CN115714212A - Battery core cooling structure and battery cooling system - Google Patents

Abstract

The embodiment of the invention provides a battery core cooling structure and a battery cooling system, and relates to the technical field of battery thermal management. The battery core cooling structure comprises a plurality of battery cores and a cold plate, wherein the battery cores are arranged in sequence, and the arrangement direction of the battery cores is consistent with the length direction of the cold plate; be provided with the first runner that supplies the coolant liquid circulation on the cold plate, the length direction of first runner is unanimous with the length direction of cold drawing, and the cold drawing sets up in one side of the utmost point post of electric core for cool off the utmost point post of electric core, it can cool off the utmost point post of electric core.

Description

Battery cooling structure and battery cooling system

technical field

The present invention relates to the technical field of battery heat management, in particular to a battery cooling structure and a battery cooling system.

Background technique

At present, new energy vehicles have increasingly urgent requirements for charging speed. Fast charging is achieved in the pursuit of high battery life, but the heat generated by the battery is significantly increased during high-rate fast charging, which puts forward higher requirements for the battery thermal management system.

Most of the existing battery thermal management systems reduce the temperature of the battery cell by cooling the bottom or side of the battery cell. In the case of high-rate charging and discharging, most of the heat of the battery cell is concentrated at the pole of the battery cell. The traditional thermal management solution cannot meet the cooling requirements. need.

Contents of the invention

The object of the present invention includes, for example, to provide a cell cooling structure capable of cooling the pole of the cell.

The object of the present invention also includes, for example, providing a battery cooling system, which can cool down the pole of the battery cell.

Embodiments of the present invention can be realized like this:

An embodiment of the present invention provides a cell cooling structure, which includes a cell and a cold plate. The direction is consistent with the length direction of the cold plate; the cold plate is provided with a first flow channel for cooling liquid to circulate, the length direction of the first flow channel is consistent with the length direction of the cold plate, and the cold plate is set On one side of the pole of the electric core, used for cooling the pole of the electric core.

Optionally, the cold plate is also provided with a second flow channel for the circulation of cooling liquid and a plurality of branch flow channels, the second flow channel is arranged in parallel with the first flow channel, and the plurality of branch flow channels They are arranged at intervals along the length direction of the cold plate, and the two ends of any one of the branch channels communicate with the first channel and the second channel respectively.

Optionally, the cold plate forms a plurality of branch channels by stamping.

Optionally, the bottom of the cold plate is bent to form a groove, an air flow channel is formed between the groove and the electric core, and an explosion-proof valve is arranged on the electric core, and the explosion-proof valve is facing the groove.

Optionally, the cold plate includes a first vertical section, a first horizontal section, a second vertical section and a second horizontal section connected in sequence, and the first horizontal section, the second vertical section and the The second horizontal section forms the groove.

Optionally, the bottom of the cell is provided with a temperature chamber, and the temperature chamber is attached to the bottom of the cold plate.

Optionally, thermal conductive glue is arranged between the vapor chamber and the cold plate.

Optionally, an aluminum bar is arranged on the pole of the electric core, and a thermal conductive glue is arranged between the aluminum bar and the cold plate.

An embodiment of the present invention also provides a battery cooling system, including the above battery cooling structure.

Optionally, a plurality of said electric cores arranged in sequence and two said cold plates form a cooling unit, and a plurality of said cooling units are arranged in sequence, and the arrangement direction of said cooling units is the same as that of a single said cooling unit The arrangement directions of the electric cores are vertical, and the two adjacent cold plates in the two adjacent cooling units are connected through pipelines.

The beneficial effects of the battery cooling structure and the battery cooling system of the embodiment of the present invention include, for example: in the case of high-rate charging and discharging, most of the heat of the battery is concentrated at the pole of the battery. On one side of the pole, when the heat is concentrated at the pole of the battery, the coolant in the first flow channel can take away the heat at the pole of the battery when it circulates, thereby cooling the pole of the battery.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a battery cooling system in an embodiment of the present application;

Fig. 2 is a partial structural schematic diagram of the cold plate used to show the first flow channel, the branch flow channel and the second flow channel in the embodiment of the present application;

Fig. 3 is a partial structural schematic diagram for showing the positional relationship between the battery cell and the cold plate in the embodiment of the present application.

Icon: 100-cell; 110-pole; 120-explosion-proof valve; 130-aluminum bar; 200-cold plate; 210-runner; 211-first runner; 212-branch runner; 213-second runner 220-groove; 230-the first vertical section; 240-the first horizontal section; 250-the second vertical section; 260-the second horizontal section;

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that if the orientation or positional relationship indicated by the terms "upper", "lower", "inner" and "outer" appear, it is based on the orientation or positional relationship shown in the drawings, or It is the orientation or positional relationship that the invention product is usually placed in use, and it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation , and therefore cannot be construed as a limitation of the present invention.

In addition, terms such as "first" and "second" are used only for distinguishing descriptions, and should not be understood as indicating or implying relative importance.

It should be noted that, in the case of no conflict, the features in the embodiments of the present invention may be combined with each other.

The inventors of the present application found that most of the heat on the battery cell is concentrated at the pole of the battery cell under the condition of high-rate charge and discharge, and the traditional thermal management scheme cannot meet the cooling demand of the battery pole. This embodiment provides a cell cooling structure and a battery cooling system, at least for solving this technical problem.

Please refer to FIG. 1-FIG. 3, the cell cooling structure provided by this embodiment includes a cell 100 and a cold plate 200, the number of cells 100 is multiple, and the plurality of cells 100 are arranged in sequence, and the rows of cells 100 The cloth direction is consistent with the length direction of the cold plate 200; the cold plate 200 is provided with a first flow channel 211 for the circulation of cooling liquid, the length direction of the first flow channel 211 is consistent with the length direction of the cold plate 200, and the cold plate 200 is arranged on the cell One side of the pole 110 of the cell 100 is used for cooling the pole 110 of the cell 100 .

It should be pointed out that the pole 110 of the battery cell 100 is arranged on the side of the battery cell 100, the first flow channel 211 is a direct flow channel 210, the cold plate 200 is provided with a water inlet and a water outlet connected to the first flow channel 211, and the cooling liquid The water flows directly from the water inlet side through the first flow channel 211 to the water outlet side. Setting the first flow channel 211 as a straight channel 210 shortens the length of the flow channel 210 and improves cooling efficiency.

In the case of high-rate charging and discharging, most of the heat of the battery cell 100 is concentrated at the pole 110 of the battery 100. By setting the cold plate 200 on one side of the pole 110 of the battery 100, when the pole 110 of the battery 100 When the heat is concentrated, the coolant in the first flow channel 211 can take away the heat from the pole 110 of the battery cell 100 when circulating, thereby cooling the pole 110 of the battery cell 100 .

In an optional embodiment, the cold plate 200 is also provided with a second flow channel 213 for the circulation of cooling liquid and a plurality of branch flow channels 212, the second flow channel 213 is arranged in parallel with the first flow channel 211, and the plurality of branch flow channels The channels 212 are arranged at intervals along the length direction of the cold plate 200 , and two ends of any branch channel 212 communicate with the first channel 211 and the second channel 213 respectively.

It should be pointed out that the first flow channel 211 is close to the pole 110 of the battery cell 100, and the second flow channel 213 is close to the bottom of the battery cell 100; Of course, in other embodiments, the water inlet and water outlet on the cold plate 200 can also be set on the first flow channel 211 or the second flow channel 213 .

When the cooling liquid is passed into the cold plate 200, the cooling liquid flows directly from the water inlet to the water outlet through the first flow channel 211 and the second flow channel 213, taking away the heat of the battery cell 100, and at the same time the cooling liquid flows in the multiple branch flow channels 212 Through circulation, the plurality of branch flow channels 212 realize the communication between the first flow channel 211 and the second flow channel 213 , and play a role of equalizing the temperature of the coolant in the first flow channel 211 and the second flow channel 213 .

In an optional embodiment, the cold plate 200 forms a plurality of branch channels 212 by stamping.

It should be noted that the plate surface on one side of the cold plate 200 is inwardly recessed by punching to fit the plate surface on the opposite side, thereby forming a plurality of spaced branch flow channels 212 in the length direction of the cold plate 200. The branch flow channels 212 are evenly spaced, which can better balance the temperature of the cooling liquid in the first flow channel 211 and the second flow channel 213 .

In an optional embodiment, the bottom of the cold plate 200 is bent to form a groove 220, and an air flow channel 210 is formed between the groove 220 and the battery cell 100, and the battery cell 100 is provided with an explosion-proof valve 120, and the explosion-proof valve 120 is facing groove 220 .

It should be pointed out that the groove 220 and the side of the battery cell 100 provided with the pole 110 jointly form the air flow channel 210 , and the explosion-proof valve 120 faces the inner wall of the groove 220 .

When thermal runaway occurs in the battery cell 100 , the high-temperature gas in the explosion-proof valve 120 rushes out, and the air channel 210 can guide the high-temperature gas so that the high-temperature gas can be quickly discharged through the air channel 210 to improve safety.

In an optional embodiment, the cold plate 200 includes a first vertical segment 230, a first horizontal segment 240, a second vertical segment 250 and a second horizontal segment 260 connected in sequence, the first horizontal segment 240, the second vertical segment The straight section 250 and the second horizontal section 260 form the groove 220 .

It should be pointed out that the first flow channel 211 is set in the first vertical section 230, and the first vertical section 230 is close to the pole 110 of the battery cell 100, and the cold plate 200 is bent to form the first vertical section 230 connected in sequence , the first horizontal section 240, the second vertical section 250 and the second horizontal section 260, wherein the first vertical section 230 is parallel to the side of the battery cell 100, and the first horizontal section 240 faces away from the side of the battery cell 100 Bending, the second vertical section 250 is parallel to the first vertical section 230, the second flow channel 213 is arranged on the second horizontal section 260, the second horizontal section 260 is bent toward the side of the battery core 100, and the second The horizontal section 260 is parallel to the first horizontal section 240 , and the end of the second horizontal section 260 away from the second vertical section 250 abuts against the side of the battery cell 100 .

The water inlet and the water outlet on the cold plate 200 are arranged on the first horizontal section 240, and the water inlet and the water outlet are respectively connected with a water inlet joint and a water outlet joint. It can be understood that, in other embodiments, the water outlet on the cold plate 200 The water inlet and water outlet can also be arranged on the first vertical section 230 , the second vertical section 250 or the second horizontal section 260 .

It should be pointed out that the first vertical section 230 of the cold plate 200 is in contact with the poles 110 of the plurality of battery cells 100 through heat-conducting glue, so that the heat on the poles 110 of the multiple battery cells 100 can be simultaneously conducted to the corresponding poles. On the cold plate 200 of the battery cell 100 , heat dissipation can be achieved.

In an optional embodiment, a temperature chamber 300 is provided at the bottom of the cell 100 , and the temperature chamber 300 is attached to the bottom of the cold plate 200 .

It should be pointed out that the second horizontal section 260 is attached to the vapor chamber 300, and the vapor chamber 300 is made of a superconducting material, so that when the vapor chamber 300 is attached to the second horizontal section 260, the electrical The heat at the bottom of the core 100 is quickly transferred to the second channel 213 for heat dissipation. In an optional embodiment, thermal conductive glue is disposed between the temperature chamber 300 and the cold plate 200 .

It should be pointed out that the temperature chamber 300 is parallel to the second horizontal section 260 , and a thermal conductive glue is arranged between the temperature chamber 300 and the second horizontal section 260 of the cold plate 200 .

By arranging heat conduction glue between the vapor chamber 300 and the cold plate 200 , the heat conduction resistance can be reduced, the heat conduction efficiency can be improved, and the heat at the bottom of the battery cell 100 can be quickly conducted to the cold plate 200 for heat dissipation.

In an optional embodiment, an aluminum bar 130 is disposed on the pole 110 of the battery cell 100 , and a thermal conductive glue is disposed between the aluminum bar 130 and the cold plate 200 .

It should be pointed out that thermal conductive glue is disposed between the aluminum bar 130 and the first vertical section 230 of the cold plate 200 .

By arranging heat conduction glue between the aluminum bar 130 and the cold plate 200 , the heat conduction resistance can be reduced, the heat conduction efficiency can be improved, and the heat of the pole 110 of the battery cell 100 can be rapidly conducted to the cold plate 200 for heat dissipation.

In an optional embodiment, the pole 110 of the battery cell 100 includes a positive pole and a negative pole, and the positive pole and the negative pole are respectively arranged on opposite sides of the battery 100. There are two cold plates 200, one of which is a cold plate. The plate 200 is arranged on one side of the positive pole, and the other cold plate 200 is arranged on one side of the negative pole, and the two cold plates 200 are connected.

It should be noted that the positive pole and the negative pole of the battery cell 100 respectively correspond to two cold plates 200 , and the two cold plates 200 are connected through water pipes.

When the heat is concentrated at the positive pole and the negative pole of the battery cell 100, the cooling liquid in the two cold plates 200 can take away the heat at the positive pole and the negative pole when they circulate, thereby cooling the positive pole and the negative pole of the battery cell 100. The negative pole is cooled at the same time.

In addition, this embodiment also provides a battery cooling system, which includes the above-mentioned cell cooling structure.

In an optional embodiment, a plurality of battery cells 100 arranged in sequence and two cold plates 200 form a cooling unit, and the plurality of cooling units are arranged in sequence, and the arrangement direction of the cooling units is the same as that of the cells 100 in a single cooling unit. The arrangement directions are perpendicular to each other, and the two adjacent cold plates 200 in the two adjacent cooling units are connected through pipelines.

For example, there are two cooling units, and two adjacent cold plates 200 in the two cooling units are connected through pipelines. It can be understood that the pipelines may be water pipes or oil pipes, and the number of cooling units may also be determined according to actual working conditions.

In summary, the embodiment of the present invention provides a cell cooling structure and a battery cooling system. In the case of high-rate charging and discharging, most of the heat of the cell 100 is concentrated at the pole 110 of the cell 100. By placing the cold plate 200 is arranged on one side of the pole 110 of the battery cell 100. When the heat at the pole 110 of the battery cell 100 is concentrated, the cooling liquid in the first flow channel 211 can carry the heat at the pole 110 of the battery cell 100 when it circulates. At the same time, the plurality of branch flow channels 212 can better balance the temperature of the cooling liquid in the first flow channel 211 and the second flow channel 213 .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. A cell cooling structure, characterized in that it comprises a cell (100) and a cold plate (200), the number of the cells (100) is multiple, and a plurality of cells (100) are arranged in sequence , the arrangement direction of the plurality of electric cores (100) is consistent with the length direction of the cold plate (200); The cold plate (200) is provided with a first flow channel (211) for the circulation of cooling liquid, the length direction of the first flow channel (211) is consistent with the length direction of the cold plate (200), and the cold plate (200) is arranged on one side of the pole (110) of the electric core (100), and is used for cooling the pole (110) of the electric core (100). 2. The cell cooling structure according to claim 1, characterized in that, the cold plate (200) is also provided with a second flow channel (213) for the circulation of cooling liquid and a plurality of branch flow channels (212) , the second flow channel (213) is arranged parallel to the first flow channel (211), a plurality of the branch flow channels (212) are arranged at intervals along the length direction of the cold plate (200), and any one of the Both ends of the branch flow channel (212) communicate with the first flow channel (211) and the second flow channel (213) respectively. 3. The cell cooling structure according to claim 2, characterized in that, the cold plate (200) forms a plurality of branch channels (212) by stamping. 4. The cell cooling structure according to claim 1, characterized in that, the bottom of the cold plate (200) is bent to form a groove (220), and the groove (220) is connected to the cell (100) ) to form an air flow channel (210), the battery core (100) is provided with an explosion-proof valve (120), and the explosion-proof valve (120) is facing the groove (220). 5. The cell cooling structure according to claim 4, characterized in that, the cold plate (200) comprises a first vertical segment (230), a first horizontal segment (240), a second vertical segment connected in sequence segment (250) and a second horizontal segment (260), said first horizontal segment (240), said second vertical segment (250) and said second horizontal segment (260) forming said groove (220 ). 6. The electric core cooling structure according to claim 1, characterized in that, the bottom of the electric core (100) is provided with a uniform temperature plate (300), and the uniform temperature plate (300) is connected to the cold plate ( 200) fit the bottom. 7. The cell cooling structure according to claim 6, characterized in that a thermal conductive glue is arranged between the vapor chamber (300) and the cold plate (200). 8. The electric core cooling structure according to claim 1, characterized in that, an aluminum bar (130) is arranged on the pole (110) of the electric core (100), and the aluminum bar (130) is connected to the Thermal conductive glue is arranged between the cold plates (200). 9. A battery cooling system, comprising the battery cooling structure according to any one of claims 1-8. 10. The battery cooling system according to claim 9, characterized in that, a plurality of said battery cells (100) arranged in sequence and two said cold plates (200) form a cooling unit, and a plurality of said cooling plates The units are arranged in sequence, the arrangement direction of the cooling units is perpendicular to the arrangement direction of the electric cores (100) in a single cooling unit, and the two adjacent cooling units in two adjacent cooling units The cold plates (200) are connected through pipelines.

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