Liquid cooling structure for top surface and bottom surface of battery

Abstract

According to the liquid cooling structure for the top surface and the bottom surface of the battery, in the structure, the top surface of at least one battery cell in the vertical direction is provided with a battery cell pole and a battery cell explosion-proof valve; the lower-layer heat conduction pad is arranged at the bottom of the battery cell; the lower-layer heat conduction pad is arranged at the bottom of the lower-layer heat conduction pad and exchanges heat with the battery cell, and the upper-layer heat conduction pad is arranged at the top of the battery cell; the upper-layer cold plate is arranged at the top of the upper-layer heat conduction pad and exchanges heat with the battery cell; and the upper-layer cold plate is provided with a first hollow part for accommodating the battery cell pole and a second hollow part for accommodating the battery cell explosion-proof valve. The structure is high in heat exchange efficiency, low in cost and high in space utilization rate.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery cooling technical field especially relates to a battery top and bottom double -sided part liquid cooling structure. BACKGROUND

[0002] The electric core generates heat especially seriously when being charged at a large rate due to its physical and chemical characteristics, and if not controlled, may cause safety accidents.

[0003] In the prior art, the electric core pole of the electric core is towards Z direction, and the bottom of the electric core is in direct contact with the cold plate through the heat conduction pad for heat exchange. It cannot effectively inhibit the heat accumulation of the electric core when being charged at a large rate, and the high temperature of the electric core may easily lead to power reduction during charging, so that super fast charging cannot be realized, or the risk of thermal runaway may occur. The electric core pole is usually towards +Z direction or -Z direction, and the large surface of the electric core is in direct contact with the left cold plate through the left heat conduction pad, and in direct contact with the right cold plate through the right heat conduction pad for heat exchange. Although the heat exchange efficiency is improved, the number of cold plates leads to high overall cost of the battery pack, and the internal space utilization is relatively low. The electric core pole is towards X direction or Y direction, and is in direct contact with the upper cold plate through the upper heat conduction pad and with the lower cold plate through the lower heat conduction pad for heat exchange. The heat exchange efficiency is improved, but it is only suitable for "blade" type battery with the electric core pole towards X direction or Y direction, and the application range is narrow.

[0004] The above information disclosed in the background section is only used to enhance the understanding of the background of the utility model, and therefore may contain information which does not constitute prior art known to those skilled in the art. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a battery top and bottom double -sided part liquid cooling structure for square aluminum shell electric core with the electric core pole towards +Z direction or -Z direction, high heat exchange efficiency, reduced cost and high space utilization.

[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model relates to a battery top and bottom double -sided part liquid cooling structure including:

[0008] At least one electric core, the top surface in the vertical direction of which is provided with an electric core pole and an electric core explosion-proof valve;

[0009] The lower heat conduction pad is arranged at the bottom of the electric core;

[0010] The lower cold plate is arranged at the bottom of the lower heat conduction pad and exchanges heat with the electric core;

[0011] The upper heat conduction pad is arranged at the top of the electric core;

[0012] An upper layer cold plate is arranged on the top of the upper layer heat conduction pad and exchanges heat with the battery cell, and the upper layer cold plate is provided with a first hollow part for accommodating the battery cell pole and a second hollow part for accommodating the battery cell explosion-proof valve.

[0013] In the battery top and bottom double-sided part liquid cooling structure, the upper layer heat conduction pad is laid on the top of the battery cell.

[0014] In the battery top and bottom double-sided part liquid cooling structure, the upper layer heat conduction pad is provided with a first through hole for penetrating the battery cell pole and a second through hole for penetrating the battery cell explosion-proof valve.

[0015] In the battery top and bottom double-sided part liquid cooling structure, a plurality of battery cells are arranged on the lower layer heat conduction pad in an adjacent manner and are respectively provided with end plates on both sides.

[0016] In the battery top and bottom double-sided part liquid cooling structure, the battery cell poles of adjacent battery cells are connected through a battery cell connection bus bar, and the first hollow part simultaneously accommodates the battery cell poles of all battery cells.

[0017] In the battery top and bottom double-sided part liquid cooling structure, the first hollow part is a long slot.

[0018] In the battery top and bottom double-sided part liquid cooling structure, a plurality of second hollow parts are arranged on the upper layer cold plate to respectively accommodate the battery cell explosion-proof valves.

[0019] In the battery top and bottom double-sided part liquid cooling structure, the upper layer heat conduction pad is provided with a plurality of arrays of first through holes for penetrating at least two adjacent battery cell poles and a plurality of arrays of second through holes for penetrating the battery cell explosion-proof valves, and two adjacent battery cell poles are connected through a battery cell connection bus bar.

[0020] In the battery top and bottom double-sided part liquid cooling structure, the area of the lower layer cold plate is greater than the area of the lower layer heat conduction pad.

[0021] In the battery top and bottom double-sided part liquid cooling structure, the upper layer cold plate and the lower layer cold plate both comprise a serpentine flow channel.

[0022] In the above technical solution, the battery top and bottom double-sided part liquid cooling structure has the following beneficial effects: the battery top and bottom double-sided part liquid cooling structure can reduce the occupied space of the liquid cooling plate device, save more arrangement space in the battery pack and improve the space utilization rate; can be applied to square aluminum shell battery cells with battery cell poles in the +Z direction or the -Z direction; the upper and lower double-sided liquid cooling and hollow design not only ensure the basic electrical and thermal safety performance of the battery, but also realize low cost to meet the super fast charging heat dissipation demand. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below only represent some embodiments of the present application, and all other drawings obtained by those skilled in the art based on these drawings without creative labor fall within the protection scope of the present application.

[0024] Fig. 1 It is a structural schematic view of the battery top and bottom double-sided liquid cooling structure of the present application.

[0025] Fig. 2 It is an assembly schematic view of the battery top and bottom double-sided liquid cooling structure of the present application.

[0026] Fig. 3 It is an assembly schematic view of the battery top and bottom double-sided liquid cooling structure of the present application.

[0027] The marks in the drawings are: battery cell 1, battery cell pole 2, battery cell explosion-proof valve 3, lower layer heat-conducting pad 4, lower layer cold plate 5, upper layer heat-conducting pad 6, upper layer cold plate 7, first hollow part 8, second hollow part 9, end plate 10, battery cell connecting bus bar 11. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0030] It should be noted that: similar marks and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0031] In order to make those skilled in the art better understand the technical solutions of the present application, the following will further introduce the present application in combination with the drawings.

[0032] As Figs. 1-3As shown in one embodiment, the utility model discloses a battery top and bottom double-face liquid cooling structure,

[0033] At least one electric core 1, the top surface in vertical direction is equipped with electric core pole 2 and electric core explosion -proof valve 3;

[0034] Lower heat conduction pad 4, it is equipped in the bottom of electric core 1;

[0035] Lower cold plate 5, it is equipped in the bottom of lower heat conduction pad 4 and with electric core heat exchange;

[0036] Upper heat conduction pad 6, it is equipped in the top of electric core 1;

[0037] Upper cold plate 7, it is equipped in the top of upper heat conduction pad 6 and with electric core heat exchange, upper cold plate 7 is equipped with the first hollow part 8 of accommodating electric core pole 2 and the second hollow part 9 of accommodating electric core explosion -proof valve 3.

[0038] The preferred embodiment of the battery top and bottom double-face liquid cooling structure, the upper heat conduction pad 6 is laid on the top of the electric core.

[0039] The preferred embodiment of the battery top and bottom double-face liquid cooling structure, the upper heat conduction pad 6 is equipped with the first through hole for passing through the electric core pole 2 and the second through hole for passing through the electric core explosion -proof valve 3.

[0040] The preferred embodiment of the battery top and bottom double-face liquid cooling structure, a plurality of electric cores are arranged adjacent to the lower heat conduction pad 4 and are provided with end plates 10 on both sides.

[0041] The preferred embodiment of the battery top and bottom double-face liquid cooling structure, the electric core poles 2 of adjacent electric cores are connected through the electric core connection busbar 11, and the first hollow part 8 simultaneously accommodates the electric core poles 2 of all electric cores.

[0042] The preferred embodiment of the battery top and bottom double-face liquid cooling structure, the first hollow part 8 is a long slot.

[0043] The preferred embodiment of the battery top and bottom double-face liquid cooling structure, a plurality of the second hollow parts 9 are arranged on the upper cold plate 7 to respectively accommodate the electric core explosion -proof valves 3.

[0044] The preferred embodiment of the battery top and bottom double-face liquid cooling structure, the upper heat conduction pad 6 is provided with a plurality of arrays of first through holes for passing through at least two adjacent electric core poles 2 and a plurality of arrays of second through holes for passing through the electric core explosion -proof valves 3, and two adjacent electric core poles 2 are connected through the electric core connection busbar 11.

[0045] In the preferred embodiment of the battery top and bottom double-sided liquid cooling structure, the area of the lower cooling plate 5 is greater than the area of the lower thermal pad 4.

[0046] In the preferred embodiment of the battery top and bottom double-sided liquid cooling structure, the upper cooling plate 7 and the lower cooling plate 5 each comprise a serpentine flow channel.

[0047] In one embodiment, the bottom of the battery cell is in direct contact with the lower cooling plate 5 through the lower thermal pad 4 for heat exchange. The top of the battery cell is in direct contact with the upper cooling plate 7 through the upper thermal pad 6 for heat exchange, and the upper cooling plate 7 avoids the explosion valve 3 and the battery cell pole 2 by being hollowed out.

[0048] In one embodiment, the assembly sequence is to first paste the lower thermal pad 4 and the lower cooling plate 5 in place, then place the battery cell group compressed by the end plate 10 on the lower thermal pad 4 and the lower cooling plate 5, and finally install the end plate 10 by fixing bolts to achieve the installation of the battery cell 1.

[0049] Then the upper thermal pad is laid on the battery cell, and finally the upper cooling plate is placed on the upper thermal pad, and the battery cell connection bus bar passes through the hollow part of the upper cooling plate. The upper thermal pad can be a non-adhesive thermal pad, which is tightly attached to the battery cell by other compression structure design to achieve sufficient heat exchange; the upper thermal pad can also be a thermal structure adhesive, which tightly bonds the upper cooling plate and the battery cell to achieve sufficient heat exchange.

[0050] Finally, it should be noted that the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] The above only describes some exemplary embodiments of the present application by way of illustration, and it is not necessary to modify the described embodiments in various ways without deviating from the spirit and scope of the present application for ordinary skilled in the art. Therefore, the above figures and description are illustrative in nature and should not be understood as limiting the scope of protection claimed by the present application.

Claims

1. A battery top and bottom double-sided section liquid cooling structure, characterized by, It comprises, at least one battery cell, a top surface of which in a vertical direction is provided with a battery cell pole and a battery cell explosion-proof valve; a lower layer heat-conducting pad provided at a bottom of the battery cell; a lower layer cold plate provided at a bottom of the lower layer heat-conducting pad and in heat exchange with the battery cell; an upper layer heat-conducting pad provided at a top of the battery cell; an upper layer cold plate provided at a top of the upper layer heat-conducting pad and in heat exchange with the battery cell, the upper layer cold plate being provided with a first hollow part accommodating the battery cell pole and a second hollow part accommodating the battery cell explosion-proof valve.

2. The battery top and bottom double-sided liquid cooling structure according to claim 1, characterized in that, The upper layer heat-conducting pad is laid flat on the top of the battery cell.

3. The battery top and bottom double-sided liquid cooling structure according to claim 1, characterized in that, The upper layer heat-conducting pad is provided with a first through hole for passing through the battery cell pole and a second through hole for passing through the battery cell explosion-proof valve.

4. The battery top and bottom double-sided liquid cooling structure according to claim 1, characterized in that, A plurality of battery cells are arranged adjacently on the lower layer heat-conducting pad and provided with end plates at both sides respectively.

5. The battery top and bottom double-sided liquid cooling structure according to claim 4, characterized in that, The battery cell poles of adjacent battery cells are connected via a battery cell connecting bus bar and the first hollow part accommodates the battery cell poles of all the battery cells simultaneously.

6. The battery top and bottom double-sided liquid cooling structure according to claim 5, characterized in that, The first hollow part is a long slot.

7. The battery top and bottom double-sided liquid cooling structure according to claim 4, characterized in that, A plurality of the second hollow parts are arranged on the upper layer cold plate to accommodate the battery cell explosion-proof valves respectively.

8. The battery top and bottom double-sided liquid cooling structure according to claim 4, characterized in that, The upper layer heat-conducting pad is provided with a plurality of arrays of first through holes for passing through at least two adjacent battery cell poles and a plurality of arrays of second through holes for passing through the battery cell explosion-proof valves, the two adjacent battery cell poles being connected via a battery cell connecting bus bar.

9. The battery top and bottom double-sided liquid cooling structure according to claim 1, characterized in that, The area of the lower layer cold plate is greater than that of the lower layer heat-conducting pad.

10. The battery top and bottom double-sided liquid cooling structure according to claim 1, characterized in that, Both the upper layer cold plate and the lower layer cold plate comprise a serpentine flow channel.

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