Cooling liquid filling system

Abstract

The utility model provides a cooling liquid filling system, and relates to the technical field of liquid filling equipment, the cooling liquid filling system comprises a liquid filling tank, a vacuum pump, a liquid filling pump, an electromagnetic valve, a one-way valve, a first pipeline, a second pipeline and a third pipeline, one end of the first pipeline is communicated with the upper part of the liquid filling tank, and the other end of the first pipeline is used for being connected with a battery pack liquid cooling pipeline; one end of the second pipeline is communicated with the lower part of the liquid adding tank, the other end of the second pipeline is connected with the first pipeline, the liquid adding pump and the one-way valve are arranged on the second pipeline, one end of the third pipeline is communicated with the upper part of the liquid adding tank, and the other end of the third pipeline is positioned outside the liquid adding tank and is connected with the vacuum pump. Compared with the prior art, the cooling liquid filling system has the advantages that the battery pack liquid cooling pipeline is firstly vacuumized, and then the liquid filling pump is used for filling liquid, so that the filling efficiency is improved, and primary filling can be realized without secondary filling.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid injection equipment, and more specifically, to a coolant filling system. Background Art

[0002] The liquid-cooled prefabricated cabin energy storage system includes a coolant pipeline and a plurality of battery clusters. Each battery cluster contains a plurality of battery packs. Coolant is filled in the coolant pipeline. The flow of the coolant can take away the heat generated by the battery packs, so as to keep the temperature of the battery packs within a suitable range.

[0003] At present, the existing method of filling coolant is to fill the coolant through a high filling port. There is a large amount of air in the pipeline system, which affects the filling efficiency. Moreover, the above filling method often cannot fill up in one filling. It is necessary to wait for the unit to work for a period of time and then fill it again for the second and third times after the air is discharged, and its filling efficiency is relatively low. Summary of the Utility Model

[0004] The problem to be solved by the utility model is: how to improve the filling efficiency of the coolant.

[0005] The utility model provides a coolant filling system, including: a liquid filling tank, a vacuum pump, a liquid filling pump, a solenoid valve, a check valve, a first pipeline, a second pipeline and a third pipeline. One end of the first pipeline is connected to the upper part of the liquid filling tank, and the other end is used to connect to the battery pack liquid cooling pipeline. The solenoid valve is arranged at one end of the first pipeline close to the liquid filling tank. One end of the second pipeline is connected to the lower part of the liquid filling tank, and the other end is connected to the first pipeline. The liquid filling pump and the check valve are both arranged on the second pipeline. One end of the third pipeline is connected to the upper part of the liquid filling tank, and the other end is located outside the liquid filling tank and is connected to the vacuum pump.

[0006] The coolant filling system provided by the utility model has the following beneficial effects compared with the prior art, but is not limited to:

[0007] For the coolant filling system described in this utility model, the liquid filling tank is used to store coolant. One end of the first pipeline connected to the liquid filling tank and one end of the third pipeline connected to the liquid filling tank are both located above the liquid level of the coolant. When using this coolant filling system to fill the coolant into the liquid cooling pipeline of the battery pack, connect the first pipeline to the liquid cooling pipeline of the battery pack, open the solenoid valve on the first pipeline, and at the same time, turn on the vacuum pump on the third pipeline. The air in the liquid cooling pipeline of the battery pack can be discharged through the vacuum pump (the air in the liquid cooling pipeline of the battery pack is discharged successively through the first pipeline, the cavity in the liquid filling tank, and the third pipeline. Since there is a one-way valve on the second pipeline, the air in the liquid cooling pipeline of the battery pack will not enter the second pipeline). After the air in the liquid cooling pipeline of the battery pack is discharged, turn off the vacuum pump and the solenoid valve, and then start the liquid filling pump. The liquid filling pump can discharge the coolant in the liquid filling tank through the second pipeline and the third pipeline to the liquid cooling pipeline of the battery pack successively. After the liquid cooling pipeline of the battery pack is filled, turn off the liquid filling pump. Compared with the prior art, the coolant filling system of this utility model evacuates the liquid cooling pipeline of the battery pack first and then fills the liquid with the liquid filling pump, thus improving the filling efficiency and realizing one-time filling without secondary filling.

[0008] Optionally, this coolant filling system further includes a controller, and the controller is electrically connected to the vacuum pump, the liquid filling pump, and the solenoid valve respectively.

[0009] Optionally, this coolant filling system further includes a time relay, and the time relay is electrically connected to the controller.

[0010] Optionally, this coolant filling system further includes a pressure sensor, and the pressure sensor is arranged on the first pipeline.

[0011] Optionally, this coolant filling system further includes a digital display meter, and the digital display meter is electrically connected to the pressure sensor and the controller respectively.

[0012] Optionally, this coolant filling system further includes a pressure gauge, and the pressure gauge is arranged on the first pipeline and is electrically connected to the controller.

[0013] Optionally, this coolant filling system further includes a flow meter, and the flow meter is arranged on the first pipeline.

[0014] Optionally, one end of the first pipeline connected to the liquid filling tank and one end of the third pipeline connected to the liquid filling tank are both located at the same height of the liquid filling tank and are both higher than the liquid level of the coolant in the liquid filling tank.

[0015] Optionally, this coolant filling system further includes an indicator light, and the indicator light is electrically connected to the controller.

[0016] Optionally, the coolant filling system further includes a function button, and the function button is electrically connected to the controller. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the coolant filling system according to an embodiment of the present invention;

[0018] Description of the Reference Numerals:

[0019] 1. Liquid adding tank; 2. Vacuum pump; 3. Liquid adding pump; 4. Solenoid valve; 5. Check valve; 6. First pipeline; 7. Second pipeline; 8. Third pipeline; 9. Time relay; 10. Pressure sensor; 11. Digital display meter; 12. Pressure gauge; 13. Flowmeter; 14. Indicator light; 15. Function button; 100. Battery pack liquid cooling pipeline. Detailed Embodiments

[0020] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0021] In the description of the present invention, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner", and "outer" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" 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; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] In the description of this specification, the descriptions referring to terms such as "embodiment", "one embodiment", and "one implementation manner" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or implementation manner are included in at least one embodiment or implementation manner of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or implementation manner. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or implementation manners in a suitable manner.

[0024] Moreover, in the attached drawings, the Z-axis represents the vertical direction, that is, the up-and-down position. The positive direction of the Z-axis (i.e., the direction pointed by the arrow of the Z-axis) represents up, and the negative direction of the Z-axis (i.e., the direction opposite to the positive direction of the Z-axis) represents down.

[0025] It should be noted that the above-described meaning represented by the Z-axis is 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. Therefore, it should not be construed as a limitation to the present invention.

[0026] As Figure 1 shown, the coolant filling system of the embodiment of the present invention includes: a liquid filling tank 1, a vacuum pump 2, a liquid filling pump 3, a solenoid valve 4, a check valve 5, a first pipeline 6, a second pipeline 7, and a third pipeline 8. One end of the first pipeline 6 communicates with the upper part of the liquid filling tank 1, and the other end is used to connect with the battery pack liquid cooling pipeline 100. The solenoid valve 4 is arranged at one end of the first pipeline 6 close to the liquid filling tank 1. One end of the second pipeline 7 communicates with the lower part of the liquid filling tank 1, and the other end is connected to the first pipeline 6. The liquid filling pump 3 and the check valve 5 are both arranged on the second pipeline 7. One end of the third pipeline 8 communicates with the upper part of the liquid filling tank 1, and the other end is located outside the liquid filling tank 1 and is connected to the vacuum pump 2.

[0027] In this embodiment, as shown in the attached Figure 1 drawings, the liquid filling tank 1 is used to store coolant (such as ethylene glycol aqueous solution). One end of the first pipeline 6 communicating with the liquid filling tank 1 and one end of the third pipeline 8 communicating with the liquid filling tank 1 are both located above the liquid level of the coolant in the liquid filling tank 1. When using this coolant filling system to fill the battery pack liquid cooling pipeline 100 with coolant, connect the first pipeline 6 to the battery pack liquid cooling pipeline 100, open the solenoid valve 4 on the first pipeline 6, and at the same time open the vacuum pump 2 on the third pipeline 8. The air in the battery pack liquid cooling pipeline 100 can be exhausted through the vacuum pump 2 (the air in the battery pack liquid cooling pipeline 100 is exhausted successively through the first pipeline 6, the cavity in the liquid filling tank 1, and the third pipeline 8. Since the check valve 5 is arranged on the second pipeline 7, the air in the battery pack liquid cooling pipeline 100 will not enter the second pipeline 7). After the air in the battery pack liquid cooling pipeline 100 is exhausted, close the vacuum pump 2 and the solenoid valve 4, and then start the liquid filling pump 3. The liquid filling pump 3 can discharge the coolant in the liquid filling tank 1 to the battery pack liquid cooling pipeline 100 successively through the second pipeline 7 and the third pipeline 8. After the battery pack liquid cooling pipeline 100 is filled with coolant, close the liquid filling pump 3. Compared with the prior art, the coolant filling system of the present invention first evacuates the battery pack liquid cooling pipeline and then fills the liquid with the liquid filling pump, thereby improving the filling efficiency and realizing one-time filling without secondary filling.

[0028] It should be noted that the liquid addition tank 1, the first pipeline 6, the second pipeline 7, and the third pipeline 8 can all be arranged in a chassis. One end of the first pipeline 6 can pass through the chassis and be connected to the battery pack liquid cooling pipeline 100.

[0029] Optionally, the coolant filling system further includes a controller, and the controller is electrically connected to the vacuum pump 2, the liquid addition pump 3, and the solenoid valve 4 respectively.

[0030] In this embodiment, the controller can be a PLC (programmable logic controller), which can be electrically connected to the vacuum pump 2, the liquid addition pump 3, and the solenoid valve 4 through wires respectively to achieve automatic control.

[0031] Optionally, the coolant filling system further includes a time relay 9, and the time relay 9 is electrically connected to the controller.

[0032] In this embodiment, combined with the attached Figure 1 As shown, the evacuation time can be set through the time relay 9, so as to automatically control the start and stop time of the vacuum pump 2.

[0033] Optionally, the coolant filling system further includes a pressure sensor 10, and the pressure sensor 10 is arranged on the first pipeline 6.

[0034] In this embodiment, combined with the attached Figure 1 As shown, a pressure sensor 10 is installed on the first pipeline 6, and the pressure sensor 10 is used to detect the pressure in the first pipeline 6 and the battery pack liquid cooling pipeline 100.

[0035] Optionally, the coolant filling system further includes a digital display meter 11, and the digital display meter 11 is electrically connected to the pressure sensor 10 and the controller respectively.

[0036] In this embodiment, combined with the attached Figure 1 As shown, the pressure value detected by the pressure sensor 10 can be fed back to the digital display meter 11. The vacuum pressure value is set through the digital display meter 11, and the pressure sensor 10 transmits the system pressure value to the digital display meter 11 to control the start and stop of the vacuum pump 2.

[0037] Optionally, the coolant filling system further includes a pressure gauge 12, and the pressure gauge 12 is arranged on the first pipeline 6 and is electrically connected to the controller.

[0038] In this embodiment, combined with the attached Figure 1As shown, the coolant filling system also has a function of maintaining pressure and detecting leaks, and vacuum pressure maintenance or liquid pressure maintenance can be selected. Specifically, a pressure gauge 12 is installed on the first pipeline 6. After the pressure of the pressure gauge 12 reaches the set value, the vacuum pump 2 is powered off and the solenoid valve 4 is closed, and the vacuum pressure maintenance mode can be entered. When the pressure change in the first pipeline 6 is within the permitted range during the pressure maintenance time, the filling mode can be entered. If liquid pressure maintenance is required, the start and stop of the liquid adding pump 3 can be controlled by the pressure setting of the digital display meter 11. After the pressure maintenance is completed, the excess coolant can be returned to the liquid adding tank 1 through the point control of the solenoid valve 4.

[0039] Optionally, the coolant filling system further includes a flow meter 13, and the flow meter 13 is arranged on the first pipeline 6.

[0040] In this embodiment, in combination with the attached Figure 1 As shown, a flow meter 13 is installed on the first pipeline 6, and the start and stop of the liquid adding pump 3 can be manually controlled by viewing the flow rate of the flow meter 13.

[0041] Optionally, one end of the first pipeline 6 communicating with the liquid adding tank 1 and one end of the third pipeline 8 communicating with the liquid adding tank 1 are both at the same height of the liquid adding tank 1 and are both higher than the coolant liquid level in the liquid adding tank 1.

[0042] In this embodiment, in combination with the attached Figure 1 As shown, the coolant in the liquid adding tank 1 cannot completely fill the liquid adding tank 1, and the reserved cavity is used for vacuum pumping. Therefore, one end of the first pipeline 6 communicating with the liquid adding tank 1 and one end of the third pipeline 8 communicating with the liquid adding tank 1 are arranged higher than the coolant liquid level in the liquid adding tank 1, and one end of the first pipeline 6 communicating with the liquid adding tank 1 and one end of the third pipeline 8 communicating with the liquid adding tank 1 can be at the same height of the liquid adding tank 1.

[0043] Optionally, the coolant filling system further includes an indicator light 14, and the indicator light 14 is electrically connected to the controller.

[0044] In this embodiment, in combination with the attached Figure 1 As shown, the coolant filling system further includes an indicator light 14. Two indicator lights 14 can be provided, one of which can be used to display a green light and the other can be used to display a red light. When the pressure change in the first pipeline 6 is within the permitted range during the pressure maintenance time, the green light is on, and the green light on allows the filling mode to be entered (i.e., filling coolant into the battery pack liquid cooling pipeline 100). If the pressure change in the first pipeline 6 exceeds the permitted range, the red light is on, and the red light on does not allow the filling mode to be entered.

[0045] Optionally, the coolant filling system further includes a function button 15, and the function button 15 is electrically connected to the controller.

[0046] In this embodiment, with reference to the attached Figure 1 As shown, the coolant filling system further includes function buttons 15, and specifically, there may be three function buttons 15, namely a liquid filling button, a pressure maintaining button, and a vacuum button. Specifically, after the first pipeline 6 is connected to the battery pack liquid cooling pipeline 100, the vacuum button is turned on, and the solenoid valve 4 is simultaneously turned on to discharge the air in the battery pack liquid cooling pipeline 100. The vacuum pumping time is set through the time relay 9 or the vacuum pressure value is set through the digital display meter 11, and the pressure sensor 10 transmits the pressure value of the first pipeline 6 to the digital display meter 11 to control the start and stop of the vacuum pump 2. When the pressure maintaining button is turned on, after the pressure of the pressure gauge 12 reaches the set value, the vacuum pump 2 is powered off and the solenoid valve 4 is closed, and the vacuum pressure maintaining mode can be entered. When the pressure change in the first pipeline 6 is within the permitted range during the pressure maintaining time, the filling mode can be entered. When the liquid filling button is turned on, the shutdown time of the liquid filling pump 3 can be controlled by setting the liquid filling time, or the start and stop of the liquid filling pump 3 can be manually controlled by checking the flow rate of the flow meter 13.

[0047] The terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0048] Although the present utility model is disclosed as above, the protection scope of the present utility model is not limited thereto. Without departing from the spirit and scope of the present utility model, those skilled in the art can make various changes and modifications, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A coolant filling system, characterized in that, Comprising: A liquid adding tank (1), a vacuum pump (2), a liquid adding pump (3), a solenoid valve (4), a check valve (5), a first pipeline (6), a second pipeline (7) and a third pipeline (8). One end of the first pipeline (6) is communicated with the upper part of the liquid adding tank (1), and the other end is used for connecting with the liquid cooling pipeline (100) of the battery pack. The solenoid valve (4) is arranged at one end of the first pipeline (6) close to the liquid adding tank (1). One end of the second pipeline (7) is communicated with the lower part of the liquid adding tank (1), and the other end is connected to the first pipeline (6). The liquid adding pump (3) and the check valve (5) are both arranged on the second pipeline (7). One end of the third pipeline (8) is communicated with the upper part of the liquid adding tank (1), and the other end is located outside the liquid adding tank (1) and connected to the vacuum pump (2).

2. The coolant filling system according to claim 1, wherein It further includes a controller, and the controller is electrically connected to the vacuum pump (2), the liquid adding pump (3) and the solenoid valve (4) respectively.

3. The coolant filling system according to claim 2, wherein, It further includes a time relay (9), and the time relay (9) is electrically connected to the controller.

4. The coolant filling system according to claim 2, characterized in that, It further includes a pressure sensor (10), and the pressure sensor (10) is arranged on the first pipeline (6).

5. The coolant filling system according to claim 4, wherein It further includes a digital display meter (11), and the digital display meter (11) is electrically connected to the pressure sensor (10) and the controller respectively.

6. The coolant filling system according to claim 2, wherein It further includes a pressure gauge (12), and the pressure gauge (12) is arranged on the first pipeline (6) and is electrically connected to the controller.

7. The coolant filling system according to claim 1, characterized in that, It further includes a flow meter (13), and the flow meter (13) is arranged on the first pipeline (6).

8. The coolant filling system according to claim 1, wherein, One end of the first pipeline (6) communicated with the liquid adding tank (1) and one end of the third pipeline (8) communicated with the liquid adding tank (1) are both at the same height of the liquid adding tank (1) and are both higher than the coolant liquid level in the liquid adding tank (1).

9. The coolant filling system according to claim 2, wherein It further includes an indicator light (14), and the indicator light (14) is electrically connected to the controller.

10. The coolant filling system according to claim 2, wherein It further includes a function button (15), and the function button (15) is electrically connected to the controller.

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