Automatic liquid supplementing device and energy storage liquid cooling system

Abstract

The utility model belongs to the technical field of energy storage, and discloses an automatic liquid supplementing device and an energy storage liquid cooling system, and the automatic liquid supplementing device is used for supplementing cooling liquid to a liquid path device of the energy storage liquid cooling system. The automatic liquid supplementing device comprises a liquid tank, a liquid supplementing pump and a pressure sensor, the liquid tank is used for storing cooling liquid and provided with a liquid conveying pipe, a liquid supplementing opening and a liquid observing window, the liquid observing window is used for observing the liquid level height in the liquid tank, the liquid supplementing opening is used for supplementing the cooling liquid into the liquid tank, and a liquid inlet of the liquid supplementing pump is communicated with the liquid conveying pipe; a liquid outlet of the liquid supplementing pump is connected with the liquid path device so as to supplement cooling liquid towards the liquid path device, and the pressure sensor is installed on the liquid path device and used for detecting the liquid pressure in the liquid path device. The automatic liquid supplementing device can automatically supplement cooling liquid to the liquid path device of the energy storage liquid cooling system, manual liquid supplementing flow is not needed, the probability of gas mixing in the liquid supplementing process can be reduced, and the working reliability of the energy storage liquid cooling system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to an automatic liquid replenishing device and an energy storage liquid cooling system. Background Art

[0002] Energy storage liquid cooling system is an efficient battery thermal management system, mainly used in electrochemical energy storage systems, such as lithium-ion battery energy storage systems. The system cools the battery by circulating a high thermal conductivity coolant to remove the heat from the battery, so as to maintain the normal operation of the battery within the operating temperature range, thereby improving the battery's service life and safety performance.

[0003] The current energy storage liquid cooling system may have too low circulating liquid medium pressure due to factors such as ambient temperature and system maintenance, which may lead to a decrease in the performance of the energy storage liquid cooling system. However, there are some problems with the traditional manual refilling method. For example, the gas in the pipeline will be brought in during refilling, and the air in the unit itself cannot be quickly discharged, resulting in gas accumulation and affecting the performance of the unit. In addition, the refilling process needs to be supervised throughout the process, and the refilling process needs to be manually controlled, which is cumbersome, time-consuming and labor-intensive. Utility Model Content

[0004] The first purpose of the utility model is to provide an automatic liquid replenishing device, which can automatically replenish coolant to the liquid circuit device of the energy storage liquid cooling system without the need for manual liquid replenishing process, and can reduce the probability of gas mixing during the liquid replenishing process, thereby ensuring the working reliability of the energy storage liquid cooling system.

[0005] The second purpose of the utility model is to provide an energy storage liquid cooling system, which can automatically replenish coolant during operation without the need for manual refilling process, and can reduce the probability of gas mixing during the refilling process, thereby ensuring the working reliability of the energy storage liquid cooling system.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses an automatic fluid replenishing device, which is used to replenish coolant toward a fluid path device of an energy storage liquid cooling system, and the automatic fluid replenishing device comprises: a liquid tank, which is used to store the coolant, and the liquid tank has an infusion tube, a fluid replenishing port and a liquid viewing window, the liquid viewing window is used to observe the liquid level height in the liquid tank, and the fluid replenishing port is used to replenish the coolant toward the liquid tank; a fluid replenishing pump, the fluid inlet of the fluid replenishing pump is connected with the infusion tube, and the fluid outlet of the fluid replenishing pump is connected with the fluid path device to replenish the coolant toward the fluid path device; a pressure sensor, the pressure sensor is installed on the fluid path device, and is used to detect the liquid pressure in the fluid path device.

[0008] In some embodiments, the automatic liquid replenishing device further includes a one-way valve, which is installed between the liquid outlet and the liquid path device, and the one-way valve is configured to only allow the coolant to flow from the liquid outlet to the liquid path device.

[0009] In some embodiments, there are multiple liquid viewing windows, and the multiple liquid viewing windows are arranged at intervals along the height direction of the liquid tank.

[0010] In some embodiments, the automatic liquid replenishing device includes a liquid level sensor and an alarm. The detection end of the liquid level sensor extends into the liquid tank, the liquid level sensor is electrically connected to the alarm, and the alarm is configured to give an alarm when the liquid level sensor detects that the liquid level inside the liquid tank is lower than a specified height.

[0011] In some specific embodiments, the alarm includes a buzzer and / or an indicator light.

[0012] In some embodiments, the liquid tank has a liquid replenishing pipe arranged around the liquid replenishing port, and the liquid tank further includes a sealing plug for sealing the liquid replenishing pipe.

[0013] In some embodiments, the liquid tank has a liquid replenishing pipe arranged around the liquid replenishing port, and the liquid tank further includes an overflow pipe communicated with the liquid replenishing pipe.

[0014] In some embodiments, a plurality of first mounting ears are provided at the bottom of the liquid tank, and at least one first fixing hole is provided on each first mounting ear. A first connecting member passes through the first fixing hole to mount the liquid tank on an external bracket.

[0015] In some embodiments, at least one second mounting ear is provided on the liquid replenishing pump, and at least one second fixing hole is provided on each second mounting ear. A second connecting member passes through the second fixing hole to mount the liquid replenishing pump on an external bracket.

[0016] The present utility model also discloses an energy storage liquid cooling system, which includes a cold source device, a liquid path device and the automatic liquid replenishing device described above. The liquid path device is connected to the cold source device and the heat exchanger of the energy storage battery to form a cooling loop, and the automatic liquid replenishing device is used to replenish coolant to the liquid path device.

[0017] Advantages of the automatic liquid replenishment device of the present utility model: During the actual working process, when the pressure sensor detects that the liquid pressure in the liquid path device is lower than the specified value, it indicates that the coolant in the liquid path device is insufficient. At this time, the liquid replenishment pump starts. The liquid replenishment pump can pump out the coolant stored in the liquid tank and then send it into the liquid path device until the pressure sensor detects that the liquid pressure in the liquid path device reaches or is higher than the specified value, and then the liquid replenishment pump shuts down to complete the liquid replenishment. The entire liquid replenishment process is automated, greatly reducing the need for manual intervention, improving the efficiency and quality of the coolant replenishment operation of the energy storage liquid cooling system. Moreover, the automatic liquid replenishment operation can also reduce the probability of gas mixing during the liquid replenishment process, ensuring the working reliability of the energy storage liquid cooling system. In addition, since the liquid tank is also provided with a liquid replenishment port and a liquid level viewing window, on-site maintenance personnel can open the liquid replenishment port to perform the liquid replenishment operation on the liquid tank and can observe the coolant capacity in the liquid tank through the liquid level viewing window, thus facilitating the liquid replenishment.

[0018] Advantages of the energy storage liquid cooling system of the present utility model: Due to having the automatic liquid replenishment device described above, during the actual working process, when the pressure sensor detects that the liquid pressure in the liquid path device is lower than the specified value, it indicates that the coolant in the liquid path device is insufficient. At this time, the liquid replenishment pump starts. The liquid replenishment pump can pump out the coolant stored in the liquid tank and then send it into the liquid path device until the pressure sensor detects that the liquid pressure in the liquid path device reaches or is higher than the specified value, and then the liquid replenishment pump shuts down to complete the liquid replenishment. The entire liquid replenishment process is automated, greatly reducing the need for manual intervention, improving the efficiency and quality of the coolant replenishment operation of the energy storage liquid cooling system. Moreover, the automatic liquid replenishment operation can also reduce the probability of gas mixing during the liquid replenishment process, ensuring the working reliability of the energy storage liquid cooling system.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the automatic liquid replenishment device according to an embodiment of the present utility model;

[0021] Figure 2 is a structural block diagram of the energy storage liquid cooling system according to an embodiment of the present utility model.

[0022] Reference Signs:

[0023] 100, automatic liquid replenishment device; 110, liquid tank; 111, liquid level viewing window; 112, liquid delivery pipe; 113, liquid replenishment pipe; 114, sealing plug; 115, overflow pipe; 116, liquid level sensor; 117, first mounting ear;

[0024] 120. Liquid supplement pump; 121. Second mounting ear; 130. Pressure sensor; 140. Check valve;

[0025] 200. Cold source device; 300. Liquid path device; 400. Energy storage battery; 500. Heat exchanger. Specific embodiments

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0027] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "above and on" the second feature includes the first feature being directly above and diagonally above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and to the left", and "below and on" the second feature includes the first feature being directly below and diagonally below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0029] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] The present utility model discloses an automatic liquid supplement device 100, and the automatic liquid supplement device 100 is used to supplement coolant to the liquid path device 300 of the energy storage liquid cooling system. Refer to Figure 1As shown, the automatic liquid replenishing device 100 includes a liquid tank 110, a liquid replenishing pump 120, and a pressure sensor 130. The liquid tank 110 is used to store the coolant. The liquid tank 110 has an infusion tube 112, a liquid replenishing port, and a liquid viewing window 111. The liquid viewing window 111 is used to observe the liquid level height in the liquid tank 110. The liquid replenishing port is used to supplement the coolant into the liquid tank 110. The inlet of the liquid replenishing pump 120 is communicated with the infusion tube 112, and the outlet of the liquid replenishing pump 120 is connected to the liquid path device 300 to supplement the coolant to the liquid path device 300. The pressure sensor 130 is installed in the liquid path device 300 and is used to detect the liquid pressure in the liquid path device 300.

[0031] It can be understood that during the actual working process, when the pressure sensor 130 detects that the liquid pressure in the liquid path device 300 is lower than the specified value, it indicates that the coolant in the liquid path device 300 is insufficient. At this time, the liquid replenishing pump 120 is started. The liquid replenishing pump 120 can pump out the coolant stored in the liquid tank 110 and then send it into the liquid path device 300 until the pressure sensor 130 detects that the liquid pressure in the liquid path device 300 reaches or is higher than the specified value, and then the liquid replenishing pump 120 is turned off to complete the liquid replenishment. The entire liquid replenishment process is automated, greatly reducing the need for manual intervention, improving the efficiency and quality of the coolant replenishment operation of the energy storage liquid cooling system, and the operation of automatic liquid replenishment can also reduce the probability of gas mixing during the liquid replenishment process, ensuring the working reliability of the energy storage liquid cooling system. In addition, since the liquid tank 110 is also provided with a liquid replenishing port and a liquid viewing window 111, on-site maintenance personnel can open the liquid replenishing port to perform the liquid replenishment operation on the liquid tank 110, and can observe the coolant capacity in the liquid tank 110 through the liquid viewing window 111, thus facilitating the liquid replenishment.

[0032] It should be further noted that the automatic liquid replenishing device 100 of this embodiment further includes a control mechanism, and the control mechanism is electrically connected to the liquid replenishing pump 120 and the pressure sensor 130. The control mechanism can be a centralized or distributed controller. For example, the controller can be a single microcontroller, or can be composed of multiple distributed microcontrollers, and a control program can run in the microcontroller. The specific composition and control logic of the control mechanism are prior art, and the control mechanism will not be described in detail here.

[0033] Reference Figure 1 As shown, the automatic liquid replenishing device 100 further includes a check valve 140. The check valve 140 is installed between the outlet and the liquid path device 300, and the check valve 140 is configured to only allow the coolant to flow from the outlet to the liquid path device 300. It can be understood that the check valve 140 being configured to only allow the coolant to flow from the outlet to the liquid path device 300 can prevent the phenomenon of coolant backflow in the liquid path device 300 and prevent the coolant in the liquid path device 300 from entering the interior of the automatic liquid replenishing device 100.

[0034] Optionally, referenceFigure 1 As shown, there are multiple sight liquid windows 111, and the multiple sight liquid windows 111 are arranged at intervals along the height direction of the liquid tank 110. It can be understood that setting the sight liquid windows 111 at different heights facilitates the operator to observe the coolant capacity in the liquid tank 110, so as to facilitate the replenishment operation when the liquid level in the liquid tank 110 is lower than the specified height.

[0035] Optionally, the automatic liquid replenishment device 100 includes a liquid level sensor 116 and an alarm (not shown in the figure). The detection end of the liquid level sensor 116 extends into the interior of the liquid tank 110. The liquid level sensor 116 is electrically connected to the alarm, and the alarm is configured to give an alarm when the liquid level sensor 116 detects that the liquid level inside the liquid tank 110 is too low. It can be understood that when the liquid level sensor 116 detects that the liquid level of the coolant in the liquid tank 110 is lower than the set value, the liquid level sensor 116 sends a liquid shortage warning of the liquid tank 110 to the control mechanism, and the alarm emits an alarm signal, so that the maintenance personnel can manually replenish the coolant to the liquid tank 110 to ensure that there is always sufficient coolant in the liquid tank 110.

[0036] It should be further noted that when the pressure sensor 130 detects that the liquid pressure in the liquid path device 300 is lower than the preset value, and the liquid level sensor 116 detects that the liquid level of the coolant in the liquid tank 110 is too low, a signal indicating that the water pressure of the liquid path device 300 is too low and the liquid tank 110 lacks coolant is sent to the control mechanism. After the control mechanism combines the two signals, a recommended shutdown instruction is sent to the energy storage liquid cooling system to remind the operator to go to the site to check whether there are abnormal situations such as coolant leakage.

[0037] Optionally, the alarm includes a buzzer and / or an indicator light. In some embodiments, the alarm includes a buzzer; in some embodiments, the alarm includes an indicator light; in some embodiments, the alarm includes a buzzer and an indicator light. Of course, in other embodiments of the present invention, the alarm can also select other structures according to actual needs, and is not limited to the above limitations.

[0038] Optionally, referring to Figure 1 As shown, the liquid tank 110 has a liquid replenishment pipe 113 arranged around the liquid replenishment port, and the liquid tank 110 further includes a sealing plug 114 for sealing the liquid replenishment pipe 113. It can be understood that during normal operation, the sealing plug 114 seals the liquid replenishment pipe 113 to prevent external contaminants from falling into the liquid tank 110, ensuring that the coolant in the liquid tank 110 is relatively clean, and indirectly ensuring the cleanliness of the coolant in the liquid path device 300.

[0039] Optionally, the liquid tank 110 further includes an overflow pipe 115 communicating with the liquid replenishment pipe 113. It can be understood that when replenishing the coolant into the liquid tank 110, the excess liquid can flow out from the overflow pipe 115, facilitating the liquid replenishment operation.

[0040] Optionally, a plurality of first mounting lugs 117 are provided at the bottom of the liquid tank 110, and at least one first fixing hole is provided on each first mounting lug 117. The first connecting member passes through the first fixing hole to mount the liquid tank 110 on an external bracket. It can be understood that during the actual installation process, the liquid tank 110 can be mounted on the external bracket through a plurality of first connecting members. The external bracket can be the overall bracket in the energy storage liquid cooling system for supporting the cold source device 200 and the heat exchanger 500, or it can be a separate bracket for supporting the liquid tank 110, which can be specifically selected according to actual needs. The method of fixing the liquid tank 110 through the first connecting member can, on the one hand, facilitate the user to install the automatic liquid replenishing device 100, and on the other hand, ensure the installation stability of the liquid tank 110, avoiding the occurrence of coolant leakage caused by the shaking of the liquid tank 110.

[0041] Optionally, at least one second mounting lug 121 is provided on the liquid replenishing pump 120, and at least one second fixing hole is provided on each second mounting lug 121. The second connecting member passes through the second fixing hole to mount the liquid replenishing pump 120 on an external bracket. It can be understood that during the actual installation process, the liquid replenishing pump 120 can be mounted on the external bracket through a plurality of second connecting members. The external bracket can be the overall bracket in the energy storage liquid cooling system for supporting the cold source device 200 and the heat exchanger 500, or it can be a separate bracket for supporting the liquid replenishing pump 120, which can be specifically selected according to actual needs. The method of fixing the liquid replenishing pump 120 through the second connecting member can, on the one hand, facilitate the user to install the automatic liquid replenishing device 100, and on the other hand, ensure the installation stability of the liquid replenishing pump 120, avoiding the occurrence of coolant leakage caused by the shaking of the liquid replenishing pump 120.

[0042] The present utility model also discloses an energy storage liquid cooling system, which includes a cold source device 200, a liquid circuit device 300 and the aforementioned automatic liquid replenishing device 100. The liquid circuit device 300 is connected to the cold source device 200 and the heat exchanger 500 of the energy storage battery 400 to form a cooling circuit. The automatic liquid replenishing device 100 is used to replenish the coolant towards the liquid circuit device 300. It can be understood that due to the aforementioned automatic liquid replenishing device 100, during the actual working process, when the pressure sensor 130 detects that the liquid pressure in the liquid circuit device 300 is lower than the specified value, it indicates that the coolant in the liquid circuit device 300 is insufficient. At this time, the liquid replenishing pump 120 is started. The liquid replenishing pump 120 can pump out the coolant stored in the liquid tank 110 and then send it into the liquid circuit device 300 until the pressure sensor 130 detects that the liquid pressure in the liquid circuit device 300 reaches or is higher than the specified value, and then the liquid replenishing pump 120 is turned off to complete the liquid replenishment. The entire liquid replenishment process is automated, greatly reducing the need for manual intervention, improving the efficiency and quality of the coolant replenishment operation of the energy storage liquid cooling system, and the operation of automatic liquid replenishment can also reduce the probability of gas mixing during the liquid replenishment process, ensuring the working reliability of the energy storage liquid cooling system.

[0043] Optionally, the pressure sensor 130 is installed on the liquid inlet pipeline of the heat exchanger 500. Thus, during the actual working process, the pressure measured by the pressure sensor 130 is the liquid inlet pressure of the heat exchanger 500, and the liquid inlet pressure can better represent the flow rate of the coolant in the entire liquid circuit device 300, thereby realizing the function that the automatic liquid replenishing device 100 can accurately replenish the liquid.

[0044] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] Obviously, the above-mentioned embodiments of the present utility model are merely examples given to clearly illustrate the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. An automatic liquid replenishing device, characterized in that: The automatic liquid replenishing device is used to replenish cooling liquid toward the liquid circuit device (300) of the energy storage liquid cooling system, and the automatic liquid replenishing device comprises: A liquid tank (110), the liquid tank (110) being used to store the cooling liquid, the liquid tank (110) comprising a liquid infusion tube (112), a liquid replenishing port and a liquid viewing window (111), the liquid viewing window (111) being used to observe the liquid level in the liquid tank (110), and the liquid replenishing port being used to replenish the cooling liquid into the liquid tank (110); a fluid replenishment pump (120), wherein a fluid inlet of the fluid replenishment pump (120) is connected to the fluid infusion tube (112), and a fluid outlet of the fluid replenishment pump (120) is connected to the fluid path device (300) so as to replenish the coolant toward the fluid path device (300); A pressure sensor (130), the pressure sensor (130) is installed in the fluid path device (300) and is used to detect the fluid pressure in the fluid path device (300).

2. The automatic liquid replenishing device according to claim 1, characterized in that: The automatic liquid replenishing device also includes a one-way valve (140), which is installed between the liquid outlet and the liquid path device (300), and the one-way valve (140) is configured to only allow the coolant to flow from the liquid outlet to the liquid path device (300).

3. The automatic liquid replenishing device according to claim 1, characterized in that: There are a plurality of liquid viewing windows (111), and the plurality of liquid viewing windows (111) are arranged at intervals along the height direction of the liquid tank (110).

4. The automatic liquid replenishing device according to claim 1, characterized in that: The automatic liquid replenishing device comprises a liquid level sensor (116) and an alarm, wherein a detection end of the liquid level sensor (116) extends into the interior of the liquid tank (110), the liquid level sensor (116) is electrically connected to the alarm, and the alarm is configured to generate an alarm when the liquid level sensor (116) detects that the liquid level inside the liquid tank (110) is lower than a specified height.

5. The automatic liquid replenishing device according to claim 4, characterized in that: The alarm includes a buzzer and / or an indicator light.

6. The automatic liquid replenishing device according to claim 1, characterized in that: The liquid box (110) has a liquid infusion tube (113) arranged around the liquid infusion port, and the liquid box (110) also includes a sealing plug (114) for sealing the liquid infusion tube (113).

7. The automatic liquid replenishing device according to claim 1, characterized in that: The liquid tank (110) has a liquid infusion tube (113) arranged around the liquid infusion port, and the liquid tank (110) also includes an overflow tube (115) connected to the liquid infusion tube (113).

8. The automatic liquid replenishing device according to claim 1, characterized in that: The bottom of the liquid tank (110) is provided with a plurality of first mounting ears (117), each of the first mounting ears (117) is provided with at least one first fixing hole, and a first connecting member passes through the first fixing hole to mount the liquid tank (110) on an external bracket.

9. The automatic liquid replenishing device according to claim 1, characterized in that: The infusion pump (120) is provided with at least one second mounting ear (121), each of the second mounting ears (121) is provided with at least one second fixing hole, and a second connecting member passes through the second fixing hole to mount the infusion pump (120) on an external bracket.

10. An energy storage liquid cooling system, characterized in that: It comprises a cold source device (200), a liquid circuit device (300) and an automatic liquid replenishing device as described in any one of claims 1 to 9, wherein the liquid circuit device (300) is connected to the cold source device (200) and a heat exchanger (500) of an energy storage battery (400) to form a cooling circuit, and the automatic liquid replenishing device is used to replenish cooling liquid toward the liquid circuit device (300).

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