Battery cooling system and vehicle

Abstract

The battery cooling system comprises a cooling loop and a cleaning line, the cooling loop comprises a heat exchange assembly, a filtering assembly and a cooling channel of a battery body which are communicated in a circulating mode, the filtering assembly is located on the upstream of the cooling channel and comprises at least two sets of filtering lines connected in parallel, and the cleaning line is connected with the filtering assembly. Each filtering line comprises a particle filter and a valve assembly; the cleaning line comprises a liquid storage tank and a first conveying pump, and an outlet of the liquid storage tank is connected with an inlet of the first conveying pump; the valve assembly comprises an upstream valve arranged on the upstream of the particle filter and a three-way valve arranged on the downstream of the particle filter, and the three-way valve is provided with a first outlet communicated with the downstream of the particle filter, a second outlet communicated with the air conveying mechanism and a third outlet communicated with the outlet of the cooling channel. According to the cooling system, self-cleaning of the particle filter is achieved through back washing of the cleaning line, the particle filter is recycled, and the problem that the heat dissipation performance of the battery body is reduced is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle cooling systems, and in particular relates to a battery cooling system and a vehicle. Background Art

[0002] Hydrogen fuel has the advantages of no pollution, zero emission and high cleanliness. More and more automobile manufacturers choose to develop and apply hydrogen fuel to meet increasingly stringent regulatory requirements. The battery stack of the battery engine is equipped with a cooling channel. The coolant in the cooling channel can absorb the heat of the battery stack, thereby achieving heat dissipation of the battery stack. Since the size of the cooling channel in the battery stack generally ranges from 0.5mm to 0.8mm, if the impurity particles in the coolant are too large, the cooling channel will be blocked, affecting the heat dissipation of the battery stack and further affecting the battery performance. Therefore, a particle filter is often provided in the battery cooling system to filter the impurity particles in the coolant to ensure the cleanliness of the coolant entering the cooling channel of the battery stack.

[0003] In the current related technology, the particle filter is usually a straight-through cylindrical structure, and a filter is installed inside the shell of the particle filter. The particle filter filters the impurity particles in the coolant through the filter. After long-term use, the impurity particles in the coolant accumulate on the filter along the flow direction of the coolant, resulting in increased flow resistance at the filter, and even filter clogging, causing the water pump power in the cooling system to decrease, and the heat dissipation performance of the battery stack also decreases accordingly. At the same time, once the particle filter is blocked, it needs to be disassembled, cleaned or replaced, and the maintenance frequency and use cost are high. Utility Model Content

[0004] The utility model aims to provide a battery cooling system and a vehicle, aiming to solve the technical problems that the particle filter in the existing battery cooling system is easy to be blocked and has high maintenance frequency and use cost.

[0005] The utility model is implemented in this way. In a first aspect, a battery cooling system is provided, comprising:

[0006] A cooling circuit, comprising a heat exchange component, a filter component and a cooling channel of the battery body in a cyclic connection, wherein the filter component is located upstream of the cooling channel and comprises at least two sets of parallel filter lines, each of which comprises a particle filter and a valve component;

[0007] A cleaning circuit, comprising a liquid storage tank and a first delivery pump, wherein the outlet of the liquid storage tank is connected to the inlet of the first delivery pump;

[0008] Wherein, the valve assembly includes an upstream valve arranged upstream of the particulate filter and a three-way valve arranged downstream of the particulate filter, the three-way valve has a first outlet connected to the downstream of the particulate filter, a second outlet connected to the first delivery pump and a third outlet connected to the outlet of the cooling channel, the valve assembly has a first state and a second state, when the valve assembly is in the first state, the upstream valve, the first outlet and the third outlet are all opened, and the second outlet is closed, when the valve assembly is in the second state, the upstream valve and the third outlet are closed, and the first outlet and the second outlet are opened.

[0009] In one embodiment of the first aspect, the inlet of the liquid storage tank is connected to the outlet of the oxygen channel of the battery body, and the battery cooling system further includes a muffler connected to the outlet of the oxygen channel, the muffler is used to muffle the gas discharged from the outlet of the oxygen channel, the muffler is arranged between the oxygen channel and the liquid storage tank, and the muffler or the liquid storage tank is provided with an exhaust hole.

[0010] In one of the embodiments of the first aspect, the filter circuit further includes a detection structure for detecting a degree of clogging of the particle filter.

[0011] In one of the embodiments of the first aspect, the detection structure further includes a differential pressure sensor for detecting a pressure difference between an upstream side and a downstream side of the particle filter.

[0012] In one embodiment of the first aspect, the battery cooling system further includes a controller, and the controller is used to control each of the valve components to switch between the first state and the second state.

[0013] In one embodiment of the first aspect, the controller is communicatively connected to the detection structure, the controller is capable of receiving a detection result of the detection structure, and controlling the valve assembly to switch between the first state and the second state according to the detection result.

[0014] In one embodiment of the first aspect, the upstream valve includes a second three-way valve, the second three-way valve has a fourth outlet, a fifth outlet and a sixth outlet, the fourth outlet is connected to the heat exchange component, the fifth outlet is connected to the particulate filter, and the sixth outlet is connected to the outside.

[0015] In one of the embodiments of the first aspect, the heat exchange component includes a heat exchanger and a second delivery pump, the second delivery pump can drive the coolant in the cooling circuit to flow from the filter component to the cooling channel, and the heat exchanger can cool the coolant.

[0016] In one embodiment of the first aspect, the housing of the first delivery pump and the housing of the second delivery pump are connected.

[0017] In a second aspect, a vehicle is provided, comprising the battery cooling system as described in the above embodiments.

[0018] The technical effect of the utility model relative to the prior art is that when the cooling circuit is in normal use, each filter line is in the cooling circuit, and each filter line interruption valve assembly is in the first state, at which time the cleaning circuit is not connected to the cooling circuit, and the flow direction of the coolant in each filter line is from the heat exchange assembly to the cooling channel of the battery body, so as to filter part of the coolant respectively, and transport the coolant to the cooling channel to cool the battery body.

[0019] When the filter screen in the particle filter in a certain filter line is overloaded, the valve assembly on the filter line where the blocked particle filter is located can be switched to the second state, and the valve assemblies of other filter lines still maintain the first state to ensure the normal operation of the cooling circuit. At this time, in the filter line where the valve assembly is switched to the second state, the first delivery pump can sequentially deliver the liquid in the liquid storage tank to the downstream of the particle filter in the filter line through the second outlet and the first outlet of the first three-way valve, and the above liquid can flow to the particle filter in the filter line from downstream to upstream. When passing through the particle filter, the above liquid can flush down the impurity particles gathered in the upstream direction of the filter screen in the particle filter and take them away from the particle filter, and be discharged from the upstream of the particle filter.

[0020] In this way, the particle filter removes foreign particles on the filter screen by reversely delivering liquid to the particle filter through the first delivery pump, thereby realizing self-cleaning of the particle filter, allowing the particle filter to be recycled and reducing the water resistance of the particle filter, thereby avoiding the problem of reduced heat dissipation performance of the battery body due to overload of the filter screen on the particle filter and reducing the frequency and cost of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a structural diagram of a battery cooling system provided by an embodiment of the utility model;

[0023] Figure 2 It is a structural diagram of a battery cooling system provided by another embodiment of the utility model.

[0024] Description of reference numerals:

[0025] 10. Cooling circuit; 11. Heat exchange component; 111. Heat exchanger; 112. Second delivery pump; 12. Filter component; 121. Filter line; 1211. Particle filter; 1212. Valve assembly; 12121. Upstream valve; 12122. First three-way valve; 123. Detection structure; 13. Battery body; 101. First outlet; 102. Second outlet; 103. Third outlet; 104. Fourth outlet; 105. Fifth outlet; 106. Sixth outlet; 20. Cleaning line; 21. Liquid storage tank; 22. First delivery pump; 23. Stop valve; 24. Muffler; 30. Controller; 40. Two-inlet and two-outlet water pump; 401. First inlet; 402. Second inlet; 403. First outlet; 404. Second outlet. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] An embodiment of the utility model provides a battery cooling system and a vehicle, the vehicle comprising a vehicle body and the battery cooling system installed in the vehicle body, that is, the vehicle uses the battery body as a power source, and the battery cooling system can cool the battery body and perform self-cleaning to ensure the working performance of the battery body 13.

[0031] The type of the battery body is not limited. In some embodiments, the battery body can be a hydrogen fuel cell. Taking a hydrogen fuel cell as an example, the battery body has an oxygen channel, a hydrogen channel, and a cooling channel that are not connected to each other.

[0032] Hydrogen is introduced into the hydrogen channel, and the hydrogen molecule (H2) is decomposed into two hydrogen ions (2H + ) and two electrons (2e - ). The hydrogen ions are then transferred to the cathode of the battery through the electrolyte (usually a proton exchange membrane), and the released electrons flow to the cathode (positive electrode) through an external circuit. This process is equivalent to the electrons doing work in the external circuit, which can drive the vehicle's motor, lighting equipment, or any other load that requires electrical energy.

[0033] Oxygen or air is introduced into the oxygen channel, and the oxygen molecules (O2) combine with electrons coming through the external circuit and hydrogen ions transferred from the electrolyte under the action of the cathode catalyst to generate water molecules (H2O). The inlet of the oxygen channel may be connected to an air delivery structure, which can deliver external air to the oxygen channel of the battery body so that the battery body can react and supply power normally. An air filter may be provided upstream of the air delivery structure, which can remove dust, particulate matter and other impurities in the air sucked into the air delivery structure, prevent these impurities from entering the interior of the air delivery structure, reduce wear on the air delivery structure, and extend the life of the air delivery structure. Among them, the air delivery device can be an air compressor (Air Compressor) to improve the air delivery efficiency.

[0034] The cooling channel is filled with a coolant, which can cool down the battery stack of the battery body. The coolant may include deionized water, antifreeze, additives, etc., and the additives may include anticorrosive agents, buffers, defoamers, etc.

[0035] See also Figure 1 The battery cooling system includes a cooling circuit 10 and a cleaning circuit 20. The cleaning circuit 20 is connected to the cooling circuit 10, and the cooling circuit 10 passes through the cooling channel of the battery body 13.

[0036] The cooling circuit 10 includes a heat exchange component 11, a filter component 12 and a cooling channel in the battery that are circulated and connected. The filter component 12 is located upstream of the cooling channel. It can be understood that the flow direction of the coolant in the cooling circuit 10 is from the heat exchange component 11 to the filter component 12, from the filter component 12 to the cooling channel, and then from the cooling channel back to the heat exchange component 11. Among them, the upstream and downstream in the cooling circuit 10 refer to the upstream and downstream of the flow direction of the coolant in the cooling circuit 10. The heat exchange component 11 is used to cool the coolant that absorbs the heat of the battery body 13 so that the coolant can circulate and absorb the heat of the battery body 13. The heat exchange component 11 can also provide the flow power of the coolant in the cooling circuit 10. The filter component 12 includes at least two sets of parallel filter lines 121, each of which includes a particle filter 1211 and a valve component 1212. The particle filter 1211 is mainly used to capture and remove solid particle impurities that may exist in the coolant in the cooling circuit 10, such as dust, particles generated by wear, or deposits of other components in the system, so as to prevent the impurity particles from clogging the cooling channel of the battery body 13, resulting in a decrease in the heat transfer efficiency of the cooling circuit 10. In the process of the coolant flowing from the upstream of the particle filter 1211 to the downstream of the particle filter 1211 in the filter line 121, the particle impurities in the coolant are intercepted in the upstream direction of the filter screen in the particle filter 1211.

[0037] The cleaning circuit 20 includes a liquid storage tank 21 and a first delivery pump 22. A certain amount of liquid is stored in the liquid storage tank 21. The outlet of the liquid storage tank 21 is located below the liquid surface. The outlet of the liquid storage tank 21 is connected to the inlet of the first delivery pump 22. The first delivery pump 22 is used to output the liquid in the liquid storage tank 21. The liquid in the liquid storage tank 21 can be deionized water, and a detergent can also be added.

[0038] The valve assembly 1212 includes an upstream valve 12121 disposed upstream of the particle filter 1211 and a first three-way valve 12122 disposed downstream of the particle filter 1211. The first three-way valve 12122 has a first outlet 403, a second outlet 404 and a third outlet 103 that are connected to each other. The first outlet 403 is connected to the downstream of the particle filter 1211, the second outlet 404 is connected to the outlet of the first delivery pump 22, and the third outlet 103 is connected to the inlet of the cooling channel. The valve assembly 1212 has a first state and a second state. When the valve assembly 1212 is in the first state, the upstream valve 12121, the first outlet 403 and the third outlet 103 are all open, and the second outlet 404 is closed. When the valve assembly 1212 is in the second state, the upstream valve 12121 and the third outlet 103 are closed, and the first outlet 403 and the second outlet 404 are opened.

[0039] When the cooling circuit 10 is in normal use, each filter line 121 is in the cooling circuit 10, and each filter line 121 interruption valve assembly 1212 is in the first state. At this time, the cleaning circuit 20 is not connected to the cooling circuit 10, and the flow direction of the coolant in each filter line 121 is from the heat exchange assembly 11 to the cooling channel of the battery body 13, so as to filter part of the coolant respectively, and transport the coolant to the cooling channel to cool the battery body 13.

[0040] When the filter screen in the particle filter 1211 in a certain filter line 121 is overloaded, the valve assembly 1212 on the filter line 121 where the blocked particle filter 1211 is located can be switched to the second state, and the valve assemblies 1212 of other filter lines 121 still maintain the first state to ensure the normal operation of the cooling circuit 10. At this time, in the filter line 121 where the valve assembly 1212 is switched to the second state, the first delivery pump 22 can sequentially deliver the liquid in the liquid storage tank 21 to the downstream of the particle filter 1211 in the filter line 121 through the second outlet 404 and the first outlet 403 of the first three-way valve 12122, and the above liquid can flow to the particle filter 1211 in the filter line 121 from downstream to upstream. When passing through the particle filter 1211, the above liquid can flush the foreign particles gathered in the upstream direction of the filter screen in the particle filter 1211 and take it away from the particle filter 1211, and be discharged from the upstream of the particle filter 1211.

[0041] In this way, the particle filter 1211 removes foreign particles on its filter screen by reversely delivering liquid to the particle filter 1211 through the first delivery pump 22, thereby achieving self-cleaning of the particle filter 1211, and the particle filter 1211 can be recycled. At the same time, the water resistance of the particle filter 1211 is reduced, avoiding the problem of reduced heat dissipation performance of the battery body 13 due to overload of the filter screen on the particle filter 1211, thereby reducing the frequency and cost of maintenance.

[0042] It should be noted that when multiple particle filters 1211 simultaneously reach the level that needs to be cleaned, the multiple filter lines 121 that need to be cleaned can be cleaned one by one, that is, only the valve assembly 1212 of one of the above filter lines 121 is switched to the second state each time, and the valve assemblies 1212 in other filter lines 121 remain in the first state. Several or all of the multiple filter lines 121 that need to be cleaned can also be cleaned uniformly, that is, the valve assemblies 1212 of one or all of the above filter lines 121 are switched to the second state, but at least one of all the filter lines 121 needs to work normally, that is, the valve assembly 1212 of the filter line 121 that works normally is in the first state. In the following embodiments, the filter assembly 12 is described as including two filter lines 121. When one of the filter lines 121 needs to be cleaned, the other filter line 121 needs to work normally.

[0043] Optionally, a stop valve 23 may be provided between the liquid storage tank 21 and the first delivery pump 22. The stop valve 23 is closed when the cooling circuit 10 is operating normally to prevent leakage of the liquid storage tank 21. The stop valve 23 is opened when the cleaning line 20 needs to clean the particulate filter 1211, so that the first delivery pump 22 can transport the liquid in the liquid storage tank 21 to the filter line 121.

[0044] In some embodiments, see Figure 1 When the battery body 13 is a hydrogen fuel cell, the inlet of the liquid storage tank 21 is connected to the outlet of the oxygen channel of the battery body 13, so that the liquid storage tank 21 can collect the liquid water discharged from the oxygen channel for the cleaning process, thereby realizing the utilization of the water in the oxygen channel and saving energy consumption. It should be noted that the outlet of the oxygen channel can discharge the liquid water and gas generated after the oxygen is reduced, and the gas includes water vapor and unreacted air. The liquid storage tank 21 can only contain the liquid water discharged from the oxygen channel, and can also store liquid discharged from other channels. An exhaust hole can be opened on the liquid storage tank 21, so that the gas in the oxygen channel can be discharged from the liquid storage tank 21 through the exhaust hole to avoid excessive air pressure in the liquid storage tank 21.

[0045] Optional, see Figure 1 The battery cooling system further includes a muffler 24 connected to the outlet of the oxygen channel, and the muffler 24 is used to muffle the gas discharged from the outlet of the oxygen channel to achieve the silencing of the exhaust and drainage process of the cooling circuit 10. The muffler 24 is arranged between the oxygen channel and the liquid storage tank 21.

[0046] Optionally, the muffler 24 may be provided with an exhaust hole, and the gas in the oxygen channel is discharged through the exhaust hole on the muffler 24 , and the water in the oxygen channel flows into the liquid storage tank 21 to prevent the gas from entering the liquid storage tank 21 .

[0047] Of course, when the battery body 13 is not a hydrogen fuel cell and there is no oxygen channel inside the battery body 13 , the cleaning circuit 20 may also only have an independent liquid storage tank 21 and a first delivery pump 22 , and there is no communication between the liquid storage tank 21 and the battery body 13 .

[0048] In some embodiments, see Figure 1 The filter line 121 also includes a detection structure 123 for detecting whether the filter screen in the particle filter 1211 is overloaded. The operator can understand the blockage degree of the particle filter 1211 through the detection result of the detection structure 123. When the blockage degree of the particle filter 1211 is greater than a preset degree, it can be determined that the filter screen in the particle filter 1211 is overloaded. At this time, the valve component 1212 in the filter line 121 can be switched to the second state.

[0049] Optionally, the detection structure 123 includes a differential pressure sensor for detecting the pressure difference between the upstream and downstream of the particle filter 1211. When the filter screen in the particle filter 1211 is overloaded, the water pressure downstream of the particle filter 1211 is less than the water pressure upstream of the particle filter 1211. The more serious the blockage of the particle filter 1211 is, the smaller the water pressure downstream of the particle filter 1211 is, the greater the pressure difference between the upstream and downstream of the particle filter 1211 is, and the greater the pressure difference detected by the differential pressure sensor is. When the pressure difference detected by the differential pressure sensor reaches a preset threshold, it can be determined that the filter screen in the particle filter 1211 is overloaded, and the blockage degree of the particle filter 1211 has reached a degree that requires cleaning. At this time, the valve assembly 1212 on the filter line 121 where the particle filter 1211 detected by the differential pressure sensor is located can be switched to the second state to perform self-cleaning on the overloaded filter screen of the particle filter 1211.

[0050] In other embodiments, the detection structure 123 may also include a speed difference sensor, an optical sensor, or a temperature sensor, as long as it is possible to infer whether the filter in the particle filter 1211 is overloaded through the detection result.

[0051] It should be noted that the clogging condition of the particle filter 1211 can be detected by the detection structure 123, or can be detected by manual observation or the heat dissipation condition of the battery body 13, which is not limited here.

[0052] In some embodiments, see Figure 1 The battery cooling system further includes a controller 30, which is used to control each valve assembly 1212 to switch between the first state and the second state. In this way, the state of the valve assembly 1212 can be switched by an operator operating the controller 30, which is convenient, fast and highly reliable.

[0053] Optionally, the controller 30 is connected to the detection structure 123 for communication, so that the controller 30 can receive the detection result of the detection structure, and judge whether the impurities on the filter screen in the particle filter 1211 are overloaded according to the detection result of the detection structure 123, thereby controlling the valve assembly to switch between the first state and the second state. Specifically, the controller 30 can judge that the impurities on the filter screen in the particle filter 1211 are not overloaded when the detection result received from the detection structure 123 is less than a preset degree, and at this time, the controller 30 controls the valve assembly 1212 to maintain the first state; the controller 30 can judge that the impurities on the filter screen in the particle filter 1211 are overloaded when the detection result received from the detection structure 123 is greater than a preset degree, and at this time, the controller 30 drives the valve assembly 1212 on the detection line where the detection structure 123 is located to switch to the second state, thereby realizing the automation of the self-cleaning process of the cooling system.

[0054] In other embodiments, the controller 30 may have no communication connection with the detection structure 123. When the operator notices that the detection result of the detection structure 123 is greater than a preset threshold, the controller 30 is manually operated to drive the valve assembly 1212 to switch to the second state. There is no limitation here.

[0055] In some embodiments, see Figure 1 , the upstream valve 12121 includes a second three-way valve, the second three-way valve has a fourth outlet 104, a fifth outlet 105 and a sixth outlet 106 that are interconnected, the fourth outlet 104 is connected to the heat exchange component 11, the fifth outlet 105 is connected to the particle filter 1211, and the sixth outlet 106 is connected to the outside. When the valve component 1212 is in the first state, the fourth outlet 104 and the fifth outlet 105 are opened and the sixth outlet 106 is closed, so that the normal operation of the filter line 121 can be guaranteed to avoid water leakage and air leakage. When the valve component 1212 is in the second state, the fourth outlet 104 is closed and the fifth outlet 105 and the sixth outlet 106 are opened. In this way, the impurity particles generated after the air delivery structure cleans the particle filter 1211, the gas passing through the particle filter 1211 and the original coolant in the filter line 121 can be discharged through the fifth outlet 105 and the sixth outlet 106 in sequence.

[0056] In other embodiments, a drain pipe or an exhaust pipe may also be set between the upstream valve 12121 and the particulate filter 1211, and the impurity particles generated after the particulate filter 1211 is cleaned by the air conveying structure, the gas passing through the particulate filter 1211, and the original coolant in the filter line 121 can be discharged through the drain pipe or the exhaust pipe, and the connection between the pipe in the filter line 121 and the inlet of the particulate filter 1211 can also be disconnected, and the inlet of the particulate filter 1211 can be used as the discharge outlet for the impurity particles generated after the particulate filter 1211 is cleaned by the air conveying structure, the gas passing through the particulate filter 1211, and the original coolant in the filter line 121, and there is no limitation here.

[0057] In some embodiments, see Figure 1 The heat exchange component 11 includes a heat exchanger 111 and a second delivery pump 112. The second delivery pump 112 can drive the coolant in the cooling circuit 10 to flow from the filter component 12 to the cooling channel. The heat exchanger 111 is used to exchange heat with the external cooling system to cool the coolant in the cooling circuit 10 to achieve the recycling of the coolant.

[0058] Optionally, the heat exchanger 111 is located downstream of the second delivery pump 112 to increase the flow rate of the coolant in the heat exchanger 111. Of course, in other embodiments, the heat exchanger 111 may also be located upstream of the second delivery pump 112, which is not limited here.

[0059] Optionally, the first delivery pump 22 and the second delivery pump 112 are vane pumps, such as centrifugal pumps, axial flow pumps, vortex pumps, or positive displacement pumps, such as reciprocating pumps, rotor pumps, gear pumps or screw pumps, etc. There is no limitation here, as long as the coolant can flow in the cooling circuit 10.

[0060] Optionally, the housings of the first delivery pump 22 and the second delivery pump 112 are connected to facilitate installation and removal, wherein the first delivery pump 22 and the second delivery pump 112 can be two sets of delivery lines of the same pump body, for example, see Figure 2 The pump body can be a two-inlet and two-outlet water pump 40, which has two inlets and two outlets. The two inlets can be named as a first inlet 401 and a second inlet 402, and the two outlets can be named as a first outlet 403 and a second outlet 404. The first inlet 401 is connected to the first outlet 403 and forms a first delivery line, and the second inlet 402 is connected to the second outlet 404 and forms a second delivery line, wherein the first delivery line is equivalent to the first delivery pump 22 (such as Figure 1 ), connected to the cleaning line 20, the second delivery line forms a second delivery pump 112 (such as Figure 1 ), connected to the cooling circuit 10.

[0061] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A battery cooling system, characterized in that: include: A cooling circuit, comprising a heat exchange component, a filter component and a cooling channel of the battery body in a cyclic connection, wherein the filter component is located upstream of the cooling channel and comprises at least two sets of parallel filter lines, each of which comprises a particle filter and a valve component; A cleaning circuit, comprising a liquid storage tank and a first delivery pump, wherein the outlet of the liquid storage tank is connected to the inlet of the first delivery pump; Wherein, the valve assembly includes an upstream valve arranged upstream of the particulate filter and a three-way valve arranged downstream of the particulate filter, the three-way valve has a first outlet connected to the downstream of the particulate filter, a second outlet connected to the first delivery pump and a third outlet connected to the outlet of the cooling channel, the valve assembly has a first state and a second state, when the valve assembly is in the first state, the upstream valve, the first outlet and the third outlet are all opened, and the second outlet is closed, when the valve assembly is in the second state, the upstream valve and the third outlet are closed, and the first outlet and the second outlet are opened.

2. The battery cooling system according to claim 1, characterized in that: The inlet of the liquid storage tank is connected to the outlet of the oxygen channel of the battery body. The battery cooling system also includes a muffler connected to the outlet of the oxygen channel. The muffler is used to muffle the gas discharged from the outlet of the oxygen channel. The muffler is arranged between the oxygen channel and the liquid storage tank. The muffler or the liquid storage tank is provided with an exhaust hole.

3. The battery cooling system according to claim 1, characterized in that: The filter circuit also includes a detection structure for detecting the degree of clogging of the particle filter.

4. The battery cooling system according to claim 3, characterized in that: The detection structure further includes a differential pressure sensor for detecting a pressure difference between an upstream side and a downstream side of the particulate filter.

5. The battery cooling system according to claim 3, characterized in that: The battery cooling system further includes a controller, and the controller is used to control each of the valve components to switch between the first state and the second state.

6. The battery cooling system according to claim 5, characterized in that: The controller is in communication connection with the detection structure, and the controller can receive the detection result of the detection structure, and control the valve component to switch between the first state and the second state according to the detection result.

7. The battery cooling system according to claim 1, characterized in that: The upstream valve comprises a second three-way valve, the second three-way valve has a fourth outlet, a fifth outlet and a sixth outlet, the fourth outlet is connected to the heat exchange component, the fifth outlet is connected to the particle filter, and the sixth outlet is connected to the outside.

8. The battery cooling system according to claim 1, characterized in that: The heat exchange component includes a heat exchanger and a second delivery pump. The second delivery pump can drive the coolant in the cooling circuit to flow from the filter component to the cooling channel. The heat exchanger can cool the coolant.

9. The battery cooling system according to claim 8, characterized in that: The housing of the first delivery pump and the housing of the second delivery pump are connected.

10. A vehicle, characterized in that: Comprising a battery cooling system as claimed in any one of claims 1 to 9.

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