Charging and battery swap station and cooling fire-fighting control method for charging and battery swap station

Abstract

The invention provides a charging and battery swap station and a cooling fire control method for the charging and battery swap station. The charging and battery swapping station comprises a battery swapping cabinet and a charging and battery swapping platform. The battery changing cabinet comprises a water tank and m rows and n columns of battery cabins, wherein m and n are positive integers not less than 1; a battery pack is placed in the battery cabin; the battery charging and replacing platform comprises a charging module, a liquid cooling module and an air cooling module. The cold / heat storage of the water in the water tank is used for controlling the temperature of the battery during discharging, an additional cooling / heating device does not need to be arranged in the battery replacing cabinet, the weight of the battery replacing cabinet is reduced, the energy consumption of temperature control of the battery pack is reduced, and the cargo capacity of the electric vehicle is conveniently improved.

Description

Technical Field

[0001] This application relates to the technical field of charging and swapping stations. Specifically, this application relates to a charging and swapping station and a cooling and fire control method for a charging and swapping station. Background Art

[0002] Charging and swapping stations have been widely installed and applied in densely populated areas such as communities, schools, shopping malls, gas stations, hotels, and hospitals to facilitate the charging or swapping of electric vehicles.

[0003] Traditional battery packs have problems such as long charging time and high safety risks. Especially when the battery pack is fast-charged, the cooling rate of the battery pack cannot keep up with the heat generation rate during fast charging, which will cause the battery pack temperature to be high and pose a major safety hazard. Therefore, it is particularly important to develop a battery pack and a cooling and fire control system with efficient heat dissipation and temperature reduction. Summary of the Invention

[0004] In view of the shortcomings of the existing methods, this application proposes a charging and swapping station and a cooling and fire control method for a charging and swapping station to solve technical problems such as potential safety hazards caused by excessively high temperatures during fast charging of battery packs, high cooling energy consumption, or large equipment weight.

[0005] In a first aspect, an embodiment of this application provides a charging and swapping station, including:

[0006] A swapping cabinet, including a water tank and a battery compartment with battery packs arranged in m rows and n columns below the water tank, where both m and n are positive integers not less than 1;

[0007] A charging and swapping platform, including a charging module, a liquid cooling module, and an air cooling module; the charging module is electrically connected to each of the battery packs; the liquid cooling module includes a water pool, an air-cooling / liquid-cooling integrated machine, a liquid supply water pump, a main water inlet pipe, a first water inlet branch pipe, a second water inlet branch pipe, a first main return pipe, a second main return pipe, and a return branch pipe; the water pool is connected to the air-cooling / liquid-cooling integrated machine, the water pool is communicated with one end of the main water inlet pipe through the liquid supply water pump, the other end of the main water inlet pipe is respectively communicated with the first water inlet branch pipe and the second water inlet branch pipe through a three-way valve, the first water inlet branch pipe is communicated with the water tank, the second water inlet branch pipe is communicated with the water inlet branch pipes of the battery packs in m rows and n columns after passing through a first one-way valve; the battery packs in m rows and n columns are communicated with the return branch pipe through the battery pack return port branch pipes in m rows and n columns, the return branch pipe is communicated with the water tank after passing through a first control valve, the water tank is communicated with the air-cooling / liquid-cooling integrated machine through a second control valve and the first main return pipe; the air-cooling / liquid-cooling integrated machine is communicated with the water pool through the second main return pipe.

[0008] The air-cooling module includes a high-pressure nitrogen cylinder, a third control valve, a liquid nitrogen tank, an evaporator, a ventilation main pipe, a first ventilation branch pipe, and a second ventilation branch pipe arranged in m rows and n columns, which are connected in sequence. The evaporator is communicated with the water tank through the ventilation main pipe and the first ventilation branch pipe, and the evaporator is communicated with each battery pack through the ventilation main pipe and the second ventilation branch pipes arranged in m rows and n columns.

[0009] In a second aspect, an embodiment of the present application provides a cooling and fire control method for the charging and swapping station described in the first aspect, including:

[0010] Obtain the external ambient temperature through a first temperature probe, obtain the temperature of the water pool and / or the water tank through a second temperature probe, and obtain the temperature of the battery pack through a third temperature probe.

[0011] When the swapping cabinet is charging:

[0012] When the temperatures of the first temperature probe, the second temperature probe, and the third temperature probe are within a first threshold range, start the air-cooling machine in the air-cooling / liquid-cooling integrated machine to exchange heat with the environment to cool the water in the water pool; control the three-way valve, and through the liquid supply water pump, exchange heat of the water in the water pool with the water in the water tank, or directly cool the battery pack by the water pool.

[0013] When the temperatures of the first temperature probe, the second temperature probe, and the third temperature probe are within a second threshold range, start the compression refrigeration in the air-cooling / liquid-cooling integrated machine to cool the water in the water pool; control the three-way valve, and through the liquid supply water pump, exchange heat of the water in the water pool with the water in the water tank, or directly cool the battery pack by the water pool; where the second threshold is greater than the first threshold.

[0014] When the temperatures of the first temperature probe, the second temperature probe, and the third temperature probe are within a third threshold range, start the compression refrigeration in the air-cooling / liquid-cooling integrated machine to cool the water in the water pool; control the three-way valve, and through the liquid supply water pump, exchange heat of the water in the water pool with the water in the water tank, or directly cool the battery pack by the water pool; at the same time, open the third control valve to spray low-temperature nitrogen or liquid nitrogen into the battery pack to accelerate the cooling of the battery pack, where the third threshold is higher than the second threshold.

[0015] The beneficial technical effects brought by the technical solution provided by the embodiment of the present application include:

[0016] When the swapping cabinet is charging, use the air-cooling / liquid-cooling integrated machine in the liquid-cooling module and the air-cooling module to cool and store cold the water in the water tank and the battery pack itself, so that the water in the water tank and the battery module are in a lower temperature state.

[0017] Thus, the battery module and the water in the water tank are used to control the temperature of the battery module during discharge, so that there is no need to set up an additional cooling device in the battery swapping cabinet, which reduces the weight of the battery swapping cabinet and also reduces the energy consumption of controlling the temperature of the battery pack, facilitating the increase of the cargo capacity of the electric vehicle.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or can be learned through the practice of the present application. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, wherein:

[0020] Figure 1 is a schematic structural diagram of a charging and battery swapping station provided by an embodiment of the present application;

[0021] Figure 2 is a schematic structural diagram of a battery pack provided by an embodiment of the present application;

[0022] Figure 3 is a schematic structural diagram of a first liquid cooling plate provided by an embodiment of the present application;

[0023] Figure 4 is a schematic structural diagram of a second liquid cooling plate provided by an embodiment of the present application. Description of the Drawings:

[0025] 1 - Battery swapping cabinet;

[0026] 11 - Water tank;

[0027] 12 - Battery compartment; 121 - Dehumidifier;

[0028] 13 - Battery pack; 131 - Battery module; 132 - First liquid cooling plate; 1321 - Coolant inlet; 1322 - Coolant outlet; 1323 - First fire-fighting liquid / gas inlet; 1324 - First fire-fighting liquid channel; 1325 - First nozzle; 133 - Second liquid cooling plate; 1331 - Second fire-fighting liquid / gas inlet; 1332 - Second fire-fighting liquid channel; 1333 - Second nozzle; 134 - First pressure relief valve; 135 - Second pressure relief valve;

[0029] 14 - Sprinkler main pipe; 141 - Sprinkler branch pipe; 142 - Fourth control valve;

[0030] 15 - Fifth control valve;

[0031] 16 - Booster pump;

[0032] 17 - Circulation pipe;

[0033] 18 - Connecting pipe;

[0034] 2 - Charging and swapping platform;

[0035] 21 - Charging module; 211 - Charging cable;

[0036] 22 - Liquid cooling module; 221 - Water pool; 222 - Air / liquid cooling integrated machine; 223 - Liquid supply water pump; 224 - Main water inlet pipe; 225 - First water inlet branch pipe; 226 - Second water inlet branch pipe; 2261 - Battery pack water inlet branch pipe; 2271 - First return main pipe; 2272 - Second return main pipe; 228 - Return branch pipe; 2281 - Battery pack return port branch pipe; 2291 - Three - way valve; 2292 - First control valve; 2293 - Second control valve;

[0037] 23 - Air cooling module; 231 - High - pressure nitrogen cylinder; 232 - Liquid nitrogen tank; 233 - Third control valve; 234 - Evaporator; 235 - Ventilation main pipe; 2351 First ventilation branch pipe; 2352 Second ventilation branch pipe; 236 - Sixth control valve; 237 - Seventh control valve;

[0038] 24 - Heater;

[0039] 251 - First check valve; 252 - Second check valve. Detailed implementation manners

[0040] The embodiments of the present application will be described below with reference to the accompanying drawings in the present application. It should be understood that the implementation manners described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0041] Those skilled in the art of the present technology can understand that, unless specifically stated, the "the" and "this" used here may also include the plural form. It should be further understood that the term "including" used in the specification of the present application means the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence of other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by the art of the present technology. It should be understood that when we say an element is "connected" or "coupled" to another element, this element can be directly connected or coupled to the other element, or it can mean that this element and the other element establish a connection relationship through an intermediate element. In addition, the "connection" or "coupling" used here can include wireless connection or wireless coupling. The term "and / or" used here means at least one of the items defined by this term. For example, "A and / or B" can be implemented as "A", or implemented as "B", or implemented as "A and B".

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0043] The following uses specific embodiments to elaborate in detail on the technical solutions of this application and how the technical solutions of this application solve the above technical problems. It should be noted that the following embodiments can refer to, draw on, or combine with each other. For the same terms, similar features, and similar implementation steps in different embodiments, they will not be described repeatedly.

[0044] An embodiment of this application provides a charging and battery swapping station. The structural schematic diagram of the charging and battery swapping station is as Figure 1 shown, including: a battery swapping cabinet 1 and a charging and battery swapping platform 2.

[0045] As Figure 1 shown, the battery swapping cabinet 1 includes a water tank 11 and a battery compartment 12 with battery packs 13 arranged in m rows and n columns, where both m and n are positive integers not less than 1.

[0046] As Figure 1 shown, the charging and battery swapping platform 2 includes a charging module 21, a liquid cooling module 22, and an air cooling module 23.

[0047] The charging module 21 is electrically connected to each battery pack 13.

[0048] The liquid cooling module 22 includes a water tank 221, an air-cooling / liquid-cooling integrated machine 222, a liquid supply water pump 223, a water inlet main pipe 224, a first water inlet branch pipe 225, a second water inlet branch pipe 226, a first return main pipe 2271, a second return main pipe 2272, and a return branch pipe 228; the water tank 221 is connected to the air-cooling / liquid-cooling integrated machine 222. The water tank 221 is communicated with one end of the water inlet main pipe 224 through the liquid supply water pump 223. The other end of the water inlet main pipe 224 is respectively communicated with the first water inlet branch pipe 225 and the second water inlet branch pipe 226 through a three-way valve 2291. The first water inlet branch pipe 225 is communicated with the water tank 11. The second water inlet branch pipe 226 is communicated with the battery pack water inlet branch pipes 2261 in m rows and n columns after passing through a first one-way valve 251. The battery packs 13 in m rows and n columns are communicated with the return branch pipe 228 through the battery pack return port branch pipes 2281 in m rows and n columns. The return branch pipe 228 is communicated with the water tank 11 after passing through a first control valve 2292. The water tank 11 is communicated with the air-cooling / liquid-cooling integrated machine 222 through a second control valve 2293 and the first return main pipe 2271. The air-cooling / liquid-cooling integrated machine 222 is communicated with the water tank 221 through the second return main pipe 2272.

[0049] The air-cooling module 23 includes a high-pressure nitrogen cylinder 231, a third control valve 233, a liquid nitrogen tank 232, an evaporator 234 connected in sequence, an air ventilation main pipe 235, a first air ventilation branch pipe 2351, and m rows and n columns of second air ventilation branch pipes 2352. The evaporator 234 is communicated with the water tank 11 through the air ventilation main pipe 235 and the first air ventilation branch pipe 2351; the evaporator 234 is communicated with each battery pack 13 through the air ventilation main pipe 235 and the m rows and n columns of second air ventilation branch pipes 2352.

[0050] In this embodiment, when the battery swapping cabinet 1 is charging, the water in the water tank 11 and the battery pack 13 are cooled and stored with cold by using the air / water cooling integrated machine in the liquid cooling module 22 and the air cooling module 23 in the charging and battery swapping platform 2, so that the water in the water tank 11 is in a lower temperature state, and the battery modules 131 in the battery pack 13 are in a lower temperature state. Thus, the temperature of the battery is controlled by using the cold storage / heat of the water in the water tank 11 during discharge, so that there is no need to set up additional cooling / heating devices in the battery swapping cabinet 1, the weight of the battery swapping cabinet 1 is reduced, and the energy consumption for temperature control of the battery pack 13 can also be reduced, which is convenient for improving the cargo capacity of the electric vehicle.

[0051] Optionally, referring to Figure 2 , the battery pack 13 includes a battery module 131 and a first liquid cooling plate 132, and the first liquid cooling plate 132 is arranged at the bottom of the battery module 131.

[0052] Referring to Figure 2 and Figure 3 , the first liquid cooling plate 132 includes a coolant inlet 1321, a coolant channel and a coolant outlet 1322 that are communicated with each other. The coolant inlet 1321 is communicated with the battery pack water inlet branch pipe 2261; the coolant outlet 1322 is communicated with the battery pack return port branch pipe 2281.

[0053] In this embodiment, when the liquid chiller in the liquid cooling module 22 is turned on, the water in the water pool 221 can be introduced into the first liquid cooling plate 132 through the coolant inlet 1321 to cool the battery module 131, and then it flows back to the water tank 11 through the coolant outlet 1322.

[0054] Optionally, the battery pack 13 further includes a first fire fighting gas inlet 1323, and the first fire fighting gas inlet 1323 is communicated with the second air ventilation branch pipe 2352.

[0055] In this embodiment, low-temperature nitrogen gas or liquid nitrogen is sprayed into the battery pack 13 through the air ventilation main pipe 235 and the second air ventilation branch pipe 2352 of the air cooling module 23 to quickly cool the battery module 131.

[0056] Optionally, the water tank 11 further includes a second fire fighting gas inlet 1331, and the second fire fighting gas inlet 1331 is communicated with the first air ventilation branch pipe 2351.

[0057] In this embodiment, low-temperature nitrogen or liquid nitrogen is sprayed into the water tank 11 through the ventilation main pipe 235 and the first ventilation branch pipe 2351 of the air-cooling module 23 to rapidly cool the water in the water tank 11.

[0058] Optionally, referring to Figure 3 , the first liquid-cooling plate 132 further includes a first fire-fighting liquid inlet 1323, a first fire-fighting liquid channel 1324, and a plurality of first nozzles 1325.

[0059] The first fire-fighting liquid inlet 1323 is communicated with the first fire-fighting liquid channel 1324.

[0060] A plurality of first nozzles 1325 are arranged on the side wall of the first fire-fighting channel 1324, and the first nozzles 1325 spray downward.

[0061] Referring to Figure 2 and Figure 4 , the battery pack 13 further includes a second liquid-cooling plate 133 arranged on the top of the battery module 131. The second liquid-cooling plate 133 includes a second fire-fighting liquid inlet 1331, a second fire-fighting liquid channel 1332, and a plurality of second nozzles 1333. The second fire-fighting liquid inlet 1331 is communicated with the second fire-fighting liquid channel 1332. A plurality of second nozzles 1333 are arranged on the side wall of the second fire-fighting channel 1332, and the second nozzles 1333 spray upward.

[0062] Referring to Figure 1 , the battery swapping cabinet 1 further includes a spray main pipe 14 and spray branch pipes 141 arranged in m rows and n columns. One end of the spray main pipe 14 is communicated with the water tank 11 through a fourth control valve 142, and the other end is communicated with the spray branch pipes 141 arranged in m rows and n columns. The spray branch pipes 141 are communicated with the first fire-fighting liquid inlet 1323 and / or the second fire-fighting liquid inlet 1331.

[0063] In this embodiment, when the temperature of the battery pack 13 reaches the fourth threshold, the water in the water tank 11 is used to spray and cool the periphery of the battery module 131.

[0064] Specifically, rapid cooling can be achieved by spraying downward on the lower-layer battery module 131 through the first liquid-cooling plate 132, or by spraying upward through the second liquid-cooling plate 133 to rapidly cool the battery module 131 of this layer.

[0065] Optionally, referring to Figure 1 , the battery swapping cabinet 1 further includes a fifth control valve 15, a booster water pump 16, and a circulation pipe 17.

[0066] The water tank 11 is sequentially communicated with the booster water pump 16 through the fifth control valve 15 and the circulation pipe 17, and the booster water pump 16 is communicated with the second water inlet branch pipe 226 through a second one-way valve 252.

[0067] The first return main pipe 2271 and the circulation pipe 17 are both communicated with the water tank 11 through the connecting pipe 18.

[0068] In this embodiment, the booster water pump 16 and the circulation pipe 17 are provided. When the water temperature in the water tank 11 is relatively low, the water in the water tank 11 can be directly used to cool the battery pack 13.

[0069] It should be noted that after the water in the water tank 11 comes out through the connecting pipe 18, it can be communicated with the circulation pipe 17 by controlling the fifth control valve 15, or can be communicated with the first return main pipe 2271 by the second control valve 2293.

[0070] Optionally, a dehumidifier 121 is further provided in the battery compartment 12. When the humidity in the battery compartment 12 is higher than the humidity threshold, the dehumidifier 121 is started.

[0071] In this embodiment, the humidity threshold is not less than 90%RH. When the humidity in the battery compartment 12 is higher than the humidity threshold, the dehumidifier 121 is automatically started, or the dehumidifier 121 is started through the controller.

[0072] Optionally, the liquid cooling module 22 further includes a heater 24. The heater 24 is installed in the water tank 221 and is used to heat the water in the water tank 221.

[0073] In this embodiment, when the temperature of the water tank 221 is relatively low, such as less than 3°C, the water in the water tank 221 is heated by the heater 24 to prevent freezing. Further, the water in the water tank 221 can exchange heat with the water in the water tank 11, thereby preventing the water in the water tank 11 from freezing.

[0074] Optionally, the battery pack 13 and the water tank 1 respectively include a first pressure relief valve 134 and a second pressure relief valve 135.

[0075] In this embodiment, the first pressure relief valve 134 can prevent the internal pressure of the battery pack 13 from accumulating too high and causing an explosion, and the second pressure relief valve 135 can prevent the internal pressure of the water tank 11 from being too high and causing the water tank to burst and leak, thereby improving the safety performance of the battery swapping cabinet 1 and the charging and battery swapping platform.

[0076] It should be understood that the charging cable 211 of the charging module 21 is electrically connected and communicatively connected to each battery pack 13 to charge and control the battery module 131.

[0077] Based on the same inventive concept, the embodiment of the present application provides a cooling and fire control method for the above-mentioned charging and battery swapping station. The method includes:

[0078] The external ambient temperature is obtained through a first temperature probe (not shown in the figure), the temperature of the water tank 221 and / or the water tank 11 is obtained through a second temperature probe (not shown in the figure), and the temperature of the battery pack 13 is obtained through a third temperature probe (not shown in the figure).

[0079] When the battery swapping cabinet 1 is charging:

[0080] When the temperatures of the first temperature probe, the second temperature probe, and the third temperature probe are within the first threshold range, the air cooler in the air-cooling / liquid-cooling integrated machine 222 is started to exchange heat with the environment to cool the water in the water tank 221; the three-way valve 2291 is controlled, and through the liquid supply water pump 223, the water in the water tank 221 exchanges heat with the water in the water tank 11, or the water tank directly cools the battery pack 13.

[0081] When the temperatures of the first temperature probe, the second temperature probe, and the third temperature probe are within the second threshold range, the compression refrigeration in the air-cooling / liquid-cooling integrated machine 222 is started to cool the water in the water tank 221; the three-way valve 2291 is controlled, and through the liquid supply water pump 223, the water in the water tank 221 exchanges heat with the water in the water tank 11, or the water tank directly cools the battery pack 13; wherein the second threshold is greater than the first threshold.

[0082] When the temperatures of the first temperature probe, the second temperature probe, and the third temperature probe are within the second threshold range, the compression refrigeration in the air-cooling / liquid-cooling integrated machine 222 is started to cool the water in the water tank 221; the three-way valve 2291 is controlled, and through the liquid supply water pump 223, the water in the water tank 221 exchanges heat with the water in the water tank 11, or the water tank directly cools the battery pack 13; meanwhile, the third control valve 233 is opened to spray low-temperature nitrogen or liquid nitrogen into the battery pack 13 to accelerate the cooling of the battery pack 13, wherein the third threshold is higher than the second threshold.

[0083] In this embodiment, when the battery swapping cabinet 1 is charging, the air / liquid-cooling integrated machine in the liquid-cooling module of the charging and battery swapping platform 2 and the air-cooling module are used to cool and store cold the water in the water tank 11 and the battery pack 13 itself, so that the water in the water tank 11 is in a lower temperature state, and the battery modules 131 in the battery pack 13 are in a lower temperature state. Thus, the stored cold of the water in the water tank 221 and / or the water tank 11 is used to control the temperature of the battery modules 131 during discharging, so that there is no need to set an additional cooling device in the battery swapping cabinet 1, the weight of the battery swapping cabinet 1 is reduced, the energy consumption for controlling the temperature of the battery pack 13 can also be reduced, and the cargo capacity of the electric vehicle can be improved.

[0084] Optionally, the first threshold range is not less than 3°C and not greater than 13°C. The second threshold range is greater than 13°C and not greater than 25°C. The third threshold range is greater than 25°C and less than 59°C.

[0085] Optionally, the control method further includes:

[0086] When the temperatures of the first temperature probe, the second temperature probe, and the third temperature probe are all not lower than the fourth threshold, open the third control valve 233, and spray low-temperature nitrogen gas or liquid nitrogen into the battery pack 13 through the ventilation main pipe 235 and the second ventilation branch pipe 2352 to cool the battery module 131; meanwhile, open the fourth control valve 142, and the water tank 11 sprays water to cool the battery module 131 through the spray main pipe 14, the spray branch pipe 141, the first fire-fighting liquid inlet 1323, the first fire-fighting liquid passage 1324, and a plurality of first nozzles 1325, and / or the water tank 11 sprays water to cool the battery module 131 through the spray main pipe 14, the spray branch pipe 141, the second fire-fighting liquid inlet 1331, the second fire-fighting liquid passage 1332, and a plurality of second nozzles 1333, where the fourth threshold is greater than the third threshold.

[0087] In this embodiment, when the battery swapping cabinet 1 is charging, the low-temperature nitrogen gas or liquid nitrogen in the air-cooling module 23 is used to cool the battery module 131, and at the same time, the water in the water tank 11 is used to spray water to cool the battery module 131, so that the overheated battery module 131 can be quickly cooled, improving the safety of battery charging in the battery swapping cabinet 1.

[0088] Optionally, the fourth threshold is not less than 59 °C.

[0089] Optionally, the cooling and fire-fighting control method further includes: The air-cooling module 23 further includes a sixth control valve 236 and a seventh control valve 237. The first ventilation branch pipe 2351 is communicated with the water tank 11 through the sixth control valve 236; the second ventilation branch pipe 2352 is communicated with each battery pack 13 through the seventh control valve 237.

[0090] Before the battery swapping cabinet 1 is used:

[0091] When the temperatures of the first temperature probe and the third temperature probe are not lower than the fifth threshold, close the third control valve 233 and the sixth control valve 236, open the seventh control valve 237, and spray low-temperature nitrogen gas or liquid nitrogen into the battery module 131 through the ventilation main pipe 235 and the second ventilation branch pipe 2352 to quickly cool the battery module 131.

[0092] When the temperatures of the first temperature probe and the second temperature probe are not lower than the fifth threshold, open the third control valve 233 and the seventh control valve 237, close the sixth control valve 236, and spray low-temperature nitrogen gas or liquid nitrogen into the water tank 11 through the ventilation main pipe 235 and the first ventilation branch pipe 2351 to quickly cool the water in the water tank 11.

[0093] In this embodiment, before the battery swapping cabinet 1 is used, the air-cooling module 23 can quickly cool the water temperature in the water tank 1 and the temperature of the battery pack 13, so that the water in the water tank 11 and the battery pack 13 are at a relatively low temperature. Exemplarily, the relatively low temperature is not less than 13°C and not more than 23°C.

[0094] Optionally, the fifth threshold is not less than 25°C.

[0095] Optionally, the cooling and fire control method further includes: when the temperature of the second temperature probe is not higher than the sixth threshold, heating the water in the pool 221 through the heater 24 to keep the water in the pool 221 from freezing.

[0096] In this embodiment, heating the water in the pool 221 can exchange heat with the water in the water tank 11 to keep the water in the water tank 11 from freezing.

[0097] Those skilled in the art of the present technology can understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, changed, combined, or deleted. Further, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, changed, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and solutions in the related technologies that are the same as those disclosed in this application can also be alternated, changed, rearranged, decomposed, combined, or deleted.

[0098] In the description of this application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are the exemplary directions or positional relationships based on the drawings, which are for the convenience of describing or simplifying the embodiments of this application, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0099] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "plural" is two or more.

[0100] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0101] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

[0102] The above are only some embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical concept of the solution of the present application, other similar implementation means based on the technical idea of the present application also belong to the protection scope of the embodiments of the present application.

Claims

1. A charging and swapping station, characterized in that: include: A battery exchange cabinet, comprising a water tank and a battery compartment with m rows and n columns provided with battery packs arranged below the water tank, wherein m and n are both positive integers not less than 1; The charging and swapping platform includes a charging module, a liquid cooling module and an air cooling module; the charging module is electrically connected to the battery pack; the liquid cooling module includes a water tank, an air cooling / liquid cooling integrated machine, a liquid supply water pump, a water inlet main pipe, a first water inlet branch pipe, a second water inlet branch pipe, a first reflux main pipe, a second reflux main pipe and a reflux branch pipe; the water tank is connected to the air cooling / liquid cooling integrated machine, the water tank is connected to one end of the water inlet main pipe through the liquid supply water pump, and the other end of the water inlet main pipe is respectively connected to the first water inlet branch pipe, the second water inlet branch pipe and the first reflux main pipe through a three-way valve. Two water inlet branches are connected, the first water inlet branch is connected to the water tank, and the second water inlet branch is connected to the water inlet branches of the battery pack in the m rows and n columns after passing through the first one-way valve; the battery packs in the m rows and n columns are connected to the reflux branch through the reflux branch of the battery pack in the m rows and n columns, and the reflux branch is connected to the water tank after passing through the first control valve, and the water tank is connected to the air-cooled / liquid-cooled integrated machine through the second control valve and the first reflux main pipe; the air-cooled / liquid-cooled integrated machine is connected to the water pool through the second reflux main pipe. The air cooling module includes a high-pressure nitrogen bottle, a third control valve, a liquid nitrogen tank and an evaporator, as well as a ventilation main pipe, a first ventilation branch pipe and a second ventilation branch pipe in m rows and n columns connected in sequence; the evaporator is connected to the water tank through the ventilation main pipe and the first ventilation branch pipe, and the evaporator is connected to each of the battery packs through the ventilation main pipe and the second ventilation branch pipes in m rows and n columns.

2. The charging and swapping station according to claim 1, characterized in that: The battery pack includes a battery module and a first liquid cooling plate, and the first liquid cooling plate is arranged at the bottom of the battery module. The first liquid cooling plate includes a cooling liquid inlet, a cooling liquid channel and a cooling liquid outlet which are interconnected. The cooling liquid inlet is connected to the battery pack water inlet branch; the cooling liquid outlet is connected to the battery pack return branch.

3. The charging and swapping station according to claim 2, characterized in that: The battery pack further includes a first fire-fighting gas inlet; the first fire-fighting gas inlet is connected to the second ventilation branch pipe.

4. The charging and swapping station according to claim 3, characterized in that: The first liquid cooling plate further includes a first fire-fighting liquid inlet, a first fire-fighting liquid channel and a plurality of first nozzles. The first fire-fighting liquid inlet is in communication with the first fire-fighting liquid passage; A plurality of the first nozzles are arranged on the side wall of the first fire fighting passage, and the first nozzles spray downwards; The battery pack further includes a second liquid cooling plate disposed on the top of the battery module, the second liquid cooling plate including a second fire-fighting liquid inlet, a second fire-fighting liquid channel and a plurality of second nozzles; the second fire-fighting liquid inlet is connected to the second fire-fighting liquid channel, a plurality of second nozzles are disposed on the side wall of the second fire-fighting channel, and the second nozzles spray upward; The power exchange cabinet also includes a spray main pipe and m rows and n columns of spray branches. One end of the spray main pipe is connected to the water tank through a fourth control valve, and the other end is connected to the spray branch pipe on the liquid cooling plate in m rows and n columns. The spray branch pipe is connected to the first fire-fighting liquid inlet and / or the second fire-fighting liquid inlet.

5. The charging and swapping station according to claim 1, characterized in that: The power exchange cabinet also includes a fifth control valve, a booster water pump and a circulation pipe. The water tank is connected to the booster water pump in sequence through the fifth control valve and the circulation pipe, and the booster water pump is connected to the second water inlet branch pipe through the second one-way valve; The first reflux main pipe and the circulation pipe are both connected to the water tank through a connecting pipe.

6. The charging and swapping station according to claim 1, characterized in that: A dehumidifier is also arranged in the battery compartment, and when the humidity in the battery compartment is higher than a humidity threshold, the dehumidifier is started.

7. The charging and swapping station according to claim 1, characterized in that: Include at least one of the following: The liquid cooling module further comprises a heater, which is installed in the water pool and is used to heat the water in the water pool; The battery pack and the water tank respectively include a first pressure relief valve and a second pressure relief valve.

8. A cooling fire control method for a charging and swapping station according to any one of claims 1 to 7, characterized in that: include: The external environment temperature is obtained by a first temperature probe, the temperature of the water pool and / or the water tank is obtained by a second temperature probe, and the battery pack temperature is obtained by a third temperature probe. When the battery swap cabinet is charging: When the temperatures of the first temperature probe, the second temperature probe and the third temperature probe are within a first threshold range, the air cooler in the air cooling / liquid cooling integrated machine is started to exchange heat with the environment to cool the water in the water pool; the three-way valve is controlled to allow the water in the water tank to exchange heat with the water pool through the liquid supply pump, or the battery pack is directly cooled by the water pool. When the temperatures of the first temperature probe, the second temperature probe and the third temperature probe are within a second threshold range, the compressor in the air cooling / liquid cooling integrated machine is started to cool the water in the water pool; the three-way valve is controlled to allow the water in the water tank to be heat exchanged by the water pool through the liquid supply water pump, or the battery pack is directly cooled by the water pool; The second threshold is greater than the first threshold. When the temperatures of the first temperature probe, the second temperature probe and the third temperature probe are within a third threshold range, the compressor refrigeration in the air-cooling / liquid-cooling integrated machine is started to cool the water in the water pool; the three-way valve is controlled, and the water in the water tank is heat-exchanged by the water pool through the liquid supply water pump, or the battery pack is directly cooled by the water pool; at the same time, the third control valve is opened to spray low-temperature nitrogen or liquid nitrogen into the battery pack to accelerate the cooling of the battery pack; wherein the third threshold is higher than the second threshold.

9. The cooling fire control method according to claim 8, characterized in that: Also includes: When the battery swap cabinet is charging: When the temperatures of the first temperature probe, the second temperature probe and the third temperature probe are not lower than a fourth threshold value, the third control valve is opened, and low-temperature nitrogen or liquid nitrogen is sprayed into the battery pack through the ventilation main pipe and the second ventilation branch pipe to cool the battery module; at the same time, the fourth control valve is opened, and the battery pack is cooled by water spraying through the spray main pipe, the spray branch pipe, the first fire-fighting liquid inlet, the first fire-fighting liquid channel and the plurality of the first nozzles from the water tank, and / or the battery pack is cooled by water spraying through the spray main pipe, the spray branch pipe, the second fire-fighting liquid inlet, the second fire-fighting liquid channel and the plurality of the second nozzles from the water tank, wherein the fourth threshold value is greater than the third threshold value.

10. The cooling fire control method according to claim 8, characterized in that: Also includes: The air cooling module further includes a sixth control valve and a seventh control valve. The first ventilation branch pipe is connected to the water tank through the sixth control valve; the second ventilation branch pipe is connected to each of the battery packs through the seventh control valve. Before using the power exchange cabinet: When the temperatures of the first temperature probe and the third temperature probe are not lower than the fifth threshold value, the third control valve and the sixth control valve are opened, the seventh control valve is closed, and low-temperature nitrogen or liquid nitrogen is sprayed into the battery pack through the ventilation main pipe and the second ventilation branch pipe to cool the battery module. When the temperatures of the first temperature probe and the second temperature probe are not lower than the fifth threshold value, the third control valve and the seventh control valve are opened, the sixth control valve is closed, and low-temperature nitrogen or liquid nitrogen is sprayed into the water tank through the ventilation main pipe and the first ventilation branch pipe to cool the water in the water tank.

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