CN218939804U - Battery pack liquid cooling system - Google Patents

Abstract

The utility model belongs to the technical field of battery cooling, and discloses a battery pack liquid cooling system, which is arranged on a battery pack, wherein the battery pack comprises a box body and a plurality of electric cores arranged on the box body, the battery pack liquid cooling system comprises a liquid cooling plate, a butt joint insertion pipe and a liquid cooling pipeline, the liquid cooling plate is provided with a plurality of liquid inlets and liquid outlets and is sequentially arranged between two adjacent electric cores, the liquid cooling plate is provided with a liquid inlet and a liquid outlet, the two adjacent liquid inlets and the two adjacent liquid outlets are communicated through the butt joint insertion pipe, the liquid inlets and the butt joint insertion pipes on the side form a liquid inlet channel together, the liquid outlets and the butt joint insertion pipes on the side form a liquid outlet channel together, an adjusting piece capable of adjusting the opening degree is arranged on the butt joint insertion pipe, and the cooling pipeline comprises a liquid inlet pipe communicated with the liquid inlet channel and a liquid outlet pipe communicated with the liquid outlet channel. The battery pack liquid cooling system provided by the utility model effectively increases the heat dissipation area and can adjust the flow of the refrigerant in the liquid inlet channel and the liquid outlet channel.

Description

Battery pack liquid cooling system

Technical Field

The utility model relates to the technical field of battery cooling, in particular to a battery pack liquid cooling system.

Background

At present, to traditional battery package liquid cooling system, a plurality of liquid cooling boards pile up the bottom that sets up at the battery package box, and the liquid cooling board passes through the bolt, friction stir welding, mode such as sticky is connected with the box to support between liquid cooling board and the box through the silicon bubble is cotton. By adopting the arrangement, a plurality of liquid cooling plates are stacked to occupy more height space inside the battery pack, and the liquid cooling plates are only in contact with the bottom surface of the battery cell, so that the heat dissipation area between the liquid cooling plates and the battery cell is small, and the heat dissipation efficiency is low. In addition, the flow rate of the cooling fluid flowing through the cooling plate in the traditional battery pack cooling system is basically unchanged, and the flow rate of the cooling fluid flowing through the liquid cooling plate can not be correspondingly adjusted according to the condition that the isothermal temperature suddenly rises when a certain module in the battery pack is out of control.

Disclosure of Invention

The utility model aims to provide a battery pack liquid cooling system which can effectively increase the contact area with a battery core, enhance the heat dissipation effect and regulate the flow of a refrigerant flowing through a liquid cooling plate.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a battery package liquid cooling system, locates on the battery package, the battery package includes the box with locate a plurality of electric cores on the box, a plurality of electric core is followed box length direction arranges and sets up, battery package liquid cooling system includes:

the liquid cooling plates are provided with a plurality of liquid inlets and liquid outlets and are sequentially arranged between two adjacent electric cores;

the liquid inlet and the liquid outlet are communicated with each other through the butt joint cannulas, the liquid inlet and the butt joint cannulas on one side of the liquid inlet form a liquid inlet channel together, the liquid outlet and the butt joint cannulas on one side of the liquid outlet form a liquid outlet channel together, the butt joint cannulas are provided with adjusting pieces, and the adjusting pieces can adjust the opening of the corresponding butt joint cannulas;

the cooling pipeline comprises a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe is communicated with the liquid inlet channel, and the liquid outlet pipe is communicated with the liquid outlet channel.

Optionally, the device further comprises a control element arranged on the box body, the adjusting element is in communication connection with the control element, the control element can detect the temperature of the battery cell, and the adjusting element is controlled according to the detected temperature data to adjust the opening of the corresponding butt joint insertion tube.

Optionally, the adjusting piece comprises a driving device and a movable plug; wherein, the liquid crystal display device comprises a liquid crystal display device,

the movable plug is arranged in the butt joint insertion pipe, and can rotate relative to the butt joint insertion pipe to adjust the opening of the butt joint insertion pipe;

the driving device is in communication connection with the control element, and the driving device can drive the movable plug to rotate.

Optionally, the driving means is arranged to drive a motor.

Optionally, a connection plug is arranged on the docking cannula, the connection plug can be plugged into a wire harness, and the driving device is electrically connected with the control element through the wire harness.

Optionally, the liquid inlet pipe is communicated with the liquid inlet at the end part of the liquid inlet channel, and the liquid outlet pipe is communicated with the liquid outlet at the end part of the liquid outlet channel.

Optionally, each liquid cooling plate is attached to two adjacent electric cores.

Optionally, a heat insulating member is disposed between the battery cell and the case.

Optionally, the insulation is provided as an aerogel.

Optionally, the battery core is connected with the box body through structural adhesive.

The beneficial effects are that:

according to the battery pack liquid cooling system provided by the utility model, the refrigerant is introduced into the liquid inlet pipe, flows into the liquid inlet channel through the liquid inlet pipe, and is distributed into the plurality of liquid cooling plates through the plurality of liquid inlet ports to absorb heat generated by the battery core, and then the refrigerant after absorbing the heat flows out through the liquid outlets of the liquid cooling plates and is converged in the liquid outlet channel, and finally flows out through the liquid outlet pipe, so that heat dissipation is realized in a circulating and reciprocating mode. The plurality of battery cells are arranged along the length direction of the box body, the plurality of liquid cooling plates are sequentially arranged between two adjacent battery cells, the heat dissipation area between the liquid cooling plates and the battery cells can be effectively increased, the heat dissipation effect is enhanced, the whole space of the battery pack is saved, and further, the cost, the energy density and the volume grouping rate are better controlled. In addition, be equipped with the regulating part on the butt joint intubate, the opening of butt joint intubate that the regulating part can be adjusted corresponds, and then can adjust the refrigerant flow in feed liquor passageway and the drain passageway to carry out directional cooling to the high electric core of temperature, guarantee that the electric core is in safe operating temperature in the battery package.

Drawings

FIG. 1 is a schematic diagram of a battery pack liquid cooling system according to the present utility model installed at a viewing angle on a battery pack;

FIG. 2 is an enlarged schematic view of a portion of the present utility model at A in FIG. 1;

FIG. 3 is a schematic view of a battery pack liquid cooling system according to the present utility model in another view of the battery pack;

FIG. 4 is an enlarged schematic view of a portion of the present utility model at B in FIG. 3;

FIG. 5 is a schematic view of the refrigerant flow path of the battery pack liquid cooling system of the present utility model with each docking cannula open;

FIG. 6 is a schematic diagram of a coolant flow path of the battery pack cooling system of the present utility model for directional cooling of multiple thermoelectric cells;

FIG. 7 is a schematic view of the structure of the docking cannula of the present utility model;

fig. 8 is a schematic structural view of an adjusting member of the present utility model.

In the figure:

100. a liquid cooling plate; 101. a liquid inlet; 102. a liquid outlet; 110. a heat insulating member;

200. docking a cannula; 210. an adjusting member; 211. a movable plug; 212. a driving motor; 220. a wiring plug;

300. a cooling pipeline; 310. a liquid inlet pipe; 320. a liquid outlet pipe;

400. a control element; 410. a wire harness;

510. a case; 520. and a battery cell.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a battery pack liquid cooling system, referring to fig. 1 to 4, the battery pack liquid cooling system is disposed on a battery pack, the battery pack includes a case 510 and a plurality of battery cells 520 disposed on the case 510, and the plurality of battery cells 520 are arranged along a length direction of the case 510. The battery pack liquid cooling system comprises a plurality of liquid cooling plates 100, a plurality of butt joint insertion pipes 200 and a cooling pipeline 300, wherein the liquid cooling plates 100 are sequentially arranged between two adjacent electric cores 520, and the liquid cooling plates 100 are provided with a liquid inlet 101 and a liquid outlet 102. The plurality of liquid inlets 101 are located on a first side of the tank 510, and the plurality of liquid outlets 102 are located on a second side of the tank 510. Two adjacent liquid inlets 101 and two adjacent liquid outlets 102 are communicated through butt joint cannulas 200, a plurality of liquid inlets 101 and a plurality of butt joint cannulas 200 positioned on one side of the liquid inlets 101 jointly form a liquid inlet channel (not shown), a plurality of liquid outlets 102 and a plurality of butt joint cannulas 200 positioned on one side of the liquid outlets 102 jointly form a liquid outlet channel (not shown), an adjusting piece 210 is arranged on each butt joint cannulas 200, and the adjusting piece 210 can adjust the opening of the corresponding butt joint cannulas 200. The cooling pipeline 300 comprises a liquid inlet pipe 310 and a liquid outlet pipe 320, wherein the liquid inlet pipe 310 is communicated with the liquid inlet channel, and the liquid outlet pipe 320 is communicated with the liquid outlet channel.

In this embodiment, when the battery pack cooling system is in use, the refrigerant is introduced into the liquid inlet pipe 310, flows into the liquid inlet channel through the liquid inlet pipe 310, and is split-flowed into the plurality of liquid cooling plates 100 through the plurality of liquid inlets 101 to absorb the heat generated by the electric core 520, and then flows out through the liquid outlets 102 of the respective liquid cooling plates 100 and is converged in the liquid outlet channel, and finally flows out through the liquid outlet pipe 320, so that the heat dissipation is realized in a cyclic and reciprocating manner. The plurality of electric cores 520 are arranged along the length direction of the box 510, the plurality of liquid cooling plates 100 are sequentially arranged between two adjacent electric cores 520, the heat dissipation area between the liquid cooling plates 100 and the electric cores 520 can be effectively increased, the heat dissipation effect is enhanced, the whole space of a battery pack is saved, and further, the cost, the energy density and the volume grouping rate are better controlled.

In addition, be equipped with regulating part 210 on the butt joint intubate 200, regulating part 210 can adjust the aperture of corresponding butt joint intubate 200, and then can adjust the refrigerant flow in feed liquor passageway and the drain passageway to carry out directional cooling to the high electric core 520 of temperature, guarantee that electric core 520 is in safe operating temperature in the battery package.

In this embodiment, the refrigerant is preferably cooling water.

Specifically, referring to fig. 1 and 5, when the adjusting members 210 in each docking cannula 200 open the docking cannula 200 to the same opening, as shown by the direction indicated by the arrow in fig. 5, the refrigerant flows into the liquid inlet channel through the liquid inlet pipe 310, then flows into the liquid inlets 101 and into the corresponding liquid cooling plate 100 in sequence, the refrigerant can absorb the heat emitted by the corresponding electric core 520 during the flowing process in the liquid cooling plate 100, cool the electric core 520, and then flows out through the liquid outlets 102 of the respective liquid cooling plates 100 and is converged in the liquid outlet channel in sequence, and finally flows out through the liquid outlet pipe 320, so as to be circulated and reciprocated. The refrigerant flow in each liquid cooling plate 100 is consistent in the process, so that each battery cell 520 can be reliably and effectively cooled, and the refrigerant flow stroke and the resistance along the way are the same in the process.

For example, referring to fig. 6, when the temperature of the battery cell 520 shown in fig. 6 suddenly increases due to thermal runaway, the adjusting member 210 of the docking pin 200 located on the right and connected to the liquid inlet 101 of the liquid cooling plate 100 corresponding to the battery cell 520 with the abnormally increased temperature in fig. 6 is adjusted to reduce the opening of the docking pin 200 or completely close the docking pin 200, and the adjusting member 210 of the docking pin 200 located on the left and connected to the liquid outlet 102 of the liquid cooling plate 100 corresponding to the battery cell 520 with the abnormally increased temperature in fig. 6 is adjusted to reduce the opening of the docking pin 200 or completely close the docking pin 200, so that more refrigerant can flow in the direction indicated by the arrow in fig. 6, and more refrigerant can flow through the liquid cooling plates 100 on both sides of the battery cell 520 with the abnormally increased temperature to directionally cool the battery cell 520 with the excessively high temperature, thereby achieving the effect of inhibiting the thermal runaway of the battery cell 520 with the failure.

In this embodiment, each liquid cooling plate 100 is attached to two adjacent electric cores 520. By the arrangement, the heat dissipation effect on the battery cell 520 can be further improved.

In this embodiment, the battery cell 520 is connected to the case 510 through a structural adhesive. The adhesive connection between the battery cell 520 and the case 510 is simple and reliable, and external connectors such as bolts are not required.

In this embodiment, as shown in fig. 1 to 4, the battery pack liquid cooling system further includes a control element 400 disposed on the box 510, the adjusting element 210 is connected to the control element 400 in a communication manner, and the control element 400 can detect the temperature of the battery cell 520 and control the adjusting element 210 according to the detected temperature data to adjust the opening of the corresponding docking cannula 200. Specifically, a plurality of temperature sensors (not shown) are disposed in the battery pack, the temperature sensors can detect the temperatures of the plurality of electric cores 520 in the battery pack in real time, and send the temperature data of each electric core 520 to the control element 400 in real time, when the control element 400 receives the temperature data of an electric core 520 with an excessively high temperature, the control element 400 will control the adjusting element 210 of the docking cannula 200 (refer to the docking cannula at the corresponding position in fig. 6) at the position corresponding to the electric core 520 with the excessively high temperature, so that the opening degree of the corresponding docking cannula 200 can be reduced or completely closed by the adjusting element 210, thereby enabling the refrigerant to flow as soon as possible according to the flow path shown in fig. 6, and further performing rapid directional cooling on the electric core 520 with the excessively high temperature.

In this embodiment, the control element 400 may be a PCB board, a PLC controller, or other control devices, which will not be described in detail herein.

Specifically, referring to fig. 1 and fig. 7 to 8, the adjusting member 210 includes a driving device and a movable plug 211, wherein the movable plug 211 is disposed in the docking cannula 200, the movable plug 211 can rotate relative to the docking cannula 200 to adjust the opening of the docking cannula 200, the driving device is in communication connection with the control element 400, and the driving device can drive the movable plug 211 to rotate. Specifically, the movable plug 211 is configured as a cylindrical plug, the outer peripheral wall of the movable plug 211 is adapted to the inner wall of the docking cannula 200, and when the movable plug 211 rotates to a position coaxial with the docking cannula 200, the movable plug 211 can completely plug the docking cannula 200.

As an alternative embodiment, the drive means is arranged to drive the motor 212. The fixed end of the driving motor 212 is arranged on the butt joint insertion pipe 200, an output shaft of the driving motor 212 is connected with the movable plug, and the rotation of the output shaft of the driving motor 212 can drive the movable plug 211 to rotate so as to realize the rotation control of the movable plug 211.

Further, a connection plug 220 is provided on the docking cannula 200, the connection plug 220 can be plugged into a wire harness 410, and the driving device is electrically connected with the control element 400 through the wire harness 410. Specifically, the wire harness 410 includes a power line and a signal line, the control element 400 can directly supply power to the driving device through the power line, and the control element 400 can perform communication control on the driving device through the signal line, so that the driving device controls the movable plug 211 to rotate.

In this embodiment, the liquid inlet pipe 310 is disposed in communication with the liquid inlet 101 at the end of the liquid inlet channel, and the liquid outlet pipe 320 is disposed in communication with the liquid outlet 102 at the end of the liquid outlet channel. The arrangement can lead the refrigerant to be split into the liquid inlets 310 through the liquid inlet channels, and the whole process of flowing into the liquid outlet pipe 320 after converging to the liquid outlet channels is more reliable and stable.

In the present embodiment, a heat insulation member 110 is disposed between the battery cell 520 and the case 510. The heat insulation member 110 can effectively prevent heat generated by the battery cell 520 from being transferred to the box body 510, and prevent the box body 510 from heating together so as to increase the temperature of the whole battery pack. Preferably, the insulation 110 is provided as an aerogel. The aerogel is light, and the heat conductivity coefficient is generally 0.02W/mK, which is only 1/13 of that of polytetrafluoroethylene, thus having good heat insulation performance.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The utility model provides a battery package liquid cooling system, locates on the battery package, the battery package includes box (510) and locates a plurality of electric core (520) on box (510), a plurality of electric core (520) are followed box (510) length direction arranges and sets up, its characterized in that, battery package liquid cooling system includes:

the liquid cooling plates (100) are provided with a plurality of liquid inlets (101) and liquid outlets (102) and are sequentially arranged between two adjacent electric cores (520);

the device comprises a butt joint insertion pipe (200), two adjacent liquid inlets (101) and two adjacent liquid outlets (102) are communicated through the butt joint insertion pipe (200), a plurality of liquid inlets (101) and a plurality of butt joint insertion pipes (200) positioned on one side of the liquid inlets (101) form a liquid inlet channel together, a plurality of liquid outlets (102) and a plurality of butt joint insertion pipes (200) positioned on one side of the liquid outlets (102) form a liquid outlet channel together, an adjusting piece (210) is arranged on the butt joint insertion pipe (200), and the adjusting piece (210) can adjust the opening of the corresponding butt joint insertion pipe (200);

the cooling pipeline (300) comprises a liquid inlet pipe (310) and a liquid outlet pipe (320), wherein the liquid inlet pipe (310) is communicated with the liquid inlet channel, and the liquid outlet pipe (320) is communicated with the liquid outlet channel.

2. The battery pack liquid cooling system according to claim 1, further comprising a control element (400) disposed on the case (510), wherein the adjusting element (210) is in communication connection with the control element (400), and the control element (400) is capable of detecting a temperature of the electric core (520) and controlling the adjusting element (210) according to the detected temperature data to adjust an opening of the corresponding docking cannula (200).

3. The battery pack cooling system of claim 2, wherein the adjustment member (210) comprises a drive device and a movable plug (211); wherein, the liquid crystal display device comprises a liquid crystal display device,

the movable plug (211) is arranged in the butt joint insertion pipe (200), and the movable plug (211) can rotate relative to the butt joint insertion pipe (200) to adjust the opening of the butt joint insertion pipe (200);

the driving device is in communication connection with the control element (400), and the driving device can drive the movable plug (211) to rotate.

4. A battery pack cooling system according to claim 3, wherein the drive means is arranged to drive a motor (212).

5. A battery pack cooling system according to claim 3, wherein a connection plug (220) is provided on the docking cannula (200), the connection plug (220) being capable of plugging in a wire harness (410), the driving device being electrically connected to the control element (400) via the wire harness (410).

6. The battery pack liquid cooling system of claim 1, wherein the liquid inlet pipe (310) is disposed in communication with the liquid inlet (101) at the end of the liquid inlet channel, and the liquid outlet pipe (320) is disposed in communication with the liquid outlet (102) at the end of the liquid outlet channel.

7. The battery pack liquid cooling system of claim 1, wherein each liquid cooling plate (100) is disposed in close proximity to two adjacent cells (520).

8. The battery pack cooling system of claim 1, wherein a thermal insulator (110) is disposed between the cell (520) and the housing (510).

9. The battery pack cooling system of claim 8 wherein said insulation (110) is provided as an aerogel.

10. The battery pack cooling system of claim 1, wherein the cells (520) are connected to the housing (510) by a structural adhesive.

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