An adaptive structure battery cooling system

Abstract

The utility model discloses a battery cooling system of self -adaptation structure belongs to battery processing field, including battery box, the inside battery box is provided with a plurality of battery group, and each battery group is provided with heat conduction pad, liquid cooling board and air pressure adjusting part, and the battery group is composed of a plurality of side -by -side setting electric core, and heat conduction pad is located below the battery group, and liquid cooling board is located below heat conduction pad, and air pressure adjusting part includes air cylinder adjusting mechanism, air bag temperature control unit and air pressure transmission pipeline, and air cylinder adjusting mechanism sets up at liquid cooling board bottom, is used for adjusting the height of liquid cooling board, air bag temperature control unit is composed of a plurality of independent air bags, and each air bag is set between the adjacent electric core, and the air bag is filled with gas in the inside, air pressure transmission pipeline is used for connecting air bag and air cylinder adjusting mechanism, the utility model according to battery temperature self -adaptation regulation cooling and heating effect's battery thermal management system, ensures that the battery keeps the best working condition in wide temperature range.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery technology, specifically relating to an adaptive battery cooling system. Background Technology

[0002] Lithium-ion batteries exhibit significant performance variations under different temperature conditions. In low-temperature environments, the internal resistance of the battery increases, while in high-temperature environments, the battery performance degrades and may even lead to thermal runaway.

[0003] Lithium-ion batteries often face the challenge of large temperature fluctuations in actual operating environments. Existing battery thermal management systems often use fixed cooling or heating methods, which are difficult to adapt to changes in ambient temperature, resulting in energy waste or insufficient battery performance, thereby affecting the battery's lifespan. Utility Model Content

[0004] The purpose of this invention is to provide an adaptive battery cooling system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adaptive battery cooling system includes a battery housing containing several battery packs. Each battery pack includes a thermal pad, a liquid cooling plate, and a pressure regulating unit. Each battery pack consists of several cells arranged side-by-side. The thermal pad is located below the battery pack, and the liquid cooling plate is located below the thermal pad. The pressure regulating unit includes a cylinder adjustment mechanism, an airbag temperature control unit, and pressure transmission pipelines.

[0007] The cylinder adjustment mechanism is located at the bottom of the liquid cooling plate and is used to adjust the height of the liquid cooling plate;

[0008] The airbag temperature control unit consists of multiple independent airbags, each airbag is disposed between adjacent battery cells, and the airbag is filled with gas.

[0009] The air pressure transmission pipeline is used to connect the airbag and the cylinder adjustment mechanism.

[0010] By adopting the above technical solution, during use, under normal temperature conditions (20-30℃), the height of the liquid cooling plate from the bottom of the battery box is H0, the gas pressure inside the airbag is moderate, the height of the cylinder adjustment mechanism remains constant, and the system is in a balanced state. Under high temperature conditions (>30℃), the gas inside the airbag expands due to heat, pushing the cylinder adjustment mechanism to extend, raising the liquid cooling plate, and reducing the thermal resistance of the heat conduction path, thereby enabling heat to be transferred from the liquid cooling plate to the surrounding environment more quickly, enhancing the heat dissipation effect of the liquid cooling plate and improving the heat dissipation efficiency. Under low temperature conditions (<10℃), when it is necessary to heat the battery, the gas inside the airbag cools and contracts, reducing the gas pressure, lowering the height of the cylinder adjustment mechanism, increasing the thermal resistance between the liquid cooling plate and the battery pack, and reducing heat loss.

[0011] Preferably, the air pressure transmission pipeline includes a main connecting pipeline, a branch pipeline, an airbag connecting pipeline, and a cylinder connecting pipeline. Several airbag connecting pipelines are connected to the top of the main connecting pipeline. The airbag connecting pipelines are connected to the side wall of the airbag. Both ends of the main connecting pipeline are connected to branch pipelines. Several cylinder connecting pipelines are connected to the side of the branch pipelines. The cylinder connecting pipelines are connected to the cylinder adjustment mechanism.

[0012] By adopting the above technical solution, when multiple independent airbags expand due to heat, they pass through their respective connected airbag connecting pipes, then sequentially through the main connecting pipe and the branch pipe, and finally into the cylinder connecting pipe. This ensures that the airbags are evenly distributed into the cylinder adjustment mechanism, guaranteeing the stability of the force among the multiple cylinder adjustment mechanisms and further improving the heat dissipation efficiency.

[0013] Preferably, the airbag is provided with a support frame on the outside, and the support frame abuts against the battery cells on both sides.

[0014] By adopting the above technical solution, the support frame is used for airbag installation to maintain the spacing between battery cells, and is made of rigid material to limit the radial expansion of the airbag.

[0015] Preferably, the cylinder adjustment mechanism includes a piston cylinder and a linkage rod, the cavity of the piston cylinder is connected to the air pressure transmission pipeline, and the top end of the linkage rod is fixedly connected to the liquid cooling plate.

[0016] By adopting the above technical solution, gas enters the interior of the piston rod under the drive of the air pressure transmission pipeline, and drives the connecting rod to move up and down, thereby adjusting the degree of adhesion between the heat-conducting pad and the battery cell.

[0017] Preferably, the thermal pad is made of a flexible thermally conductive material.

[0018] By adopting the above technical solution, high thermal conductivity materials, such as thermally conductive silicone pads and other compressible and elastic thermal interface materials, are used to enhance the efficiency of heat transfer from the battery to the liquid cooling plate, ensuring that heat can be quickly transferred from the battery cell to the liquid cooling plate.

[0019] Preferably, the liquid cooling plate is provided with an inlet pipe and an outlet pipe at its end, and the liquid cooling plate is made of copper or aluminum.

[0020] By adopting the above technical solution, a uniform heat conduction path is formed by tightly bonding the flexible heat conduction wire with the heat conduction pad, and the copper or aluminum material ensures sufficient heat conduction area.

[0021] Preferably, the battery housing is equipped with a control system, which includes a temperature sensor and a pressure sensor. The temperature sensor is connected to the battery cell to detect the temperature of the battery cell, and the pressure sensor is connected to the airbag to detect pressure changes in the airbag.

[0022] By adopting the above technical solution, the control system can accurately detect the temperature inside the battery cell and the pressure of the airbag, and is electrically connected to the external control system. In the event of thermal runaway, timely manual intervention can be carried out to improve the vehicle's safety performance.

[0023] The technical effects and advantages of this utility model are as follows:

[0024] This invention employs a closed-loop mechanism for temperature-driven temperature control. By using an airbag to drive a liquid cooling plate, the distance between the thermal pad and the battery pack is adjusted, achieving zero-power adaptive control. This provides a cost-effective thermal management solution for new energy vehicles and energy storage systems, combining lightweight design with low cost. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0027] Figure 3 This is a schematic diagram of the air pressure regulating part in this utility model;

[0028] In the diagram: 1. Battery housing; 2. Battery pack; 21. Battery cell; 3. Thermal pad; 4. Liquid cooling plate; 41. Water inlet pipe; 42. Water outlet pipe; 5. Air pressure regulating unit; 51. Cylinder adjusting mechanism; 511. Piston cylinder; 512. Linkage rod; 52. Airbag temperature control unit; 521. Airbag; 522. Support frame; 53. Air pressure transmission pipeline; 531. Main connection pipeline; 532. Diversion pipeline; 533. Airbag connection pipeline; 534. Cylinder connection pipeline. Detailed Implementation

[0029] The following will refer to the appendix in the embodiments of this utility model. Figures 1-3 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The specific embodiments described herein are merely used to explain this utility model and are not intended to limit this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Example 1

[0031] like Figures 1-3 As shown, an adaptive battery cooling system includes a battery housing 1, inside which are arranged several battery packs 2. Each battery pack 2 is equipped with a thermal pad 3, a liquid cooling plate 4, and a pressure regulating unit 5. The battery pack 2 consists of several cells 21 arranged side by side. The thermal pad 3 is located below the battery pack 2, and the liquid cooling plate 4 is located below the thermal pad 3. The pressure regulating unit 5 includes a cylinder adjusting mechanism 51, an airbag 521, a temperature control unit 52, and a pressure transmission pipeline 53.

[0032] The cylinder adjustment mechanism 51 is located at the bottom of the liquid cooling plate 4 and is used to adjust the height of the liquid cooling plate 4;

[0033] The temperature control unit 52 of the airbag 521 is composed of multiple independent airbags 521. Each airbag 521 is located between adjacent battery cells 21 and is filled with gas. The airbag 521 is made of environmentally friendly polymer material with good airtightness and elasticity. The air interface is located at the bottom of the airbag 521 to facilitate connection to the air pressure transmission pipeline 53.

[0034] The air pressure transmission line 53 is used to connect the airbag 521 and the cylinder adjustment mechanism 51.

[0035] During use, under normal temperature conditions (20-30℃), the height of the liquid cooling plate 4 from the bottom of the battery box 1 is H0, the gas pressure inside the airbag 521 is moderate, the height of the cylinder adjustment mechanism 51 remains constant, and the system is in a balanced state. Under high temperature conditions (>30℃), the gas inside the airbag 521 expands due to heat, pushing the cylinder adjustment mechanism 51 to extend, raising the liquid cooling plate 4, reducing the thermal resistance of the heat conduction path, thereby enabling heat to be transferred from the liquid cooling plate 4 to the surrounding environment more quickly, enhancing the heat dissipation effect of the liquid cooling plate 4, and improving the heat dissipation effect. Under low temperature conditions (<10℃), when it is necessary to heat the battery, the gas inside the airbag 521 cools and contracts, the gas pressure decreases, the height of the cylinder adjustment mechanism 51 decreases, the thermal resistance between the liquid cooling plate 4 and the battery pack 2 increases, and heat loss is reduced.

[0036] The air pressure transmission pipeline 53 includes a main connecting pipeline 531, a branch pipeline 532, an airbag connecting pipeline 533, and a cylinder connecting pipeline 534. Several airbag connecting pipelines 533 are connected to the top of the main connecting pipeline 531. The airbag connecting pipelines 533 are connected to the side wall of the airbag 521. Both ends of the main connecting pipeline 531 are connected to branch pipelines 532. Several cylinder connecting pipelines 534 are connected to the side of the branch pipelines 532. The cylinder connecting pipelines 534 are connected to the cylinder adjustment mechanism 51. When multiple independent airbags 521 expand due to heat, they pass through their respective connected airbag connecting pipelines 533, then sequentially through the main connecting pipeline 531 and the branch pipelines 532, and finally into the cylinder connecting pipeline 534. The airbags then enter the cylinder adjustment mechanism 51 evenly, ensuring the stability of the force among the multiple cylinder adjustment mechanisms 51 and further improving the heat dissipation efficiency.

[0037] The airbag 521 is provided with a support frame 522 on the outside. The support frame 522 abuts against the battery cells 21 on both sides. The support frame 522 is used for the installation of the airbag 521 to maintain the spacing between the battery cells 21. On the other hand, it is made of rigid material to limit the radial expansion of the airbag 521. The rigid plastic square support frame 522 is used to ensure the dimensional stability and consistency of the battery cell 21 module during installation.

[0038] The cylinder adjustment mechanism 51 includes a piston cylinder 511 and a linkage rod 512. The cavity of the piston cylinder 511 is connected to the air pressure transmission pipeline 53. The top of the linkage rod 512 is fixedly connected to the liquid cooling plate 4. Under the drive of the air pressure transmission pipeline 53, gas enters the interior of the piston rod and drives the linkage rod to move up and down, thereby adjusting the degree of contact between the heat-conducting pad 3 and the battery cell 21.

[0039] The thermal pad 3 is made of flexible thermally conductive material, such as thermally conductive silicone pads and other compressible thermal interface materials, to enhance the efficiency of heat transfer from the battery to the liquid cooling plate 4, and to ensure that heat can be quickly transferred from the cell 21 to the liquid cooling plate 4.

[0040] The liquid cooling plate 4 is provided with an inlet pipe 41 and an outlet pipe 42 at its end. The liquid cooling plate 4 is made of copper or aluminum and is tightly attached to the heat-conducting pad 3 through a flexible heat-conducting wire to form a uniform heat conduction path. The copper or aluminum material ensures sufficient heat conduction area.

[0041] The battery housing 1 is equipped with a control system, which includes a temperature sensor and a pressure sensor. The temperature sensor is connected to the battery cell 21 to detect the temperature of the battery cell 21, and the pressure sensor is connected to the airbag 521 to detect the pressure change of the airbag 521. The control system can accurately detect the temperature inside the battery cell 21 and the pressure of the airbag 521, and is electrically connected to the external control system. When thermal runaway occurs, timely manual intervention can be performed to improve the safety performance of the vehicle. The pressure sensor is installed on the transmission channel of the airbag 521, and the temperature sensor is installed inside the battery housing 1.

[0042] In summary, this utility model uses a closed-loop mechanism of temperature-driven temperature control. By using the airbag 521 to drive the liquid cooling plate 4 to adjust the distance between the thermal pad 3 and the battery pack 2, it achieves zero-power self-adaptation, providing a cost-effective thermal management solution for new energy vehicles and energy storage systems, which is both lightweight and low-cost.

[0043] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adaptive structure battery cooling system, characterized by: The device includes a battery housing (1), which contains several battery packs (2). Each battery pack (2) is equipped with a heat-conducting pad (3), a liquid cooling plate (4), and a pressure regulating unit (5). Each battery pack (2) consists of several cells (21) arranged side by side. The heat-conducting pad (3) is located below the battery pack (2), and the liquid cooling plate (4) is located below the heat-conducting pad (3). The pressure regulating unit (5) includes a cylinder adjusting mechanism (51), an airbag (521) temperature control unit (52), and a pressure transmission pipeline (53). The cylinder adjustment mechanism (51) is located at the bottom of the liquid cooling plate (4) and is used to adjust the height of the liquid cooling plate (4); The airbag (521) temperature control unit (52) is composed of multiple independent airbags (521), each airbag (521) is disposed between adjacent battery cells (21), and the airbag (521) is filled with gas. The air pressure transmission line (53) is used to connect the airbag (521) and the cylinder adjustment mechanism (51).

2. The self-adapting structured battery cooling system of claim 1, wherein: The air pressure transmission pipeline (53) includes a main connecting pipeline (531), a branch pipeline (532), an airbag connecting pipeline (533), and a cylinder connecting pipeline (534). Several airbag connecting pipelines (533) are connected to the top of the main connecting pipeline (531). The airbag connecting pipelines (533) are connected to the side wall of the airbag (521). Both ends of the main connecting pipeline (531) are connected to branch pipelines (532). Several cylinder connecting pipelines (534) are connected to the side of the branch pipelines (532). The cylinder connecting pipelines (534) are connected to the cylinder adjustment mechanism (51).

3. The self-adapting structured battery cooling system of claim 1, wherein: The airbag (521) is provided with a support frame (522) on the outside, and the support frame (522) abuts against the battery cells (21) on both sides.

4. The self-adapting structured battery cooling system of claim 1, wherein: The cylinder adjustment mechanism (51) includes a piston cylinder (511) and a linkage rod (512). The cavity of the piston cylinder (511) is connected to the air pressure transmission pipeline (53), and the top end of the linkage rod (512) is fixedly connected to the liquid cooling plate (4).

5. The self-adapting structured battery cooling system of claim 1, wherein: The thermal pad (3) is made of flexible thermally conductive material.

6. The self-adapting structured battery cooling system of claim 1, wherein: The liquid cooling plate (4) is provided with an inlet pipe (41) and an outlet pipe (42) at its end. The liquid cooling plate (4) is made of copper or aluminum.

7. The self-adapting structured battery cooling system of claim 1, wherein: The battery housing (1) is equipped with a control system, which includes a temperature sensor and a pressure sensor. The temperature sensor is connected to the battery cell (21) and is used to detect the temperature of the battery cell (21). The pressure sensor is connected to the airbag (521) and is used to detect the pressure change of the airbag (521).

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