CN221150136U

CN221150136U - Battery pack with multi-face liquid cooling structure

Info

Publication number: CN221150136U
Application number: CN202322761591.1U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Pylon Technologies Co Ltd
Current assignee: Pylon Technologies Co Ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2024-06-14
Anticipated expiration: 2033-10-13

Abstract

The application relates to the technical field of batteries, in particular to a battery pack with a multi-surface liquid cooling structure, which comprises a box body and a reinforcing beam, wherein the reinforcing beam is arranged in the box body and is connected with the box body; the side wall of the box body is provided with a water inlet, a box wall flow channel and a water outlet which are sequentially communicated; the reinforcing beam is formed with Liang Liudao, and the inlet end of the beam flow channel is communicated with the water inlet through the box wall flow channel, and the outlet end of Liang Liudao is communicated with the water outlet through the box wall flow channel. Therefore, the side wall of the box body and the reinforcing beam in the box body are used as heat exchange plates to exchange heat with the battery cell, the heat exchange area is increased, the heat exchange efficiency and the heat exchange capacity are improved, the output power of the battery pack is obviously improved, the charging speed of the battery pack is improved, the service life of the battery cell is prolonged, the safety performance of a system is improved, the side wall of the box body and the reinforcing beam only use the original box body structure, the redundant space in the pack is not occupied, the electric quantity of the system is not influenced, and the energy density is improved.

Description

Battery pack with multi-face liquid cooling structure

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack with a multi-surface liquid cooling structure.

Background

At present, a battery pack is developed to a faster charging speed and a higher safety and reliability, and the development of high performance of a system is limited by high heat generation of a battery cell, but at present, a liquid cooling system is arranged at the top or bottom of a module, and only the top or bottom of the whole module can be subjected to heat exchange by stacking, so that the heat exchange area is small, the cooling effect is poor, and the battery cell liquid cooling system occupies a large amount of space in the pack when being grouped, so that the electric quantity of the system and the improvement of energy density are greatly influenced.

Disclosure of utility model

The application aims to provide a battery pack with a multi-surface liquid cooling structure, which solves the technical problems that a liquid cooling system in the battery pack in the prior art can only exchange heat for the top or the bottom of the whole module, the heat exchange area is small, the cooling effect is poor, and a large amount of space in the pack can be occupied by a battery core liquid cooling system when the battery core liquid cooling system is grouped, so that the electric quantity and the energy density of the system are greatly influenced.

The application provides a battery pack with a multi-face liquid cooling structure, which comprises: a box body and a reinforcing beam; the reinforcing beam is arranged in the box body and is connected with the box body; the side wall of the box body is provided with a water inlet, a box wall flow channel and a water outlet which are sequentially communicated;

The reinforcing beam is formed with Liang Liudao, the inlet end of the Liang Liudao is communicated with the water inlet through the wall flow passage, and the outlet end of the Liang Liudao is communicated with the water outlet through the wall flow passage.

In the above technical scheme, further, the box body comprises a first side wall and a second side wall opposite to the first side wall, the water inlet is formed in the first side wall, and the water outlet is formed in the second side wall.

In any of the foregoing solutions, further, the reinforcement beam includes a transverse reinforcement beam and a longitudinal reinforcement beam; wherein, both ends of the transverse reinforcing beam are respectively connected with the first side wall and the second side wall;

The longitudinal reinforcing beams are arranged perpendicular to the transverse reinforcing beams; the transverse reinforcement beam and/or the longitudinal reinforcement beam are formed with the Liang Liudao.

In any of the above embodiments, further, the number of the wall flow channels is plural, and the wall flow channels are sequentially arranged at intervals along the height direction of the side wall of the box body.

In any of the above technical solutions, further, liang Liudao extends along a length direction of the reinforcing beam, and penetrates through two ends of the reinforcing beam respectively.

In any of the above embodiments, further, liang Liudao are provided in a plurality of numbers and are sequentially arranged at intervals along the height direction of the reinforcing beam.

In any of the above technical solutions, further, the reinforcing beam divides the interior of the case into a plurality of installation spaces, and any one of the installation spaces is provided with a cell assembly, and any one of the cell assemblies includes a plurality of cells stacked together in sequence.

In any of the above technical solutions, further, the cell assembly is connected to the reinforcing beam by means of gluing.

In any of the above technical solutions, further, the box body includes a coaming, a cover plate, and a bottom plate; the cover plate is arranged at the top opening of the coaming, the bottom plate is arranged at the bottom opening of the coaming, and the cover plate and the bottom plate are respectively connected with the coaming.

In any of the above solutions, further, the reinforcing beam and the cover plate are connected by fastening means, gluing or welding.

In any of the above solutions, further, the reinforcing beam is connected to the base plate by fastening means, gluing or welding.

In any of the above solutions, further, the reinforcing beam and the coaming are connected by fastening members, gluing or welding.

In any of the above technical solutions, further, a groove portion is punched on a side of the cover plate and/or the bottom plate, which is close to the reinforcing beam.

Compared with the prior art, the application has the beneficial effects that:

According to the scheme, the battery pack box body is integrated into a large-scale liquid cooling system, four side walls of the box body are used as heat exchange plates to exchange heat with the battery cells, meanwhile, a plurality of heat exchange plates are used as transverse and longitudinal beams of the box body to be installed in the box body and used for improving the overall structural strength of the system, the liquid cooling plates serving as the transverse and longitudinal beams are connected with the side walls of the box body to form a cooling loop, the battery cells are stacked on one surface and then are used as independent modules to be horizontally placed in an installation space formed by the heat exchange plates and the box walls, at least three-surface cooling of the battery cells is formed, the heat exchange area of the battery cells is increased, the overall heat dissipation capacity of the system is improved, the output power of the system is remarkably improved, the charging speed of the battery pack is greatly improved, the service life of the battery cells is greatly improved, and the safety performance of the system is improved.

The tank wall is used as a part of the liquid cooling system, so that the heat dissipation area of the battery cell is increased, the space occupied by the liquid cooling system in the bag is reduced, and the energy density of the system is improved.

The concept of a soft package battery cell module is omitted, structural components such as an end plate, a side plate and the like in the soft package module are omitted, and the battery cell is directly integrated into the battery box body.

The bottom plate, upper cover and the corresponding characteristic of liquid cooling plate contact's regional all punching press of battery package, for example recess portion, both play the effect of strengthening both connections, can improve the intensity of bottom plate, upper cover again. Meanwhile, the liquid cooling plate is connected with the bottom plate and the upper cover in at least one of fastening members, adhesion or welding.

Structural adhesive is coated between the battery cell assembly and the bottom plate and between the battery cell assembly and the upper cover, and three surfaces of the battery cell assembly, which are in contact with the liquid cooling plate, are coated with heat-conducting structural adhesive, so that the battery cell assembly, the liquid cooling plate, the upper cover, the bottom plate and the coaming are connected into a whole, and the overall structural strength of the system is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a tank with a three-side liquid cooling structure according to an embodiment of the present application;

Fig. 2 is an assembly diagram of a box body and a battery cell assembly with a three-side liquid cooling structure according to an embodiment of the present application;

FIG. 3 is a schematic diagram of another structure of a tank with a three-sided liquid cooling structure according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a tank with a three-sided liquid cooling structure according to an embodiment of the present application;

Fig. 5 is a schematic structural view of a transverse reinforcing beam according to an embodiment of the present application;

FIG. 6 is a cross-sectional view taken along section A-A of FIG. 5;

Fig. 7 is a schematic structural diagram of a cover plate according to an embodiment of the present application.

Reference numerals:

1-box, 11-coaming, 111-first side wall, 112-second side wall, 113-third side wall, 114-fourth side wall, 115-water inlet, 116-water outlet, 12-cover plate, 121-groove part, 122-boss part, 13-bottom plate, 14-installation space, 2-reinforcing beam, 21-transverse reinforcing beam, 211-wire slot, 22-longitudinal reinforcing beam, 23-Liang Liudao, 3-cell assembly.

Detailed Description

The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown.

The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

A battery pack having a multi-sided liquid cooling structure according to some embodiments of the present application is described below with reference to fig. 1 to 7.

Referring to fig. 1, 2, 5 and 6, an embodiment of the present application provides a battery pack having a multi-sided liquid cooling structure, comprising: a box 1 and a reinforcing beam 2; the reinforcing beam 2 is arranged in the box body 1 and is connected with the box body 1 to play a role in increasing the integral strength; the side wall of the box body 1 is provided with a water inlet 115, a box wall runner and a water outlet 116 which are sequentially communicated;

The reinforcing beam 2 is formed with a beam flow passage 23, and an inlet end of the beam flow passage 23 is communicated with the water inlet 115 via a wall flow passage, and an outlet end of Liang Liudao 23 is communicated with the water outlet 116 via a wall flow passage.

Based on the above-described structure, the side wall of the box body 1 and the reinforcing beam 2 inside the box body 1 are used as heat exchange plates to exchange heat with the battery cells, so that the heat exchange area is increased, the heat exchange efficiency and the heat exchange capacity are greatly improved, the output power of the battery pack can be remarkably improved, the charging speed of the battery pack is greatly improved, the service life of the battery cells is greatly prolonged, the safety performance of a system is improved, and the side wall of the box body 1 and the reinforcing beam 2 only use the original box body structure, do not occupy redundant space in the pack, further do not influence the electric quantity of the system, and the energy density of the battery pack is improved.

In this embodiment, preferably, as shown in fig. 1, the case 1 includes a first sidewall 111 and a second sidewall 112 opposite to the first sidewall 111, and the water inlet 115 is disposed at the first sidewall 111 and the water outlet 116 is disposed at the second sidewall 112.

According to the above-described structure, the water inlet 115 and the water outlet 116 are respectively disposed on opposite side walls, so that the inlet and outlet of the heat exchange liquid are separated, thereby avoiding confusion of waterways and helping to promote heat exchange effect.

Further, it is preferable that the case 1 has four side walls, in addition to the aforementioned first side wall 111 and the opposite second side wall 112, further includes a third side wall 113 and a fourth side wall 114 disposed between the first side wall 111 and the second side wall 112, and the third side wall 113 and the fourth side wall 114 are disposed opposite to each other, the water inlet 115 is disposed on the first side wall 111, the water outlet 116 is disposed on the second side wall 112, at least one of the case wall flow passages extends along the water inlet 115, through the first side wall 111, the third side wall 113, the second side wall 112, and finally to the water outlet 116, and at least another case wall flow passage extends along the water inlet 115, through the first side wall 111, the fourth side wall 114, the second side wall 112, and finally to the water outlet 116, and it is seen that the case wall flow passage extends over the entire side wall of the case 1, and the heat exchanging effect is better.

Of course, not limited to the above, the water inlet 115 may be disposed on the first side wall 111, the water outlet 116 may be disposed on the third side wall or the fourth side wall 114 (when the water outlet 116 is disposed on the third side wall 113, at least one of the tank wall flow channels is disposed along the water inlet 115, through the first side wall 111, the third side wall 113, and finally extends to the water outlet 116, and at least another of the tank wall flow channels is disposed along the water inlet 115, through the first side wall 111, the fourth side wall 114, the second side wall 112, the third side wall 113, and finally extends to the water outlet 116), or one of the water inlet 115 and the water outlet 116 is disposed on the third side wall 113, and the other is disposed on the fourth side wall 114, which is specifically selected according to practical needs.

And it should be noted that: the number of the side walls of the box body 1 is not limited to four, and the side walls can be five, six and the like, and the side walls can be specifically selected according to actual needs, so that the water inlet 115 and the water outlet 116 can be correspondingly designed at different positions according to actual needs, the number of the water inlet 115 and the water outlet 116 can be randomly adjusted, and correspondingly, the flow channels of the box wall can be adjusted according to actual needs.

Further, preferably, connectors or pipes are provided at the water inlet 115 and the water outlet 116.

In this embodiment, preferably, as shown in fig. 1 and 2, the reinforcing beam 2 includes a transverse reinforcing beam 21 and a longitudinal reinforcing beam 22; wherein, both ends of the transverse reinforcing beam 21 are respectively connected with the first side wall 111 and the second side wall 112;

The longitudinal reinforcing beams 22 are perpendicular to the transverse reinforcing beams 21, the longitudinal reinforcing beams are used for dividing the whole box body 1 into a plurality of installation spaces 14, the electric core assemblies 3 are arranged in any installation space 14, and the electric core assemblies 3 are sequentially stacked together along the height direction of the installation space 14 by a plurality of electric cores;

The transverse reinforcement beam 21 and the longitudinal reinforcement beam 22 are formed with beam flow channels 23, and of course, not limited thereto, flow channels may be provided only in the transverse reinforcement beam 21 or the longitudinal reinforcement beam 22, specifically selected according to actual needs.

According to the structure described above, the overall strength can be greatly improved by arranging the transverse reinforcing beams 21 and the longitudinal reinforcing beams 22, so that the whole battery pack is not easy to damage, liang Liudao are arranged in the transverse reinforcing beams 21 and the longitudinal reinforcing beams 22, and heat exchange can be performed on four side surfaces in each installation space 14, so that the heat exchange efficiency and the heat exchange capacity are greatly improved.

Further, preferably, two cell assemblies 3 are disposed in each of the mounting spaces 14, and the two cell assemblies 3 are disposed at intervals along the length direction of the mounting space 14, with a cavity formed therebetween for mounting a structure such as a bus bar and a wire harness, and three sides of each cell assembly 3 are cooled. Of course, the number of the cell assemblies 3 in each installation space 14 is not limited to two, but may be one, three, four, or more than two, and specifically selected according to actual needs.

Further, preferably, the cell assembly 3 and the reinforcing beam 2 are connected in an adhesive manner, and are connected into a whole, so that the strength of the whole package is improved.

Further, it is preferable that the transverse reinforcement beam 21 and/or the longitudinal reinforcement beam 22 need to be broken at the junction, for example: the transverse reinforcement beam 21 is a complete structure, because of the reason of the transverse reinforcement beam 21, the single longitudinal reinforcement beam 22 needs to be divided into several sections, and two opposite sides of the transverse reinforcement beam 21 are respectively provided with a section of the longitudinal reinforcement beam 22, and the positions corresponding to the longitudinal reinforcement beams 22 on the transverse reinforcement beam 21 need to be provided with the Liang Liudao communication channels in the longitudinal reinforcement beams 22 on two sides, which are communicated with each other.

Further, it is preferable that the lateral reinforcing beam 21 is provided with a wire groove 211 for passing the wire harness.

In this embodiment, it is preferable that the number of the wall flow passages is plural, and is provided at intervals in sequence along the height direction of the side wall of the tank 1 (not shown in the figure).

According to the structure, a plurality of box wall flow channels are adopted, so that the heat exchange area is increased, and the heat exchange effect is improved.

In this embodiment, liang Liudao, as shown in fig. 6, preferably extends along the length direction of the reinforcing beam 2 and penetrates through both ends of the reinforcing beam 2, respectively.

According to the above-described structure, liang Liudao along the length direction of the beam flow channel 23 extends over the entire reinforcing beam 2, so that the length of Liang Liudao is greatly increased, the heat exchange area is increased, and the heat exchange effect is improved.

In this embodiment, preferably, as shown in fig. 6, liang Liudao is plural in number and is provided at intervals in sequence along the height direction of the reinforcing beam 2.

As can be seen from the above-described structure, the plurality of beam runners 23 are employed to increase the heat exchange area, which contributes to the improvement of the heat exchange effect, and it is preferable that the plurality of beam runners 23 correspond one-to-one with the plurality of wall runners.

In this embodiment, preferably, as shown in fig. 3 and 4, the case 1 includes a shroud 11, a cover plate 12, and a bottom plate 13; wherein, apron 12 sets up in the top opening part of bounding wall 11, and bottom plate 13 sets up in the bottom opening part of bounding wall 11, and apron 12 and bottom plate 13 are connected with bounding wall 11 respectively.

According to the above-described structure, the case 1 is divided into three parts, which is convenient for assembly with the cell assembly 3 and for later maintenance.

In this embodiment, preferably, as shown in fig. 3, the reinforcing beam 2 is connected to the cover plate 12 by a fastening member, which is a detachable connection mode, so that the assembly and maintenance are convenient, and of course, not only this is the case, but also the reinforcing beam 2 and the cover plate 12 may be connected by gluing or welding, and specifically selected according to actual needs.

In this embodiment, preferably, as shown in fig. 4, the reinforcing beam 2 is connected to the bottom plate 13 by a fastening member, which is a detachable connection mode, so that the assembly and maintenance are convenient, and of course, not only this is the case, but also the reinforcing beam 2 and the bottom plate 13 may be connected by gluing or welding, and specifically selected according to actual needs.

In this embodiment, preferably, as shown in fig. 3, the reinforcing beam 2 is connected with the coaming 11 through a fastening member, which belongs to a detachable connection mode, and is convenient for assembly and maintenance, of course, not limited thereto, but the reinforcing beam 2 and the coaming 11 may be connected through an adhesive or welding mode, and particularly selected according to practical needs.

In this embodiment, as shown in fig. 7, preferably, a groove 121 is punched on one side of the cover plate 12 and the bottom plate 13, which is close to the reinforcing beam 2, and is matched with the reinforcing beam 2, so as to improve the stability and firmness of assembly, and the part adjacent to the groove 121 is a protrusion 122 facing the cell assembly 3, the protrusion 122 abuts against the top of the cell assembly 3, so as to improve the stability and firmness of the assembly structure, and the strength of the cover plate 12 and the bottom plate 13, in which the protrusion and groove structures are punched, is higher than that of the flat plate structure. Of course, the recess 121 is not limited to the above-described side of the cover plate 12 and the bottom plate 13 near the reinforcing beam 2, but the recess 121 may be formed only on the side of the cover plate 12 or the bottom plate 13 near the reinforcing beam 2, and the other side may be formed in a flat plate structure or the like.

The battery pack with the multi-surface liquid cooling structure provided by the application has the following structure and advantages:

According to the scheme, the battery pack box body is integrated into a large-scale liquid cooling system, four side walls of the box body 1 are used as heat exchange plates to exchange heat with the battery cells, meanwhile, a plurality of heat exchange plates are used as transverse and longitudinal beams of the box body 1 to be installed in the box body 1 and used for improving the overall structural strength of the system, the liquid cooling plates serving as the transverse and longitudinal beams are connected with the side walls of the box body 1 to form a cooling loop, the battery cells are stacked on one surface and then are horizontally placed in an installation space 14 formed by the heat exchange plates and the box walls as independent modules, at least three sides of the battery cells are cooled, the heat exchange area of the battery cells is enlarged, the overall heat dissipation capacity of the system is improved, the output power of the system is remarkably improved, the charging speed of the battery pack is greatly improved, the service life of the battery cells is greatly prolonged, and the safety performance of the system is improved.

The box wall is used as a part of the liquid cooling system, so that the heat dissipation area of the battery cell is increased, the space occupied by the liquid cooling system in the bag is reduced, and the energy density of the system is improved.

The bottom plate 13 and the upper cover of the battery pack are stamped with corresponding features such as the groove 121 in the contact area of the bottom plate 13 and the upper cover, so that the connection between the bottom plate 13 and the upper cover is reinforced, and the strength of the bottom plate 13 and the upper cover is improved. Meanwhile, the liquid cooling plate is connected with the bottom plate 13 and the upper cover by at least one of fastening members, adhesion or welding.

Structural adhesive is coated between the battery cell assembly 3 and the bottom plate 13 and between the battery cell assembly 3 and the upper cover, and heat conduction structural adhesive is coated on three surfaces of the battery cell assembly 3, which are in contact with the liquid cooling plate, so that the battery cell assembly 3, the liquid cooling plate, the upper cover, the bottom plate 13 and the coaming 11 are connected into a whole, and the overall structural strength of the system is enhanced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

1. A battery pack having a multi-sided liquid cooled structure, comprising: a box body and a reinforcing beam; the reinforcing beam is arranged in the box body and is connected with the box body; the side wall of the box body is provided with a water inlet, a box wall flow channel and a water outlet which are sequentially communicated;

2. The battery pack with the multi-surface liquid cooling structure according to claim 1, wherein the box body comprises a first side wall and a second side wall opposite to the first side wall, the water inlet is formed in the first side wall, and the water outlet is formed in the second side wall.

3. The battery pack having a multi-sided liquid cooled structure according to claim 2, wherein the reinforcement beams comprise a transverse reinforcement beam and a longitudinal reinforcement beam; wherein, both ends of the transverse reinforcing beam are respectively connected with the first side wall and the second side wall;

4. The battery pack having a multi-sided liquid cooling structure according to claim 1, wherein the number of the case wall flow passages is plural and is sequentially arranged at intervals along the height direction of the side wall of the case.

5. The battery pack with the multi-sided liquid cooling structure according to claim 1, wherein Liang Liudao extends along the length direction of the reinforcing beam and penetrates through both ends of the reinforcing beam, respectively.

6. The battery pack having the multi-sided liquid cooling structure according to claim 1, wherein the number of Liang Liudao is plural and is sequentially arranged at intervals along the height direction of the reinforcing beam.

7. The battery pack with the multi-surface liquid cooling structure according to claim 1, wherein the reinforcing beam divides the interior of the box body into a plurality of installation spaces, and each installation space is internally provided with a battery cell assembly, and each battery cell assembly comprises a plurality of battery cells which are sequentially stacked together.

8. The battery pack with multi-sided liquid cooled structure of claim 7, wherein the cell assembly is adhesively connected to the reinforcement beam.

9. The battery pack having a multi-sided liquid cooling structure according to any one of claims 1 to 8, wherein the case includes a coaming, a cover plate, and a bottom plate; the cover plate is arranged at the top opening of the coaming, the bottom plate is arranged at the bottom opening of the coaming, and the cover plate and the bottom plate are respectively connected with the coaming.

10. The battery pack having a multi-sided liquid cooling structure according to claim 9, wherein the reinforcing beam is connected to the cover plate by means of a fastening member, adhesive or welding; and/or

The reinforcing beam is connected with the bottom plate through a fastening member, adhesion or welding; and/or

The reinforcing beam is connected with the coaming through a fastening member, adhesion or welding; and/or

And a groove part is punched on one side of the cover plate and/or the bottom plate, which is close to the reinforcing beam, and a convex part is punched on the side of the cover plate, which is close to the groove part.