Horizontal type plug-in frame direct cooling unit for temperature control of energy storage battery pack module

Abstract

The utility model provides a horizontal plug-in frame direct cooling unit for energy storage battery pack module temperature control, which comprises a box body, the box body is of a horizontal structure, and a first stop valve and a second stop valve are respectively arranged corresponding to a battery module and are used for forming a loop; the compressor is mounted in the box body, is connected with the first stop valve through a four-way valve and is used for switching the flow direction of a refrigerant; the condenser is mounted in the box body and is connected with the compressor through the four-way valve; and the first electronic expansion valve is connected between the condenser and the second stop valve. The first stop valve and the second stop valve are respectively connected with the battery module to form a complete loop, a direct cooling circulation system is formed by matching with the connection relation between the second stop valve and the first electronic expansion valve, and the effects of efficient heat exchange, energy conservation and the like are achieved; meanwhile, the compressor can also switch the circulation direction through the four-way valve, so that the battery module can be cooled, and the battery module can also be heated in a low-temperature environment.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery temperature control, in particular to a horizontal plug-in frame direct cooling unit for temperature control of an energy storage battery pack module. BACKGROUND

[0002] With the rapid development of new energy storage technology, efficient thermal management of the energy storage battery pack module has become a core problem to ensure safe operation and prolong the service life of the system. A large amount of heat is generated during the charging and discharging of the battery, and if the heat is not dissipated in time, thermal runaway may occur; and the performance of the battery significantly decreases in a low-temperature environment, and needs to be effectively heated to maintain its working efficiency.

[0003] At present, traditional water cooling units are mostly used for temperature control in the energy storage field, which relies on a water circulation system to realize heat transfer. However, such a scheme has obvious defects: first, the water cooling system needs to be configured with complex components such as a water pump, pipelines and a water tank, resulting in a bulky structure, high energy consumption, a risk of water leakage and increased maintenance costs; second, water as a secondary heat exchange medium has a low heat exchange efficiency with the battery, and it is difficult to meet the rapid temperature control requirements of high-density battery modules; in addition, the heating capacity of the traditional water cooling unit is insufficient in a low-temperature environment, and the system integration degree is low, which is difficult to adapt to the requirements of compact layout and high energy density of the energy storage container. Therefore, the above problems need to be solved. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a horizontal plug-in frame direct cooling unit for temperature control of an energy storage battery pack module.

[0005] The application provides a horizontal plug-in frame direct cooling unit for temperature control of an energy storage battery pack module, comprising

[0006] a box body, the box body is of a horizontal structure, and first and second stop valves are arranged in the box body corresponding to the battery module to form a loop;

[0007] a compressor, the compressor is installed in the interior of the box body, connected with the first stop valve through a four-way valve, and used for switching the flow direction of the refrigerant;

[0008] a condenser, the condenser is installed in the interior of the box body, connected with the compressor through the four-way valve;

[0009] a first electronic expansion valve, the first electronic expansion valve is connected between the condenser and the second stop valve.

[0010] Further,

[0011] a first heat exchanger is further arranged between the first electronic expansion valve and the condenser;

[0012] The first heat exchanger comprises a first end connected with the first electronic expansion valve and a second end connected with the four-way valve.

[0013] A one-way valve is further arranged between the second end and the four-way valve, for limiting the flow direction of the refrigerant.

[0014] Further,

[0015] The first heat exchanger further comprises a third end in communication with the first end and a fourth end in communication with the second end.

[0016] The third end and the fourth end are respectively connected with the condenser through a three-way valve.

[0017] A second electronic expansion valve is further arranged on the fourth end, for cooling the refrigerant flowing to the first electronic expansion valve.

[0018] Further,

[0019] A second heat exchanger is further arranged between the first heat exchanger and the condenser.

[0020] The second heat exchanger comprises a fifth end connected with the three-way valve and a sixth end connected with the condenser.

[0021] The fifth end and the sixth end are in communication with each other.

[0022] Further,

[0023] The second heat exchanger further comprises a seventh end and an eighth end in communication with each other.

[0024] The seventh end is connected with the first stop valve.

[0025] The eighth end is connected with the four-way valve, for gasification and heating of the refrigerant entering the compressor.

[0026] Further,

[0027] The eighth end is connected with the four-way valve through an electric three-way valve.

[0028] The electric three-way valve is further connected with the first stop valve, for switching the connection path between the first stop valve and the four-way valve.

[0029] Further,

[0030] The application further comprises a drying filter.

[0031] The drying filter is connected between the condenser and the sixth end, for drying the refrigerant.

[0032] The application has the following advantages and positive effects:

[0033] The first stop valve and the second stop valve are connected with the battery module respectively, a complete loop is formed, and the connection relationship between the second stop valve and the first electronic expansion valve forms a direct cooling circulation system, which has the effects of high heat exchange efficiency, energy saving and the like. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 A structure schematic diagram of the horizontal plug-in frame direct cooling unit for temperature control of the energy storage battery pack module is provided for the embodiments of the present application.

[0035] Fig. 2 A principle diagram of the horizontal plug-in frame direct cooling unit for temperature control of the energy storage battery pack module is provided for the embodiments of the present application.

[0036] The text annotations in the figure are as follows: 100 - box; 110 - first stop valve; 120 - second stop valve; 200 - compressor; 210 - four-way valve; 220 - electric three-way valve; 300 - condenser; 310 - drying filter; 400 - first electronic expansion valve; 500 - first heat exchanger; 510 - check valve; 600 - second electronic expansion valve; and 700 - second heat exchanger. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be described in detail below in combination with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0038] Please refer to Figs. 1-2 The present embodiment provides a horizontal plug-in frame direct cooling unit for temperature control of an energy storage battery pack module, which comprises a box 100, the box 100 is of a horizontal structure, a first stop valve 110 and a second stop valve 120 are arranged correspondingly for the battery module to form a loop; a compressor 200 is installed inside the box 100 and connected with the first stop valve 110 through a four-way valve 210 to switch the flow direction of the refrigerant; a condenser 300 is installed inside the box 100 and connected with the compressor 200 through the four-way valve 210; and a first electronic expansion valve 400 is connected between the condenser 300 and the second stop valve 120.

[0039] In this embodiment, the box body 100 is a horizontal structure, which can better adapt to the compact layout inside the energy storage container; the first stop valve 110 and the second stop valve 120 are arranged on the box body 100 corresponding to the battery module; the first stop valve 110 and the second stop valve 120 are connected with the battery module to form a complete circulation loop.

[0040] In this embodiment, the compressor 200 is installed inside the box body 100, and is connected with the first stop valve 110 through the four-way valve 210; the main function of the compressor 200 is to compress the refrigerant to increase its pressure and temperature, and to switch the flow direction of the refrigerant through the four-way valve 210; in a high-temperature environment in summer, the battery module is prone to performance degradation or even thermal runaway risk due to excessive temperature; at this time, the compressor 200 is started to compress the low-temperature and low-pressure refrigerant into high-temperature and high-pressure gaseous refrigerant, which enters the battery module through the second stop valve 120 for cooling operation after switching by the four-way valve 210; in a low-temperature environment in winter, the four-way valve 210 switches the flow direction of the refrigerant to heat the battery module through the first stop valve 110, so as to ensure that the battery module works in an appropriate temperature range and improves its working efficiency and safety.

[0041] In this embodiment, the condenser 300 is also installed inside the box body 100, and is connected with the compressor 200 through the four-way valve 210; the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 200 enters the condenser 300 and exchanges heat with the external environment in the condenser 300, so that the refrigerant releases heat and cools from gas to liquid; the condenser 300 can adopt air cooling or water cooling for heat dissipation; if air cooling is adopted, a large number of heat dissipation fins are designed on the surface of the condenser 300, and the heat is taken away by the forced air flow of the fan; if water cooling is adopted, the heat is taken away by circulating water, so that the refrigerant can efficiently complete the condensation process to provide liquid refrigerant for the subsequent refrigeration cycle.

[0042] In this embodiment, the first electronic expansion valve 400 is connected between the condenser 300 and the second stop valve 120; the liquid refrigerant flows out of the condenser 300 and passes through the first electronic expansion valve 400; the first electronic expansion valve 400 can accurately adjust the flow and pressure of the refrigerant according to the actual needs of the system; for example, when the temperature of the battery module is high and a large amount of refrigerant is needed for cooling, the first electronic expansion valve 400 will increase the opening degree to make more refrigerant enter the circuit where the battery module is located; on the contrary, when the temperature of the battery module approaches the appropriate temperature, the first electronic expansion valve 400 will reduce the opening degree to avoid excessive supply of refrigerant, so as to achieve the purpose of energy saving and precise temperature control.

[0043] In a preferred embodiment, the first electronic expansion valve 400 is further connected with the condenser 300 through a first heat exchanger 500; the first heat exchanger 500 comprises a first end connected with the first electronic expansion valve 400 and a second end connected with the four-way valve 210; a one-way valve 510 is further arranged between the second end and the four-way valve 210, for limiting the flow direction of the refrigerant.

[0044] In a preferred embodiment, the first heat exchanger 500 is further provided with a third end in communication with the first end and a fourth end in communication with the second end; the third end and the fourth end are respectively connected with the condenser 300 through a three-way valve; a second electronic expansion valve 600 is further arranged on the fourth end, for cooling the refrigerant flowing to the first electronic expansion valve 400.

[0045] In this embodiment, the refrigerant can enter the pipelines on both sides of the first heat exchanger 500 through the three-way valve, and the temperature difference is formed on both sides due to the installation of the first electronic expansion valve 400 on one side, so that the refrigerant flowing to the first electronic expansion valve 400 can be further cooled, thereby improving the cooling effect on the battery module.

[0046] In a preferred embodiment, the first heat exchanger 500 is further connected with the condenser 300 through a second heat exchanger 700; the second heat exchanger 700 comprises a fifth end connected with the three-way valve and a sixth end connected with the condenser 300; the fifth end and the sixth end are in communication with each other.

[0047] In a preferred embodiment, the second heat exchanger 700 is further provided with a seventh end and an eighth end in communication with each other; the seventh end is connected with the first stop valve 110; the eighth end is connected with the four-way valve 210, for gasification and heating of the refrigerant entering the compressor 200.

[0048] In this embodiment, during the refrigeration process, the refrigerant flowing back through the first stop valve 110 and the refrigerant preliminarily cooled by the condenser 300 will enter the second heat exchanger 700 for heat exchange, at this time, the temperature of the backflow refrigerant is relatively low, and by heat exchange with the refrigerant flowing out of the condenser 300, the other party can be cooled twice, and the self can be heated and gasified to avoid entering the compressor 200 in the form of liquid.

[0049] In a preferred embodiment, the eighth end and the four-way valve 210 are connected through an electric three-way valve 220; the electric three-way valve 220 is further connected with the first stop valve 110, for switching the connection path between the first stop valve 110 and the four-way valve 210.

[0050] In the embodiment, the electric three-way valve 220 is connected with the fourth-way valve 210, the first stop valve 110 and the eighth end of the second heat exchanger 700 respectively; thus, the communication between the fourth-way valve 210, the eighth end and the first stop valve 110 can be switched at will, thereby meeting the requirements of different paths during refrigeration and heating.

[0051] In a preferred embodiment, the system further comprises a drying filter 310, which is connected between the condenser 300 and the sixth end, for drying the refrigerant.

[0052] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method and the core idea of the present application. The above description is only the preferred embodiment of the present application. It should be pointed out that, due to the limitation of language expression, there are infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the present application, or the above technical features can be combined in an appropriate manner; the improvements, decorations, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A horizontal plug-in frame direct cooling unit for temperature control of an energy storage battery pack module, characterized in that, The utility model relates to a kind of direct cooling unit for temperature control of energy storage battery pack module, comprising Box (100), the box (100) is horizontal structure, corresponding battery module is respectively provided with first stop valve (110) and second stop valve (120), for forming loop; Compressor (200), the compressor (200) is installed in the inside of the box (100), is connected with the first stop valve (110) by four-way valve (210), for switching the flow direction of refrigerant; Condenser (300), the condenser (300) is installed in the inside of the box (100), is connected with the compressor (200) by the four-way valve (210); First electronic expansion valve (400), the first electronic expansion valve (400) is connected between the condenser (300) and second stop valve (120).

2. The horizontal direct cooling unit for temperature control of energy storage battery pack module according to claim 1, wherein A first heat exchanger (500) is further arranged between the first electronic expansion valve (400) and the condenser (300); The first heat exchanger (500) comprises a first end connected with the first electronic expansion valve (400) and a second end connected with the four-way valve (210); A one-way valve (510) is further arranged between the second end and the four-way valve (210) for limiting the flow direction of refrigerant.

3. The horizontal direct cooling unit for temperature control of energy storage battery pack module according to claim 2, wherein A third end in communication with the first end and a fourth end in communication with the second end are further arranged on the first heat exchanger (500); The third end and the fourth end are connected with the condenser (300) through a three-way valve respectively; A second electronic expansion valve (600) is further arranged on the fourth end for cooling the refrigerant flowing to the first electronic expansion valve (400).

4. The horizontal direct cooling unit for temperature control of energy storage battery pack module according to claim 3, wherein A second heat exchanger (700) is further arranged between the first heat exchanger (500) and the condenser (300); The second heat exchanger (700) comprises a fifth end connected with the three-way valve and a sixth end connected with the condenser (300); The fifth end and the sixth end are in communication with each other.

5. The horizontal direct cooling unit for temperature control of energy storage battery pack module according to claim 4, wherein A seventh end and an eighth end in communication with each other are further arranged on the second heat exchanger (700); The seventh end is connected with the first stop valve (110); The eighth end is connected with the four-way valve (210) for heating the refrigerant entering the compressor (200) to be vaporized.

6. The horizontal direct cooling unit for temperature control of energy storage battery pack module according to claim 5, wherein The eighth end and the four-way valve (210) are connected through an electric three-way valve (220); The electric three-way valve (220) is further connected with the first stop valve (110) for switching the connection path between the first stop valve (110) and the four-way valve (210).

7. The horizontal plug-in frame direct-cooling unit for temperature control of an energy storage battery pack module according to claim 4, characterized in that, a drying filter (310) is further included; the drying filter (310) is connected between the condenser (300) and the sixth end, and is used for drying the refrigerant.

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