A battery cooling pipeline assembly for a new energy vehicle

Abstract

The application relates to a battery cooling pipeline assembly for a new energy automobile, which comprises a chassis support and a circulating cooling pipe arranged in the chassis support, a plurality of groups of battery packs are arranged on the chassis support in an array, the circulating cooling pipe is arranged between adjacent battery packs, and the circulating cooling pipe is provided with a water inlet and a water outlet; a circulating pump body is connected to the water inlet, a heat exchanger is arranged at the water outlet, the circulating pump body is connected to the heat exchanger, a connecting pipe is arranged between the water inlet and the water outlet, a switching valve is arranged at the water outlet of the circulating pump body, a drain pipe is connected to the switching valve, and the switching valve can control the water outlet of the circulating pump body to be switched from the circulating cooling pipe to the drain pipe; the application has the technical effect that cooling treatment is performed through the cooling pipe, and fire is avoided when water flows out.

Description

Technical Field

[0001] This application relates to the technical field of battery cooling, and in particular to a battery cooling pipeline assembly for use in new energy vehicles. Background Technology

[0002] Currently, fuel cells use fuel (such as hydrogen) and an oxidant (such as oxygen from the air) to generate electricity. Fuel cells propel vehicles by using electrical energy to power one or more electric motors, turning the wheels. Compared to vehicles powered by internal combustion engines, fuel cell vehicles produce less pollution and less carbon dioxide (especially if hydrogen is used as fuel). Fuel cells offer advantages over batteries, including the ability to fully recharge their fuel tanks in a shorter time than batteries require.

[0003] For reference, the prior art can be found in the application document with publication number CN111653847A, which discloses a cooling pipe for a new energy vehicle battery pack and its manufacturing method. The cooling pipe includes a hollow cooling pipe body and end components sleeved at both ends of the cooling pipe body. The end components include a lower stamping plate, an upper stamping plate with an upper through hole, and an upper water pipe fixedly installed in the upper through hole. Parts of the edges of the upper stamping plate and the lower stamping plate are fixedly connected, and a water-containing space is formed between them that is connected to the interior of the cooling pipe and the upper water pipe.

[0004] Because batteries undergo electrolysis and chemical reactions during energy storage and discharge, releasing a large amount of heat, the cooling system is particularly important. It can remove this excess heat through coolant. When the pipes wear out, coolant will leak out from the damaged area.

[0005] Regarding the aforementioned technologies, the inventors believe that there is a defect where cooling water can easily leak out when the circulating cooling pipe is damaged. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a battery cooling pipeline assembly for new energy vehicles.

[0007] This application provides a battery cooling pipeline assembly for new energy vehicles, which adopts the following technical solution:

[0008] A battery cooling pipe assembly for new energy vehicles includes a chassis bracket and a circulating cooling pipe disposed within the chassis bracket. Multiple battery packs are arrayed on the chassis bracket, and the circulating cooling pipe is positioned between adjacent battery packs. The circulating cooling pipe has an inlet and an outlet. A circulating pump is connected to the inlet, and a heat exchanger is located at the outlet. The circulating pump is connected to the heat exchanger, and a connecting pipe is provided between the inlet and the outlet. A switching valve is located at the outlet of the circulating pump, and a drain pipe is connected to the switching valve. The opening and closing of the switching valve controls the flow of water from the circulating pump to the drain pipe. Differential pressure sensors are located at the inlet and outlet of the circulating pump, and the switching valve responds to the differential pressure sensors to control its own opening and closing.

[0009] By adopting the above technical solution, under normal circumstances, the circulating cooling pipe encloses the battery pack. At this time, coolant is injected into the inlet of the circulating cooling pipe and discharged from the outlet. Heat exchange is then carried out through the heat exchanger, keeping the entire circulating cooling pipe at a low temperature. When a pipe is damaged, the pressure difference between the inlet and outlet of the circulating pump is different, causing the differential pressure sensor to detect a large change in pressure difference. At this time, the differential pressure sensor controls the switching valve to start, so that the drain pipe and connecting pipe are connected at the same time. At this time, coolant flows into the drain pipe from both the inlet and outlet of the circulating cooling pipe, thereby preventing coolant from flowing out at the damaged location and effectively improving the safety performance of the cooling system.

[0010] Preferably, a composite layer is provided on the inner side of the circulating cooling pipe, and the composite layer is made of rubber material; a partition is provided between the composite layer and the surface of the circulating cooling pipe.

[0011] By adopting the above technical solution, a composite layer is set inside the circulating cooling pipe. When a certain point is damaged, the rubber material inside will deform and may also break. At this time, the baffle will shrink to block the corresponding circulating cooling pipe as much as possible, which can further reduce the possibility of coolant flowing out from the damaged point and improve the safety performance of the cooling system.

[0012] Preferably, the circulating cooling pipe includes multiple sections of circulating pipe, and a multi-port joint is provided between adjacent circulating pipes. A liftable baffle is provided in the middle of the multi-port joint, and the baffle can close the multi-port joint.

[0013] By adopting the above technical solution, and by setting multiple sets of multi-port connectors, while the baffle can be raised and lowered to control the closing of the multi-port connectors at the corresponding positions, the circulation pipe at the corresponding positions can be sealed off, so that the damaged position will not affect the cooling effect of other parts, which can effectively improve the overall practical value.

[0014] Preferably, the bottom of the baffle is provided with an air gap, and an air injection port is provided at the air gap. The baffle can float on the water flow inside the circulating cooling pipe under the action of the air gap.

[0015] By adopting the above technical solution, when the coolant is in circulation, the baffle is located on the upper side of the coolant under the action of the air gap. When the coolant at the corresponding position is not available, the baffle will fall under the action of free fall and seal the corresponding multi-port connector, so that even if there is a break in a certain place, it will not affect the overall technical effect.

[0016] Preferably, the baffle is a T-shaped structure, and the air gap is located at the bottom of the T-shaped structure, with the included angle between the two sides of the T-shaped structure being an obtuse angle.

[0017] By adopting the above technical solution, the T-shaped structure with an obtuse angle can conform to aerodynamics. When the coolant is discharged, it will generate some wind force, which can give the T-shaped structure a downward force, making the sealing of the multi-port joint at the corresponding position better and improving safety performance.

[0018] Preferably, a groove is provided on the inner side of the multi-port connector corresponding to the position of the baffle, the outer wall of the multi-port connector at the groove is made of a heat-conducting material, a heat-expanding sealing strip is provided on the inner side of the groove, the heat-expanding sealing strip is made of a heat-expanding material, and the baffle is attached to the side of the heat-expanding sealing strip.

[0019] By adopting the above technical solution, the outer wall of the groove is made of heat-conducting material. The heat-conducting material can transfer the high temperature of the multi-port joint to the inside, so that when the baffle falls freely down, the heat-expanding sealing strip can expand under the action of the external temperature, thereby fixing the baffle in the corresponding position and achieving the sealing treatment of the multi-port joint.

[0020] Preferably, corrugated pipes are provided on both sides of the circulation pipe, and a spring assembly is provided on the inner side of the corrugated pipe. Under normal circumstances, the spring assembly is in an extended state to flatten the circulation pipe.

[0021] By adopting the above technical solution, the spring assembly can improve the adaptability of the circulation tube, facilitate the layout of the relative positions of the battery pack and the circulation tube, and effectively improve the practical value of the installation.

[0022] Preferably, the multi-port connector is provided with a plurality of temperature sensors for detecting the internal temperature of the circulating cooling pipe, and the sensing end of the temperature sensor is located inside the circulating cooling pipe.

[0023] Preferably, the chassis support is provided with a clamping assembly, which includes two vertical clamping rods. The two opposite inner sides of the vertical clamping rods are provided with slots for adapting to multi-port connectors. The multi-port connectors are provided with clamping slots at positions corresponding to the sliding grooves. The vertical clamping rods are made of thermally conductive material and are compatible with the clamping slots.

[0024] By adopting the above technical solution, a clamping assembly is set up, and the clamping assembly is also made of thermally conductive material. The vertical clamping rod contained in the clamping assembly cooperates with the clamping groove to achieve stable clamping of the circulating cooling pipe. At the same time, the vertical clamping rod can transfer heat to the clamping groove, and then to the inner sliding groove. Generally, only when there is a problem in the external environment that may ignite the battery pack spontaneously may there be a relatively hot environment. Heat conduction through the vertical clamping rod is also a form of heat transfer. At this time, the coolant of the circulating cooling pipe should be prevented from flowing through the corresponding position to improve safety performance.

[0025] Preferably, the chassis bracket is detachably connected to the chassis.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Under normal circumstances, the circulating cooling pipe encloses the battery pack. At this time, coolant is injected into the inlet of the circulating cooling pipe and discharged from the outlet. Heat exchange is then carried out through the heat exchanger, keeping the entire circulating cooling pipe at a low temperature. When a pipe is damaged, the pressure difference between the inlet and outlet of the circulating pump becomes different, causing the differential pressure sensor to detect a large change in pressure difference. At this time, the differential pressure sensor controls the switching valve to start, so that the drain pipe and connecting pipe are connected at the same time. Coolant flows into the drain pipe from both the inlet and outlet of the circulating cooling pipe, thus preventing coolant from flowing out at the damaged location and effectively improving the safety performance of the cooling system.

[0028] 2. When the coolant is in circulation, the baffle is located on the upper side of the coolant due to the air gap. When the coolant is absent at the corresponding position, the baffle will fall under the action of free fall, sealing the corresponding multi-port connector, so that even if there is damage in a certain place, it will not affect the overall technical effect.

[0029] 3. A composite layer is installed inside the circulating cooling pipe. When a certain part is damaged, the rubber material inside will deform and may also break. At this time, the baffle will shrink to block the corresponding circulating cooling pipe as much as possible, which can further reduce the possibility of coolant flowing out from the damaged location and improve the safety performance of the cooling system.

[0030] 4. The outer wall of the groove is made of thermally conductive material. The thermally conductive material can transfer the high temperature of the multi-port joint to the inside. When the baffle falls freely down, the heat-expanding sealing strip can expand under the action of the external temperature, thereby fixing the baffle in the corresponding position and achieving the sealing treatment of the multi-port joint. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the embodiment.

[0032] Figure 2 This is a schematic diagram highlighting the multi-port connector connection structure in the embodiment.

[0033] Figure 3 This is a schematic diagram highlighting the baffle connection structure in the embodiment.

[0034] Figure 4 This is a schematic diagram highlighting the internal structure of the circulation tube in the embodiment.

[0035] Explanation of reference numerals in the attached drawings: 1. Chassis support; 11. Clamping assembly; 12. Vertical clamping rod; 2. Circulating cooling pipe; 21. Connecting pipe; 22. Switching valve; 23. Drain pipe; 24. Differential pressure sensor; 241. First pressure sensor; 242. Second pressure sensor; 243. Data subtractor; 25. Circulation pipe; 251. Bellows; 252. Spring assembly; 26. Multi-port connector; 261. Baffle; 262. Air gap; 263. Air injection port; 264. Slide groove; 265. Thermal expansion sealing strip; 27. Composite layer; 271. Partition; 272. Fixing ring; 273. Deformable fixing strip; 3. Battery pack; 4. Circulating pump body; 5. Heat exchanger. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0037] This application discloses a battery cooling pipe assembly for use in new energy vehicles. (Refer to...) Figure 1 The system includes a chassis bracket 1 and a circulating cooling pipe 2 installed within the chassis bracket 1. The chassis bracket 1 is fixedly connected to the vehicle chassis. Multiple battery packs 3 are arranged in an array on the chassis bracket 1, with gaps between adjacent battery packs 3. The circulating cooling pipe 2 is arranged in a grid pattern between adjacent battery packs 3. One end of the grid-shaped circulating cooling pipe 2 has an inlet, and the other end has an outlet. A heat exchanger 5 is connected to the outlet of the circulating cooling pipe 2, and a circulating pump body 4 is connected to the other end of the heat exchanger 5. The other end of the circulating pump body 4 is connected to the inlet of the circulating cooling pipe 2. In this way, during the circulation of coolant in the circulating cooling pipe 2, heat can be continuously absorbed through the heat exchanger 5, keeping the coolant in the circulating cooling pipe 2 at a low temperature.

[0038] Reference Figure 1 and Figure 2 A differential pressure sensor 24, which can be linked, is installed at the inlet and outlet of the circulating pump body 4. The differential pressure sensor 24 includes a first pressure sensor 241 located at the inlet and a second pressure sensor 242 located at the outlet. A data subtractor 243 is connected to the first pressure sensor 241 and the second pressure sensor 242. The data subtractor 243 can subtract the values ​​of the first pressure sensor 241 and the second pressure sensor 242. When the pressure difference between the first pressure sensor 241 and the second pressure sensor 242 is large, it proves that the circulating cooling pipe 2 may be faulty. If damage is found, a control signal is output. A connecting pipe 21 is installed between the inlet and outlet of the circulating cooling pipe 2. A switching valve 22 is installed at the connecting pipe 21. A drain pipe 23 is connected to the switching valve 22. The connecting pipe 21 and the drain pipe 23 are simultaneously opened or closed. The outlet of the circulating pump body 4 to the circulating cooling pipe 2 is also controlled by the switching valve 22. The switching valve 22 is a solenoid valve. When it receives the control signal output by the data subtractor 243, it controls the connecting pipe 21 and the drain pipe 23 to open, and the outlet of the circulating pump body 4 to the circulating cooling pipe 2 to close.

[0039] Reference Figure 2 and Figure 3 The circulating cooling pipe 2 includes multiple sections of circulating pipe 25, which are connected by multi-way connectors 26, typically four-way connectors. A liftable baffle 261 is provided between the multi-way connectors 26. The baffle 261 has a T-shaped structure, with an air gap 262 at its bottom and an air injection port 263 on the air gap 262. A groove 264 is provided on the inner side of the multi-way connector 26 corresponding to the position of the baffle 261, allowing the baffle 261 to slide within the groove 264. The outer wall of the multi-port connector 26 is made of thermally conductive material. A thermal expansion sealing strip 265 is provided on the inner side of the slide groove 264. The thermal expansion sealing strip 265 is made of thermal expansion material. The baffle 261 is attached to the side of the thermal expansion sealing strip 265. The upper part of the baffle 261 has a corrugated structure. Under normal circumstances, there is coolant inside the circulating cooling pipe 2, while there is air in the lower air gap 262 of the baffle 261, so that the baffle 261 can float on the upper side of the coolant under natural conditions. At this time, the multi-port connector 26 is in the conductive state.

[0040] When the coolant level decreases, the baffle 261 can move downwards under the influence of gravity, thereby sealing the multi-port connector 26. If there is a high external temperature, it may indicate that the battery pack 3 is burning. In this case, the heat-conducting material on the side of the slide groove 264 can transfer heat to the thermal expansion sealing strip 265. The thermal expansion sealing strip 265 expands due to heat and can position and seal the baffle 261 that has already fallen. The baffle 261 has a T-shaped structure, and the air gap 262 is located at the bottom of the T-shaped structure. The included angle on both sides of the T-shaped structure is an obtuse angle. According to the aerodynamic principle, a downward force can be applied to the baffle 261, making the seal more stable.

[0041] The multi-port connector 26 is equipped with several temperature sensors for detecting the internal temperature of the circulating cooling pipe 2, and the sensing end of the temperature sensor is located inside the circulating cooling pipe 2.

[0042] Reference Figure 4 The circulation pipe 25 has corrugated pipes 251 on both sides, and a spring assembly 252 is provided inside the corrugated pipe 251. Under normal circumstances, the spring assembly 252 is in an extended state to flatten the circulation pipe 25. The inner side of the circulation cooling pipe 2 has a composite layer 27, which is made of rubber material. A partition 271 is provided between the composite layer 27 and the surface of the circulation cooling pipe 2. The partition 271 is annular and is provided on both sides of the circulation pipe 25. The partition 271 includes a fixing ring 272 and a plurality of deformable fixing strips 273 fixedly connected to the fixing ring 272. When the composite layer 27 contracts inward, the deformable fixing strips 273 can bend towards the center to minimize the flow area and improve safety performance.

[0043] Looking back Figure 1 and Figure 2 The chassis support 1 is provided with a clamping assembly 11, which includes two vertical clamping rods 12. The two opposite inner sides of the vertical clamping rods 12 are provided with slots for adapting to the multi-port connector 26. The multi-port connector 26 is provided with a clamping groove at the position corresponding to the slide groove 264. The vertical clamping rods 12 are made of heat-conducting material and can be adapted to the clamping groove.

[0044] The working principle of a battery cooling pipe assembly for new energy vehicles described in this application is as follows:

[0045] Coolant is injected into the inlet of the circulating cooling pipe 2 and discharged from the outlet of the circulating cooling pipe 2. The coolant is then exchanged for heat through the heat exchanger 5, keeping the entire circulating cooling pipe 2 at a low temperature. When a pipe is damaged, the pressure difference between the inlet and outlet of the circulating pump body 4 is different, causing the differential pressure sensor 24 to detect a large pressure difference change. At this time, the differential pressure sensor 24 controls the switching valve 22 to start, so that the drain pipe 23 and the connecting pipe 21 are connected at the same time. At this time, the coolant flows into the drain pipe 23 from both the inlet and outlet of the circulating cooling pipe 2, thereby preventing coolant from flowing out at the damaged location. When the coolant is in circulation, the baffle 261 is located on the upper side of the coolant under the action of the air gap 262. When the coolant at the corresponding position is not available, the baffle 261 will fall under the action of free fall, sealing the corresponding multi-port connector 26.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A battery cooling pipe assembly for a new energy vehicle, characterized in that: The application relates to a circulating cooling pipe (2) arranged in a chassis support (1) and a circulating pump body (4) connected to the circulating cooling pipe (2), wherein the chassis support (1) is provided with a plurality of groups of battery packs (3) arranged in an array, the circulating cooling pipe (2) is arranged between adjacent battery packs (3), the circulating cooling pipe (2) is provided with a water inlet and a water outlet, the circulating pump body (4) is connected to the water inlet of the circulating cooling pipe (2), a differential pressure sensor (24) is arranged on the water inlet and the water outlet of the circulating pump body (4) and can be linked, the differential pressure sensor (24) comprises a first pressure sensor (241) arranged on the water inlet of the circulating pump body (4) and a second pressure sensor (242) arranged on the water outlet of the circulating pump body (4), a data subtracter (243) is connected to the first pressure sensor (241) and the second pressure sensor (242), the data subtracter (243) subtracts the values of the first pressure sensor (241) and the second pressure sensor (242), when the pressure difference between the first pressure sensor (241) and the second pressure sensor (242) is large, the data subtracter (243) outputs a control signal, the water outlet of the circulating cooling pipe (2) is provided with a heat exchanger (5), the circulating pump body (4) is connected to the heat exchanger (5), a connecting pipe (21) is arranged between the water inlet of the circulating pump body (4) and the water outlet of the circulating pump body (4), a switching valve (22) is arranged on the water outlet of the circulating pump body (4), a drain pipe (23) is connected to the switching valve (22), the switching valve (22) can control the water outlet of the circulating pump body (4) to be switched from the circulating cooling pipe (2) to the drain pipe (23), when the switching valve (22) receives the control signal output by the data subtracter (243), the connecting pipe (21) and the drain pipe (23) are controlled to be conducted, and the water outlet of the circulating pump body (4) output to the circulating cooling pipe (2) is closed.

2. The battery cooling pipe assembly for a new energy vehicle according to claim 1, characterized in that: The inner side of the circulating cooling pipe (2) is provided with a composite layer (27) made of rubber material, and a partition plate (271) is arranged between the composite layer (27) and the surface of the circulating cooling pipe (2).

3. The battery cooling pipe assembly for a new energy vehicle according to claim 1, wherein: The circulating cooling pipe (2) comprises a plurality of circulating pipes (25), a multi-way joint (26) is arranged between adjacent circulating pipes (25), a liftable baffle (261) is arranged in the middle of the multi-way joint (26), and the baffle (261) can close the multi-way joint (26).

4. The battery cooling pipe assembly for a new energy vehicle according to claim 3, characterized in that: The bottom of the baffle (261) is provided with an air separation layer (262), an air injection port (263) is arranged on the air separation layer (262), and the baffle (261) can float on the water flow in the circulating cooling pipe (2) under the action of the air separation layer (262).

5. The battery cooling pipe assembly for a new energy vehicle according to claim 4, characterized in that: The baffle (261) is in a T-shaped structure, the air separation layer (262) is arranged at the bottom of the T-shaped structure, and the included angle between the two sides of the T-shaped structure is obtuse.

6. The battery cooling pipe assembly for a new energy vehicle according to claim 3, characterized in that: The inner side of the multi-way joint (26) is provided with a sliding groove (264) corresponding to the position of the baffle (261), the outer side wall of the multi-way joint (26) at the sliding groove (264) is made of heat-conducting material, the inner side of the sliding groove (264) is provided with a heat-expanding sealing strip (265) made of heat-expanding material, and the baffle (261) is attached to the side of the heat-expanding sealing strip (265).

7. The battery cooling pipe assembly for a new energy vehicle according to claim 3, characterized in that: The circulating pipe (25) is provided with bellows (251) on both sides, and the bellows (251) are internally provided with spring assemblies (252) in an elongated state to flatten the circulating pipe (25).

8. The battery cooling pipe assembly for a new energy vehicle according to claim 3, characterized in that: The multi-way joint (26) is provided with a plurality of temperature sensors for detecting the internal temperature of the circulating cooling pipe (2), and the sensing end of the temperature sensor is located in the circulating cooling pipe (2).

9. The battery cooling pipe assembly for a new energy vehicle of claim 1, wherein: The chassis support (1) is provided with a clamping assembly (11), the clamping assembly (11) comprises two vertical clamping rods (12), the two opposite inner sides of the vertical clamping rod (12) are provided with notches adapted to the multi-way joint (26), the multi-way joint (26) is provided with a clamping groove corresponding to the position of the sliding groove (264), the vertical clamping rod (12) is made of heat-conducting material and can be adapted to the clamping groove.

10. The battery cooling line assembly for a new energy vehicle of claim 1, wherein: The chassis support (1) can be detachably connected to the chassis.

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