Fire-fighting liquid cooling device for battery charging and replacing cabinet

Abstract

The invention provides a fire-fighting liquid cooling device for a battery charging and replacing cabinet. Comprising a plurality of liquid cooling plates, a plurality of water receiving trays, a water collecting tank, a water tank, a booster pump, a water chilling unit, a main liquid inlet pipe, a plurality of cooling liquid inlet branch pipes, a plurality of cooling liquid return branch pipes, a cooling liquid return main pipe, a liquid cooling valve, a fire fighting liquid inlet main pipe, a fire fighting valve, a plurality of fire fighting liquid inlet branch pipes, a plurality of fire fighting liquid return branch pipes, a fire fighting liquid return main pipe, a circulating pump and a controller, wherein a cooling liquid channel and a fire-fighting liquid channel which are separated from each other are formed in the liquid cooling plate, and a plurality of spraying openings which are respectively communicated with the fire-fighting liquid channel are formed in the lower surface of the liquid cooling plate. When the battery temperature exceeds a first preset threshold value, the controller controls the fire valve to be closed and the liquid cooling valve to be opened, so that the liquid cooling plate heats or cools the battery pack; and when the battery temperature exceeds a second preset threshold value, the controller controls the fire valve to be opened and the liquid cooling valve to be closed, so that the liquid cooling plate cools and sprays water to the battery pack at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery application safety, and in particular relates to a fire-fighting liquid cooling device for a charging and swapping cabinet. Background Art

[0002] When lithium battery packs for electric vehicles are centrally charged in a charging and swapping cabinet, air cooling or liquid cooling is usually used to cool the battery packs. When individual batteries in the battery pack experience thermal runaway, these two cooling methods are difficult to quickly and effectively reduce the temperature of the battery pack. Even if gas firefighting methods such as perfluorohexanone and heptafluoropropane are used to extinguish the open flames in the battery pack, it is difficult to prevent the battery from reigniting because the heat inside the battery pack cannot be quickly removed. There are still high safety risks such as fire, explosion and combustion. Therefore, how to quickly cool down or extinguish the battery pack during centralized charging to prevent thermal runaway and thermal expansion of the lithium battery pack has become a technical problem that urgently needs to be solved. Summary of the invention

[0003] The present invention is made to solve the above-mentioned technical problems, and its purpose is to provide a fire-fighting liquid cooling device for a charging and swapping cabinet.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a fire-fighting liquid cooling device for a charging and swapping cabinet, which has the following characteristics: multiple liquid cooling plates, multiple water receiving trays, a water collecting trough, a water tank, a booster pump, a chiller, a main liquid inlet pipe, multiple cooling liquid inlet branch pipes, multiple cooling liquid return branch pipes, a cooling liquid return main pipe, a liquid cooling valve, a fire-fighting liquid inlet main pipe, a fire-fighting valve, multiple fire-fighting liquid inlet branch pipes, multiple fire-fighting liquid return branch pipes, a fire-fighting liquid return main pipe, a circulating pump and a controller, wherein the multiple liquid cooling plates and the multiple water receiving trays are respectively installed on the top and bottom of multiple charging compartments of the charging and swapping cabinet, the interior of the liquid cooling plate is formed with cooling liquid channels and fire-fighting liquid channels separated from each other, and the lower surface is provided with multiple spray nozzles respectively connected to the fire-fighting liquid channels; the water collecting trough is arranged below the multiple charging compartments; the water tank is used to hold the coolant, the water inlet of the booster pump is connected to the water tank, the water outlet is connected to the chiller, one end of the main liquid inlet pipe is connected to the chiller, and the other end is respectively connected to the multiple cooling liquid inlet branch pipes. connected; multiple coolant inlet branch pipes are respectively connected to the coolant inlets of multiple coolant channels, multiple coolant return branch pipes are respectively connected to the coolant outlets of multiple coolant channels, one end of the coolant return main pipe is respectively connected to the multiple coolant return branch pipes, and the other end is connected to the water tank and is equipped with a liquid cooling valve; one end of the fire-fighting liquid inlet main pipe is connected to the portion of the coolant return main pipe located between the liquid cooling valve and the coolant return branch pipe, and is equipped with a fire-fighting valve, and the other end is respectively connected to the multiple fire-fighting liquid inlet branch pipes; multiple fire-fighting liquid inlet branch pipes are respectively connected to the fire-fighting liquid inlets of multiple fire-fighting liquid channels, one end of the multiple fire-fighting liquid return branch pipes is respectively connected to the multiple water receiving pans, and the other end is connected to the water collecting tank; both ends of the fire-fighting liquid return main pipe are respectively connected to the water collecting tank and the water tank, and a circulating pump is arranged on the fire-fighting liquid return main pipe; the controller is respectively communicated and connected with the booster pump, the chiller, the liquid cooling valve, the fire-fighting valve and the circulating pump through a communication line. When the battery temperature exceeds the first predetermined threshold, the controller controls the fire valve to close and the liquid cooling valve to open, so that the liquid cooling plate heats or cools the battery pack; when the battery temperature exceeds the second predetermined threshold, the controller controls the fire valve to open and the liquid cooling valve to close, so that the liquid cooling plate cools and sprays the battery pack at the same time.

[0006] The fire-fighting liquid cooling device for the charging and swapping cabinet provided by the present invention may also have the following features: a temperature sensor is installed in the water tank for real-time monitoring of the temperature of the coolant in the water tank, and a controller is communicatively connected with the temperature sensor for controlling the start and stop of the chiller according to the water temperature.

[0007] The fire-fighting liquid cooling device for the charging and swapping cabinet provided by the present invention may also have the following feature: a heater is installed in the water tank.

[0008] The fire-fighting liquid cooling device for the charging and swapping cabinet provided by the present invention may also have the following feature: a temperature sensor is installed in the battery pack for real-time monitoring of the battery pack temperature.

[0009] Function and Effect of the Invention

[0010] According to the fire-fighting liquid cooling device for a charging and swapping cabinet involved in the present invention, one end of the main liquid inlet pipe is connected to the chiller, and the other end is respectively connected to a plurality of coolant liquid inlet branch pipes; the plurality of coolant liquid inlet branch pipes are respectively connected to the coolant inlets of a plurality of coolant channels, and the plurality of coolant liquid return branch pipes are respectively connected to the coolant outlets of a plurality of coolant channels; one end of the coolant liquid return main pipe is respectively connected to the plurality of coolant liquid return branch pipes, and the other end is connected to the water tank and is equipped with a liquid cooling valve; the fire-fighting liquid liquid inlet main pipe is connected to the water tank and is equipped with a liquid cooling valve; the fire-fighting liquid liquid return ... One end of the pipe is connected to the portion of the coolant return main pipe between the liquid cooling valve and the coolant return branch pipe, and a fire valve is installed. The other end is connected to multiple fire liquid inlet branches respectively; multiple fire liquid inlet branches are respectively connected to the fire liquid inlets of multiple fire liquid channels, one end of multiple fire liquid return branches is respectively connected to multiple water receiving trays, and the other end is connected to the water collection tank; the two ends of the fire liquid return main pipe are respectively connected to the water collection tank and the water tank, and the circulating pump is set on the fire liquid return main pipe. When the battery temperature exceeds the first predetermined threshold, the controller controls the fire valve to close and the liquid cooling valve to open, so that the liquid cooling plate heats or cools the battery pack; when the battery temperature exceeds the second predetermined threshold, the controller controls the fire valve to open and the liquid cooling valve to close, so that the liquid cooling plate cools and sprays the battery pack at the same time, and can cool or heat the battery pack according to the battery temperature, or cool and spray water to cool down and extinguish the fire at the same time, which greatly improves the safety of the charging and swapping cabinet. In addition, by controlling the opening and closing of the fire valve and the cooling valve, some pipelines are shared, which simplifies the pipeline design and reduces the design cost; the water tank provides cooling / heating and fire-fighting water for the battery pack at the same time, greatly improving the water utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of a fire-fighting liquid cooling device for a charging and swapping cabinet in an embodiment of the present invention; and

[0012] Figure 2 2 is a schematic diagram of the structure of the liquid cooling plate in an embodiment of the present invention when viewed from above. DETAILED DESCRIPTION

[0013] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0014] <Example>

[0015] Figure 1 It is a structural schematic diagram of a fire-fighting liquid cooling device for a charging and swapping cabinet in an embodiment of the present invention.

[0016] like Figure 1As shown, in the present embodiment, the fire-fighting liquid cooling device 10 for the charging and swapping cabinet includes multiple liquid cooling plates 11, multiple water receiving trays 12, a water collecting tank 13, a water tank 14, a booster pump 15, a chiller 16, a main liquid inlet pipe 17, multiple coolant liquid inlet branches 18, multiple coolant liquid return branches 19, a coolant liquid return main pipe 20, a liquid cooling valve 21, a fire-fighting liquid inlet main pipe 22, a fire-fighting valve 23, multiple fire-fighting liquid inlet branches 24, multiple fire-fighting liquid return branches 25, a fire-fighting liquid return main pipe 26, a circulating pump 27 and a controller (not shown in the figure).

[0017] Figure 2 2 is a schematic diagram of the structure of the liquid cooling plate in an embodiment of the present invention when viewed from above.

[0018] like Figure 1 and Figure 2 As shown, a plurality of liquid cooling plates 11 are respectively installed on the top of a plurality of charging compartments 31 of the charging and swapping cabinet 30. A cooling liquid channel and a fire-fighting liquid channel (not shown in the figure) separated from each other are formed inside each liquid cooling plate 11.

[0019] The cooling liquid channel is located in the middle of the liquid cooling plate 11 , and a cooling liquid inlet 111 and a cooling liquid outlet 112 connected to the cooling liquid channel are provided on the lower surface of the rear end of the liquid cooling plate 11 .

[0020] The fire-fighting liquid channel is located at the edges of the left and right sides and the front end of the liquid cooling plate 11. The lower surface of the rear end of the liquid cooling plate 11 is provided with a fire-fighting liquid inlet 113 respectively connected to the fire-fighting liquid channel; the lower surface of the liquid cooling plate 11 is provided with a plurality of spray ports 114 respectively connected to the fire-fighting liquid channel. In this embodiment, the spray ports 114 have an inclination angle.

[0021] like Figure 1 As shown, a plurality of water receiving trays 12 are respectively installed at the bottom of a plurality of charging compartments 31 .

[0022] like Figure 1 As shown, the water collection tank 13 is arranged below the multiple charging compartments 31.

[0023] like Figure 1 As shown, the water tank 14 is used to contain the cooling liquid, and a temperature sensor 141 is installed therein for real-time monitoring of the temperature of the cooling liquid therein. In the present embodiment, a heater 142 is installed in the water tank 14 to prevent the water temperature in the water tank from being too low to freeze and cannot be used.

[0024] like Figure 1 As shown, the water inlet of the booster pump 15 is connected to the water tank 14 .

[0025] like Figure 1 As shown, the chiller 16 is connected to the water outlet of the booster pump 15.

[0026] like Figure 1As shown, one end of the main liquid inlet pipe 17 is connected to the chiller.

[0027] like Figure 1 and Figure 2 As shown, a plurality of cooling liquid inlet branch pipes 18 are respectively connected to the other end of the main inlet pipe 17 , and are respectively connected to the cooling liquid inlets 111 of a plurality of liquid cooling plates 11 .

[0028] like Figure 1 and Figure 2 As shown, the plurality of cooling liquid return branch pipes 19 are respectively connected to the cooling liquid outlets 112 of the plurality of liquid cooling plates 11 .

[0029] like Figure 1 As shown, one end of the coolant return main pipe 20 is connected to the plurality of coolant return branch pipes 19 respectively, and the other end is connected to the water tank 14.

[0030] like Figure 1 As shown, the liquid cooling valve 21 is installed on the coolant return main pipe 20 at a position between the coolant return branch pipe 19 and the water tank.

[0031] like Figure 1 As shown, one end of the fire-fighting liquid inlet main pipe 22 is connected to a portion of the coolant return main pipe 20 located between the liquid cooling valve 21 and the coolant return branch pipe 19 .

[0032] like Figure 1 As shown, the fire valve 23 is installed at a position of the fire liquid inlet main pipe 22 close to the coolant return main pipe 20.

[0033] like Figure 1 As shown, a plurality of fire-fighting liquid inlet branch pipes 24 are respectively connected to the other end of the fire-fighting liquid inlet main pipe 22 , and are respectively connected to the fire-fighting liquid inlets 113 of the fire-fighting liquid channels of a plurality of liquid cooling plates 11 .

[0034] like Figure 1 As shown, one end of the plurality of fire-fighting liquid return branch pipes 25 is respectively connected to the plurality of water receiving trays 12 , and the other end is connected to the water collecting tank 13 .

[0035] like Figure 1 As shown, the two ends of the fire-fighting liquid return main pipe 26 are connected to the water collecting tank 13 and the water tank 14 respectively.

[0036] like Figure 1 As shown, the circulation pump 27 is arranged on the fire-fighting liquid return main pipe 26.

[0037] In this embodiment, a temperature sensor (not shown in the figure) is installed in the battery pack 31 for real-time monitoring of the battery pack temperature.

[0038] like Figure 1As shown, the controller is respectively connected to the temperature sensor 141 and the heater 142 in the water tank 14, the temperature sensor in the battery pack 31, the booster pump 15, the chiller 16, the liquid cooling valve 21, the fire valve 23 and the circulating pump 27 through the communication line, and is used to control the start and stop of the heater 142 according to the water temperature monitored by the temperature sensor 141 to prevent the coolant in the water tank from freezing due to too low a temperature and being unusable, and to control the start and stop of the chiller 16 so that the temperature of the coolant meets the requirements of fire fighting and liquid cooling; it is also used to control the fire valve 23 to close and the liquid cooling valve 21 to open when the battery temperature detected by the temperature sensor in the battery pack 31 exceeds the first predetermined threshold value, so that the liquid cooling plate 11 heats or cools the battery pack 31; it is also used to control the fire valve 23 to open and the liquid cooling valve 21 to close when the battery temperature detected by the temperature sensor in the battery pack 31 exceeds the second predetermined threshold value, so that the liquid cooling plate 11 cools and sprays the battery 31 with water at the same time.

[0039] In this embodiment, the working process of the fire-fighting liquid cooling device 10 for the charging and swapping cabinet is as follows:

[0040] When the battery temperature exceeds the first predetermined threshold, the controller controls the fire valve 23 to close and the liquid cooling valve 21 to open. The coolant coming out of the chiller 16 passes through the main liquid inlet pipe 17 and the coolant inlet branch pipe 18, and then flows into the coolant channel of each liquid cooling plate 11 from each coolant inlet 111, so that the liquid cooling plate 11 heats or cools the battery pack 31; the coolant flowing out of each coolant outlet 112 is gathered into the coolant return main pipe 20 through each coolant return branch pipe 19, and flows back to the water tank 14 after passing through the liquid cooling valve 21.

[0041] When the battery temperature exceeds the second predetermined threshold, the controller controls the fire valve 23 to open and the liquid cooling valve 21 to close. The coolant from the chiller 16 flows through the main liquid inlet pipe 17 and the coolant inlet branch pipe 18, and then flows through the coolant channel of each liquid cooling plate 11 from each coolant inlet 111, so that the liquid cooling plate 11 cools the battery pack 31. The coolant flowing out of each coolant outlet 112 is gathered to the coolant return main pipe 20 through each coolant return branch pipe 19, and enters the fire valve 23. After the fire-fighting liquid enters the main pipe 22 and the fire-fighting liquid inlet branch pipe 24, it flows from each fire-fighting liquid inlet 113 through the fire-fighting liquid channel of each liquid cooling plate 11, and then is sprayed on the battery pack 31 through the spray port 114 on the liquid cooling plate 11, so that the liquid cooling plate 11 cools and sprays the battery pack 31 at the same time; the spraying water is collected in the water receiving tray 12 at the bottom of each battery compartment, and is collected in the water collecting tank 13 through the fire-fighting liquid return branch pipe 25, and then is injected into the water tank 14 through the fire-fighting liquid return main pipe 26 by the circulating pump 27.

[0042] Example Function and Effect

[0043] According to the fire-fighting liquid cooling device for the charging and swapping cabinet involved in this embodiment, one end of the main liquid inlet pipe is connected to the chiller, and the other end is respectively connected to a plurality of coolant liquid inlet branch pipes; the plurality of coolant liquid inlet branch pipes are respectively connected to the coolant inlets of the plurality of liquid cooling plates, and the plurality of coolant liquid return branch pipes are respectively connected to the coolant outlets of the plurality of liquid cooling plates; one end of the coolant liquid return main pipe is respectively connected to the plurality of coolant liquid return branch pipes, and the other end is connected to the water tank and is equipped with a liquid cooling valve; the fire-fighting liquid inlet main pipe is connected to the plurality of coolant liquid return branch pipes, and the other end is connected to the water tank and is equipped with a liquid cooling valve; One end of the pipe is connected to the portion of the coolant return main pipe between the liquid cooling valve and the coolant return branch pipe, and a fire valve is installed. The other end is connected to multiple fire liquid inlet branches respectively; multiple fire liquid inlet branches are respectively connected to the fire liquid inlet of multiple liquid cooling plates, one end of multiple fire liquid return branches is respectively connected to multiple water receiving trays, and the other end is connected to the water collection tank; the two ends of the fire liquid return main pipe are respectively connected to the water collection tank and the water tank, and the circulating pump is set on the fire liquid return main pipe. When the battery temperature exceeds the first predetermined threshold, the controller controls the fire valve to close and the liquid cooling valve to open, so that the liquid cooling plate heats or cools the battery pack; when the battery temperature exceeds the second predetermined threshold, the controller controls the fire valve to open and the liquid cooling valve to close, so that the liquid cooling plate cools and sprays the battery pack at the same time, and can cool or heat the battery pack according to the battery temperature, or cool and spray water to cool down and extinguish the fire at the same time, which greatly improves the safety of the charging and swapping cabinet. In addition, by controlling the opening and closing of the fire valve and the cooling valve, some pipelines are shared, which simplifies the pipeline design and reduces the design cost; the water tank provides cooling / heating and fire-fighting circulating water for the battery pack at the same time, greatly improving the water utilization efficiency.

[0044] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A fire-fighting liquid cooling device for a charging and swapping cabinet, characterized in that: include: Multiple liquid cooling plates, multiple water trays, water collection tanks, water tanks, booster pumps, chillers, main liquid inlet pipes, multiple coolant inlet branches, multiple coolant return branches, coolant return main pipe, liquid cooling valve, fire liquid inlet main pipe, fire valve, multiple fire liquid inlet branches, multiple fire liquid return branches, fire liquid return main pipe, circulation pump and controller, The plurality of liquid cooling plates and the plurality of water receiving trays are respectively installed on the top and bottom of the plurality of charging compartments of the charging and swapping cabinet. The liquid cooling plate has a cooling liquid channel and a fire-fighting liquid channel separated from each other formed inside, and a plurality of spray ports respectively connected to the fire-fighting liquid channels are provided on the lower surface. The water collecting tank is arranged below the plurality of charging compartments. The water tank is used to contain coolant. The water inlet of the booster pump is connected to the water tank, and the water outlet is connected to the chiller. One end of the main liquid inlet pipe is connected to the chiller, and the other end is connected to the plurality of cooling liquid inlet branch pipes respectively. The plurality of coolant inlet branches are respectively connected to the coolant inlets of the plurality of coolant channels. The plurality of coolant return branches are respectively connected to the coolant outlets of the plurality of coolant channels. One end of the coolant return main pipe is connected to the multiple coolant return branch pipes respectively, and the other end is connected to the water tank and is installed with the liquid cooling valve. One end of the fire-fighting liquid inlet main pipe is connected to the portion of the coolant return main pipe between the liquid cooling valve and the coolant return branch pipe, and is equipped with the fire-fighting valve, and the other end is connected to the plurality of fire-fighting liquid inlet branches respectively. The plurality of fire-fighting liquid inlet branches are respectively connected to the fire-fighting liquid inlets of the plurality of fire-fighting liquid channels. One end of the plurality of fire-fighting liquid return branch pipes is respectively connected to the plurality of water receiving trays, and the other end is connected to the water collecting tank. The two ends of the fire-fighting liquid return main pipe are respectively connected to the water collecting tank and the water tank. The circulating pump is arranged on the fire-fighting liquid return main pipe. The controller is connected to the booster pump, the chiller, the liquid cooling valve, the fire valve and the circulation pump through communication lines. When the battery temperature exceeds a first predetermined threshold, the controller controls the fire valve to close and the liquid cooling valve to open, so that the liquid cooling plate heats or cools the battery pack. When the battery temperature exceeds a second predetermined threshold, the controller controls the fire valve to open and the liquid cooling valve to close, so that the liquid cooling plate cools and sprays water on the battery pack at the same time.

2. The fire-fighting liquid cooling device for a charging and swapping cabinet according to claim 1 is characterized in that: in, A temperature sensor is installed in the water tank to monitor the temperature of the coolant in the water tank in real time. The controller is communicatively connected to the temperature sensor and is used to control the start and stop of the chiller according to the water temperature.

3. The fire-fighting liquid cooling device for a charging and swapping cabinet according to claim 1 is characterized in that: in, A heater is installed in the water tank.

4. The fire-fighting liquid cooling device for a charging and swapping cabinet according to claim 1 is characterized in that: in, A temperature sensor is installed in the battery pack to monitor the temperature of the battery pack in real time.

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