Energy storage battery system

Abstract

The invention discloses an energy storage battery system. The energy storage battery system comprises a battery pack, a liquid cooling device and a leaked liquid collecting device, the battery pack comprises a first shell, a second shell and a battery module, the second shell is provided with a containing cavity, the first shell is arranged in the containing cavity, the first shell is provided with an inner cavity, the inner cavity is used for containing cooling liquid, the battery module is arranged in the inner cavity, and the containing cavity is used for collecting the cooling liquid leaked from the inner cavity; the liquid cooling device is used for conveying cooling liquid to the inner cavity. Therefore, the second shell is sleeved on the first shell, and when the cooling liquid leaks from the first shell, the accommodating cavity of the second shell can preliminarily store the leaked cooling liquid, so that the leaked cooling liquid is effectively prevented from flowing out of the energy storage battery system to pollute the surrounding environment.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an energy storage battery system. Background Art

[0002] In large-scale battery energy storage systems, battery modules generate a lot of heat during the charging and discharging process. Therefore, the energy storage system needs to adopt effective cooling technology to dissipate heat, so as to quickly transfer the heat generated by the battery to the cooling medium and control the temperature of the battery module through heat exchange.

[0003] At present, some battery energy storage systems use immersion liquid cooling to cool down. The immersion liquid cooling system directly immerses the battery module in the coolant, and then removes the heat through the circulating coolant. However, in this cooling method, the battery pack may leak coolant due to problems such as excessive internal pressure or improper sealing, thus affecting the normal use and safety performance of the battery energy storage system. Summary of the invention

[0004] In view of the above existing situation, the present invention provides an energy storage battery system, which can improve the problem of coolant leakage.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an energy storage battery system, which includes: a battery pack, including a first shell, a second shell and a battery module, the second shell is provided with a accommodating cavity, the first shell is arranged in the accommodating cavity, the first shell is provided with an inner cavity, the inner cavity is used to accommodate a coolant, the battery module is arranged in the inner cavity, the accommodating cavity is used to collect the coolant leaked from the inner cavity; a liquid cooling device, connected to the inner cavity and used to transport the coolant to the inner cavity.

[0006] Optionally, the energy storage battery system further includes a leakage collection device, which is respectively connected to the accommodating cavity and the liquid cooling device, and the leakage collection device can collect the cooling liquid in the accommodating cavity and can transport the cooling liquid to the liquid cooling device.

[0007] Optionally, the energy storage battery system includes a plurality of the battery packs, and the accommodating cavities of the plurality of the battery packs are all connected to the same leakage collection device.

[0008] Optionally, along the direction of gravity, the leakage collection device is located below the accommodating cavity, so that the cooling liquid in the accommodating cavity flows into the leakage collection device.

[0009] Optionally, the energy storage battery system further includes a first water pump, which connects the accommodating chamber and the leakage collection device, and is used to transport the cooling liquid in the accommodating chamber to the leakage collection device.

[0010] Optionally, the energy storage battery system also includes a solenoid valve and a liquid level detection device, wherein the solenoid valve is connected to the liquid outlet of the accommodating chamber, and the solenoid valve is used to open or close the liquid outlet; the liquid level detection device is disposed in the accommodating chamber, and the liquid level detection device is connected to the solenoid valve, and the liquid level detection device is used to detect that the coolant reaches a preset height, thereby triggering the solenoid valve to open or close the liquid outlet.

[0011] Optionally, the liquid level detection device includes a first liquid level sensor and a second liquid level sensor, and the second liquid level sensor is located below the first liquid level sensor along the gravity direction; the first liquid level sensor is used to detect that when the liquid level of the coolant reaches a first position, it triggers the solenoid valve to open the liquid outlet; the second liquid level sensor is used to detect that when the liquid level of the coolant reaches a second position, it triggers the solenoid valve to close the liquid outlet.

[0012] Optionally, the liquid level detection device includes a third liquid level sensor; when the third liquid level sensor detects that the coolant is at a first preset position, it triggers the solenoid valve to open the liquid outlet; when the third liquid level sensor detects that the coolant is at a second preset position, it triggers the solenoid valve to close the liquid outlet; the second preset position is located below the first preset position.

[0013] Optionally, the energy storage battery system further includes a second water pump, which connects the leakage collection device and the liquid cooling device, and is used to transport the coolant of the leakage recovery device to the liquid cooling device.

[0014] Optionally, the energy storage battery system also includes: a liquid cooling pipe, which is used to transport the coolant, and the liquid cooling pipe connects the accommodating cavity, the leakage collection device, the liquid cooling device and the inner cavity; and a magnetic suction component, which is installed in the liquid cooling pipe to absorb metal impurities in the coolant.

[0015] Optionally, the liquid cooling pipeline includes a first pipe section, the first pipe section connects the liquid cooling device and the inner cavity, and the magnetic attraction component is installed on the first pipe.

[0016] The energy storage battery system involved in the present invention includes a battery pack, a liquid cooling device and a leakage collection device, wherein the battery pack includes a first shell, a second shell and a battery module. The second shell is provided with a accommodating cavity, and the first shell is arranged in the accommodating cavity. The first shell is provided with an inner cavity, and the inner cavity is used to accommodate coolant. The battery module is arranged in the inner cavity, and the accommodating cavity is used to collect the coolant leaked from the inner cavity. In this way, the second shell is sleeved on the first shell. When the coolant leaks in the first shell, the accommodating cavity of the second shell can initially store the leaked coolant, thereby effectively preventing the leaked coolant from flowing outside the energy storage battery system and polluting the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0018] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0019] Figure 1 Schematic diagram showing the energy storage battery system involved in the present application.

[0020] Figure 2 It is a schematic diagram showing the partial structure of the energy storage battery system involved in the present application.

[0021] Figure 3 It is another partial structural schematic diagram showing the energy storage battery system involved in the present application.

[0022] Figure 4 It is another partial structural schematic diagram showing the energy storage battery system involved in the present application.

[0023] Figure 5 It is another partial structural schematic diagram showing the energy storage battery system involved in the present application.

[0024] Figure 6 It is another partial structural schematic diagram showing the energy storage battery system involved in the present application.

[0025] Figure numerals: 1. battery pack; 11. first shell; 111. inner cavity; 12. second shell; 121. accommodating cavity; 122. liquid outlet; 2. liquid cooling device; 3. liquid leakage collection device; 4. solenoid valve; 5. liquid level detection device; 51. first liquid level sensor; 52. second liquid level sensor; 6. second water pump; 7. liquid cooling pipe; 8. magnetic element; 81. first magnetic element; 82. second magnetic element; 9. battery management system. DETAILED DESCRIPTION

[0026] Hereinafter, with reference to the accompanying drawings, the preferred embodiments of the present application are described in detail. In the following description, the same symbols are given to the same components, and repeated descriptions are omitted. In addition, the accompanying drawings are only schematic diagrams, and the ratio of the sizes of the components to each other or the shapes of the components may be different from the actual ones. It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] Reference Figure 1 and Figure 2 The present application provides an energy storage battery system, which includes a battery pack 1, a liquid cooling device 2 and a leakage collection device 3. The battery pack 1 includes a first shell 11, a second shell 12 and a battery module. The second shell 12 is provided with a receiving cavity 121. The first shell 11 is arranged in the receiving cavity 121. The first shell 11 is provided with an inner cavity 111. The inner cavity 111 is used to receive a coolant. The battery module is arranged in the inner cavity 111. The receiving cavity 121 is used to collect the coolant leaked from the inner cavity 111. The liquid cooling device 2 is connected to the inner cavity 111 and is used to transport the coolant to the inner cavity 111.

[0029] According to the above structure, in the energy storage battery system of the present application, the second shell 12 of the battery pack 1 is sleeved on the first shell 11. When the first shell 11 leaks coolant, the accommodating cavity 121 of the second shell 12 can initially store the leaked coolant, thereby effectively preventing the leaked coolant from flowing out of the energy storage battery system and polluting the surrounding environment.

[0030] In some embodiments, the energy storage battery system further includes a leakage collection device 3, which is connected to the accommodating chamber 121 and the liquid cooling device 2 respectively. The leakage collection device 3 can collect the coolant in the accommodating chamber 121 and can transport the coolant to the liquid cooling device 2. Therefore, the setting of the leakage collection device 3 can also collect the coolant in the accommodating chamber 121, thereby avoiding excessive coolant in the accommodating chamber 121 and leakage again. The coolant collected by the leakage collection device 3 can be transported to the liquid cooling device 2 again, so that the leaked coolant re-enters the circulation of the energy storage battery system, reducing the waste of coolant.

[0031] It is understandable that the liquid cooling device 2 is provided with a water tank for storing coolant, and the water tank is connected to the inner cavity 111 of the first shell 11 through a liquid cooling pipe 7. In the related art, when the coolant in the inner cavity 111 leaks, the coolant in the inner cavity 111 continues to be less, and it is necessary to replenish the coolant in the water tank into the inner cavity 111 to avoid insufficient coolant in the inner cavity 111 and affect the heat exchange of the battery module. However, after the coolant leaks, the total amount of coolant in the energy storage battery system is reduced, and the staff is usually required to add coolant to the water tank to avoid affecting the normal use of the battery energy storage system. Therefore, the present application can recover the leaked liquid by setting a leakage collection device 3, and can also transport the leaked liquid to the liquid cooling device 2 again, so that the leaked coolant re-enters the circulation of the energy storage battery system, and also reduces the number of times the staff adds coolant, reducing the workload of the staff.

[0032] In some embodiments, the energy storage battery system includes multiple battery packs 1, and the accommodating cavities 121 of the multiple battery packs 1 are all connected to the same leakage collection device 3. In this way, one leakage collection device 3 can collect the coolant delivered from the accommodating cavities 121 of multiple battery packs 1 at the same time, and there is no need to independently set up a leakage collection device 3 for each battery pack 1, so that the connection structure can be reduced, the number of components can be reduced, and the complexity of the structure can be reduced, and the material cost and installation cost can be reduced. In addition, the maintenance cost can also be reduced, and the staff only needs to maintain one leakage collection device 3. Therefore, the design of connecting the accommodating cavities 121 of multiple battery packs 1 to the same leakage collection device 3 can not only improve the economy of the energy storage battery system, but also improve the management efficiency.

[0033] Of course, in some examples, the accommodating cavity 121 of each battery pack 1 may be connected to an independent leakage collection device 3 , thereby enabling the leakage of each battery pack 1 to be more intuitively monitored in the corresponding leakage collection device 3 .

[0034] Reference Figure 1 In some embodiments, the leakage collection device 3 is located below the accommodating chamber 121 along the direction of gravity, so that the coolant in the accommodating chamber 121 flows into the leakage collection device 3. Thus, gravity is used to allow the leaked coolant to flow naturally to the leakage collection device 3, without the need for additional power or pumping systems, and without the need to set up a complex conveying structure, thereby reducing the cost of use. And because the leakage collection device 3 is located below, the leaked coolant can be quickly collected, reducing the risk of coolant leaking to the external environment, and improving the safety performance of the energy storage battery system.

[0035] In some embodiments, the energy storage battery system further includes a first water pump, which connects the accommodating chamber 121 and the leakage collection device 3, and is used to transport the coolant in the accommodating chamber 121 to the leakage collection device 3. In this way, when the position of the leakage collection device 3 is higher than the accommodating chamber 121, the first water pump can transport the coolant to the accommodating chamber 121. According to this structure, the energy storage battery system can flexibly arrange the battery pack 1, the liquid cooling device 2 and the leakage collection device 3 according to actual conditions. Even without relying on gravity, the first water pump can ensure that the coolant in the inner cavity 111 of the battery pack 1 can effectively flow to the leakage collection device 3.

[0036] Reference Figure 3 In some embodiments, the energy storage battery system further includes an electromagnetic valve 4 and a liquid level detection device 5. The electromagnetic valve 4 is connected to the liquid outlet 122 of the accommodating chamber 121, and the electromagnetic valve 4 is used to open or close the liquid outlet 122. The liquid level detection device 5 is disposed in the accommodating chamber 121, and the liquid level detection device 5 is connected to the electromagnetic valve 4. The liquid level detection device 5 is used to detect that the coolant reaches a preset height, and trigger the electromagnetic valve 4 to open or close the liquid outlet 122. Specifically, the energy storage battery system includes a battery management system 9. When the liquid level detection device 5 detects that there is a lot of coolant in the accommodating chamber 121 and the liquid level has reached a preset height, the battery management system 9 will send a signal to the battery management system 9. After receiving the signal that the liquid level has reached the preset height, the battery management system 9 will control the electromagnetic valve 4 to open the liquid outlet 122, so that the coolant flows out of the accommodating chamber 121 and flows to the leakage collection device 3. When the coolant level in the accommodating chamber 121 drops to a safe position, the liquid level detection device 5 will send a signal to the battery management system 9. After receiving the signal, the battery management system 9 will control the solenoid valve 4 to close the liquid outlet 122.

[0037] Reference Figure 3In some embodiments, the liquid level detection device 5 includes a first liquid level sensor 51 and a second liquid level sensor 52. The second liquid level sensor 52 is located below the first liquid level sensor 51 along the gravity direction. The first liquid level sensor 51 is used to detect that when the liquid level of the coolant reaches the first position, the electromagnetic valve 4 is triggered to open the liquid outlet 122. The second liquid level sensor 52 is used to detect that when the liquid level of the coolant reaches the second position, the electromagnetic valve 4 is triggered to close the liquid outlet 122. Therefore, by using the first liquid level sensor 51 and the second liquid level sensor 52 in coordination, the flow of the coolant out of the accommodating chamber 121 can be accurately controlled. The first liquid level sensor 51 is used to prompt the valve to open, that is, when the coolant reaches the first position, it indicates that the coolant needs to be discharged, and the electromagnetic valve 4 opens the liquid outlet 122; the second liquid level sensor 52 is used to prompt the valve to close, that is, when the coolant reaches the second position, it indicates that the coolant in the accommodating chamber 121 has flowed out a sufficient amount or the coolant has completely flowed out, and the electromagnetic valve 4 closes the liquid outlet 122. Specifically, when the coolant in the inner cavity 111 leaks and leaks into the accommodating cavity 121, and the liquid level of the coolant rises to the first position, the first liquid level sensor 51 detects the change in liquid level and sends a signal to the battery management system 9. After receiving the signal from the first liquid level sensor 51, the battery management system 9 controls the solenoid valve 4 to open the liquid outlet 122 so that the coolant flows out of the accommodating cavity 121 and flows to the leakage collection device 3. When the coolant drops to the second position, the second liquid level sensor 52 detects the change in liquid level and sends a signal to the battery management system 9. After receiving the signal, the battery management system 9 controls the solenoid valve 4 to close the liquid outlet 122.

[0038] In other embodiments, the liquid level detection device 5 includes a third liquid level sensor; when the third liquid level sensor detects that the coolant is at the first preset position, the solenoid valve 4 is triggered to open the liquid outlet 122; when the third liquid level sensor detects that the coolant is at the second preset position, the solenoid valve 4 is triggered to close the liquid outlet 122; the second preset position is located below the first preset position. Thus, the energy storage battery system can be provided with only one third liquid level sensor, and the third liquid level sensor is used to detect that the liquid level of the coolant is at the first preset position or the second preset position to trigger the solenoid valve 4 to open or close the liquid outlet 122. Specifically, when the coolant is below the first preset position, the third liquid level sensor does not detect that the coolant has reached the first preset position, and the solenoid valve 4 is in a closed state. When the coolant in the inner cavity 111 leaks and the coolant leaks to the accommodating cavity 121, when the liquid level of the coolant rises to the first preset position, the third liquid level sensor detects the liquid level change and sends a valve opening signal to the battery management system 9. After receiving the signal from the third liquid level sensor, the battery management system 9 controls the solenoid valve 4 to open the liquid outlet 122. The coolant flows from the liquid outlet 122 to the leakage collection device 3, and the liquid level in the accommodating chamber 121 begins to drop. After the coolant flows out for a period of time, the liquid level drops to the second preset position, and the third liquid level sensor detects the liquid level change again. According to the preset logic, the third liquid level sensor sends a valve closing signal to the battery management system 9. After receiving the signal from the third liquid level sensor, the battery management system 9 controls the solenoid valve 4 to close the liquid outlet 122.

[0039] Reference Figure 1In some embodiments, the energy storage battery system further includes a second water pump 6, which is connected to the leakage collection device 3 and the liquid cooling device 2, and is used to transport the coolant of the leakage recovery device to the liquid cooling device 2. Therefore, in order to avoid excessive coolant or even overflow of the leakage collection device 3, the second water pump 6 can start working when the coolant level of the leakage collection device 3 reaches a preset height, and transport the coolant to the water tank of the liquid cooling device 2, so that the leaked coolant can re-enter the circulation of the energy storage battery system. Specifically, the second water pump 6 can have a float switch, and the float switch has the characteristic of being able to rise with the rise of the water level when working. The float switch can detect the change of the water level and control the start and stop of the second water pump 6 accordingly. As the coolant level in the leakage recovery device rises, the float will also rise. When the water level reaches the preset high water level, the float triggers the switch and sends a signal to the motor control system of the second water pump 6, so that the motor of the second water pump 6 starts to work to transport the coolant in the leakage recovery device to the water tank of the liquid cooling device 2. When the coolant level drops to the preset low water level, the float drops and triggers the switch, thereby turning off the motor of the second water pump 6 and stopping the delivery of the coolant. As a result, the second water pump 6 can avoid running when there is no coolant or the coolant level is low, without causing damage or wasting electricity, and is energy-saving and efficient.

[0040] In other embodiments, the energy storage battery system may not need to be provided with the second water pump 6. Then, along the gravity direction, the leakage collection tank is set at a position higher than the water tank of the liquid cooling device 2, so that the coolant in the leakage collection device 3 flows into the water tank of the liquid cooling device 2. In this way, gravity is used to allow the coolant to flow naturally to the leakage collection device 3, without the need for additional power or pumping systems, without the need to set up a complex conveying structure, and also reducing the cost of use. And because the water tank of the liquid cooling device 2 is located below, the leaked coolant can be quickly collected, reducing the risk of coolant leaking to the external environment, and improving the safety performance of the energy storage battery system.

[0041] Reference Figure 4 In some embodiments, the energy storage battery system further includes a liquid cooling pipe 7 for conveying coolant, the liquid cooling pipe 7 connects the accommodating chamber 121, the leakage collecting device 3, the liquid cooling device 2 and the inner chamber 111; a magnetic suction member 8, the magnetic suction member 8 is installed in the liquid cooling pipe 7 to absorb metal impurities in the coolant. Therefore, when the metal impurities flow with the coolant through the area where the magnetic suction member 8 is provided, the metal impurities will be absorbed by the magnetic suction member 8, so as to prevent the metal impurities from continuing to flow with the coolant as much as possible, thereby effectively reducing the spread of metal impurities in the coolant, and further protecting the energy storage battery system from damage by the metal impurities.

[0042] In the present application, the battery module is immersed in the coolant, and can quickly absorb heat through immersion liquid cooling, and bring it to the external circulation for cooling, ensuring that the battery operates within the optimal temperature range, and effectively suppressing the battery thermal runaway problem, thereby improving the safety of the battery. However, since the coolant will circulate in the battery pack 1, the liquid cooling pipe 7 assembly is used to achieve the adsorption of metal impurities, so as to minimize the flow of metal impurities into the battery pack 1 of the energy storage battery system, thereby avoiding the metal impurities from affecting the normal operation of the energy storage battery system as much as possible.

[0043] In some embodiments, the liquid cooling pipe 7 includes a first pipe section, the first pipe section connects the liquid cooling device 2 and the inner cavity 111, and the magnetic suction component 8 is installed in the first pipe. It can be understood that, without considering the leakage of the coolant, the coolant circulates between the liquid cooling device 2 and the inner cavity 111 of the battery pack 1, and the coolant flows from the direction of the liquid cooling device 2 to the inner cavity 111, and the coolant exchanges heat with the battery module in the inner cavity 111, and then flows from the inner cavity 111 to the liquid cooling device 2. Thus, along the flow direction of the coolant, the magnetic suction component 8 is installed in the first pipe, that is, the magnetic suction component 8 is located upstream of the battery pack 1. It can be understood that metal impurities can be adsorbed and retained when the coolant passes through the magnetic suction section, so that the coolant can minimize the metal dust from entering the battery pack 1 again during the circulation of the coolant.

[0044] In some examples, the magnetic member 8 can be disposed outside the liquid cooling pipe 7, so that the magnetic member 8 does not interfere with the normal flow of the coolant in the liquid cooling pipe 7. In other examples, it can also be disposed in the liquid cooling pipe 7. It is understandable that when the magnetic member 8 is disposed in the liquid cooling pipe 7, the diameter of the liquid cooling pipe 7 corresponding to the position of the magnetic member 8 needs to be set larger to avoid the magnetic member 8 affecting the flow of the coolant as much as possible.

[0045] In some embodiments, the magnetic attraction member 8 can be a permanent magnet such as a neodymium iron boron magnet, a cobalt magnet, or a ferrite magnet.

[0046] Reference Figure 5In some embodiments, the magnetic attraction includes a first magnetic attraction member 81 and a second magnetic attraction member 82; the first magnetic attraction member 81 and the second magnetic attraction member 82 are arranged on the outer wall of the liquid cooling pipe 7, and the first magnetic attraction member 81 and the second magnetic attraction member 82 are magnetically connected and surround the liquid cooling pipe 7 together. As a result, the installation method of the first magnetic attraction member 81 and the second magnetic attraction member 82 is simple and convenient, and the two can be easily connected or disassembled during use. When the liquid cooling pipe 7 needs to be replaced, the user can also remove the first magnetic attraction member 81 and the second magnetic attraction member 82 from the old liquid cooling pipe 7, and occasionally reinstall the first magnetic attraction member 81 and the second magnetic attraction member 82 to the new liquid cooling pipe 7. In addition, since the first magnetic attraction member 81 and the second magnetic attraction member 82 are arranged on the outer wall of the liquid cooling pipe 7, the user can also flexibly adjust the position of the magnetic attraction member 8 according to the usage situation, and magnetically attract the first magnetic attraction member 81 and the second magnetic attraction member 82 to different areas on the liquid cooling pipe 7.

[0047] Reference Figure 6 In some embodiments, the magnetic member 8 is in a cylindrical structure, and the magnetic member 8 is sleeved on the liquid cooling pipe 7. Specifically, the inner wall of the magnetic member 8 in a cylindrical structure can be closely attached to the outer wall of the liquid cooling pipe 7, thereby achieving a better magnetic attraction effect, so as to fully absorb the metal impurities in the coolant.

[0048] In summary, in the energy storage battery system of the present application, the second shell 12 of the battery pack 1 is sleeved on the first shell 11. When the first shell 11 leaks coolant, the accommodating cavity 121 of the second shell 12 can initially store the leaked coolant, thereby effectively preventing the leaked coolant from flowing out of the energy storage battery system and polluting the surrounding environment. In addition, the setting of the leakage collection device 3 can also collect the coolant in the accommodating cavity 121, thereby avoiding excessive coolant in the accommodating cavity 121 and leakage again. And the coolant collected by the leakage collection device 3 can be transported to the liquid cooling device 2 again, so that the leaked coolant re-enters the circulation of the energy storage battery system, reducing the waste of coolant.

[0049] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0052] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

[0053] Although the present invention is specifically described above in conjunction with the accompanying drawings and embodiments, it is to be understood that the above description does not limit the present invention in any form. Those skilled in the art can deform and change the present invention as needed without departing from the essential spirit and scope of the present invention, and these deformations and changes all fall within the scope of the present invention.

Claims

1. An energy storage battery system, characterized in that: include: A battery pack, comprising a first shell, a second shell and a battery module, wherein the second shell is provided with a receiving cavity, the first shell is arranged in the receiving cavity, the first shell is provided with an inner cavity, the inner cavity is used to receive a coolant, the battery module is arranged in the inner cavity, and the receiving cavity is used to collect the coolant leaked from the inner cavity; A liquid cooling device is connected to the inner cavity and is used to transport cooling liquid to the inner cavity.

2. The energy storage battery system according to claim 1, characterized in that: The energy storage battery system also includes a leakage collection device, which is respectively connected to the accommodating cavity and the liquid cooling device. The leakage collection device can collect the cooling liquid in the accommodating cavity and can transport the cooling liquid to the liquid cooling device.

3. The energy storage battery system according to claim 2, characterized in that: The energy storage battery system includes a plurality of battery packs, and the accommodating cavities of the plurality of battery packs are all connected to the same leakage collection device.

4. The energy storage battery system according to claim 2, characterized in that: Along the gravity direction, the leakage collecting device is located below the accommodating cavity, so that the cooling liquid in the accommodating cavity flows into the leakage collecting device.

5. The energy storage battery system according to claim 2, characterized in that: The energy storage battery system also includes a first water pump, which connects the accommodating chamber and the leakage collection device, and is used to transport the cooling liquid in the accommodating chamber to the leakage collection device.

6. The energy storage battery system according to claim 1, characterized in that: The energy storage battery system further includes a solenoid valve and a liquid level detection device, wherein the solenoid valve is connected to the liquid outlet of the accommodating chamber, and the solenoid valve is used to open or close the liquid outlet; The liquid level detection device is arranged in the accommodating cavity, and the liquid level detection device is connected to the solenoid valve. The liquid level detection device is used to detect that when the coolant reaches a preset height, trigger the solenoid valve to open or close the liquid outlet.

7. The energy storage battery system according to claim 6, characterized in that: The liquid level detection device comprises a first liquid level sensor and a second liquid level sensor, and along the gravity direction, the second liquid level sensor is located below the first liquid level sensor; The first liquid level sensor is used to detect that when the liquid level of the coolant reaches a first position, trigger the solenoid valve to open the liquid outlet; The second liquid level sensor is used to detect that when the liquid level of the coolant reaches a second position, trigger the solenoid valve to close the liquid outlet.

8. The energy storage battery system according to claim 6, characterized in that: The liquid level detection device includes a third liquid level sensor; When the third liquid level sensor detects that the coolant is at the first preset position, the solenoid valve is triggered to open the liquid outlet; When the third liquid level sensor detects that the coolant is at the second preset position, the solenoid valve is triggered to close the liquid outlet; The second preset position is located below the first preset position.

9. The energy storage battery system according to claim 2, characterized in that: The energy storage battery system also includes a second water pump, which connects the leakage collection device and the liquid cooling device, and is used to transport the cooling liquid of the leakage recovery device to the liquid cooling device.

10. The energy storage battery system according to any one of claims 2 to 9, characterized in that: The energy storage battery system also includes: A liquid cooling pipe, the liquid cooling pipe is used to transport the cooling liquid, the liquid cooling pipe connects the accommodating cavity, the leakage collecting device, the liquid cooling device and the inner cavity; A magnetic attraction component is installed in the liquid cooling pipeline to absorb metal impurities in the cooling liquid.

11. The energy storage battery system according to claim 10, characterized in that: The liquid cooling pipeline includes a first pipe section, the first pipe section connects the liquid cooling device and the inner cavity, and the magnetic attraction component is installed on the first pipe.

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