A battery pack heat exchanger for new energy vehicles

Abstract

The present invention discloses a heat exchanger for a new energy vehicle battery pack, which includes an installation box. An outlet pipe and an inlet pipe are respectively fixedly sleeved in the inner cavity of the installation box. Opposite ends of the outlet pipe and the inlet pipe are connected to two connecting pipes through a two-way joint. A first heat dissipation mechanism is arranged at opposite ends of the two connecting pipes, and a second heat dissipation mechanism is symmetrically arranged on a surface opposite to the first heat dissipation mechanism. The present invention relates to the technical field of heat exchangers. This heat exchanger for a new energy vehicle battery pack solves the problem that although the existing radiator can dissipate heat from the battery pack in the vehicle, it can only perform heat and cold alternation on the hot air generated by the battery pack working and then take away the hot air through the coolant. However, this method of replacing hot air is relatively slow. In addition, it can only cool the hot air dissipated from the surface of the battery pack to maintain the working temperature of the battery pack. However, since the battery pack is composed of multiple battery groups, it is not easy to dissipate the temperature between each group, which will affect the service life of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of radiators, and particularly to a heat exchanger for a new energy vehicle battery pack. Background Art

[0002] With the development of power electronics technology, there are more and more high-power, large-size, and high heat flux density electronic components, and the heat dissipation power consumption is increasing. The heat dissipation problem has become one of the important factors restricting its further development. In recent years, heat pipe radiators have been widely used in power electronics technology due to their excellent heat dissipation performance. The inside of the heat pipe is evacuated, filled with an appropriate working medium, the pipe wall has a wick, one end is the evaporation end, and the other end is the condensation end. When one end of the heat pipe is heated, the liquid in the capillary quickly evaporates, and the vapor flows to the other end under a small pressure difference and releases heat, then condenses back into a liquid, and the liquid flows back to the evaporation end along the porous material by capillary force, and this cycle continues. The heat is conducted from one end of the heat pipe to the other end. For some equipment with special heat dissipation requirements, such as electric vehicles, the battery pack is sealed and installed in a cabinet, and it is required to conduct the heat in the sealed environment of the cabinet in time. Although the existing radiators can dissipate the heat of the battery pack in the car, they can only perform heat and cold alternation on the hot air generated by the battery pack working, and then take away the hot air through the coolant. However, this method of replacing the hot air is relatively slow. In addition, it can only cool the hot air dissipated from the surface of the battery pack to maintain the working temperature of the battery pack. However, since the battery pack is composed of multiple battery groups, the temperature between each group is not easy to dissipate, which will affect the service life of the battery. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the present invention provides a heat exchanger for a new energy vehicle battery pack, which solves the problems that the heat exchanger takes away the hot air through the coolant, but this method of replacing the hot air is relatively slow. In addition, it can only cool the hot air dissipated from the surface of the battery pack to maintain the working temperature of the battery pack. However, since the battery pack is composed of multiple battery groups, the temperature between each group is relatively high and not easy to dissipate, which will affect the service life of the battery.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A heat exchanger for a new energy vehicle battery pack, including an installation box, the inner cavity of the installation box is fixedly sleeved with an outlet pipe and an inlet pipe respectively, the opposite ends of the outlet pipe and the inlet pipe are communicated with two connecting pipes through a two-way joint, and a first heat dissipation mechanism is arranged at the opposite ends of the two connecting pipes, and a second heat dissipation mechanism is symmetrically arranged on the opposite side of the first heat dissipation mechanism.

[0007] The first heat dissipation mechanism includes a lower cover plate and an upper cover plate. A U-shaped drainage groove is fixedly formed at the top of the lower cover plate, and connection holes are symmetrically and fixedly formed at the top of the upper cover plate.

[0008] The second heat dissipation mechanism includes two heat dissipation plates and a fixing plate. One side of the two heat dissipation plates facing each other is connected through two rubber pads. Second chutes are fixedly formed at the top of the two heat dissipation plates. A sliding block is slidably sleeved in the inner cavity of the second chute. A connecting plate is fixedly connected to the surface of the sliding block. First chutes are fixedly formed on one side of the two fixing plates facing each other. A sliding plate is slidably sleeved in the inner cavity of the first chute. A plurality of second screw holes are symmetrically and fixedly formed on the inner wall of the fixing plate. A first screw hole is fixedly formed on the surface of the middle of the sliding plate. A bolt is threadedly sleeved in the inner cavity of the first screw hole. A pushing block is fixedly connected to the lower surface of the sliding plate.

[0009] Preferably, the two heat dissipation plates are symmetrically and fixedly connected to the opposite sides of the lower cover plate, and the top of the sliding plate is flush with the port of the fixing plate.

[0010] Preferably, the opposite ends of the connecting plate are fixedly connected to the sliding blocks integrally extended from the side surface of the sliding plate, and the connecting plate is L-shaped.

[0011] Preferably, the two sides of the two heat dissipation plates are attached to the opposite sides of the fixing plate, and the opposite sides extend outside the inner cavity of the fixing plate.

[0012] Preferably, the tops of the heat dissipation plates and the fixing plate are flush with each other, and the bottoms of the heat dissipation plates are in contact with the opposite sides of the lower cover plate. The heat dissipation plates are made of copper plates.

[0013] Preferably, the first screw hole is aligned with the plurality of second screw holes and has the same size, and one end of the bolt is threadedly sleeved with the plurality of second screw holes.

[0014] Preferably, the first chute, the sliding plate, the second chute, and the sliding block are all cross-shaped.

[0015] Preferably, the lower cover plate and the upper cover plate are covered and connected to each other, and the connection hole is fixedly communicated with one end of the connecting pipe.

[0016] Preferably, a cooler is fixedly sleeved on the surface of the liquid inlet pipe.

[0017] Beneficial Effects

[0018] The present invention provides a battery pack heat exchanger for new energy vehicles. Compared with the prior art, the following

[0019] Beneficial effects are achieved:

[0020] 1. The heat exchanger for the new energy vehicle battery pack installs the first heat dissipation mechanism on the front and back of the battery pack respectively, places the second heat dissipation mechanism between each battery group, then installs the installation box on the outer side inside the battery pack, and the hot end of the refrigerator is also located outside the refrigerator. The liquid outlet pipe and the liquid inlet pipe are connected to the coolant tank. When cooling is required, the coolant in the coolant tank is transported into the inner cavity of the liquid inlet pipe by the coolant pump, and the coolant is divided into two paths through the two-way joint and enters the connecting pipe, and then enters the first heat dissipation mechanism to take away the high temperature. At the same time, the heat dissipation plate arranged between the battery groups will absorb the temperature between the battery packs, and the temperature can be taken away by the coolant. The first heat dissipation mechanism and the heat dissipation plate can dissipate heat on the surface of the battery pack and between the batteries, thus solving the problem that although the existing radiator can dissipate heat from the battery pack in the car, it can only perform heat and cold alternation on the hot air generated by the battery pack working, and then take away the hot air through the coolant. However, the replacement of the hot air in this way is relatively slow. In addition, it can only cool the hot air dissipated from the surface of the battery pack to maintain the working temperature of the battery pack. However, since the battery pack is composed of multiple battery groups, the temperature between each group will be relatively high, which will affect the service life of the battery.

[0021] 2. For the heat exchanger of the new energy vehicle battery pack, by turning the bolts and removing the bolts on both sides, the sliding plate is pushed by the pushing block to rise and fall in the inner cavity of the fixing plate. Through the connection of the connecting plate, the heat dissipation plate is driven to follow and rise and fall in the inner cavity of the fixing plate. When the height is determined, then align the first screw hole with the corresponding position and reinstall the bolts. In this way, according to the height of different battery packs, the heat dissipation plate can be located at the middle position between the battery packs, which is applicable to different battery packs. In addition, when the heat dissipation plate is placed between the battery packs, the two heat dissipation plates can be automatically tensioned through the connected rubber pads. At the same time, the sliding block will slide tightly in the inner cavity of the second chute, so that the heat dissipation plate closely adheres to the inner wall in the middle of the battery pack.

[0022] 3. For the heat exchanger of the new energy vehicle battery pack, when the coolant that takes away the temperature passes through the inner cavity of the installation box through the liquid outlet pipe, the refrigerator starts to operate and refrigerate to cool the coolant that takes away the temperature, making the cooling speed of the coolant faster. The circulated coolant enters the first heat dissipation mechanism through the liquid inlet pipe for heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention;

[0024] Figure 2 It is a partial cross-sectional view of the structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the first heat dissipation mechanism of the structure of the present invention;

[0026] Figure 4 Schematic diagram of the second heat dissipation mechanism of the structure of the present invention;

[0027] Figure 5 Partial schematic diagram of the second heat dissipation mechanism of the structure of the present invention;

[0028] Figure 6 Schematic diagram of the fixing plate of the structure of the present invention;

[0029] Figure 7 Front schematic diagram of the fixing plate of the structure of the present invention;

[0030] Figure 8 Partial schematic diagram of the second heat dissipation mechanism of the structure of the present invention;

[0031] Figure 9 Structure of the present invention Figure 8 Local enlarged view of part A in;

[0032] Figure 10 Schematic diagram of the heat dissipation plate and rubber pad of the structure of the present invention.

[0033] In the figure: 1, installation box; 2, cooler; 3, liquid outlet pipe; 4, liquid inlet pipe; 5, two-way joint; 6, connecting pipe; 7, first heat dissipation mechanism; 71, lower cover plate; 72, upper cover plate; 73, connection hole; 74, U-shaped drainage groove; 8, second heat dissipation mechanism; 81, heat dissipation plate; 82, fixing plate; 83, sliding plate; 84, bolt; 85, pushing block; 86, first screw hole; 87, rubber pad; 88, first sliding groove; 810, second sliding groove; 811, sliding block; 812, connecting plate; 813, second screw hole. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figure 1-2 , an embodiment of the present invention provides a technical solution: a battery pack heat exchanger for a new energy vehicle, including an installation box 1, the inner cavity of the installation box 1 is fixedly sleeved with a liquid outlet pipe 3 and a liquid inlet pipe 4 respectively, and the opposite ends of the liquid outlet pipe 3 and the liquid inlet pipe 4 are connected with two connecting pipes 6 through a two-way joint 5, and the opposite ends of the two connecting pipes 6 are provided with a first heat dissipation mechanism 7, and a second heat dissipation mechanism 8 is symmetrically arranged on the opposite side of the first heat dissipation mechanism 7, and a cooler 2 is fixedly sleeved on the surface of the liquid inlet pipe 4.

[0036] Wherein, the hot end of the cooler 2 is located outside the installation box 1, and the cold end is located inside the installation box 1.

[0037] Please refer to Figure 3 , the first heat dissipation mechanism 7 includes a lower cover plate 71 and an upper cover plate 72. A U-shaped drainage groove 74 is fixedly opened at the top of the lower cover plate 71, and connection holes 73 are symmetrically and fixedly opened at the top of the upper cover plate 72. The lower cover plate 71 and the upper cover plate 72 are covered and connected to each other, and one end of the connection hole 73 is fixedly communicated with one end of the connecting pipe 6.

[0038] Please refer to Figures 4-10 , the second heat dissipation mechanism 8 includes two heat dissipation plates 81 and a fixing plate 82. The opposite surfaces of the two heat dissipation plates 81 are connected by two rubber pads 87. Second chutes 810 are fixedly opened at the tops of the two heat dissipation plates 81. A sliding block 811 is slidably sleeved in the inner cavity of the second chute 810. A connecting plate 812 is fixedly connected to the surface of the sliding block 811. First chutes 88 are fixedly opened on the opposite surfaces of the two fixing plates 82. A sliding plate 83 is slidably sleeved in the inner cavity of the first chute 88. A plurality of second screw holes 813 are symmetrically and fixedly opened on the inner walls of the fixing plates 82. A first screw hole 86 is fixedly opened on the middle surface of the sliding plate 83. A bolt 84 is threadedly sleeved in the inner cavity of the first screw hole 86. A pushing block 85 is fixedly connected to the lower surface of the sliding plate 83. The two heat dissipation plates 81 are symmetrically and fixedly connected to the opposite surfaces of the lower cover plate 71. The top of the sliding plate 83 is flush with the port of the fixing plate 82. The opposite ends of the connecting plate 812 are fixedly connected to the sliders integrally extended from the side surface of the sliding plate 83, and the connecting plate 812 is L-shaped, and the L-shape will not make the connecting plate 812 wider than the surface of the fixing plate 82.

[0039] Both sides of the two heat dissipation plates 81 are attached to the opposite surfaces of the fixing plate 82, and the opposite surfaces extend outside the inner cavity of the fixing plate 82. The heat dissipation plates 81 are made of copper plates, which is convenient for heat absorption.

[0040] The tops of the heat dissipation plates 81 and the fixing plate 82 are flush with each other, and the bottoms of the heat dissipation plates 81 are in contact with the opposite surfaces of the lower cover plate 71. The first screw hole 86 is aligned with the plurality of second screw holes 813 and has the same size. One end of the bolt 84 is threadedly sleeved with the plurality of second screw holes 813 for fixing at different positions.

[0041] Both the first chute 88, the sliding plate 83 and the second chute 810, the sliding block 811 are cross-shaped. The cross-shape can prevent falling and the sliding is more stable.

[0042] During use, first install the first heat dissipation mechanism 7 on the front and back of the battery pack respectively, and place the second heat dissipation mechanism 8 between each battery group. Then install the installation box 1 on the outside of the inside of the battery pack, and the hot end of the cooler 2 is also located outside the cooler 2. Connect the liquid outlet pipe 3 and the liquid inlet pipe 4 to the coolant tank. When cooling is required, the coolant in the coolant tank is pumped by the coolant pump into the inner cavity of the liquid inlet pipe 4, and the coolant is divided into two paths through the two-way joint 5 and enters the connecting pipe 6, and then enters the U-shaped drainage groove 74 through the connecting hole 73, and the coolant flows in the inner cavity of the U-shaped drainage groove 74. When flowing, the high-temperature hot air is converted by the low-temperature coolant, and then the coolant with temperature enters the other connecting pipe 6 through pressure, and then enters the liquid outlet pipe 3 through the two-way joint 5 and returns to the coolant tank. At the same time, the heat dissipation plate 81 arranged between the battery groups absorbs the temperature between the battery packs, and the temperature can be taken away by the coolant. The first heat dissipation mechanism 7 and the heat dissipation plate 81 can dissipate heat from the surface of the battery pack and between the batteries, thus solving the problem that although the existing radiator can dissipate heat from the battery pack in the car, it can only perform heat and cold alternation on the hot air generated by the battery pack working, and then the hot air is taken away by the coolant. However, the replacement of the hot air in this way is relatively slow. In addition, it can only cool the hot air dissipated from the surface of the battery pack to maintain the working temperature of the battery pack. However, since the battery pack is composed of multiple battery groups, the temperature between each group is relatively high and not easy to dissipate, which will affect the service life of the battery.

[0043] In addition, when the coolant that takes away the temperature passes through the inner cavity of the installation box 1 through the liquid outlet pipe 3, the cooler 2 starts to operate and refrigerate to cool the coolant that takes away the temperature, making the cooling speed of the coolant faster. The recycled coolant enters the first heat dissipation mechanism 7 through the liquid inlet pipe 4 for heat dissipation.

[0044] In addition, the bolts 84 can be rotated to remove the two bolts 84. By pushing the push block 85, the sliding plate 83 is pushed to lift and lower in the inner cavity of the fixed plate 82. Through the connection of the connecting plate 812, the heat dissipation plate 81 is driven to follow and lift and lower in the inner cavity of the fixed plate 82. When the height is determined, then align the first screw hole 86 with the corresponding position, and then reinstall the bolts 84. In this way, according to the height of different battery packs, the heat dissipation plate 81 is located at the middle position between the battery packs and is applicable to different battery packs. In addition, when the heat dissipation plate 81 is placed between the battery packs, the two heat dissipation plates 81 can be automatically tensioned through the connected rubber pads 87. At the same time, the sliding block 811 will slide tightly in the inner cavity of the second chute 810, making the heat dissipation plate 81 closely fit on the inner wall in the middle of the battery pack.

[0045] In addition, in this embodiment, since the surface of the battery pack is provided with a housing and insulation prevention measures, the inner wall between the battery packs on the inner wall of the heat dissipation plate 81 will only absorb the heat energy dissipated by the battery pack through the battery pack housing. Therefore, the copper material of the heat dissipation plate 81 will not cause any impact.

[0046] Meanwhile, the content not detailedly described in this specification belongs to the well-known prior art of those skilled in the art.

[0047] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger for a new energy vehicle battery pack, comprising an installation box (1), characterized in that: The inner cavity of the installation box (1) is fixedly sleeved with a liquid outlet pipe (3) and a liquid inlet pipe (4) respectively. The opposite ends of the liquid outlet pipe (3) and the liquid inlet pipe (4) are connected to two connecting pipes (6) through a two-way joint (5). One end of each of the two connecting pipes (6) is provided with a first heat dissipation mechanism (7), and a second heat dissipation mechanism (8) is symmetrically arranged on the opposite side of the first heat dissipation mechanism (7). The first heat dissipation mechanism (7) includes a lower cover plate (71) and an upper cover plate (72). A U-shaped drainage groove (74) is fixedly formed at the top of the lower cover plate (71), and connection holes (73) are symmetrically and fixedly formed at the top of the upper cover plate (72). The second heat dissipation mechanism (8) includes two heat dissipation plates (81) and a fixing plate (82). The opposite surfaces of the two heat dissipation plates (81) are connected through two rubber pads (87). Second chutes (810) are fixedly formed at the top of the two heat dissipation plates (81). A sliding block (811) is slidably sleeved in the inner cavity of the second chute (810). A connecting plate (812) is fixedly connected to the surface of the sliding block (811). First chutes (88) are fixedly formed on the opposite surfaces of the two fixing plates (82). A sliding plate (83) is slidably sleeved in the inner cavity of the first chute (88). A plurality of second screw holes (813) are symmetrically and fixedly formed on the inner wall of the fixing plate (82). A first screw hole (86) is fixedly formed in the middle surface of the sliding plate (83). A bolt (84) is threadedly sleeved in the inner cavity of the first screw hole (86). A pushing block (85) is fixedly connected to the lower surface of the sliding plate (83).

2. The heat exchanger for a new energy vehicle battery pack according to claim 1, characterized in that: The two heat dissipation plates (81) are symmetrically and fixedly connected to the opposite surfaces of the lower cover plate (71). The top of the sliding plate (83) is flush with the port of the fixing plate (82).

3. The heat exchanger for a new energy vehicle battery pack according to claim 1, characterized in that: One end of the connecting plate (812) is fixedly connected to a slider integrally extended from the side of the sliding plate (83), and the connecting plate (812) is L-shaped.

4. The heat exchanger for a new energy vehicle battery pack according to claim 1, characterized in that: The two sides of the two heat dissipation plates (81) are attached to the opposite surfaces of the fixing plate (82), and the opposite surfaces extend outside the inner cavity of the fixing plate (82). The heat dissipation plates (81) are made of copper plates.

5. The heat exchanger for a new energy vehicle battery pack according to claim 4, characterized in that: The top of the heat dissipation plate (81) is flush with the top of the fixing plate (82), and the bottom of the heat dissipation plate (81) contacts the opposite surface of the lower cover plate (71).

6. The heat exchanger for a new energy vehicle battery pack according to claim 1, characterized in that: The first screw hole (86) is aligned with the plurality of second screw holes (813) and has the same size. One end of the bolt (84) is threadedly sleeved with the plurality of second screw holes (813).

7. The heat exchanger for a new energy vehicle battery pack according to claim 2, characterized in that: The first chute (88), the sliding plate (83), the second chute (810), and the sliding block (811) are all cross-shaped.

8. The heat exchanger for a new energy vehicle battery pack according to claim 1, characterized in that: The lower cover plate (71) and the upper cover plate (72) are covered and connected to each other, and the connection hole (73) is fixedly communicated with one end of the connecting pipe (6).

9. The heat exchanger for a new energy vehicle battery pack according to claim 1, characterized in that: A refrigerator (2) is fixedly sleeved on the surface of the liquid inlet pipe (4).

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