Battery compartment based on composite cooling technology

Abstract

The utility model discloses a battery compartment based on composite cooling technology, which comprises a safety box, a liquid cooling circulating pump, an explosion-proof valve, a temperature sensor, a frequency conversion energy-saving fan and heat insulation buffer cotton, the external liquid cooling circulating pump is connected with a circulating pipeline, under the action of the temperature sensor, data is fed back to an external controller, and the safety box is connected with the explosion-proof valve. And the battery is ensured to operate in a safe temperature interval. Four cell stacks are arranged below the temperature sensor, and anti-explosion valves are arranged on the cell stacks, so that the explosion or chain reaction of the cabin body caused by sudden pressure rise is avoided. A phase change overheating plate is connected in the middle of the cell stack, a large amount of heat can be absorbed and stored, and efficient heat management is achieved. The heat insulation buffer cotton enables the battery pack to isolate high-temperature or low-temperature transmission and absorb vibration or external impact in operation of equipment, and mechanical damage is avoided. The variable-frequency energy-saving fan is used for dynamically controlling air volume and energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, and in particular to a battery compartment based on composite cooling technology. Background Technology

[0002] With the rapid development of new energy vehicles and the energy storage industry, lithium-ion batteries, as a core power source, face severe thermal management challenges. Their temperature control directly affects battery performance, safety, and lifespan. However, current battery cooling systems still have significant shortcomings in terms of heat dissipation efficiency, environmental friendliness, and system stability. Traditional liquid cooling systems rely on harmful cooling media, are bulky, and prone to leakage; phase change materials have poor thermal conductivity and slow response; and heat pipe technology suffers from thermal hysteresis. These defects lead to low battery heat dissipation efficiency, high maintenance costs, short lifespan, and an inability to meet the instantaneous heat dissipation demands of high-rate charging and discharging. This necessitates an innovative heat dissipation device that can quickly respond to temperature fluctuations while avoiding heat buildup and structural risks, thereby improving battery safety and cycle life.

[0003] Previous battery compartment designs, such as the patent application with publication number CN 222440680U, had excessively large internal space and multiple support columns. When the battery compartment vibrated, the battery was prone to collision and explosion, exacerbating safety hazards.

[0004] While existing solutions can dissipate heat from the battery's interior, heat still accumulates on the outer surface, making rapid cooling difficult. Furthermore, during sudden braking or vibrations, loose liquid cooling lines could cause battery impacts and potentially lead to explosions, exacerbating safety hazards. Therefore, those skilled in the art are developing an intelligent battery cooling device based on composite heat dissipation technology to address the problems raised in the background. Thus, developing a highly efficient intelligent battery cooling device to improve battery thermal management performance, achieve efficient and intelligent temperature control, ensure safe and stable battery operation, and enhance battery environmental adaptability is of great significance for promoting the development of the new energy vehicle and energy storage industries. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a battery compartment based on composite cooling technology, which aims to solve the problem that although the existing solutions can conduct heat out of the battery, heat will still accumulate on the outer surface and it is difficult to cool it quickly. At the same time, when the vehicle brakes suddenly or vibrates, the loosening of the liquid cooling pipes may cause the battery to collide and explode, which exacerbates the safety hazards.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A battery compartment based on composite cooling technology includes a safety box, a battery pack loaded inside the safety box, a liquid cooling circulation mechanism located at the bottom of the battery pack inside the safety box, an air cooling heat dissipation mechanism located on the side wall of the safety box, heat insulation buffer cotton embedded between the safety box and the battery pack, an explosion-proof valve located at the top of the battery pack, and a temperature control component located inside the safety box, wherein the air cooling heat dissipation mechanism is connected to the outside.

[0008] Furthermore, the liquid cooling circulation mechanism includes a phase change superheater plate, a liquid cooling pipe, and a circulating heat dissipation pipe. The phase change superheater plate is located at the bottom of the battery pack and is in direct contact with the battery pack. The liquid cooling pipe is laid in a loop at the bottom of the safety box, and its output end is connected to the circulating heat dissipation pipe. The circulating heat dissipation pipe passes through the safety box and connects to an external liquid cooling circulation pump.

[0009] Furthermore, the air-cooled heat dissipation mechanism includes a variable frequency energy-saving fan and heat dissipation pipes. The variable frequency energy-saving fan is located on the side wall of the safety box, and the heat dissipation pipes are symmetrically arranged on opposite sides of the safety box and located above the variable frequency energy-saving fan.

[0010] Furthermore, a phase change material filling layer is provided between each pair of batteries in the battery pack.

[0011] Furthermore, the temperature control component includes a temperature sensor located at the top of the battery pack and connected to an external controller via a pipeline. The external controller is also electrically connected to the liquid cooling circulation mechanism and the air cooling heat dissipation mechanism.

[0012] Furthermore, the safety box includes a box body and a top cover. The bottom of the box body is provided with a battery compartment load-bearing base, the outside of the box body is provided with reinforcing ribs, and a battery buckle bracket is provided at the connection between the top cover and the box body.

[0013] The technical solution adopted in this utility model has the following beneficial effects:

[0014] In this application, the synergistic effect of liquid cooling and air cooling technologies significantly improves the thermal management capability and overall reliability of the battery compartment. Its core advantages are: the combined design of liquid cooling and phase change materials efficiently absorbs the heat generated by the battery, and temperature sensors combined with a controller achieve intelligent temperature balance control, effectively preventing localized overheating and extending battery life; the dynamic cooling system combined with a variable frequency energy-saving fan can flexibly adjust the heat dissipation intensity under different environmental conditions, ensuring effective heat dissipation while reducing energy waste, and resulting in more stable operation; the multi-layered protective design of explosion-proof valves, thermal insulation buffer cotton, and corrosion-resistant enclosure significantly enhances impact resistance, explosion-proof fire resistance, and chemical corrosion resistance, ensuring system safety even in electrolyte leakage or mechanical vibration scenarios. The top cover and enclosure are secured to the battery compartment with battery clip brackets, preventing battery compartment vibration and ensuring battery stability and safety during equipment operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the battery pack and intelligent temperature control system of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the load-bearing base structure of the battery compartment of this utility model;

[0019] Figure 5 This is a schematic diagram of the liquid cooling pipeline structure of this utility model.

[0020] Attached reference numerals: 1-Top cover, 2-Battery clip bracket, 3-Heat pipe, 4-Liquid cooling circulation pump, 5-Explosion-proof valve, 6-Battery pack, 7-Insulation buffer cotton, 8-Liquid cooling pipe, 9-Phase change superheat plate, 10-Battery compartment load-bearing base, 11-Variable frequency energy-saving fan, 12-Reinforcing rib, 13-Circulating heat dissipation pipe, 14-Phase change material filling layer, 15-Temperature sensor, 16-Pipeline, 17-Box body. Detailed Implementation

[0021] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] Specific embodiments of the utility model:

[0023] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a battery compartment based on composite cooling technology, comprising: a safety box, a cooling mechanism, a battery pack, and a temperature control system. The safety box has a battery compartment support base 10 with a housing 17 above it and a liquid cooling pipe 8 embedded therein; a top cover 1 is provided above the housing 17; and battery clip brackets 2 are symmetrically arranged at the joint between the housing 17 and the top cover 1 to achieve rapid fixing and disassembly of the battery through a mechanical clip structure, while ensuring the stability and safety of the battery during equipment operation. Reinforcing ribs 12 are placed on the outside of the safety box, symmetrically arranged on the outer wall of the housing 1 and below the battery clip brackets 2, to enhance the rigidity of the housing and provide structural safety and stability for the battery compartment. Inside the safety box, heat-insulating buffer cotton 7 is embedded between the housing 1 and the battery pack 6 to isolate high or low temperature transmission, reduce the impact of heat on surrounding components, and absorb vibrations or external impacts during equipment operation.

[0024] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The cooling system includes a liquid cooling circulation system and an air cooling system. The liquid cooling circulation system consists of liquid cooling pipes 8, a phase change heat dissipation plate 9, a circulating heat dissipation pipe 13, and a liquid cooling circulation pump 4. The air cooling system includes a variable frequency energy-saving fan 11 and heat dissipation pipes 3. The variable frequency energy-saving fan 11 is located on the side wall of the housing 1, and the heat dissipation pipes 3 are symmetrically located on the outer side wall of the housing 1, above the variable frequency energy-saving fan 11, to remove heat through air cooling. The phase change material filling layer 14 is embedded in the battery pack 6 and located above the phase change heat dissipation plate 9. When heat reaches the phase change heat dissipation plate 9 through the phase change material filling layer 14, it undergoes initial cooling. The remaining uncooled heat is transferred to the phase change heat dissipation plate 9, which transfers some heat to the liquid cooling pipes 8 below, where the coolant carries away some of the heat, and transfers some heat to the housing 17 for heat dissipation by the variable frequency energy-saving fan 11. The liquid cooling pipes 8 are embedded above the battery compartment load-bearing base 10, and their inlets and outlets are connected to the circulating heat dissipation pipes 13. The circulating heat dissipation pipe 13 is connected at both ends to the liquid-cooled circulating pump 4 and the liquid-cooled pipe 8, respectively. The inlet and outlet of the liquid-cooled circulating pump 4 are connected to the circulating heat dissipation pipe 13, which drives the coolant to circulate in the closed pipeline of the battery system, effectively dispersing the remaining heat to the cooling mechanism and enabling the cooling mechanism to efficiently handle the heat one by one. At the same time, variable frequency energy-saving fans 11 are symmetrically embedded at both ends of the housing 17 and placed below the heat dissipation pipe 3. The variable frequency energy-saving fans 11 cool the entire device, ensuring the safe operation of the device and improving heat dissipation efficiency.

[0025] It should be noted that the internal structure of the liquid cooling pipe 8 and the circulating heat dissipation pipe 13 is hollow and stores coolant. The coolant circulates between the liquid cooling pipe 8, the circulating heat dissipation pipe 13 and the liquid cooling circulating pump 4, and works with the variable frequency energy-saving fan 11 to cool the heat. The pipeline 16 is electrically connected to the liquid cooling circulating pump 4, the temperature sensor 15, the variable frequency energy-saving fan 11 and the external controller. Based on the temperature measured by the temperature sensor 15, the temperature threshold can be set by the external controller to control each electronic component. Each component works with the external controller to intelligently control the flow rate of the liquid cooling circulating pump 4 or the switching on and off of the variable frequency energy-saving fan 11 to further dissipate heat from the battery compartment and achieve intelligent temperature control.

[0026] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4The battery assembly includes a battery pack 6 and an explosion-proof valve 5. The battery pack 6 is located above the phase change superheater plate 9 and inside the heat insulation buffer cotton 7. The heat generated during operation is cooled by the temperature sensor 15, the pipeline 16 located above the battery pack 6, and the externally connected liquid-cooled circulating pump 4 through the liquid-cooled pipe 8. The internal heat insulation buffer cotton 7 and the explosion-proof valve 5 located above the battery pack 6 can effectively maintain the safe and stable operation of the battery pack.

[0027] Among them, the explosion-proof valve 5 uses the HICV-S-350 rupture disc manufactured by Fike Company. With the use of this explosion-proof valve, when the internal battery reaches a certain pressure, the explosion-proof valve 5 will automatically break open to balance the pressure and increase safety performance.

[0028] In this embodiment, conventional battery compartments, such as those in patent application CN 222440680U, have excessively large internal space and multiple support columns. When the compartment vibrates, the battery is prone to collision and explosion, exacerbating safety hazards. In contrast, this application forms a protective layer for the battery by setting up heat-insulating buffer cotton 7 and explosion-proof valve 5, which can significantly reduce the explosion phenomenon caused by battery vibration and improve battery safety.

[0029] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The intelligent temperature control includes a temperature sensor 15 and a pipeline 16. The temperature sensor 15 is fixedly installed above the battery pack 6. When working, it feeds back the data to the pipeline 16 located above the battery pack 6. The pipeline 16 is connected to the temperature sensor 15 and drives the liquid cooling circulation pump 4 connected to the outside to start operating. The liquid cooling circulation pump 4 can cool the heat generated by the battery pack 6 when it is working through the liquid cooling pipeline 8 to ensure the stability and safety of the battery during equipment operation.

[0030] The simplified operation of this utility model is as follows: When the battery pack generates heat, the heat is transferred to the phase change overheating plate through the phase change material filling layer. The phase change overheating plate transfers part of the heat to the housing for heat dissipation through the variable frequency energy-saving fan. Most of the heat is cooled by the coolant in the liquid cooling pipe, and the coolant is circulated for heat dissipation through the pipeline controlled liquid cooling circulation pump under the monitoring of the temperature sensor.

[0031] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A battery compartment based on composite cooling technology, characterized in that, It includes a safety box, a battery pack inside the safety box, a liquid cooling circulation mechanism at the bottom of the battery pack inside the safety box, an air cooling heat dissipation mechanism on the side wall of the safety box, heat insulation buffer cotton embedded between the safety box and the battery pack, an explosion-proof valve at the top of the battery pack, and a temperature control component inside the safety box, wherein the air cooling heat dissipation mechanism is connected to the outside.

2. The battery compartment based on composite cooling technology according to claim 1, characterized in that, The liquid cooling circulation mechanism includes a phase change superheater plate, liquid cooling pipes, and circulating heat dissipation pipes. The phase change superheater plate is located at the bottom of the battery pack and is in direct contact with the battery pack. The liquid cooling pipes are laid in a loop at the bottom of the safety box, and the output end is connected to the circulating heat dissipation pipes. The circulating heat dissipation pipes pass through the safety box and are connected to an external liquid cooling circulation pump.

3. The battery compartment based on composite cooling technology according to claim 1, characterized in that, The air-cooled heat dissipation mechanism includes a variable frequency energy-saving fan and heat dissipation pipes. The variable frequency energy-saving fan is located on the side wall of the safety box, and the heat dissipation pipes are symmetrically located on opposite sides of the safety box and above the variable frequency energy-saving fan.

4. The battery compartment based on composite cooling technology according to claim 1, characterized in that, The battery pack has a phase change material filling layer between each pair of batteries.

5. The battery compartment based on composite cooling technology according to claim 1, characterized in that, The temperature control component includes a temperature sensor located at the top of the battery pack and connected to an external controller via a pipeline. The external controller is also electrically connected to a liquid cooling circulation mechanism and an air cooling heat dissipation mechanism.

6. The battery compartment based on composite cooling technology according to claim 1, characterized in that, The safety box includes a box body and a top cover. The bottom of the box body is provided with a battery compartment support base, and the outside of the box body is provided with reinforcing ribs. A battery buckle bracket is provided at the connection between the top cover and the box body.

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