Battery cooling structure

Abstract

The utility model discloses a battery cooling structure, relates to battery cooling technical field, said battery cooling structure includes box body and cooling structure, said box body is equipped with a plurality of mounting hole and a plurality of cooling hole along the first direction, said mounting hole is equipped with the battery, said box body is made of phase change material, said cooling hole is equipped with the battery. The cooling structure comprises a plurality of pipelines and two liquid storage tanks, the multiple pipelines penetrate through the cooling holes, the two ends of the multiple pipelines communicate with the two liquid storage tanks correspondingly, and the liquid storage tanks are filled with cooling media so that the cooling media can be conveyed into the pipelines. The phase change material absorbs heat and delays temperature rise when the battery emits heat, the cooling medium filled in the liquid storage tank has high specific heat capacity and low boiling point and can effectively absorb and transfer heat, and when the battery works, the phase change material and the cooling medium act together, so that the temperature of the battery is kept stable through phase change and circulating refrigeration, and the service life of the battery is prolonged.

Description

Technical Field

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

[0002] As the core component of electric vehicles, the performance of power batteries directly affects the development of the electric vehicle industry. Power batteries generate a lot of heat during charging and discharging. If this heat is not dissipated in time, the battery will be in a high-temperature environment for a long time, affecting the battery's performance and lifespan. Currently, the main cooling methods for batteries are liquid cooling, direct cooling, and phase change cooling.

[0003] Phase change cooling uses phase change materials as a cooling medium to cool the battery. Its advantages are that phase change materials have a large latent heat of phase change and a temperature uniformity effect on the battery. However, if only phase change materials are used, a large amount of phase change materials are needed to make the cooling structure, which will affect the energy density of the battery. Utility Model Content

[0004] The main purpose of this invention is to propose a battery cooling structure that aims to increase the rate at which phase change materials release heat, thereby reducing the amount of phase change materials used.

[0005] To achieve the above objectives, the battery cooling structure proposed in this utility model includes:

[0006] The housing has multiple mounting holes and multiple cooling holes formed along a first direction. A battery is installed in the mounting holes. The housing is made of a phase change material.

[0007] The cooling structure includes multiple pipes and two liquid storage tanks. The multiple pipes pass through the cooling holes, and both ends of the multiple pipes are respectively connected to the two liquid storage tanks. The liquid storage tanks are filled with cooling medium for conveying cooling medium into the pipes.

[0008] Preferably, a water pump is installed on one of the housings, and the two ends of the water pump are respectively connected to two liquid storage tanks.

[0009] Preferably, the housing is located between two opposite sides of the two liquid storage tanks.

[0010] Preferably, each battery has multiple pipes arranged laterally.

[0011] Preferably, the battery is equipped with a sensor for detecting the temperature of the battery.

[0012] Preferably, the liquid storage tank is provided with an infusion port, and the infusion port is internally threaded with a sealing cap.

[0013] Preferably, multiple pipes are detachably connected between the opposite sides of the two liquid storage tanks, and each of the opposite sides of the two liquid storage tanks is provided with a connecting component for connecting the liquid storage tanks and the pipes.

[0014] Preferably, the connection component includes:

[0015] Multiple connectors are provided, each of which is disposed between two opposite sides of the liquid storage tanks. Each connector has an installation hole on one side in a first direction for inserting the end of the pipe, and the installation hole communicates with the liquid storage tank.

[0016] Multiple screw connectors, which pass through the connector and are threadedly connected to the pipe.

[0017] Preferably, a sealing element is provided between the end of the pipe and the liquid storage tank to seal the gap between the end of the pipe and the liquid storage tank.

[0018] Preferably, each of the two liquid storage tanks is provided with an abutment on an opposite side for abutting the tank body, thereby restricting the installation position of the tank body.

[0019] In the technical solution provided by this utility model, the material of the housing is a phase change material, and the cooling structure includes multiple pipes and two liquid storage tanks. The multiple pipes pass through the cooling holes, and the two ends of the multiple pipes are respectively connected to the two liquid storage tanks. The liquid storage tanks are filled with a cooling medium to transport the cooling medium into the pipes. When the battery heats up, the phase change material absorbs heat and slows down the temperature rise. The cooling medium filled in the liquid storage tank has a high specific heat capacity and a low boiling point, which can effectively absorb and transfer heat. When the battery is working, the phase change material and the cooling medium work together to maintain the battery temperature stability through phase change and cyclic cooling. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A perspective view of an embodiment of the battery cooling structure provided by this utility model;

[0022] Figure 2 for Figure 1 Schematic diagram of the cooling structure and connecting components;

[0023] Figure 3 for Figure 1 A top view of the middle box.

[0024] Explanation of icon numbers:

[0025] 1. Housing; 2. Cooling structure; 21. Liquid storage tank; 22. Pipeline; 3. Water pump; 4. Connecting components; 41. Screw connector; 42. Connecting seat; 5. Abutment component; 6. Battery; 7. Sensor.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This utility model provides a battery cooling structure. Figures 1 to 3 This is an embodiment of the battery cooling structure provided by this utility model.

[0031] Please refer to the following: Figures 1 to 2The battery 6 cooling structure includes a housing 1 and a cooling structure 2. The housing 1 has multiple mounting holes and multiple cooling holes along a first direction. The battery 6 is installed in the mounting holes. The housing 1 is made of phase change material. The cooling structure 2 includes multiple pipes 22 and two liquid storage tanks 21. The multiple pipes 22 pass through the cooling holes, and both ends of the multiple pipes 22 are respectively connected to the two liquid storage tanks 21. The liquid storage tanks 21 are filled with cooling medium to deliver cooling medium into the pipes 22.

[0032] The housing 1 is made of phase change material, which is a material with unique thermodynamic properties. Under specific temperature conditions, phase change material will undergo phase transition, such as from solid to liquid, or between liquid and gas. In the scenario of cooling battery 6, when the battery 6 generates heat and causes the local temperature of housing 1 to rise to the phase transition point of the phase change material, the phase change material can absorb a large amount of heat, thereby slowing down the rapid rise of the temperature inside housing 1, playing a key role in initial buffering and temperature regulation, and buying time for the efficient operation of the subsequent cooling structure 2 and creating more favorable temperature difference conditions.

[0033] Two liquid storage tanks 21 are located at opposite ends of the entire cooling system. They bear the important responsibility of storing and transporting the cooling medium. The cooling medium filled inside the liquid storage tanks 21 is generally a liquid with high specific heat capacity, low boiling point and stable chemical properties, such as some common special coolants. High specific heat capacity means that a unit mass of cooling medium can absorb a large amount of heat while its own temperature rises relatively little, which is beneficial for absorbing the heat conducted from the pipes 22. The low boiling point characteristic makes it easy for the cooling medium to undergo a phase change after absorbing a certain amount of heat, changing from a liquid state to a gaseous state. The gaseous cooling medium can then efficiently release heat in subsequent cycles, returning to a liquid state, thus achieving a circulating cooling effect.

[0034] When battery 6 is installed in the mounting hole of housing 1 and begins to work, battery 6 will inevitably generate heat due to electrochemical processes such as charging and discharging. The heat is quickly conducted to the surrounding housing 1. Initially, the phase change material of housing 1 plays a role, absorbing some of the heat through its own phase change, which slows down the rate of temperature rise to a certain extent. As battery 6 continues to heat up, the temperature of housing 1 gradually increases. When the activation threshold of cooling structure 2 is reached, the cooling medium in the storage tank 21 begins to flow into pipe 22 under the drive of pressure difference or power device such as pump. When the cooling medium flows through pipe 22 that passes through the cooling hole, due to the significant temperature difference between pipe 22 and the inside of housing 1, heat will be quickly conducted from housing 1 through the wall of pipe 22 to the cooling medium in pipe 22. After absorbing heat, the cooling medium's own temperature rises. If it reaches the boiling point, it will undergo a phase change, changing from liquid to gas. The gaseous cooling medium carries a large amount of heat and continues to flow in pipe 22 until it returns to storage tank 21.

[0035] Inside the liquid storage tank 21, the gaseous cooling medium dissipates heat to the surrounding environment through heat dissipation structures such as heat dissipation fins, and then condenses back into liquid, completing a heat exchange cycle. Subsequently, the liquid cooling medium is transported to the pipe 22 again, repeating the above process of heat absorption, phase change, heat dissipation, and condensation, continuously carrying away the heat emitted by the housing 1 and the battery 6, thereby maintaining the battery 6 within a suitable operating temperature range, ensuring the stable performance and lifespan of the battery 6, and avoiding safety hazards such as battery bulging, combustion, or even explosion caused by overheating. The whole process is a dynamic and continuous thermal balance regulation mechanism that flexibly adjusts the cooling intensity according to the heat generation of the battery 6 at all times.

[0036] Therefore, in the technical solution provided by this utility model, the material of the box 1 is a phase change material, and the cooling structure 2 includes multiple pipes 22 and two liquid storage tanks 21. The multiple pipes 22 pass through the cooling holes, and the two ends of the multiple pipes 22 are respectively connected to the two liquid storage tanks 21. The liquid storage tanks 21 are filled with a cooling medium to transport the cooling medium into the pipes 22. When the battery 6 heats up, the phase change material absorbs heat and slows down the temperature rise. The cooling medium filled in the liquid storage tanks 21 has a high specific heat capacity and a low boiling point, which can effectively absorb and transfer heat. When the battery 6 is working, the phase change material and the cooling medium work together to maintain the temperature stability of the battery 6 through phase change and cyclic cooling.

[0037] In order to enable the cooling medium to circulate between the two storage tanks 21, it is necessary to allow the cooling medium in the two storage tanks 21 to flow between each other. Specifically, in the embodiment of this utility model, a water pump 3 is installed on one of the tanks 1. The two ends of the water pump 3 are respectively connected to the two storage tanks 21. The water pump 3 draws out the cooling medium in one storage tank 21 and transports it to the other storage tank 21. Then, it flows back to the storage tank 21 from which the cooling medium was drawn out through the pipe 22, thereby realizing the circulation of the cooling medium and improving the cooling efficiency.

[0038] To ensure more efficient and stable circulation of the cooling medium, this invention also includes a corresponding control circuit. The control circuit can automatically adjust the working state of the water pump 3 according to the real-time temperature of the battery 6, including starting, stopping, and adjusting the flow rate. When the temperature of the battery 6 rises to a preset threshold, the control circuit will start the water pump 3 to begin circulating the cooling medium. When the temperature of the battery 6 drops to a safe range, the control circuit will stop the water pump 3 to reduce unnecessary energy consumption. In addition, the control circuit can also add a fault detection function. Once an abnormality in the cooling system is detected, such as low flow rate or water pump 3 failure, an alarm will be issued in time and corresponding measures will be taken to ensure the safe operation of the battery 6.

[0039] In practical applications, the battery cooling structure of this utility model can effectively extend the service life of the battery and improve the charging and discharging efficiency of the battery. For example, in electric vehicles, through effective temperature management, the performance degradation of the battery caused by overheating can be reduced, thereby improving the range of the entire vehicle. At the same time, the compact design of this structure is also easy to install in a limited space and adapts to the battery layout requirements of different vehicle models.

[0040] Furthermore, the housing 1 is located between the two liquid storage tanks 21 on opposite sides.

[0041] Furthermore, each of the batteries 6 has multiple pipes 22 arranged laterally.

[0042] During the electrochemical processes of charging and discharging, battery 6 inevitably generates heat, which is rapidly conducted to the surrounding housing 1, causing the temperature of housing 1 to rise. Initially, the phase change material inside housing 1 plays a role, absorbing some of the heat using its own phase change characteristics, thereby mitigating the rate of temperature rise to some extent. However, as battery 6 continues to generate heat, the temperature of housing 1 gradually increases. In this case, cooling structure 2 is needed to effectively regulate the temperature of housing 1. Specifically, multiple pipes 22 are installed in the phase change material around battery 6, and the cooling medium flowing through these pipes 22 reduces the temperature of housing 1, thereby ensuring the normal operation and safety of battery 6.

[0043] Please see Figure 3 The temperature of battery 6 changes continuously during use, and the required operating state is different at different temperatures. Specifically, in the embodiment of this utility model, battery 6 is provided with sensor 7, which is used to detect the temperature of battery 6.

[0044] When battery 6 begins discharging or charging, temperature sensor 7 immediately and simultaneously activates, continuously collecting battery 6 temperature data at a high frequency. It performs a precise measurement periodically, and the initial temperature value is directly transmitted to the control system's built-in comparison module for comparison with preset low-temperature and high-temperature thresholds. As long as the real-time temperature remains consistently below the low-temperature threshold, the electronic water pump 3 remains stationary, and there is no coolant flow in the cooling pipe 22. The entire cooling system operates almost silently, minimizing energy consumption. As battery 6 continues to operate, when a temperature reading is detected... When the measured data reaches or exceeds the low temperature threshold and gradually approaches the high temperature threshold, the control system responds quickly, activating the electronic water pump 3 circuit. The electronic water pump 3 motor rotates at high speed, generating suction to draw the coolant in the storage tank 21 into the pipe 22. The coolant flows along the pipe 22 to the heat dissipation parts around the battery 6, absorbs the weak heat emitted by the battery 6, and then flows back to the storage tank 21 to complete the initial cycle. This process continues to repeat. The power of the water pump 3 is dynamically adjusted according to the temperature until the temperature of the battery 6 drops back to the safe low temperature range. Then, the electronic water pump 3 slows down its speed according to the instruction until it stops.

[0045] The cooling medium in the liquid storage tank 21 needs to be replaced or replenished after a period of use. Specifically, in the embodiment of this utility model, the liquid storage tank 21 is provided with a liquid inlet, and a sealing cap is threaded into the liquid inlet.

[0046] Battery 6 may be damaged during use, so it is necessary to make battery 6 removable and replaceable at any time. Specifically, in the embodiment of this utility model, the connecting component 4 includes multiple connecting seats 42 and multiple screw connectors 41. The multiple connecting seats 42 are respectively disposed between two opposite sides of the two liquid storage tanks 21. The multiple connecting seats 42 have mounting holes on one side in the first direction for inserting the end of the pipe 22, and the mounting holes are connected to the liquid storage tank 21. The multiple screw connectors 41 pass through the connecting seats 42 and are threadedly connected to the pipe 22.

[0047] When installing pipe 22, first pick up one pipe 22 and carefully insert one end into the mounting hole of the connector 42 until the end of pipe 22 reaches the appropriate depth, so that pipe 22 fits tightly with the mounting hole, ensuring that coolant can flow smoothly from the reservoir 21 into pipe 22. Next, pick up the corresponding screw connector 41 and insert it through the pre-drilled screw hole of the connector 42. The threaded part of the screw connector 41 is precisely screwed into the pre-machined threaded groove on the outer edge of the pipe 22 end. Use a wrench or other tools to gradually tighten the screw connector 41. Through the tightening action of the threads, on the one hand, the position of pipe 22 is further fixed to prevent it from loosening due to coolant flow impact, equipment vibration, etc. during equipment operation; on the other hand, it ensures the sealing of the connection and prevents the coolant from leaking from the interface, ensuring the airtight integrity of the entire cooling circulation system. Following these steps, complete the installation and connection of all pipes 22 and connectors 42 one by one, building a stable coolant delivery network.

[0048] In the battery 6 cooling system, the cooling medium in the reservoir 21 is crucial for maintaining the normal operating temperature of the battery 6. If there is a gap between the end of the pipe 22 and the reservoir 21 without a sealing measure, the cooling medium will leak out from these gaps during circulation. For example, the cooling medium may be a certain type of coolant. Once leaked, the amount of coolant will continuously decrease, leading to a decrease in the cooling capacity of the cooling system. When the coolant decreases to a certain extent, it may not be able to effectively absorb the heat generated by the battery 6, causing the battery 6 temperature to be too high, thereby affecting the performance and lifespan of the battery 6, and may even cause safety problems such as overheating damage to the battery 6. Specifically, in the embodiment of this utility model, a sealing element is provided between the end of the pipe 22 and the reservoir 21 to seal the gap between the end of the pipe 22 and the reservoir 21.

[0049] During operation, the cooling medium in the pipe 22 circulates under a certain pressure. The seals ensure that the connection between the end of the pipe 22 and the liquid storage tank 21 remains well sealed, preventing leakage of the cooling medium and helping to maintain stable internal pressure. If the system pressure is unstable, such as too low, the circulation speed of the cooling medium may slow down, affecting the heat exchange efficiency. If the pressure is too high, it may damage components such as the pipe 22 and the liquid storage tank 21. The presence of the seals can effectively prevent this from happening.

[0050] The housing 1 contains a battery 6, so the housing 1 needs to be stably positioned between the two liquid storage tanks 21. Specifically, each of the two liquid storage tanks 21 has a contacting member 5 on its opposite side to abut against the housing 1, which restricts the installation position of the housing 1.

[0051] Rubber pads or metal protrusions are installed on the side of the two liquid storage tanks 21 facing the body 1. When the body 1 is installed between the two liquid storage tanks 21, these abutting parts 5 tightly abut against the body 1 to prevent the body 1 from shaking or shifting during vehicle operation, ensuring the stable installation of the battery 6, thereby ensuring the safe operation of the entire system.

[0052] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A battery cooling structure, characterized by comprising: The application relates to a battery cooling device. The battery cooling device comprises a box body and a cooling structure. The box body is provided with a plurality of mounting holes and a plurality of cooling holes in a first direction.

2. The battery cooling structure according to claim 1, wherein The battery is mounted in the mounting hole.

3. The battery cooling structure according to claim 1, wherein The material of the box body is a phase change material.

4. The battery cooling structure according to claim 1, wherein The cooling structure comprises a plurality of pipes and two liquid storage tanks.

5. The battery cooling structure according to claim 1, wherein The pipes penetrate the cooling holes.

6. The battery cooling structure according to claim 1, wherein The two ends of the pipes are respectively communicated with the two liquid storage tanks.

7. The battery cooling structure according to claim 1, wherein The liquid storage tanks are filled with cooling medium.

8. The battery cooling structure according to claim 7, wherein The cooling medium is used for conveying the cooling medium into the pipes. One of the box bodies is provided with a water pump. The two ends of the water pump are respectively communicated with the two liquid storage tanks.

9. The battery cooling structure of claim 1, wherein, The box body is located between the opposite sides of the two liquid storage tanks.

10. The battery cooling structure of claim 1, wherein, The side of each battery is arranged with a plurality of pipes. The battery is provided with a sensor. The sensor is used for detecting the temperature of the battery. The liquid storage tank is provided with a liquid outlet. The sealing cover is screw-connected in the liquid outlet. The opposite sides of the two liquid storage tanks are detachably connected with the pipes. The opposite sides of the two liquid storage tanks are provided with connecting assemblies. The connecting assemblies are used for connecting the liquid storage tanks and the pipes. The connecting assembly comprises a plurality of connecting seats and a plurality of screwing pieces. The connecting seats are arranged between the opposite sides of the two liquid storage tanks. The mounting holes are provided on one side of the connecting seats in the first direction. The mounting holes are used for inserting the pipe end. The mounting holes are communicated with the liquid storage tanks. The screwing pieces penetrate the connecting seats and are screw-connected with the pipes. The pipe end and the liquid storage tank are provided with a sealing piece. The sealing piece is used for sealing the gap between the pipe end and the liquid storage tank. The opposite sides of the two liquid storage tanks are provided with abutting pieces. The abutting pieces are used for abutting the box body and limiting the mounting position of the box body.

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