Battery liquid immersion type liquid cooling device

Abstract

The utility model discloses a kind of battery liquid immersion type liquid cooling device, including battery pack and outer circulating cooling machine, battery contains battery box and internal battery pack, outer circulating cooling machine is communicated with battery box, and heat exchange heat dissipation is passed through cooling medium circulation and battery pack. Battery box and outer circulating cooling machine form closed loop by quick-mounting connector and pipeline. Outer circulating cooling machine includes circulating main body, water system and control system, circulating main body realizes medium circulation by compressor, condenser and the like component, water system auxiliary heat dissipation, control system monitors pressure and flow. Cooling medium uses Noah7160 fluorination liquid. The device is high in heat dissipation efficiency, temperature is uniform, can avoid thermal runaway, installation and maintenance are convenient, system stability is strong, applicable to the heat dissipation demand of high energy density battery.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, specifically to a battery liquid immersion liquid cooling device. Background Technology

[0002] Energy storage battery boxes can harvest electricity to achieve peak shaving and valley filling and improve power quality. Battery energy storage technology is currently the most promising and rapidly developing energy storage technology, occupying a mainstream position in the electrochemical energy storage market. With the large-scale application of electrochemical energy storage systems, their safety issues cannot be ignored.

[0003] Currently, battery energy storage systems generally use air cooling and liquid cooling plates for ambient temperature control. As battery energy density has increased in recent years, heat dissipation has become increasingly important. Problems such as high temperatures between battery packs or overcharging and over-discharging can easily lead to thermal runaway and fires, and in severe cases, even explosions of the entire energy storage system, causing incalculable losses. Higher cooling requirements are placed on energy storage battery boxes to ensure more uniform and stable temperatures among the batteries, better consistency, and more reliable charging and discharging processes. Therefore, this utility model develops a battery liquid immersion liquid cooling device to solve the above problems. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] Therefore, the purpose of this utility model is to provide a battery immersion liquid cooling device that immerses the battery module in a special medium, sets a certain flow rate for the medium, and continuously carries away the heat inside the battery to an external cooling unit for heat dissipation.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A battery immersion liquid cooling device, comprising: A battery pack, including a battery box and a battery pack installed in the battery box; An external circulation cooler is connected to the battery box and exchanges heat with the battery pack inside the battery box through the circulation of a cooling medium, dissipating the heat generated by the battery pack.

[0007] As a preferred embodiment of the battery liquid immersion liquid cooling device described in this utility model, the battery box has a first quick-connect connector and a second quick-connect connector. The external circulation cooler has a cooling medium outlet connector and a cooling medium inlet connector. The cooling medium outlet connector is connected to a first quick-connect connector via a connecting pipe, and the second quick-connect connector is connected to the cooling medium inlet connector via a connecting pipe.

[0008] As a preferred embodiment of the battery immersion liquid cooling device described in this utility model, the external circulation cooler includes a circulation body for circulating and transporting the cooling medium to exchange heat with the battery pack, a water system for exchanging heat with the cooling medium in the circulation body, and a control system for monitoring and regulating the pressure and flow of the circulation body.

[0009] As a preferred embodiment of the battery immersion liquid cooling device described in this utility model, the circulation body includes a compressor, a condenser, a dryer filter, an expansion valve, and an evaporator connected in sequence.

[0010] As a preferred embodiment of the battery immersion liquid cooling device described in this utility model, the water system includes a water tank and a water pump that drives the circulation of chilled water, wherein the chilled water circulates between the water tank and the evaporator to achieve heat exchange.

[0011] As a preferred embodiment of the battery immersion liquid cooling device described in this utility model, the control system includes a high-pressure controller, a low-pressure controller, and a float switch for monitoring pressure.

[0012] In a preferred embodiment of the battery immersion liquid cooling device described in this utility model, the cooling medium is Noah 7160 fluorinated liquid.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The method of immersing the battery pack in cooling medium is more efficient than the traditional indirect heat dissipation by air cooling or liquid cooling plates. It allows for direct and full contact with the battery surface, resulting in more efficient heat exchange. This keeps the temperature difference between individual cells in the battery pack within a small range (usually ≤3℃), effectively avoiding the risk of thermal runaway caused by local overheating.

[0014] 2. The battery box and the external circulation cooler are connected by a quick-connect fitting, eliminating the need for complex pipe welding, which greatly shortens the installation and maintenance time and reduces maintenance costs. The external circulation cooler integrates the circulation body, water system and control system. It improves heat dissipation capacity through multi-stage heat exchange (medium circulation + water system auxiliary heat dissipation). At the same time, the control system monitors pressure and flow in real time and can automatically adjust operating parameters to adapt to the heat dissipation needs of the battery under different operating conditions.

[0015] 3. Noah7160 fluorinated liquid is selected as the cooling medium. It is non-conductive, non-flammable, and has high chemical stability. Even in battery leakage or high temperature environments, it can avoid short circuits or fire hazards and improve the safety of the battery system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. 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 these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of a battery liquid immersion liquid cooling device according to the present invention; Figure 2 This is a schematic diagram of the structure of a battery pack for a battery liquid immersion type liquid cooling device according to the present invention; Figure 3 This is a structural connection diagram of the external circulation cooler of a battery liquid immersion type liquid cooling device according to this utility model. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Figures 1-3 The diagram shown is a structural schematic of a battery liquid immersion liquid cooling device according to this utility model. Please refer to [link / reference]. Figures 1-3 The battery immersion liquid cooling device of this embodiment includes a battery pack 100 and an external circulation cooler 200.

[0019] The battery pack 100 has a battery box 110 inside which the battery pack 120 is installed, and the battery box 110 is filled with the cooling medium Noah 7160 fluorinated liquid to ensure that the battery pack 120 is completely submerged in the medium.

[0020] The battery box 110 is connected to the cooling medium outlet connector 200a and the cooling medium inlet connector 200b of the external circulation cooler 200 via the first quick-connect connector 110a and the second quick-connect connector 110b, respectively, through connecting pipes, forming a closed loop. The heat generated by the battery pack 120 during operation is absorbed by the surrounding Noah7160 fluorinated liquid, and the heated cooling medium flows into the cooling medium inlet connector 200b of the external circulation cooler 200 through the second quick-connect connector 110b and pipes.

[0021] The external circulation cooler 200 includes a circulation body 210 that circulates and transports cooling medium for heat exchange with the battery pack 120, a water system 220 that exchanges heat with the cooling medium in the circulation body 210, and a control system 230 that monitors and regulates the pressure and flow of the circulation body 210.

[0022] The circulating body 210 includes a compressor 210a, a condenser 210b, a dryer filter 210c, an expansion valve 210d, an evaporator 210e, and a fan 210f that air-cools the condenser 210b, which are connected in sequence. The water system 220 includes a water tank 220a and a water pump 220b that drives the chilled water circulation. The chilled water circulates between the water tank 220a and the evaporator 210e to achieve heat exchange. The control system 230 includes a high-pressure controller 230a, a low-pressure controller 230b, and a float switch 230c for monitoring pressure.

[0023] In the main circulation unit 210, the compressor 210a sends the high-temperature and high-pressure cooling medium vapor into the condenser 210b, and the fan 210f cools the condenser 210b by air, so that the medium condenses into a liquid state. After the liquid medium passes through the dryer filter 210c to remove impurities and moisture, it passes through the expansion valve 210d to reduce the pressure and enters the evaporator 210e to exchange heat with the water system 220.

[0024] In the water system 220, the water pump 220b drives the chilled water to circulate between the water tank 220a and the evaporator 210e, absorbing the heat of the cooling medium in the evaporator 210e to achieve secondary heat dissipation. The cooled cooling medium flows back to the battery box 110 through the cooling medium outlet connector 200a and the first quick-connect connector 110a to complete the circulation.

[0025] The control system 230 monitors the pressure inside the circulating body 210 in real time through the high-pressure controller 230a and the low-pressure controller 230b, and monitors the flow rate through the float switch 230c. When the pressure or flow rate is abnormal, the power of the compressor 210a or the valve opening is automatically adjusted to ensure stable operation of the system.

[0026] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery immersion liquid cooling device, characterized in that, include: The battery pack (100) includes a battery box (110) and a battery pack (120) installed in the battery box (110). An external circulation cooler (200) is connected to the battery box (110) and exchanges heat with the battery pack (120) in the battery box (110) through the circulation of the cooling medium, thereby dissipating the heat generated by the battery pack (120).

2. The battery immersion liquid cooling device according to claim 1, characterized in that, The battery box (110) has a first quick-connect connector (110a) and a second quick-connect connector (110b). The external circulation cooler (200) has a cooling medium outlet connector (200a) and a cooling medium inlet connector (200b). The cooling medium outlet connector (200a) is connected to the first quick-connect connector (110a) through a connecting pipe, and the second quick-connect connector (110b) is connected to the cooling medium inlet connector (200b) through a connecting pipe.

3. The battery immersion liquid cooling device according to claim 1, characterized in that, The external circulation cooler (200) includes a circulation body (210) for circulating and transporting cooling medium to exchange heat with the battery pack (120), a water system (220) for exchanging heat with the cooling medium in the circulation body (210), and a control system (230) for monitoring and regulating the pressure and flow of the circulation body (210).

4. The battery immersion liquid cooling device according to claim 3, characterized in that, The circulating unit (210) includes a compressor (210a), a condenser (210b), a dryer filter (210c), an expansion valve (210d), an evaporator (210e), and a fan (210f) that air-cools the condenser (210b) in sequence.

5. A battery immersion liquid cooling device according to claim 4, characterized in that, The water system (220) includes a water tank (220a) and a water pump (220b) that drives the circulation of chilled water, wherein the chilled water circulates between the water tank (220a) and the evaporator (210e) to achieve heat exchange.

6. The battery immersion liquid cooling device according to claim 3, characterized in that, The control system (230) includes a high-pressure controller (230a), a low-pressure controller (230b), and a float switch (230c) for monitoring pressure.

7. The battery immersion liquid cooling device according to claim 1, characterized in that, The cooling medium is Noah 7160 fluorinated liquid.

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