Integrated uniform temperature direct cooling battery heat exchange plate

Abstract

This invention provides an integrated uniform temperature direct cooling battery heat exchange plate, comprising: a left current collector, a right current collector, a large harmonica tube, a small harmonica tube, a water inlet pipe, a water outlet pipe, and a temperature distribution plate; the left current collector comprises: a left current collector pipe, a left current collector shell, and a left current collector cover; the left current collector pipe is a hollow pipe closed at both ends; the inner surface of the left current collector shell is fitted onto the outer surface of the left current collector pipe and located on both sides of the first surface, the cross-sectional side of the left current collector shell being longer than the cross-sectional side of the left current collector pipe; the left current collector cover and the left current collector shell are fitted together facing each other; the left current collector pipe forms a first cavity; the left current collector shell, the first surface, and the left current collector cover form a second cavity; the left side of the small harmonica tube is closed and connected to a first pipe; the left side of the large harmonica tube is closed and connected to a second pipe. This invention's integrated uniform temperature direct cooling battery heat exchange plate is an integral current collector structure, shortening the pipe connection path, simplifying the structure, effectively reducing frictional resistance, and achieving battery heat exchange.

Description

Technical Field

[0001] This invention relates to the field of battery thermal management technology, and in particular to an integrated uniform temperature direct cooling battery heat exchange plate. Background Technology

[0002] With the development of new energy vehicle technology, operational safety has become increasingly important. The lithium-ion batteries in new energy vehicles are prone to thermal runaway due to overcharging, puncture, or collisions, which can lead to smoke, fire, or even explosions. Therefore, battery thermal management is of paramount importance.

[0003] Current battery thermal management technologies primarily employ liquid cooling heat exchange and utilize water and ethylene glycol as the heat exchange medium, forming a closed flow channel through aluminum plates for circulating heat exchange. Due to the characteristics of the heat exchange materials, this heat exchange structure cannot meet the requirements of all battery operating conditions, and its heat exchange efficiency is much lower than that of direct refrigerant cooling. In applications, the multiphase nature of the refrigerant's properties makes it difficult to control, resulting in excessive temperature differences between the cold plates and system voltage drops. This can easily lead to overcooling or overheating of the battery, severely impacting its lifespan.

[0004] Therefore, how to use the direct cooling mode of refrigerant for battery thermal management while ensuring uniform distribution of refrigerant flow is an urgent problem to be solved. Summary of the Invention

[0005] In view of the shortcomings and limited application scope of the prior art, the purpose of this invention is to provide an integrated uniform temperature direct cooling battery heat exchange plate to solve the problem that the prior art fails to ensure uniform refrigerant flow distribution while using refrigerant direct cooling mode for battery thermal management.

[0006] To achieve the above and other related objectives, this invention provides an integrated uniform temperature direct cooling battery heat exchange plate, comprising: a left current collector, a right current collector, a large harmonica tube, a small harmonica tube, a water inlet pipe, a water outlet pipe, and a uniform temperature plate; the left current collector comprises: a left current collector tube, a left current collector shell, and a left current collector cover; the left current collector tube is a hollow pipe closed at both ends; the structure of the left current collector shell is the same as that of the left current collector tube, but the cross-section of the left current collector shell lacks the side corresponding to the first face compared to the cross-section of the left current collector tube, and the length of the left current collector shell is longer than the length of the left current collector tube; the inner surface of the left current collector shell is fitted onto the outer surface of the left current collector tube and is located on both sides of the first face, and the side of the cross-section of the left current collector shell is longer than the side of the cross-section of the left current collector tube; the first face is one side of the left current collector tube; the structure of the left current collector cover is the same as that of the left current collector tube. The shell structure includes: a left manifold cover and a left manifold shell nested together facing each other, located on both sides of the first surface; the inner surface of the left manifold cover is in close contact with the outer surface of the left manifold shell; the left manifold tube forms the first cavity; the left manifold shell, the first surface, and the left manifold cover form the second cavity; the left side of the small harmonica tube is closed and connected to a first tube, which is used to connect to the first cavity; the left side of the large harmonica tube is closed and connected to a second tube, which is used to connect to the second cavity; the right side of the small harmonica tube has a first opening; the right side of the large harmonica tube has a second opening; the small harmonica tube and the large harmonica tube form a group and are connected to the right manifold; the top of the left manifold is provided with an inlet pipe and an outlet pipe; the inlet pipe is connected to the first cavity; the outlet pipe is connected to the second cavity; a heat spreader is placed on the top of the large harmonica tube and the small harmonica tube.

[0007] In one embodiment of the present invention, the right manifold is a hollow pipe closed at both ends, and a baffle is set inside the pipe based on the number of groups consisting of small harmonica tubes and large harmonica tubes; the length of the right manifold is the same as the length of the left manifold cover.

[0008] In one embodiment of the present invention, it further includes: a pressure plate connector, which is used to connect the inlet pipe and the outlet pipe.

[0009] In one embodiment of the present invention, when the refrigerant enters the first cavity from the inlet pipe, it flows into the small harmonica tube to the right collector through the first pipe; it flows back to the second cavity through the large harmonica tube which forms a group with the small harmonica tube; and then flows out through the outlet pipe.

[0010] In one embodiment of the present invention, it further includes: an electric heating film, a plastic retainer, and an elastic support; the electric heating film is placed on the bottom surface of the small harmonica tube; the plastic retainer is placed below the electric heating film for fixing the electric heating film; the stacked height of the small harmonica tube, the electric heating film, and the plastic retainer is equal to the height of the large harmonica tube; the top surface of the small harmonica tube is flush with the top surface of the large harmonica tube; the bottom surface of the large harmonica tube and the bottom surface of the plastic retainer are covered with an elastic support.

[0011] In one embodiment of the present invention, the left current collector and the harmonica tube, the left current collector and the small harmonica tube, the right current collector and the harmonica tube, and the right current collector and the small harmonica tube are all brazed together.

[0012] In one embodiment of the present invention, the pressure plate joint and the water inlet pipe, and the pressure plate joint and the water outlet pipe are all flame welded.

[0013] In one embodiment of the present invention, the shape of the left manifold includes, but is not limited to, a cuboid.

[0014] In one embodiment of the present invention, the area of ​​the large harmonica tube is larger than that of the small harmonica tube; the shape of the large harmonica tube is the same as that of the small harmonica tube; the shape of the large harmonica tube includes, but is not limited to, a flat tube shape.

[0015] This invention provides a battery direct cooling unit, comprising: an integrated uniform temperature direct cooling battery heat exchange plate, a condenser, and a compressor.

[0016] As described above, the present invention provides an integrated uniform temperature direct cooling battery heat exchange plate, which has the following beneficial effects:

[0017] (1) Integrated manifold structure, the manifold contains two cavities, shortens the pipeline connection path, simplifies the structure, and effectively reduces friction resistance.

[0018] (2) The design of the large and small harmonica tubes can adapt to the resistance of different states before and after the refrigerant phase change evaporation, thereby reducing the pressure drop.

[0019] (3) The temperature equalization plate balances the temperature difference before and after the inlet and outlet of the harmonica tubes to achieve a uniform temperature effect.

[0020] (4) Coupled electric heating film, with a compact structure. Attached Figure Description

[0021] Figure 1 The diagram shown is a structural schematic of an embodiment of the integrated uniform temperature direct cooling battery heat exchanger of the present invention.

[0022] Figure 2 The diagram shows a schematic cross-section of the left current collector in one embodiment of the integrated uniform temperature direct cooling battery heat exchanger of the present invention.

[0023] Figure 3 The diagram shows a first cavity and a second cavity in one embodiment of the integrated uniform temperature direct cooling battery heat exchanger of the present invention.

[0024] Figure 4 The diagram shows a refrigerant flow in one embodiment of the integrated uniform temperature direct cooling battery heat exchanger of the present invention.

[0025] Figure 5The diagram shows a cross-sectional view of the large and small harmonica tubes in one embodiment of the integrated uniform temperature direct cooling battery heat exchange plate of the present invention.

[0026] Component designation explanation

[0027] Detailed Implementation

[0028] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] The integrated uniform temperature direct cooling battery heat exchange plate of the present invention is an integrated current collector structure. The current collector contains two cavities, shortens the pipeline connection path, simplifies the structure, and effectively reduces friction resistance. The design of the large and small harmonica tubes can adapt to the resistance of different states before and after the refrigerant phase change evaporation, thereby reducing pressure drop. The temperature plate balances the temperature difference before and after entering and exiting the large and small harmonica tubes to achieve a uniform temperature effect. The coupled electric heating film has a compact structure.

[0031] like Figure 1 As shown, in one embodiment, the integrated uniform temperature direct cooling battery heat exchange plate of the present invention includes: a left current collector 1, a right current collector 2, a large harmonica tube 3, a small harmonica tube 4, a water inlet pipe 5, a water outlet pipe 6, and a uniform temperature plate 7; the left current collector 1 includes: a left current collector pipe 11, a left current collector shell 12, and a left current collector cover 13; as shown Figure 2As shown in the schematic diagram of the cross-section of the left manifold in this embodiment, the left manifold 11 is a hollow pipe closed at both ends; the structure of the left manifold shell 12 is the same as that of the left manifold 11, and the cross-section of the left manifold shell 12 lacks the side corresponding to the first surface 14 compared to the cross-section of the left manifold 11, and the length of the left manifold shell 12 is longer than the length of the left manifold 11; the inner surface of the left manifold shell 12 is fitted onto the outer surface of the left manifold 11; and it is located on both sides of the first surface 14, the side of the cross-section of the left manifold shell 12 is longer than the side of the cross-section of the left manifold 11; the first surface 14 is one side of the left manifold 11; the structure of the left manifold cover 13 is the same as that of the left manifold shell 12; the left manifold cover 13 and the left manifold shell 12... They are nested together facing each other; and located on both sides of the first surface 14, the inner surface of the left collector cover 13 is tightly attached to the outer surface of the left collector shell 12; the left collector tube 11 forms the first cavity 8; the left collector shell 12, the first surface 14, and the left collector cover 13 form the second cavity 9; the left side of the small harmonica tube 4 is closed and connected to the first tube 10, which is used to connect to the first cavity 8; the left side of the large harmonica tube 3 is closed and connected to the second tube 15, which is used to connect to the second cavity 9; the right side of the small harmonica tube 4 is the first opening; the right side of the large harmonica tube 3 is the second opening; the small harmonica tube 4 and the large harmonica tube 3 form a group and are connected to the right collector 2; the top of the left collector 1 is provided with an inlet pipe 5 and an outlet pipe 6; as Figure 3 As shown in the schematic diagram of the first cavity and the second cavity in this embodiment, the water inlet pipe 5 is connected to the first cavity 8; the water outlet pipe 6 is connected to the second cavity 9; and a heat equalization plate 7 is placed on the top of the large harmonica pipe 3 and the small harmonica pipe 4.

[0032] Specifically, the right manifold 2 is a hollow pipe closed at both ends, and a partition is set inside the pipe based on the number of groups consisting of the small harmonica tube 4 and the large harmonica tube 3; the length of the right manifold 2 is the same as the length of the left manifold cover 13.

[0033] For example, if the number of groups formed by the small harmonica tube 4 and the large harmonica tube 3 is 4, then the corresponding right collector 2 has 3 baffles in the pipe, forming 4 partition spaces, and each partition space is connected to a group of small harmonica tubes 4 and large harmonica tubes 3.

[0034] More specifically, it also includes: a pressure plate connector 16, which is used to connect the water inlet pipe 5 and the water outlet pipe 6.

[0035] More specifically, such as Figure 4 As shown in the schematic diagram of refrigerant flow in this embodiment, when the refrigerant enters the first cavity 8 from the inlet pipe 5, it flows into the small harmonica tube 4 to the right collector 2 through the first pipe 10; it flows back to the second cavity 9 through the large harmonica tube 3, which forms a group with the small harmonica tube 4; and then flows out through the outlet pipe 6.

[0036] For example, if the number of groups consisting of small harmonica tube 4 and large harmonica tube 3 is 4, then when the refrigerant enters the first cavity 8 from the inlet pipe 5, the first pipe 10 corresponding to any of the 4 groups of small harmonica tubes 4 will transfer the refrigerant to the corresponding small harmonica tube 4, and then flow into the corresponding partition space in the right collector 2. Through the partition space, it flows into the large harmonica tube 3 that is in the same group as the small harmonica tube 4, and then flows back into the second cavity 9 through the second pipe 15 connected to the large harmonica tube 3, and flows out through the connected outlet pipe 6, thus forming a refrigerant circuit.

[0037] More specifically, it also includes: an electrically heated film 17, a plastic retainer 18, and an elastic support 19; such as Figure 5 As shown in the schematic diagram of the cross-section of the small and large harmonica tubes in this embodiment, the electric heating film 17 is placed on the bottom surface of the small harmonica tube 4; the plastic retainer 18 is placed below the electric heating film 17 to fix the electric heating film 17; the stacked height of the small harmonica tube 4, the electric heating film 17, and the plastic retainer 18 is equal to the height of the large harmonica tube 3; the top surface of the small harmonica tube 4 is flush with the top surface of the large harmonica tube 3; the bottom surface of the large harmonica tube 3 and the bottom surface of the plastic retainer 18 are covered with elastic supports 19. For example, the elastic supports 19 are elastic heat insulation cotton.

[0038] More specifically, the left current collector 1 and the harmonica tube 3, the left current collector 1 and the harmonica tube 4, the right current collector 2 and the harmonica tube 3, and the right current collector 2 and the harmonica tube 4 are all brazed together.

[0039] More specifically, the pressure plate joint 16 and the water inlet pipe 5, and the pressure plate joint 16 and the water outlet pipe 6 are all flame welded.

[0040] More specifically, the shape of the left manifold 11 includes, but is not limited to, a cuboid.

[0041] More specifically, the area of ​​the large harmonica tube 3 is larger than that of the small harmonica tube 4; the shape of the large harmonica tube 3 is the same as that of the small harmonica tube 4; the shape of the large harmonica tube 3 includes, but is not limited to, a flat tube shape.

[0042] More specifically, the present invention provides a battery direct cooling unit, including: an integrated uniform temperature direct cooling battery heat exchange plate, a condenser, a compressor, and an evaporator, an expansion valve, a liquid receiver dryer, etc.

[0043] In summary, the integrated uniform temperature direct cooling battery heat exchange plate of the present invention is an integrated current collector structure. The current collector includes two cavities, shortening the pipeline connection path, simplifying the structure, and effectively reducing friction resistance. The design of the large and small harmonica tubes can adapt to the resistance of the refrigerant before and after phase change evaporation, thereby reducing pressure drop. The temperature distribution plate balances the temperature difference before and after entering and exiting the large and small harmonica tubes, achieving a uniform temperature effect. Furthermore, the coupled electric heating film results in a compact structure. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An integrated uniform temperature direct cooling type battery heat exchange plate, characterized by, include: Left collector, right collector, large harmonica tube, small harmonica tube, inlet pipe, outlet pipe, heat spreader; The left manifold includes: a left manifold tube, a left manifold shell, and a left manifold cover; The left manifold is a hollow pipe closed at both ends; the structure of the left manifold shell is the same as that of the left manifold, but the cross-section of the left manifold shell lacks the side corresponding to the first face, and the length of the left manifold shell is longer than that of the left manifold; the inner surface of the left manifold shell is fitted onto the outer surface of the left manifold, and is located on both sides of the first face; the side of the cross-section of the left manifold shell is longer than the side of the cross-section of the left manifold; the first face is one side of the left manifold. The structure of the left collector cover is the same as that of the left collector shell; the left collector cover and the left collector shell are sleeved together facing each other; and are located on both sides of the first surface, with the inner surface of the left collector cover tightly attached to the outer surface of the left collector shell; The left manifold forms the first cavity; the left manifold shell, the first surface, and the left manifold cover form the second cavity; The left side of the harmonica tube is closed and connected to a first tube, which is used to connect to the first cavity. The left side of the harmonica tube is closed and connected to a second tube, which is used to connect to the second cavity. The right side of the small harmonica tube is the first opening; the right side of the large harmonica tube is the second opening; the small harmonica tube and the large harmonica tube form a group and are connected to the right collector. The top of the left collector is provided with the inlet pipe and the outlet pipe; The inlet pipe is connected to the first cavity; the outlet pipe is connected to the second cavity; The temperature equalization plate is placed on top of the large harmonica tube and the small harmonica tube.

2. The integrated uniform temperature direct cooling battery heat exchange panel according to claim 1, characterized in that, The right manifold is a hollow pipe closed at both ends, and a baffle is set inside the pipe based on the number of groups formed by the small harmonica tube and the large harmonica tube; the length of the right manifold is the same as the length of the left manifold cover.

3. The integrated uniform temperature direct cooling battery heat exchange panel according to claim 2, characterized in that, Also includes: A pressure plate connector is used to connect the inlet pipe and the outlet pipe.

4. The integrated uniform temperature direct cooling battery heat exchange panel according to claim 3, characterized in that, include: When the refrigerant enters the first cavity from the inlet pipe, it flows through the first pipe into the harmonica tube and then into the right manifold. The water flows back to the second cavity through the large harmonica tube, which forms a group with the small harmonica tube; then it flows out through the outlet pipe.

5. The integrated uniform temperature direct cooling battery heat exchanger according to claim 1, characterized in that, It also includes: electric heating film, plastic retaining walls, and elastic supports; The electric heating film is placed on the bottom surface of the harmonica tube; The plastic retainer is placed below the electric heating film to fix the electric heating film. The stacked height of the small harmonica tube, the electric heating film, and the plastic gate is equal to the height of the large harmonica tube; The top surface of the small harmonica tube is flush with the top surface of the large harmonica tube; The bottom surface of the harmonica tube and the bottom surface of the plastic gate are provided with the elastic support.

6. The integrated uniform temperature direct cooling battery heat exchanger according to claim 1, characterized in that, The left current collector and the harmonica tube, the left current collector and the harmonica tube, the right current collector and the harmonica tube, and the right current collector and the harmonica tube are all brazed together.

7. The integrated uniform temperature direct cooling battery heat exchanger according to claim 3, characterized in that, The pressure plate joint and the water inlet pipe, as well as the pressure plate joint and the water outlet pipe, are all welded by flame welding.

8. The integrated uniform temperature direct cooling battery heat exchanger according to claim 1, characterized in that, The shape of the left manifold includes, but is not limited to, a cuboid.

9. The integrated uniform temperature direct cooling battery heat exchanger according to claim 1, characterized in that, The area of ​​the large harmonica tube is larger than that of the small harmonica tube; the shape of the large harmonica tube is the same as that of the small harmonica tube; the shape of the large harmonica tube includes, but is not limited to, a flat tube shape.

10. A battery direct cooling unit, characterized in that, include: The integrated uniform temperature direct cooling battery heat exchange plate, condenser, and compressor as described in any one of claims 1-9.

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