Temperature control system and energy storage device

Abstract

The utility model discloses a temperature control system and an energy storage device, relates to the equipment technical field, the temperature control system comprises a liquid cooling main circuit, a liquid cooling branch circuit, a heat exchange loop, a valve group and a pump group, the liquid cooling main circuit is used for circulating heat exchange fluid capable of realizing heat exchange with a heat management object, the liquid cooling branch circuit is used for reducing the temperature of the heat exchange fluid in the liquid cooling main circuit, and the valve group is used for controlling the pump group. The heat exchange loop dissipates heat to the outside through the compression refrigeration set and exchanges heat with the liquid cooling main path through the heat exchange device, the valve set is used for adjusting the proportion of heat exchange fluid between the liquid cooling main path and the liquid cooling branch path, and the pump set is used for driving the heat exchange fluid in the liquid cooling main path to flow. The temperature of fluid in the liquid cooling main circuit is reduced, the heat exchange loop dissipates heat to the outside through the compression refrigeration set and exchanges heat with the liquid cooling main circuit through the heat exchange device, and by means of the mode that the two kinds of heat exchange are mixed for operation, the auxiliary power consumption of the temperature control system can be greatly reduced, and the efficiency of the temperature control system is improved.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling equipment technology, and more specifically, to a temperature control system and an energy storage device. Background Technology

[0002] With the rapid development of the energy storage industry, energy storage batteries are also being widely used. During the charging and discharging process, energy storage batteries generate a lot of heat, causing the temperature of the energy storage battery and the power converter connected to the energy storage battery to rise continuously. When the ambient temperature around the battery rises to a certain temperature, the reaction speed inside the battery accelerates, which can lead to a reduction in battery life and pose a risk of fire or explosion. On the other hand, if the temperature of the power converter is too high, it will also lead to a reduction in the life of the power converter.

[0003] For energy storage batteries and power converters, liquid cooling units are required in energy storage systems that include these components. These units dissipate heat from the batteries and converters. Traditional liquid cooling systems rely on compressors to drive refrigerant circulation, followed by heat transfer through a complex heat exchange mechanism with a cooling water circuit. However, this process requires continuous high-frequency operation of the compressor, resulting in extremely high power consumption and significant energy loss during heat exchange. This leads to generally low system cooling efficiency. As energy storage systems continue to expand, the energy consumption problem of traditional liquid cooling methods becomes increasingly prominent. Their high energy consumption and low efficiency characteristics are no longer sufficient to meet the stringent requirements for energy storage efficiency and economy. Furthermore, liquid cooling units occupy space within the energy storage system, resulting in low space utilization.

[0004] In conclusion, how to solve the current problem of low energy efficiency in temperature control is an urgent issue that needs to be addressed by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a temperature control system that uses a combination of two heat dissipation methods to reduce the auxiliary power consumption of the temperature control system and improve the efficiency of the temperature control system.

[0006] Another objective of this invention is to provide an energy storage device that includes the above-mentioned temperature control system, making the layout of the energy storage device more compact, which is beneficial for structural integration and space design, and reduces the footprint of the energy storage device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A temperature control system, comprising:

[0009] The liquid-cooled main circuit is used to circulate heat exchange fluid that can exchange heat with the object under heat management;

[0010] A liquid cooling branch is used to reduce the temperature of the heat exchange fluid in the liquid cooling main circuit. The liquid cooling branch is connected to the liquid cooling main circuit and achieves heat exchange with the outside through an external heat exchanger.

[0011] The heat exchange circuit dissipates heat to the outside through the compression refrigeration unit and exchanges heat with the liquid cooling main circuit through the heat exchange device.

[0012] Valve assembly, used to adjust the heat exchange fluid ratio between the liquid cooling main circuit and the liquid cooling branch circuit;

[0013] Pump unit, used to drive the flow of heat exchange fluid in the liquid cooling main circuit.

[0014] Furthermore, this utility model also includes:

[0015] Several liquid cooling passages are used to circulate heat exchange fluids that can exchange heat with the object under heat management. The several liquid cooling passages are connected in parallel and then connected to the main liquid cooling path.

[0016] Furthermore, the pump set of this utility model includes:

[0017] A first pump body is installed on the liquid cooling main circuit and is used to drive the heat exchange fluid to flow in the liquid cooling main circuit, the liquid cooling branch circuit and the liquid cooling passage.

[0018] Furthermore, in this utility model, the valve assembly includes:

[0019] The first three-way valve has an inlet for introducing the heat exchange fluid, and its two outlets are respectively connected to the inlet of the first pump body and the liquid cooling branch.

[0020] Furthermore, the valve assembly further includes:

[0021] The second three-way valve has two inlets that are connected to the first three-way valve and the liquid cooling branch, respectively, and the outlet of the second three-way valve is connected to the inlet of the first pump body.

[0022] Furthermore, in this invention, the heat exchange device is located between the first three-way valve and the second three-way valve, and the heat exchange device is a plate heat exchanger.

[0023] Furthermore, the compression refrigeration unit of this utility model includes:

[0024] A compressor and a condenser are connected in series in the heat exchange circuit, with the condenser located between the heat exchange device and the compressor.

[0025] Furthermore, this utility model also includes:

[0026] A fan, which drives external air through the external heat exchanger and the condenser in sequence.

[0027] Furthermore, each of the liquid cooling branches is equipped with a flow control valve at its inlet end.

[0028] An energy storage device includes a housing, a temperature control cavity and a plurality of heat exchange objects inside the housing, and a temperature control system as described in any of the above claims. The temperature control system is installed in the temperature control cavity, the temperature control cavity has at least one heat dissipation port, and a fan is installed in the heat dissipation port. Heat exchange with the corresponding heat exchange objects is achieved through a plurality of liquid cooling channels.

[0029] The temperature control system provided by this utility model connects the liquid cooling branch and the liquid cooling main circuit during use. The ratio of heat exchange fluid between the liquid cooling main circuit and the liquid cooling branch circuit is adjusted by a valve group. The pump group drives the flow of heat exchange fluid in the liquid cooling main circuit, so that the heat exchange fluid flows in the liquid cooling main circuit and the liquid cooling branch circuit. The liquid cooling branch circuit exchanges heat with the outside through an external heat exchanger to reduce the fluid temperature in the liquid cooling main circuit. The heat exchange circuit dissipates heat to the outside through a compression refrigeration unit and exchanges heat with the liquid cooling main circuit through a heat exchange device. By operating the above two heat exchange methods in a mixed manner, the auxiliary power consumption of the temperature control system can be greatly reduced and the system efficiency of temperature control can be improved. Attached Figure Description

[0030] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the temperature control system provided by this utility model.

[0032] Figure 2 This is a schematic diagram of the axial structure of the energy storage device provided by this utility model.

[0033] Figure 3 This is a schematic diagram of the temperature control cavity provided by this utility model.

[0034] Figure 4 This is a schematic diagram of the axial structure of the temperature control component provided by this utility model.

[0035] Figures 1-4 In the accompanying drawings, the reference numerals include:

[0036] 1. Liquid cooling main circuit; 2. Thermal management object; 3. Liquid cooling branch circuit; 4. External heat exchanger; 5. Heat exchange circuit; 6. Compression refrigeration unit; 601. Compressor; 602. Condenser; 7. Heat exchange device; 8. Valve group; 801. First three-way valve; 802. Second three-way valve; 9. First pump body; 10. Liquid cooling passage; 11. Fan; 12. Housing; 13. Temperature control chamber; 14. Heat dissipation port. Detailed Implementation

[0037] 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.

[0038] The core of this invention is to provide a temperature control system that uses a combination of two heat dissipation methods to reduce the auxiliary power consumption of the temperature control system and improve its efficiency.

[0039] Another core aspect of this invention is to provide an energy storage device that includes the aforementioned temperature control system, making the layout of the energy storage device more compact, which is beneficial for structural integration and space design, and reduces the floor space occupied by the energy storage device.

[0040] Please refer to Figure 1 A temperature control system includes a liquid cooling main circuit 1, a liquid cooling branch circuit 3, a heat exchange circuit 5, a valve group 8, and a pump group.

[0041] The liquid-cooled main circuit 1 is used to circulate heat exchange fluid, which can exchange heat with the thermally managed object 2. The liquid-cooled branch circuit 3 is connected to the liquid-cooled main circuit 1 and is used to circulate heat exchange fluid. This heat exchange fluid is the same as the heat exchange fluid in the liquid-cooled main circuit 1 and exchanges heat with the outside through the external heat exchanger 4 to reduce the fluid temperature in the liquid-cooled main circuit 1. The heat exchange circuit 5 dissipates heat to the outside through the compression refrigeration unit 6 and exchanges heat with the liquid-cooled main circuit 1 through the heat exchange device 7. The valve group 8 is used to adjust the heat exchange fluid ratio between the liquid-cooled main circuit 1 and the liquid-cooled branch circuit 3. The pump group is used to drive the flow of heat exchange fluid in the liquid-cooled main circuit 1.

[0042] In addition, in the above embodiments, the liquid cooling branch 3 reduces the fluid temperature in the liquid cooling main line 1 in at least two ways: One method is to install an external heat exchanger 4 on the liquid cooling branch 3. Through the temperature conversion between the external heat exchanger 4 and the outside environment, the heat exchange fluid flowing through the liquid cooling branch 3 is cooled, thereby cooling the liquid cooling main line 1 and achieving the purpose of cooling the heat exchange object. Another method is to directly utilize the liquid cooling branch 3 for cooling. Specifically, the liquid cooling branch 3 is arranged with bolts or a serpentine pattern to increase the residence time of the heat exchange fluid in the liquid cooling branch 3, thereby achieving the purpose of heat exchange and cooling the liquid cooling main line 1, thus achieving the purpose of cooling the heat exchange object.

[0043] In addition, in the above embodiment, the liquid cooling branch 3 and the heat exchange circuit 5 are not connected. The heat exchange circuit 5 is a separate closed circulation circuit, which achieves cooling with the heat exchange fluid in the liquid cooling main circuit 1 through the heat exchange device 7.

[0044] In addition, the above embodiments also include a control box, which is used to control the valve group 8 and the pump group to control the ratio of heat exchange fluid between the liquid cooling main line 1 and the liquid cooling branch line 3 and the flow rate of the heat exchange fluid in the liquid cooling main line 1 and the liquid cooling branch line 3.

[0045] In addition, the above embodiments also include several infrared thermometers, all of which are electrically connected to the control box in the above embodiments and are used to detect the real-time temperature of the heat exchange object that needs to be cooled, convert the monitored temperature value into an electrical signal and transmit it to the control box, and the control box controls the valve group 8 to perform corresponding actions according to the received signal.

[0046] In the above embodiment, the control box controls the valve group 8 to operate according to the external temperature. Specifically, when the temperature is appropriate, the liquid cooling branch 3 exchanges heat with the external gas to manage the temperature of the heat exchange object. Therefore, only the water pump and fan 11 need to run to achieve heat dissipation. This method has low power consumption and high energy efficiency. When the ambient temperature is appropriate or the heat exchange object is running at low power, it can meet the heat dissipation requirements and achieve a more energy-efficient thermal management effect. When the ambient temperature is higher than the temperature of the coolant, the compression refrigeration unit 6 starts to work. The heat exchange circuit 5 contains refrigerant, and the compression refrigeration unit 6 generates a large amount of cooling capacity. It exchanges heat with the heat exchange fluid in the liquid cooling main circuit 1 through the heat exchange device 7, thereby ensuring heat dissipation of the heat exchange object when the heat exchange object is at high power or the ambient temperature is too good, and ensuring the normal operation of the heat exchange object.

[0047] In use, the liquid cooling branch 3 and the liquid cooling main line 1 are connected, and the heat exchange fluid ratio between the liquid cooling main line 1 and the liquid cooling branch 3 is adjusted by the valve group 8. The pump group is used to drive the flow of heat exchange fluid in the liquid cooling main line 1, so that the heat exchange fluid flows in the liquid cooling main line 1 and the liquid cooling branch 3. The liquid cooling branch 3 exchanges heat with the outside through the external heat exchanger 4 to reduce the fluid temperature in the liquid cooling main line 1. The heat exchange circuit 5 dissipates heat to the outside through the compression refrigeration unit 6 and exchanges heat with the liquid cooling main line 1 through the heat exchange device 7. By operating the above two heat exchange methods in a mixed manner, the auxiliary power consumption of the temperature control system can be greatly reduced and the system efficiency of temperature control can be improved.

[0048] Please refer to Figure 1 In some embodiments, a plurality of liquid cooling passages 10 are also included for circulating heat exchange fluids that can exchange heat with the heat management object 2. The plurality of liquid cooling passages 10 are connected in parallel and connected to the main liquid cooling passage 1. That is, by setting a plurality of liquid cooling passages 10, and each liquid cooling passage 10 is in contact with the corresponding heat exchange object for heat exchange, a set of temperature control systems can perform heat exchange work on multiple sets of heat exchange objects, thereby increasing the utilization rate of the temperature control system and having the effect of reducing costs.

[0049] Optionally, in some embodiments, the connection between the liquid cooling passage 10 and the liquid cooling main passage 1 can be achieved by using a quick-release connector. Specifically, the quick-release structure allows the number of liquid cooling passages 10 to be increased or decreased according to the number of uses, which on the one hand improves the flexibility of the temperature control system and on the other hand reduces the cooling loss of the temperature control system.

[0050] Please refer to Figure 1 In some embodiments, the pump unit includes a first pump body 9, which is installed on the liquid cooling main line 1 and is used to drive the heat exchange fluid to flow in the liquid cooling main line 1, the liquid cooling branch line 3 and the liquid cooling passage 10. The first pump body 9 realizes the flow of the heat exchange fluid in the liquid cooling main line 1, the liquid cooling branch line 3 and the liquid cooling passage 10.

[0051] In some embodiments, the first pump body 9 is located at the inlet connection of the liquid cooling main line 1 and several liquid cooling branch lines 3.

[0052] In other embodiments, the first pump body 9 may be located at the outlet connection of a plurality of liquid cooling branch lines 3 of the liquid cooling main line 1.

[0053] In some other embodiments, a second pump body is also included, wherein the first pump body 9 is disposed at the inlet connection of the main liquid cooling line 1 and a plurality of liquid cooling branch lines 3, and the second pump body is disposed at the outlet connection of the main liquid cooling line 1 and a plurality of liquid cooling branch lines 3.

[0054] Please refer to Figure 1In some embodiments, valve group 8 includes a first three-way valve 801. The inlet of the first three-way valve 801 is used to introduce heat exchange fluid. The two outlets of the first three-way valve 801 are respectively connected to the inlet of the first pump body 9 and the liquid cooling branch 3. That is, the first three-way valve 801 is used to realize the diversion of heat exchange fluid from the liquid cooling main line 1 to the liquid cooling branch 3. Therefore, the first three-way valve 801 adopts an electromagnetic three-way valve and is electrically connected to the control box. When the external temperature is suitable, the first three-way valve 801 opens to the opening of the liquid cooling branch 3. At this time, the heat exchange fluid flows through the liquid cooling branch 3 to exchange heat with the external environment. When the external temperature is not suitable or the heat dissipation requirement increases, the first three-way valve 801 opens to the inlet of the first pump body 9. At the same time, the compression refrigeration unit 6 works. At this time, the heat exchange fluid directly exchanges heat with the heat exchange passage through the heat exchange device 7 to ensure the normal operation of the heat exchange object.

[0055] Please refer to Figure 1 In some embodiments, valve group 8 further includes a second three-way valve 802. The two inlets of the second three-way valve 802 are connected to the first three-way valve 801 and the liquid cooling branch 3, respectively. The outlet of the second three-way valve 802 is connected to the inlet of the first pump body 9. That is to say, the second three-way valve 802 is used to realize the heat exchange fluid from the liquid cooling branch 3 to the liquid cooling main line 1, so that the heat exchange fluid is cooled in the liquid cooling branch 3 and then flows into the liquid cooling main line 1. It can also prevent the heat exchange fluid from flowing back and can play a guiding role for the heat exchange fluid. At the same time, the second three-way valve 802 is an electromagnetic three-way valve and is electrically connected to the control box.

[0056] Optionally, in some embodiments, the heat exchange device 7 is located between the first three-way valve 801 and the second three-way valve 802, and the heat exchange device 7 is a plate heat exchanger.

[0057] Please refer to Figure 1 In some embodiments, the compression refrigeration unit 6 includes a compressor 601 and a condenser 602. Both the compressor 601 and the condenser 602 are connected in series in the heat exchange circuit 5. The condenser 602 is located between the heat exchange device 7 and the compressor 601. That is, when the load on the heat exchange object is large or the ambient temperature is too high, the compressor 601 and the condenser 602 work together to achieve compression refrigeration of the refrigerant in the heat exchange channel. Then, the heat exchange device 7 exchanges heat with the heat exchange fluid in the liquid cooling main circuit 1 to achieve the purpose of cooling the heat exchange object.

[0058] In the above embodiment, a fan 11 is also included, which is used to drive the outside air through the external heat exchanger 4 and the condenser 602 in sequence.

[0059] In some embodiments, the condenser 602 of the compression refrigeration unit 6 can be externally air-cooled, in which case a fan 11 needs to be provided. The corresponding external heat exchanger 4 can also be externally air-cooled, in which case a fan 11 is provided. Fans 11 can be provided separately. In order to make the structure more compact, the fan 11 can be used to allow the airflow passing through the external heat exchanger 4 to enter the condenser 602 of the compression refrigeration unit 6, so that the external airflow first absorbs heat from the external heat exchanger 4 and then absorbs heat from the condenser 602, reducing the number of fans 11, reducing costs and overall size.

[0060] Please refer to Figure 1 In some embodiments, a flow control valve is installed at the inlet of each liquid cooling branch 3. That is, a flow control valve is installed on each of the liquid cooling branches 3 to control the flow rate on the liquid cooling branch 3. When the load of the heat exchange object on the liquid cooling branch 3 changes, the flow control valve opens to a corresponding size. The flow rate is faster when the load is large and slower when the load is small. This can effectively ensure the cooling effect of the heat exchange object and improve the utilization efficiency of the heat exchange fluid in the main liquid cooling line 1, further reducing the energy consumption required by the temperature control system.

[0061] Based on the temperature control system provided in the above embodiments, this utility model also provides an energy storage device, including a housing 12, a temperature control cavity 13 and several heat exchange objects within the housing 12, and the aforementioned temperature control system. The temperature control system is installed in the temperature control cavity 13, which has at least one heat dissipation port 14. A fan 11 is installed at the heat dissipation port 14, and heat exchange with the corresponding heat exchange objects is achieved through several liquid cooling channels 10. Since this energy storage device uses the temperature control system described in the above embodiments, the beneficial effects of this energy storage device can be found in the above embodiments.

[0062] In other words, the key point of this utility model is: by adjusting the heat exchange fluid ratio between the liquid cooling main line 1 and the liquid cooling branch line 3 through the valve group 8, the pump group is used to drive the flow of heat exchange fluid in the liquid cooling main line 1, so that the heat exchange fluid flows in the liquid cooling main line 1 and the liquid cooling branch line 3. The liquid cooling branch line 3 exchanges heat with the outside through the external heat exchanger 4 to reduce the fluid temperature in the liquid cooling main line 1. The heat exchange circuit 5 dissipates heat to the outside through the compression refrigeration unit 6 and exchanges heat with the liquid cooling main line 1 through the heat exchange device 7. By operating the above two heat exchange methods in a mixed manner, the auxiliary power consumption of the temperature control system can be greatly reduced and the system efficiency of temperature control can be improved.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The temperature control system and energy storage device provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A temperature control system, characterized in that, include: The liquid-cooled main circuit (1) is used to circulate heat exchange fluid that can exchange heat with the thermally managed object (2); The liquid cooling branch (3) is used to reduce the temperature of the heat exchange fluid in the liquid cooling main line (1). The liquid cooling branch (3) is connected to the liquid cooling main line (1) and achieves heat exchange with the outside through the external heat exchanger (4). The heat exchange circuit (5) dissipates heat to the outside through the compression refrigeration unit (6) and exchanges heat with the liquid cooling main circuit (1) through the heat exchange device (7); Valve assembly (8) is used to adjust the heat exchange fluid ratio between the liquid cooling main line (1) and the liquid cooling branch line (3); Pump unit for driving the flow of heat exchange fluid in the liquid cooling main circuit (1).

2. The temperature control system according to claim 1, characterized in that, Also includes: Several liquid cooling passages (10) are used to circulate heat exchange fluids that can exchange heat with the thermal management object (2). The several liquid cooling passages (10) are connected in parallel and then connected to the main liquid cooling passage (1).

3. The temperature control system according to claim 2, characterized in that, The pump set includes: The first pump body (9) is installed on the liquid cooling main line (1) and is used to drive the heat exchange fluid to flow in the liquid cooling main line (1), the liquid cooling branch line (3) and the liquid cooling passage (10).

4. The temperature control system according to claim 3, characterized in that, The valve assembly (8) includes: The first three-way valve (801) has an inlet for introducing the heat exchange fluid, and its two outlets are connected to the inlet of the first pump body (9) and the liquid cooling branch (3), respectively.

5. The temperature control system according to claim 4, characterized in that, The valve assembly (8) also includes: The second three-way valve (802) has two inlets that are connected to the first three-way valve (801) and the liquid cooling branch (3), respectively, and the outlet of the second three-way valve (802) is connected to the inlet of the first pump body (9).

6. The temperature control system according to claim 5, characterized in that, The heat exchange device (7) is located between the first three-way valve (801) and the second three-way valve (802), and the heat exchange device (7) is a plate heat exchanger.

7. The temperature control system according to any one of claims 2-6, characterized in that, The compression refrigeration unit (6) includes: A compressor (601) and a condenser (602) are connected in series in the heat exchange circuit (5), and the condenser (602) is located between the heat exchange device (7) and the compressor (601).

8. The temperature control system according to claim 7, characterized in that, Also includes: A fan (11) is used to drive external air through the external heat exchanger (4) and the condenser (602) in sequence.

9. The temperature control system according to any one of claims 1-6, characterized in that, Each of the liquid cooling branches (3) is equipped with a flow control valve at its inlet.

10. An energy storage device, comprising a housing (12), wherein the housing (12) is provided with a temperature control cavity (13) and a plurality of heat exchange objects, characterized in that, It also includes the temperature control system as described in claim 8, wherein the temperature control system is installed in the temperature control cavity (13), the temperature control cavity (13) is provided with at least one heat dissipation port (14), the fan (11) is installed in the heat dissipation port (14), and heat exchange with the corresponding heat exchange object is achieved through a plurality of liquid cooling channels (10).

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