Electric pile cooling water tank

Abstract

The utility model relates to the field of water tank structures, in particular to an electric pile cooling water tank. When the galvanic pile runs, a proper reaction temperature is needed, when the reaction temperature of the galvanic pile is too high, the heating unit is closed, the water pump works to pump water in the water tank body to the heat exchange unit for cooling treatment, then the water enters a heat dissipation pipeline inlet of the galvanic pile, and the water flows back into the water tank body through the water return pipe after heat dissipation of the galvanic pile, so that the heat dissipation work is completed; when the reaction temperature of the galvanic pile is too low, the heating unit is turned on and heats water in the water tank body, the heated water pumps water in the water tank to the heat exchange unit through the water pump, at the moment, the heat exchange unit is turned off and is only used as a passage, and then the water enters a heat dissipation pipeline inlet of the galvanic pile; after being heated, the galvanic pile flows back into the water tank body through the water return pipe, and heating work is completed; according to the scheme, the reaction temperature of the galvanic pile can be correspondingly controlled, and the working efficiency of the galvanic pile is improved on the basis of ensuring the working conditions of the galvanic pile.

Description

Technical Field

[0001] The utility model relates to the field of water tank structures, in particular to a fuel cell stack cooling water tank. Background Art

[0002] At present, the structure of the fuel cell stack cooling water tank is carefully designed and manufactured to ensure that it can effectively perform the cooling task while remaining efficient and reliable. Such tanks are usually made of high-quality materials such as stainless steel or high-strength plastic to withstand the pressure and temperature changes that may occur in the working environment.

[0003] The design of the stack cooling water tank usually includes key components such as the water inlet, water outlet, coolant flow channel, and temperature sensor. The water inlet is responsible for introducing the coolant into the water tank, while the water outlet is responsible for discharging the cooled coolant. The design of the coolant flow channel ensures that the coolant can flow evenly through the stack, thereby effectively reducing its temperature. The temperature sensor is used to monitor the temperature in the water tank so as to adjust the coolant flow and temperature in time to keep the stack in the best working condition.

[0004] In addition, the stack cooling water tank is usually equipped with auxiliary equipment such as filters and pumps to ensure the smooth operation of the cooling system. The filter is used to remove impurities and particulate matter in the coolant to prevent them from clogging the flow channel or damaging the stack. The pump is responsible for providing sufficient power to enable the coolant to circulate and achieve effective cooling.

[0005] In short, the structural design of the stack cooling water tank fully considers factors such as cooling efficiency, reliability and durability to ensure that the stack can maintain optimal performance under various working conditions. The manufacture and installation of this water tank requires strict quality control and process requirements to ensure its long-term and stable operation. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a cooling water tank for a battery stack to solve the problem of temperature control of the battery stack.

[0007] The utility model provides a technical solution to the above technical problems as follows: a cooling water tank for a fuel cell stack, comprising a water tank body, a heating unit, a ventilation valve, a water pump and a heat exchange unit, wherein the water tank body is connected with a water inlet pipe, a water outlet pipe and a water return pipe, the heating unit and the ventilation valve are embedded in the water tank body, the water tank body is connected with the water pump through the water outlet pipe, the water pump is connected with the inlet of the heat dissipation pipeline of the fuel cell stack through the heat exchange unit, and the outlet of the heat dissipation pipeline of the fuel cell stack is connected with the water tank body through the return pipe.

[0008] Furthermore, a first temperature sensor is embedded in the water tank body.

[0009] Furthermore, a conductivity sensor is embedded in the water tank body.

[0010] Furthermore, the heating unit comprises at least one heating rod.

[0011] Furthermore, a support foot is provided at the bottom of the water tank body, and the support foot is fixedly connected to the water tank body.

[0012] Furthermore, a first Y-type filter is provided on the water outlet pipe.

[0013] Furthermore, a second Y-type filter is provided on the water return pipe.

[0014] Furthermore, a pressure relief pipeline and a first pressure sensor are provided on the pipeline connecting the water pump and the heat exchange unit, the pressure relief pipeline is in communication with the water tank body, and an unloading valve is provided on the pressure relief pipeline.

[0015] Furthermore, the heat exchange unit includes a plate heat exchanger, a cooling water inlet pipe and a cooling water outlet pipe. The plate heat exchanger is provided with a first channel inlet, a first channel outlet, a second channel inlet and a second channel outlet. The first channel inlet is connected to the water pump, the first channel outlet is connected to the fuel cell stack, the second channel inlet is connected to the cooling water inlet pipe, the second channel outlet is connected to the cooling water outlet pipe, and a proportional valve is provided on the cooling water inlet pipe.

[0016] Furthermore, a second temperature sensor and a second pressure sensor are provided on the pipeline connecting the heat exchange unit and the fuel cell stack, and a third temperature sensor and a third pressure sensor are provided on the return water pipe.

[0017] The utility model provides a fuel cell stack cooling water tank, comprising a water tank body, a heating unit, a breathable valve, a water pump and a heat exchange unit, wherein the water tank body is connected with a water inlet pipe, a water outlet pipe and a water return pipe, the heating unit and the breathable valve are embedded in the water tank body, the water tank body is connected with the water pump through the water outlet pipe, the water pump is connected with the heat dissipation pipeline inlet of the fuel cell stack through the heat exchange unit, and the heat dissipation pipeline outlet of the fuel cell stack is connected with the water tank body through the water return pipe. In this way, since the fuel cell stack requires a relatively appropriate reaction temperature during operation, when the reaction temperature of the fuel cell stack is too high, the heating unit is turned off, and the water pump works to pump the water in the water tank body to the heat exchange unit for cooling, and then enters the heat dissipation pipeline entrance of the fuel cell stack, and after the fuel cell stack is cooled, it flows back to the water tank body through the return pipe to complete the heat dissipation work; when the reaction temperature of the fuel cell stack is too low, the heating unit is turned on, and the heating unit heats the water in the water tank body, and the heated water is pumped to the heat exchange unit through the water pump. At this time, the heat exchange unit is closed and used only as a passage, and then enters the heat dissipation pipeline entrance of the fuel cell stack, and after the fuel cell stack is heated, it flows back to the water tank body through the return pipe to complete the heating work; through this scheme, the reaction temperature of the fuel cell stack can be controlled accordingly, thereby improving the working efficiency of the fuel cell stack while ensuring the working conditions of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a cooling water tank for a fuel cell stack according to the utility model;

[0019] Figure 2 The utility model is a schematic diagram of the heat exchange unit structure of a fuel cell cooling water tank.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Water tank body, 2. Heating unit, 3. Breathing valve, 4. Water pump, 5. Heat exchange unit, 501. Plate heat exchanger, 502. Cooling water inlet pipe, 503. Cooling water outlet pipe, 504. First channel inlet, 505. First channel outlet, 506. Second channel inlet, 507. Second channel outlet, 508. Proportional valve, 6. Inlet pipe, 7. Outlet pipe, 8. Return pipe, 9. First temperature sensor, 10. Conductivity sensor, 11. Support foot, 12. First Y-type filter, 13. Second Y-type filter, 14. Pressure relief pipeline, 15. First pressure sensor, 16. Unloading valve, 17. Second temperature sensor, 18. Second pressure sensor, 19. Third temperature sensor, 20. Third pressure sensor. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "center", "inside", "outside", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-Figure 2 As shown, the utility model provides a fuel cell stack cooling water tank, including a water tank body 1, a heating unit 2, a breathable valve 3, a water pump 4 and a heat exchange unit 5, the water tank body 1 is connected with a water inlet pipe 6, a water outlet pipe 7 and a return pipe 8, the heating unit 2 and the breathable valve 3 are both embedded in the water tank body 1, the water tank body 1 is connected with the water pump 4 through the water outlet pipe 7, the water pump 4 is connected with the heat dissipation pipeline inlet of the fuel cell stack through the heat exchange unit 5, and the heat dissipation pipeline outlet of the fuel cell stack is connected with the water tank body 1 through the return pipe 8. In this way, since the fuel cell stack requires a relatively suitable reaction temperature during operation, when the reaction temperature of the fuel cell stack is too high, the heating unit 2 is turned off, and the water pump 4 works to pump the water 4 in the water tank body 1 to the heat exchange unit 5 for cooling, and then enters the heat dissipation pipeline entrance of the fuel cell stack, and after the fuel cell stack is cooled, it passes through the return pipe 8 and flows back to the water tank body 1 to complete the heat dissipation work; when the reaction temperature of the fuel cell stack is too low, the heating unit 2 is turned on, and the heating unit 2 heats the water in the water tank body 1, and the heated water passes through the water pump 4 to pump the water 4 in the water tank to the heat exchange unit 5. At this time, the heat exchange unit 5 is closed and used only as a passage, and then enters the heat dissipation pipeline entrance of the fuel cell stack, and after the fuel cell stack is heated, it passes through the return pipe 8 and flows back to the water tank body 1 to complete the heating work; through this scheme, the reaction temperature of the fuel cell stack can be controlled accordingly, and the working efficiency of the fuel cell stack can be improved on the basis of ensuring the working conditions of the fuel cell stack. In addition, since the water tank body 1 is a normal temperature container, the pressure needs to be regulated accordingly, so a breathable valve 3 is installed on the water tank body 1 to ensure that the pressure in the water tank body 1 is at normal pressure regardless of whether the water in the water tank body 1 is at high temperature or low temperature, so as to ensure the structural stability of the water tank body 1.

[0026] One point to note is that the water in the water tank is deionized water, because when the battery stack is working, the interference of charged ions on the battery stack needs to be minimized. The free-moving ions in the deionized water are removed so that the water no longer has free-moving charges, so it will not interfere with the reaction of the battery stack.

[0027] The utility model of the stack cooling water tank, such as Figure 1-Figure 2 As shown, on the basis of the technical solution described above, it can also be that: a first temperature sensor 9 is embedded in the water tank body 1. In this way, the first temperature sensor 9 can monitor the water temperature in the water tank body 1 in real time, so that the processor in the automatic control can compare the water temperature with the working temperature of the battery stack, thereby controlling whether the heating unit 2 is heated and whether the control valve of the heat exchange unit 5 is opened.

[0028] The utility model of the stack cooling water tank, such as Figure 1-Figure 2 As shown, on the basis of the technical solution described above, it can also be that: a conductivity sensor 10 is embedded in the water tank body 1. As mentioned above, the water in the water tank body 1 is deionized water, which may be affected by impurities or other factors during its operation, causing the conductivity of the deionized water to change. At this time, the conductivity sensor 10 can monitor the conductivity of the deionized water in the water tank body 1. Once the conductivity of the deionized water in the water tank body 1 exceeds the safety threshold, an alarm signal can be sent to the automatic control system to prompt the relevant operators to replace the deionized water in the water tank body 1.

[0029] The utility model of the stack cooling water tank, such as Figure 1-Figure 2 As shown, on the basis of the technical solution described above, the heating unit 2 may also include at least one heating rod. In this way, the water in the water tank body 1 is heated by the heating rod. Since the structure of the water tank body 1 is mostly a cylindrical column, after filling with water, the water temperature is generally above the middle of the water tank body 1. The setting position of one heating rod is in the middle and lower part of the water tank body 1. When two heating rods are set, they are generally set in the middle and lower parts of the water tank body 1 respectively. When multiple heating rods are set, they are generally arranged in a ring-shaped distributed manner in the middle and lower parts of the water tank body 1 to achieve the best heating effect and avoid dry burning of the heating rod.

[0030] The utility model of the stack cooling water tank, such as Figure 1-Figure 2As shown, on the basis of the technical solution described above, it can also be that: the bottom of the water tank body 1 is provided with a support leg 11, and the support leg 11 is fixedly connected to the water tank body 1. In this way, since in this solution, the most preferred placement position of the water inlet pipe 6 and the water outlet pipe 7 is the bottom of the water tank body 1, the water inlet pipe 6 and the water outlet pipe 7 at the bottom will cause the water tank body 1 to be unable to be placed stably when the water tank body 1 is placed, and the gravity of the water tank body 1 is directly applied to the water inlet pipe 6 and the water outlet pipe 7, which can easily make the connection between the water inlet pipe 6 and the water outlet pipe 7 and the water tank body 1 time-consuming, so the support leg 11 is provided. On the one hand, the support leg 11 can effectively support the water tank body 1, and on the other hand, the provision of the support leg 11 can provide sufficient installation space for the water inlet pipe 6 and the water outlet pipe 7 to avoid interference.

[0031] The utility model of the stack cooling water tank, such as Figure 1-Figure 2 As shown, on the basis of the technical solution described above, it can also be that: a first Y-type filter 12 is arranged on the outlet pipe 7. In addition, a second Y-type filter 13 is arranged on the return pipe 8. In this way, the first Y-type filter 12 and the second Y-type filter 13 are indispensable filtering devices for the pipeline system of the conveying medium, which are used to remove impurities in the medium to protect the normal use of valves and equipment. The first Y-type filter 12 and the second Y-type filter 13 have the characteristics of advanced structure, small resistance, and convenient sewage discharge. The filter is mainly composed of a connecting pipe, a main pipe, a filter basket, a flange, a flange cover and fasteners. When the liquid enters the filter basket through the main pipe, the solid impurity particles are blocked in the filter basket, and the clean fluid passes through the filter basket and is discharged from the filter outlet.

[0032] The utility model of the stack cooling water tank, such as Figure 1-Figure 2 As shown, on the basis of the technical solution described above, it can also be that: the pipeline connecting the water pump 4 and the heat exchange unit 5 is connected with a pressure relief pipeline 14 and a first pressure sensor 15, the pressure relief pipeline 14 is connected with the water tank body 1, and the pressure relief pipeline 14 is provided with an unloading valve 16. In this way, by providing the pressure relief pipeline 14 and the first pressure sensor 15, when the pressure value of the first pressure sensor 15 exceeds the safety threshold, it indicates that the entire waterway is blocked. If the high-pressure operation is continued, a safety accident is likely to occur. Therefore, when the pressure value of the first pressure sensor 15 exceeds the safety threshold, the unloading valve 16 on the pressure relief pipeline 14 works, so that the water flows back to the water tank through the pressure relief pipeline 14 for pressure relief. At the same time, an early warning can be issued to prompt the operator to check, so as to improve the overall safety of the equipment.

[0033] The utility model of the stack cooling water tank, such as Figure 1-Figure 2As shown, on the basis of the technical solution described above, it can also be that: the heat exchange unit 5 includes a plate heat exchanger 501, a cooling water inlet pipe 502 and a cooling water outlet pipe 503, and the plate heat exchanger 501 is provided with a first channel inlet 504, a first channel outlet 505, a second channel inlet 506 and a second channel outlet 507, the first channel inlet 504 is connected to the water pump 4, the first channel outlet 505 is connected to the battery stack, the second channel inlet 506 is connected to the cooling water inlet pipe 502, the second channel outlet 507 is connected to the cooling water outlet pipe 503, and the cooling water inlet pipe 502 is provided with a proportional valve 508. In this way, deionized water flows through the water pump 4 and enters the plate heat exchanger 501 through the first channel inlet 504, and flows out of the plate heat exchanger from the first channel outlet 505 to form a deionized water path. Cooling water flows through the cooling water inlet pipe 502 and enters the plate heat exchanger 501 through the second channel inlet 506, and flows out of the plate heat exchanger from the second channel outlet 507 to form a cooling water path. The deionized water path and the cooling water path exchange heat in the plate heat exchanger 501. In order to adjust the heat exchange efficiency of the plate heat exchanger 501, a proportional valve 508 is set on the cooling water inlet pipe 502. The proportional valve 508 controls the flow rate of cooling water and thus controls the heat exchange efficiency.

[0034] The utility model of the stack cooling water tank, such as Figure 1-Figure 2 As shown, on the basis of the technical solution described above, it can also be that: the pipeline connecting the heat exchange unit 5 and the fuel cell stack is provided with a second temperature sensor 17 and a second pressure sensor 18, and the return pipe 8 is provided with a third temperature sensor 19 and a third pressure sensor 20. In this way, the second temperature sensor 17 and the second pressure sensor 18 are provided on the pipeline connecting the heat exchange unit 5 and the fuel cell stack, and the third temperature sensor 19 and the third pressure sensor 20 are provided on the return pipe 8, so that the temperature and pressure of the deionized water entering the fuel cell stack and leaving the fuel cell stack can be monitored, so that the automatic control system can automatically control the proportional valve 508 on the cooling water inlet pipe 502.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stack cooling water tank, characterized in that: The invention comprises a water tank body (1), a heating unit (2), a ventilation valve (3), a water pump (4) and a heat exchange unit (5); the water tank body (1) is provided with a water inlet pipe (6), a water outlet pipe (7) and a water return pipe (8); the heating unit (2) and the ventilation valve (3) are both embedded in the water tank body (1); the water tank body (1) is connected to the water pump (4) through the water outlet pipe (7); the water pump (4) is connected to the heat dissipation pipeline inlet of the battery stack through the heat exchange unit (5); and the heat dissipation pipeline outlet of the battery stack is connected to the water tank body (1) through the water return pipe (8).

2. The stack cooling water tank according to claim 1, characterized in that: A first temperature sensor (9) is embedded in the water tank body (1).

3. The stack cooling water tank according to claim 1, characterized in that: The water tank body (1) is embedded with a conductivity sensor (10).

4. The stack cooling water tank according to claim 1, characterized in that: The heating unit (2) comprises at least one heating rod.

5. The stack cooling water tank according to claim 1, characterized in that: A support foot (11) is provided at the bottom of the water tank body (1), and the support foot (11) is fixedly connected to the water tank body (1).

6. The stack cooling water tank according to claim 1, characterized in that: The water outlet pipe (7) is provided with a first Y-shaped filter (12).

7. The stack cooling water tank according to claim 1, characterized in that: The water return pipe (8) is provided with a second Y-type filter (13).

8. The stack cooling water tank according to any one of claims 1 to 7, characterized in that: A pressure relief pipeline (14) and a first pressure sensor (15) are provided on the pipeline connecting the water pump (4) and the heat exchange unit (5); the pressure relief pipeline (14) is in communication with the water tank body (1); and a load relief valve (16) is provided on the pressure relief pipeline (14).

9. The stack cooling water tank according to any one of claims 1 to 7, characterized in that: The heat exchange unit (5) comprises a plate heat exchanger (501), a cooling water inlet pipe (502) and a cooling water outlet pipe (503); the plate heat exchanger (501) is provided with a first channel inlet (504), a first channel outlet (505), a second channel inlet (506) and a second channel outlet (507); the first channel inlet (504) is connected to the water pump (4); the first channel outlet (505) is connected to the battery stack; the second channel inlet (506) is connected to the cooling water inlet pipe (502); the second channel outlet (507) is connected to the cooling water outlet pipe (503); and a proportional valve (508) is provided on the cooling water inlet pipe (502).

10. The stack cooling water tank according to any one of claims 1 to 7, characterized in that: A second temperature sensor (17) and a second pressure sensor (18) are provided on the pipeline connecting the heat exchange unit (5) and the fuel cell stack, and a third temperature sensor (19) and a third pressure sensor (20) are provided on the return water pipe (8).

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