Battery cooling unit cooling water filling method

Abstract

The application belongs to the technical field of battery cooling and discloses a battery cooling unit cooling water filling method, which comprises the following steps: opening a valve at A in a combined ball valve close to a water pump and a valve at a water outlet pipe at C, closing a valve at B between the valve at A and the valve at the water outlet pipe at C; filling cooling liquid into an expansion water tank; when the liquid level in the expansion water tank slowly drops, starting the water pump by using a flap switch; when the water outlet of the valve at the water outlet pipe at C is in a full water state, opening the valve at B, closing the valve at B after 3 seconds; when the water outlet of the valve at the water outlet pipe at C is in the full water state again, closing the valve at A and the valve at the water outlet pipe at C, opening the valve at B, and ensuring that the filling is completed by running the system for 2 minutes; and closing the water pump by using the flap switch, and removing the expansion water tank and a pipeline between the expansion water tank and the combined ball valve. The application solves the problems that high-position operation is needed and the battery cooling system pipeline needs to be vacuumized.

Description

Technical Field

[0001] This invention belongs to the field of battery cooling technology, and specifically relates to a method for adding cooling water to a battery cooling unit. Background Technology

[0002] As one of the core components of electric buses, the power battery needs to operate stably within a suitable temperature range. Therefore, the cooling of the battery system is particularly important for the battery's lifespan and usage. Due to structural limitations, the battery pack is mostly housed in the vehicle's skirt, while the battery cooling system is located on the roof. Coolant filling requires a high-level and pressurized operation, which is unsafe and inconvenient. Furthermore, water pressure is needed to purge air from the pipes during the filling process, which is time-consuming.

[0003] Therefore, providing a method for adding cooling water to a battery cooling unit, so as to achieve coolant addition at a low position, is an urgent problem to be solved. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for adding cooling water to a battery cooling unit, which allows water to be added at a low level using a built-in high-lift water pump, a combination valve, and a rocker switch.

[0005] In a first aspect, the present invention provides a method for adding cooling water to a battery cooling unit, the method comprising:

[0006] Step 1: Open valve A in the combination ball valve near the water pump and valve C at the outlet pipe, and close valve B between valve A and valve C at the outlet pipe.

[0007] Step 2: The valve at point C, where the water outlet pipe is located, directly directs the water flow into the liquid recovery tank;

[0008] Step 3: Add coolant to the expansion tank. When the coolant level in the expansion tank drops slowly, turn on the water pump using the rocker switch.

[0009] Step 4: When the outlet of the valve at point C is full of water, open the valve at point B, and close the valve at point B after 3 seconds.

[0010] Step 5: When the outlet of the valve at point C is full of water again, close the valve at point A and the valve at point C, open the valve at point B, and run the system for 2 minutes to ensure that the filling is complete.

[0011] Step 6: Turn off the water pump using the rocker switch, and disconnect the expansion tank and the pipeline between the expansion tank and the combination ball valve.

[0012] Specifically, the transparent portion of the side wall of the expansion tank is marked with scales indicating the volume of coolant in the expansion tank, and is equipped with MAX and MIN level indicators.

[0013] Specifically, in step 3, coolant is slowly added to the expansion tank's filling port. When the coolant reaches the MAX upper limit of the expansion tank, the adding is stopped and the tank is left to stand for one minute. Then, the water pump is turned on using the rocker switch.

[0014] Specifically, the bottom of the liquid recovery tank is provided with a drain port, and a drain valve is provided at the drain port.

[0015] Specifically, before shutting down the water pump, it checks whether the inlet and outlet water pressure of the battery engine matches the preset water pressure calibration value. If they match, the venting is completed and the water pump is shut down; if they do not match, the water pump speed is increased according to the preset speed and the water pump continues to run.

[0016] Specifically, the preset speed increase of the water pump is 1000 rpm each time.

[0017] Specifically, before proceeding to step 1, first select the vehicle model for which coolant needs to be added in the coolant filling system, and then call up the calibrated filling amount corresponding to the vehicle model for which coolant needs to be added.

[0018] Specifically, adjust the MAX upper limit according to the calibrated filling volume.

[0019] Secondly, the present invention provides a battery cooling unit cooling water filling system, the system comprising: an expansion tank, a battery system, a combination ball valve, a water pump, a rocker switch, and a battery cooling unit.

[0020] Open valve A in the combination ball valve near the water pump, and valve C at the outlet pipe. Close valve B between valve A and valve C at the outlet pipe.

[0021] The valve at point C, where the water outlet pipe is located, directly directs the water flow into the liquid recovery tank.

[0022] Add coolant to the expansion tank. When the coolant level in the expansion tank drops slowly, turn on the water pump using the rocker switch.

[0023] When the outlet of the valve at point C is full of water, open the valve at point B, and close the valve at point B after 3 seconds.

[0024] When the outlet of the valve at point C is full of water again, close the valves at points A and C, and open the valve at point B. Run the system for 2 minutes to ensure that the filling is complete.

[0025] Turn off the water pump using the rocker switch, and disconnect the expansion tank and the pipeline between the expansion tank and the combination ball valve.

[0026] Thirdly, the present invention provides a computer storage medium storing program instructions, wherein the program instructions, when executed, control the device where the computer storage medium is located to perform any of the methods described above.

[0027] This invention discloses a method for adding cooling water to a battery cooling unit. The method uses a built-in high-lift water pump, a combination valve, and a rocker switch to add coolant at a low position. When the liquid level in the expansion tank drops slowly, the water pump is turned on. After the cooling water is added, the water pump is turned off. This reduces the risk of working on the vehicle roof, improves the efficiency of adding coolant, and eliminates the need for a vacuum pump, thus reducing the cost of the equipment. Attached Figure Description

[0028] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of a battery cooling unit cooling water filling system according to the present invention;

[0030] Figure 2 This is a flowchart of an embodiment of a battery cooling unit cooling water filling method according to the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the specific embodiments described herein are merely illustrative of the invention and represent only a portion, not all, of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0032] An embodiment of the cooling water filling system for a battery cooling unit according to the present invention is shown in the schematic diagram below. Figure 1 As shown, it includes an expansion tank, battery system, combination ball valve, water pump, rocker switch, battery cooling unit, pipelines, etc.

[0033] Open valve A in the combination ball valve near the water pump, and valve C at the outlet pipe. Close valve B between valve A and valve C at the outlet pipe.

[0034] The valve at point C, where the water outlet pipe is located, directly directs the water flow into the liquid recovery tank.

[0035] Specifically, the bottom of the liquid recovery tank is provided with a drain port, and a drain valve is provided at the drain port.

[0036] After the expansion tank fills the cooling pipes with coolant, a drain port can be opened at the bottom of the liquid recovery tank to allow the waste liquid accumulated inside to be discharged. A drain valve is installed at the drain port, and the waste liquid in the liquid recovery tank can be discharged by opening the drain valve. Specifically, the outlet of the drain valve is exposed outside the liquid recovery tank, while the rest of the drain valve is located inside the liquid recovery tank. When it is necessary to discharge waste liquid, a quick connector with a hose can be connected to the drain valve.

[0037] Add coolant to the expansion tank. When the coolant level in the expansion tank drops slowly, turn on the water pump using the rocker switch.

[0038] Specifically, before adding coolant, select the vehicle model for which coolant needs to be added in the system, and then call up the calibrated addition amount corresponding to the vehicle model.

[0039] To facilitate the addition of coolant to different vehicle models, the vehicle model can be selected before adding coolant. This allows the addition controller to access the parameter data corresponding to that vehicle model stored in the controller, such as the calibrated addition amount and preset speed.

[0040] Specifically, the transparent portion of the side wall of the expansion tank is marked with graduations to indicate the volume of coolant inside, and includes MAX and MIN level indicators. The MAX and MIN level indicators are movable for easy adjustment.

[0041] To facilitate determining the accuracy of the coolant level added to the cooling pipes by the expansion tank, and to ascertain whether excessive air remains in the cooling pipes after adding coolant, a scale indicating the coolant capacity is marked on the transparent portion of the expansion tank's side wall. By reading the coolant capacity scale before and after adding coolant, the accuracy of the coolant level added to the cooling pipes can be accurately determined. When the coolant level is confirmed to be accurate, it indicates that almost no air remains in the cooling pipes, and the coolant filling process can then be completed.

[0042] Specifically, in step 3, coolant is slowly added to the expansion tank's filling port. When the coolant reaches the MAX upper limit of the expansion tank, the adding is stopped and the tank is left to stand for one minute. Then, the water pump is turned on using the rocker switch.

[0043] When the outlet of the valve at point C is full of water, open the valve at point B, and close the valve at point B after 3 seconds.

[0044] When the outlet of the valve at point C is full of water again, close the valves at points A and C, and open the valve at point B. Run the system for 2 minutes to ensure that the filling is complete.

[0045] Turn off the water pump using the rocker switch, and disconnect the expansion tank and the pipeline between the expansion tank and the combination ball valve.

[0046] Specifically, before shutting down the water pump, it is checked whether the inlet and outlet water pressures of the battery motor match the preset water pressure calibration values. If they match, the venting is completed and the water pump is shut down; if they do not match, the water pump speed is increased according to the preset speed, and the water pump continues to run. After running for a time T, the check is performed again. The running time T is set by those skilled in the art based on experience.

[0047] by Figure 1 Taking the battery cooling unit cooling water filling system as an example, the cooling water filling method of the battery cooling unit of the present invention will be described.

[0048] Figure 2 The diagram shown is a flowchart of an embodiment of a battery cooling unit cooling water filling method provided by the present invention. The flowchart specifically includes:

[0049] This invention provides a method for adding cooling water to a battery cooling unit, the method comprising:

[0050] Step 1: Open valve A in the combination ball valve near the water pump and valve C at the outlet pipe, and close valve B between valve A and valve C at the outlet pipe.

[0051] Specifically, before proceeding to step 1, first select the vehicle model for which coolant needs to be added in the coolant filling system, and then call up the calibrated filling amount corresponding to the vehicle model for which coolant needs to be added.

[0052] To facilitate the addition of coolant to different vehicle models, the vehicle model can be selected before adding coolant. This allows the addition controller to access the parameter data corresponding to that vehicle model stored in the controller, such as the calibrated addition amount and preset speed.

[0053] Step 2: The valve at point C, where the water outlet pipe is located, directly directs the water into the liquid recovery tank.

[0054] Specifically, the bottom of the liquid recovery tank is provided with a drain port, and a drain valve is provided at the drain port.

[0055] After the expansion tank fills the cooling pipes with coolant, a drain port can be opened at the bottom of the liquid recovery tank to allow the waste liquid accumulated inside to be discharged. A drain valve is installed at the drain port, and the waste liquid in the liquid recovery tank can be discharged by opening the drain valve. Specifically, the outlet of the drain valve is exposed outside the liquid recovery tank, while the rest of the drain valve is located inside the liquid recovery tank. When it is necessary to discharge waste liquid, a quick connector with a hose can be connected to the drain valve.

[0056] Step 3: Add coolant to the expansion tank. When the coolant level in the expansion tank drops slowly, turn on the water pump using the rocker switch.

[0057] Specifically, the transparent portion of the side wall of the expansion tank is marked with graduations to indicate the volume of coolant inside, and includes MAX and MIN level indicators. The MAX and MIN level indicators are movable for easy adjustment.

[0058] To facilitate determining the accuracy of the coolant level added to the cooling pipes by the expansion tank, and to ascertain whether excessive air remains in the cooling pipes after adding coolant, a scale indicating the coolant capacity is marked on the transparent portion of the expansion tank's side wall. By reading the coolant capacity scale before and after adding coolant, the accuracy of the coolant level added to the cooling pipes can be accurately determined. When the coolant level is confirmed to be accurate, it indicates that almost no air remains in the cooling pipes, and the coolant filling process can then be completed.

[0059] Specifically, the MAX upper limit is adjusted according to the rated fill volume. Different vehicle models have different rated fill volumes, which are the MAX upper limit of coolant to be added for the corresponding vehicle model.

[0060] Specifically, in step 3, coolant is slowly added to the expansion tank's filling port. When the coolant reaches the MAX upper limit of the expansion tank, the adding is stopped and the tank is left to stand for one minute. Then, the water pump is turned on using the rocker switch.

[0061] Step 4: When the outlet of the valve at point C is full of water, open the valve at point B, and close the valve at point B after 3 seconds.

[0062] Step 5: When the outlet of the valve at point C is full of water again, close the valve at point A and the valve at point C, and open the valve at point B. Run the system for 2 minutes to ensure that the filling is complete.

[0063] Step 6: Turn off the water pump using the rocker switch, and disconnect the expansion tank and the pipeline between the expansion tank and the combination ball valve.

[0064] Specifically, before shutting down the water pump, it is checked whether the inlet and outlet water pressures of the battery motor match the preset water pressure calibration values. If they match, the venting is completed and the water pump is shut down; if they do not match, the water pump speed is increased according to the preset speed, and the water pump continues to run. After running for a time T, the check is performed again. The running time T is set by those skilled in the art based on experience.

[0065] This embodiment uses a stepped increase in the speed of the water pump to complete the venting, thereby improving the efficiency of coolant filling.

[0066] Specifically, the preset speed increase of the water pump is 1000 rpm each time.

[0067] For ease of control, in this embodiment, the preset speed increase of the water pump is 1000 rpm each time; it can also be other speed values, such as 500 rpm or 1500 rpm. The smaller the speed value, the longer it takes to adjust to the maximum speed, but it is easier to control the exhaust.

[0068] According to another aspect of the present invention, a computer storage medium is provided, which stores program instructions, wherein the program instructions, when executed, control the device where the computer storage medium is located to perform any of the methods described above.

[0069] The above-described embodiments merely illustrate preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for adding cooling water to a battery cooling unit, characterized in that, The method is implemented through a battery cooling unit cooling water filling system. The filling system includes an expansion tank, a battery system, a combination ball valve, a water pump, a rocker switch, and a battery cooling unit. The combination ball valve is connected to the expansion tank via a valve at point A, and is also connected to a liquid recovery tank and the battery cooling unit via a valve at the outlet pipe at point C. The water pump is connected to the combination ball valve, the rocker switch, and the water-cooled battery. The method includes: Step 1: Open valve A in the combination ball valve near the water pump and valve C at the outlet pipe, and close valve B between valve A and valve C at the outlet pipe. Step 2: The valve at point C, where the water outlet pipe is located, directly directs the water flow into the liquid recovery tank; Step 3: Add coolant to the expansion tank. When the coolant level in the expansion tank drops slowly, turn on the water pump using the rocker switch. Specifically, slowly add coolant to the filling port of the expansion tank. When the coolant reaches the MAX upper limit of the expansion tank, stop adding coolant and let it stand for one minute before turning on the water pump using the rocker switch. Step 4: When the outlet of the valve at point C is full of water, open the valve at point B, and close the valve at point B after 3 seconds. Step 5: When the outlet of the valve at point C is full of water again, close the valve at point A and the valve at point C, open the valve at point B, and run the system for 2 minutes to ensure that the filling is complete. Step 6: Use the rocker switch to turn off the water pump, and disconnect the expansion tank and the pipeline between the expansion tank and the combination ball valve; Before shutting down the water pump, check whether the inlet and outlet water pressure of the battery motor matches the preset water pressure calibration value. If they match, the venting is complete and the water pump is shut down. If they do not match, increase the water pump speed according to the preset speed and continue running the water pump. After running for a time T, check again. The running time T is set based on experience.

2. The method for adding cooling water to a battery cooling unit according to claim 1, characterized in that, The transparent portion of the side wall of the expansion tank is marked with scales to indicate the volume of coolant in the expansion tank, and is equipped with MAX and MIN level indicators.

3. The method for adding cooling water to a battery cooling unit according to claim 1, characterized in that, The bottom of the liquid recovery tank is equipped with a drain port, and a drain valve is installed at the drain port.

4. The method for adding cooling water to a battery cooling unit according to claim 3, characterized in that, The preset speed increase of the water pump is 1000 rpm each time.

5. The method for adding cooling water to a battery cooling unit according to claim 4, characterized in that, Before proceeding to step 1, first select the vehicle model for which coolant needs to be added in the coolant filling system, and then call up the calibrated filling volume corresponding to the vehicle model for which coolant needs to be added.

6. The method for adding cooling water to a battery cooling unit according to claim 5, characterized in that, Adjust the MAX upper limit according to the calibrated filling volume.

7. A computer storage medium, characterized in that, The computer storage medium stores program instructions, wherein when the program instructions are executed, they control the device where the computer storage medium is located to perform the method described in any one of claims 1 to 6.

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