Water-cooled lithium battery liquid cooling machine

Abstract

The utility model discloses a water-cooled lithium battery liquid cooling machine, which is characterized in that a compressor is respectively connected with a plate heat exchanger and a condenser, the condenser is connected with an external sea water pump, the plate heat exchanger is connected with an internal circulating water pump, a water inlet temperature probe is arranged at a water inlet of the plate heat exchanger, and an electronic expansion valve is arranged between the electronic expansion valve and the condenser. According to the utility model, chilled water with the temperature of 25 DEG C can be continuously provided for a unit for cooling battery equipment, cold water enters the metal heat exchange plate and is in contact with a battery pack needing to be cooled outside, and then heat conduction is carried out, so that the battery is cooled. The liquid cooling machine for cooling equipment does not need to provide very cold water, the temperature of a general battery chip is not suitable to be higher than 80 DEG C, only water at 25 DEG C needs to be provided for cooling the equipment, in addition, the water at 25 DEG C is provided for cooling so as to prevent the temperature from being too low, condensate water is generated outside a heat exchange plate, and a guarantee is provided for the safety of the battery.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering technology, specifically to a water-cooled lithium battery liquid cooler. Background Technology

[0002] Many new energy ships now use lithium battery packs as the power source for the entire ship. Batteries release heat during charging and discharging. A large number of batteries accumulate in the battery compartment, causing a significant increase in heat. If they are not cooled, the lifespan and safety of the batteries will be affected.

[0003] Conventional battery compartment cooling methods typically employ fan cooling, which involves using a large fan to blow air onto the battery pack for heat exchange. This method has the following drawbacks:

[0004] 1. Fans can only exchange heat locally. Traditionally, there are dead zones where the airflow doesn't reach, resulting in poor cooling.

[0005] 2. Ships generally operate on the sea surface, and the sea breeze blowing in can be corrosive. Many batteries are connected by copper tubes, and long-term corrosion can have a significant impact on the battery's lifespan.

[0006] Another common cooling method is air conditioning, which also faces the problem of uneven cooling—rooms closer to the air conditioner are cooler, while those farther away are warmer. Air conditioning needs to lower the temperature of the entire room, which consumes a lot of energy. Furthermore, during operation, localized overcooling can lead to condensation, which can significantly impact battery safety.

[0007] Both ventilation cooling and air conditioning cooling are forms of convection cooling, which is air cooling. To solve the above problems, this utility model designs a water-cooled lithium battery liquid cooler. Utility Model Content

[0008] To address the shortcomings of existing technologies, the purpose of this invention is to provide a water-cooled lithium battery liquid cooler. This cooler continuously supplies 25°C chilled water to the battery cooling unit. The chilled water enters the metal heat exchange plates and contacts the battery pack to be cooled, then conducts heat to cool the battery. The liquid cooler does not need to provide very cold water; generally, the battery chip temperature should not exceed 80°C, and 25°C water is sufficient for cooling. Furthermore, providing 25°C water prevents condensation from forming on the heat exchange plates due to excessively low temperatures, thus ensuring battery safety.

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: a water-cooled lithium battery liquid cooler, comprising a compressor, a plate heat exchanger, a built-in circulating water pump, an electronic expansion valve, and a condenser. The compressor is connected to both the plate heat exchanger and the condenser. The condenser is connected to an external seawater pump. The plate heat exchanger is connected to the built-in circulating water pump. An inlet water temperature probe is installed at the inlet of the plate heat exchanger. The electronic expansion valve is located between the electronic expansion valve and the condenser.

[0010] Preferably, the compressor is a DC brushless inverter compressor, and a temperature switch is installed at the compressor's exhaust port. The compressor is also connected to a control mainboard in the control box, and the control mainboard is connected to an inlet water temperature probe.

[0011] The beneficial effects of this utility model are:

[0012] 1. Uniform cooling, eliminating the problem of condensation caused by localized cooling;

[0013] 2. High energy efficiency; only suitable for equipment requiring cooling.

[0014] By employing a dual-cycle design of "refrigerant-seawater" combined with intelligent temperature control technology, energy efficiency is significantly improved while ensuring battery safety. Its innovation lies in balancing cooling efficiency and safety, providing a low-cost, highly reliable solution for lithium-ion battery thermal management. Attached Figure Description

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram illustrating the principle of this utility model. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Reference Figure 1-2 The specific implementation adopts the following technical solution: a water-cooled lithium battery liquid cooler, including a compressor 1, a plate heat exchanger 2, a built-in circulating water pump 3, an electronic expansion valve 4, and a condenser 5. The compressor 1 is connected to the plate heat exchanger 2 and the condenser 5 respectively. The condenser 5 is connected to an external seawater pump 6. The plate heat exchanger 2 is connected to the built-in circulating water pump 3. An inlet water temperature probe is provided at the inlet of the plate heat exchanger 2. The electronic expansion valve 4 is located between the electronic expansion valve 4 and the condenser 5.

[0020] It is worth noting that the compressor 1 is a DC brushless inverter compressor, and a temperature switch is installed at the exhaust port of the compressor 1. The compressor 1 is also connected to the control mainboard in the control box 7, and the control mainboard is connected to the inlet water temperature probe.

[0021] In addition, the condenser 5 adopts a sleeve structure.

[0022] The working principle of this specific implementation is as follows: The water temperature entering the plate heat exchanger is maintained at approximately 30°C, and the water temperature exiting the plate heat exchanger is maintained at 25°C. The inlet water temperature probe is set to 30°C. If the incoming water temperature is higher than 30°C, the compressor starts; if the incoming water temperature is equal to 30°C, the compressor stops. The circulating water pump is continuously running to provide a constant flow of water. For compressor overheat protection, a temperature switch is placed at the exhaust port. When the set value is exceeded, it automatically disconnects. If the circuit board receives a disconnected circuit, it will activate an alarm program and stop the compressor. The evaporator temperature probe is located on the evaporator. If the refrigerant pressure is very low, a low-temperature alarm is triggered, and the compressor shuts down. The condenser temperature probe is located on the condenser. If the refrigerant pressure is too high, a high-temperature alarm is triggered, and the compressor shuts down. This provides dual protection. The control board in the control box controls the compressor based on the collected inlet water temperature, adjusting its load, unloading, or stopping operation. If the temperature is significantly higher than 30°C, the compressor will run rapidly; if it approaches 30°C, it will unload; and if it reaches 30°C, it will stop.

[0023] This specific implementation uses 25°C cooling water to prevent a sudden drop in the battery pack surface temperature, eliminating the risk of condensation and ensuring battery insulation and safety. The variable frequency compressor 1 and electronic expansion valve 4 work together to adjust the cooling capacity as needed, reducing energy waste. The condenser 5 uses seawater as the cooling medium (suitable for coastal or marine environments), reducing cooling energy consumption and meeting green energy requirements. The DC brushless variable frequency compressor is more than 30% more energy-efficient than traditional compressors and operates with low noise. The plate heat exchanger 2 adopts a high-efficiency heat transfer design, reducing cooling water circulation resistance and improving heat exchange efficiency. The control system integrates a temperature switch and an intelligent mainboard, providing real-time fault warnings and extending equipment lifespan. It is suitable for temperature-sensitive applications such as new energy vehicle battery packs and energy storage power stations, and is particularly suitable for high-temperature or high-humidity environments.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water-cooled lithium battery liquid cooler, characterized in that, It includes a compressor (1), a plate heat exchanger (2), a built-in circulating water pump (3), an electronic expansion valve (4), and a condenser (5). The compressor (1) is connected to the plate heat exchanger (2) and the condenser (5) respectively. The condenser (5) is connected to an external seawater pump (6). The plate heat exchanger (2) is connected to the built-in circulating water pump (3). An inlet water temperature probe is installed at the inlet of the plate heat exchanger (2). The electronic expansion valve (4) is located between the electronic expansion valve (4) and the condenser (5).

2. The water-cooled lithium battery liquid cooler according to claim 1, characterized in that, The compressor (1) mentioned above is a DC brushless inverter compressor.

3. The water-cooled lithium battery liquid cooler according to claim 1, characterized in that, The compressor (1) is equipped with a temperature switch at its exhaust port; the compressor (1) is also connected to the control main board in the control box (7), and the control main board is connected to the inlet water temperature probe.

4. The water-cooled lithium battery liquid cooler according to claim 1, characterized in that, The condenser (5) adopts a sleeve structure.

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