Energy storage device

Abstract

The present application relates to the field of energy storage technology, and provides an energy storage device. In the energy storage device provided by the present application, both the first circulation component and the temperature sensing component exchange heat with the energy storage component through the internal circulating medium. At the first temperature change rate, the flow rate of the circulating medium in the first circulation component changes synchronously with the temperature of the corresponding circulation component, so that the temperature of the corresponding circulation component can be synchronously controlled by the first circulation component. At the second temperature change rate, when the heating rate is too fast, the circulating medium in the first circulation component stops circulating in this case. On this basis, if the energy storage component continues to heat up, the circulating medium is released from the first circulation component to the corresponding energy storage component, and the circulating medium is directly released to the outside of the energy storage component, thereby curbing the continued heating of the energy storage component and controlling the temperature of the energy storage component.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage device. Background Art

[0002] After existing power batteries are retired from cars, some will be used in energy storage devices, thereby achieving cascade utilization and avoiding significant waste of materials and energy.

[0003] In order to save space and facilitate management, this type of energy storage device for recycling power batteries generally stacks multiple power batteries in a centralized manner. However, power batteries generate a lot of heat during the charging and discharging process. As a result, the heat generated by the centralized power batteries will accumulate, which will increase the risk of battery spontaneous combustion. Therefore, they are generally placed in a confined space and cooled by cold air.

[0004] However, this method still has certain defects. That is, due to its large mass, cold air will generally sink to the bottom of the space, while hot air will float up. As a result, the power batteries at high places will not be cooled well. At this time, fans are generally used to increase air circulation. However, since there are many power batteries stacked inside the space, this will produce more wind resistance, resulting in slower cooling in the middle area of ​​the stacked batteries. Therefore, the existing cooling method still has many limitations. Summary of the invention

[0005] In view of this, the present application provides an energy storage device, the purpose of which is to solve the above technical problems to a certain extent.

[0006] In a first aspect, the present application provides an energy storage device, the energy storage device comprising a plurality of storage portions and a plurality of energy storage components, the plurality of energy storage components being arranged in the plurality of storage portions in a one-to-one correspondence, the storage portions comprising:

[0007] a first circulation component, the first circulation component being attached to the corresponding energy storage component, and the first circulation component being used for circulating a circulating medium to exchange heat with the energy storage component;

[0008] A temperature sensing mechanism, the temperature sensing mechanism is attached to the corresponding energy storage component, the temperature sensing mechanism is used to accommodate a circulating medium to exchange heat with the energy storage component, and the temperature sensing mechanism can also feedback the temperature change rate of the corresponding energy storage component;

[0009] wherein, in response to the temperature of the energy storage component changing at a first temperature change rate, the flow rate of the circulating medium in the first circulation component increases as the temperature of the energy storage component increases, and decreases as the temperature of the energy storage component decreases;

[0010] In which, in response to the energy storage component heating up at a second temperature change rate greater than the first temperature change rate, the circulating medium in the first circulation component stops circulating, and in response to the energy storage component continuing to heat up, the circulating medium in the first circulation component can be released to the corresponding energy storage component.

[0011] Based on the above technical solution, optionally, the temperature sensing mechanism includes a second circulation component, which is used to accommodate a circulating medium, and the second circulation component is configured to feedback the temperature change rate of the energy storage component corresponding to the pressure of the circulating medium accommodated in the second circulation component.

[0012] On the basis of any of the above technical solutions, optionally, the temperature sensing mechanism further includes a valve member, and the energy storage device further includes a liquid inlet path, and the liquid inlet path is connected to the first circulation component and the second circulation component;

[0013] Wherein, the valve member comprises a control path and a valve cavity, the valve cavity is located at the upstream side of the first circulation component and the second circulation component, and the control path communicates with the second circulation component and the valve cavity to feed back the pressure of the circulating medium in the second circulation component to the valve member;

[0014] Wherein, in response to the temperature of the energy storage assembly changing at a first temperature change rate, the opening of the valve member increases as the temperature of the energy storage assembly increases, and decreases as the temperature of the energy storage assembly decreases;

[0015] Wherein, in response to the energy storage component heating up at a second temperature change rate, the valve member is closed.

[0016] On the basis of any of the above technical solutions, optionally, the valve component also includes a valve core arranged in the valve cavity and a reset component abutting against the valve core, the control path and the reset component are respectively located on two sides opposite to each other of the valve core, the reset component is used to apply a reset force toward the control path to the valve core, the valve core is subjected to the pressure fed back from the control path, and the valve core moves between the control path and the reset component to change the opening of the valve component.

[0017] On the basis of any of the above technical solutions, optionally, the first circulation component includes a plurality of spray structures arranged toward the corresponding energy storage components, and the spray structures have partition parts;

[0018] In which, in response to the corresponding energy storage component continuing to heat up based on the second temperature change rate: the partition part is broken by the pressure of the circulating medium in the first circulation component, and / or the partition part is broken by phase change at the temperature provided by the corresponding energy storage component.

[0019] Based on any of the above technical solutions, optionally, the first circulation component includes:

[0020] A first circulation housing, wherein the first circulation housing is disposed outside the corresponding energy storage assembly;

[0021] A circulation path is provided inside the first circulation shell, and the circulation path is used to circulate the circulation medium, wherein the circulation path extends inside the first circulation shell in a winding and / or meandering manner.

[0022] On the basis of any of the above technical solutions, optionally, the first circulation component includes a plurality of spray structures arranged toward the corresponding energy storage components, and the spray structures have partition parts;

[0023] Wherein, in response to the corresponding energy storage component continuing to heat up on the basis of the second temperature change rate: the partition part is broken by the pressure of the circulating medium in the first circulation component, and / or the partition part is broken by phase change at the temperature provided by the corresponding energy storage component;

[0024] The circulation path includes a plurality of circulation parts arranged at intervals on the top of the first circulation shell, and each of the circulation parts is connected to at least one spray structure.

[0025] On the basis of any of the above technical solutions, optionally, the temperature sensing mechanism includes:

[0026] The second circulation shell is arranged at the bottom of the corresponding energy storage assembly, and the second circulation shell has a cavity, and the cavity is used to accommodate the circulating medium.

[0027] Based on any of the above technical solutions, optionally, the energy storage device further includes:

[0028] a circulating medium supply assembly, the circulating medium supply assembly being in communication with both the first circulating shell and the second circulating shell, the circulating medium supply assembly being used to supply circulating medium to the first circulating shell and the second circulating shell;

[0029] A heat dissipation component is arranged outside a partial structure of the circulating medium supply component, the circulating medium flows in the partial structure of the circulating medium supply component, and the heat dissipation component is used to exchange heat with the circulating medium in the partial structure of the circulating medium supply component.

[0030] Based on any of the above technical solutions, optionally, the first circulation component includes:

[0031] A first circulation shell, wherein the first circulation shell is covered on the outside of the corresponding energy storage assembly. The first circulation shell is connected to the second circulation shell to form a cavity for storing the corresponding energy storage assembly;

[0032] A circulation path is provided inside the first circulation shell, and the circulation path is used to circulate the circulation medium, wherein the circulation path extends inside the first circulation shell in a winding and / or meandering manner.

[0033] In the energy storage device provided by the present application, both the first circulation component and the temperature sensing component exchange heat with the energy storage component through the internal circulation medium, thereby being able to change the temperature of the energy storage component, and the energy storage device can adopt different strategies to deal with the temperature of the corresponding energy storage component fed back by the temperature sensing component. That is, at the first temperature change rate, the flow rate of the circulation medium in the first circulation component changes synchronously with the temperature of the corresponding circulation component, so that the temperature of the corresponding circulation component can be synchronously controlled by the first circulation component.

[0034] The energy storage device provided by the present application has a second temperature change rate that is greater than the first temperature change rate at the second temperature change rate. This rapid temperature rise is a temperature rise that poses a safety threat to the energy storage component. When the temperature rise rate is too fast, even if the flow rate of the circulating medium in the first circulation component increases, it is difficult to curb the rapid increase in temperature of the energy storage component. Therefore, the circulating medium in the first circulation component stops circulating in this case. On this basis, if the energy storage component continues to heat up, the first circulation component releases the circulating medium to the corresponding energy storage component, and the circulating medium is directly released to the outside of the energy storage component, thereby curbing the continued temperature rise of the energy storage component and controlling the temperature of the energy storage component.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a three-dimensional diagram of an energy storage device provided according to an embodiment of the present application is shown.

[0037] Figure 2 A schematic diagram of another three-dimensional diagram of an energy storage device provided according to an embodiment of the present application is shown.

[0038] Figure 3 A schematic diagram of an exploded view of an energy storage device provided according to an embodiment of the present application is shown.

[0039] Figure 4 A schematic diagram of another three-dimensional diagram of an energy storage device provided according to an embodiment of the present application is shown.

[0040] Figure 5Shows Figure 4 Schematic diagram of the enlarged view at A in the middle.

[0041] Figure 6 A schematic diagram showing the internal structure of a temperature sensing mechanism of an energy storage device provided according to an embodiment of the present application is shown.

[0042] Figure 7 Shows Figure 6 Schematic diagram of the enlarged view at B in the figure.

[0043] Figure 8 A schematic diagram showing another internal structure of the temperature sensing mechanism of the energy storage device provided in an embodiment of the present application is shown.

[0044] Fig. 9 Shows Figure 8 Schematic diagram of the enlarged view at C in the middle.

[0045] Fig.10 A schematic diagram of a three-dimensional diagram of a first circulation component provided according to an embodiment of the present application is shown.

[0046] Fig.11 A schematic diagram showing the internal structure of a first circulation component provided according to an embodiment of the present application is shown.

[0047] Fig.12 A schematic diagram of a nozzle structure of an energy storage device provided according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0048] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0049] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0052] According to an embodiment of the present application, an energy storage device is provided. Figures 1 to 12 The structure and working principle of the energy storage device are described in detail.

[0053] According to the energy storage device provided in the embodiment of the present application, the energy storage device includes multiple storage parts and multiple energy storage components. The aforementioned multiple energy storage components are arranged in the aforementioned multiple storage parts in a one-to-one correspondence, and the storage parts include a first circulation component and a temperature sensing mechanism.

[0054] In an embodiment, the first circulation component is attached to the corresponding energy storage component, and the first circulation component is used to circulate the circulation medium to exchange heat with the energy storage component. In an embodiment, the temperature sensing mechanism is attached to the corresponding energy storage component, and the temperature sensing mechanism is used to accommodate the circulation medium to exchange heat with the energy storage component. The temperature sensing mechanism can also feedback the temperature change rate of the corresponding energy storage component.

[0055] In an embodiment, in response to the temperature of the energy storage assembly changing at a first temperature change rate, the flow rate of the circulating medium in the first circulation assembly increases as the temperature of the energy storage assembly increases, and decreases as the temperature of the energy storage assembly decreases.

[0056] In an embodiment, in response to the energy storage component heating up at a second temperature change rate greater than the first temperature change rate, the circulating medium in the first circulation component stops circulating, and in response to the energy storage component continuing to heat up, the circulating medium in the first circulation component can be released to the corresponding energy storage component.

[0057] In this way, in the energy storage device provided by the embodiment of the present application, both the first circulation component and the temperature sensing component exchange heat with the energy storage component through the internal circulation medium, thereby being able to change the temperature of the energy storage component, and the energy storage device can adopt different strategies to deal with the temperature of the corresponding energy storage component fed back by the temperature sensing component. That is, at the first temperature change rate, the flow rate of the circulation medium in the first circulation component changes synchronously with the temperature of the corresponding circulation component, so that the temperature of the corresponding circulation component can be synchronously controlled by the first circulation component.

[0058] According to the energy storage device provided by the embodiment of the present application, at the second temperature change rate, the second temperature change rate is greater than the first temperature change rate. This rapid temperature rise is a temperature rise that poses a safety threat to the energy storage component. When the temperature rise rate is too fast, even if the flow rate of the circulating medium in the first circulation component increases, it is difficult to curb the rapid increase in temperature of the energy storage component. Therefore, the circulating medium in the first circulation component stops circulating in this case. On this basis, if the energy storage component continues to heat up, the first circulation component releases the circulating medium to the corresponding energy storage component, and the circulating medium is directly released to the outside of the energy storage component, thereby curbing the continued temperature rise of the energy storage component and controlling the temperature of the energy storage component.

[0059] In an embodiment, the first temperature change rate may characterize the temperature change rate of the circulation component under normal working conditions, and as described above, the second temperature change rate is greater than the first temperature change rate, which poses a greater safety threat to the energy storage component. For example, the second temperature change rate may be the temperature change rate at which a battery is about to experience thermal runaway, and the second temperature change rate essentially characterizes a rapid temperature rise. Therefore, if the energy storage component continues to heat up at the second temperature change rate, then before thermal runaway is about to occur or during thermal runaway, the first circulation component releases the internal circulating medium to control thermal runaway and spontaneous combustion of the energy storage component.

[0060] In an embodiment, the energy storage component may be, for example, one or more power batteries. In the case of multiple power batteries, the energy storage component may be a complete battery pack or may include multiple battery packs.

[0061] According to the energy storage device provided in the embodiment of the present application, the temperature sensing mechanism may include a second circulation component, which is used to accommodate a circulating medium. The second circulation component may be configured to feedback the temperature change rate of the energy storage component corresponding to the pressure of the circulating medium accommodated in the second circulation component.

[0062] According to the energy storage device provided in the embodiment of the present application, when the circulating medium contained in the second circulation component is heated up by heat exchange with the energy storage component, the pressure will also be increased synchronously, and vice versa. Therefore, by using this pressure feedback, while exchanging heat with the energy storage component, the temperature change rate of the energy storage component can also be fed back, but there is no need to set up additional structures such as sensors and circuits used in related technologies.

[0063] According to the energy storage device provided in the embodiment of the present application, the temperature sensing mechanism further includes a valve component, and the energy storage device further includes a liquid inlet path, which connects the first circulation component and the second circulation component.

[0064] In an embodiment, the valve member includes a control path and a valve cavity, the valve cavity is located on the upstream side of the first circulation component and the second circulation component, and the control path connects the second circulation component and the valve cavity to feedback the pressure of the circulating medium in the second circulation component to the valve member. In an embodiment, in response to the temperature of the energy storage component changing at a first temperature change rate, the opening of the valve member increases as the temperature of the energy storage component increases, and decreases as the temperature of the energy storage component decreases. In an embodiment, in response to the energy storage component heating up at a second temperature change rate, the valve member is closed.

[0065] According to the energy storage device provided in the embodiment of the present application, the valve component may further include a valve core arranged in the valve cavity and a reset component abutting against the valve core, the control path and the reset component may be respectively located on two opposite sides of the valve core, the reset component may be used to apply a reset force toward the control path to the valve core, the valve core may withstand the pressure fed back from the control path, and the valve core may move between the control path and the reset component (that is, the valve core moves in the valve cavity under the combined action of the reset force, the pressure fed back from the control path, and external forces such as friction) to change the opening of the valve component.

[0066] According to the energy storage device provided in the embodiment of the present application, the first circulation component may include a plurality of spray structures arranged toward the corresponding energy storage component, and the spray structure may have a partition. In the embodiment, in response to the corresponding energy storage component continuing to heat up on the basis of the second temperature change rate: the partition is broken by the pressure of the circulating medium in the first circulation component, and / or the partition changes phase at the temperature provided by the corresponding energy storage component (for example, the partition melts from a solid state to a liquid state at a high temperature, and this high temperature may be a simple increase in the ambient temperature, or the partition may be directly burned through by the flame of the self-ignition of the energy storage component) and broken.

[0067] According to the energy storage device provided in the embodiment of the present application, the first circulation component may include a first circulation shell and a circulation path. The first circulation shell may be covered on the outside of the corresponding energy storage component, and the circulation path may be arranged inside the first circulation shell. The circulation path is used to circulate the circulating medium. In the embodiment, the circulation path extends inside the first circulation shell in a winding and / or meandering manner.

[0068] According to the energy storage device provided in the embodiment of the present application, in the embodiment, the circulation path may include a plurality of spaced-apart flow sections located at the top of the first circulation shell, each flow section being connected to at least one spray structure, for example, each flow section is connected to a plurality of spray structures along the extension direction of the flow section.

[0069] According to the energy storage device provided in the embodiment of the present application, the temperature sensing mechanism may include a second circulation shell, the second circulation shell may be arranged at the bottom of the corresponding energy storage component, the second circulation shell may have a cavity, and the cavity may be used to accommodate the circulating medium.

[0070] According to the energy storage device provided in the embodiment of the present application, the energy storage device may further include a circulating medium supply assembly and a heat dissipation assembly. The circulating medium supply assembly may be in communication with both the first circulating shell and the second circulating shell, and the circulating medium supply assembly may be used to provide circulating medium to the first circulating shell and the second circulating shell. The heat dissipation assembly may be arranged outside a partial structure of the circulating medium supply assembly, and the circulating medium circulates in the partial structure of the circulating medium supply assembly, and the heat dissipation assembly may be used to exchange heat with the circulating medium in the partial structure of the circulating medium supply assembly.

[0071] According to the energy storage device provided in the embodiment of the present application, the first circulation shell can be connected to the second circulation shell to form a cavity for storing the corresponding energy storage component, thereby forming an all-round covering of the corresponding energy storage component, effectively improving the heat exchange efficiency with the energy storage component.

[0072] Based on the technical features described above, the structure of the energy storage device will be described in a more specific manner below.

[0073] In an embodiment, the energy storage device provided according to the embodiment of the present application substantially provides an energy storage device for cascade utilization of power batteries.

[0074] The energy storage device provided in the embodiment of the present application specifically includes the following structure:

[0075] A cabinet 1, a cabinet door 2 is rotatably mounted on the front of the cabinet 1, and a power battery can be placed in the cabinet 1;

[0076] There are several racks 3, which are evenly and fixedly installed inside the cabinet 1, and the power batteries are placed on the racks 3;

[0077] The heat dissipation assembly includes a heat dissipation cover 4, a heat exchange tube 5 and a liquid supply assembly. The heat dissipation cover 4 is fixedly mounted on the frame plate 3, and the heat dissipation cover 4 can be covered on the surface of the power battery. The heat exchange tube 5 is arranged in the cover wall of the heat dissipation cover 4 and is arranged in a spiral shape. The liquid supply assembly is installed in the cabinet 1, and circulating coolant is introduced into the heat exchange tube 5 through the liquid supply assembly;

[0078] The control component is connected between the frame plate 3 and the heat exchange tube 5, and the flow rate of the coolant entering the heat exchange tube 5 can be automatically controlled by the control component.

[0079] In an embodiment, the heat dissipation component may further include a nozzle 6, a connecting sleeve 7 and a sealing film 8. There are several nozzles 6, and all are fixedly installed on the inner wall of the heat dissipation cover 4 close to the frame plate 3, and the nozzle 6 is connected to the heat exchange tube 5. The connecting sleeve 7 is fixedly installed at one end of the nozzle 6 away from the heat dissipation cover 4. The sealing film 8 is fixedly installed in the middle of the connecting sleeve 7, and the coolant inside the heat exchange tube 5 boils and generates air pressure, which can break through the sealing film 8, and the sealing film 8 can be burned through by fire.

[0080] In an embodiment, the liquid supply component may include a liquid supply pipe 9, a liquid return pipe 10, a first connecting pipe 11, a second connecting pipe 12, a third connecting pipe 13 and a cooling component. The liquid supply pipe 9 and the liquid return pipe 10 are fixedly installed in the cabinet 1, and the liquid supply pipe 9 and the liquid return pipe 10 are respectively connected to the liquid outlet and liquid inlet of the external coolant pump, the first connecting pipe 11 and the second connecting pipe 12 are connected through the control component, the end of the first connecting pipe 11 away from the control component is connected to the liquid supply pipe 9, the end of the second connecting pipe 12 away from the control component is connected to the liquid inlet end of the heat exchange tube 5, one end of the third connecting pipe 13 is connected to the liquid outlet end of the heat exchange tube 5, and the other end is connected to the liquid return pipe 10, the cooling component is connected to the liquid supply pipe 9 and the liquid return pipe 10, and the cooled coolant is sent into the liquid supply pipe 9 through the cooling component.

[0081] In an embodiment, the cooling assembly may include a water pump 14, a liquid storage tank 15, a cooling pipe 16 and a cooling fan 17. The water pump 14, the liquid storage tank 15, the cooling pipe 16 and the cooling fan 17 are all fixedly installed on the back of the cabinet 1, the liquid inlet of the water pump 14 is connected to the liquid storage tank 15, the liquid outlet of the water pump 14 is connected to the liquid supply pipe 9, the water inlet end of the cooling pipe 16 is connected to the liquid return pipe 10, the water outlet end of the cooling pipe 16 is connected to the liquid storage tank 15, and the air inlet surface of the cooling fan 17 faces the cooling pipe 16.

[0082] In an embodiment, the control component includes a control chamber 18, a control column 19, a first flow channel 20 and a driving component. The control chamber 18 and the first flow channel 20 are both arranged in the middle of the frame plate 3. The first flow channel 20 connects the first connecting tube 11 and the second connecting tube 12. The control chamber 18 runs through the first flow channel 20. The control column 19 is slidably arranged in the control chamber 18, and the control column 19 can cut off the first flow channel 20. A through hole 21 is opened on the surface of the control column 19, and when the through hole 21 is aligned with the first flow channel 20, the first flow channel 20 can be connected. The driving component is connected to the control column 19, and the driving component can push the control column 19 to slide in the control chamber 18 when the temperature of the frame plate 3 changes.

[0083] In the embodiment, the driving component includes a temperature sensing chamber 22, a second flow channel 23 and a reset component. The temperature sensing chamber 22 is arranged in the middle of the frame plate 3, and the temperature sensing chamber 22 is connected to the first flow channel 20. The second flow channel 23 is fixedly arranged in the middle of the frame plate 3, and the second flow channel 23 connects the temperature sensing chamber 22 and the control chamber 18. At the same time, the coolant flowing into the control chamber 18 through the second flow channel 23 can push the control column 19 to slide. The reset component is installed in the control chamber 18, and the control column 19 can be reset by the reset component.

[0084] In the embodiment, the reset assembly includes a compression spring 24 , which is installed between the control column 19 and the side of the control chamber 18 , and the contact end of the compression spring 24 and the control column 19 is away from the second flow channel 23 .

[0085] In the embodiment, the reset assembly further includes a guide groove 25 and a guide block 26 . The guide groove 25 is provided in the control cavity 18 . The guide block 26 is fixedly mounted at the end of the control column 19 , and the guide block 26 is slidably mounted in the guide groove 25 .

[0086] In the embodiment, when the control column 19 is close to the inner side of the control chamber 18 close to the second flow channel 23, part of the cross-section of the conducting hole 21 is aligned with the first flow channel 20, and when the control column 19 slides in the direction of the compression spring 24, the cross-section of the conducting hole 21 aligned with the first flow channel 20 will gradually increase until they are fully aligned and then gradually shrink until the first flow channel 20 is closed.

[0087] When the energy storage device is in use, it is only necessary to place the battery on the rack 3, and then introduce coolant into the liquid storage tank 15. The coolant can be water, preferably a non-conductive coolant, and then start the water pump 14. The water pump 14 will pump the coolant inside the liquid storage tank 15 into the liquid supply pipe 9, and then enter the first flow channel 20 through the first connecting pipe 11. At this time, the control column 19 is tightly attached to the inner wall of the control cavity 18 under the action of the compression spring 24, so that part of the cross-section of the through hole 21 coincides with the first flow channel 20. Therefore, the coolant can pass through the first flow channel 20, and part of it will enter the temperature sensing cavity 22, and the other part will enter the heat exchange tube 5 through the second connecting pipe 12. The coolant inside the heat exchange tube 5 will enter the return pipe 10 from the third connecting pipe 13, and then pass through the cooling pipe 16 and finally flow back to the liquid storage tank 15.

[0088] During this process, the coolant entering the temperature sensing chamber 22 and the heat exchange tube 5 will absorb the heat generated by the battery. When the temperature rises to a certain level, the cooling fan 17 can be started. The cooling fan 17 will take away the heat on the surface of the cooling tube 16 and finally take away the heat of the coolant. In this way, the entire cooling process is completed. Furthermore, the cooling tube 16 can also be in contact with the cold end of other refrigeration equipment for cooling. This application only cites one heat dissipation method.

[0089] In the embodiment, during use, when the heat generated by the battery is absorbed by the coolant inside the temperature sensing chamber 22, the coolant inside the temperature sensing chamber 22 will expand, causing the pressure inside the temperature sensing chamber 22 to increase. In this way, part of the expanded coolant will enter the control chamber 18 through the second flow channel 23, thereby pushing the control column 19 to slide, and then gradually increasing the overlap between the cross section of the through hole 21 and the first flow channel 20, which will increase the coolant flow in the first flow channel 20, so that the coolant inside the heat exchange tube 5 is replaced faster, thereby accelerating the cooling. After the battery temperature drops, the coolant inside the temperature sensing chamber 22 will shrink again. At this time, the control column 19 will be reset under the action of the compression spring 24, so that the flow of the first flow channel 20 will be reduced, so that the coolant inside the heat exchange tube 5 is replaced more slowly, thereby maintaining the temperature of the battery. In this way, the individual heat dissipation control of each battery can be automatically realized, thereby avoiding the situation where some batteries are overheated and the heat dissipation is not timely.

[0090] In addition, if the battery ignites spontaneously, the battery will heat up rapidly or even catch fire. In this way, the coolant inside the temperature sensing cavity 22 will expand further, thereby pushing the control column 19 to slide a greater distance, causing the conducting hole 21 and the first flow channel 20 to be misaligned. In this way, the first flow channel 20 will be closed. At this time, the coolant inside the heat exchange tube 5 will be continuously heated until it boils, which will generate air pressure inside the heat exchange tube 5. When the air pressure reaches a certain value, it will break through the sealing film 8, so that the coolant inside the heat exchange tube 5 will be sprayed out from the nozzle 6, which will extinguish the fire of the battery. When the coolant inside the heat exchange tube 5 is completely sprayed, the coolant inside the temperature sensing cavity 22 will enter the heat exchange tube 5 from the first flow channel 20 under the action of pressure. At this time, the control column 19 will lose pressure and will be reset, so that the coolant in the liquid supply pipe 9 can continuously enter the heat exchange tube 5 to achieve continuous spraying fire extinguishing.

[0091] In summary, during the entire use process, the heat dissipation cover 4 and the heat exchange tube 5 in the heat dissipation assembly are mainly used to cool the battery. This method can directly transport the coolant to the periphery of the battery for cooling, thereby avoiding heat accumulation in the middle of the stacked battery stack and achieving a better heat dissipation effect.

[0092] Moreover, during use, the control component can automatically control the coolant flow rate of the heat exchange tube 5 inside the heat dissipation cover 4 near each battery, so that when the battery is at high temperature, the flow rate is automatically increased to quickly cool it down, and when the battery is cooled, the flow rate is automatically reduced to keep it warm. The temperature control is more precise, and each battery can be controlled individually, making it more convenient to use.

[0093] In addition, during use, when the battery spontaneously ignites, the control component and the heat dissipation component will spray out the coolant inside the heat exchange tube 5 to extinguish the battery, further enhancing the fire protection ability of the battery and making it safer to use.

[0094] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. All equivalent structural changes made by using the contents of the present application specification and drawings under the innovative concept of the present application, or directly / indirectly applied in other related technical fields are included in the protection scope of the present application.

Claims

1. An energy storage device, characterized in that: The energy storage device comprises a plurality of storage parts and a plurality of energy storage components, wherein the plurality of energy storage components are arranged in the plurality of storage parts in a one-to-one correspondence, and the storage parts comprise: a first circulation component, the first circulation component being attached to the corresponding energy storage component, and the first circulation component being used for circulating a circulating medium to exchange heat with the energy storage component; A temperature sensing mechanism, the temperature sensing mechanism is attached to the corresponding energy storage component, the temperature sensing mechanism is used to accommodate a circulating medium to exchange heat with the energy storage component, and the temperature sensing mechanism can also feedback the temperature change rate of the corresponding energy storage component; wherein, in response to the temperature of the energy storage component changing at a first temperature change rate, the flow rate of the circulating medium in the first circulation component increases as the temperature of the energy storage component increases, and decreases as the temperature of the energy storage component decreases; Wherein, in response to the energy storage component heating up at a second temperature change rate greater than the first temperature change rate, the circulating medium in the first circulation component stops circulating, and in response to the energy storage component continuing to heat up, the circulating medium in the first circulation component can be released to the corresponding energy storage component; The temperature sensing mechanism includes a second circulation component, the second circulation component is used to accommodate a circulating medium, and the second circulation component is configured to feedback the temperature change speed of the energy storage component corresponding to the pressure of the circulating medium accommodated in the second circulation component; The temperature sensing mechanism further includes a valve component, and the energy storage device further includes a liquid inlet path, wherein the liquid inlet path is connected to the first circulation component and the second circulation component; Wherein, the valve member comprises a control path and a valve cavity, the valve cavity is located at the upstream side of the first circulation component and the second circulation component, and the control path communicates with the second circulation component and the valve cavity to feed back the pressure of the circulating medium in the second circulation component to the valve member; Wherein, in response to the temperature of the energy storage assembly changing at a first temperature change rate, the opening of the valve member increases as the temperature of the energy storage assembly increases, and decreases as the temperature of the energy storage assembly decreases; wherein, in response to the energy storage component heating up at a second temperature change rate, the valve member is closed; The valve component also includes a valve core arranged in the valve cavity and a reset component abutting against the valve core. The control path and the reset component are respectively located on two opposite sides of the valve core. The reset component is used to apply a reset force toward the control path to the valve core. The valve core is subjected to the pressure fed back from the control path. The valve core moves between the control path and the reset component to change the opening of the valve component.

2. The energy storage device according to claim 1, characterized in that: The first circulation component comprises a plurality of spray structures arranged toward the corresponding energy storage components, and the spray structures have partition parts; In which, in response to the corresponding energy storage component continuing to heat up based on the second temperature change rate: the partition part is broken by the pressure of the circulating medium in the first circulation component, and / or the partition part is broken by phase change at the temperature provided by the corresponding energy storage component.

3. The energy storage device according to claim 1, characterized in that: The first cycle component comprises: A first circulation housing, wherein the first circulation housing is disposed outside the corresponding energy storage assembly; A circulation path is provided inside the first circulation shell, and the circulation path is used to circulate the circulation medium, wherein the circulation path extends inside the first circulation shell in a winding and / or meandering manner.

4. The energy storage device according to claim 3, characterized in that: The first circulation component comprises a plurality of spray structures arranged toward the corresponding energy storage components, and the spray structures have partition parts; Wherein, in response to the corresponding energy storage component continuing to heat up on the basis of the second temperature change rate: the partition part is broken by the pressure of the circulating medium in the first circulation component, and / or the partition part is broken by phase change at the temperature provided by the corresponding energy storage component; The circulation path includes a plurality of circulation parts arranged at intervals on the top of the first circulation shell, and each of the circulation parts is connected to at least one spray structure.

5. The energy storage device according to claim 1, characterized in that: The temperature sensing mechanism comprises: The second circulation shell is arranged at the bottom of the corresponding energy storage assembly, and the second circulation shell has a cavity, and the cavity is used to accommodate the circulating medium.

6. The energy storage device according to claim 5, characterized in that: The first circulation assembly includes a first circulation shell, the first circulation shell is covered on the outside of the corresponding energy storage assembly, and the first circulation shell is connected to the second circulation shell to form a cavity for storing the corresponding energy storage assembly; The energy storage device also includes: a circulating medium supply assembly, the circulating medium supply assembly being in communication with both the first circulating shell and the second circulating shell, the circulating medium supply assembly being used to supply circulating medium to the first circulating shell and the second circulating shell; A heat dissipation component is arranged outside a partial structure of the circulating medium supply component, the circulating medium flows in the partial structure of the circulating medium supply component, and the heat dissipation component is used to exchange heat with the circulating medium in the partial structure of the circulating medium supply component.

7. The energy storage device according to claim 6, characterized in that: The first cycle component comprises: A circulation path is provided inside the first circulation shell, and the circulation path is used to circulate the circulation medium, wherein the circulation path extends inside the first circulation shell in a winding and / or meandering manner.

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