Two-dimensional liquid cooling battery module structure

Abstract

The utility model provides a two-dimensional liquid-cooled battery module structure. The two-dimensional liquid-cooled battery module structure comprises a first end plate, a second end plate, a liquid-cooled bottom plate and a battery cell module, the battery cell module is arranged on the liquid cooling bottom plate; the first end plate is arranged at one end of the battery cell module, and the second end plate is arranged at the other end of the battery cell module; a water cooling pipe is arranged at the top of the battery cell module and extends from one end of the battery cell module to the other end of the battery cell module; the battery cell module comprises a plurality of battery cell single bodies, a heat-conducting insulating plate is arranged between every two adjacent battery cell single bodies, and the heat-conducting insulating plates abut against the liquid cooling bottom plate, the battery cell single bodies and the water cooling pipes respectively. According to the invention, simultaneous cooling of the bottom and the top of the battery cell can be realized, so that more uniform temperature of the battery cell can be effectively guaranteed, the condition that the bottom of the battery cell is cold and the top of the battery cell is hot is avoided, the most favorable temperature condition can be better provided for the battery cell, and the cycle life of the battery cell can be effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a two-dimensional liquid-cooled battery module structure. Background Art

[0002] With the rise and development of new energy, the application scenarios of lithium batteries are increasing. Lithium batteries are a common rechargeable battery and have become the focus of my country's energy structure transformation. With the rapid development of lithium battery technology, lithium batteries are widely used in mobile devices and electric vehicles. However, no matter which application scenario the lithium battery is used in, it faces the problem of heat dissipation. It is easy to have the risk of thermal runaway due to uneven heat dissipation or untimely heat dissipation, which makes it inevitable that the battery pack will catch fire due to thermal runaway of the lithium battery, posing a great safety hazard. Utility Model Content

[0003] The present invention provides a dual-dimensional liquid-cooled battery module structure, which aims to solve the problems of uneven heat dissipation or untimely heat dissipation of existing lithium batteries, which may lead to thermal runaway and cause fire of the battery pack, and may pose a major safety hazard.

[0004] To achieve the above-mentioned purpose, the embodiment of the utility model provides a two-dimensional liquid-cooled battery module structure, comprising a first end plate, a second end plate, a liquid-cooled bottom plate and a battery module; the battery module is arranged on the liquid-cooled bottom plate; the first end plate is arranged at one end of the battery module, and the second end plate is arranged at the other end of the battery module; a water-cooling pipe is arranged on the top of the battery module, and the water-cooling pipe extends from one end of the battery module to the other end;

[0005] The battery module includes a plurality of battery cells, and a heat-conducting insulating plate is arranged between adjacent battery cells. The heat-conducting insulating plate is respectively in contact with the liquid-cooling bottom plate, the battery cells, and the water-cooling pipe.

[0006] As a preferred embodiment, the water cooling tube is a serpentine water cooling tube, and the serpentine water cooling tube is respectively in contact with the top of each of the heat conductive insulating plates and the top of each of the battery cells.

[0007] As a preferred embodiment, a cold water inlet is provided at one end of the serpentine water cooling pipe, and a cold water outlet is provided at the other end; the cold water inlet and the cold water outlet are both integrally formed with the serpentine water cooling pipe.

[0008] As a preferred embodiment, adjacent battery cells are connected in series via a connecting piece, and the serpentine water cooling tube is arranged below the connecting piece.

[0009] As a preferred embodiment, the connecting piece includes a first connecting portion, a hollow portion and a second connecting portion, the hollow portion is connected to the first connecting portion through a first vertical portion, and the hollow portion is connected to the second connecting portion through a second vertical portion; the hollow portion is respectively arranged perpendicularly to the first vertical portion and the second vertical portion, and the hollow portion is respectively arranged parallel to the first connecting portion and the second connecting portion.

[0010] As a preferred embodiment, a plurality of mutually parallel strip holes are arranged on the hollow portion; a heat-conducting insulating block is arranged between the hollow portion and the serpentine water-cooling tube, and the heat-conducting insulating block is respectively in contact with the hollow portion and the serpentine water-cooling tube.

[0011] As a preferred embodiment, the thickness of the thermally conductive insulating block is configured to match the height of the first vertical portion / the second vertical portion; and the height of the first vertical portion is the same as the height of the second vertical portion.

[0012] As a preferred embodiment, the thermally conductive insulating block is a thermally conductive silicone block.

[0013] As a preferred embodiment, the thermally conductive insulating plate is provided with through holes; the thermally conductive insulating plate is a thermally conductive silicone plate.

[0014] As a preferred embodiment, the first connection portion is connected to a pole of one of the adjacent battery cells, and the second connection portion is connected to a pole of another of the adjacent battery cells.

[0015] As a preferred embodiment, the first end plate and the second end plate are symmetrically arranged, and the first end plate is fixed to one end of the liquid-cooling bottom plate, and the second end plate is fixed to the other end of the liquid-cooling bottom plate.

[0016] As a preferred embodiment, a first strip-shaped protrusion is provided at one end of the liquid-cooled base plate, and a second strip-shaped protrusion is provided at the other end, and the battery cell module is arranged between the first strip-shaped protrusion and the second strip-shaped protrusion; the first end plate is fixed on the first strip-shaped protrusion, and the second end plate is fixed on the second strip-shaped protrusion.

[0017] As a preferred embodiment, the distance between the first strip-shaped protrusion and the second strip-shaped protrusion is equal to the length of the battery cell module.

[0018] As a preferred embodiment, a cold liquid inlet is provided at one end of the liquid-cooled base plate, and a cold liquid outlet is provided at the other end; the cold liquid inlet is provided on a side of the first strip-shaped protrusion away from the battery cell module, and the cold liquid outlet is provided on a side of the second strip-shaped protrusion away from the battery cell module.

[0019] As a preferred embodiment, the two-dimensional liquid-cooled battery module structure also includes a first restraining steel belt and a second restraining steel belt symmetrically arranged, the first restraining steel belt is enclosed at the top end of the outer side surface of the two-dimensional liquid-cooled battery module structure, and the second restraining steel belt is enclosed at the bottom end of the outer side surface of the two-dimensional liquid-cooled battery module structure.

[0020] Compared with the prior art, this application has the following technical effects and advantages:

[0021] The present application sets a heat-conducting insulating plate, a water-cooling tube and a liquid-cooling bottom plate, and makes the heat-conducting insulating plate abut against the water-cooling tube and the liquid-cooling bottom plate respectively, so that the heat of the battery cell can be transferred up and down through the heat-conducting insulating plate, transferred upward to the water-cooling tube for cooling, and transferred downward to the liquid-cooling bottom plate for cooling, which can achieve simultaneous cooling of the bottom and top of the battery cell, thereby effectively ensuring that the temperature of the battery cell is more uniform, so that the battery cell will not be cold at the bottom and hot at the top, and can better provide the most favorable temperature conditions for the battery cell, which can effectively improve the cycle life of the battery cell. In addition, by abutting the connecting plate with the water-cooling tube through the heat-conducting insulating block, the cooling of the battery cell and the connecting plate can be achieved at the same time. Through this application, the problems of high battery cell temperature and uneven temperature distribution during charging and discharging of lithium batteries can be effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the overall structure of a dual-dimensional liquid-cooled battery module structure according to an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A schematic structural diagram of a dual-dimensional liquid-cooled battery module structure from another angle;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of the connecting piece;

[0026] Figure 4 yes Figure 1 Schematic diagram of the structure of the thermal conductive insulation plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] Specifically, Figures 1 to 4As shown, the embodiment of the utility model provides a two-dimensional liquid-cooled battery module structure, including a first end plate 10, a second end plate 20, a liquid-cooled bottom plate 30 and a battery module 40; the battery module 40 is arranged on the liquid-cooled bottom plate 30; the first end plate 10 is arranged at one end of the battery module 40, and the second end plate 20 is arranged at the other end of the battery module 40; a water-cooling pipe 50 is arranged on the top of the battery module 40, and the water-cooling pipe 50 extends from one end of the battery module 40 to the other end;

[0033] The battery module 40 includes a plurality of battery cells 41 . A heat-conducting insulating plate 60 is disposed between adjacent battery cells 41 . The heat-conducting insulating plate 60 is respectively in contact with the liquid-cooling bottom plate 30 , the battery cells 41 , and the water-cooling tube 50 .

[0034] The structure of the present application performs two-dimensional liquid cooling on the bottom and top of the battery cell module to make the upper and lower temperatures of the battery cells more uniform; at the same time, the top liquid cooling can also cool the connecting plates between the battery cells, which can effectively prevent the heating temperature of the connecting plates from affecting the battery cells.

[0035] As a preferred embodiment, the water cooling tube 50 is a serpentine water cooling tube, and the serpentine water cooling tube is respectively in contact with the top of each of the thermally conductive insulating plates 60 and the top of each of the battery cells 41 .

[0036] As a preferred embodiment, a cold water inlet 51 is provided at one end of the serpentine water cooling pipe, and a cold water outlet 52 is provided at the other end; the cold water inlet 51 and the cold water outlet 52 are both integrally formed with the serpentine water cooling pipe.

[0037] As a preferred embodiment, the adjacent battery cells 41 are connected in series via a connecting piece 70 , and the serpentine water cooling tube is disposed below the connecting piece 70 .

[0038] As a preferred embodiment, Figure 3 As shown, the connecting piece 70 includes a first connecting portion 71, a hollow portion 72 and a second connecting portion 73, the hollow portion 72 is connected to the first connecting portion 71 through a first vertical portion 74, and the hollow portion 72 is connected to the second connecting portion 73 through a second vertical portion 75; the hollow portion 72 is perpendicularly arranged to the first vertical portion 74 and the second vertical portion 75, respectively, and the hollow portion 72 is parallelly arranged to the first connecting portion 71 and the second connecting portion 73, respectively.

[0039] As a preferred embodiment, a plurality of mutually parallel strip holes 721 are provided on the hollow portion 72; a heat-conductive insulating block 80 is provided between the hollow portion 72 and the serpentine water-cooling tube 50, and the heat-conductive insulating block 80 is respectively abutted against the hollow portion 72 and the serpentine water-cooling tube 50.

[0040] As a preferred embodiment, the thickness of the thermally conductive insulating block 80 is configured to match the height of the first vertical portion 74 / the second vertical portion 75 ; the height of the first vertical portion 74 is the same as the height of the second vertical portion 75 .

[0041] As a preferred embodiment, the thermally conductive insulating block 80 is a thermally conductive silicone block.

[0042] As a preferred embodiment, Figure 4 As shown, the heat-conducting insulating plate 60 is provided with a through hole 61; the heat-conducting insulating plate 60 is a heat-conducting silicone plate. In this way, the heat between the battery cells can be better transferred to the liquid cooling bottom plate and the water cooling pipe through the heat-conducting insulating plate, so as to cool the battery cells more quickly.

[0043] As a preferred embodiment, the first connection portion 71 is connected to a pole of one of the adjacent battery cells 41 , and the second connection portion 73 is connected to a pole of another of the adjacent battery cells 41 .

[0044] As a preferred embodiment, the first end plate 10 and the second end plate 20 are symmetrically arranged, and the first end plate 10 is fixed to one end of the liquid cooling bottom plate 30 , and the second end plate 20 is fixed to the other end of the liquid cooling bottom plate 30 .

[0045] As a preferred embodiment, the liquid-cooled base plate 30 is provided with a first strip-shaped protrusion 31 at one end and a second strip-shaped protrusion 32 at the other end, and the battery cell module 40 is arranged between the first strip-shaped protrusion 31 and the second strip-shaped protrusion 32; the first end plate 10 is fixed on the first strip-shaped protrusion 31, and the second end plate 20 is fixed on the second strip-shaped protrusion 32.

[0046] As a preferred embodiment, the distance between the first strip-shaped protrusion 31 and the second strip-shaped protrusion 32 is equal to the length of the battery cell module 40 .

[0047] As a preferred embodiment, a cold liquid inlet 33 is provided at one end of the liquid-cooled base plate 30, and a cold liquid outlet 34 is provided at the other end; the cold liquid inlet 33 is provided on the side of the first strip-shaped protrusion 31 away from the battery cell module 40, and the cold liquid outlet 34 is provided on the side of the second strip-shaped protrusion 32 away from the battery cell module 40.

[0048] As a preferred embodiment, the two-dimensional liquid-cooled battery module structure also includes a first restraining steel belt 90 and a second restraining steel belt 100 which are symmetrically arranged, wherein the first restraining steel belt 90 is arranged to surround the top end of the outer side surface of the two-dimensional liquid-cooled battery module structure, and the second restraining steel belt 100 is arranged to surround the bottom end of the outer side surface of the two-dimensional liquid-cooled battery module structure.

[0049] The structure of the present application fixes the battery cell module through end plates and restraint steel belts. A heat-conducting insulating plate is provided between the battery cells, and the battery cells are connected by connecting plates. The heat of the battery cells is exported to the liquid cooling base plate and water cooling pipes through the heat-conducting insulating plates. The bottom of the battery cell is cooled by the liquid cooling base plate, which can cool and support the battery cell. The top of the battery cell is cooled by a water cooling pipe, which is serpentine-shaped. At the same time, the water cooling pipe can cool the connecting plate through the heat-conducting insulating block.

[0050] The structure of the present application controls the temperature of the battery cell through two cooling methods, upper and lower. The two methods are coupled to each other. The side with higher temperature has greater cooling power. The cooling power can be controlled by the temperature and flow rate of the coolant.

[0051] The present application sets a heat-conducting insulating plate, a water-cooling tube and a liquid-cooling bottom plate, and makes the heat-conducting insulating plate abut against the water-cooling tube and the liquid-cooling bottom plate respectively, so that the heat of the battery cell can be transferred up and down through the heat-conducting insulating plate, transferred upward to the water-cooling tube for cooling, and transferred downward to the liquid-cooling bottom plate for cooling, which can achieve simultaneous cooling of the bottom and top of the battery cell, thereby effectively ensuring that the temperature of the battery cell is more uniform, so that the battery cell will not be cold at the bottom and hot at the top, and can better provide the most favorable temperature conditions for the battery cell, which can effectively improve the cycle life of the battery cell. In addition, by abutting the connecting piece with the water-cooling tube through the heat-conducting insulating block, the cooling of the battery cell and the connecting piece can be achieved at the same time.

[0052] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0053] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-dimensional liquid-cooled battery module structure, characterized in that: The battery module comprises a first end plate, a second end plate, a liquid cooling bottom plate and a battery module; the battery module is arranged on the liquid cooling bottom plate; the first end plate is arranged at one end of the battery module, and the second end plate is arranged at the other end of the battery module; a water cooling pipe is arranged on the top of the battery module, and the water cooling pipe extends from one end of the battery module to the other end; The battery module includes a plurality of battery cells, and a heat-conducting insulating plate is arranged between adjacent battery cells. The heat-conducting insulating plate is respectively in contact with the liquid-cooling bottom plate, the battery cells, and the water-cooling pipe.

2. The dual-dimensional liquid-cooled battery module structure according to claim 1, characterized in that: The water cooling tube is a serpentine water cooling tube, and the serpentine water cooling tube is respectively in contact with the top of each of the heat-conducting insulating plates and the top of each of the battery cells.

3. The dual-dimensional liquid-cooled battery module structure according to claim 2, characterized in that: One end of the serpentine water cooling pipe is provided with a cold water inlet, and the other end is provided with a cold water outlet; the cold water inlet and the cold water outlet are both integrally formed with the serpentine water cooling pipe; The adjacent battery cells are connected in series via a connecting piece, and the serpentine water cooling tube is arranged below the connecting piece.

4. The dual-dimensional liquid-cooled battery module structure according to claim 3, characterized in that: The connecting piece includes a first connecting portion, a hollow portion and a second connecting portion, the hollow portion is connected to the first connecting portion through a first vertical portion, and the hollow portion is connected to the second connecting portion through a second vertical portion; the hollow portion is respectively arranged perpendicular to the first vertical portion and the second vertical portion, and the hollow portion is respectively arranged parallel to the first connecting portion and the second connecting portion.

5. The dual-dimensional liquid-cooled battery module structure according to claim 4, characterized in that: The hollow portion is provided with a plurality of strip holes parallel to each other; a heat-conducting insulating block is provided between the hollow portion and the serpentine water-cooling tube, and the heat-conducting insulating block is respectively in contact with the hollow portion and the serpentine water-cooling tube.

6. The dual-dimensional liquid-cooled battery module structure according to claim 5, characterized in that: The thickness of the thermally conductive insulating block is configured to match the height of the first vertical portion / the second vertical portion; the height of the first vertical portion is the same as the height of the second vertical portion; The thermally conductive insulating block is a thermally conductive silica gel block; The heat-conducting insulating plate is provided with through holes; the heat-conducting insulating plate is a heat-conducting silicone plate.

7. The dual-dimensional liquid-cooled battery module structure according to claim 4, characterized in that: The first connection portion is connected to a pole of one of the adjacent battery cells, and the second connection portion is connected to a pole of another of the adjacent battery cells.

8. The dual-dimensional liquid-cooled battery module structure according to claim 1, characterized in that: The first end plate and the second end plate are symmetrically arranged, and the first end plate is fixed to one end of the liquid cooling bottom plate, and the second end plate is fixed to the other end of the liquid cooling bottom plate.

9. The dual-dimensional liquid-cooled battery module structure according to claim 8, characterized in that: The liquid cooling base plate is provided with a first strip-shaped protrusion at one end and a second strip-shaped protrusion at the other end, and the battery cell module is provided between the first strip-shaped protrusion and the second strip-shaped protrusion; the first end plate is fixed on the first strip-shaped protrusion, and the second end plate is fixed on the second strip-shaped protrusion.

10. The dual-dimensional liquid-cooled battery module structure according to claim 9, characterized in that: The distance between the first strip protrusion and the second strip protrusion is equal to the length of the battery cell module; A cold liquid inlet is provided at one end of the liquid cooling bottom plate, and a cold liquid outlet is provided at the other end; the cold liquid inlet is provided on a side of the first strip protrusion away from the battery cell module, and the cold liquid outlet is provided on a side of the second strip protrusion away from the battery cell module; The two-dimensional liquid-cooled battery module structure also includes a first restraining steel belt and a second restraining steel belt symmetrically arranged, the first restraining steel belt is enclosed at the top end of the outer side surface of the two-dimensional liquid-cooled battery module structure, and the second restraining steel belt is enclosed at the bottom end of the outer side surface of the two-dimensional liquid-cooled battery module structure.

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