Base plate, fire protection structure, fire protection cooling integrated structure, battery pack and energy storage battery system

Abstract

The utility model provides a kind of base plate, fire-fighting structure of battery pack, fire-fighting cooling integrated structure, battery pack and energy storage battery system.The fire-fighting structure includes base plate, the base plate includes fire extinguishing agent inlet, fire extinguishing agent flow channel communicated with the fire extinguishing agent inlet and multiple fire extinguishing agent nozzles set on the fire extinguishing agent flow channel, multiple fire extinguishing agent nozzles are interval set along the extension direction of the fire extinguishing agent flow channel.According to the utility model, the uniformity of fire extinguishing agent diffusion can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, and more specifically, to a base plate, a fire protection structure for a battery pack, an integrated fire protection and cooling structure for a battery pack, a battery pack, and an energy storage battery system. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage power stations, the cell integration density of energy storage systems is becoming increasingly higher. However, batteries are prone to thermal runaway under abnormal conditions such as overcharging, short circuits, or mechanical damage, which can trigger a chain of exothermic reactions and lead to fires and explosions. Therefore, current energy storage systems are facing safety challenges brought about by the high-density integration of cells.

[0003] Existing external fire suppression systems pose a triple risk of failure. First, traditional external fire suppression systems suffer from response delays, with activation times exceeding 350ms, failing to prevent the chain reaction that begins in the early stages of thermal runaway. Second, existing systems have coverage blind spots, with extinguishing agent diffusion uniformity within modules less than 65%, creating protective vacuum zones with localized temperature rises exceeding 200°C. Third, existing systems have low coupling, with the thermal management system and fire suppression system designed separately, resulting in an energy density loss of approximately 12-15%. Utility Model Content

[0004] One objective of this utility model is to provide a base plate, a fire protection structure, a fire protection cooling integrated structure, a battery pack, and an energy storage battery system.

[0005] One objective of this invention is to provide a substrate plate, a fire protection structure, an integrated fire cooling structure, a battery pack, and an energy storage battery system that can improve the uniformity of fire extinguishing agent diffusion.

[0006] Another objective of this utility model is to provide a base plate, a fire protection structure, a fire cooling integrated structure, a battery pack, and an energy storage battery system that can realize the coupling of a thermal management system and a fire protection system.

[0007] According to one aspect of the present invention, a fire protection structure for a battery pack is provided. The fire protection structure includes a base plate, the base plate including a fire extinguishing agent inlet, a fire extinguishing agent flow channel communicating with the fire extinguishing agent inlet, and a plurality of fire extinguishing agent nozzles disposed on the fire extinguishing agent flow channel, the plurality of fire extinguishing agent nozzles being spaced apart along the extension direction of the fire extinguishing agent flow channel.

[0008] Optionally, the extinguishing agent channel extends inside the substrate plate and has a protruding structure that protrudes from the upper surface of the substrate plate.

[0009] Optionally, the extinguishing agent channels are arranged along the edge of the substrate plate, and / or the extinguishing agent channels are arranged in rows and / or columns on the inner side of the substrate plate.

[0010] Optionally, the extinguishing agent nozzle is a mechanical micro-valve nozzle or a piezoelectric micro-valve nozzle.

[0011] According to another aspect of the present invention, a fire-fighting cooling integrated structure for a battery pack is provided. The fire-fighting cooling integrated structure includes the fire-fighting structure as described above. The fire-fighting cooling integrated structure further includes a coolant inlet, a coolant outlet, and a coolant flow channel communicating between the coolant inlet and the coolant outlet. The coolant flow channel is disposed on the side of the base plate opposite to the fire extinguishing agent flow channel and is spaced apart from the fire extinguishing agent flow channel.

[0012] Optionally, the coolant channel extends inside the base plate and has a protruding structure that protrudes beyond the lower surface of the base plate.

[0013] Optionally, the extinguishing agent inlet, the coolant inlet, and the coolant outlet are located on the outer periphery of the base plate.

[0014] According to another aspect of the present invention, a battery pack is provided, the battery pack comprising at least two battery modules, and the battery pack further comprising the fire protection structure as described above or the fire protection cooling integrated structure as described above.

[0015] Optionally, the at least two battery modules and the fire extinguishing agent channel are located on the same side of the substrate plate.

[0016] Optionally, the extinguishing agent flow channel is provided along the gap between the at least two battery modules, and / or along the outer periphery of the at least two battery modules.

[0017] Optionally, the battery pack further includes a fire sensor for collecting at least one of voltage, temperature, and gas production.

[0018] Optionally, the battery module includes multiple battery cells connected in parallel or series with each other and an integrated busbar, and the fire sensor is disposed in the integrated busbar.

[0019] Optionally, the battery pack further includes a signal collector that is wired or wirelessly connected to the integrated busbar of each battery module, and the signal collector is also wired or wirelessly connected to the controller.

[0020] According to another aspect of the present invention, an energy storage battery system is provided, the energy storage battery system comprising the battery pack as described above.

[0021] According to another aspect of the present invention, a base plate is provided, the base plate including a fire extinguishing agent inlet and a fire extinguishing agent flow channel communicating with the fire extinguishing agent inlet, the fire extinguishing agent flow channel being disposed on a first surface of the base plate or disposed inside the base plate.

[0022] Optionally, the extinguishing agent flow channel is provided with multiple extinguishing agent nozzle interfaces, which are spaced apart along the extension direction of the extinguishing agent flow channel.

[0023] Optionally, the base plate further includes a coolant inlet, a coolant outlet, and a coolant flow channel communicating between the coolant inlet and the coolant outlet, the coolant flow channel being spaced apart from the fire extinguishing agent flow channel.

[0024] Optionally, the coolant flow channel is disposed on the second surface of the base plate opposite to the first surface or inside the base plate.

[0025] According to this invention, the uniformity of fire extinguishing agent diffusion can be improved.

[0026] According to this utility model, the response time of the fire protection system can be reduced.

[0027] According to this invention, fire extinguishing agent is sprayed at the module level to extend the thermal runaway propagation time window and reduce system operating energy consumption.

[0028] According to this utility model, deep coupling between the liquid cooling system and the fire protection system is achieved, thereby improving energy density. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a portion of a battery pack based on existing technology.

[0030] Figure 2 yes Figure 1 A schematic diagram of the lower surface of the liquid cooling plate shown.

[0031] Figure 3 yes Figure 1 A schematic diagram of the upper surface of the liquid cooling plate shown.

[0032] Figure 4 This is a schematic diagram of a battery pack according to an embodiment of the present invention.

[0033] Figure 5 yes Figure 4 A schematic diagram of the upper surface of the substrate plate shown.

[0034] Figure 6 yes Figure 5 An enlarged view of part P.

[0035] Figure 7 Is Figure 6 A schematic diagram showing the spraying of extinguishing agent after placing the battery cell on the substrate.

[0036] Figure 8 and Figure 9 yes Figure 5 Examples of variations.

[0037] Figures 10 to 12 They are Figure 5 , Figure 8 and Figure 9 A schematic diagram showing the installation state of the substrate plate in the battery pack.

[0038] Figure 13 This is a schematic diagram of the lower surface of the substrate plate according to an embodiment of the present invention.

[0039] Label Names: 10-Battery Pack, 11-Liquid Cooling Plate, 11a-Upper Surface, 11b-Lower Surface, 11c-Coolant Flow Channel, 12-Battery Module, 100-Battery Pack, 110-Battery Module Integration, 111-Battery Module, 111a-Battery Cell, 120-Base Plate, 120a-Upper Surface, 120b-Lower Surface, 121-Fire Extinguishing Agent Inlet, 122-Fire Extinguishing Agent Flow Channel, 123-Fire Extinguishing Agent Nozzle, 124-Fire Extinguishing Agent, 125-Coolant Inlet, 126-Coolant Outlet, 127-Coolant Flow Channel, 140-Integrated Busbar, 150-Signal Collector, 160-Controller Detailed Implementation

[0040] 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.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0042] To more easily understand the technical solution and its effects, first refer to... Figures 1 to 3 Describes a battery pack based on existing technology and the liquid cooling plate therein. Figure 1 This is a schematic diagram of a portion of a battery pack based on existing technology. Figure 2 yes Figure 1 A schematic diagram of the back of the liquid cooling plate shown. Figure 3 yes Figure 1A schematic diagram of the front of the liquid cooling plate shown.

[0043] like Figure 1 As shown, the battery pack 10 according to the prior art may include a liquid cooling plate 11 and a battery module 12 disposed on the liquid cooling plate 11. The battery module 12 is formed by multiple battery cells connected in parallel or series. Figure 2 As shown, the lower surface 11b of the liquid cooling plate 11 has coolant channels 11c for cooling the battery module 12. Furthermore, as... Figure 3 As shown, the upper surface 11a of the liquid cooling plate 11 is a flat plate structure without any flow channels, and the battery cells of the battery module 12 are uniformly fixed on the upper surface 11a of the liquid cooling plate 11. In the prior art, the fire protection system is external; however, external fire protection systems have problems such as response delay, uneven diffusion of extinguishing agent, and energy density loss.

[0044] Embodiments of this utility model provide a fire-fighting structure, a fire-fighting cooling integrated structure for a battery pack, a battery pack, and an energy storage battery system that can solve at least one of the above problems. Hereinafter, refer to... Figures 4 to 13 Description of embodiments according to the present invention.

[0045] Figure 4 This is a schematic diagram of a battery pack according to an embodiment of the present invention. Figure 5 yes Figure 4 A schematic diagram of the upper surface of the substrate plate shown. Figure 6 yes Figure 5 An enlarged view of part P. Figure 7 Is Figure 6 A schematic diagram showing the spraying of extinguishing agent after placing the battery cell on the substrate. Figure 8 and Figure 9 yes Figure 5 Examples of variations. Figures 10 to 12 They are Figure 5 , Figure 8 and Figure 9 A schematic diagram showing the installation state of the substrate plate in the battery pack. Figure 13 This is a schematic diagram of the lower surface of the substrate plate according to an embodiment of the present invention.

[0046] According to embodiments of the present invention, such as Figure 4 As shown, the battery pack 100 may include a battery module assembly 110. The battery module assembly 110 may include at least two battery modules 111 spaced apart from each other. Figure 4The battery module assembly 110 shown includes four battery modules 111; however, the present invention is not limited thereto. The battery module assembly 110 may include only two battery modules 111, or it may include three or more battery modules 111. Additionally, each battery module 111 may include two or more cells 111a connected in parallel or series (e.g., ...). Figure 7 (As shown).

[0047] The battery pack 100 may also include a fire-fighting structure. According to an embodiment of the present invention, the fire-fighting structure may include a base plate 120. A battery module assembly 110 may be disposed on the base plate 120, and the side of the base plate 120 facing the battery module assembly 110 is the upper surface 120a of the base plate 120. That is, the battery module 111 and the fire extinguishing agent flow channel 122 may be disposed on the same side of the base plate 120.

[0048] like Figure 5 As shown, the substrate plate 120 may include an extinguishing agent inlet 121 and an extinguishing agent flow channel 122 communicating with the extinguishing agent inlet 121. The extinguishing agent flow channel 122 may be disposed on the upper surface 120a (or the first surface) of the substrate plate 120 or disposed inside the substrate plate 120. According to an embodiment of the present invention, the extinguishing agent flow channel 122 is provided with a plurality of extinguishing agent nozzle interfaces, which are spaced apart along the extension direction of the extinguishing agent flow channel 122. A plurality of extinguishing agent nozzles 123 may be respectively installed to the plurality of extinguishing agent nozzle interfaces. The substrate plate 120 including the extinguishing agent flow channel 122 according to the present invention can at least solve the problem of being able to be used for fire extinguishing in the event of thermal runaway. In addition, according to the present invention, since a plurality of extinguishing agent nozzle interfaces for installing a plurality of extinguishing agent nozzles 123 are spaced apart along the extension direction of the extinguishing agent flow channel 122, the problem of uneven extinguishing agent diffusion can at least be solved.

[0049] According to embodiments of this utility model, the material of the base plate 120 is not specifically limited, as long as it allows for the provision of the extinguishing agent flow channel 122 and the installation of the extinguishing agent nozzle 123. For example, the base plate 120 can be a metal plate. The shape and size of the base plate 120 are also not specifically limited, and can be, for example... Figure 5 The rectangular plate or other shaped plate shown. Additionally, although... Figure 4 The substrate plate 120 shown is disposed at the bottom of the battery module integration 110, but the present invention is not limited thereto. The substrate plate 120 may also be disposed at the side or top of the battery module integration 110, etc., without specific limitation.

[0050] According to an embodiment of this utility model, for structural simplification and ease of processing, the extinguishing agent inlet 121 can be located at the edge of the base plate 120. Figure 5The extinguishing agent inlet 121 shown is located at the center of the outer periphery of the base plate 120. However, the present invention is not specifically limited. For example, the extinguishing agent inlet 121 may be located at other locations (e.g., the center of the base plate 120) as needed.

[0051] The extinguishing agent flow channel 122 is connected to the extinguishing agent inlet 121. According to embodiments of the present invention, the extinguishing agent flow channel 122 can have various forms and can be formed using various flow channel forming methods commonly used in the art, as long as a closed flow channel can be formed and an extinguishing agent nozzle 123 can be installed thereon. For example, the extinguishing agent flow channel 122 can be formed by processes such as pipe embedding, stamping, material reduction, and welding. Considering economic efficiency, stamping is preferred for forming the extinguishing agent flow channel 122. For example, a groove for forming the extinguishing agent flow channel 122 can be stamped into a stamping plate, and then the stamping plate can be welded to one side of the base plate, thereby forming the extinguishing agent flow channel 122 between the base plate and the stamping plate. However, the method of forming the extinguishing agent flow channel 122 is not limited to this. According to embodiments of the present invention, the extinguishing agent flow channel 122 can also be disposed on the surface of the base plate 120 (e.g., the upper surface 120a) by processes such as welding. According to an embodiment of the present invention, the extinguishing agent flow channel 122 can be disposed inside the base plate 120, that is, it can extend inside the base plate 120. As an example, the extinguishing agent flow channel 122 can have a protruding structure protruding from the upper surface 120a of the base plate 120 (e.g., Figure 6 (As shown).

[0052] Additionally, the extinguishing agent flow channels 122 may be arranged in rows and / or columns on the inner side of the base plate 120. For example... Figure 5 and Figure 6 As shown, the extinguishing agent flow channel 122 can be configured as a row and a column on the inner side of the base plate 120, that is, it can form a cross shape. The rows and columns of extinguishing agent flow channels 122 can intersect each other, so that the extinguishing agent flowing into the extinguishing agent flow channel 122 from the extinguishing agent inlet 121 can diffuse along the rows and columns. The extinguishing agent flow channel 122 can also be configured as only one row or one column communicating with the extinguishing agent flow channel 122. For example, as Figure 9 As shown, the extinguishing agent flow channel 122 forms only one row on the inner side of the substrate plate 120. Alternatively, the extinguishing agent flow channel 122 may form at least two rows and / or at least two columns.

[0053] Furthermore, the extinguishing agent flow channel 122 may also be provided along the edge of the base plate 120. For example... Figure 8 and Figure 9 As shown, the extinguishing agent channel 122 surrounds the entire outer periphery of the base plate 120, forming a closed shape. However, the extinguishing agent channel 122 may not surround the entire outer periphery of the base plate 120, that is, it may only surround a portion of the outer periphery of the base plate 120.

[0054] According to an embodiment of the present invention, multiple extinguishing agent nozzles 123 can be spaced apart along the extension direction of the extinguishing agent flow channel 122. The extinguishing agent nozzles 123 can be fixed to the extinguishing agent flow channel 122 by means of, for example, threaded connection. The spacing between adjacent extinguishing agent nozzles 123 is not specifically limited, but can be reasonably arranged according to the spraying area of ​​the extinguishing agent nozzles 123.

[0055] According to embodiments of this utility model, the extinguishing agent nozzle 123 can be a mechanical micro-valve nozzle (or micro-valve head or micro-nozzle) or a piezoelectric micro-valve nozzle. A mechanical micro-valve nozzle refers to a nozzle in which the extinguishing agent 124 (such as...) is applied. Figure 7 As shown, the extinguishing agent can be directly sprayed out when flowing through the extinguishing agent channel 122, and is controlled by a single switch. Therefore, using a mechanical micro-valve nozzle, full-area coverage of the extinguishing agent can be achieved through a single switch.

[0056] Piezoelectric microvalve nozzles can be, for example, piezoelectric ceramic microvalve nozzles. These nozzles utilize materials such as piezoelectric ceramics, which undergo minute deformations when an electric field is applied, thereby altering the opening and closing state of the nozzle's fluid channels. In other words, piezoelectric microvalve nozzles can be individually controlled. Therefore, piezoelectric microvalve nozzles can achieve precise control of the spraying area. For example, they can respond to specific areas of thermal runaway within a battery pack by opening nozzles in those areas, thus achieving precise fire suppression in the thermal runaway zone.

[0057] According to an embodiment of the present invention, the orifice diameter of the extinguishing agent nozzle 123 may be less than 2 mm; however, the orifice diameter is not limited to this.

[0058] According to an embodiment of this invention, the extinguishing agent is perfluorohexanone. Perfluorohexanone is stored as a liquid in pipelines at room temperature. When a thermal runaway occurs and the temperature inside the battery pack becomes high, it is sprayed out through the extinguishing agent nozzle 123, where it absorbs heat and vaporizes into a gaseous state. Perfluorohexanone is insulating, non-toxic, and does not damage the battery cell. However, the extinguishing agent is not limited to perfluorohexanone; other extinguishing agents with the same or similar properties can also be used.

[0059] According to embodiments of the present invention, such as Figure 10 As shown, the extinguishing agent flow channel 122 can be arranged along the gap between at least two battery modules 111, and / or along the outer edge of at least two battery modules 111. That is, the extension path of the extinguishing agent flow channel 122 can be adjusted according to the arrangement of the battery modules 111. For example, Figure 10 The battery pack 100 shown has four battery modules 111, and the extinguishing agent flow channel 122 can form a cross shape along the gap between the battery modules 111. Figure 11 In the middle, the fire extinguishing agent flow channel 122 can further surround the outer edge of all battery modules 111. Figure 12The battery pack 100 shown has two battery modules 111, and the extinguishing agent channels 122 can be arranged in a row along the gaps between the battery modules 111, and optionally further around the outer edge of the battery pack 100. When the battery modules 111 in the battery pack 100 are arranged in other ways, the extinguishing agent channels 122 can be arranged similarly according to this principle. According to the present invention, when the extinguishing agent channels 122 are arranged along the gaps between the battery modules 111 and / or along the outer edge of all the battery modules 111, the extinguishing agent 124 can be smoothly sprayed from the extinguishing agent channels 122 without being blocked by the battery cells 111a.

[0060] Return to reference Figure 4 According to an embodiment of the present invention, the battery pack 100 may further include a fire sensor for sensing fire data, the fire sensor being used to collect at least one of voltage, temperature, and gas production. Each battery module 111 may be provided with an integrated busbar 140, which is a core electrical connection component within the battery module, enabling the series and parallel connection of battery cells and the collection of cell voltage, temperature, or gas production. Therefore, according to an embodiment of the present invention, the fire sensor may be disposed in the integrated busbar 140.

[0061] Reference Figure 4 According to an embodiment of this utility model, the battery pack further includes a signal collector 150, which is wired or wirelessly connected to the integrated busbar 140 of each battery module 111, and also wired or wirelessly connected to a controller 160. That is, fire protection data from the integrated busbar 140 of each battery module 111 can be collected to the signal collector 150 via wired or wireless means. The signal collector 150 can then transmit this fire protection data to the controller 160 via wired or wireless means. As an example, the controller 160 can be integrated into a battery and fire protection integrated early warning system of the battery pack.

[0062] When the extinguishing agent nozzle 123 uses a mechanical micro-orifice nozzle, a three-dimensional coverage spray can be achieved. When the controller 160 detects thermal runaway characteristics (temperature increase / voltage increase / gas production increase) in the battery cell, the controller 160 can send a control signal to the signal collector 150. The signal collector 150 can control the opening of the valve in the pipeline storing the extinguishing agent. The extinguishing agent enters the extinguishing agent flow channel 122 through the extinguishing agent inlet 121, and then achieves a three-dimensional coverage spray through all the extinguishing agent nozzles 123. According to this invention, all the extinguishing agent nozzles 123 can be activated within 20ms, and a three-dimensional coverage spray can be achieved through the micro-orifice nozzle.

[0063] When the extinguishing agent nozzle 123 uses a piezoelectric micro-valve nozzle, precise control of the spraying area can be achieved. When the controller 160 detects thermal runaway characteristics (temperature increase / voltage increase / gas production increase) in a certain area, the controller 160 can send a control signal to the signal collector 150. The signal collector 150 can send a control command to the target area through the integrated busbar 140, triggering the activation of the extinguishing agent nozzle 123. The extinguishing agent enters the extinguishing agent flow channel 122 through the extinguishing agent inlet 121, and then is precisely sprayed into the area through the extinguishing agent nozzle 123. For example, the integrated busbar 140 can activate the piezoelectric micro-valve nozzle at the corresponding coordinate within 12ms.

[0064] According to an embodiment of the present invention, the base plate 120 can be disposed at the bottom of the battery module assembly 110, and the base plate 120 can be used as an integrated plate for fire protection and cooling, as described in detail below.

[0065] According to an embodiment of this utility model, a fire-fighting cooling integrated structure for a battery pack can also be provided. This fire-fighting cooling integrated structure may include the fire-fighting structure with a base plate 120 as described above. In addition to achieving fire-fighting functionality, the fire-fighting cooling integrated structure also integrates cooling functionality. Specifically, this utility model simultaneously achieves fire-fighting and cooling functions through the base plate 120.

[0066] like Figure 4 and Figure 13 As shown, the fire-fighting cooling integrated structure may further include a coolant inlet 125, a coolant outlet 126, and a coolant flow channel 127 connecting the coolant inlet 125 and the coolant outlet 126, wherein the coolant flow channel 127 is spaced apart from the extinguishing agent flow channel 122. The coolant flow channel 127 may be disposed on the second surface (lower surface 120b) of the base plate 120 opposite to the first surface (upper surface 120a) or disposed inside the base plate 120.

[0067] like Figure 5 As shown, as an example, the coolant inlet 125 and coolant outlet 126 may also be located on the outer periphery of the base plate 120, for example, on both sides of the extinguishing agent inlet 121. However, the present invention is not limited thereto.

[0068] Similar to the extinguishing agent flow channel 122, the coolant flow channel 127 extends inside the base plate 120 and has a protruding structure protruding from the lower surface 120b of the base plate 120. As an example, the coolant flow channel 127 can also be formed by processes such as pipe embedding, stamping, and subtractive processing. Considering economic efficiency, stamping is preferred for forming the coolant flow channel 127. For example, a groove can be stamped into another stamping plate, and then this other stamping plate can be welded to the other side of the base plate as described above (a stamping plate with the extinguishing agent flow channel is welded to one side of the base plate), thereby forming the extinguishing agent flow channel 122 between the base plate and the stamping plate. However, the method of forming the coolant flow channel 127 is not limited to this. According to embodiments of the present invention, the coolant flow channel 127 can be provided on the other surface (e.g., the lower surface 120b) of the base plate 120 by processes such as welding.

[0069] The coolant flow channel 127 may meander between the coolant inlet 125 and the coolant outlet 126 to increase the cooling area. The specific extension shape of the coolant flow channel 127 is not limited.

[0070] According to this utility model, the thermal management system and the fire protection system can be coupled, which is beneficial to improving energy density.

[0071] According to another embodiment of the present invention, an energy storage battery system including the battery pack described above can also be provided.

[0072] According to this utility model, beneficial technical effects, not limited to those described below, can be achieved.

[0073] According to the fire protection structure of this utility model, the uniformity of fire extinguishing agent diffusion can be improved, for example, it can effectively cover 98.5% of the surface of the battery cell.

[0074] According to the fire protection structure of this utility model, the response time of the fire protection system can be reduced. For example, the diffusion time of the extinguishing agent can be shortened to 1 / 7 of that of the traditional fire protection pipeline.

[0075] According to the fire protection structure of this utility model, fire extinguishing agent is sprayed at the module level, which prolongs the thermal runaway propagation time window and reduces the system's operating energy consumption. For example, the thermal runaway propagation time window can be extended by 4 times compared to conventional external fire protection devices, and the system's operating energy consumption is reduced by 67% compared to traditional external fire protection devices.

[0076] According to the fire protection structure of this utility model, the liquid cooling system and the fire protection system are deeply coupled, thereby improving the energy density.

[0077] Although exemplary embodiments of the present invention have been specifically described with reference to exemplary embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made thereto without departing from the spirit and scope of the present invention as defined by the claims.

Claims

1. A fire-fighting structure for a battery pack, characterized in that, The fire protection structure includes a base plate (120), the base plate (120) includes an extinguishing agent inlet (121), an extinguishing agent flow channel (122) communicating with the extinguishing agent inlet (121), and a plurality of extinguishing agent nozzles (123) disposed in the extinguishing agent flow channel (122), the plurality of extinguishing agent nozzles (123) being spaced apart along the extension direction of the extinguishing agent flow channel (122).

2. The fire-fighting structure of the battery pack according to claim 1, characterized in that, The extinguishing agent channel (122) extends inside the base plate (120) and has a protruding structure that protrudes from the upper surface (120a) of the base plate (120).

3. The fire-fighting structure of the battery pack according to claim 2, characterized in that, The extinguishing agent channel (122) is provided along the edge of the base plate (120), and / or The extinguishing agent channels (122) are arranged in rows and / or columns on the inner side of the substrate plate (120).

4. The fire-fighting structure of the battery pack according to any one of claims 1 to 3, characterized in that, The extinguishing agent nozzle (123) is a mechanical micro-orifice nozzle or a piezoelectric micro-valve nozzle.

5. A fire-fighting cooling integrated structure for a battery pack, characterized in that, The fire-fighting cooling integrated structure includes a fire-fighting structure according to any one of claims 1 to 4. The fire-fighting cooling integrated structure further includes a coolant inlet (125), a coolant outlet (126), and a coolant flow channel (127) communicating between the coolant inlet (125) and the coolant outlet (126). The coolant flow channel (127) is disposed on the side of the base plate (120) opposite to the extinguishing agent flow channel (122) and spaced apart from the extinguishing agent flow channel (122).

6. The integrated fire-fighting cooling structure for the battery pack according to claim 5, characterized in that, The coolant channel (127) extends inside the base plate (120) and has a protruding structure that protrudes from the lower surface (120b) of the base plate (120).

7. The integrated fire-fighting cooling structure for the battery pack according to claim 5, characterized in that, The extinguishing agent inlet (121), the coolant inlet (125), and the coolant outlet (126) are located on the outer periphery of the base plate (120).

8. A battery pack, the battery pack (100) comprising at least two battery modules (111), characterized in that, The battery pack (100) further includes a fire protection structure according to any one of claims 1 to 4 or a fire-fighting cooling integrated structure according to any one of claims 5 to 7.

9. The battery pack according to claim 8, characterized in that, The at least two battery modules (111) and the fire extinguishing agent channel (122) are located on the same side of the base plate (120).

10. The battery pack according to claim 8 or 9, characterized in that, The extinguishing agent channel (122) is provided along the gap between the at least two battery modules (111) and / or along the outer periphery of the at least two battery modules (111).

11. The battery pack according to claim 8 or 9, characterized in that, The battery pack (100) also includes a fire sensor for collecting at least one of voltage, temperature and gas production.

12. The battery pack according to claim 11, characterized in that, The battery module (111) includes multiple battery cells (111a) connected in parallel or in series with each other and an integrated busbar (140), and the fire sensor is disposed in the integrated busbar (140).

13. The battery pack according to claim 12, characterized in that, The battery pack also includes a signal collector (150) which is wired or wirelessly connected to the integrated busbar (140) of each battery module (111) and is also wired or wirelessly connected to the controller.

14. An energy storage battery system, characterized in that, The energy storage battery system includes a battery pack according to any one of claims 8 to 13.

15. A substrate plate, characterized in that, The substrate plate (120) includes an extinguishing agent inlet (121) and an extinguishing agent flow channel (122) communicating with the extinguishing agent inlet (121). The extinguishing agent flow channel (122) is disposed on the first surface of the substrate plate (120) or disposed inside the substrate plate (120).

16. The substrate plate according to claim 15, characterized in that, The extinguishing agent flow channel (122) is provided with multiple extinguishing agent nozzle interfaces, which are spaced apart along the extension direction of the extinguishing agent flow channel (122).

17. The substrate plate according to claim 15, characterized in that, The base plate (120) also includes a coolant inlet (125), a coolant outlet (126), and a coolant flow channel (127) connecting the coolant inlet (125) and the coolant outlet (126), the coolant flow channel (127) being spaced apart from the fire extinguishing agent flow channel (122).

18. The substrate plate according to claim 17, characterized in that, The coolant flow channel (127) is disposed on the second surface of the base plate (120) opposite to the first surface or disposed inside the base plate (120).

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