Thermal management system of energy storage system, energy storage system and thermal management method of energy storage system

Abstract

The embodiment of the invention relates to the technical field of energy storage, in particular to a thermal management system of an energy storage system, the energy storage system and a thermal management method of the energy storage system. The heat management system of the energy storage system comprises a first heat exchange loop and an energy storage module, the first heat exchange loop can exchange heat with a battery module so as to adjust the temperature of the battery module, and the energy storage module can be communicated with the first heat exchange loop so as to store heat or cold in the first heat exchange loop. And the energy storage module can transfer the stored heat or cold energy to the battery module. The energy storage module is arranged to store heat or cold, when the battery module needs to be cooled, the cold stored by the energy storage module can be transmitted to the battery module, and when the battery module needs to be heated, the heat stored by the energy storage module can be transmitted to the battery module, so that the temperature adjusting effect on the battery module is improved; and energy can be fully utilized, and the heat management cost of the energy storage system is reduced.

Description

Technical Field

[0001] The embodiments of this specification relate to the field of energy storage technology, and in particular, to a thermal management system of an energy storage system, an energy storage system and a thermal management method thereof. Background Art

[0002] In the prior art, in order to ensure the normal operation of the energy storage system, a heat exchange loop is usually set up to exchange heat with the battery module in the energy storage system, thereby adjusting the temperature of the battery module. However, the heat generated by the battery module during charging and discharging is not utilized, and the cold energy generated by the heat exchange loop during refrigeration is not fully utilized, which not only reduces the temperature regulation effect of the battery module, but also increases the cost of thermal management of the energy storage system.

[0003] Therefore, there is an urgent need for a thermal management system of an energy storage system, an energy storage system and a thermal management method thereof to solve the above problems. Summary of the invention

[0004] The purpose of the embodiments of this specification is to provide a thermal management system for an energy storage system, an energy storage system and a thermal management method thereof, so as to improve the temperature regulation effect of the battery module, make full use of energy, and reduce the cost of thermal management of the energy storage system.

[0005] To achieve this purpose, the embodiments of this specification adopt the following technical solutions:

[0006] A thermal management system for an energy storage system, comprising:

[0007] a first heat exchange circuit, the first heat exchange circuit being capable of exchanging heat with the battery module to adjust the temperature of the battery module; and

[0008] An energy storage module, wherein the energy storage module can be connected to the first heat exchange circuit to store heat or cold in the first heat exchange circuit, and the energy storage module can transfer the stored heat or cold to the battery module.

[0009] As an optional solution, the energy storage module includes a first energy storage component, the first energy storage component includes a first energy storage part, a first connecting pipeline and a first regulating valve, the interior of the first energy storage part is filled with energy storage material, the first connecting pipeline is arranged in the energy storage material of the first energy storage part, the first end of the first connecting pipeline is connected to the first heat exchange circuit, the second end of the first connecting pipeline is connected to the first connecting valve port of the first regulating valve, and the second connecting valve port and the third connecting valve port of the first regulating valve are both connected and connected to the first heat exchange circuit; and / or

[0010] The energy storage module includes a second energy storage component, which includes a second energy storage member, a third connecting pipeline and a third regulating valve. The interior of the second energy storage member is filled with energy storage material. The third connecting pipeline is penetrated through the energy storage material of the second energy storage member. The first end of the third connecting pipeline is connected to the first heat exchange circuit, and the second end of the third connecting pipeline is connected to the first connecting valve port of the third regulating valve. The second connecting valve port and the third connecting valve port of the third regulating valve are both connected and connected to the first heat exchange circuit.

[0011] As an optional solution, the thermal management system of the energy storage system further includes a second heat exchange circuit, and the second heat exchange circuit is used to adjust the temperature of the electric energy conversion device;

[0012] The first energy storage component further includes a second connecting pipeline and a second regulating valve, the second connecting pipeline is also arranged in the energy storage material of the first energy storage member, the first end of the second connecting pipeline is connected to the second heat exchange circuit, the second end of the second connecting pipeline is connected to the first connecting valve port of the second regulating valve, and the second connecting valve port and the third connecting valve port of the second regulating valve are both connected to the second heat exchange circuit; and / or

[0013] The second energy storage component also includes a fourth connecting pipeline and a fourth regulating valve. The fourth connecting pipeline is also arranged in the energy storage material of the second energy storage component. The first end of the fourth connecting pipeline is connected to the second heat exchange circuit, and the second end of the fourth connecting pipeline is connected to the first connecting valve port of the fourth regulating valve. The second connecting valve port and the third connecting valve port of the fourth regulating valve are both connected and connected to the second heat exchange circuit.

[0014] As an optional solution, the first heat exchange circuit is connected to a compressor, and the first connecting pipeline and the compressor can be connected in sequence.

[0015] As an optional solution, the energy storage module further includes a first transmission pipeline, a fifth regulating valve, a sixth regulating valve, a seventh regulating valve and a second transmission pipeline, wherein a first end of the first transmission pipeline is communicated with a first end of the first communication pipeline through the fifth regulating valve, a second end of the first transmission pipeline is communicated with a first end of the third communication pipeline through the sixth regulating valve, a first end of the second transmission pipeline is communicated with the first communication pipeline through the seventh regulating valve, and a second end of the second transmission pipeline is communicated with the first heat exchange circuit;

[0016] When the first energy storage assembly and the second energy storage assembly both store cold energy generated by the first heat exchange circuit, the third connecting pipeline, the first transmission pipeline, the first connecting pipeline, and the second transmission pipeline are connected in sequence.

[0017] As an optional solution, the thermal management system of the energy storage system further includes a shunt module, and the shunt module is preset with a cold storage mode, a cold release mode, a heat storage mode and a heat release mode;

[0018] When the flow splitter module is in the cold storage mode, the flow splitter module stores the cold energy generated by the first heat exchange circuit in the energy storage module;

[0019] When the shunt module is in the cooling mode, the shunt module transfers the cooling energy stored in the energy storage module to the battery module;

[0020] When the shunt module is in the heat storage mode, the shunt module stores the heat released by the battery module in the energy storage module through the first heat exchange circuit;

[0021] When the shunt module is in the heat release mode, the shunt module transfers the heat stored in the energy storage module to the battery module through the first heat exchange loop.

[0022] As an optional solution, the first heat exchange circuit is connected to a first radiator, and a first cooling fan is arranged opposite to the first radiator;

[0023] The thermal management system of the energy storage system further includes a first heat dissipation chamber, on which a first ventilation member capable of communicating with the outside is disposed, and the first heat dissipation chamber contains the first radiator and the first heat dissipation fan.

[0024] As an optional solution, the first heat exchange circuit includes:

[0025] a first temperature regulating member, the first temperature regulating member being used for exchanging heat for the battery module;

[0026] a first pipeline, wherein a first end of the first pipeline is in communication with the first temperature regulating member;

[0027] a first valve group, the first valve group having a first valve port, a second valve port, a third valve port and a fourth valve port, when the first valve port is connected to the fourth valve port, the second valve port is connected to the third valve port, when the first valve port is connected to the third valve port, the second valve port is connected to the fourth valve port; the second end of the first pipeline is connected to the fourth valve port;

[0028] a second pipeline, wherein a first end of the second pipeline is communicated with the second valve port, a second end of the second pipeline is communicated with the first valve port, and a compressor is connected to the second pipeline;

[0029] a third pipeline, a first end of the third pipeline being connected to the third valve port, and the third pipeline being connected to the first radiator;

[0030] A second valve group, wherein the second valve group has a first interface, a second interface, a third interface and a fourth interface. When the first interface is connected to the fourth interface, the second interface is connected to the third interface. When the first interface is connected to the third interface, the second interface is connected to the fourth interface. The second end of the third pipeline is connected to the third interface.

[0031] a fourth pipeline, wherein a first end of the fourth pipeline is connected to the second interface, a second end of the fourth pipeline is connected to the first interface, and a throttling mechanism is connected to the fourth pipeline;

[0032] A fifth pipeline, wherein a first end of the fifth pipeline is communicated with the fourth interface, and a second end of the fifth pipeline is communicated with the first temperature regulating member.

[0033] As an optional solution, the diversion module includes:

[0034] a first three-way valve, disposed on the third pipeline, wherein a first connecting valve port of the first three-way valve is communicated with a first end of the first radiator, a second connecting valve port of the first three-way valve is communicated with the third interface, and a third connecting valve port of the first three-way valve is communicated with a first end of the energy storage module;

[0035] a second three-way valve, wherein a first connecting valve port of the second three-way valve is communicated with a second end of the first radiator, and a second connecting valve port of the second three-way valve is communicated with a second end of the energy storage module;

[0036] a third three-way valve, disposed on the fifth pipeline, wherein a first connecting valve port of the third three-way valve is connected to the fourth interface, and a second connecting valve port of the third three-way valve is connected to the fifth pipeline;

[0037] a first branch pipe, wherein a first end of the first branch pipe is communicated with a third connecting valve port of the third three-way valve, and a second end of the first branch pipe is communicated with a first end of the energy storage module;

[0038] a second branch pipe, wherein a first end of the second branch pipe is connected to the first pipeline, and a second end of the second branch pipe is connected to a third connecting valve port of the second three-way valve;

[0039] a fourth three-way valve, disposed in the first pipeline, wherein a first connecting valve port of the fourth three-way valve is communicated with the fourth interface, and a second connecting valve port of the fourth three-way valve is communicated with the first pipeline; and

[0040] A third branch pipe, wherein the first end of the third branch pipe is communicated with the first end of the third pipeline, the second end of the third branch pipe is communicated with the third connecting valve port of the fourth three-way valve, and a fluorine pump is arranged on the third branch pipe.

[0041] An energy storage system includes a battery module and the thermal management system of the energy storage system as described above, wherein the first heat exchange circuit is used to adjust the temperature of the battery module.

[0042] A thermal management method for an energy storage system is applied to the energy storage system as described above, and the thermal management method for the energy storage system comprises the following steps:

[0043] When the first heat exchange circuit starts the compression cooling mode, the energy storage module can store the cold energy generated by the first heat exchange circuit;

[0044] When the battery module is charged and discharged, the heat generated by the battery module can be stored in the energy storage module through the first heat exchange circuit;

[0045] When the battery module needs to be cooled, the cold energy stored in the energy storage module can be transferred to the battery module;

[0046] When the battery module needs to be heated, the heat stored in the energy storage module can be transferred to the battery module.

[0047] The embodiments of this specification provide a thermal management system for an energy storage system, which includes a first heat exchange circuit and an energy storage module, wherein the first heat exchange circuit can exchange heat with a battery module to adjust the temperature of the battery module, the energy storage module can be connected to the first heat exchange circuit to store heat or cold in the first heat exchange circuit, and the energy storage module can transfer the stored heat or cold to the battery module. The thermal management system of the energy storage system provided in the embodiments of this specification stores heat or cold by setting an energy storage module, and when the battery module needs to be cooled, the cold stored in the energy storage module can be transferred to the battery module, and when the battery module needs to be heated, the heat stored in the energy storage module can be transferred to the battery module, thereby improving the temperature regulation effect of the battery module, and can make full use of energy, reducing the cost of thermal management of the energy storage system.

[0048] The embodiments of this specification also provide an energy storage system, which improves the temperature regulation effect of the battery module by applying the thermal management system of the energy storage system, and can fully utilize energy, thereby reducing the cost of thermal management of the energy storage system.

[0049] The embodiments of this specification also provide a thermal management method for an energy storage system, which is applied to the above-mentioned energy storage system, improves the temperature regulation effect of the battery module, can fully utilize energy, and reduces the cost of thermal management of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 1 of this specification. Figure 1 ;

[0051] Figure 2 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 1 of this specification. Figure 2 ;

[0052] Figure 3 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 1 of this specification. Figure 3 ;

[0053] Figure 4 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 1 of this specification. Figure 4 ;

[0054] Figure 5 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 2 of this specification. Figure 1 ;

[0055] Figure 6 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 2 of this specification. Figure 2 ;

[0056] Figure 7 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 2 of this specification. Figure 3 ;

[0057] Figure 8 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 2 of this specification. Figure 4 ;

[0058] Fig. 9 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 2 of this specification. Figure 5 ;

[0059] Fig.10 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 2 of this specification. Figure 6 ;

[0060] Fig.11 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 2 of this specification. Figure 7 ;

[0061] Fig.12 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 3 of this specification. Figure 1 ;

[0062] Fig.13 This is a schematic diagram of the structure of the thermal management system of the energy storage system provided in Example 3 of this specification. Figure 2 .

[0063] In the figure:

[0064] 20. Electric energy conversion equipment; 30. Battery module; 301. Battery pack;

[0065] 1. First heat exchange circuit; 11. First radiator; 110. First cooling fan; 111. First cooling bin; 12. First pipeline; 13. First valve group; s1. First valve port; s2. Second valve port; s3. Third valve port; s4. Fourth valve port; 14. Second pipeline; 141. Compressor; 142. Gas-liquid separator; 15. Third pipeline; 16. Second valve group; z1. First interface; z2. Second interface; z3. Third interface; z4. Fourth interface; 17. Fourth pipeline; 171. First liquid reservoir; 172. First filter; 173. Throttling mechanism; 18. Fifth pipeline;

[0066] 2. Energy storage module; 21. First energy storage assembly; 211. First energy storage member; 212. First communication pipeline; 213. Second communication pipeline; 214. First regulating valve; 215. Second regulating valve; 22. Second energy storage assembly; 221. Second energy storage member; 222. Third communication pipeline; 223. Fourth communication pipeline; 224. Third regulating valve; 225. Fourth regulating valve; 23. First transmission pipeline; 24. Fifth regulating valve; 25. Sixth regulating valve; 26. Seventh regulating valve; 27. Second transmission pipeline;

[0067] 3. Second heat exchange circuit; 31. Second radiator; 310. Second cooling fan; 311. Second cooling bin; 312. Partition; 32. Exhaust pipeline; 33. Return pipeline; 34. Water pump; 35. Second liquid reservoir; 36. Second filter;

[0068] 4. Diversion module; 41. First three-way valve; 42. Second three-way valve; 43. First branch pipe; 44. Third three-way valve; 45. Second branch pipe; 46. Third branch pipe; 461. Fluorine pump; 47. Fourth three-way valve. DETAILED DESCRIPTION

[0069] In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the embodiments of this specification clearer, the technical solutions of the embodiments of this specification are further explained below in conjunction with the drawings and through specific implementation methods.

[0070] In the description of the embodiments of this specification, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this specification can be understood according to specific circumstances.

[0071] In the embodiments of this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0072] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the embodiments of this specification. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0073] Embodiment 1

[0074] In the related art, in order to ensure the normal operation of the energy storage system, a heat exchange loop is usually set up to exchange heat with the battery module in the energy storage system, so as to adjust the temperature of the battery module. However, the heat generated by the battery module during charging and discharging is not utilized, and the cold energy generated by the heat exchange loop during cooling is not fully utilized, which not only reduces the temperature regulation effect of the battery module, but also increases the cost of thermal management of the energy storage system.

[0075] In order to solve the above problems, Figure 1 to Figure 4As shown, this embodiment provides a thermal management system for an energy storage system, which includes a first heat exchange loop 1 and an energy storage module 2, wherein the first heat exchange loop 1 can exchange heat with the battery module 30 to adjust the temperature of the battery module 30, and the energy storage module 2 can be connected to the first heat exchange loop 1 to store heat or cold in the first heat exchange loop 1, and the energy storage module 2 can transfer the stored heat or cold to the battery module 30. The thermal management system of the energy storage system provided in this embodiment stores heat or cold by setting the energy storage module 2, and when the battery module 30 needs to be cooled, the cold stored in the energy storage module 2 can be transferred to the battery module 30, and when the battery module 30 needs to be heated, the heat stored in the energy storage module 2 can be transferred to the battery module 30, thereby improving the temperature regulation effect of the battery module 30, and can make full use of energy, thereby reducing the cost of thermal management of the energy storage system.

[0076] Optionally, in this embodiment, the interior of the energy storage module 2 is filled with energy storage material, and a heat exchange tube is penetrated inside the energy storage module 2, the heat exchange tube is wrapped by the energy storage material, and the heat exchange tube can be connected to the first heat exchange loop 1, the energy storage material can absorb the heat or cold brought by the heat exchange tube, thereby undergoing a phase change to store the absorbed energy, and the energy storage material can undergo a phase change to input the stored energy into the first heat exchange loop 1 through the heat exchange tube.

[0077] In this embodiment, if Figure 1 to Figure 4 As shown, the thermal management system of the energy storage system further includes a shunt module 4, which is preset with a cold storage mode, a cold release mode, a heat storage mode and a heat release mode, wherein, Figure 1 As shown, when the flow splitter module 4 is in the cold storage mode, the flow splitter module 4 stores the cold energy generated by the first heat exchange loop 1 in the energy storage module 2; Figure 2 As shown, when the shunt module 4 is in the cooling mode, the shunt module 4 transfers the cooling energy stored in the energy storage module 2 to the battery module 30; Figure 3 As shown, when the shunt module 4 is in the heat storage mode, the shunt module 4 stores the heat released by the battery module 30 in the energy storage module 2 through the first heat exchange loop 1; Figure 4 As shown, when the shunt module 4 is in the heat release mode, the shunt module 4 transfers the heat stored in the energy storage module 2 to the battery module 30 through the first heat exchange loop 1 .

[0078] Optionally, in this embodiment, during the off-peak period, when the first heat exchange circuit 1 does not need to cool down each battery pack 301 in the battery module 30 (for example, at night in summer), the off-peak period is used to make the first heat exchange circuit 1 perform compression refrigeration. At this time, the shunt module 4 is in the cold storage mode, so that the shunt module 4 stores the cold energy generated by the compression refrigeration of the first heat exchange circuit 1 in the energy storage module 2. The off-peak period is used to make the first heat exchange circuit 1 perform compression refrigeration, and the generated cold energy is stored through the energy storage module 2, thereby reducing costs. Optionally, when it is necessary to cool down each battery pack 301 in the battery module 30, the shunt module 4 is in the cold release mode, and the shunt module 4 transfers the cold energy stored in the energy storage module 2 to the battery module 30, without starting the first heat exchange circuit 1 for compression refrigeration, which is more energy-efficient. Optionally, when each battery pack 301 in the battery module 30 generates heat during charging and discharging, when the shunt module 4 is in the heat storage mode, the shunt module 4 releases the heat released by the battery module 30 to the medium circulating in the first heat exchange loop 1 in the form of heat exchange, and then performs heat exchange with the medium circulating in the first heat exchange loop 1 through the energy storage module 2, thereby storing the heat released by the battery module 30 in the energy storage module 2 through the first heat exchange loop 1. Optionally, when the external environment is low and the battery module 30 needs to be statically heated (that is, each battery pack 301 in the battery module 30 is in a non-charging and discharging state), the shunt module 4 is in the heat release mode, and the shunt module 4 transfers the heat stored in the energy storage module 2 to the battery module 30 through the first heat exchange loop 1 to ensure the normal startup of the battery module 30.

[0079] Optionally, in this embodiment, if Figure 1 to Figure 4 As shown, the first heat exchange loop 1 is connected to the first radiator 11, and the first heat dissipation fan 110 is arranged opposite to the first radiator 11. The thermal management system of the energy storage system also includes a first heat dissipation chamber 111, and the first heat dissipation chamber 111 is provided with a first ventilation member (not shown in the figure) that can be connected to the outside world. The first heat dissipation chamber 111 contains the first radiator 11 and the first heat dissipation fan 110. The above arrangement can realize the cooling of the medium circulating in the first heat exchange loop 1 through the first radiator 11 and the medium circulating in the first heat exchange loop 1, and can promote the circulation of the first heat dissipation chamber 111 and the external environment through the first heat dissipation fan 110, thereby improving the cooling and heat exchange effect of the medium circulating in the first heat exchange loop 1.

[0080] In this embodiment, the first heat exchange circuit 1 includes a first temperature regulating member (not shown in the figure), a first pipeline 12, a first valve group 13, a second pipeline 14, a third pipeline 15, a second valve group 16, a fourth pipeline 17 and a fifth pipeline 18, wherein the first temperature regulating member is used to exchange heat for the battery module 30, the first end of the first pipeline 12 is connected to the first temperature regulating member, the first valve group 13 has a first valve port s1, a second valve port s2, a third valve port s3 and a fourth valve port s4, when the first valve port s1 is connected to the fourth valve port s4, the second valve port s2 is connected to the third valve port s3, when the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the second end of the first pipeline 12 is connected to the fourth valve port s4, the first end of the second pipeline 14 is connected to the second valve port s2, the second end of the second pipeline 14 is connected to the first valve port s1 is connected, the second pipeline 14 is connected to a compressor 141, the first end of the third pipeline 15 is connected to the third valve port s3, the third pipeline 15 is connected to the first radiator 11, the second valve group 16 has a first interface z1, a second interface z2, a third interface z3 and a fourth interface z4, when the first interface z1 is connected to the fourth interface z4, the second interface z2 is connected to the third interface z3, when the first interface z1 is connected to the third interface z3, the second interface z2 is connected to the fourth interface z4, the second end of the third pipeline 15 is connected to the third interface z3, the first end of the fourth pipeline 17 is connected to the second interface z2, the second end of the fourth pipeline 17 is connected to the first interface z1, the fourth pipeline 17 is connected to a throttling mechanism 173, the first end of the fifth pipeline 18 is connected to the fourth interface z4, and the second end of the fifth pipeline 18 is connected to the first temperature regulating member. The structural design of the first heat exchange loop 1 makes the first heat exchange loop 1 in the form of direct cooling. The first heat exchange loop 1 achieves temperature regulation of the battery module 30 in the form of direct cooling, which is more energy-saving and environmentally friendly. Optionally, in this embodiment, the first valve group 13 and the second valve group 16 are both four-way valves. It should be noted that the first temperature regulating member can be a flow channel set in each battery pack 301.

[0081] In this embodiment, if Figure 1 to Figure 4As shown, the flow dividing module 4 provided in this embodiment includes a first three-way valve 41, a second three-way valve 42, a first branch pipe 43, a third three-way valve 44, a second branch pipe 45, a third branch pipe 46 and a fourth three-way valve 47, wherein the first three-way valve 41 is arranged on the third pipeline 15, the first connecting valve port of the first three-way valve 41 is communicated with the first end of the first radiator 11, the second connecting valve port of the first three-way valve 41 is communicated with the third interface z3, the third connecting valve port of the first three-way valve 41 is communicated with the first end of the energy storage module 2, the first connecting valve port of the second three-way valve 42 is communicated with the second end of the first radiator 11, the second connecting valve port of the second three-way valve 42 is communicated with the second end of the energy storage module 2, the third three-way valve 44 is arranged on the fifth pipeline 18, and the third three-way valve 4 The first connecting valve port of the third three-way valve 44 is connected to the fifth pipeline 18, the first end of the first branch pipe 43 is connected to the third connecting valve port of the third three-way valve 44, the second end of the first branch pipe 43 is connected to the first end of the energy storage module 2, the first end of the second branch pipe 45 is connected to the first pipeline 12, the second end of the second branch pipe 45 is connected to the third connecting valve port of the second three-way valve 42, the fourth three-way valve 47 is arranged on the first pipeline 12, the first connecting valve port of the fourth three-way valve 47 is connected to the fourth interface z4, the second connecting valve port of the fourth three-way valve 47 is connected to the first pipeline 12, the second end of the third branch pipe 46 is connected to the third connecting valve port of the fourth three-way valve 47, and the third branch pipe 46 is provided with a fluorine pump 461. By designing the flow diversion module 4 into a plurality of three-way valves and a plurality of branches, the four diversion modes of the flow diversion module 4, namely, the cold storage mode, the cold release mode, the heat storage mode and the heat release mode, are realized, so that the structure is simple and the operation is reliable.

[0082] Specifically, if Figure 1As shown, when the flow dividing module 4 is in the cold storage mode, the first heat exchange circuit 1 performs compression refrigeration, the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the first interface z1 is connected to the third interface z3, and the second interface z2 is connected to the fourth interface z4; and the third connecting valve port of the fourth three-way valve 47 is disconnected, and the first connecting valve port and the second connecting valve port of the fourth three-way valve 47 are connected, so as to realize the connection between the first pipeline 12 and the fourth valve port s4 of the first valve group 13; the first connecting valve port of the second three-way valve 42 is disconnected, and the second connecting valve port of the second three-way valve 42 is connected to the third connecting valve port, thereby connecting the energy storage module 2 The second end of the first branch pipe 45 is connected to the second end of the second branch pipe 45; the third connecting valve port of the first three-way valve 41 is disconnected, and the first connecting valve port of the first three-way valve 41 is connected to the second connecting valve port, so that the first three-way valve 41 disconnects the communication between the first end of the energy storage module 2 and the second end of the third pipeline 15, and the first three-way valve 41 conducts the first end of the first radiator 11 and the second end of the third pipeline 15; the second connecting valve port of the third three-way valve 44 is disconnected, and the first connecting valve port of the third three-way valve 44 is connected to the third connecting valve port, so that the third three-way valve 44 conducts the first end of the first branch pipe 43 and the fourth interface z4, and the third three-way valve 44 disconnects the fourth interface z4 from the first temperature control The medium discharged from the first pipeline 12 enters the second pipeline 14 through the fourth valve port s4 and the second valve port s2 in sequence. After being compressed and cooled by the compressor 141 in the second pipeline 14, the medium enters the third pipeline 15 through the first valve port s1 and the third valve port s3 in sequence. After being heat exchanged and cooled by the first radiator 11 in the third pipeline 15, the medium enters the fourth pipeline 17 through the first connecting valve port of the first three-way valve 41, the second connecting valve port of the first three-way valve 41, the third port z3 and the first port z1 in sequence. After being throttled by the throttling mechanism 173 in the fourth pipeline 17, the medium enters the fourth pipeline 17 through the second port z2 and the fourth port z3 in sequence. Port z4 enters the fifth pipeline 18, passes through the first connecting valve port of the third three-way valve 44 and the third connecting valve port of the third three-way valve 44 in the fifth pipeline 18 to enter the first branch pipe 43, and then enters the energy storage module 2 through the first branch pipe 43. The energy storage module 2 stores the cold energy of the medium flowing through the fifth pipeline 18. The flowing medium is heated by heat exchange after passing through the energy storage module 2. The flowing medium passes through the second connecting valve port of the second three-way valve 42 and the third connecting valve port of the second three-way valve 42 in turn to enter the second branch pipe 45, and then flows back to the first pipeline 12 through the second branch pipe 45, and repeats this process, so that the energy storage module 2 continuously stores cold energy.

[0083] like Figure 2As shown, when the flow diversion module 4 is in the cooling release mode, the first connecting valve port of the fourth three-way valve 47 is disconnected, and the second connecting valve port of the fourth three-way valve 47 is connected to the third connecting valve port, so that the fourth three-way valve 47 conducts the second end of the third branch pipe 46 with the first pipeline 12, and the fourth three-way valve 47 disconnects the first pipeline 12 from the fourth valve port s4; the third connecting valve port of the second three-way valve 42 is disconnected, and the first connecting valve port of the second three-way valve 42 is connected to the second connecting valve port, so that the second three-way valve 42 conducts the second end of the energy storage module 2 with the first end of the third pipeline 15, and the second three-way valve 42 disconnects the second end of the energy storage module 2 with the second end of the second branch pipe 45; the valve ports of the first valve group 13 and the first three-way valve 41 are all in a blocked state, so that the first three-way valve 41 disconnects the first end of the energy storage module 2 with the second end of the third pipeline 15, and the first three-way valve 41 disconnects the first end of the first radiator 11 with the second end of the third pipeline 15; the first connecting valve port of the third three-way valve 44 is disconnected, The second connecting valve port and the third connecting valve port of the third three-way valve 44 are connected, so that the third three-way valve 44 connects the first end of the first branch pipe 43 with the first temperature regulating member, and the third three-way valve 44 disconnects the fourth interface z4 from the first temperature regulating member. At this time, the medium discharged from the first pipeline 12 enters the third branch pipe 46 through the fourth three-way valve 47. Driven by the power of the fluorine pump 461 in the third branch pipe 46, the medium in the third branch pipe 46 passes through the first end of the third pipeline 15, and then enters the energy storage module 2 through the second three-way valve 42. The energy storage module 2 releases cold energy, so that the medium after passing through the energy storage module 2 is cooled, and then enters the first branch pipe 43, passes through the third three-way valve 44 and enters the first temperature regulating member, so that the medium in the first temperature regulating member exchanges heat with each battery pack 301 in the battery module 30 to achieve cooling of each battery pack 301. At this time, the medium in the first temperature regulating member exchanges heat and heats up, and then flows back to the first pipeline 12, and repeats this process. It should be noted that, after the cold energy stored in the energy storage module 2 is released, the first heat exchange circuit 1 can start the compression cooling work for the battery module 30, thereby reducing the usage rate of the first cooling fan 110 and reducing noise.

[0084] like Figure 3As shown, when the flow dividing module 4 is in the heat storage mode, the first heat exchange circuit 1 performs compression refrigeration, the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the first interface z1 is connected to the third interface z3, and the second interface z2 is connected to the fourth interface z4; the third connecting valve port of the fourth three-way valve 47 is disconnected, and the first connecting valve port and the second connecting valve port of the fourth three-way valve 47 are connected, so that the fourth three-way valve 47 disconnects the connection between the second end of the third branch pipe 46 and the first pipeline 12, and the fourth three-way valve 47 connects the first pipeline 12 and the fourth valve port s4; the third connecting valve port of the second three-way valve 42 is disconnected, and the first connecting valve port of the second three-way valve 42 is connected. The valve port and the second connecting valve port are connected, so that the second three-way valve 42 connects the second end of the energy storage module 2 and the second end of the third pipeline 15, and the second three-way valve 42 disconnects the second end of the energy storage module 2 and the second end of the second branch pipe 45; the first connecting valve port of the first three-way valve 41 is disconnected, and the third connecting valve port and the second connecting valve port of the first three-way valve 41 are connected, so that the first three-way valve 41 connects the first end of the energy storage module 2 and the second end of the third pipeline 15, and the first three-way valve 41 disconnects the first end of the first radiator 11 and the second end of the third pipeline 15; the third connecting valve port of the third three-way valve 44 is disconnected, and the first connecting valve port and the second connecting valve port of the third three-way valve 44 are connected, so that The third three-way valve 44 disconnects the first end of the first branch pipe 43 and the second end of the fifth pipeline 18, and the third three-way valve 44 connects the fourth interface z4 and the fifth pipeline 18. At this time, the medium discharged from the first pipeline 12 passes through the fourth valve port s4 and the second valve port s2 in sequence to enter the second pipeline 14, and after being compressed and refrigerated by the compressor 141 in the second pipeline 14, passes through the first valve port s1 and the third valve port s3 in sequence to enter the first end of the third pipeline 15, and passes through the second three-way valve 42 at the first end of the third pipeline 15 to enter the energy storage module 2. The energy storage module 2 stores the heat of the medium flowing through, so that the energy storage module 2 performs heat exchange and cooling on the medium. The medium flows into the second end of the third pipeline 15 through the first three-way valve 41, and then enters the fourth pipeline 17 through the third interface z3 and the first interface z1 in sequence, and enters the fifth pipeline 18 through the second interface z2 and the fourth interface z4 in sequence after the throttling action of the throttling mechanism 173 in the fourth pipeline 17, and enters the first temperature regulating member after passing through the third three-way valve 44 in the fifth pipeline 18, so that the medium in the first temperature regulating member exchanges heat with each battery pack 301 in the battery module 30, thereby cooling each battery pack 301. At this time, the medium in the first temperature regulating member exchanges heat and heats up, and then flows back to the first pipeline 12, and repeats this process.

[0085] like Figure 4As shown, when the flow diversion module 4 is in the heat release mode, the first heat exchange circuit 1 simultaneously operates in the heat pump mode, when the first valve port s1 is connected to the fourth valve port s4, the second valve port s2 is connected to the third valve port s3, the first interface z1 is connected to the fourth interface z4, and the second interface z2 is connected to the third interface z3; the third connecting valve port of the fourth three-way valve 47 is disconnected, and the first connecting valve port and the second connecting valve port of the fourth three-way valve 47 are connected, so that the fourth three-way valve 47 disconnects the second end of the third branch pipe 46 from the first pipeline 12, and the fourth three-way valve 47 connects the fourth valve port s4 and the first pipeline 12; the third connecting valve port of the second three-way valve 42 is disconnected, The first connecting valve port and the second connecting valve port of the second three-way valve 42 are connected, so that the second three-way valve 42 connects the second end of the energy storage module 2 with the second end of the third pipeline 15, and the second three-way valve 42 disconnects the second end of the energy storage module 2 with the second end of the second branch pipe 45; the first connecting valve port of the first three-way valve 41 is disconnected, and the second connecting valve port and the third connecting valve port of the first three-way valve 41 are connected, so that the first three-way valve 41 connects the first end of the energy storage module 2 with the second end of the third pipeline 15, and the first three-way valve 41 disconnects the first end of the first radiator 11 with the second end of the third pipeline 15; the third connecting valve port of the third three-way valve 44 is disconnected, and the first three-way valve 41 is connected. The first connecting valve port and the second connecting valve port of the three-way valve 44 are connected, so that the third three-way valve 44 disconnects the first end of the first branch pipe 43 from the second end of the fifth pipeline 18, and the third three-way valve 44 connects the fifth pipeline 18 with the fourth interface z4. At this time, the medium in the fifth pipeline 18 passes through the fourth interface z4 and the first interface z1 in turn into the fourth pipeline 17, passes through the throttling mechanism 173 in the fourth pipeline 17, and then passes through the second interface z2 and the third interface z3 in turn into the second end of the third pipeline 15, and passes through the first three-way valve 41 at the second end of the third pipeline 15 into the energy storage module 2, and the energy storage module 2 releases heat The amount of heat exchange between the medium and the energy storage module 2 is increased, and then the medium passes through the second three-way valve 42 to enter the first end of the third pipeline 15, and then passes through the third valve port s3 and the second valve port s2 to enter the second pipeline 14 in sequence. After the compressor 141 increases the pressure and temperature in the second pipeline 14, the medium passes through the first valve port s1 and the fourth valve port s4 to enter the first pipeline 12 in sequence. The medium passes through the first temperature regulating member on the first pipeline 12 to exchange heat with the battery module 30, so as to heat the battery module 30. The medium in the first temperature regulating member exchanges heat with the battery module 30 and cools down, and then flows back to the fifth pipeline 18, and so on. In addition, the above arrangement enables the energy storage module 2 to be located upstream of the compressor 141 when the first heat exchange loop 1 is operating in the heat pump mode, so that the medium in the first heat exchange loop 1 has been heated by the energy storage module 2 before flowing into the compressor 141, which plays the function of replenishing air and increasing enthalpy for the compressor 141, and further improves the heat pump working capacity of the first heat exchange loop 1.

[0086] Optionally, in this embodiment, if Figure 1 to Figure 4 As shown, the fourth pipeline 17 is also connected to the first liquid reservoir 171 and the first filter 172, so that it is convenient to replenish the medium into the first heat exchange loop 1 through the first liquid reservoir 171. The setting of the first filter 172 is also convenient for filtering impurities in the medium to avoid pipeline blockage. Optionally, in this embodiment, the second pipeline 14 is also connected to the gas-liquid separator 142, and the medium in the second pipeline 14 passes through the gas-liquid separator 142 and then enters the compressor 141, thereby separating the gas and liquid in the medium to ensure the normal operation of the compressor 141.

[0087] This embodiment also provides an energy storage system, which includes a battery module 30 and the thermal management system of the energy storage system described above, and the first heat exchange loop 1 is used to adjust the temperature of the battery module 30. The energy storage system provided in this embodiment improves the temperature regulation effect of the battery module 30 by applying the thermal management system of the energy storage system described above, and can fully utilize energy, thereby reducing the cost of thermal management of the energy storage system.

[0088] This embodiment further provides a thermal management method for an energy storage system, which is applied to the above energy storage system. The thermal management method for the energy storage system includes the following steps:

[0089] When the first heat exchange loop 1 starts the compression cooling mode, the energy storage module 2 can store the cold energy generated by the first heat exchange loop 1;

[0090] When the battery module 30 is charged and discharged, the heat generated by the battery module 30 can be stored in the energy storage module 2 through the first heat exchange loop 1;

[0091] When the battery module 30 needs to be cooled, the cold energy stored in the energy storage module 2 can be transferred to the battery module 30;

[0092] When the battery module 30 needs to be heated, the heat stored in the energy storage module 2 can be transferred to the battery module 30 .

[0093] The thermal management method for the energy storage system provided in this embodiment improves the temperature regulation effect of the battery module 30, and can fully utilize energy, thereby reducing the cost of thermal management of the energy storage system.

[0094] Specifically, in this embodiment, when the first heat exchange loop 1 starts the compression cooling mode and the shunt module 4 is in the cold storage mode, the energy storage module 2 stores the cold energy generated by the first heat exchange loop 1; when the battery module 30 is charged and discharged and the shunt module 4 is in the heat storage mode, the heat generated by the battery module 30 is stored in the energy storage module 2 through the first heat exchange loop 1; when the battery module 30 needs to be cooled and the shunt module 4 is in the cold release mode, the cold energy stored in the energy storage module 2 is transferred to the battery module 30; when the battery module 30 needs to be heated and the shunt module 4 is in the heat release mode, the heat stored in the energy storage module 2 is transferred to the battery module 30. Since the specific connectivity relationship of the shunt module 4 in each mode has been described above, it will not be repeated here.

[0095] Embodiment 2

[0096] The thermal management system of the energy storage system provided in this embodiment is basically the same as that in the first embodiment. The thermal management system of the energy storage system provided in this embodiment is different from that in the first embodiment in that:

[0097] In this embodiment, if Figures 5 to 11 As shown, the energy storage module 2 includes a first energy storage component 21, which can be selectively connected to the first heat exchange circuit 1 to transfer the heat stored in the first energy storage component 21 to the battery module 30 through the first heat exchange circuit 1, thereby improving the heating effect on the battery module 30. Specifically, the first energy storage component 21 includes a first energy storage member 211, a first connecting pipeline 212 and a first regulating valve 214. The first energy storage member 211 is filled with energy storage material. The first connecting pipeline 212 is arranged in the energy storage material of the first energy storage member 211. The first end of the first connecting pipeline 212 is connected to the first heat exchange circuit 1, and the second end of the first connecting pipeline 212 is connected to the first connecting valve port of the first regulating valve 214. The second connecting valve port and the third connecting valve port of the first regulating valve 214 are connected to the first heat exchange circuit 1. The structural design of the above-mentioned first energy storage component 21 enables the first energy storage member 211 to be selectively connected to the first heat exchange circuit 1 through the first connecting pipeline 212. Optionally, in this embodiment, the first regulating valve 214 is a three-way valve.

[0098] In this embodiment, if Figures 5 to 11As shown, the energy storage module 2 also includes a second energy storage component 22, which can be selectively connected to the first heat exchange circuit 1 to store the cold energy generated by the heat exchange of the first heat exchange circuit 1. Specifically, the second energy storage component 22 includes a second energy storage member 221, a third connecting pipeline 222 and a third regulating valve 224. The interior of the second energy storage member 221 is filled with energy storage materials. The third connecting pipeline 222 is arranged in the energy storage material of the second energy storage member 221. The first end of the third connecting pipeline 222 is connected to the first heat exchange circuit 1, and the second end of the third connecting pipeline 222 is connected to the first connecting valve port of the third regulating valve 224. The second connecting valve port and the third connecting valve port of the third regulating valve 224 are both connected to the first heat exchange circuit 1. The structural design of the above-mentioned second energy storage component 22 enables the second energy storage member 221 to be selectively connected to the first heat exchange circuit 1 through the third connecting pipeline 222. Optionally, in this embodiment, the third regulating valve 224 is a three-way valve.

[0099] In this embodiment, if Figures 5 to 11 As shown, the thermal management system of the energy storage system also includes a second heat exchange loop 3, which is used to adjust the temperature of the electric energy conversion device 20. The first energy storage component 21 can be selectively connected to the second heat exchange loop 3 to store the heat generated by the heat exchange of the second heat exchange loop 3, and the second energy storage component 22 can be selectively connected to the second heat exchange loop 3 to transfer the cold stored in the second energy storage component 22 to the electric energy conversion device 20 through the second heat exchange loop 3. The above-mentioned configuration enables the first energy storage component 21 to store the heat generated when the second heat exchange loop 3 cools down the electric energy conversion device 20 for heat exchange. Even if the second heat exchange loop 3 and the first heat exchange loop 1 are not working at the same time, energy can be stored, the operating efficiency of the first heat exchange loop 1 is improved, and the first heat exchange loop 1 is assisted to perform static heating on the battery module 30, so as to make full use of the heat in the second heat exchange loop 3. The second energy storage component 22 can also transfer the stored cold to the electric energy conversion device 20 through the second heat exchange loop 3, thereby improving the cooling effect on the electric energy conversion device 20. Even if the second heat exchange loop 3 and the first heat exchange loop 1 are not working at the same time, energy can be stored to reduce the energy consumption of the second heat exchange loop 3, so as to fully utilize the cold in the first heat exchange loop 1. In summary, the thermal management system of the energy storage system provided in this embodiment effectively improves the efficiency of the thermal management system of the entire energy storage system.

[0100] In this embodiment, if Figures 5 to 11As shown, the first energy storage component 21 also includes a second connecting pipeline 213 and a second regulating valve 215. The second connecting pipeline 213 is also arranged in the energy storage material of the first energy storage member 211. The first end of the second connecting pipeline 213 is connected to the second heat exchange circuit 3. The second end of the second connecting pipeline 213 is connected to the first connecting valve port of the second regulating valve 215. The second connecting valve port and the third connecting valve port of the second regulating valve 215 are both connected to the second heat exchange circuit 3. The structural design of the first energy storage component 21 enables the first energy storage member 211 to be selectively connected to the second heat exchange circuit 3 through the second connecting pipeline 213. Optionally, in this embodiment, the second regulating valve 215 is a three-way valve.

[0101] like Figures 5 to 11 As shown, the second energy storage component 22 also includes a fourth connecting pipeline 223 and a fourth regulating valve 225. The fourth connecting pipeline 223 is also arranged in the energy storage material of the second energy storage member 221. The first end of the fourth connecting pipeline 223 is connected to the second heat exchange circuit 3, and the second end of the fourth connecting pipeline 223 is connected to the first connecting valve port of the fourth regulating valve 225. The second connecting valve port and the third connecting valve port of the fourth regulating valve 225 are both connected to the second heat exchange circuit 3. The structural design of the second energy storage component 22 enables the second energy storage member 221 to be selectively connected to the second heat exchange circuit 3 through the fourth connecting pipeline 223. Optionally, in this embodiment, the fourth regulating valve 225 is a three-way valve.

[0102] Specifically, if Figure 5 As shown, when the first heat exchange loop 1 needs to start the heat pump mode to perform static heating on the battery module 30, and when the electric energy conversion device 20 needs to be cooled and heat-exchanged at the same time, the first energy storage component 21 acts as a heat exchanger, and the heat generated by the heating device in the electric energy conversion device 20 is transferred to the first energy storage component 21 through the second heat exchange loop 3, so that the first energy storage component 21 transfers the heat to the first heat exchange loop 1, which not only improves the operating efficiency of the first heat exchange loop 1, but also assists the first heat exchange loop 1 to perform static heating on the battery module 30, and also realizes the cooling of the electric energy conversion device 20; as shown in FIG. Figure 6 As shown, when the first heat exchange loop 1 needs to start the heat pump mode to perform static heating on the battery module 30, and the electric energy conversion device 20 does not need to be cooled down at this time, since the first energy storage component 21 stores heat, the first energy storage component 21 can transfer the stored heat to the battery module 30 through the first heat exchange loop 1, thereby improving the operating efficiency of the first heat exchange loop 1 and assisting the first heat exchange loop 1 to perform static heating on the battery module 30; Figure 7As shown, during the valley period, when there is no need to adjust the temperature of the power conversion device 20 and the battery module 30, the first heat exchange loop 1 can start the compression cooling mode, and the cold energy generated by the first heat exchange loop 1 is stored in the second energy storage assembly 22; Figure 8 As shown, when the battery module 30 is charged and discharged, the electric energy conversion device 20 needs to be cooled and heat exchanged, and the first heat exchange loop 1 performs compression refrigeration to cool the battery module 30, and the heat generated by the second heat exchange loop 3 when cooling the electric energy conversion device 20 is stored in the first energy storage component 21. Fig. 9 As shown, when the battery module 30 is charged and discharged, the electric energy conversion device 20 needs to be cooled and heat exchanged. The first heat exchange loop 1 performs compression refrigeration to cool the battery module 30, and when the heat storage of the first energy storage component 21 reaches the limit, the first energy storage component 21 no longer stores the heat generated by the electric energy conversion device 20. The second energy storage component 22 transfers the stored cold energy to the electric energy conversion device 20 through the second heat exchange loop 3, thereby achieving a cooling effect on the electric energy conversion device 20. Fig.10 As shown, when the battery module 30 is charged and discharged, the electric energy conversion device 20 is cooled and heat exchanged through the second heat exchange circuit 3, and the battery module 30 is cooled by opening the compression cooling mode through the first heat exchange circuit 1, and when the heat stored in the first energy storage component 21 reaches the limit and the cold stored in the second energy storage component 22 reaches the limit, the first energy storage component 21 and the second energy storage component 22 are disconnected from the first heat exchange circuit 1 and the second heat exchange circuit 3. Fig.11 As shown, the battery module 30 is charged and discharged, and the electric energy conversion device 20 is cooled and heat-exchanged through the second heat exchange circuit 3. The battery module 30 is cooled by turning on the compression cooling mode through the first heat exchange circuit 1. When the electric energy conversion device 20 needs to be further cooled, the second energy storage component 22 acts as a heat exchanger. Part of the cold energy generated by the first heat exchange circuit 1 is used to cool the battery module 30, and part of it is transferred to the second energy storage component 22, so that the cold energy of the second energy storage component 22 assists the second heat exchange circuit 3 in heat exchange and cooling the electric energy conversion device 20, thereby reducing the energy consumption of the second heat exchange circuit 3.

[0103] Optionally, in this embodiment, the first connecting pipe 212 and the compressor 141 can be connected in sequence. Specifically, when the first heat exchange circuit 1 heats the battery module 30, the flow direction of the medium in the first heat exchange circuit 1, the first connecting pipe 212 is located upstream of the compressor 141. The above arrangement enables the medium in the first heat exchange circuit 1 to be heated by the first energy storage component 21 before flowing into the compressor 141, which plays the function of replenishing air and increasing enthalpy for the compressor 141, and further improves the heat pump working capacity of the first heat exchange circuit 1.

[0104] In this embodiment, the second heat exchange circuit 3 is connected to a second radiator 31, and a second cooling fan 310 is arranged opposite the second radiator 31. The thermal management system of the energy storage system also includes a second heat dissipation bin 311, and the second heat dissipation bin 311 contains the second radiator 31 and the second cooling fan 310. The second heat dissipation bin 311 is provided with a second ventilation member (not shown in the figure) that can communicate with the outside world. A partition 312 is arranged between the second heat dissipation bin 311 and the first heat dissipation bin 111, and the partition 312 can isolate the first heat dissipation bin 111 and the second heat dissipation bin 311 or connect the first heat dissipation bin 111 and the second heat dissipation bin 311. When the ambient temperature is low and the battery module 30 needs to be heated statically, the first heat exchange loop 1 starts the heat pump mode. At this time, the partition 312 can be connected to the first heat dissipation chamber 111 and the second heat dissipation chamber 311, and the first ventilation member on the first heat dissipation chamber 111 is closed, the second ventilation member on the second heat dissipation chamber 311 is closed, and the first heat dissipation fan 110 and the second heat dissipation fan 310 are turned on, so that the heat generated by the second heat exchange loop 3 when cooling and exchanging heat with the electric energy conversion device 20 is diffused into the first heat dissipation chamber 111, thereby heating the first radiator 11, and further improving the operation efficiency of the first heat exchange loop 1. When heat exchange is not required between the first heat dissipation chamber 111 and the second heat dissipation chamber 311, the partition 312 can be made to isolate the first heat dissipation chamber 111 and the second heat dissipation chamber 311, and it is determined whether to open the ventilation members on each chamber according to the actual situation. In addition, by setting up a second radiator 31, heat exchange can be performed between the second radiator 31 and the medium flowing in the second heat exchange loop 3, thereby cooling the medium flowing in the second heat exchange loop 3, and the second cooling fan 310 can be used to promote circulation between the second heat dissipation chamber 311 and the external environment, thereby improving the cooling and heat exchange effect of the medium flowing in the second heat exchange loop 3.

[0105] Optionally, in this embodiment, if Figures 5 to 11 As shown, the second heat exchange circuit 3 includes a second temperature regulating member (not shown in the figure), a discharge pipeline 32 and a return pipeline 33, wherein the second temperature regulating member is used to cool and exchange heat for the electric energy conversion device 20, the inlet of the discharge pipeline 32 is connected to the outlet of the first temperature regulating member, the inlet of the return pipeline 33 is connected to the outlet of the discharge pipeline 32, the outlet of the return pipeline 33 is connected to the inlet of the first temperature regulating member, and the first end of the second connecting pipeline 213 is connected to the inlet of the return pipeline 33, the second end of the second connecting pipeline 213 is connected to the outlet of the discharge pipeline 32 through the second regulating valve 215, the first end of the fourth connecting pipeline 223 is connected to the outlet of the return pipeline 33, and the second end of the fourth connecting pipeline 223 is connected to the outlet of the return pipeline 33 through the fourth regulating valve 225.

[0106] Optionally, in this embodiment, the second heat exchange circuit 3 is a liquid-cooled heat exchange circuit, and the second heat exchange circuit 3 also includes a water pump 34 connected to the return pipe 33. Driven by the water pump 34, the coolant in the second temperature regulating component exchanges heat with the heating device in the electric energy conversion device 20 and then flows into the discharge pipe 32. Through the discharge pipe 32, it selectively enters the second connecting pipe 213 or the second radiator 31 for heat exchange and cooling and flows into the return pipe 33. In the return pipe 33, it can selectively flow into the fourth connecting pipe 223 according to the actual working conditions, and then flow into the first temperature regulating component through the return pipe 33 for heat exchange, and so on.

[0107] Optionally, in this embodiment, the return pipeline 33 is also connected to a second liquid reservoir 35 and a second filter 36, so as to facilitate the replenishment of coolant into the second heat exchange circuit 3 through the second liquid reservoir 35. The setting of the second filter 36 also facilitates filtering impurities in the coolant to avoid pipeline blockage.

[0108] Optionally, in other embodiments, the second heat exchange loop 3 may also be a thermosyphon heat exchange loop, the discharge pipeline 32 is an evaporation tube, the return pipeline 33 is a return liquid tube, the second temperature regulating member is an evaporative cold plate, and the evaporative cold plate is fitted with the electric energy conversion device 20. The low-temperature liquid medium in the second temperature regulating member is converted into a high-temperature gaseous medium after heat exchange with the heating device in the electric energy conversion device 20 and flows into the discharge pipeline 32, and selectively enters the second connecting pipeline 213 or the second radiator 31 through the discharge pipeline 32 for heat exchange and cooling, thereby being converted into a low-temperature liquid medium and flowing into the return pipeline 33, and can selectively flow into the fourth connecting pipeline 223 in the return pipeline 33 according to the actual working conditions, and then flow into the second temperature regulating member through the return pipeline 33 for heat exchange, and so on, thereby realizing cooling of the electric energy conversion device 20. By designing the second heat exchange circuit 3 as a thermal siphon heat exchange circuit, the medium undergoes phase change during the circulation and heat exchange process, and the density difference is used as the power of the circulation, which not only ensures the heat dissipation effect but also eliminates the need for additional power parts to drive the circulation, making the structure simple.

[0109] Specifically, if Figure 5As shown, when the first heat exchange circuit 1 needs to start the heat pump mode to heat the battery module 30 statically, and the electric energy conversion device 20 needs to be cooled and heat exchanged at the same time, at this time, the first valve port s1 is connected to the fourth valve port s4, the second valve port s2 is connected to the third valve port s3, the first interface z1 is connected to the fourth interface z4, the second interface z2 is connected to the third interface z3, and the second regulating valve 215 is connected to the second end of the second connecting pipeline 213 and the outlet of the exhaust pipeline 32, and the fourth regulating valve 225 disconnects the second end of the fourth connecting pipeline 223 from the outlet of the return pipeline 33, the first regulating valve 214 connects the second end of the first connecting pipeline 212 with the second end of the third pipeline 15, and the third regulating valve 224 disconnects the second end of the third connecting pipeline 222 from the second end of the fifth pipeline 18. At this time, the coolant in the second temperature regulating member exchanges heat with the heating device in the electric energy conversion device 20 and flows into the discharge pipeline 32, and enters the second connecting pipeline 213 through the discharge pipeline 32. The medium in the fifth pipeline 18 is cooled by heat exchange and flows into the return pipeline 33, and then flows into the first temperature regulating member in the return pipeline 33 for heat exchange, and this cycle is repeated to achieve cooling of the electric energy conversion device 20. At this time, the medium in the fifth pipeline 18 passes through the fourth interface z4 and the first interface z1 in turn to enter the fourth pipeline 17, passes through the throttling mechanism 173 in the fourth pipeline 17, and then passes through the second interface z2 and the third interface z3 in turn to enter the second end of the third pipeline 15, and in the third pipeline 15, the medium passes through the first interface z4 and the second interface z3. The first regulating valve 214 at the two ends enters the first connecting pipeline 212, absorbs heat and enters the first end of the third pipeline 15, then passes through the third valve port s3 and the second valve port s2 in turn to enter the second pipeline 14, and passes through the first valve port s1 and the fourth valve port s4 in turn to enter the first pipeline 12 after being pressurized and heated by the compressor 141 in the second pipeline 14, and exchanges heat with the battery module 30 through the first temperature regulating member on the first pipeline 12 to achieve heating of the battery module 30. The above arrangement enables the first energy storage component 21 to act as a heat exchanger, and the heat generated by the heating device in the electric energy conversion device 20 is transferred to the first energy storage component 21 through the second heat exchange circuit 3, so that the first energy storage component 21 transfers heat to the first heat exchange circuit 1, which not only improves the operating efficiency of the first heat exchange circuit 1, but also assists the first heat exchange circuit 1 in static heating of the battery module 30, and also achieves cooling of the electric energy conversion device 20.

[0110] like Figure 6As shown, when the first heat exchange circuit 1 needs to start the heat pump mode to statically heat the battery module 30, and the electric energy conversion device 20 does not need to be cooled at this time, at this time, the first valve port s1 is connected to the fourth valve port s4, the second valve port s2 is connected to the third valve port s3, the first interface z1 is connected to the fourth interface z4, the second interface z2 is connected to the third interface z3, and the second regulating valve 215 disconnects the second end of the second connecting pipeline 213 and the outlet of the discharge pipeline 32, the fourth regulating valve 225 disconnects the second end of the fourth connecting pipeline 223 and the outlet of the return pipeline 33, the first regulating valve 214 connects the second end of the first connecting pipeline 212 and the second end of the third pipeline 15, the third regulating valve 224 disconnects the second end of the third connecting pipeline 222 and the second end of the fifth pipeline 18, At this time, the medium in the fifth pipeline 18 passes through the fourth interface z4 and the first interface z1 in turn into the fourth pipeline 17, passes through the throttling mechanism 173 in the fourth pipeline 17, passes through the second interface z2 and the third interface z3 in turn into the second end of the third pipeline 15, passes through the first regulating valve 214 at the second end of the third pipeline 15 into the first connecting pipeline 212, absorbs heat and enters the first end of the third pipeline 15, and then passes through the third valve port s3 and the second valve port s2 in turn into the second pipeline 14, passes through the compressor 141 in the second pipeline 14 to increase the pressure and temperature, and passes through the first valve port s1 and the fourth valve port s4 in turn into the first pipeline 12, and exchanges heat with the battery module 30 through the first temperature adjustment component on the first pipeline 12 to achieve heating of the battery module 30. The above arrangement enables the first energy storage assembly 21 to transfer the stored heat to the battery module 30 through the first heat exchange circuit 1, thereby improving the operating efficiency of the first heat exchange circuit 1 and assisting the first heat exchange circuit 1 in performing static heating on the battery module 30.

[0111] like Figure 7As shown, during the valley power period, and when there is no need to adjust the temperature of the electric energy conversion device 20 and the battery module 30, at this time, the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the first interface z1 is connected to the third interface z3, the second interface z2 is connected to the fourth interface z4, and the second regulating valve 215 disconnects the second end of the second connecting pipeline 213 from the outlet of the discharge pipeline 32, the fourth regulating valve 225 disconnects the second end of the fourth connecting pipeline 223 from the outlet of the return pipeline 33, the first regulating valve 214 disconnects the second end of the first connecting pipeline 212 from the second end of the third pipeline 15, and the third regulating valve 224 connects the second end of the third connecting pipeline 222 with the second end of the fifth pipeline 18. At this time, the medium discharged from the first pipeline 12 passes through the fourth valve port s4 and the second valve port s 2 enters the second pipeline 14, is compressed and refrigerated by the compressor 141 in the second pipeline 14, and then passes through the first valve port s1 and the third valve port s3 to enter the third pipeline 15. After passing through the first radiator 11 in the third pipeline 15 for heat exchange and cooling, it passes through the third interface z3 and the first interface z1 to enter the fourth pipeline 17 in sequence. After passing through the throttling effect of the throttling mechanism 173 in the fourth pipeline 17, it passes through the second interface z2 and the fourth interface z4 to enter the fifth pipeline 18 in sequence. In the fifth pipeline 18, it passes through the third regulating valve 224 to enter the third connecting pipeline 222, so that the second energy storage member 221 stores the coldness of the medium in the third connecting pipeline 222. The circulating medium passes through the third connecting pipeline 222 for heat exchange and temperature rise and then flows back to the first pipeline 12, and this reciprocating process allows the second energy storage member 221 to continuously store coldness.

[0112] like Figure 8As shown, when the battery module 30 is charged and discharged, the electric energy conversion device 20 needs to be cooled and heat exchanged, and the first heat exchange circuit 1 performs compression refrigeration to cool the battery module 30, at this time, the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the first interface z1 is connected to the third interface z3, the second interface z2 is connected to the fourth interface z4, and the second regulating valve 215 conducts the second end of the second connecting pipeline 213 and the outlet of the discharge pipeline 32, and the fourth regulating valve 22 5 disconnects the second end of the fourth connecting pipeline 223 from the outlet of the return pipeline 33, the first regulating valve 214 disconnects the second end of the first connecting pipeline 212 from the second end of the third pipeline 15, and the third regulating valve 224 disconnects the second end of the third connecting pipeline 222 from the second end of the fifth pipeline 18. At this time, the coolant in the second temperature regulating member exchanges heat with the heating device in the electric energy conversion device 20 and flows into the discharge pipeline 32, and enters the second connecting pipeline 213 through the discharge pipeline 32 for heat exchange and cooling. The medium flows into the return pipe 33, and then flows into the first temperature regulating member in the return pipe 33 for heat exchange, and this reciprocating process is repeated to achieve cooling of the electric energy conversion device 20. At this time, the medium discharged from the first pipe 12 passes through the fourth valve port s4 and the second valve port s2 in turn to enter the second pipe 14, and is compressed and refrigerated in the second pipe 14 by the compressor 141, and then passes through the first valve port s1 and the third valve port s3 in turn to enter the third pipe 15, and passes through the first radiator 11 in the third pipe 15 for heat exchange and cooling. It enters the fourth pipeline 17 through the third interface z3 and the first interface z1 in turn, passes through the throttling action of the throttling mechanism 173 in the fourth pipeline 17, and enters the fifth pipeline 18 through the second interface z2 and the fourth interface z4 in turn. In the fifth pipeline 18, it passes through the first temperature regulating component, so that the first temperature regulating component exchanges heat with the battery module 30 to achieve cooling of the battery module 30. The medium in the first temperature regulating component exchanges heat with the battery module 30 and then flows back to the first pipeline 12 after being heated up, and repeats this process.

[0113] like Fig. 9As shown, when the battery module 30 is charged and discharged, the electric energy conversion device 20 needs to be cooled and heat exchanged, and the first heat exchange circuit 1 performs compression refrigeration to cool the battery module 30, and when the heat storage of the first energy storage component 21 reaches the limit, at this time, the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the first interface z1 is connected to the third interface z3, the second interface z2 is connected to the fourth interface z4, and the second regulating valve 215 disconnects the second end of the second connecting pipeline 213 from the discharge pipeline 32. At the outlet, the fourth regulating valve 225 conducts the second end of the fourth connecting pipeline 223 and the outlet of the return pipeline 33, the first regulating valve 214 disconnects the second end of the first connecting pipeline 212 and the second end of the third pipeline 15, and the third regulating valve 224 disconnects the second end of the third connecting pipeline 222 and the second end of the fifth pipeline 18. At this time, the coolant in the second temperature regulating member exchanges heat with the heating device in the electric energy conversion device 20 and flows into the discharge pipeline 32, and enters the second radiator 31 through the discharge pipeline 32 for heat exchange and cooling. The medium discharged from the first pipeline 12 passes through the fourth valve port s4 and the second valve port s2 in turn into the second pipeline 14, is compressed and refrigerated by the compressor 141 in the second pipeline 14, and then passes through the first valve port s1 and the third valve port s3 in turn into the third pipeline 15, and passes through the first radiator in the third pipeline 15. After heat exchange and cooling, the medium in the first temperature regulating member exchanges heat with the battery module 30 and then flows back to the first pipeline 12. The above arrangement enables the second energy storage component 22 to transfer the stored cold energy to the electric energy conversion device 20 through the second heat exchange loop 3, thereby assisting the second heat exchange loop 3 in cooling the electric energy conversion device 20.

[0114] like Fig.10As shown, when the battery module 30 is charged and discharged, the electric energy conversion device 20 is cooled and heat-exchanged through the second heat exchange circuit 3, and the battery module 30 is cooled by opening the compression refrigeration mode through the first heat exchange circuit 1, and the heat stored in the first energy storage component 21 reaches the limit, and the cold stored in the second energy storage component 22 reaches the limit, at this time, the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the first interface z1 is connected to the third interface z3, the second interface z2 is connected to the fourth interface z4, and the second regulating valve 21 5 disconnects the second end of the second communication pipeline 213 from the outlet of the discharge pipeline 32, the fourth regulating valve 225 disconnects the second end of the fourth communication pipeline 223 from the outlet of the return pipeline 33, the first regulating valve 214 disconnects the second end of the first communication pipeline 212 from the second end of the third pipeline 15, and the third regulating valve 224 disconnects the second end of the third communication pipeline 222 from the second end of the fifth pipeline 18. At this time, the coolant in the second temperature regulating member exchanges heat with the heating element in the electric energy conversion device 20 and flows into the discharge pipeline 32, and passes through the discharge pipe 32. The outlet pipe 32 enters the second radiator 31 for heat exchange and cooling and flows into the return pipe 33, and then flows into the first temperature adjustment member in the return pipe 33 for heat exchange, and this reciprocating process is repeated to achieve cooling of the electric energy conversion device 20. At this time, the medium discharged from the first pipe 12 passes through the fourth valve port s4 and the second valve port s2 in turn to enter the second pipe 14, and after being compressed and cooled by the compressor 141 in the second pipe 14, it passes through the first valve port s1 and the third valve port s3 in turn to enter the third pipe 15, and passes through the first valve port s4 and the second valve port s2 in the third pipe 15. After the radiator 11 performs heat exchange and cooling, it sequentially passes through the third interface z3 and the first interface z1 to enter the fourth pipeline 17, and then passes through the throttling effect of the throttling mechanism 173 in the fourth pipeline 17, and then passes through the second interface z2 and the fourth interface z4 to enter the fifth pipeline 18, and passes through the first temperature regulating member in the fifth pipeline 18, so that the first temperature regulating member exchanges heat with the battery module 30 to achieve cooling of the battery module 30, and the medium in the first temperature regulating member exchanges heat with the battery module 30 and heats up, and then flows back to the first pipeline 12, and so on. The above arrangement enables the battery module 30 to be cooled only through the first heat exchange loop 1, and the electric energy conversion device 20 to be cooled only through the second heat exchange loop 3, and the first energy storage component 21 and the second energy storage component 22 are both disconnected from the first heat exchange loop 1 and the second heat exchange loop 3.

[0115] like Fig.11As shown, when the battery module 30 is charged and discharged, the electric energy conversion device 20 is cooled and heat-exchanged through the second heat exchange circuit 3, and the battery module 30 is cooled by opening the compression cooling mode through the first heat exchange circuit 1, and when the electric energy conversion device 20 needs to be further cooled, the second energy storage component 22 acts as a heat exchanger. At this time, the first valve port s1 is connected to the third valve port s3, the second valve port s2 is connected to the fourth valve port s4, the first interface z1 is connected to the third interface z3, the second interface z2 is connected to the fourth interface z4, and the second regulating valve 215 disconnects the second end of the second connecting pipeline 213 from the discharge pipeline 32. At the outlet, the fourth regulating valve 225 connects the second end of the fourth connecting pipeline 223 with the outlet of the return pipeline 33, the first regulating valve 214 disconnects the second end of the first connecting pipeline 212 and the second end of the third pipeline 15, and the third regulating valve 224 connects the second end of the third connecting pipeline 222 with the second end of the fifth pipeline 18, so that part of the cold energy generated by the first heat exchange circuit 1 cools the battery module 30, and part of it is transferred to the second energy storage component 22, so that the cold energy of the second energy storage component 22 assists the second heat exchange circuit 3 to perform heat exchange and cooling on the electric energy conversion device 20, thereby reducing the energy consumption of the second heat exchange circuit 3.

[0116] This embodiment further provides a thermal management method for an energy storage system, which is applied to the above energy storage system. The thermal management method for the energy storage system includes the following steps:

[0117] When the first heat exchange loop 1 starts the compression cooling mode, the energy storage module 2 can store the cold energy generated by the first heat exchange loop 1;

[0118] When the battery module 30 is charged and discharged, the heat generated by the battery module 30 can be stored in the energy storage module 2 through the first heat exchange loop 1;

[0119] When the battery module 30 needs to be cooled, the cold energy stored in the energy storage module 2 can be transferred to the battery module 30;

[0120] When the battery module 30 needs to be heated, the heat stored in the energy storage module 2 can be transferred to the battery module 30 .

[0121] The thermal management method for the energy storage system provided in this embodiment improves the temperature regulation effect of the battery module 30, and can fully utilize energy, thereby reducing the cost of thermal management of the energy storage system.

[0122] Specifically, in this embodiment, when the temperature of the electric energy conversion device 20 and the battery module 30 does not need to be adjusted, and when the first heat exchange circuit 1 starts the compression cooling mode, the second energy storage component 22 in the energy storage module 2 stores the cold energy generated by the first heat exchange circuit 1.

[0123] Embodiment 3

[0124] The thermal management system of the energy storage system provided in this embodiment is basically the same as that of the second embodiment. The difference between the thermal management system of the energy storage system provided in this embodiment and that of the second embodiment is that:

[0125] In this embodiment, if Fig.12 and Fig.13 As shown, based on the second embodiment, the first energy storage component 21 can also store the cold energy generated by the first heat exchange circuit 1, and the first energy storage component 21 can also transfer the stored cold energy to the electric energy conversion device 20 through the second heat exchange circuit 3.

[0126] Specifically, in this embodiment, if Fig.12 and Fig.13 As shown, the energy storage module 2 further includes a first transmission pipeline 23, a fifth regulating valve 24, a sixth regulating valve 25, a seventh regulating valve 26 and a second transmission pipeline 27, wherein the first end of the first transmission pipeline 23 is connected to the first end of the first communication pipeline 212 through the fifth regulating valve 24, the second end of the first transmission pipeline 23 is connected to the first end of the third communication pipeline 222 through the sixth regulating valve 25, the first end of the second transmission pipeline 27 is connected to the first communication pipeline 212 through the seventh regulating valve 26, and the second end of the second transmission pipeline 27 is connected to the first heat exchange circuit 1. When the first energy storage component 21 and the second energy storage component 22 both store the cold energy generated by the first heat exchange circuit 1, the third communication pipeline 222, the first transmission pipeline 23, the first communication pipeline 212 and the second transmission pipeline 27 are connected in sequence. Specifically, in this embodiment, the second end of the second transmission pipeline 27 is connected to the first pipeline 12. Optionally, in this embodiment, the fifth regulating valve 24, the sixth regulating valve 25 and the seventh regulating valve 26 can all be three-way valves.

[0127] The above arrangement can connect the first energy storage component 21 and the second energy storage component 22 together. Fig.12 As shown, when heat storage is not required and the first heat exchange circuit 1 performs compression refrigeration, the first energy storage component 21 and the second energy storage component 22 can both store the cold energy generated by the first heat exchange circuit 1, thereby increasing the cold energy stored. Fig.13 As shown, when the electric energy conversion device 20 needs to be cooled, the cold energy stored in the first energy storage component 21 and the second energy storage component 22 can be transferred to the electric energy conversion device 20 through the second heat exchange circuit 3, thereby achieving the cooling and heat dissipation effect of the electric energy conversion device 20.

[0128] Obviously, the above-mentioned embodiments of the embodiments of this specification are merely examples for clearly explaining the embodiments of this specification, and are not intended to limit the implementation methods of the embodiments of this specification. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments of this specification shall be included in the scope of protection of the claims of the embodiments of this specification.

Claims

1. A thermal management system for an energy storage system, characterized in that: include: A first heat exchange circuit (1), wherein the first heat exchange circuit (1) is capable of exchanging heat with the battery module (30) to adjust the temperature of the battery module (30); as well as An energy storage module (2), the energy storage module (2) being capable of being connected to the first heat exchange circuit (1) to store heat or cold in the first heat exchange circuit (1), and the energy storage module (2) being capable of transferring the stored heat or cold to the battery module (30).

2. The thermal management system of the energy storage system according to claim 1, characterized in that: The energy storage module (2) comprises a first energy storage component (21), the first energy storage component (21) comprising a first energy storage member (211), a first connecting pipeline (212) and a first regulating valve (214), the first energy storage member (211) being filled with energy storage material, the first connecting pipeline (212) penetrating the energy storage material of the first energy storage member (211), a first end of the first connecting pipeline (212) being connected to the first heat exchange circuit (1), a second end of the first connecting pipeline (212) being connected to a first connecting valve port of the first regulating valve (214), and a second connecting valve port and a third connecting valve port of the first regulating valve (214) being connected to the first heat exchange circuit (1); and / or The energy storage module (2) comprises a second energy storage component (22), the second energy storage component (22) comprising a second energy storage member (221), a third connecting pipeline (222) and a third regulating valve (224), the interior of the second energy storage member (221) is filled with energy storage material, the third connecting pipeline (222) is arranged in the energy storage material of the second energy storage member (221), a first end of the third connecting pipeline (222) is connected to the first heat exchange circuit (1), a second end of the third connecting pipeline (222) is connected to a first connecting valve port of the third regulating valve (224), and the second connecting valve port and the third connecting valve port of the third regulating valve (224) are both connected and connected to the first heat exchange circuit (1).

3. The thermal management system of the energy storage system according to claim 2, characterized in that: The thermal management system of the energy storage system further comprises a second heat exchange circuit (3), wherein the second heat exchange circuit (3) is used to adjust the temperature of the electric energy conversion device (20); The first energy storage component (21) further comprises a second connecting pipeline (213) and a second regulating valve (215); the second connecting pipeline (213) is also arranged in the energy storage material of the first energy storage component (211); the first end of the second connecting pipeline (213) is connected to the second heat exchange circuit (3); the second end of the second connecting pipeline (213) is connected to the first connecting valve port of the second regulating valve (215); the second connecting valve port and the third connecting valve port of the second regulating valve (215) are both connected to the second heat exchange circuit (3); and / or The second energy storage component (22) further comprises a fourth connecting pipeline (223) and a fourth regulating valve (225); the fourth connecting pipeline (223) is also arranged in the energy storage material of the second energy storage component (221); the first end of the fourth connecting pipeline (223) is connected to the second heat exchange circuit (3); the second end of the fourth connecting pipeline (223) is connected to the first connecting valve port of the fourth regulating valve (225); the second connecting valve port and the third connecting valve port of the fourth regulating valve (225) are both connected to the second heat exchange circuit (3).

4. The thermal management system of the energy storage system according to claim 3, characterized in that: The first heat exchange circuit (1) is connected to a compressor (141), and the first connecting pipeline (212) and the compressor (141) can be connected in sequence.

5. The thermal management system of the energy storage system according to claim 3 or 4, characterized in that: The energy storage module (2) further comprises a first transmission pipeline (23), a fifth regulating valve (24), a sixth regulating valve (25), a seventh regulating valve (26) and a second transmission pipeline (27); a first end of the first transmission pipeline (23) is connected to a first end of the first connecting pipeline (212) via the fifth regulating valve (24); a second end of the first transmission pipeline (23) is connected to a first end of the third connecting pipeline (222) via the sixth regulating valve (25); a first end of the second transmission pipeline (27) is connected to the first connecting pipeline (212) via the seventh regulating valve (26); and a second end of the second transmission pipeline (27) is connected to the first heat exchange circuit (1); When the first energy storage component (21) and the second energy storage component (22) both store the cold energy generated by the first heat exchange circuit (1), the third connecting pipeline (222), the first transmission pipeline (23), the first connecting pipeline (212), and the second transmission pipeline (27) are connected in sequence.

6. The thermal management system of the energy storage system according to claim 1, characterized in that: The thermal management system of the energy storage system further comprises a shunt module (4), wherein the shunt module (4) is preset with a cold storage mode, a cold release mode, a heat storage mode and a heat release mode; When the flow diversion module (4) is in the cold storage mode, the flow diversion module (4) stores the cold energy generated by the first heat exchange circuit (1) in the energy storage module (2); When the shunt module (4) is in the cooling mode, the shunt module (4) transfers the cooling energy stored in the energy storage module (2) to the battery module (30); When the shunt module (4) is in the heat storage mode, the shunt module (4) stores the heat released by the battery module (30) in the energy storage module (2) through the first heat exchange circuit (1); When the flow diversion module (4) is in the heat release mode, the flow diversion module (4) transfers the heat stored in the energy storage module (2) to the battery module (30) via the first heat exchange circuit (1).

7. The thermal management system of the energy storage system according to claim 6, characterized in that: The first heat exchange circuit (1) is connected to a first radiator (11), and a first cooling fan (110) is arranged opposite to the first radiator (11); The thermal management system of the energy storage system further comprises a first heat dissipation chamber (111), the first heat dissipation chamber (111) being provided with a first ventilation member capable of communicating with the outside, and the first heat dissipation chamber (111) containing the first radiator (11) and the first heat dissipation fan (110).

8. The thermal management system of the energy storage system according to claim 7, characterized in that: The first heat exchange circuit (1) comprises: a first temperature regulating member, the first temperature regulating member being used for exchanging heat for the battery module (30); A first pipeline (12), wherein a first end of the first pipeline (12) is in communication with the first temperature regulating member; a first valve group (13), wherein the first valve group (13) comprises a first valve port (s1), a second valve port (s2), a third valve port (s3) and a fourth valve port (s4); when the first valve port (s1) is connected to the fourth valve port (s4), the second valve port (s2) is connected to the third valve port (s3); and when the first valve port (s1) is connected to the third valve port (s3), the second valve port (s2) is connected to the fourth valve port (s4); and a second end of the first pipeline (12) is connected to the fourth valve port (s4); a second pipeline (14), wherein a first end of the second pipeline (14) is in communication with the second valve port (s2), a second end of the second pipeline (14) is in communication with the first valve port (s1), and the second pipeline (14) is in communication with a compressor (141); a third pipeline (15), a first end of the third pipeline (15) being in communication with the third valve port (s3), and the third pipeline (15) being in communication with the first radiator (11); a second valve group (16), the second valve group (16) having a first interface (z1), a second interface (z2), a third interface (z3) and a fourth interface (z4); when the first interface (z1) is connected to the fourth interface (z4), the second interface (z2) is connected to the third interface (z3); when the first interface (z1) is connected to the third interface (z3), the second interface (z2) is connected to the fourth interface (z4); the second end of the third pipeline (15) is in communication with the third interface (z3); a fourth pipeline (17), wherein a first end of the fourth pipeline (17) is in communication with the second interface (z2), a second end of the fourth pipeline (17) is in communication with the first interface (z1), and a throttling mechanism (173) is in communication with the fourth pipeline (17); A fifth pipeline (18), wherein a first end of the fifth pipeline (18) is connected to the fourth interface (z4), and a second end of the fifth pipeline (18) is connected to the first temperature regulating member.

9. The thermal management system of the energy storage system according to claim 8, characterized in that: The diversion module (4) comprises: a first three-way valve (41) disposed on the third pipeline (15), wherein a first connecting valve port of the first three-way valve (41) is in communication with a first end of the first radiator (11), a second connecting valve port of the first three-way valve (41) is in communication with the third interface (z3), and a third connecting valve port of the first three-way valve (41) is in communication with a first end of the energy storage module (2); a second three-way valve (42), wherein a first connecting valve port of the second three-way valve (42) is in communication with a second end of the first radiator (11), and a second connecting valve port of the second three-way valve (42) is in communication with a second end of the energy storage module (2); a third three-way valve (44), arranged on the fifth pipeline (18), wherein a first connecting valve port of the third three-way valve (44) is connected to the fourth interface (z4), and a second connecting valve port of the third three-way valve (44) is connected to the fifth pipeline (18); a first branch pipe (43), wherein a first end of the first branch pipe (43) is in communication with a third connecting valve port of the third three-way valve (44), and a second end of the first branch pipe (43) is in communication with a first end of the energy storage module (2); a second branch pipe (45), wherein a first end of the second branch pipe (45) is connected to the first pipeline (12), and a second end of the second branch pipe (45) is communicated with a third connecting valve port of the second three-way valve (42); a fourth three-way valve (47), arranged on the first pipeline (12), wherein a first connecting valve port of the fourth three-way valve (47) is connected to the fourth interface (z4), and a second connecting valve port of the fourth three-way valve (47) is connected to the first pipeline (12); and A third branch pipe (46), wherein a first end of the third branch pipe (46) is connected to a first end of the third pipeline (15), a second end of the third branch pipe (46) is connected to a third connecting valve port of the fourth three-way valve (47), and a fluorine pump (461) is provided on the third branch pipe (46).

10. An energy storage system, characterized in that: A thermal management system for an energy storage system comprising a battery module (30) and any one of claims 1 to 9, wherein the first heat exchange circuit (1) is used to adjust the temperature of the battery module (30).

11. A thermal management method for an energy storage system, characterized in that: Applied to the energy storage system of claim 10, the thermal management method of the energy storage system comprises the following steps: When the first heat exchange circuit (1) starts the compression refrigeration mode, the energy storage module (2) can store the cold energy generated by the first heat exchange circuit (1); When the battery module (30) is charged and discharged, the heat generated by the battery module (30) can be stored in the energy storage module (2) through the first heat exchange circuit (1); When the battery module (30) needs to be cooled, the cold energy stored in the energy storage module (2) can be transferred to the battery module (30); When the battery module (30) needs to be heated, the heat stored in the energy storage module (2) can be transferred to the battery module (30).

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