided with a first cooling flow passage; the battery pack comprises at least two side plates, at least two side plates are connected with the bottom plate along two opposite sides of a first direction and arranged along a second direction, an accommodating space is formed between the bottom plate and the at least two side plates, a plurality of battery cells are arranged in the accommodating space, the bottom plate and the at least two side plates are of an integrated structure, a second cooling flow passage is arranged in the side plates, the second cooling flow passage is communicated with the first cooling flow passage, and the first direction is mutually perpendicular to the second direction.

According to the battery module provided by the embodiment of the utility model, the first cooling flow channel is arranged on the bottom plate, the second cooling flow channel is arranged on the side plate, the battery core can be placed in the accommodating space formed by the bottom plate and the side plate, so that the structural strength and mechanical property of the battery module are ensured, the shell cost of the battery core is saved, the peripheral side surface of the battery core is directly contacted with the battery module, so that the cooling liquid in the battery module can exchange heat with the battery core, when the battery core needs to be cooled, the cooling liquid with lower temperature can flow into the first cooling flow channel and the second cooling flow channel, the heat generated by the battery core is taken away through heat conduction, and the battery core can be cooled rapidly in such a way, and when the battery core needs to be heated, the cooling liquid with higher temperature flows into the first cooling flow channel and the second cooling flow channel, so that the heat is transferred to the battery core, the battery module can work normally, the heat conduction efficiency is higher, the temperature in the battery core is uniform, the battery module is prevented from having a temperature difference or a local heat enrichment area, and the service life of the battery module is effectively prolonged.

According to some embodiments of the utility model, the battery module includes: the cooling device comprises a first plate body, a second plate body and a flow channel main body, wherein the first plate body and the second plate body are arranged on two opposite sides of the flow channel main body and seal the two opposite sides of the flow channel main body, the first plate body, the second plate body and the flow channel main body are U-shaped and form a bottom plate and at least two side plates, and a first cooling flow channel and a second cooling flow channel are formed between the first plate body, the second plate body and the flow channel main body.

According to some embodiments of the utility model, further comprising: the battery cell comprises a bottom plate and a plurality of battery cells, wherein the bottom plate is connected with the battery cells, the battery cells are arranged on the bottom plate, the battery cells are arranged on the battery cells, and the battery cells are connected with the battery cells.

According to some embodiments of the utility model, further comprising: the reinforcing plate is arranged on one side, deviating from the battery cell, of the end plate, and the reinforcing plate is a heat conducting plate, and the heat conducting plate is provided with heat conducting holes.

According to some embodiments of the utility model, the battery module further comprises: the connecting plate is arranged on two sides of the bottom plate and the side plates in the third direction, and the connecting plate seals the first cooling flow passage and the second cooling flow passage.

According to some embodiments of the utility model, the connection plate comprises: the sealing part and the connecting part are arranged at intervals in the third direction, and the sealing part and the bottom plate are connected at the edge of the third direction and connected with the side plate at the edge of the third direction.

According to some embodiments of the utility model, the battery module further comprises: at least two water nozzles, at least two water nozzles are connected to the outer sides of the bottom plate and/or the side plates, and at least two water nozzles are communicated with the first cooling flow channel and/or the second cooling flow channel.

According to some embodiments of the utility model, the bottom plate and/or the side plate is/are provided with a water gap, one end of the water nozzle facing the water gap is provided with a matching column and a connecting boss, the outer diameter of the connecting boss is larger than that of the matching column, the matching column is matched in the water gap, and the connecting boss is in abutting connection with the bottom plate and/or the side plate.

According to some embodiments of the utility model, the cross-sectional shape of the first cooling flow channel and/or the second cooling flow channel is any one of V-shaped, trapezoidal, rectangular, inverted trapezoidal.

An all-terrain vehicle according to an embodiment of the second aspect of the present utility model includes: the battery module is provided.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a structure of a battery module with a connection plate according to an embodiment of the present utility model;

fig. 2 is a process-molded view of a battery module according to an embodiment of the present utility model;

fig. 3 is a schematic view of a structure of a battery module without a connection plate according to an embodiment of the present utility model;

fig. 4 is a schematic view of a structure of a battery module with a connection plate according to an embodiment of the present utility model;

fig. 5 is a schematic view of a structure of a battery module with a connection plate according to an embodiment of the present utility model;

fig. 6 is a process-molded view of a battery module according to an embodiment of the present utility model;

fig. 7 is a schematic view of a structure of a battery module without a connection plate according to an embodiment of the present utility model;

fig. 8 is an exploded view of a battery module according to an embodiment of the present utility model;

fig. 9 is a front view of a battery module according to an embodiment of the present utility model;

FIG. 10 is an enlarged view of a portion of FIG. 9A;

fig. 11 is a side view of a battery module according to an embodiment of the present utility model;

fig. 12 is a top view of a battery module according to an embodiment of the present utility model;

FIG. 13 is a perspective view of a connection plate according to an embodiment of the present utility model;

fig. 14 is a side view of a connection plate according to an embodiment of the utility model.

Reference numerals:

100. a battery module;

10. a bottom plate; 11. a first cooling flow passage; 12. a side plate; 13. a second cooling flow path; 14. a first plate body; 15. a second plate body; 16. a flow channel body; 17. an end plate; 18. a cover plate; 19. a reinforcing plate; 20. a heat conduction hole; 21. a connecting plate; 22. a connection part; 23. a sealing part; 24. a water tap; 25. a mating post; 26. a connecting boss; 27. a water gap; 28. an accommodation space; 29. and a battery cell.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

The following describes a battery module 100 according to an embodiment of the present utility model with reference to fig. 1 to 14, and the present utility model also proposes a battery module and a vehicle having the above-described battery module 100.

As shown in fig. 1 to 9, the battery module 100 includes: a plurality of cells 29, a bottom plate 10 and at least two side plates 12.

Wherein, at least two curb plates 12 are connected in the bottom plate 10 along the opposite both sides of first direction to set up along the second direction, be formed with accommodation space 28 between bottom plate 10 and the at least two curb plates 12, a plurality of electric core 29 set up in accommodation space 28, and bottom plate 10 and at least two curb plates 12 are integrated into one piece structure.

In this way, at least two side plates 12 are connected to two opposite sides of the bottom plate 10 along the first direction and extend along the second direction, and the at least two side plates 12 and the bottom plate 10 together form a "U" shaped accommodating space 28, so that a plurality of electric cells 29 can be wrapped. The plurality of battery cells 29 may be stacked in the accommodating space 28 along the first direction and/or the second direction and/or the third direction, so that opposite sides of the overall structure formed by the plurality of battery cells 29 in the first direction are in contact with the inner surface of the side plate 12, and the bottom of the overall structure formed by the plurality of battery cells 29 is in contact with the inner surface of the bottom plate 10, which may improve the energy density of the battery module 100.

The bottom plate 10 is provided with a first cooling flow passage 11, the side plate 12 is provided with a second cooling flow passage 13, the second cooling flow passage 13 is communicated with the first cooling flow passage 11, and the first direction and the second direction are mutually perpendicular.

That is, the first cooling flow passage 11 is provided in the bottom plate 10, the second cooling flow passage 13 is provided in the side plate 12, and the first cooling flow passage 11 and the second cooling flow passage 13 are communicated with each other, so that the cooling liquid can circulate in the first cooling flow passage 11 and the second cooling flow passage 13.

Thus, when the temperature of the battery cell 29 is higher, the heat of the battery cell 29 can be transferred to the cooling liquid through the battery module 100, so that the heat of the battery cell 29 is taken away, and the temperature of the battery cell 29 is reduced; when the temperature of the battery cell 29 is low, the battery module 100 can transfer its heat to the battery cell 29 through the cooling liquid with a high temperature, and the battery module 100 can transfer the heat to the battery cell 29 to heat the battery cell 29. So, the setting of battery module 100 can make the side and the bottom surface of electric core 29 all with battery module 100 direct contact on the one hand, heat conduction is efficient to the coolant liquid is at first cooling runner 11 and the cooling circulation of second cooling runner 13, can make the temperature of electric core 29 more homogeneity, and then makes the temperature of every electric core 29 and the temperature of whole electric core structure have good uniformity, has effectively reduced the difference in temperature and has reduced local heat enrichment region, thereby more effectively prolonged the life of electric core 29. On the other hand, the bottom plate 10 and the side plates 12 are directly used as the shells of the battery cells 29, so that the structural strength and the mechanical performance of the battery module can be ensured while the battery cells 29 are effectively radiated, and meanwhile, the shell cost of the battery cells 29 is saved. In addition, the bottom plate 10 and the side plates 12 are of an integrated structure, and the processing technology is simple, the production efficiency is high and the cost is low.

Wherein heat transfer refers to a process of transferring heat from an object with a high temperature to an object with a low temperature, also referred to as heat conduction, by bringing two objects into contact with each other. And, in the present utility model, the first direction is a width direction of the base plate 10, the second direction is a height direction of the base plate 10, and the third direction may be a length direction of the base plate 10.

Therefore, the first cooling flow channel 11 and the second cooling flow channel 13 are arranged on the bottom plate 10 and the side plate 12, so that the battery cell 29 can be placed in the accommodating space 28 formed by the bottom plate 10 and the side plate 12, the structural strength and the mechanical property of the battery module 100 are guaranteed, the shell cost of the battery cell 29 is saved, the peripheral side surface of the battery cell 29 is directly contacted with the battery module 100, the cooling liquid in the battery module 100 can exchange heat with the battery cell 29, when the battery cell 29 needs to be cooled, the cooling liquid with lower temperature can flow into the first cooling flow channel 11 and the second cooling flow channel 13, the heat generated by the battery cell 29 is taken away through heat conduction, the circulation is realized, the battery cell 29 can be cooled down quickly, the cooling liquid with higher temperature can flow into the first cooling flow channel 11 and the second cooling flow channel 13 when the battery cell 29 needs to be heated, the heat is transferred to the battery cell 29, the normal operation is realized, the heat conduction efficiency is higher, the temperature inside the battery cell 29 is uniform, the temperature difference is avoided, or the local heat enrichment area is prolonged, and the service life of the battery module is effectively prolonged.

As shown in fig. 6 to 8, the battery module 100 includes: the first plate body 14, the second plate body 15 and the flow channel main body 16, the first plate body 14 and the second plate body 15 are arranged on two opposite sides of the flow channel main body 16, two opposite sides of the flow channel main body 16 are sealed, the first plate body 14, the second plate body 15 and the flow channel main body 16 are U-shaped, the bottom plate 10 and at least two side plates 12 are formed, and a first cooling flow channel 11 and a second cooling flow channel 13 are formed among the first plate body 14, the second plate body 15 and the flow channel main body 16. Specifically, referring to fig. 8, in the second direction, the first plate 14, the flow path body 16 and the second plate 15 are stacked in sequence, and the first plate 14 and the second plate 15 are disposed on opposite sides of the flow path body 16, respectively, such that the first cooling flow path 11 and the second cooling flow path 13 are commonly constructed among the first plate 14, the second plate 15 and the flow path body 16. The first plate 14, the flow channel body 16 and the second plate 15 are bent at the same position to form a U-shaped structure, so that the first plate 14, the second plate 15 and the flow channel body 16 together form the bottom plate 10 and at least two side plates 12. That is, after the first plate 14, the flow path body 16, and the second plate 15 are bent, the opposite side portions of the first plate 14, the flow path body 16, and the second plate 15 in the first direction constitute the side plates 12, and the middle portion in the first direction constitutes the bottom plate 10.

In the present utility model, the processing procedure of the first plate 14, the second plate 15 and the flow channel main body 16 to form the bottom plate 10 and the at least two side plates 12 is as follows: the first plate body 14, the flow channel main body 16 and the second plate body 15 can be preassembled through welding fixture, after the assembly is completed, a blank of the battery module 100 can be formed through welding of a brazing furnace, as shown in fig. 6, the blank of the battery module 100 is bent into a U-shaped blank of the battery module 100 through a bending process, and finally the U-shaped blank of the battery module 100 is processed into a required installation and process structure through a precision machine tool, so that the assembly condition of the battery module can be met. By the processing method, the cost for manufacturing the die of the battery module 100 and the die opening period are effectively reduced, the welding process of the battery module 100 is changed from the friction stir welding process to the brazing process, the production efficiency is improved, the welding cost is reduced, and the forming process is simpler.

Further, the first cooling flow passage 11 and the second cooling flow passage 13 are provided to extend along a third direction, and the first direction and the third direction are provided to be perpendicular to each other. That is, the first cooling flow channel 11 and the second cooling flow channel 13 are extended along the length direction of the bottom plate 10, so that the first cooling flow channel 11 and the second cooling flow channel 13 are distributed on the bottom plate 10 and the side plate 12 to the largest extent, so as to increase the contact area with the battery cell 29, thereby effectively improving the heat conduction efficiency and realizing the rapid cooling and heating of the battery cell 29.

In some embodiments of the present utility model, the bottom panel 10 and/or the side panel 12 is provided with a first connection (not shown in the drawings) at an edge in the third direction. So set up, bottom plate 10 and/or curb plate 12 are equipped with first connecting portion in the edge department of third direction, can be used for connecting other parts, and then can cover and establish the U-shaped opening department at bottom plate 10 and curb plate 12 to wrap up the side of electric core 29, play the effect of protection electric core 29.

As shown in fig. 1 to 4, the battery module 100 further includes: end plate 17 and apron 18, end plate 17 connect in the opposite both sides of bottom plate 10 along the third direction, and apron 18 lid is established in the top of a plurality of electric cores 29, and the opposite both sides of apron 18 along the third direction are fixed connection with end plate 17.

In this way, at least two side plates 12 are connected to two opposite sides of the bottom plate 10 along the first direction, and the end plates 17 are connected to two opposite sides of the bottom plate 10 along the third direction, so that at least two side plates 12 and the end plates 17 are enclosed around the bottom plate 10 to jointly form a protective casing of the plurality of battery cells 29, and thus, the plurality of battery cells 29 can be well wrapped in the accommodating space 28 to play an effective protection role. The side plates 12 may be connected to the end plates 17 on both sides in the third direction, and may be fixed by bolting, clamping, or the like, or may be connected by providing a connection structure between the side plates 12 and the end plates 17.

And, the apron 18 lid is established in the top of a plurality of electric cores 29 to protect the top of a plurality of electric cores 29, and like this, apron 18, curb plate 12, end plate 17 and bottom plate 10 jointly form the shell of a plurality of electric cores 29, both can protect a plurality of electric cores 29, can also cool off the heat that a plurality of electric cores 29 produced, have saved the cost of battery module 100 greatly.

In addition, the cover plate 18 is fixedly connected to the end plate 17 at two sides of the third direction, in the embodiment, the cover plate 18 is provided with first clamping portions at two sides of the third direction, one side of the end plate 17 adjacent to the cover plate 18 is provided with second clamping portions, for example, the first clamping portions may be clamping grooves, the second clamping portions may be clamping protrusions, and when the cover plate 18 is covered on the battery cell 29, the clamping grooves are matched with the clamping protrusions in a clamping manner, so that production and assembly are facilitated.

In addition, the battery module 100 further includes: the reinforcing plate 19, the reinforcing plate 19 sets up in the end plate 17 side that deviates from electric core 29, and the reinforcing plate 19 is the heat conduction board, and the heat conduction board is provided with heat conduction hole 20.

That is, the reinforcing plate 19 is disposed on the side of the end plate 17 away from the battery cells 29 to further reinforce the connection strength of the end plate 17, and the reinforcing plate 19 may be a heat conducting plate, so that heat generated by the plurality of battery cells 29 can be transferred from both sides in the third direction through the heat conducting plate, and the plurality of heat conducting holes 20 are disposed on the heat conducting plate, so that the heat conducting area can be increased, and thus, the heat dissipation from the place can be accelerated by utilizing the air flow in the periphery, and the heat conducting efficiency can be effectively improved.

In some embodiments, the reinforcing plate 19 may be designed as a grid structure, and after being fixedly connected to the end plate 17 and/or the side plate 12 at two sides of the first direction, the large-area grid heat conduction holes 20 accelerate heat dissipation to the sides of the plurality of electric cells 29 so as to improve heat conduction performance to the plurality of electric cells 29.

In addition, the edge of the side plate 12 in the second direction is provided with a third connecting portion (not shown in the drawing), so that the cover plate 18 on the top of the battery cell 29 can be fixedly connected with the third connecting portion, and can form a shell together with the bottom plate 10 and the side plate 12, so as to wrap the battery cell 29 and protect the battery cell 29.

As shown in fig. 9 to 14, in some embodiments of the present utility model, the battery module 100 further includes: and a connection plate 21, the connection plate 21 being provided at both sides of the bottom plate 10 and the side plate 12 in the third direction, the connection plate 21 sealing the first cooling flow passage 11 and sealing the second cooling flow passage 13. So arranged, the connection plates 21 are provided at both sides of the bottom plate 10 and the side plate 12 in the third direction for sealing the first cooling flow passage 11 and the second cooling flow passage 13 to prevent leakage of the cooling liquid.

Wherein the connection plate 21 further comprises: the sealing portion 23 and the connecting portion 22, the sealing portion 23 and the connecting portion 22 are disposed at intervals in the third direction, the sealing portion 23 and the bottom plate 10 are connected at the edge in the third direction, and are connected with the side plate 12 at the edge in the third direction. So arranged, in the third direction, the side of the connecting plate 21 facing the edges of the bottom plate 10 and the side plate 12 is provided with a sealing portion 23, the side of the connecting plate 21 facing away from the bottom plate 10 and the side plate 12 is provided with a connecting portion 22, wherein the sealing portion 23 may be a boss, after the first plate body 14 and the second plate body 15 are attached to opposite sides of the flow channel body 16, based on the overall size of the first plate body 14 and the second plate body 15 relative to the flow channel main body 16 being larger, an installation space is formed between the first plate body 14 and the second plate body 15 at the edge of the flow channel main body 16, so that the sealing part 23 can be inserted into the installation space, sealing fit between the sealing part 23 and the bottom plate 10 and the side plate 12 is realized, and leakage of cooling liquid is further prevented. In addition, the battery module 100 and the connecting plate 21 are welded together, and are mounted in a pre-positioning manner through the sealing part 23 before welding, and then are precisely positioned through the welding fixture, so that the battery module 100 and the connecting plate 21 can be welded into a whole by friction stir welding. And, the connecting plate 21 is provided with a connecting part 22 which can be used for fixedly connecting other components to serve as a part of the shell of the battery cell 29, so as to protect the side face of the battery cell 29.

In addition, the battery module 100 further includes: at least two water nozzles 24, at least two water nozzles 24 are connected to the outer side of the bottom plate 10 and/or the side plate 12, and at least two water nozzles 24 are communicated with the first cooling flow passage 11 and/or the second cooling flow passage 13. Referring to fig. 9, a water tap 24 is disposed at the outer side of one side plate 12, a water tap 24 is disposed at the outer side of the other side plate 12, and two water taps 24 are connected with the second cooling flow channel 13, so that cooling liquid can enter the second cooling flow channel 13 of one side plate 12 from one water tap 24, sequentially flow through the first cooling flow channel 11 of the bottom plate 10 and the second cooling flow channel 13 of the other side plate 12, and flow out from the water tap 24 of the other side plate 12, thus, the circulation flow can enable the peripheral side surface of the battery cell 29 to be rapidly cooled or heated, and the battery cell 29 can normally work at a proper temperature. Of course, at least two water nozzles 24 may be provided at other positions to ensure that the cooling liquid can circulate in the first cooling flow passage 11 and the second cooling flow passage 13, thereby achieving the purpose of heat exchange with the battery cell 29.

The bottom plate 10 and/or the side plate 12 are/is provided with a water gap 27, one end of the water nozzle 24 facing the water gap 27 is provided with a fitting post 25 and a connection boss 26, the outer diameter of the connection boss 26 is larger than the outer diameter of the fitting post 25, the fitting post 25 is fitted in the water gap 27, and the connection boss 26 abuts against the bottom plate 10 and/or the side plate 12. So configured, as shown with reference to fig. 9 and 10, a water nozzle 24 is installed at the water gap 27 of the bottom plate 10 and/or the side plate 12 to facilitate injection of the cooling liquid into the first cooling flow passage 11 and/or the second cooling flow passage 13. And, be equipped with cooperation post 25 and connection boss 26 in mouth of a river 27 department, cooperation post 25 and connection boss 26 can be integrated into one piece structure, wherein, cooperation post 25 seals according to installing in mouth of a river 27 department, advance the location to water injection well choke 24, further, connection boss 26 is established in cooperation post 25 towards the outside of water injection well choke 24, and the external diameter of connection boss 26 is greater than the external diameter of cooperation post 25, can make connection boss 26 butt at the surface of bottom plate 10 and/or curb plate 12 after cooperation post 25 installs at mouth of a river 27, further spacing fixed to water injection well choke 24, then can fix a position more accurately through the welding frock, and weld the shaping through the brazing process, realize the fixed connection of water injection well choke 24 and bottom plate 10 and/or curb plate 12.

An all-terrain vehicle according to an embodiment of the second aspect of the present utility model includes: and a battery module 100.

Therefore, the first cooling flow channel 11 and the second cooling flow channel 13 are arranged on the bottom plate 10, the battery cell 29 can be placed in the accommodating space 28 formed by the bottom plate 10 and the side plate 12, the effect of ensuring the battery cell 29 is achieved, the side face and the bottom of the battery cell 29 are in direct contact with the battery module 100, heat exchange can be conducted between cooling liquid in the battery module 100 and the battery cell 29, when the battery cell 29 needs to be cooled, the cooling liquid with lower temperature can flow into the first cooling flow channel 11 and the second cooling flow channel 13, heat generated by the battery cell 29 is taken away through heat conduction, the battery cell 29 can be cooled down rapidly through circulation, when the battery cell 29 needs to be heated, the cooling liquid with higher temperature can flow into the first cooling flow channel 11 and the second cooling flow channel 13, heat is transferred to the battery cell 29, the battery cell 29 can work normally, the heat conduction efficiency is higher, the temperature inside the battery cell 29 is uniform, the temperature is prolonged, and the service life of the battery module is prolonged effectively. In addition, the battery module 100 is of an integrally formed structure, is directly used as the shell of the battery cell 29, can effectively dissipate heat of the battery cell 29, and meanwhile can ensure the structural strength and mechanical performance of the battery module, and is simple in processing technology, high in production efficiency and capable of saving the shell cost and the processing cost of the battery cell 29.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example 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 embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. A battery module, comprising:

a plurality of cells (29);

a bottom plate (10), wherein a first cooling flow passage (11) is arranged in the bottom plate (10);

the battery pack comprises at least two side plates (12), wherein at least two side plates (12) are connected to two opposite sides of a bottom plate (10) along a first direction and are arranged along a second direction, an accommodating space (28) is formed between the bottom plate (10) and the at least two side plates (12), a plurality of battery cells (29) are arranged in the accommodating space (28), the bottom plate (10) and the at least two side plates (12) are of an integrated structure, a first cooling flow channel (11) is arranged in the bottom plate (10), a second cooling flow channel (13) is arranged in the side plates (12), the second cooling flow channel (13) is communicated with the first cooling flow channel (11), and the first direction and the second direction are mutually perpendicular;

end plates (17), the end plates (17) being connected to opposite sides of the bottom plate (10) in a third direction;

the cover plate (18), the cover plate (18) covers and establishes a plurality of battery cells (29) top, the both sides that cover plate (18) are along the third direction opposite with end plate (17) fixed connection.

2. The battery module according to claim 1, comprising: the cooling device comprises a first plate body (14), a second plate body (15) and a flow channel main body (16), wherein the first plate body (14) and the second plate body (15) are arranged on two opposite sides of the flow channel main body (16) and seal two opposite sides of the flow channel main body (16), the first plate body (14), the second plate body (15) and the flow channel main body (16) are U-shaped and form the bottom plate (10) and at least two side plates (12), and a first cooling flow channel (11) and a second cooling flow channel (13) are formed between the first plate body (14), the second plate body (15) and the flow channel main body (16).

3. The battery module according to claim 1, further comprising: reinforcing plate (19), reinforcing plate (19) set up end plate (17) deviate from one side of electric core (29), just reinforcing plate (19) are the heat conduction board, the heat conduction board is provided with heat conduction hole (20).

4. The battery module according to claim 1, further comprising: the connecting plate (21), connecting plate (21) set up in bottom plate (10) with curb plate (12) are in the both sides of third direction, connecting plate (21) seal first cooling runner (11) and seal second cooling runner (13).

5. The battery module according to claim 4, wherein the connection plate (21) includes: sealing portion (23) and connecting portion (22), sealing portion (23) with connecting portion (22) are in the third direction interval sets up, sealing portion (23) with bottom plate (10) are connected at the edge of third direction and with curb plate (12) are connected at the edge of third direction.

6. The battery module according to claim 1, further comprising: at least two water nozzles (24), at least two water nozzles (24) are connected to the outer sides of the bottom plate (10) and/or the side plates (12), and at least two water nozzles (24) are communicated with the first cooling flow channel (11) and/or the second cooling flow channel (13).

7. Battery module according to claim 6, characterized in that the bottom plate (10) and/or the side plate (12) is provided with a water gap (27), one end of the water gap (27) towards the water gap (24) is provided with a mating post (25) and a connecting boss (26), the outer diameter of the connecting boss (26) is larger than the outer diameter of the mating post (25), the mating post (25) is mated in the water gap (27), and the connecting boss (26) is abutted with the bottom plate (10) and/or the side plate (12).

8. The battery module according to claim 1, wherein the cross-sectional shape of the first cooling flow passage (11) and/or the second cooling flow passage (13) is any one of V-shape, trapezoidal shape, rectangular shape, inverted trapezoidal shape.

9. An all-terrain vehicle, comprising: the battery module of any one of claims 1-8.