Battery cooling pipeline assembly for new energy automobile

Abstract

The invention relates to a battery cooling pipeline assembly used on a new energy automobile, the battery cooling pipeline assembly comprises a chassis support and a circulating cooling pipe arranged in the chassis support, a plurality of battery packs are arranged on the chassis support in an array mode, the circulating cooling pipe is arranged between the adjacent battery packs, and the circulating cooling pipe is provided with a water inlet and a water outlet; the water inlet is connected with a circulating pump body, the water outlet is provided with a heat exchanger, the circulating pump body is connected with the heat exchanger, a connecting pipe is arranged between the water inlet and the water outlet, the water outlet of the circulating pump body is provided with a change-over valve, and the change-over valve is connected with a drain pipe. Outlet water of the circulating pump body can be controlled to be transferred to the drainage pipe from the circulating cooling pipe by opening and closing the change-over valve; the cooling device has the technical effects that cooling treatment is conducted through the cooling pipe, and meanwhile fire breakout is avoided when water flows out.

Description

Technical Field

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

[0002] Currently, fuel cells utilize fuel (such as hydrogen) and an oxidant (such as oxygen in the air) to generate electricity. The fuel cell can power one or more electric motors with electrical energy to rotate the wheels and propel the vehicle. Compared with vehicles powered by internal combustion engines, fuel cell vehicles produce less pollution and carbon dioxide (especially if hydrogen is used as fuel). Fuel cells have advantages over storage batteries, including the ability to refill the fuel tank in a shorter time than it takes to charge a storage battery.

[0003] The prior art can refer to the application document with the publication number CN111653847A, which discloses a cooling pipe for a new energy vehicle battery pack and its production method. The cooling pipe includes a cooling pipe body with a hollow interior and end components sleeved at both ends of the cooling pipe body. The end components include a lower stamping piece, an upper stamping piece with an upper through hole, and an upper water pipe fixedly installed in the upper through hole. Part of the edge of the upper stamping piece and part of the edge of the lower stamping piece are fixedly connected, and a water-containing space communicating with both the interior of the cooling pipe and the upper water pipe is formed therebetween.

[0004] Since electrolysis and chemical reactions occur during the energy storage and discharge processes of the battery, a large amount of heat is released. Therefore, the cooling system is particularly important, and the excess heat can be carried away by the coolant. When the pipeline wears, the coolant will leak out from the damaged part.

[0005] Regarding the above related technologies, the inventor believes that there is a defect that it is easy for cooling water to flow out when the circulating cooling pipe is damaged. Summary of the Invention

[0006] In order to solve the above technical problems, this application provides a battery cooling pipeline assembly for new energy vehicles.

[0007] A battery cooling pipeline assembly for new energy vehicles provided by this application adopts the following technical solutions: A battery cooling pipeline assembly for a new energy vehicle, comprising a chassis bracket and a circulating cooling pipe arranged inside the chassis bracket. Multiple groups of battery packs are arranged in an array on the chassis bracket. The circulating cooling pipe is placed between adjacent battery packs. 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. The opening and closing of the switching valve can control the water output of the circulating pump body to be transferred from the circulating cooling pipe to the drain pipe. Pressure difference sensors are arranged at the water inlet and the water outlet of the circulating pump body. The switching valve responds to the pressure difference sensors to control its own opening and closing.

[0008] By adopting the above technical solution, under normal circumstances, the circulating cooling pipe wraps the battery pack. At this time, the coolant is injected into the water inlet of the circulating cooling pipe, and the coolant is output from the water outlet of the circulating cooling pipe, and then heat exchange is carried out through the heat exchanger, so that the entire circulating cooling pipe is always at a relatively low temperature. When a certain pipeline is damaged, the pressure differences at the water inlet and the water outlet of the circulating pump body are different, resulting in a large change in the pressure difference detected by the pressure difference sensor. At this time, the switching valve is controlled to start by the pressure difference sensor, so that the drain pipe and the connecting pipe are connected at the same time. At this time, the coolant flows into the drain pipe from the water inlet and the water outlet of the circulating cooling pipe at the same time, thereby preventing the coolant from flowing out at the damaged position and effectively improving the safety performance of the cooling system.

[0009] Preferably, a composite layer is arranged inside the circulating cooling pipe, and the composite layer is made of rubber material; a partition board is arranged between the composite layer and the surface of the circulating cooling pipe.

[0010] By adopting the above technical solution, a composite layer is arranged in the circulating cooling pipe. When a certain position is damaged, the rubber material inside it will deform, and it may also be damaged. At this time, the partition board will shrink to block the corresponding circulating cooling pipe as much as possible, which can further reduce the possibility of the coolant flowing out from the damaged position and improve the safety performance of the cooling system.

[0011] Preferably, the circulating cooling pipe comprises multiple sections of circulating pipes, and multiple-way joints are arranged between adjacent circulating pipes. A liftable baffle is arranged in the middle of the multiple-way joint, and the baffle can close the multiple-way joint.

[0012] By adopting the above technical solution, by arranging multiple groups of multiple-way joints, and the baffle can be lifted to control the closing of the multiple-way joint at the corresponding position, and then the circulating pipe at the corresponding position can be blocked, so that the damaged position will not affect the cooling effect of other parts, and the overall practical value can be effectively improved.

[0013] Preferably, an air interlayer is provided at the bottom of the baffle, and an air injection port is provided at the air interlayer. The baffle can float on the water flow inside the circulating cooling pipe under the action of the air interlayer.

[0014] By adopting the above technical solution, when the coolant is in a circulating state, at this time, the baffle is located above the coolant under the action of the air interlayer. When there is no coolant at the corresponding position, the baffle will drop under the action of free fall and seal the corresponding multi-way joint, so that even if there is a breakage somewhere, the overall technical effect will not be affected.

[0015] Preferably, the baffle is of a T-shaped structure, and the air interlayer is located at the bottom of the T-shaped structure. The included angles on both sides of the T-shaped structure are obtuse angles.

[0016] By adopting the above technical solution, the T-shaped structure with an obtuse angle structure can conform to aerodynamics. When the coolant is discharged, some wind force will be generated, and the wind force can give a downward force to the T-shaped structure, making the sealing condition of the multi-way joint at the corresponding position better and improving the safety performance.

[0017] Preferably, a chute is provided on the inner side surface of the multi-way joint at the position corresponding to the baffle. The outer side wall of the multi-way joint at the chute is made of a heat-conducting material. A heat-expandable sealing strip is provided on the inner side surface of the chute. The heat-expandable sealing strip is made of a heat-expandable material. The baffle fits against the side of the heat-expandable sealing strip.

[0018] By adopting the above technical solution, the outer side wall corresponding to the chute is made of a heat-conducting material, and the heat-conducting material can transfer the external high temperature of the multi-way joint to the inside, so that when the baffle slides down freely, the heat-expandable sealing strip can expand under the action of the external temperature, and then fix the baffle at the corresponding position to realize the sealing treatment of the multi-way joint.

[0019] Preferably, bellows are provided on both sides of the circulation pipe, and a spring assembly is provided inside the bellows. Under normal circumstances, the spring assembly is in an extended state to flatten the circulation pipe.

[0020] By adopting the above technical solution, setting the spring assembly can improve the adaptability of the circulation pipe, facilitate the layout of the relative positions of the battery pack and the circulation pipe, and can effectively improve the practical value of the installation.

[0021] Preferably, a plurality of temperature sensors for detecting the internal temperature of the circulating cooling pipe are provided on the multi-way joint, and the sensing ends of the temperature sensors are located inside the circulating cooling pipe.

[0022] Preferably, a clamping assembly is provided on the chassis bracket. The clamping assembly includes two vertical clamping rods. Grooves adapted to the multi-way joint are formed on two opposite inner sides of the vertical clamping rods. Clamping grooves are formed at positions of the multi-way joint corresponding to the sliding grooves. The vertical clamping rods are made of a heat-conducting material and can be adapted to the clamping grooves.

[0023] By adopting the above technical solution, the clamping assembly is provided and the clamping assembly is also made of a heat-conducting material. The vertical clamping rods contained in the clamping assembly cooperate with the clamping grooves to stably clamp the circulating cooling pipe. At the same time, the vertical clamping rods can transfer heat into the clamping grooves and then to the inner sliding grooves. Generally, only when there are problems in the external environment that may ignite the spontaneous combustion of the battery pack, there may be a relatively hot environmental state. Heat conduction through the vertical clamping rods is also a form of heat transfer. At this time, the coolant flowing through the corresponding position of the circulating cooling pipe should be avoided to improve safety performance.

[0024] Preferably, the chassis bracket is detachably connected to the chassis.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Under normal circumstances, the circulating cooling pipe wraps the battery pack. At this time, coolant is injected into the water inlet of the circulating cooling pipe, and the coolant is output from the water outlet of the circulating cooling pipe. Then, heat exchange is carried out through the heat exchanger, so that the entire circulating cooling pipe is always at a relatively low temperature. When a certain pipeline is damaged, the pressure difference between the water inlet and the water outlet of the circulating pump body is different, resulting in a large change in the pressure difference detected by the pressure difference sensor. At this time, the switching valve is controlled to start by the pressure difference sensor, so that the drain pipe and the connecting pipe are connected at the same time. At this time, the coolant flows into the drain pipe from the water inlet and the water outlet of the circulating cooling pipe at the same time, thereby preventing the coolant from flowing out at the damaged position and effectively improving the safety performance of the cooling system.

[0026] 2. When the coolant is in a circulating state, at this time, the baffle is located above the coolant under the action of the air layer. When there is no coolant at the corresponding position, the baffle will drop under the action of free fall to seal the corresponding multi-way joint, so that even if there is a breakage at a certain place, it will not affect the overall technical effect.

[0027] 3. A composite layer is provided in the circulating cooling pipe. When a certain place is damaged, the rubber material inside it will deform and may also be damaged. At this time, the partition 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 position and improve the safety performance of the cooling system.

[0028] 4. The outer wall corresponding to the chute is made of a heat-conducting material, which can transfer the external high temperature of the multi-way joint to the inside. After the baffle falls freely, the heat-expandable sealing strip can expand under the action of the external temperature, and then fix the baffle at the corresponding position to achieve the sealing treatment of the multi-way joint. Brief Description of the Drawings

[0029] Figure 1 is a schematic diagram of the overall structure of the embodiment.

[0030] Figure 2 is a schematic diagram highlighting the connection structure of the multi-way joint in the embodiment.

[0031] Figure 3 is a schematic diagram highlighting the connection structure of the baffle in the embodiment.

[0032] Figure 4 is a schematic diagram highlighting the internal structure of the circulation pipe in the embodiment.

[0033] Description of the Reference Numerals: 1, chassis bracket; 11, clamping assembly; 12, vertical clamping rod; 2, circulating cooling pipe; 21, connecting pipe; 22, conversion valve; 23, drain pipe; 24, pressure difference sensor; 241, first pressure sensor; 242, second pressure sensor; 243, data subtractor; 25, circulation pipe; 251, bellows; 252, spring assembly; 26, multi-way joint; 261, baffle; 262, air layer; 263, air injection port; 264, chute; 265, heat-expandable sealing strip; 27, composite layer; 271, partition; 272, fixing ring; 273, deformable fixing strip; 3, battery pack; 4, circulation pump body; 5, heat exchanger. Detailed Description of the Embodiment

[0034] The following will further elaborate on the present application Figures 1-4 with reference to the attached drawings.

[0035] The embodiment of the present application discloses a battery cooling pipeline assembly for a new energy vehicle. Referring to Figure 1 , it includes a chassis bracket 1 and a circulating cooling pipe 2 arranged inside the chassis bracket 1; the chassis bracket 1 is fixedly connected to the vehicle chassis, and multiple groups of battery packs 3 are arranged in an array on the chassis bracket 1, with gaps left between adjacent battery packs 3. The circulating cooling pipe 2 is in a grid shape and is arranged between adjacent battery packs 3. An inlet is provided at one end of the grid-shaped circulating cooling pipe 2, and an outlet is provided at the other end. 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 the coolant in the circulating cooling pipe 2, heat can be continuously absorbed through the heat exchanger 5 to keep the coolant in the circulating cooling pipe 2 at a low temperature state all the time.

[0036] Referring to Figure 1 and Figure 2 ,a pressure difference sensor 24 that can be linked is provided at the water inlet and outlet of the circulating pump body 4. The pressure difference sensor 24 includes a first pressure sensor 241 located at the water inlet and a second pressure sensor 242 located at the water outlet. A data subtractor 243 is connected to the first pressure sensor 241 and the second pressure sensor 242. The data subtractor 243 can perform subtraction processing on 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 damaged, and at this time, a control signal is output; a connecting pipe 21 is provided between the water inlet and outlet of the circulating cooling pipe 2, a switching valve 22 is provided 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 turned on or off, and the water outlet output by the circulating pump body 4 to the circulating cooling pipe 2 is also controlled to be turned on and off in response to the switching valve 22; the switching valve 22 is a solenoid valve. When receiving the control signal output by the data subtractor 243, it controls the connecting pipe 21 and the drain pipe 23 to be turned on, and the water outlet output by the circulating pump body 4 to the circulating cooling pipe 2 is turned off.

[0037] Referring to Figure 2 and Figure 3 ,the circulating cooling pipe 2 includes multiple sections of circulating pipes 25, and adjacent circulating pipes 25 are connected by a multi-way joint 26. The multi-way joint is generally a four-way joint; a lifting baffle 261 is provided between the multi-way joints 26. The baffle 261 is of a T-shaped structure, and the bottom of the baffle 261 is an air layer 262. An air injection port 263 is opened on the air layer 262; a sliding groove 264 is opened on the inner side surface of the multi-way joint 26 corresponding to the position of the baffle 261. The baffle 261 is slidably connected to the sliding groove 264. The outer wall of the multi-way joint 26 at the sliding groove 264 is made of a heat-conducting material, and a heat-expanded sealing strip 265 is provided on the inner side surface of the sliding groove 264. The heat-expanded sealing strip 265 is made of a heat-expanded material. The baffle 261 is attached to the side of the heat-expanded sealing strip 265; the upper part of the baffle 261 is of a corrugated structure. Normally, there is coolant inside the circulating cooling pipe 2, and there is air in the lower air layer 262 of the baffle 261, so that the baffle 261 can float on the upper side of the coolant in the natural state, and at this time the multi-way joint 26 is in a conducting state.

[0038] When the coolant decreases, the baffle 261 can move downward under the action of natural gravity to seal the multi-way joint 26. If there is a relatively high temperature outside, it proves that the battery pack 3 may catch fire. At this time, the heat-conducting material on the side of the chute 264 can transfer heat to the heat-expandable sealing strip 265. The heat-expandable sealing strip 265 expands when heated to position and seal the baffle 261 that has already fallen. The baffle 261 is of a T-shaped structure, and the air layer 262 is located at the bottom of the T-shaped structure. The included angles on both sides of the T-shaped structure are obtuse angles. According to the principle of aerodynamics, a downward force can be given to the baffle 261 to make the seal more stable.

[0039] A plurality of temperature sensors for detecting the temperature inside the circulating cooling pipe 2 are provided on the multi-way joint 26, and the sensing ends of the temperature sensors are located inside the circulating cooling pipe 2.

[0040] Refer to Figure 4 , bellows 251 are provided on both sides of the circulation pipe 25, and a spring assembly 252 is provided inside the bellows 251. Under normal circumstances, the spring assembly 252 is in an extended state to flatten the circulation pipe 25. A composite layer 27 is provided inside the circulating cooling pipe 2, and the composite layer 27 is made of rubber material. A partition 271 is provided between the composite layer 27 and the surface of the circulating cooling pipe 2. The partition 271 is annular and is provided on both sides of the circulation pipe 25. The partition 271 includes a fixed ring 272 and a plurality of deformable fixing strips 273 fixedly connected to the fixed ring 272. When the composite layer 27 contracts inward, the deformable fixing strips 273 can bend towards the center to minimize the flow area as much as possible and improve the safety performance.

[0041] Look back Figure 1 and Figure 2 , a clamping assembly 11 is provided on the chassis bracket 1. The clamping assembly 11 includes two vertical clamping rods 12. Grooves adapted to the multi-way joint 26 are provided on the two opposite inner sides of the vertical clamping rods 12. A clamping groove is provided at the position of the multi-way joint 26 corresponding to the chute 264. The vertical clamping rods 12 are made of heat-conducting material and can be adapted to the clamping groove.

[0042] The working principle of a battery cooling pipeline assembly for a new energy vehicle in this application is: Coolant is injected into the water inlet of the circulating cooling pipe 2, and the coolant is output from the water outlet of the circulating cooling pipe 2, and then heat exchange is carried out through the heat exchanger 5, so that the entire circulating cooling pipe 2 is always at a relatively low temperature. When a pipeline is damaged somewhere, the pressure differences at the water inlet and the water outlet of the circulating pump body 4 are different, resulting in a large change in the pressure difference detected by the pressure difference sensor 24. At this time, the switching valve 22 is controlled to start through the pressure difference sensor 24, 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 water inlet and the water outlet of the circulating cooling pipe 2, thereby preventing the coolant from flowing out at the damaged position; when the coolant is in a circulating state, at this time, the baffle 261 is located above the coolant under the action of the air layer 262. When the coolant at the corresponding position does not exist, the baffle 261 will drop under the action of free fall to seal the corresponding multi-way joint 26.

[0043] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A battery cooling pipeline assembly for a new energy vehicle, characterized in that: It includes a chassis bracket (1) and a circulating cooling pipe (2) arranged inside the chassis bracket (1). Multiple groups of battery packs (3) are arranged in an array on the chassis bracket (1). The circulating cooling pipe (2) is placed between adjacent battery packs (3). The circulating cooling pipe (2) is provided with a water inlet and a water outlet. A circulating pump body (4) is connected to the water inlet, and a heat exchanger (5) is arranged at the water outlet. The circulating pump body (4) is connected to the heat exchanger (5). A connecting pipe (21) is arranged between the water inlet and the water outlet. A switching valve (22) is arranged at the water outlet of the circulating pump body (4). A drain pipe (23) is connected to the switching valve (22). The opening and closing of the switching valve (22) can control the water output of the circulating pump body (4) to be transferred from the circulating cooling pipe (2) to the drain pipe (23).

2. The battery cooling pipeline assembly for a new energy vehicle according to claim 1, wherein: A composite layer (27) is arranged inside the circulating cooling pipe (2). The composite layer (27) is made of rubber material. A partition (271) is arranged between the composite layer (27) and the surface of the circulating cooling pipe (2).

3. The battery cooling pipeline assembly for a new energy vehicle according to claim 1, characterized in that: The circulating cooling pipe (2) includes multiple sections 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). The baffle (261) can seal the multi-way joint (26).

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

5. The battery cooling pipeline assembly for a new energy vehicle according to claim 4, characterized in that: The baffle (261) is of a T-shaped structure, and the air isolation layer (262) is located at the bottom of the T-shaped structure. The included angles on both sides of the T-shaped structure are obtuse angles.

6. The battery cooling pipeline assembly for a new energy vehicle according to claim 3, characterized in that: A chute (264) is arranged on the inner side surface of the multi-way joint (26) corresponding to the position of the baffle (261). The outer wall of the multi-way joint (26) at the chute (264) is made of a heat-conducting material. A heat-expandable sealing strip (265) is arranged on the inner side surface of the chute (264). The heat-expandable sealing strip (265) is made of a heat-expandable material. The baffle (261) is attached to the side of the heat-expandable sealing strip (265).

7. The battery cooling pipeline assembly for a new energy vehicle according to claim 1, wherein: Bellows (251) are arranged on both sides of the circulating pipe (25). A spring assembly (252) is arranged inside the bellows (251). Under normal circumstances, the spring assembly (252) is in an extended state to flatten the circulating pipe (25).

8. A battery cooling pipeline assembly for a new energy vehicle according to claim 1, characterized in that: Several temperature sensors for detecting the internal temperature of the circulating cooling pipe (2) are arranged on the multi-way joint (26). The sensing ends of the temperature sensors are located inside the circulating cooling pipe (2).

9. The battery cooling pipeline assembly for a new energy vehicle according to claim 1, characterized in that: A clamping assembly (11) is provided on the chassis bracket (1). The clamping assembly (11) includes two vertical clamping rods (12). Grooves adapted to the multi-way joint (26) are formed on two opposite inner sides of the vertical clamping rods (12). A clamping groove is formed at a position of the multi-way joint (26) corresponding to the sliding groove (264). The vertical clamping rods (12) are made of a heat-conducting material and can be adapted to the clamping groove.

10. A battery cooling pipeline assembly for a new energy vehicle according to claim 1, characterized in that: The chassis bracket (1) is detachably connected to the chassis.

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