An efficient heat dissipation cooling device suitable for new energy vehicle power battery

Abstract

The application discloses a kind of high-efficiency heat dissipation cooling equipment suitable for new energy automobile power battery, comprising: battery frame;Liquid cooling plate is fixedly installed in battery frame bottom;Second cooling system, it includes refrigerant supply pipe, refrigerant recovery pipe and side cooling plate, refrigerant supply pipe is fixedly installed on battery frame side wall;Three-way proportional control valve A, main pipe inlet is connected with cooling liquid supply main pipe, one branch pipe outlet of three-way proportional control valve A is connected with first joint pipe, another branch pipe outlet is connected with second refrigerant inlet;Three-way proportional control valve B, main pipe inlet is connected with cooling liquid return main pipe, one branch pipe outlet of three-way proportional control valve A is connected with second joint pipe, another branch pipe outlet is connected with second refrigerant outlet.The application compared with prior art, solve the existing new energy automobile power battery through only through downside liquid cooling plate temperature control heat dissipation cooling efficiency low problem.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles. Background Technology

[0002] In new energy vehicles, the battery pack accounts for 40%-50% of the total vehicle weight. Placing the battery pack in the chassis can lower the vehicle's center of gravity, improve driving stability, avoid encroaching on the passenger compartment space, achieve a flat floor design, and use the vehicle frame to protect the battery pack, avoiding the risk of short circuits or thermal runaway in the event of a collision, thus improving collision safety.

[0003] Current new energy vehicle power batteries mainly rely on liquid cooling plates under the battery pack for temperature control. The circulating coolant in the liquid cooling plate absorbs the heat generated by the battery charging and discharging through heat conduction and convection. However, when the power battery is cooled only by the lower liquid cooling plate, the cooling of the upper and lower sides of the power battery is uneven and the cooling efficiency is low, resulting in low heat dissipation and cooling efficiency of the power battery. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency heat dissipation and cooling device adapted to the power batteries of new energy vehicles, so as to solve the problem of low heat dissipation and cooling efficiency of existing power batteries of new energy vehicles that rely solely on the lower liquid cooling plate for temperature control.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles, comprising: Battery frame; The liquid cooling plate is fixedly installed at the bottom of the battery frame. The liquid cooling plate includes a flow channel plate, a cover plate, a first connector pipe and a second connector pipe. The flow channel plate is provided with a first cooling flow channel. The cover plate is fixedly installed on the flow channel plate. The cover plate is provided with a first refrigerant inlet and a first refrigerant outlet. The first connector pipe is fixedly installed on the cover plate at the first refrigerant inlet and the second connector pipe is fixedly installed on the cover plate at the first refrigerant outlet. The second cooling system includes a refrigerant supply pipe, a refrigerant recovery pipe, and a side cooling plate. The refrigerant supply pipe is fixedly installed on the side wall of the battery frame. One end of the refrigerant supply pipe is closed, and the opposite end is provided with a second refrigerant inlet. The refrigerant supply pipe is provided with a number of first connectors arranged along its own length. The refrigerant recovery pipe is fixedly installed on the side wall of the battery frame. One end of the refrigerant recovery pipe is closed, and the opposite end is provided with a second refrigerant outlet. The refrigerant recovery pipe is provided with a number of second connectors arranged along its own length. The side cooling plate is provided with a second cooling channel. The liquid inlet of the side cooling plate is connected to the first connector, and the liquid outlet is connected to the second connector. Three-way proportional regulating valve A, the main pipe inlet of which is connected to a cooling liquid supply main pipe, one branch outlet of the three-way proportional regulating valve A is connected to a first joint pipe, and the other branch outlet is connected to a second refrigerant inlet; Three-way proportional regulating valve B, the main pipe inlet of which is connected to a cooling liquid return main pipe, one branch outlet of the three-way proportional regulating valve A is connected to a second joint pipe, and the other branch outlet is connected to a second refrigerant outlet.

[0006] ‌As a further description of the above technical solution: A plurality of groups of grooves are provided on the surface of the cover plate facing the flow channel plate, one group of grooves includes two grooves arranged in parallel, the positions of the grooves correspond to the transverse flow channel sections of the first cooling flow channel, the grooves form first convex ribs on the back surface of the cover plate, and the bottom of the side cooling plate is inserted between the two first convex ribs formed by one group of grooves.

[0007] As a further description of the above technical solution: The side cooling plate is detachably mounted on the refrigerant supply pipe.

[0008] As a further description of the above technical solution: The liquid inlet of the side cooling plate is connected to a first joint through a first liquid inlet joint, the first liquid inlet joint is inserted into the first joint, a tapered stepped portion is provided on the outer side of the first liquid inlet joint, a connecting sleeve is sleeved on the first liquid inlet joint, and the connecting sleeve is threadedly connected to the first joint.

[0009] As a further description of the above technical solution: A rubber sealing ring is provided at the end of the first liquid inlet joint, and the rubber sealing ring is in contact with the inner wall of the first joint.

[0010] As a further description of the above technical solution: A plurality of pressure plates are provided on the battery frame, and the pressure plates and the side cooling plates are arranged at intervals.

[0011] As a further description of the above technical solution: The pressure plate is in an inverted U-shape, the pressure plate comprises a U-shaped main body and bent edges, and symmetrically arranged bent edges are provided on both sides of the U-shaped main body.

[0012] In conclusion, due to the adoption of the above technical solutions, the beneficial effects of the present invention are: 1. In the present invention, the battery packs of the power battery for new energy vehicles in the battery frame are placed on the liquid cooling plate, side cooling plates are arranged between the side walls of two adjacent battery packs, and the side cooling plates are in contact with the battery packs, so that the side surfaces of the battery packs of the power battery are cooled by the side cooling plates, and the bottom parts are cooled by the liquid cooling plate, which solves the problem of low heat dissipation and cooling efficiency of the existing power battery for new energy vehicles that is only temperature-controlled by the lower liquid cooling plate.

[0013] 2. In this invention, the liquid cooling plate and the second cooling system supply and recover refrigerant through the same coolant supply pipe and coolant return pipe. The coolant inlet and outlet of the liquid cooling plate and the second cooling system are adjusted by a three-way proportional regulating valve to adjust the coolant flow between them, thereby adjusting the cooling efficiency of the bottom area of ​​the power battery and the area between the battery modules. This allows the cooling effect of the side and bottom of the power battery to be flexibly adjusted according to requirements. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural diagram of a high-efficiency heat dissipation and cooling device adapted to the power batteries of new energy vehicles.

[0016] Figure 2 This is a structural breakdown diagram of a high-efficiency heat dissipation and cooling device adapted to the power batteries of new energy vehicles.

[0017] Figure 3 This is a schematic diagram of the installation of the side cooling plate in a high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles.

[0018] Figure 4 This is a schematic diagram of the side cooling plate in a high-efficiency heat dissipation and cooling device adapted to the power batteries of new energy vehicles.

[0019] Figure 5 This is a structurally disassembled schematic diagram of a liquid cooling plate in a high-efficiency heat dissipation and cooling device adapted to the power batteries of new energy vehicles.

[0020] Legend: 1. Battery frame; 11. Pressure plate; 2. Liquid cooling plate; 21. Flow channel plate; 22. Cover plate; 221. First rib; 23. First connector pipe; 24. Second connector pipe; 3. Refrigerant supply pipe; 31. First connector; 4. Refrigerant recovery pipe; 5. Side cooling plate; 51. First liquid inlet connector; 511. Conical step portion; 512. Connecting sleeve; 513. Rubber sealing ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention. Example 1

[0023] Please see Figure 1-5 This invention provides a technical solution: a high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles, comprising: Battery frame 1; The liquid cooling plate 2 is fixedly installed at the bottom of the battery frame 1. The liquid cooling plate 2 includes a flow channel plate 21, a cover plate 22, a first connector pipe 23, and a second connector pipe 24. The flow channel plate 21 is provided with a first cooling flow channel. The cover plate 22 is fixedly installed on the flow channel plate 21. The cover plate 22 is provided with a first refrigerant inlet and a first refrigerant outlet. The first connector pipe 23 is fixedly installed on the cover plate 22 at the first refrigerant inlet. The second connector pipe 24 is fixedly installed on the cover plate 22 at the first refrigerant outlet. The second cooling system includes a refrigerant supply pipe 3, a refrigerant recovery pipe 4, and a side cooling plate 5. The refrigerant supply pipe 3 is fixedly installed on the side wall of the battery frame 1. One end of the refrigerant supply pipe 3 is closed, and the other end is provided with a second refrigerant inlet. The refrigerant supply pipe 3 is provided with a number of first connectors 31 arranged along its own length. The refrigerant recovery pipe 4 is fixedly installed on the side wall of the battery frame 1. One end of the refrigerant recovery pipe 4 is closed, and the other end is provided with a second refrigerant outlet. The refrigerant recovery pipe 4 is provided with a number of second connectors arranged along its own length. The side cooling plate 5 is provided with a second cooling channel. The liquid inlet of the side cooling plate 5 is connected to the first connector 31, and the liquid outlet is connected to the second connector. The three-way proportional control valve A has its main inlet connected to the coolant supply main pipe 6, and one branch outlet of the three-way proportional control valve A is connected to the first connector pipe 23, and the other branch outlet is connected to the second refrigerant inlet of the refrigerant supply pipe 3. The three-way proportional control valve B has its main inlet connected to the coolant return main pipe 7, and one branch outlet of the three-way proportional control valve A is connected to the second connector pipe 24, and the other branch outlet is connected to the second refrigerant outlet of the refrigerant recovery pipe 4.

[0024] Working principle: The battery pack of the new energy vehicle power battery is placed on the liquid cooling plate 2 within the battery frame 1, and a side cooling plate 5 is installed between the side walls of two adjacent battery packs. The side cooling plate 5 contacts the battery pack, so that the sides of the power battery pack are cooled by the side cooling plate 5 and the bottom is cooled by the liquid cooling plate 2, solving the problem of low heat dissipation and cooling efficiency of existing new energy vehicle power batteries that rely solely on the lower side liquid cooling plate for temperature control. The liquid cooling plate 2 and the second cooling system are supplied and recovered with refrigerant through the same coolant supply pipe 6 and coolant return pipe 7. The refrigerant inlet and outlet of the liquid cooling plate 2 and the second cooling system are adjusted by a three-way proportional regulating valve to adjust the coolant flow between them, thereby adjusting the cooling efficiency of the bottom area of ​​the power battery and the area between the battery modules. This allows the cooling effect of the sides and bottom of the power battery to be flexibly adjusted according to needs. Example 2

[0025] Based on the above embodiments, this embodiment further improves upon the following technical solution: a number of grooves are provided on the surface of the cover plate 22 facing the flow channel plate 21. Each groove includes two grooves arranged in parallel. The groove positions correspond to the transverse flow channel section of the first cooling flow channel. The transverse flow channel section of the first cooling flow channel is a straight flow channel extending along the width direction of the liquid cooling plate 2. The grooves form a first rib 221 on the back of the cover plate 22. The bottom of the side cooling plate 5 is inserted between the two first ribs 221 formed by the grooves.

[0026] The protrusion formed at the groove on the cover plate 22 reduces the flow velocity at that location, resulting in a faster flow velocity below the battery pack. This improves the heat exchange efficiency between the liquid cooling plate and the battery pack, and also enhances the deformation resistance of the cover plate on the liquid cooling plate, thereby improving the overall deformation resistance and reliability of the liquid cooling plate.

[0027] In addition, the two first ribs 221 formed by a set of grooves position the side cooling plate 5, effectively preventing the side cooling plate 5 from shifting. Example 3

[0028] Based on the above embodiments, this embodiment further improves upon the following technical solution: the side cooling plate 5 is detachably installed on the refrigerant supply pipe 3.

[0029] The liquid inlet of the side cooling plate 5 is connected to the first connector 31 through the first liquid inlet connector 51. The first liquid inlet connector 51 is inserted into the first connector 31. A conical step portion 511 is provided on the outside of the first liquid inlet connector 51. A connecting sleeve 512 is fitted on the first liquid inlet connector 51 and threadedly connected to the first connector 31. The conical step portion 511 prevents the connecting sleeve 512 from disengaging from the first liquid inlet connector 51, thereby realizing the connection between the first liquid inlet connector 51 and the first connector 31 and realizing the detachability of the side cooling plate 5.

[0030] Similarly, the liquid outlet of the side cooling plate 5 is connected to the second connector of the refrigerant recovery pipe 4 through the second liquid outlet connector. The structure and installation method of the second liquid outlet connector are the same as those of the first liquid inlet connector 51. Example 4

[0031] Based on the above embodiments, this embodiment further improves upon the following technical solution: a rubber sealing ring 513 is provided at the end of the first liquid inlet connector 51, and the rubber sealing ring 513 contacts the inner wall of the first connector 31.

[0032] The first liquid inlet connector 51 is inserted into the insertion groove on the inner wall of the first connector 31, and the end face of the rubber sealing ring 513 contacts the bottom surface of the insertion groove, effectively preventing leakage between the first liquid inlet connector 51 and the first connector 31. Example 5

[0033] Based on the above embodiments, this embodiment further improves upon the following technical solution: A plurality of pressure plates 11 are provided on the battery frame 1, with the pressure plates 11 and the side cooling plates 5 arranged at intervals. The pressure plates 11 are U-shaped, comprising a U-shaped main body and bent edges, with symmetrically arranged bent edges on both sides of the U-shaped main body.

[0034] The bent edges at the upper and lower ends of the U-shaped body respectively press and position the refrigerant supply pipe 3 and the refrigerant recovery pipe 4. The concave U-shaped body is fixed to the battery frame 1 by bolts or welding to prevent the connection structure of the pressure plate 11 from protruding from the bent edges and to avoid affecting the battery pack.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles, characterized in that, Comprising: a battery frame; a liquid cooling plate fixedly mounted at the bottom of the battery frame, wherein the liquid cooling plate comprises a flow channel plate, a cover plate, a first joint pipe and a second joint pipe, a first cooling flow channel is arranged on the flow channel plate, the cover plate is fixedly mounted on the flow channel plate, a first refrigerant inlet and a first refrigerant outlet are arranged on the cover plate, the first joint pipe is fixedly mounted on the cover plate at the first refrigerant inlet, and the second joint pipe is fixedly mounted on the cover plate at the first refrigerant outlet; a second cooling system comprising a refrigerant supply pipe, a refrigerant recovery pipe and side cooling plates, wherein the refrigerant supply pipe is fixedly mounted on a side wall of the battery frame, one end of the refrigerant supply pipe is closed, and a second refrigerant inlet is arranged at the opposite other end, a plurality of first joints arranged along the length direction of the refrigerant supply pipe are arranged on the refrigerant supply pipe, the refrigerant recovery pipe is fixedly mounted on the side wall of the battery frame, one end of the refrigerant recovery pipe is closed, and a second refrigerant outlet is arranged at the opposite other end, a plurality of second joints arranged along the length direction of the refrigerant recovery pipe are arranged on the refrigerant recovery pipe, a second cooling flow channel is arranged in each side cooling plate, a liquid inlet of the side cooling plate is connected with the first joint, and a liquid outlet of the side cooling plate is connected with the second joint; a three-way proportional regulating valve A, wherein a main pipe inlet of the three-way proportional regulating valve A is connected with a cooling liquid supply main pipe, one branch pipe outlet of the three-way proportional regulating valve A is connected with the first joint pipe, and the other branch pipe outlet of the three-way proportional regulating valve A is connected with the second refrigerant inlet; a three-way proportional regulating valve B, wherein a main pipe inlet of the three-way proportional regulating valve B is connected with a cooling liquid return main pipe, one branch pipe outlet of the three-way proportional regulating valve A is connected with the second joint pipe, and the other branch pipe outlet of the three-way proportional regulating valve A is connected with the second refrigerant outlet; a plurality of groups of grooves are arranged on a surface of one side of the cover plate facing the flow channel plate, one group of grooves comprises two grooves arranged in parallel, the positions of the grooves correspond to transverse flow channel sections of the first cooling flow channel, the grooves form first reinforcing ribs on the back surface of the cover plate, and the bottom of the side cooling plate is inserted between the two first reinforcing ribs formed by one group of the grooves; protrusions formed at the grooves on the cover plate reduce the flow velocity at the positions, so that the flow velocity below the battery pack is increased, the heat exchange efficiency between the liquid cooling plate and the battery pack is improved, and the deformation resistance of the cover plate on the liquid cooling plate is enhanced.

2. The high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles according to claim 1, characterized in that, the side cooling plate is detachably mounted on the refrigerant supply pipe.

3. The high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles according to claim 2, characterized in that, a liquid inlet of the side cooling plate is connected with the first joint through a first liquid inlet joint, the first liquid inlet joint is inserted into the first joint, a tapered step portion is arranged on the outer side of the first liquid inlet joint, a connecting sleeve is sleeved on the first liquid inlet joint, and the connecting sleeve is in threaded connection with the first joint.

4. The high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles according to claim 3, characterized in that, an end portion of the first liquid inlet joint is provided with a rubber sealing ring, and the rubber sealing ring is in contact with an inner wall of the first joint.

5. The high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles according to claim 1, characterized in that, a plurality of pressing plates are arranged on the battery frame, and the pressing plates are arranged at intervals from the side cooling plate.

6. The high-efficiency heat dissipation and cooling device adapted to the power battery of new energy vehicles according to claim 5, characterized in that, the pressing plate is in an Ω shape, the pressing plate comprises a U-shaped main body and bent edges, and the symmetrically arranged bent edges are arranged on two sides of the U-shaped main body.

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