Energy storage high-voltage box and energy storage system

Abstract

The utility model discloses an energy storage high-voltage tank and an energy storage system, and the energy storage high-voltage tank comprises a tank body, the front wall of which is provided with a liquid inlet joint and a liquid return joint, and the liquid inlet joint and the liquid return joint are respectively and correspondingly connected with a liquid outlet interface and a liquid return interface of a liquid cooling unit; the fin radiator is arranged in the box body, the liquid inlet end of the fin radiator is connected with the liquid inlet connector, and the liquid outlet end of the fin radiator is connected with the liquid return connector; the fan is arranged in the box body, and an air blowing opening of the fan faces the fin radiator. The energy storage high-voltage box has an excellent heat dissipation effect, and can ensure that devices in the energy storage high-voltage box operate in a proper temperature environment, thereby improving the safety and reliability of the operation of the energy storage high-voltage box.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for energy storage systems, and more specifically, to an energy storage high-voltage box. Furthermore, this utility model also relates to an energy storage system including the aforementioned energy storage high-voltage box. Background Technology

[0002] A high-voltage energy storage box is an electrical device that stores large amounts of electrical energy in the form of high voltage and releases it when needed.

[0003] Energy storage high-voltage boxes require a high level of protection to effectively prevent the entry of solid foreign objects and dust, and to be able to withstand short-term immersion in water without damage, so as to be suitable for various harsh environments and ensure that the equipment can still operate normally under extreme conditions such as humidity and salt spray.

[0004] However, under higher protection levels, due to the excellent sealing, heat can easily accumulate inside the enclosure, leading to temperature increases that affect the performance and lifespan of electrical components. To address this issue, fans are typically used to circulate air and dissipate heat. However, this method is ineffective, especially in high outdoor temperatures, which can cause overheating and malfunctions of components within the energy storage high-voltage enclosure, preventing its safe and normal operation.

[0005] In summary, how to solve the problem of poor heat dissipation in existing high-voltage energy storage boxes, which leads to low operational safety and reliability, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an energy storage high-voltage box with excellent heat dissipation effect, which can ensure that the components inside the energy storage high-voltage box operate in a suitable temperature environment, thereby improving the safety and reliability of the energy storage high-voltage box operation.

[0007] Another objective of this invention is to provide an energy storage system including the aforementioned high-voltage energy storage box.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A high-voltage energy storage box, comprising:

[0010] The housing has a liquid inlet connector and a liquid return connector on its front wall, which are used to connect to the liquid outlet interface and the liquid return interface of the liquid chiller, respectively.

[0011] A finned radiator is installed inside the housing, with the liquid inlet end of the finned radiator connected to the liquid inlet connector and the liquid outlet end connected to the liquid return connector;

[0012] A fan is located inside the housing with its air outlet facing the finned heat sink.

[0013] Preferably, the finned heat sink includes a fin assembly, which is disposed between the air outlet of the fan and the main heat-generating device inside the housing.

[0014] Preferably, the fan's air outlet faces the fin assembly, and the air inlet faces other heat-generating devices.

[0015] Preferably, the finned radiator further includes a heat dissipation tube, the two ends of which are closely attached to the inner sidewall of the housing and respectively connected to the liquid inlet connector and the liquid return connector, and the fin assembly is disposed on the outer wall of the middle part of the heat dissipation tube.

[0016] Preferably, the liquid inlet connector and the liquid return connector are arranged vertically on one side of the front wall of the housing, and are connected to the two ends of the parallel heat dissipation pipe. The middle part of the heat dissipation pipe is inserted in a U-shape into the gap between the air outlet of the fan and the main heat-generating device inside the housing.

[0017] Preferably, the fin assembly includes multiple sets of fins, which are evenly arranged along the middle length of the heat dissipation tube, and each set of fins includes multiple fins, which are evenly arranged around the outer wall of the middle part of the heat dissipation tube.

[0018] Preferably, it also includes a main controller and a temperature detector, both located inside the enclosure, with the main controller signal-connected to the temperature detector and the fan.

[0019] An energy storage system includes several battery boxes, a liquid cooling unit, and a high-voltage energy storage box as described in any one of the above.

[0020] Preferably, it also includes a battery rack, with a plurality of battery boxes arranged in layers from top to bottom on the battery rack, and the energy storage high-voltage box located at the bottom of the battery rack. The liquid outlet and return interface of the liquid cooler unit are respectively connected to the liquid inlet main pipeline and the liquid return main pipeline, both of which extend from the first layer of battery boxes to the energy storage high-voltage box.

[0021] The main inlet pipe branches into several inlet branch pipes, which are connected to the inlets of several battery boxes and the inlet connectors of the energy storage high-voltage box, and each inlet branch pipe is equipped with an inlet control valve.

[0022] The main return liquid pipeline branches into several return liquid branch pipes, which are correspondingly connected to the return liquid ports of several battery boxes and the return liquid connectors of the energy storage high-voltage box.

[0023] Preferably, the liquid inlet main pipeline and the liquid return main pipeline are symmetrically arranged on the battery rack and located on both sides of the front wall of the housing.

[0024] The energy storage high-pressure box provided by this utility model has a finned heat exchanger and a fan inside. The liquid outlet of the liquid cooler, the liquid inlet of the box, the liquid inlet of the finned heat exchanger, the liquid outlet of the finned heat exchanger, the liquid return of the box, and the liquid return of the liquid cooler can be connected in sequence to form a liquid cooling circulation loop. In this way, when the energy storage high-pressure box needs to dissipate heat, the liquid cooler in the energy storage system can continuously supply coolant to the finned heat exchanger through the liquid cooling circulation loop. At the same time, the fan rotates to enhance the flow of hot air inside the box, blowing the hot air to the finned heat exchanger for heat exchange. The coolant in the finned heat exchanger carries away the heat of the hot air, thus achieving the purpose of effective cooling.

[0025] Therefore, this application combines water cooling technology and fan technology to improve the heat dissipation effect of the energy storage high-voltage box, so as to ensure that the components inside the energy storage high-voltage box operate in a suitable temperature environment. On the one hand, it can improve the service life of the components, and on the other hand, it can avoid the phenomenon of overheating failure of the components, thereby improving the safety and reliability of the operation of the energy storage high-voltage box. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 A partial side view of an energy storage high-voltage box provided by this utility model;

[0028] Figure 2 A partial top view of an energy storage high-voltage box provided by this utility model;

[0029] Figure 3 This is a schematic diagram of an energy storage system provided by the present invention.

[0030] Figure label:

[0031] 01-Battery box; 02-Energy storage high-voltage box; 03-Battery rack;

[0032] 1-Box housing; 2-Inlet connector; 3-Return connector; 4-Finned radiator; 41-Heat pipe; 42-Fin; 5-Fan; 6-Main controller; 7-Inlet main line; 8-Return main line; 9-Inlet branch pipe; 10-Inlet control valve; 11-Return branch pipe; 12-Fixing plate; 13-24V switching power supply; 14-Pre-charge resistor; 15-Pre-charge contactor; 16-Fuse; 17-Shunt unit; 18-Circuit breaker; 19-Positive contactor; 20-Negative contactor; 21-Power connector; 22-Communication connector; 23-Indicator light; 24-Push-button switch; 25-Folding handle; A-Air circulation direction. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] The core of this utility model is to provide an energy storage high-voltage box, which has excellent heat dissipation effect and can ensure that the components inside the energy storage high-voltage box operate in a suitable temperature environment, thereby improving the safety and reliability of the energy storage high-voltage box operation.

[0035] Another core aspect of this invention is to provide an energy storage system that includes the aforementioned high-voltage energy storage box.

[0036] It should be noted that in this embodiment, the orientation or positional relationship indicated by "up", "down", "front", "back", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this application.

[0037] Please refer to Figure 1 This application provides an energy storage high-pressure box, including a box body 1, a finned heat sink 4, and a fan 5. The front wall of the box body 1 is provided with a liquid inlet connector 2 and a liquid return connector 3, which are used to connect to the liquid outlet interface and the liquid return interface of the liquid cooling unit, respectively. The finned heat sink 4 is located inside the box body 1, with the liquid inlet end of the finned heat sink 4 connected to the liquid inlet connector 2 and the liquid outlet end connected to the liquid return connector 3. The fan 5 is located inside the box body 1 and its air outlet faces the finned heat sink 4.

[0038] It should be noted that the high-voltage storage box is a core component of the energy storage system, enabling functions such as charging and discharging control, protection, and monitoring. For example... Figure 2As shown, the energy storage high-voltage box typically contains a 24V switching power supply 13, a pre-charging resistor 14, a pre-charging contactor 15, a main controller 6, a positive contactor 19, a negative contactor 20, a fuse 16, a shunt 17, a circuit breaker 18, and other devices. When the energy storage high-voltage box is running, each device will generate heat, and the temperature inside the box 1 will rise. If heat cannot be effectively dissipated, the performance of the devices will degrade, and in severe cases, malfunctions may occur, or even safety accidents may result.

[0039] The finned radiator 4 includes a heat dissipation pipe 41 and a fin assembly disposed on the heat dissipation pipe 41. The heat dissipation pipe 41 is used to circulate coolant and exchange heat with the surrounding air to reduce the ambient temperature. The fin assembly is used to expand the heat dissipation area of ​​the heat dissipation pipe 41 to improve the heat exchange efficiency between the heat dissipation pipe 41 and the surrounding environment, so that the cooling capacity of the coolant can be quickly dissipated into the surrounding environment.

[0040] In this embodiment, the finned radiator 4 is installed inside the housing 1. An inlet connector 2 and a return connector 3 are installed on the front wall of the housing 1. One end of the inlet connector 2 is connected to the outlet port of the liquid cooling unit via the main inlet pipeline 7, and the other end is connected to the first port of the heat dissipation pipe 41 (i.e., the inlet end of the finned radiator 4). The second port of the heat dissipation pipe 41 is connected to one end of the return connector 3, and the other end of the return connector 3 is connected to the return port of the liquid cooling unit via the main return pipeline 8, thus forming a liquid cooling circulation loop. Therefore, when the liquid cooling unit is turned on, it can circulate coolant to the heat dissipation pipe 41 of the finned radiator 4. The coolant in the heat dissipation pipe 41 exchanges heat with the hot air inside the housing 1, thereby reducing the internal temperature of the housing 1.

[0041] Furthermore, fan 5 is installed inside the housing 1, and the air outlet of fan 5 is positioned facing the finned heat exchanger 4. Thus, when the finned heat exchanger 4 is cooling down, the rotation of fan 5 enhances the flow of hot air inside the housing 1, blowing the hot air to the finned heat exchanger 42 for heat exchange. This enhances the convective heat exchange between the hot air inside the housing 1 and the heat exchange pipe 41, thereby improving the heat dissipation effect of the energy storage high-voltage box and thus improving the safety and reliability of the energy storage high-voltage box operation.

[0042] Optionally, in this embodiment, both the liquid inlet connector 2 and the liquid return connector 3 are threadedly connected to the housing 1, and both are provided with sealing rings between themselves and the housing 1 to seal and protect the housing 1.

[0043] It should be noted that fuse 16 is the main heating element in the energy storage high-voltage box, and the heat it generates is much greater than that of other heating elements.

[0044] Based on the above embodiments, please refer to Figure 1 and Figure 2 The fin assembly is located between the air outlet of the fan 5 and the main heating element inside the housing 1.

[0045] Understandably, the finned assembly is a key component for heat dissipation in the finned radiator 4, increasing the heat dissipation area and allowing coolness to dissipate into the housing 1 more quickly. Therefore, placing the finned assembly between the air outlet of the fan 5 and the main heat-generating device (e.g., fuse 16) inside the housing 1 can quickly remove the heat generated by the main heat-generating device, effectively reducing the ambient temperature inside the energy storage high-voltage box, thus better ensuring that the devices inside the energy storage high-voltage box operate in a suitable temperature environment.

[0046] Based on the above embodiments, please refer to Figure 1 and Figure 2 The air outlet of fan 5 faces the fin assembly, and the air inlet faces other heat-generating devices.

[0047] Specifically, a fin assembly is provided on the front side of the air outlet of fan 5, and a predetermined distance is reserved between fan 5 and the fin assembly. A pre-charge contactor 15 and a pre-charge resistor 14 are arranged side-by-side on the rear side of the air inlet of fan 5, and a predetermined distance is reserved between fan 5 and the pre-charge contactor 15 and pre-charge resistor 14. In this way, the air blown by the air outlet of fan 5 diffuses outwards after passing through the fin assembly. The pre-charge contactor 15 or pre-charge resistor 14 can prevent some air from continuously diffusing backwards, facilitating the intake of air into the air inlet of fan 5. The air circulation direction A is as follows: Figure 2 As shown, this can further enhance air circulation, thereby more effectively reducing the ambient temperature inside the energy storage high-voltage box and improving the heat dissipation effect of the energy storage high-voltage box.

[0048] Based on the above embodiments, the two ends of the heat dissipation pipe 41 are closely attached to the inner side wall of the housing 1 and are respectively connected to the liquid inlet connector 2 and the liquid return connector 3, and the outer wall of the middle part of the heat dissipation pipe 41 is provided with a fin assembly.

[0049] Specifically, one end of the heat sink 41 is connected to the liquid inlet connector 2, and the other end is connected to the liquid return connector 3. Both ends of the heat sink 41 extend rearward and are mounted on the inner wall of the housing 1 via the fixing plate 12. The middle part of the heat sink 41 is located between the air outlet of the fan 5 and the main heat-generating device inside the housing 1 and is equipped with a fin assembly. Thus, most of the heat sink 41 is fitted against the inner wall of the housing 1, occupying less internal space and saving space within the housing 1, avoiding any impact on the arrangement of components and wiring within the housing 1.

[0050] Furthermore, based on the above embodiments, please refer to... Figure 1 and Figure 2 The liquid inlet connector 2 and the liquid return connector 3 are arranged vertically on one side of the front wall of the housing 1, and are connected to the two ends of the parallel heat dissipation pipe 41. The middle part of the heat dissipation pipe 41 is inserted in a U-shape into the gap between the air outlet of the fan 5 and the main heat-generating device inside the housing 1.

[0051] Specifically, the liquid inlet connector 2 and the liquid return connector 3 are arranged vertically and located on the left side of the front wall of the housing 1. Both ends of the heat dissipation pipe 41 are straight, and they are fixed vertically (i.e., side by side) to the inner left wall of the housing 1. The two ports at both ends of the heat dissipation pipe are connected to the liquid inlet connector 2 and the liquid return connector 3 respectively. The middle part of the heat dissipation pipe 41 is U-shaped, and the two sides of its open end are integrally connected to the two ends of the heat dissipation pipe 41. The middle part of the heat dissipation pipe 41 is located in the gap between the air outlet of the fan 5 and the main heat-generating device inside the housing 1. Thus, by adopting the above structure, the two ends of the heat dissipation pipe 41 can be fixed to the inner wall of the same side of the housing 1, which greatly saves the installation space inside the housing 1 and effectively avoids affecting the arrangement of various components and wiring inside the housing 1.

[0052] Based on the above embodiments, please refer to Figure 1 The fin assembly includes multiple sets of fins, which are evenly arranged along the middle length of the heat dissipation tube 41. Each set of fins includes multiple fins 42, which are evenly arranged around the outer wall of the middle part of the heat dissipation tube 41.

[0053] Therefore, by adopting the above structure, multiple fins 42 can be evenly arranged in the middle of the heat dissipation pipe 41. On the one hand, it can significantly increase the heat exchange area of ​​the heat dissipation pipe 41, so that the cooling capacity of the coolant can be dissipated to the surrounding environment more quickly, thereby improving the heat dissipation effect of the energy storage high-pressure box. On the other hand, under the same heat exchange effect, the middle structure of the heat dissipation pipe 41 can be made more compact and smaller in size, thereby further saving the installation space in the box 1.

[0054] Based on the above embodiments, this application also includes a main controller 6 and a temperature detector, both located inside the housing 1, with the main controller 6 signal-connected to the temperature detector and the fan 5.

[0055] Understandably, the temperature detector is installed inside the enclosure 1 to detect the ambient temperature inside the enclosure 1 in real time and transmit it to the main controller 6. After obtaining the real-time temperature value, the main controller 6 compares the real-time temperature value with the preset temperature threshold. If the real-time temperature value exceeds the preset temperature threshold, it means that the ambient temperature inside the enclosure 1 is too high and heat dissipation is required. The main controller 6 turns on the fan 5 and sends a heat dissipation signal to the control unit of the energy storage system. The liquid cooling unit is then turned on, thereby realizing automatic heat dissipation and cooling of the energy storage high-voltage box and ensuring that the components inside the energy storage high-voltage box operate in a suitable temperature environment.

[0056] Preferably, multiple temperature detectors are used, each corresponding to one of the multiple devices. Each temperature detector is positioned adjacent to its corresponding device, for example, on the metal support of the device. In this way, each device has a temperature detector to monitor its temperature in real time. If the temperature of any device exceeds its corresponding temperature threshold, a cooling operation is initiated to release cool air into the enclosure 1 to lower the temperature of the heat-generating device. This ensures that all devices within the energy storage high-voltage box operate in a suitable temperature environment, effectively extending the service life of each device.

[0057] This application also provides an energy storage system, including a plurality of battery boxes 01, a liquid cooling unit, and the energy storage high-voltage box 02 disclosed in the above embodiments.

[0058] More preferably, such as Figure 3 As shown, the energy storage system also includes a battery rack 03, with several battery boxes 01 arranged layer by layer on the battery rack 03 from top to bottom, and the energy storage high-voltage box 02 located at the bottom of the battery rack 03, so that the energy storage high-voltage box 02 and several battery boxes 01 are arranged in a row, which facilitates the subsequent liquid cooling unit to supply coolant to several battery boxes 01 and energy storage high-voltage box 02 together.

[0059] The specific configuration of the liquid cooling unit and multiple high-pressure energy storage boxes is as follows: Figure 3 As shown, the liquid cooler's outlet and return ports are connected to the main inlet pipe 7 and the main return pipe 8, respectively, both extending from the first-layer battery box 01 to the energy storage high-voltage box 02. The main inlet pipe 7 branches into several inlet branch pipes 9, corresponding to the inlets of several battery boxes 01 and the inlet connectors 2 of the energy storage high-voltage box 02, and each inlet branch pipe 9 is equipped with an inlet control valve 10. The main return pipe 8 branches into several return branch pipes 11, corresponding to the return ports of several battery boxes 01 and the return connectors 3 of the energy storage high-voltage box 02. Therefore, the liquid cooler, originally designed for the battery boxes, can be used to supply coolant to the energy storage high-voltage box. In other words, the liquid cooling pipes of the battery boxes are used to dissipate heat from the high-voltage box, reducing the number of liquid cooler units required and thus saving on the heat dissipation cost of the energy storage system.

[0060] Based on the above embodiments, please refer to Figure 3 The liquid inlet main line 7 and the liquid return main line 8 are symmetrically arranged on the battery rack 03 and located on both sides of the front wall of the box 1.

[0061] Understandably, the front wall of the enclosure 1 is typically equipped with panel devices such as a power connector 21, a communication connector 22, an indicator light 23, a push-button switch 24, and a folding handle 25. The liquid inlet main line 7 and the liquid return main line 8 are located on opposite sides of the front wall of the enclosure 1, which avoids interference with the panel devices and facilitates user operation. Furthermore, the symmetrical arrangement of the liquid inlet main line 7 and the liquid return main line 8 on the battery rack 03 ensures structural balance and improves the stability of the battery rack structure.

[0062] Based on the above embodiments, this application also includes a control unit, which is signal-connected to the liquid inlet control valve 10, the main controller in the battery box 01, and the main controller 6 in the energy storage high-voltage box 02.

[0063] The control unit is used to collect and process signals transmitted from multiple energy storage high-voltage boxes, and execute various operations controlling the battery box 01, energy storage high-voltage box 02, and liquid cooling unit based on the acquired signals. Specifically, the main controller 6 of each energy storage high-voltage box 02 acquires and processes the real-time temperature value from its respective temperature detector. If the real-time temperature value exceeds a preset temperature threshold, it sends a heat dissipation signal to the control unit, indicating that the energy storage high-voltage box 02 needs to be cooled. The control unit then opens the corresponding liquid inlet control valve 10 for that energy storage high-voltage box 02 to achieve coolant circulation and supply, thereby completing the heat dissipation operation of the energy storage high-voltage box 02. Similarly, the control unit can control the battery box to perform heat dissipation operations in the same way.

[0064] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] The above provides a detailed description of the energy storage high-voltage box and energy storage system provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A high-voltage energy storage box, characterized in that, include: The housing (1) has a liquid inlet connector (2) and a liquid return connector (3) on its front wall, which are used to connect the liquid outlet and liquid return interface of the liquid cooling unit respectively. A finned radiator (4) is installed inside the housing (1). The liquid inlet end of the finned radiator (4) is connected to the liquid inlet connector (2), and the liquid outlet end is connected to the liquid return connector (3). A fan (5) is located inside the housing (1) and its air outlet faces the finned heat sink (4).

2. The energy storage high-voltage box according to claim 1, characterized in that, The finned radiator (4) includes a finned assembly, which is located between the air outlet of the fan (5) and the main heat-generating device inside the housing (1).

3. The energy storage high-voltage box according to claim 2, characterized in that, The air outlet of the fan (5) faces the fin assembly, and the air inlet faces other heat-generating devices.

4. The energy storage high-voltage box according to claim 2, characterized in that, The finned radiator (4) also includes a heat dissipation tube (41). The two ends of the heat dissipation tube (41) are closely attached to the inner side wall of the housing (1) and are respectively connected to the liquid inlet connector (2) and the liquid return connector (3). The finned assembly is provided on the outer wall of the middle part of the heat dissipation tube (41).

5. The energy storage high-voltage box according to claim 4, characterized in that, The liquid inlet connector (2) and the liquid return connector (3) are arranged vertically on one side of the front wall of the box (1), and the two are connected to the two ends of the heat dissipation pipe (41) in parallel. The middle part of the heat dissipation pipe (41) is inserted in a U-shape into the gap between the air outlet of the fan (5) and the main heat-generating device in the box (1).

6. The energy storage high-voltage box according to claim 4, characterized in that, The fin assembly includes multiple sets of fins, which are evenly arranged along the middle length of the heat dissipation tube (41), and each set of fins includes multiple fins (42), which are evenly arranged around the outer wall of the middle part of the heat dissipation tube (41).

7. The energy storage high-voltage box according to any one of claims 1 to 6, characterized in that, It also includes a main controller (6) and a temperature detector, both located inside the enclosure (1), with the main controller (6) connected to the temperature detector and the fan (5).

8. An energy storage system, characterized in that, It includes several battery boxes (01), liquid cooling units and energy storage high-voltage boxes (02) as described in any one of claims 1 to 7.

9. The energy storage system according to claim 8, characterized in that, It also includes a battery rack (03), with several battery boxes (01) arranged layer by layer on the battery rack (03) from top to bottom, and the energy storage high-voltage box (02) is located at the bottom of the battery rack (03). The liquid outlet and return interface of the liquid cooler are respectively connected to the liquid inlet main pipeline (7) and the liquid return main pipeline (8), both of which extend from the first layer of battery boxes (01) to the energy storage high-voltage box (02). The main inlet pipeline (7) branches out into several inlet branch pipes (9) which are connected to the inlet ports of several battery boxes (01) and the inlet connectors (2) of the energy storage high voltage box (02), and each inlet branch pipe (9) is equipped with an inlet control valve (10). The main return pipeline (8) branches out into several return branch pipelines (11) which are connected to the return ports of several battery boxes (01) and the return connectors (3) of the energy storage high voltage box (02).

10. The energy storage system according to claim 9, characterized in that, The liquid inlet main line (7) and the liquid return main line (8) are symmetrically arranged on the battery rack (03) and located on both sides of the front wall of the housing (1).

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