Battery pack and energy storage cabinet

Abstract

The utility model provides a battery pack and an energy storage cabinet, the battery pack comprises a box body, a gas fire-fighting module, a liquid fire-fighting module and a pressure relief mechanism, an accommodating space for accommodating a battery module is formed in the box body; the gas fire-fighting module is arranged on the side wall of the box body or in the accommodating space; the liquid fire-fighting module comprises a water inlet and a water outlet which are formed in the first side wall of the box body; the pressure relief mechanism is arranged on the second side wall of the box body and used for releasing the high-pressure gas in the containing space. According to the utility model, multi-medium fire-fighting protection can be carried out on the battery pack, flames are effectively extinguished, battery cells are prevented from being re-ignited, battery fire disasters are inhibited, the pressure relief mechanism is prevented from being directly impacted by inflow water in a water fire-fighting stage, and a liquid fire-fighting medium is locked in the accommodating space, so that the fire-fighting efficiency is fully exerted; and the reliability and the safety foundation of water fire fighting are further tamped.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery fire fighting technical field, concretely relates to a battery pack and energy storage cabinet. BACKGROUND

[0002] At present, the fire fighting measures for battery pack in the market mainly are single gas fire fighting medium or single liquid fire fighting medium fire extinguishing.

[0003] Although gas fire fighting medium such as heptafluoro-propane or carbon dioxide can diffuse the accommodating space in battery pack quickly and carry out oxygen isolation, but lacks direct cooling capacity, and it is difficult to block the heat release reaction in the internal battery module cell, and most of the battery internally has oxidant, and it is difficult to achieve complete fire extinguishing by relying on the suffocation principle of gas fire fighting medium.

[0004] Although liquid fire fighting medium can effectively reduce the temperature in battery pack, but it is difficult to prevent the rekindling of cell, and there is a certain fire risk, and generally, in order to ensure the safety of battery pack, a pressure relief mechanism is arranged for battery pack to release internal gas when the internal gas pressure of battery pack is too high, when liquid fire fighting medium enters battery pack, it can cause great impact on the pressure relief mechanism, so that the liquid fire fighting medium is not fully flowed in battery pack, and is discharged from the pressure relief mechanism in advance, reduces the utilization rate of liquid fire fighting medium, affects the fire fighting effect, and the liquid fire fighting medium discharged from the pressure relief mechanism can also affect other components around battery pack, and there is a safety hazard. SUMMARY

[0005] The utility model discloses a battery pack and energy storage cabinet can carry out multi-medium fire fighting protection to battery pack, realize effective fire extinguishing, prevent cell rekindling, suppress battery fire, avoid the direct impact of water on the pressure relief mechanism in the water fire fighting stage, lock liquid fire fighting medium in the accommodating space, make it give full play to the fire extinguishing efficiency, and further consolidate the reliability and safety foundation of water fire fighting.

[0006] The utility model adopts the technical scheme as follows:

[0007] A battery pack, comprising: a box body, the box body is formed with an accommodating space for accommodating battery modules;A gas fire fighting module is arranged on the side wall of the box body or in the accommodating space;A liquid fire fighting module comprises a water inlet and a water outlet arranged on the first side wall of the box body;A pressure relief mechanism is arranged on the second side wall of the box body, and the pressure relief mechanism is used to release high-pressure gas in the accommodating space.

[0008] In addition, the battery pack according to the utility model can also have the following additional technical features.

[0009] According to one embodiment of the utility model, the gas fire-fighting module comprises an integrated piercing valve, one side of the integrated piercing valve is communicated with the accommodating space, the other side of the integrated piercing valve is communicated with a gas fire-fighting pipeline, so that the gas fire-fighting medium enters the accommodating space through the gas fire-fighting pipeline and the integrated piercing valve.

[0010] According to one embodiment of the utility model, the water inlet and the water outlet are respectively arranged at the left and right ends of the first side wall, and the water outlet is higher than the water inlet.

[0011] According to one embodiment of the utility model, the water inlet is connected with a water inlet pipe, and an electromagnetic valve is arranged on the water inlet pipe; the water outlet is connected with a water outlet pipe, and a check valve is arranged on the water outlet pipe.

[0012] According to one embodiment of the utility model, the height of the pressure relief mechanism is lower than that of the water outlet, the pressure relief mechanism is a pressure relief valve with an opening valve threshold value greater than a first pressure, and the first pressure is the water pressure formed by the height difference between the water outlet and the pressure relief valve.

[0013] According to one embodiment of the utility model, the fire alarm module comprises an alarm indicator and a sensor unit, and the sensor unit is used for detecting the gas and temperature changes in the accommodating space.

[0014] According to one embodiment of the utility model, the left and right beams of the box body are hollow profiles.

[0015] According to one embodiment of the utility model, the liquid cooling plate is arranged at the bottom of the box body.

[0016] According to one embodiment of the utility model, a flow guide groove is formed in the outer surface of the top cover of the box body, and a flow guide inclined surface is arranged at the side of the flow guide groove.

[0017] In addition, the utility model also provides a kind of energy storage cabinet to realize the above-mentioned purposes.

[0018] A kind of energy storage cabinet, comprising: water inlet pipe, water outlet pipe and at least one battery pack as described above, the water inlet of each battery pack is connected with the water inlet pipe, and the water outlet of each battery pack is connected with the water outlet pipe.

[0019] The utility model has the beneficial effects that:

[0020] The battery pack of the utility model discloses a gas fire-fighting module and a liquid fire-fighting module are arranged on the box body, multi-medium fire-fighting protection for the battery pack is realized, oxygen concentration can be reduced and oxygen can be isolated in the gas fire-fighting stage, after inhibiting the combustion chain reaction, the battery temperature can be greatly reduced by the liquid fire-fighting medium in the water fire-fighting stage, the fire is effectively extinguished, the battery cell is prevented from rekindling, and the battery fire is inhibited, and moreover, the pressure relief mechanism and the liquid fire-fighting module are not located on the same side wall, the pressure relief mechanism is blocked by the battery module, cannot be directly impacted by the entering water flow, will not be forced to open, the liquid fire-fighting medium is locked in the containing space, full play is given to the fire extinguishing efficiency, and the reliability and safety foundation of the water fire-fighting are further consolidated. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the explosion map of the battery pack of the utility model embodiment;

[0022] Figure 2 It is the first side wall of the battery pack of the utility model one embodiment enlarged view;

[0023] Figure 3 It is the structure schematic view of the battery pack box body of the utility model one embodiment;

[0024] Figure 4 It is the structure schematic view of the top cover of the battery pack box body of the utility model one embodiment.

[0025] Reference signs:

[0026] 1, box body, 11, first side wall, 12, second side wall, 13, hollow section, 14, top cover, 141, flow guide groove, 142, flow guide inclined surface, 15, top cover sealing gasket, 2, gas fire-fighting module, 3, liquid fire-fighting module, 31, water inlet, 32, water outlet, 4, pressure relief mechanism, 5, battery module, 6, water inlet pipe, 61, electromagnetic valve, 7, water outlet pipe, 71, check valve, 8, fire alarm module, 9, liquid cooling plate. DETAILED DESCRIPTION

[0027] The technical scheme in the utility model embodiments will be described clearly and completely below in combination with the drawings in the utility model embodiments, and obviously, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0028] As Figure 1 And 2The utility model discloses a battery pack, including: box 1, gas fire -fighting module 2, liquid fire -fighting module 3 and pressure -relief mechanism 4, the accommodating space of accommodating battery module 5 is formed in box 1, gas fire -fighting module 2 sets up on the first side wall 11 of box 1, liquid fire -fighting module 3 includes the water inlet 31 and the water outlet 32 of setting up on the first side wall 11, pressure -relief mechanism 4 sets up on the second side wall 12 of box 1, and pressure -relief mechanism 4 is used for releasing the high pressure gas in the accommodating space.

[0029] The battery pack of the embodiment realizes multi-medium fire protection of the battery pack by setting the gas fire -fighting module 2 and the liquid fire -fighting module 3 on the box 1. In the gas fire -fighting stage, the gas fire -fighting module 2 can respond quickly, spray the gas fire -fighting medium to extinguish the fire inside the battery pack, quickly reduce the oxygen concentration, isolate the oxygen and inhibit the combustion chain reaction. If the gas fire -fighting cannot completely inhibit the fire, the liquid fire -fighting module 3 starts immediately, injects the liquid fire -fighting medium into the battery pack through the water inlet 31, quickly absorbs and takes away a large amount of heat by the high specific heat capacity characteristics of the liquid fire -fighting medium, greatly reduces the battery temperature, effectively extinguishes the flame, prevents the rekindling of the battery and inhibits the battery fire. The multi-medium fire -fighting mechanism greatly improves the reliability and safety of the fire -fighting.

[0030] Moreover, the pressure -relief mechanism 4 and the liquid fire -fighting module 3 are not on the same side wall, and the pressure -relief mechanism 4 can normally open and release the high pressure gas in the accommodating space when the pressure in the accommodating space reaches the pressure relief threshold. When the liquid fire -fighting medium is injected into the box 1, the water level in the box 1 rises, the battery module 5 is submerged for fire extinguishing, and the pressure -relief mechanism 4 is blocked by the battery module 5 and is not directly impacted by the water flow, so that the pressure -relief mechanism 4 is not forced to open and release the liquid fire -fighting medium. Instead, the liquid fire -fighting medium is locked in the accommodating space to fully exert the fire extinguishing efficiency, further consolidating the reliability and safety foundation of the water fire -fighting.

[0031] In an embodiment of the utility model, the water inlet 31 and the water outlet 32 can be respectively arranged at the left and right ends of the first side wall 11, and the water outlet 32 is higher than the water inlet 31 to form a scientific water flow path. After the liquid fire -fighting medium enters the battery pack, it flows smoothly along the gaps between the battery modules 5 to the other side of the battery pack, and as the water level rises, the battery modules 5 are fully submerged, achieving efficient fire extinguishing and battery cooling. This layout effectively avoids the problem of liquid fire -fighting medium stagnation or disorderly flow from other outlets in the battery pack, ensuring that the liquid fire -fighting medium can accurately act on the key fire extinguishing area.

[0032] As Figure 2As shown, in an embodiment of the utility model, the water inlet 31 can be externally connected with a water inlet pipe 6, the water inlet pipe 6 is equipped with a solenoid valve 61, the water outlet 32 can be externally connected with a water outlet pipe 7, the water outlet pipe 7 is equipped with a check valve 71, can ensure the one-way flow of liquid fire extinguishing medium when executing water fire extinguishing, can effectively prevent external water vapor from entering the battery pack through the pipeline, and prevent the hidden danger of battery short circuit.

[0033] In an embodiment of the utility model, the height of the pressure relief mechanism 4 is lower than the water outlet 32, the pressure relief mechanism 4 is a pressure relief valve with a valve opening threshold greater than the first pressure, and the first pressure is the water pressure formed by the height difference between the water outlet 32 and the pressure relief valve.

[0034] It can be understood that, generally, the critical air pressure of the battery pack is greater than the water pressure (i.e. the first pressure) formed by the height difference between the water outlet 32 and the pressure relief valve, and the valve opening threshold of the pressure relief valve is generally set to a fixed value less than the critical air pressure of the battery pack. If the valve opening threshold of the pressure relief valve is less than the first pressure, it may cause the liquid fire extinguishing medium to be discharged from the pressure relief valve in advance without fully flowing in the battery pack. Therefore, when the height of the pressure relief valve is lower than the water outlet 32, the valve opening threshold of the pressure relief valve is set to a preset value greater than the first pressure, which can avoid the liquid fire extinguishing medium from being discharged from the pressure relief valve, affect the fire extinguishing effect, and avoid safety hazards.

[0035] In an embodiment of the utility model not shown, the gas fire extinguishing module 2 can be an active fire extinguishing module, such as a perfluorocyclohexanone automatic fire extinguishing module arranged in the accommodation space.

[0036] However, due to the relatively high price of perfluorocyclohexanone itself, the cost of using a perfluorocyclohexanone automatic fire extinguishing module for fire extinguishing is high. In an embodiment of the utility model, the gas fire extinguishing module 2 can include an integrated piercing valve, one side of the integrated piercing valve is in communication with the accommodation space, and the other side of the integrated piercing valve is in communication with the gas fire extinguishing pipeline. Thus, low-cost fire extinguishing gas such as nitrogen and argon can be selected and stored in a fire extinguisher outside the battery pack, and when the battery pack needs to be heat controlled, it enters the accommodation space through the gas fire extinguishing pipeline and the integrated piercing valve. The integrated piercing valve can include a valve body and a puncture type driver for opening the valve body, and the present embodiment is not limited thereto.

[0037] In an embodiment of the present application, the integrated piercing valve can be arranged on any side wall of the box body 1. Preferably, the integrated piercing valve can be arranged on the first side wall 11 of the box body 1, on one hand, the integrated piercing valve, the water inlet 31 and the water outlet 32 are arranged on the same side wall, which is convenient for maintenance and unified management, and reduces the line cost; on the other hand, the integrated piercing valve can also avoid being too close to the pressure relief mechanism 4, so that when the integrated piercing valve releases the gas fire extinguishing medium, the local gas pressure rapidly rises to reach the pressure relief threshold of the pressure relief structure, so that the pressure relief structure releases part of the gas fire extinguishing medium to reduce the concentration of the gas fire extinguishing medium and reduce the fire extinguishing effect.

[0038] In an embodiment of the present application, the battery pack can further comprise a fire alarm module 8, the fire alarm module 8 can comprise an alarm indicator lamp and a sensor unit, and the sensor unit is used for detecting the gas and temperature changes in the accommodation space. Specifically, the sensor unit can comprise a carbon monoxide sensor and a temperature sensor, and the fire alarm module 8 can be signal-connected with the integrated piercing valve to transmit the control command issued by the energy storage cabinet to the integrated piercing valve. In some other embodiments of the present application, the fire alarm module 8 can further be provided with a fault indicator lamp and a power indicator lamp, which are used for displaying the working state of the battery pack and the fire alarm module 8 itself.

[0039] Generally, after the fire alarm module 8 is powered on, the alarm indicator lamp and the fault indicator lamp are in an extinguished state, and the power indicator lamp is a green light flashing; when the internal temperature of the battery pack is too high due to thermal runaway, the fire alarm module 8 monitors the gas concentration or temperature change in the battery pack to reach the alarm concentration, and the alarm indicator lamp is turned on, and an alarm signal can be transmitted to the energy storage cabinet; and an electric signal is used to start the puncture type driver in the gas fire extinguishing module 2 to open the valve, and at the same time, the fire extinguisher in the energy storage cabinet is opened, so that the fire extinguishing agent passes through the gas fire extinguishing pipeline to extinguish the fire in the battery pack, and the thermal runaway is inhibited and cooled down. After the release of the gas fire extinguishing medium, the sensor continues to monitor; then, the external liquid fire extinguishing medium can enter the thermal runaway battery pack through the water inlet pipe 6 and the water inlet 31 in the energy storage cabinet to be immersed, and after the immersion is completed, the liquid fire extinguishing medium is discharged from the battery pack through the high-position water outlet 32 of the battery pack and is discharged through the water outlet pipe 7, so as to quickly extinguish the fire source and prevent the spread of heat, and at this time, the fire extinguishing of the single-pack thermal runaway is completed.

[0040] As Figure 3As shown in the utility model in an embodiment, the left and right beams of the box body 1 can be hollow profiles 13. When thermal runaway occurs in the battery pack, the box body 1 needs to pass through the hollow profiles 13 when heat is transferred outward, and due to the presence of air in the hollow profiles 13 of the left and right beams, the heat inside the battery pack can be effectively slowed down to radiate outward to the energy storage cabinet. In some embodiments of the utility model, the outer surface of the box body 1 can also be covered with a heat-insulating refractory material. Due to the low thermal conductivity of the heat-insulating refractory material on the outer surface of the box body 1, the heat of the thermal runaway battery pack can only be concentrated in the box body 1, which can effectively limit the spread of the battery pack, and due to its fireproof property, the influence on the adjacent battery packs in the cabinet can be further reduced, which can better guarantee the safety of the product.

[0041] As shown in the utility model in an embodiment, the battery pack further comprises a liquid cooling plate 9, which is arranged at the bottom of the box body 1 and can provide heat dissipation and temperature control for the battery pack, thereby improving the performance and safety of the battery. Figure 3 As shown in the utility model in an embodiment, the outer surface of the top cover 14 of the box body 1 is provided with a flow guide groove 141, and the side of the flow guide groove 141 is provided with a flow guide slope 142. If the second battery pack above the first battery pack has a liquid leakage failure, the first battery pack can effectively drain or discharge liquid through the flow guide groove 141 and the flow guide slope 142, thereby avoiding the flow of cooling liquid or cell electrolyte to the electrical components of the lower pack body to cause short circuit, and ensuring the use function of other battery packs.

[0042] Figure 4 Specifically, the flow guide slope 142 can gradually decrease from the middle part of the top cover 14 to both sides, so that the flow guide groove 141 and the flow guide slope 142 are symmetrically arranged. When the liquid drops on the top cover, the gravity will make it flow naturally to the low place on both sides, thereby realizing the effect of uniform distribution or diversion.

[0043] To ensure the sealing of the inside of the box body, a top cover sealing gasket 15 (as shown in the utility model) can also be arranged between the top cover 14 and the side wall of the box body 1, thereby providing a top sealing effect for the battery pack. At the same time, the front end of the box body 1 can also have a plug-in panel for installing a gas fire-fighting module 2 and / or other connectors and a BMU (Battery Monitoring Unit, battery monitoring unit) panel, and the inner side surfaces of the two panels can also be provided with sealing gaskets, which cooperate with the mounting bolts to provide a front sealing effect for the battery pack, so as to ensure that the internal space of the battery pack is airtight, and the liquid fire-fighting medium will not flow out from other outlets when the water fire-fighting is started.

[0044] In addition, to achieve the above purpose, the utility model also provides an energy storage cabinet. Figure 1

[0045] In addition, to achieve the above purpose, the utility model also provides an energy storage cabinet.

[0046] ​​The energy storage cabinet according to the embodiment of the present application comprises a water inlet pipe 6, a water outlet pipe 7 and at least one battery pack as described above, the water inlet 31 of each battery pack is connected with the water inlet pipe 6, and the water outlet 32 of each battery pack is connected with the water outlet pipe 7. When the gas fire-fighting module 2 of the battery pack comprises an integrated piercing valve, the energy storage cabinet can further comprise a gas fire-fighting pipeline, so that the gas fire-fighting medium enters the battery pack through the gas fire-fighting pipeline and the integrated piercing valve.

[0047] The energy storage cabinet according to the embodiment of the present application has the beneficial effects of the battery pack as described above.

[0048] In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly specified and limited.

[0049] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction between two elements.

[0050] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A battery pack, characterized in that, include: The housing (1) has a space for accommodating the battery module (5). Gas fire suppression module (2), wherein the gas fire suppression module (2) is disposed on the side wall of the housing (1) or within the accommodating space; Liquid fire-fighting module (3), the liquid fire-fighting module (3) includes an inlet (31) and an outlet (32) disposed on the first side wall (11) of the box (1); Pressure relief mechanism (4) is provided on the second side wall (12) of the housing (1) and is used to release the high pressure gas in the containment space.

2. The battery pack according to claim 1, characterized in that, The gas fire suppression module (2) includes an integrated puncture valve. One side of the integrated puncture valve is connected to the accommodating space, and the other side of the integrated puncture valve is connected to the gas fire suppression pipeline, so that the gas fire suppression medium enters the accommodating space through the gas fire suppression pipeline and the integrated puncture valve.

3. The battery pack according to claim 1, characterized in that, The inlet (31) and outlet (32) are respectively located at the left and right ends of the first sidewall (11), and the outlet (32) is higher than the inlet (31).

4. The battery pack according to claim 1, characterized in that, The inlet (31) is connected to an inlet pipe (6), and the inlet pipe (6) is equipped with a solenoid valve (61). The outlet (32) is connected to an outlet pipe (7), and the outlet pipe (7) is equipped with a one-way valve (71).

5. The battery pack according to claim 1, characterized in that, The height of the pressure relief mechanism (4) is lower than that of the outlet (32). The pressure relief mechanism (4) is a pressure relief valve with an opening threshold greater than a first pressure. The first pressure is the water pressure formed by the height difference between the outlet (32) and the pressure relief valve.

6. The battery pack according to claim 1, characterized in that, Also includes: The fire alarm module (8) includes an alarm indicator light and a sensor unit, which is used to detect gas and temperature changes in the containment space.

7. The battery pack according to claim 1, characterized in that, The left and right beams of the box body (1) are hollow profiles (13).

8. The battery pack according to claim 1, characterized in that, Also includes: Liquid cooling plate (9) is disposed at the bottom of the housing (1).

9. The battery pack according to claim 1 or 8, characterized in that, The top cover (14) of the box (1) has a flow guide groove (141) on its outer surface, and the flow guide groove (141) has a flow guide slope (142) on its side.

10. An energy storage cabinet, characterized in that, include: The battery pack includes an inlet pipe (6), an outlet pipe (7), and at least one battery pack as described in any one of claims 1-9, wherein the inlet (31) of each battery pack is connected to the inlet pipe (6), and the outlet (32) of each battery pack is connected to the outlet pipe (7).

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