Liquid cooling temperature regulation device

Abstract

The utility model relates to a kind of liquid cooling temperature regulation device, including the cooling liquid circulation component of being arranged in the shell, refrigeration cycle component and plate heat exchanger, cooling liquid circulation component and refrigeration cycle component are connected by plate heat exchanger heat exchange;Refrigeration cycle component includes condenser, compressor and condensing fan, the inlet of condenser is communicated with the outlet end of compressor, the inlet end of compressor is communicated with the outlet end of plate heat exchanger, the outlet end of condenser is communicated with the inlet end of plate heat exchanger, another inlet end of plate heat exchanger is communicated with cooling liquid circulation component;The pipeline in shell is set with the way of laminated between each component.All components of the liquid cooling temperature regulation device are designed with laminated type, condensing fan and condenser, electric control module and water inlet pipe component and water outlet pipe component are set with laminated way, significantly reduce the volume of equipment, solve the problem of traditional unit bulky, suitable for new energy vehicles, energy storage cabinet and other limited space scene.

Description

Technical Field

[0001] This utility model relates to the field of power battery heat pipe technology, specifically to a liquid cooling temperature control device. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage systems, battery thermal management technology has become a key technology for ensuring battery safety and extending battery life. Liquid cooling temperature control systems, as an important method of battery thermal management, are widely used in the field of battery temperature management due to their efficient heat exchange capabilities and precise temperature control advantages.

[0003] Currently, common liquid cooling temperature control devices on the market mainly consist of two parts: a refrigeration cycle system and a coolant circulation system. The refrigeration cycle system typically comprises a compressor, condenser, expansion valve, and evaporator, while the coolant circulation system consists of a water pump, heat exchanger, and piping. CN221429387U discloses a single-tank cold storage type precision temperature control liquid cooling system, which includes a compression refrigeration subsystem, a cold storage liquid replenishment subsystem, and a liquid supply heat exchange subsystem. The compression refrigeration subsystem forms a loop consisting of a compressor, condenser, liquid receiver, throttling element, plate heat exchanger, and gas-liquid separator. CN104315739B discloses a chiller with dual condensation and dual heat dissipation. This chiller adds a special circulation branch to a conventional chiller, forming a dual condensation and dual heat dissipation structure to achieve condensation heat release and forced air cooling functions.

[0004] Regarding the structural layout of liquid cooling temperature control systems, CN117320406A describes a single-tank cold storage type precision temperature control liquid cooling system. This system, through reasonable system design, structural layout, and coordinated matching of different cooling methods, can achieve multiple operating modes, improving temperature control reliability. CN204176953U proposes a special cycle scheme involving three cycles working together: a compressor refrigeration cycle, a coolant refrigeration cycle, and a coolant heat dissipation cycle. This allows for dual control and regulation of the liquid supply temperature through compressor refrigeration and forced air cooling.

[0005] However, existing liquid cooling temperature control devices still have some technical problems: First, traditional battery liquid cooling units are bulky, often exceeding 1m³ in size, making them difficult to integrate into compact vehicles or energy storage cabinets, thus limiting their application in small devices; second, existing liquid cooling systems mostly adopt a single-cycle design, which cannot manage multiple battery packs simultaneously, resulting in low system redundancy and difficulty in meeting the thermal management requirements of large-scale battery systems; third, in vertical energy storage cabinets, the height potential energy difference of battery packs can lead to an imbalance in circulating water pressure, affecting system stability and heat exchange efficiency. Although CN104602485B proposes a wide-temperature-range high-efficiency liquid cooling circulation temperature control device, including components such as a main control system, compressor, condenser, expansion valve, and plate heat exchanger, it still has shortcomings in temperature control accuracy and responsiveness, making it difficult to achieve more accurate staged cooling and heating, and failing to meet the high-precision temperature requirements of battery systems. In addition, the structural layout of existing liquid cooling systems is often not compact enough, and thermal interference between components also affects the overall performance of the system.

[0006] Therefore, there is an urgent need for a compact liquid-cooled temperature control device that can manage multiple battery packs simultaneously and has high-precision temperature control capabilities to meet the battery thermal management requirements of new energy vehicles and energy storage systems. Utility Model Content

[0007] To address the technical challenges of traditional battery liquid cooling units, such as large size, low redundancy in single-cycle design, unbalanced circulating water pressure in vertical energy storage cabinets, insufficient temperature control accuracy, and the need to improve heat dissipation efficiency and temperature uniformity, this invention provides a liquid cooling temperature control device to achieve the technical effects of reducing equipment size, increasing system redundancy, improving water pressure balance, and improving temperature control accuracy and heat dissipation efficiency.

[0008] The purpose of this utility model is achieved through the following technical solution: a liquid cooling temperature control device, including a housing, and a coolant circulation assembly, a refrigeration circulation assembly and a plate heat exchanger disposed in the housing, wherein the coolant circulation assembly and the refrigeration circulation assembly exchange heat through the plate heat exchanger.

[0009] The refrigeration cycle assembly includes a condenser, a compressor, and a condensing fan. The inlet end of the condenser is connected to the outlet end of the compressor via a pipe, and the inlet end of the compressor is connected to the outlet end of the plate heat exchanger via a pipe. The outlet end of the condenser is connected to the inlet end of the plate heat exchanger via a pipe, and the other inlet end of the plate heat exchanger is connected to the coolant circulation assembly. The condensing fan is stacked on one side of the condenser, the compressor is located on one side of the condenser, and the plate heat exchanger is located on the other side of the condenser. The pipes inside the casing are stacked with each component.

[0010] Furthermore, the coolant circulation assembly includes a water pump, a PTC heater, an inlet pipe assembly, and an outlet pipe assembly. The inlet end of the water pump is connected to the inlet pipe assembly, and the outlet end of the water pump is connected to the plate heat exchanger. The inlet end of the PTC heater is connected to the other outlet end of the plate heat exchanger, and the outlet end of the PTC heater is connected to the outlet pipe assembly. Each inlet pipe assembly has two inlets, which extend out of both sides of the casing. Each outlet pipe assembly has two outlets, which extend out of both sides of the casing and are located on one side of the inlet.

[0011] Furthermore, the housing is also equipped with an electrical control module, which is located on one side of the plate heat exchanger. The electrical control module is stacked with the inlet pipe assembly and the outlet pipe assembly.

[0012] Furthermore, a first pressure sensor, a dryer filter, and an electronic expansion valve are sequentially installed on the pipe at the outlet end of the condenser along the liquid flow direction. The electronic expansion valve is located on the side near the inlet end of the plate heat exchanger. Both the first pressure sensor and the electronic expansion valve are connected to the electronic control module via signal.

[0013] Furthermore, a temperature sensor is also provided on the pipe at the inlet end of the compressor, and the temperature sensor is located on the side close to the inlet end of the compressor; the temperature sensor is signal-connected to the electronic control module.

[0014] Furthermore, a second pressure sensor is provided at the connection end between the water outlet pipe assembly and the PTC heater, and the second pressure sensor is signal-connected to the electronic control module.

[0015] Furthermore, the pipes installed inside the casing are all arranged in a stacked manner to reduce the volume of the casing.

[0016] The beneficial effects of this utility model are as follows: The internal components of this liquid-cooled temperature control device adopt a stacked design, with the condenser fan and condenser, the electronic control module, and the inlet and outlet water pipe assemblies stacked in a layered manner. This significantly reduces the overall size of the equipment, making it much smaller than existing temperature control devices of the same specifications on the market. This solves the problem of the large size of traditional units and is particularly suitable for space-constrained scenarios such as new energy vehicles and energy storage cabinets. In addition, by setting two liquid inlets and two liquid outlets on the inlet and outlet water pipe assemblies respectively, and extending them to both sides of the casing, a dual-sided inlet and outlet water pipe design is achieved. This allows for simultaneous thermal management of two battery packs, improving the system's fault tolerance and redundancy. Even if one battery pack fails, the other battery pack can still operate normally, ensuring the overall system's performance. The energy storage system operates continuously and stably. Furthermore, by installing temperature sensors and first and second pressure sensors connected to the electronic control module, real-time monitoring of system temperature and pressure is achieved. The electronic control module can dynamically adjust the compressor frequency and PTC heating power based on the collected data, achieving efficient and precise temperature control and improving the accuracy and responsiveness of temperature management. Simultaneously, the electronic control module monitors and adjusts the circulating water pressure in real time to ensure water pressure balance in all parts, improving system stability and heat exchange efficiency, and resolving the problem of unbalanced circulating water pressure caused by differences in the potential energy of the battery pack height in the vertical energy storage cabinet. The plate heat exchanger design further enhances heat exchange efficiency, improves the system's heat dissipation capacity and temperature uniformity, effectively extends battery life, and increases the driving range of electric vehicles. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 yes Figure 3 A diagram from another perspective;

[0021] Figure 5 yes Figure 3 A diagram from another perspective.

[0022] The attached figures are labeled as follows: 1-casing, 21-water pump, 22-PTC heater, 23-inlet water pipe assembly, 24-outlet water pipe assembly, 25-second pressure sensor, 31-condenser, 32-compressor, 33-condenser fan, 34-first pressure sensor, 35-drier filter, 36-electronic expansion valve, 37-temperature sensor, 38-pressure switch, 4-plate heat exchanger, and 5-electrical control module. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this application specification is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] Example 1

[0028] See Figure 1-5 A liquid cooling temperature control device includes a housing 1, and a coolant circulation assembly, a refrigeration circulation assembly, and a plate heat exchanger 4 disposed within the housing 1. The coolant circulation assembly and the refrigeration circulation assembly exchange heat through the plate heat exchanger 4.

[0029] The refrigeration cycle assembly includes a condenser 31, a compressor 32, and a condenser fan 33. The inlet end of the condenser 31 is connected to the outlet end of the compressor 32 via a pipe. The inlet end of the compressor 32 is connected to the outlet end of the plate heat exchanger 4 via a pipe (part of the pipe connecting the compressor 32 and the plate heat exchanger 4 is stacked at the bottom of the condenser 31). The outlet end of the condenser 31 is connected to the inlet end of the plate heat exchanger 4 via a pipe. The other inlet end of the plate heat exchanger 4 is connected to the coolant circulation assembly. The condenser fan 33 and the condenser 31 are arranged in a stacked manner. The compressor 32 is located on one side of the condenser 31, and the plate heat exchanger 4 is located on the other side of the condenser 31. The pipes inside the casing 1 are all arranged in a stacked manner with each component. The compressor 32 is also equipped with a pressure switch 38 for adjusting pressure.

[0030] The specific methods of the layered design are as follows: Figure 4 and Figure 5 As shown, combined with Figure 2 As shown in the structural orientation, the pipes are positioned between the condenser 31, the electronic control module 5, the compressor 32, and the bottom of the casing 1 in this embodiment. Figure 5 The piping arrangement is shown. In this embodiment, the inlet pipe assembly 23 and the outlet pipe assembly 24 are both the aforementioned pipes. In the prior art, the pipes are laid directly around the device. However, because they are placed around the device, the length and height of the liquid cooling temperature control device must be increased, resulting in a large volume. In this embodiment, the pipes are laid between the condenser 31, the electronic control module 5, the compressor 32, etc., and the bottom of the casing 1. Therefore, the overall length and height can be reduced, thereby reducing the volume of the device.

[0031] The coolant circulation assembly includes a water pump 21, a PTC heater 22, an inlet pipe assembly 23, and an outlet pipe assembly 24. The inlet end of the water pump 21 is connected to the inlet pipe assembly 23, and the outlet end of the water pump 21 is connected to the plate heat exchanger 4. The inlet end of the PTC heater 22 is connected to the other outlet end of the plate heat exchanger 4, and the outlet end of the PTC heater 22 is connected to the outlet pipe assembly 24. Each inlet pipe assembly 23 has two inlets, which extend out of both sides of the housing 1. Each outlet pipe assembly 24 has two outlets, which extend out of both sides of the housing 1 and are located on one side of the inlets.

[0032] The housing 1 is also provided with an electrical control module 5, which is located on one side of the plate heat exchanger 4. The electrical control module 5, the inlet pipe assembly 23, and the outlet pipe assembly 24 are all stacked in the housing 1 to reduce the volume of the housing.

[0033] In one specific embodiment, part of the water inlet pipe assembly 23 is located at the bottom of the electronic control module 5 and the water pump 21, and part of the water inlet pipe assembly 23 is located at the upper end of the PTC heater 22; the water outlet pipe assembly 24 is located at the bottom of the electronic control module 5 and the condenser 31.

[0034] The condenser 31 has a first pressure sensor 34, a dryer filter 35 and an electronic expansion valve 36 arranged sequentially along the liquid flow direction on the pipe at the outlet end. The electronic expansion valve 36 is located on the side near the inlet end of the plate heat exchanger 4. The first pressure sensor 34 and the electronic expansion valve 36 are both connected to the electronic control module 5.

[0035] A temperature sensor 37 is also provided on the pipe at the inlet end of the compressor 32. The temperature sensor 37 is located on the side near the inlet end of the compressor 32. The temperature sensor 37 is connected to the electronic control module 5 via a signal.

[0036] The connection end between the water outlet pipe assembly and the PTC heater 22 is equipped with a second pressure sensor 25, which is connected to the electronic control module 5.

[0037] In this embodiment, the pipes installed inside the housing 1 are all arranged in a stacked manner to reduce the volume of the housing 1.

[0038] The working principle of the liquid-cooled temperature control device in this embodiment is as follows:

[0039] In the refrigeration cycle assembly, compressor 32 compresses low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas, which then enters condenser 31 through pipes. Condenser fan 33 provides forced air cooling to condenser 31, causing the high-temperature, high-pressure refrigerant gas to condense into a high-pressure liquid within condenser 31. The high-pressure liquid refrigerant then passes through first pressure sensor 34, dryer filter 35, and electronic expansion valve 36, becoming a low-temperature, low-pressure liquid before entering plate heat exchanger 4.

[0040] In the coolant circulation assembly, water pump 21 delivers coolant from inlet pipe assembly 23 to plate heat exchanger 4. In plate heat exchanger 4, the coolant exchanges heat with the low-temperature, low-pressure liquid refrigerant in the refrigeration cycle assembly. The coolant is cooled, while the refrigerant absorbs heat and becomes a low-temperature, low-pressure gas, returning to the compressor inlet 32 ​​to complete one refrigeration cycle.

[0041] The cooled coolant flows out of the plate heat exchanger 4 and into the PTC heater 22. The PTC heater 22 can heat and adjust the temperature of the coolant as needed, and then output it through the outlet pipe assembly 24. The second pressure sensor 25 monitors the pressure at the connection between the outlet pipe assembly and the PTC heater 22 to ensure the normal operation of the system.

[0042] The electronic control module 5 receives signals from the first pressure sensor 34, the temperature sensor 37, and the second pressure sensor 25, and controls the opening degree of the electronic expansion valve 36, the operating status of the compressor 32, and the heating power of the PTC heater 22, thereby achieving precise control of the coolant temperature. In addition, the electronic control module 5 can dynamically adjust the compressor 32 frequency (10-100Hz) and the PTC heating power (0-24kW) to achieve efficient and accurate temperature control.

[0043] The liquid cooling temperature control device in this embodiment combines a coolant circulation component and a refrigeration circulation component, and utilizes a plate heat exchanger 4 for heat exchange, achieving precise control of the coolant temperature. The internal components are rationally arranged: the condenser fan 33 and condenser 31 are stacked; the compressor 32 and plate heat exchanger 4 are located on opposite sides of the condenser 31; the electrical control module 5 is stacked with the inlet pipe assembly 23 and the outlet pipe assembly 24; furthermore, all pipes within the casing 1 are rationally stacked to reduce the volume of the casing 1, making the entire device compact and space-saving.

[0044] Wide temperature management range: no attenuation in heating during low-temperature start-up at -40℃, and COP ≥ 2.2 for cooling at ≤60℃; both the inlet pipe assembly 23 and the outlet pipe assembly 24 have two interfaces, extending to both sides of the casing 1, facilitating connection to external equipment and improving the applicability and flexibility of the device; it can simultaneously manage the thermal of both battery packs, improving the system's fault tolerance. Even if one battery pack malfunctions, the other can still operate normally, ensuring the continuous and stable operation of the entire energy storage system. The dual-sided inlet and outlet pipe design makes the water circulation path more rational, improving cooling and heating efficiency. The electronic control module 5 monitors the system's operating status in real time through various sensors and controls key components to ensure stable and reliable system operation.

[0045] Example 2

[0046] Based on Example 1, the condenser 31 of the liquid-cooled temperature control device in this example adopts a copper tube and aluminum fin structure, which has higher heat dissipation efficiency. The condenser fan 33 is an axial flow fan with an air volume of over 200 CFM, which can effectively improve the heat dissipation effect of the condenser 31. The compressor 32 is a scroll compressor with a cooling capacity of over 2000W and an operating noise of less than 45dB.

[0047] The plate heat exchanger 4 is made of stainless steel, with a heat exchange area of ​​0.5 square meters and a heat exchange efficiency of over 85%. The water pump 21 is a centrifugal pump with a flow rate of approximately 20 L / min. The PTC heater 22 has a heating power of 0-24 kW and can achieve temperature control within the range of -40℃ to 60℃.

[0048] The electronic control module 5 employs a 32-bit microprocessor and features multiple analog and digital input / output interfaces, enabling precise control and monitoring of the system. The first pressure sensor 34 and the second pressure sensor 25 have a measurement range of 0-2 MPa and an accuracy of ±0.5%. The temperature sensor 37 is a PT100 type, with a measurement range of -50℃ to 150℃ and an accuracy of ±0.1℃.

[0049] The dryer filter 35 is filled with molecular sieves, which can effectively remove moisture and impurities from the refrigerant. The electronic expansion valve 36 is driven by a stepper motor, and its opening degree can be precisely adjusted with a response time of less than 1 second.

[0050] Based on Example 1, the liquid cooling temperature control device in this embodiment further improves the system's cooling efficiency, temperature control accuracy, and reliability by selecting high-performance key components.

[0051] Example 3

[0052] Based on Example 1, the housing 1 of the liquid-cooled temperature control device in this example is made of aluminum alloy with an anodized surface, providing excellent heat dissipation and corrosion resistance. The housing 1 measures only 820mm × 700mm × 210mm (length × width × height), achieving a cooling capacity of 83W / L per unit volume, more than 40% higher than similar products. The bottom of the housing 1 is equipped with shock-absorbing rubber pads to effectively reduce vibration during operation.

[0053] The coolant used in the coolant circulation assembly is an ethylene glycol aqueous solution with a concentration of 30%, which has good thermal conductivity and antifreeze properties, and is suitable for a temperature range of -40℃ to 105℃. The inlet pipe assembly 23 and the outlet pipe assembly 24 are made of stainless steel and have standard G1 / 2 threaded interfaces for easy connection to external equipment.

[0054] The refrigerant used in the refrigeration cycle components is R134a, with a charge of 800g, which has good thermodynamic properties and environmental characteristics. The connecting pipe between the condenser 31 and the plate heat exchanger 4 is made of copper pipe with a diameter of 8mm and a wall thickness of 1mm to ensure the system's sealing and pressure resistance.

[0055] The electronic control module 5 is a preferred intelligent integrated electronic control box, equipped with a touch screen that can display system operating parameters and status, and supports multiple control modes, including constant temperature mode, timer mode, and program control mode. Electronic control module 5 also has fault diagnosis and alarm functions; when the system malfunctions, it will issue an audible and visual alarm and display a fault code.

[0056] Based on Example 1, the liquid cooling temperature control device in this embodiment further improves the durability, safety, and user-friendliness of the equipment by optimizing material selection and structural design.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid-cooled temperature control device, comprising a housing, and a coolant circulation assembly, a refrigeration circulation assembly, and a plate heat exchanger disposed within the housing, wherein the coolant circulation assembly and the refrigeration circulation assembly exchange heat through the plate heat exchanger, characterized in that: The refrigeration cycle assembly includes a condenser, a compressor, and a condenser fan. The inlet end of the condenser is connected to the outlet end of the compressor via a pipe. The inlet end of the compressor is connected to the outlet end of the plate heat exchanger via a pipe. The outlet end of the condenser is connected to the inlet end of the plate heat exchanger via a pipe. The other inlet end of the plate heat exchanger is connected to the coolant circulation assembly. The pipes and components inside the casing are arranged in a stacked manner.

2. The liquid cooling temperature control device according to claim 1, characterized in that: The coolant circulation assembly includes a water pump, a PTC heater, an inlet pipe assembly, and an outlet pipe assembly. The inlet end of the water pump is connected to the inlet pipe assembly, and the outlet end of the water pump is connected to the plate heat exchanger. The inlet end of the PTC heater is connected to the other outlet end of the plate heat exchanger, and the outlet end of the PTC heater is connected to the outlet pipe assembly. Each inlet pipe assembly has two inlets, which extend out of both sides of the casing. Each outlet pipe assembly has two outlets, which extend out of both sides of the casing and are located on one side of the inlets.

3. The liquid cooling temperature control device according to claim 2, characterized in that: The casing is also equipped with an electronic control module, which is stacked with the water inlet pipe assembly and the water outlet pipe assembly.

4. The liquid cooling temperature control device according to claim 3, characterized in that: A first pressure sensor, a dryer filter, and an electronic expansion valve are sequentially installed on the pipe at the outlet end of the condenser along the liquid flow direction. The electronic expansion valve is located on the side near the inlet end of the plate heat exchanger. Both the first pressure sensor and the electronic expansion valve are connected to the electronic control module.

5. The liquid cooling temperature control device according to claim 3, characterized in that: A temperature sensor is also installed on the pipe at the inlet end of the compressor, and the temperature sensor is located on the side close to the inlet end of the compressor; the temperature sensor is connected to the electronic control module for signal transmission.

6. The liquid cooling temperature control device according to claim 3, characterized in that: A second pressure sensor is provided at the connection end between the water outlet pipe assembly and the PTC heater, and the second pressure sensor is signal-connected to the electronic control module.

Images