CN116834576A - Charging liquid cooling system - Google Patents

Abstract

The application discloses a charging liquid cooling system, which comprises a flow path, a first temperature sensor and a controller, wherein the flow path comprises a main path, a first branch and a second branch, the first branch is connected in parallel with the second branch, the first branch is connected in series with the main path, and the second branch is connected in series with the main path; the main path comprises a liquid pump and a first heat exchanger, the liquid pump is connected with the first heat exchanger in series, and the first heat exchanger is positioned at the side of the power module; the second branch comprises a second heat exchanger; the first temperature sensor is at least partially arranged outside the shell and is electrically connected with the controller; the charging liquid cooling system comprises a regulating valve which is electrically connected with the controller; the charging liquid cooling system is in a heat exchange working state, the first heat exchanger exchanges heat with the power module in the heat exchange working state, and the controller controls the regulating valve to regulate liquid flow entering the first branch and the second branch according to the ambient temperature monitored by the first temperature sensor, so that the power consumption of the liquid pump can be reduced.

Description

Charging liquid cooling system

Technical Field

The application relates to the technical field of charging piles, in particular to a charging liquid cooling system.

Background

Along with the rapid development of new energy automobiles, the super charging pile demand is also increasing. In order to ensure that the battery of the new energy automobile can be filled up quickly, the power of the super charging pile is also increased. The power of one charging module can reach more than 40 Kw. The associated heating values are also increasing, while too high a temperature can lead to reduced performance and reliability of the power module, even to its failure, with the risk of causing spontaneous combustion in very high temperature conditions. Thermal management systems are particularly important to ensure that the power module is always within safe temperatures.

The charging pile in the current market is provided with a liquid cooling system, and the liquid cooling system can ensure that the power module is always within the safe temperature. However, as the number of new energy vehicles is continuously increased, the charging pile is in a long-time running state, and all liquid always passes through the heat exchanger, so that the water pump in the charging pile can run under a larger load working condition for a long time, which is contrary to the current energy-saving and environment-friendly concept.

Accordingly, there is a need to provide a super-charged liquid cooling system that addresses the above-described problems.

Disclosure of Invention

The application aims to provide an energy-saving superfilling liquid cooling system.

The application discloses a charging liquid cooling system which is used for carrying out heat exchange on a power module in a charging pile shell, and comprises a flow path, a first temperature sensor and a controller, wherein the flow path comprises a main path, a first branch and a second branch, the first branch and the second branch are connected in parallel, the first branch is connected in series with the main path, and the second branch is connected in series with the main path; the main path comprises a liquid pump and a first heat exchanger, the liquid pump and the first heat exchanger are connected in series, and the first heat exchanger is used for heat exchange of the power module; the second branch comprises a second heat exchanger;

the first temperature sensor is at least partially arranged outside the shell, and is electrically connected with the controller;

the charging liquid cooling system comprises a regulating valve, and at least one of the first branch and the second branch is provided with the regulating valve; or the first branch, the second branch and the main branch are provided with two joints, at least one joint is provided with the regulating valve, and the regulating valve is electrically connected with the controller;

the charging liquid cooling system is in a heat exchange working state, the first heat exchanger exchanges heat with the power module in the heat exchange working state, and the controller controls the regulating valve to regulate the liquid flow entering the first branch and/or the second branch according to the ambient temperature monitored by the first temperature sensor.

According to the charging liquid cooling system, the first temperature sensor and the controller are arranged, the controller can monitor the ambient temperature outside the shell according to the first temperature sensor, and control the regulating valve to regulate the flow of liquid entering the first branch and the second branch comprising the second heat exchanger, so that the flow of liquid in the charging liquid cooling system, which passes through the second heat exchanger, is adjustable according to the ambient temperature, all the liquid passes through the heat exchanger is reduced, the lift load of the liquid pump is reduced, the power consumption of the liquid pump is reduced, and the purpose of energy conservation is achieved.

Drawings

Fig. 1 is a schematic perspective view of a charging pile housing according to the present application;

FIG. 2 is an assembled schematic perspective view of a number of first heat exchangers, main piping;

FIG. 3 is a schematic perspective view of an assembly of a first heat exchanger, a first branch, and a flow control valve of the present application;

FIG. 4 is a block diagram of a first embodiment of a heating module in a charge-liquid cooling system according to the present application;

FIG. 5 is a block diagram of a second embodiment of a heating module in a charge-liquid cooling system of the present application;

FIG. 6 is a block diagram of another embodiment of a regulator valve in a charge-liquid cooling system of the present application.

Detailed Description

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. If there are several specific embodiments, the features in these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, the same numbers in different drawings denote the same or similar elements, unless otherwise specified. What is described in the following exemplary embodiments does not represent all embodiments consistent with the application; rather, they are merely examples of apparatus, articles, and/or methods that are consistent with aspects of the application as set forth in the claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application. As used in the specification and claims of the present application, the singular forms "a," "an," or "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that words such as "first," "second," and the like, used in the description and in the claims of the present application, do not denote any order, quantity, or importance, but rather are names used to distinguish one feature from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the terms "front," "rear," "upper," "lower," and the like are used herein for convenience of description and are not limited to a particular location or to a spatial orientation. The word "comprising" or "comprises", and the like, is an open-ended expression, meaning that elements appearing before "comprising" or "including", encompass the elements appearing after "comprising" or "including", and equivalents thereof, and not exclude that elements appearing before "comprising" or "including", may also include other elements. In the present application, if a plurality of the above-mentioned components are present, the meaning of the above-mentioned components is two or more.

Referring to fig. 1 to 6, the application discloses a charging liquid cooling system for performing heat exchange cooling on a power module in a charging pile housing 1. The power module is one of the core components of the charging pile, and a large amount of heat can be emitted in the process of rapidly charging the power battery of the new energy automobile, so that the temperature of the power module is rapidly increased, the performance and reliability of the power module are reduced due to the excessively high temperature, even the power module is invalid, and the risk of spontaneous combustion is caused under the extremely high temperature condition. The charging liquid cooling system can ensure that the power module is always in a safe temperature range, ensure the safety and stability of the charging pile, and reduce the power consumption of the charging liquid cooling system, so that the charging liquid cooling system can achieve the aim of energy conservation.

Referring to fig. 1 and fig. 4 to 6, the power module is disposed in the housing 1. The charge liquid cooling system includes a flow path, a first temperature sensor 3, and a controller 4.

The first temperature sensor 3 is at least partially disposed outside the housing 1, the first temperature sensor 3 is configured to monitor an ambient temperature outside the housing 1, and the first temperature sensor 3 is electrically connected to the controller 4. In the embodiment of the application, the first temperature sensor 3 is disposed outside the housing 1, the controller 4 is disposed inside the housing 1, and the first temperature sensor 3 is electrically connected to the controller 4 through a signal line. In other embodiments, the first temperature sensor 3 is provided on the wall of the housing 1, and the detection portion of the first temperature sensor 3 monitors the natural temperature outside the housing 1, which is not limited herein. When the charging liquid cooling system starts to work, the first temperature sensor 3 can sense the change of the ambient temperature outside the shell 1, convert the sensed temperature into an available output signal and send the available output signal to the controller 4, and the controller 4 obtains the ambient temperature according to the signal so as to control the liquid flow in the flow path. In this embodiment, the first temperature sensor 3 may monitor the ambient temperature outside the housing 1 in real time to regulate the flow, or monitor the ambient temperature outside the housing 1 every t time to regulate the flow, where t may be 0.5h to 2.5h, such as 0.5h, 1h, 1.5h, 2h, 2.5h, etc.

Referring to fig. 4, the flow path includes a main path 21 and first and second branches 22 and 23. The first branch 22 and the second branch 23 are connected in parallel, the first branch 22 is connected in series with the main circuit 21, and the second branch 23 is connected in series with the main circuit 21. The charging liquid cooling system has a heat exchange working state, in which the first heat exchanger 212 is configured to exchange heat with the power module, the first temperature sensor 3 is configured to monitor an ambient temperature outside the housing 1, and the controller 4 controls and adjusts the flow of the liquid entering the first branch 22 and/or the second branch 23 according to the ambient temperature outside the housing 1 monitored by the first temperature sensor 3.

When the first temperature sensor 3 detects that the natural environment temperature outside the housing 1 is less than or equal to the set temperature T1, the controller 4 controls the first branch 4 to guide the liquid in the main path 21 to completely flow into the first branch 22. When the first temperature sensor 3 detects that the ambient temperature outside the shell 1 is greater than the set temperature T1 and less than or equal to the set temperature T3, the controller 4 directs x% of the liquid in the main path 21 to flow into the second branch path 23, and the rest of the liquid flows into the first branch path 22, wherein x is greater than or equal to 20 and less than or equal to 75. When the first temperature sensor 3 detects that the ambient temperature outside the housing 1 is greater than the set temperature T3, the controller 4 directs the liquid in the main path 21 to flow completely into the second branch path 23. In this embodiment, the values of T1 and T3 may be set according to the requirement, and preferably T1 is (25±5) °c; t3 is (45+ -5) deg.C.

More specifically, when the first temperature sensor 3 detects that the ambient temperature outside the housing 1 is greater than the set temperature T1 and less than or equal to the set temperature T2, the controller 4 controls the first branch 22 and the second branch 23, the controller 4 controls the x '% liquid in the main path 21 to flow into the second branch 23, wherein 20+.x' +.50, and the controller 4 directs the remaining part of the liquid in the main path 21 to flow into the first branch 22. In this embodiment, the value of T2 may be set as required, and T2 is preferably (35.+ -. 3). Degree.C.

The main circuit 21 includes a liquid pump 211 and a first heat exchanger 212. The liquid pump 211 is connected in series with a first heat exchanger 212, the first heat exchanger 212 being located beside the power module. In an embodiment of the present application, the inlet end of the first heat exchanger 212 communicates with the outlet end of the liquid pump 211. The outlet end of the first heat exchanger 212 communicates with the inlet end of the first branch 22 and the inlet end of the second branch 23. The outlet end of the first branch 22 and the outlet end of the second branch 23 are both in communication with the inlet end of the liquid pump 211. The liquid pump 211 provides power to the liquid flow so that the liquid can flow in a set direction within the flow path. In other embodiments, the liquid pump 211 may also be disposed at the outlet end of the first heat exchanger 212, which is not limited herein. Preferably, the liquid pump 211 is a water pump. The liquid is formed by mixing ethylene glycol and water according to a certain proportion, for example, the ethylene glycol and the water are mixed according to the following ratio of 1:1 (the working temperature of the antifreeze is between minus 30 ℃ and 50 ℃ in the proportion, the normal operation of the liquid charging and cooling system can be satisfied) can be realized, the concentration of the liquid can be regulated according to actual demands, the working temperature of the liquid can be changed along with the concentration change, and the water pump provides power for the antifreeze in the flow path, so that the antifreeze can flow in the flow path along the set direction and flow into the first heat exchanger 212 for heat exchange.

Referring to fig. 3, the power module includes at least two, and the first heat exchanger 212 includes at least two. Each first heat exchanger 212 is correspondingly arranged beside each power module, and each first heat exchanger 212 exchanges heat with each power module, so that each power module can be cooled down rapidly. Preferably, the first heat exchangers 212 are arranged in parallel, and are divided into two columns along the transverse direction (i.e. the horizontal direction) of the casing 1, when the first heat exchangers 212 are multiple, the first heat exchangers 212 in each column are distributed at equal intervals along the height direction (i.e. the longitudinal direction) of the casing 1, i.e. the branches of each first heat exchanger 212 are arranged in the same process, so that the resistance of each branch is the same, the flow distribution of each branch is uniform, and good heat dissipation of each power module is ensured. A third branch 24 is further arranged between the first heat exchanger 212 and the main path 21, and liquid in the main path 21 is uniformly distributed to each first heat exchanger 212 through each third branch 24, so that each power module can perform heat exchange uniformly at the same time.

Preferably, the main path 21 includes an exhaust valve 50, the exhaust valve 50 is connected in series with the first heat exchangers 212, in some embodiments, the exhaust valve 50 is disposed between two rows of the first heat exchangers 212, and during the heat exchange process between each first heat exchanger 212 and each power module, the liquid is easily expanded and gasified when encountering heat, and by disposing the exhaust valve 50, the gas pressure in the flow path can be controlled, so as to ensure the operation safety of the charging liquid cooling system.

Referring to fig. 3, the main circuit 21 further includes a plurality of flow regulating valves 215, and the flow regulating valves 215 are correspondingly disposed at the inlet end of each first heat exchanger 212 to respectively control the flow rate of the liquid entering each first heat exchanger 212. Specifically, when the opening of the flow rate adjusting valve 215 is larger, the flow rate of the liquid entering the first heat exchangers 212 is larger, and the heat exchange efficiency of each first heat exchanger 212 is higher; conversely, the smaller the opening of the flow rate regulating valve 215, the smaller the flow rate of the liquid into the first heat exchangers 212, and the smaller the heat exchange rate of each first heat exchanger 212. The flow regulating valve 215 is arranged to control the heat exchange rate of each first heat exchanger 212, so that the heat exchange rate of each power module is matched and regulated. In the embodiment of the present application, the first heat exchanger 212 is a liquid cooling plate, and the flow rate adjusting valve 215 is a ball valve. The ball valve may be controlled by the controller 4 or manually, without limitation.

Referring to fig. 4 to 6, the second branch 23 includes a second heat exchanger 231. In the embodiment of the present application, the second heat exchanger 231 is a micro-channel heat exchanger, which is a heat exchange component with high internal flow resistance, and the liquid is continuously passed through the micro-channel heat exchanger all the time, so that the liquid pump 211 is operated under a large load working condition for a long time, and thus a large energy source is consumed. Therefore, the controller 4 is required to monitor the ambient temperature outside the housing 1 according to the first temperature sensor 3, and control and regulate the flow of the liquid entering the first branch 22 and the second branch 23, so as to avoid the situation that the liquid always passes through the heat exchangers all the time at low temperature, so that when the ambient temperature is lower and the cooling capacity required by the system is not large, more antifreeze liquid passes through the bypass first branch 22 without passing through the second heat exchanger 231 of the second branch 23, thereby reducing the lift burden of the liquid pump 211 and achieving the purpose of energy saving.

Referring to fig. 4 to 6, the charging liquid cooling system further includes a fan 30, where the fan 30 is disposed in the housing 1 and located beside the second heat exchanger 231. The air outlet surface of the fan 30 is arranged towards the second heat exchanger 231, and the fan 30 is electrically connected with the controller 4. When the liquid flows into the second heat exchanger 231 and the second heat exchanger 231 is required to improve the heat exchange efficiency to meet the heat dissipation requirement of the power module, the controller 4 controls the fan 30 to operate so as to improve the heat exchange efficiency of the second heat exchanger 231, and when the liquid flows into the second heat exchanger 231 and the fan 30 is not required to operate to meet the heat dissipation requirement of the power module, the fan 30 is not started, so that energy is saved. Meanwhile, the fan 30 drives the ambient low-temperature air to blow to the second heat exchanger 231, and a natural cold source is adopted, so that the energy-saving effect is also achieved compared with a cold source obtained by adopting a refrigerating system.

Referring to fig. 4 to 6, the charge liquid cooling system further includes a regulating valve 5. At least one of the first branch 22 and the second branch 23 is provided with a regulating valve 5, or the first branch 22, the second branch 23 and the main road 21 are provided with two joints, at least one joint is provided with the regulating valve 5, and the regulating valve 5 is electrically connected with the controller 4. In the heat exchange operating state, the controller 4 controls the regulating valve 5 to regulate the flow of the liquid entering the first branch 22 and/or the second branch 23 according to the ambient temperature outside the shell 1 monitored by the first temperature sensor 3.

Referring to fig. 4, in the first embodiment, the regulating valve 5 is a three-way valve, and the three-way valve is electrically connected to the controller 4. In the application scenario of the present application, the regulating valve 5 comprises one inlet 51 and two outlets 52, 53 (i.e. the regulating valve 5 is a split-flow three-way valve). The inlet 51 communicates with the outlet end of the main circuit 21, one of the two outlets 52, 53 of the regulating valve 5 communicates with the inlet end of the first branch circuit 22, the other outlet 53 communicates with the inlet end of the second branch circuit 23, and both the outlet end of the first branch circuit 22 and the outlet end of the second branch circuit 23 communicate with the inlet end of the main circuit 21. Specifically, when the first temperature sensor 3 detects that the natural temperature outside the housing 1 is less than or equal to (25±5) °c (i.e., the natural temperature T is less than or equal to (25±5) °c), the controller 4 controls the regulating valve 5 to open the outlet 52 and close the outlet 53, so that the liquid in the main passage 21 completely flows into the first branch passage 22. Without passing through the second heat exchanger 231, the normal flow of the liquid in the flow path can be ensured to radiate the power module without increasing the working load of the liquid pump 211, and the working load of the liquid pump 211 is minimum. When (25.+ -. 5) ℃ less than natural temperature T is less than or equal to (35.+ -. 3) ℃, controller 4 controls regulating valve 5 to open outlet 52 and outlet 53 so that (20-50)% of the liquid in main passage 21 flows into second branch passage 23. At this time, a part of the liquid in the main path 21 flows into the first branch path 22, and another part flows into the second branch path 23 to exchange heat with the second heat exchanger 231, so that the heat dissipation of the power module can be ensured under the condition of reducing the working load of the liquid pump 211 compared with the condition that the liquid completely flows into the second branch path 23. When (35.+ -. 3) ℃ less than natural temperature T is less than or equal to (45.+ -. 5) ℃, controller 4 controls regulating valve 5 to open outlet 52 and outlet 53 so that (50-75)% of the liquid in main passage 21 flows into first branch passage 22 and the remaining portion flows into second branch passage 23. At this time, most of the liquid in the main path 21 flows into the second branch path 23, and a small part of the liquid flows into the first branch path 22, so that the heat dissipation of the power module can be ensured under the condition of reducing the workload of the liquid pump 211 compared with the condition that the liquid completely flows into the second branch path 23. When the first temperature sensor 3 detects that the natural temperature outside the shell 1 is greater than (45±5) °c, the controller 4 controls the regulating valve 5 to close the outlet 52 and open the outlet 53, so that the liquid in the main path 21 completely flows into the second branch path 23, and simultaneously, the controller 4 controls the fan 30 to blow the second heat exchanger 231 to accelerate the heat exchange of the second heat exchanger 231, and at the moment, the work load of the liquid pump 211 is the maximum. The controller 4 controls the switch of the two outlets 52 and 53 of the regulating valve 5 under different natural temperatures, thereby reducing the load of the pump 211 and enabling the charge liquid cooling system to be more energy-saving.

Referring to fig. 6, in another application scenario of the present application, the regulating valve 5 is a three-way valve, and the regulating valve 5 includes two inlets 51', 52' and one outlet 53' (i.e., the regulating valve 5 is a mixed flow type three-way valve). The outlet 53 'communicates with the inlet end of the main circuit 21, one of the two inlets 51', 52 'of the regulating valve 5 communicating with the outlet end of the first branch circuit 22, the other inlet 52' communicating with the outlet end of the second branch circuit 23, the inlet end of the first branch circuit 22 and the inlet end of the second branch circuit 23 both communicating with the outlet end of the main circuit 21. Specifically, when the first temperature sensor 3 detects that the natural temperature outside the housing 1 is less than or equal to (25±5) °c (i.e., the natural temperature T is less than or equal to (25±5) °c), the controller 4 controls the regulator valve 5 to open the inlet 51', close the inlet 52', so that the liquid flowing out from the outlet end of the first heat exchanger 212 flows back to the liquid pump 211 completely through the first branch 22, and the work load of the liquid pump 211 is minimized. When (25.+ -. 5) ℃ is less than natural temperature T is less than or equal to (35.+ -. 3) ℃, controller 4 controls regulating valve 5' to open inlet 51', inlet 52' so that (20-50)% of the liquid flowing out from the outlet end of first heat exchanger 212 flows into first branch 22 and the rest of the liquid flowing out from the outlet end of first heat exchanger 212 flows into second branch 23, and then flows back to liquid pump 211. When (35.+ -. 3) ℃ less than natural temperature T.ltoreq.45.+ -. 5℃, controller 4 controls regulating valve 5' to open inlet 51', inlet 52' so that (50-75)% of the liquid from the outlet end of first heat exchanger 212 flows into first branch 22 and the rest of the liquid from the outlet end of first heat exchanger 212 flows into second branch 23, and then flows back to liquid pump 211. When the first temperature sensor 3 detects that the natural temperature outside the housing 1 is greater than (45±5) °c, the controller 4 controls the regulating valve 5' to close the inlet 51', open the inlet 52', so that the liquid from the outlet end of the first heat exchanger 212 completely passes through the second bypass flow 23, and flows back to the liquid pump 211, at which time the work load of the liquid pump 211 is at a maximum. The controller 4 controls the switch of the two inlets 51', 52' of the regulating valve 5' at different natural temperatures, so as to reduce the flow resistance of the liquid in the flow path, thereby reducing the lift burden of the liquid pump 211 and enabling the flow path to be more energy-saving.

Referring to fig. 1 to 6, in a second embodiment (not shown), the regulator valve is a two-way valve. In a first application scenario, two-way valves are provided, one of which is disposed on the first branch 22, and the other of which is disposed on the second branch 23, and the two-way valves are respectively electrically connected to the controller 4. The controller 4 controls the on-off of the two-way valves according to the natural temperature outside the shell 1 detected by the first temperature sensor 3, so as to regulate the liquid flow of the liquid in the main path 21 into the first branch path 22 and the second branch path 23. In the second application scenario, the two-way valve is disposed on the first branch 22 or the second branch 23, and the two-way valve is electrically connected to the controller 4. The controller 4 controls the on-off of the two-way valve according to the natural temperature outside the shell 1 monitored by the first temperature sensor 3, so as to regulate the flow rate of the liquid in the main path 21 flowing into the first branch path 22 or the second branch path 23. The control strategy of the two-way valve is the same as that in the first embodiment, and will not be described again.

In other embodiments, the inlet end of the first branch 22, the inlet end of the second branch 23, and the outlet end of the main path 21 are provided with a split-flow three-way valve, and the outlet end of the first branch 22, the outlet end of the second branch 23, and the inlet end of the main path 21 are provided with a combined-flow three-way valve, and the control strategy is the same as that in the first embodiment, and will not be repeated.

Referring to fig. 4 to 6, the main circuit 21 further includes a second temperature sensor 6 and a third temperature sensor 7, and the second temperature sensor 6 and the third temperature sensor 7 are disposed in the housing 1. The second temperature sensor 6 is disposed near the inlet end of the first heat exchanger 212, the second temperature sensor 6 is disposed at the inlet temperature of the first heat exchanger 212, and the second temperature sensor 6 is electrically connected to the controller 4. The third temperature sensor 7 is disposed near the outlet end of the first heat exchanger 212, the third temperature sensor 7 is disposed at the outlet temperature of the first heat exchanger 212, and the third temperature sensor 7 is electrically connected to the controller 4. Specifically, when the controller 4 controls the liquid to flow into the second heat exchanger 231, the second temperature sensor 6 can detect whether the heat exchange of the second heat exchanger 231 is normal. When the temperature of the liquid inlet monitored by the second temperature sensor 6 approaches the temperature of the liquid outlet monitored by the third temperature sensor 7, the heat exchange rate of the flow path is low. The first processing mode is as follows: the controller 4 starts the fan 30 or the controller 4 controls the regulating valve 5 to regulate the flow passing through the second branch 23, and the heat of the flow path is reduced by improving the heat exchange efficiency of the second heat exchanger 231, so that the normal operation of the charging liquid cooling system is ensured. If the temperature of the liquid fed by the second temperature sensor 6 is still close to the temperature of the liquid discharged by the third temperature sensor 7 after the first processing mode is adopted, the operation of the second heat exchanger 231 may be abnormal, and the second processing mode is adopted specifically as follows: the controller 4 prompts the engineer to check whether the second heat exchanger 231 is in an abnormal state, and if an abnormality occurs, repair or replacement is timely performed to ensure the normal operation of the flow path. If the second temperature sensor 6 detects that the inlet liquid temperature is close to the ambient temperature, the charging liquid cooling system is indicated to be normal.

Referring to fig. 4 to 6, the charge liquid cooling system further includes an expansion tank 213 and a check valve 214, the check valve 214 is connected in series with the liquid pump 211, the expansion tank 213 is connected to the main circuit 21, and an access end of the expansion tank 213 is close to an inlet end of the liquid pump 211. In this embodiment, the inlet end of expansion tank 213 communicates with the inlet end of liquid pump 211. An inlet end of the check valve 214 communicates with an outlet end of the liquid pump 211, and an outlet end of the check valve 214 communicates with an inlet end of the first heat exchanger 212. Preferably, expansion tank 213 is an expansion tank. The expansion tank is adopted, so that the risk of bursting of a flow path is reduced after the volume expansion of liquid at low temperature is guaranteed, and the safety is improved. And a check valve 214 is provided between the liquid pump 211 and the first heat exchanger 212 to ensure that the liquid in the flow path does not flow back. The charging liquid cooling system further comprises a liquid discharging branch, an access end of the liquid discharging branch is arranged between the one-way valve 214 and the first heat exchanger 212, a liquid discharging valve 40 is arranged on the liquid discharging branch, when the liquid medium in the flow path is excessive, the excessive liquid medium can be discharged through the liquid discharging valve 40 when flowing through the liquid discharging valve 40, and the balance of the liquid pressure in the flow path is ensured.

Referring to fig. 4 to 6, the charge liquid cooling system further includes a liquid supplementing branch 8, the liquid supplementing branch 8 is connected with the main path 21, an inlet end of the liquid supplementing branch 8 is disposed outside the main path 21, and an outlet end of the liquid supplementing branch 8 is disposed before an inlet end of the liquid pump 211. The liquid supplementing branch 8 is provided with a stop valve 9, and the stop valve 9 controls the on-off of the liquid supplementing branch 8. In this embodiment, the outlet end of the fluid infusion branch 8 is disposed before the inlet end of the expansion tank 213. The liquid in the flow path can be conveniently and timely supplemented by arranging the liquid supplementing branch pipe 8, and part of the supplemented liquid can be stored in the expansion tank 213 when supplementing liquid before the outlet end of the liquid supplementing branch pipe 8 is arranged at the inlet end of the first expansion tank 213, so that the liquid in the flow path is kept stable.

Referring to fig. 4 to 6, the charge liquid cooling system further includes a filter 10, and the filter 10 is located between the outlet end of the liquid supplementing branch 8 and the inlet end of the expansion tank 213. Preferably, the filter 10 is a Y-type filter, and the Y-type filter is used to filter impurities in a liquid in a flow path, so as to effectively reduce abrasion of the impurities to the liquid pump 211, and prevent the impurities from blocking the passages in the first heat exchanger 212 and the second heat exchanger 231 when entering the fine passages in the first heat exchanger 212 and the second heat exchanger 231, thereby affecting the cooling effect of the charge liquid cooling system.

Referring to fig. 4 to 5, the charging liquid cooling system further includes a heating module 20, and at least one of the main path 21 and the first branch path 22 includes the heating module 20, where the heating module 20 is electrically connected to the controller 4. When the first temperature sensor 3 detects that the ambient temperature outside the housing 1 is less than the set temperature T0, the controller 4 controls the heating module 20 to start heating the liquid, wherein the set temperature T0 is the freezing temperature of the liquid. In a first embodiment, the main circuit 21 includes a heating module 20. Specifically, the heating module 20 is disposed between the check valve 214 and the second temperature sensor 6, and when the ambient temperature of the outside is less than T0, that is, the ambient temperature outside the housing 1 is less than T0, which is detected by the first temperature sensor 3, the controller 4 controls the heating module 20 to start heating the liquid, so that the liquid in the flow path is frozen in a low-temperature environment, and the normal operation of the charging liquid system is affected. In the second embodiment, the first branch 22 includes the heating module 20, and when the ambient temperature of the outside is less than T0, that is, the first temperature sensor 3 detects that the ambient temperature outside the housing 1 is less than T0, the controller 4 controls the regulating valve 5 such that the liquid in the flow path passes through the first branch 22. Therefore, the heating module 20 is disposed on the first branch 22, so that the liquid in the flow path can be heated, the freezing of the liquid in the flow path in a low-temperature environment is reduced, the normal operation of the charging liquid system is affected, and the lift of the liquid pump 211 is reduced, thereby achieving the purpose of saving energy. In the third embodiment, there are two heating modules, and the main path 21 and the first branch path 22 each include one heating module 20, and the two heating modules 20 are electrically connected to the controller 4 respectively. The two heating modules 20 are arranged, so that the temperature of liquid in a flow path can be further increased, the charging liquid cooling system can be started quickly and run safely, and meanwhile, when one heating module 20 fails, the other heating module 20 can ensure the normal operation of heat exchange work of the system. Of course, in other embodiments, the second branch 23 may also comprise the heating module 20.

In the above embodiment, the charging liquid cooling system is provided with the heating module 20, and besides, the liquid can be prevented from freezing, and when the ambient temperature is lower than the lowest temperature at which the power module works, the working temperature of the power module is ensured to be within the normal working temperature range thereof by the heating module 20.

Referring to fig. 4 to 6, the charging liquid cooling system further includes a plurality of stop valves 9, where the stop valves 9 are disposed on the flow path for controlling on/off of the flow path. Wherein a first shut-off valve 9 is arranged between the drain valve 40 and the first heat exchanger 212, wherein a second shut-off valve 9 is arranged between the first heat exchanger 212 and the first branch 22, wherein a third shut-off valve 9 is arranged between the first branch 22 and the second branch 23, wherein a fourth shut-off valve 9 is arranged between the second heat exchanger 231 and the inlet end of the fluid-filling branch 8. Each stop valve 9 is used for controlling the on-off of a flow path, so that the maintenance personnel can conveniently maintain and overhaul the charge liquid cooling system daily.

In summary, in the charge liquid cooling system of the present application, through the first temperature sensor 3 disposed outside the housing 1 and the controller 4 disposed on the housing 1, the controller 4 monitors the ambient temperature outside the housing 1 according to the first temperature sensor 3, controls the adjusting valve 5 to adjust the flow rate of the liquid entering the first branch 22 and the second branch 23, when the ambient temperature is low and the cooling capacity required by the system is not large, more antifreeze liquid passes through the bypass first branch 22 without passing through the second heat exchanger 231 of the second branch 23, so as to avoid the situation that the liquid always passes through the heat exchangers at low temperature, thereby reducing the lift burden of the liquid pump 211 and achieving the purpose of energy saving.

The above embodiments are only for illustrating the technical solutions described in the present application and should not be construed as limiting the present application, and the present application should be understood based on the description of the directivity of the present application such as "front", "rear", "left", "right", "upper", "lower", etc., and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present application can be modified or substituted by those skilled in the art without departing from the spirit and scope of the present application and all the modifications thereof should be covered in the scope of the claims of the present application.

Claims (10)

1. The utility model provides a charge liquid cooling system for to charging the power module in the stake casing and exchanging heat, its characterized in that: the charging liquid cooling system comprises a flow path, a first temperature sensor and a controller, wherein the flow path comprises a main path, a first branch and a second branch, the first branch and the second branch are connected in parallel, the first branch is connected in series with the main path, and the second branch is connected in series with the main path; the main path comprises a liquid pump and a first heat exchanger, the liquid pump and the first heat exchanger are connected in series, and the first heat exchanger is used for heat exchange of the power module; the second branch comprises a second heat exchanger;

the first temperature sensor is at least partially arranged outside the shell, and is electrically connected with the controller;

the charging liquid cooling system comprises a regulating valve, and at least one of the first branch and the second branch is provided with the regulating valve; or the first branch, the second branch and the main branch are provided with two joints, at least one joint is provided with the regulating valve, and the regulating valve is electrically connected with the controller;

the charging liquid cooling system is in a heat exchange working state, the first heat exchanger exchanges heat with the power module in the heat exchange working state, and the controller controls the regulating valve to regulate the liquid flow entering the first branch and/or the second branch according to the ambient temperature monitored by the first temperature sensor.

2. The charge liquid cooling system of claim 1, wherein:

when the charging liquid cooling system is in a heat exchange working state and the ambient temperature monitored by the first temperature sensor is smaller than or equal to a set temperature T1, the controller controls the first branch to guide the liquid in the main path to completely flow into the first branch;

when the ambient temperature monitored by the first temperature sensor is greater than the set temperature T1 and less than or equal to the set temperature T3, the controller controls the regulating valve to guide x% of liquid in the main path to flow into the second branch path, wherein x is more than or equal to 20 and less than or equal to 75;

when the ambient temperature monitored by the first temperature sensor is greater than the set temperature T3, the controller controls the regulating valve to guide the liquid in the main path to completely flow into the second branch path;

wherein, T1= (25+ -5) deg.C, T3= (45+ -5) deg.C.

3. The charge liquid cooling system of claim 2, wherein: when the charging liquid cooling system is in a heat exchange working state and the ambient temperature monitored by the first temperature sensor is greater than the set temperature T1 and less than or equal to the set temperature T2, the controller controls the regulating valve to guide x '% liquid in the main path to flow into the second branch path, wherein x' < 20 > to < 50 >;

when the ambient temperature monitored by the first temperature sensor is greater than the set temperature T2 and less than or equal to the set temperature T3, the regulating valve guides x '-liquid in the main path to flow into the second branch path, wherein x' -is more than 50 and less than or equal to 75;

wherein, T2= (35+ -3) deg.C.

4. The charge liquid cooling system of claim 2, wherein: the regulating valve is a three-way valve, the regulating valve comprises an inlet and two outlets, the inlet is communicated with the outlet end of the main path, one of the two outlets of the regulating valve is communicated with the inlet end of the first branch path, the other outlet is communicated with the inlet end of the second branch path, and the outlet end of the first branch path and the outlet end of the second branch path are both communicated with the inlet end of the main path;

or the regulating valve is a three-way valve, the regulating valve comprises two inlets and an outlet, the outlet is communicated with the inlet end of the main path, one inlet is communicated with the outlet end of the first branch path, the other inlet is communicated with the outlet end of the second branch path, and the inlet end of the first branch path and the inlet end of the second branch path are both communicated with the outlet end of the main path;

or, the regulating valve is a two-way valve, and at least one of the first branch and the second branch is provided with the regulating valve.

5. The charge liquid cooling system of claim 1, wherein: the charging liquid cooling system further comprises a second temperature sensor, the second temperature sensor is arranged near the inlet end of the first heat exchanger, the second temperature sensor is configured to monitor the liquid inlet temperature of the first heat exchanger, and the second temperature sensor is electrically connected with the controller;

the charging liquid cooling system further comprises a third temperature sensor, the third temperature sensor is arranged close to the outlet end of the first heat exchanger, the third temperature sensor is configured to monitor the liquid outlet temperature of the first heat exchanger, and the third temperature sensor is electrically connected with the controller.

6. The charge liquid cooling system of claim 1, wherein: the charging liquid cooling system further comprises an expansion tank and a one-way valve, the one-way valve is connected with the liquid pump in series, the expansion tank is connected with the main way, and the access end of the expansion tank is close to the inlet end of the liquid pump;

the charging liquid cooling system further comprises a liquid supplementing branch, the liquid supplementing branch is connected with the main road, the inlet end of the liquid supplementing branch is arranged on the main road, the outlet end of the liquid supplementing branch is arranged in front of the inlet end of the liquid pump, the liquid supplementing branch is provided with a stop valve, and the stop valve controls the on-off of the liquid supplementing branch.

7. The charge liquid cooling system of claim 6, wherein: the main way comprises a filter, and the filter is arranged between the outlet end of the fluid supplementing branch way and the access end of the expansion tank.

8. The charge liquid cooling system of claim 2, wherein: at least one of the main path and the first branch path comprises a heating module, and the heating module is electrically connected with the controller;

in the heat exchange working state, when the ambient temperature monitored by the first temperature sensor is smaller than or equal to the set temperature T0, the controller controls the heating module to start heating liquid, wherein the set temperature T0 is the freezing point temperature of the liquid.

9. The charge liquid cooling system of claim 1, wherein: the power module comprises at least two first heat exchangers, the first heat exchangers are correspondingly arranged at the side of the power module, and the first heat exchangers are arranged in parallel; the main path further comprises a plurality of flow regulating valves, the inlet end and/or the outlet end of the first heat exchanger are/is provided with the flow regulating valves, and the flow regulating valves control and regulate the liquid flow in the first heat exchanger.

10. The charge liquid cooling system of claim 1, wherein: the charging liquid cooling system further comprises a fan, the fan is located beside the second heat exchanger, the fan is configured for the second heat exchanger to dissipate heat, and the fan is electrically connected with the controller.