Heat exchange device for power battery of new energy vehicle

Abstract

The invention provides a heat exchange device for a new energy vehicle power battery, and relates to the technical field of new energy vehicle power batteries. According to the heat exchange device for the power battery of the new energy vehicle, a liquid supply pipeline, a liquid return pipeline, a battery box, a first flow guide pipeline, a second flow guide pipeline and a guide plate are designed, and cooling liquid needs to pass through the guide plate when entering the battery box through the flow guide pipelines; the guide plate with the trapezoidal structure can reduce the flow rate of the cooling liquid entering the inlet fluid of the battery box and prolong the retention time of the cooling liquid in the battery box, so that more opportunities are provided for heat exchange with the battery pack, heat generated by the battery pack is taken away, and the temperature of the battery is reduced; in addition, due to the existence of the guide plate, the cooling liquid can be fully paved in the battery box in a larger area, and the overall temperature regulation and control of the battery pack are more balanced, so that the power battery module is ensured to meet the requirement of the temperature consistency range in the operation process, and the safety of the battery energy storage system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries for new energy vehicles, and in particular to a heat exchange device for power batteries for new energy vehicles. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as a power source (or use conventional vehicle fuels and new vehicle power devices), integrate advanced technologies in vehicle power control and drive, and form vehicles with advanced technical principles, new technologies, and new structures. Power batteries are the power source for tools, mostly referring to batteries that provide power for electric vehicles, electric trains, electric bicycles, and golf carts. Power batteries are the core components of new energy vehicles. The operating temperature of power batteries and the temperature consistency between batteries have an important impact on the overall life and safe operation of the energy storage system. Air cooling or liquid cooling is required to cool the battery pack. Among them, the liquid-cooled energy storage system is a system that usually consists of a cooler, a heat exchanger, a controller, and a sensor. It cools the battery through liquid circulation. It is a system that controls the temperature of semiconductor devices within a suitable range.

[0003] However, when the existing new energy vehicle power batteries are undergoing heat exchange, the system generally adopts a design of flowing liquid supply from front to back, that is, the fluid flows into the system from the liquid inlet uniformly to cool down different parts of the equipment, and finally gathers to the liquid outlet pipe and flows out uniformly, which makes the temperature of the bottom of the module close to the liquid cooling plate drop quickly, and the temperature of the position far away from the liquid cooling plate drops slowly. The temperature of the entire module is always in an unbalanced state, thereby affecting the working performance of the entire module; at the same time, the liquid cooling plate or the serpentine heat sink is generally a flat plate structure, which can only contact with the surface part of each battery cell, which will cause the temperature of the contact part between the battery cell and the liquid cooling plate to decrease, while the temperature of the part of the battery cell that is not in direct contact with the liquid cooling plate is higher, which may cause uneven temperature distribution of the battery cell, and in severe cases may cause battery short circuit and other phenomena.

[0004] To this end, we have developed a new heat exchange device for power batteries in new energy vehicles. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a heat exchange device for a power battery of a new energy vehicle, which solves the problem that when the power battery of the existing new energy vehicle is performing heat exchange, the system generally adopts a design scheme of liquid supply flowing from front to back, that is, the fluid flows into the system uniformly from the liquid inlet to cool down different parts of the equipment, and finally gathers to the liquid outlet pipe and flows out uniformly, so that the temperature of the position near the liquid cooling plate at the bottom of the module drops quickly, and the temperature of the position far away from the liquid cooling plate drops slowly, and the temperature of the entire module is always in an unbalanced state, thereby affecting the working performance of the entire module; at the same time, the liquid cooling plate or the serpentine heat dissipation plate is generally a flat plate structure, which can only contact with the surface part of each battery cell, which will cause the temperature of the contact part between the battery cell and the liquid cooling plate to decrease, while the temperature of the part of the battery cell that is not in direct contact with the liquid cooling plate is higher, which may cause uneven temperature distribution of the battery cell, and in severe cases may cause battery short circuit and other phenomena.

[0006] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: An embodiment of the present invention provides a heat exchange device for a power battery of a new energy vehicle, comprising a battery box, the interior of the battery box is a hollow structure, a battery pack is fixedly installed inside the battery box, a plurality of grooves are provided on the front and rear sides of the outer surface of the battery pack, a first guide pipe and a second guide pipe are fixedly connected to both sides of the outer surface of the battery box, the two first guide pipes are respectively located above the corresponding second guide pipes, and one end of the two first guide pipes and the two second guide pipes are fixedly connected to a branch pipe, one end of the branch pipes connected to the two first guide pipes is fixedly connected to a three-way joint, one end of the three-way joint is fixedly connected to a liquid return pipeline, one end of the branch pipes connected to the two second guide pipes is fixedly connected to another three-way joint, and one end of the other three-way joint is fixedly connected to a liquid supply pipeline; A transfer box is installed in the middle of the outer surface of the liquid supply pipeline and the liquid return pipeline, and a condenser is fixedly installed at the ends of the liquid supply pipeline and the liquid return pipeline. A coolant pump body, a first filter and a second filter are fixedly installed between the condenser and the transfer box in sequence through the liquid supply pipeline, and a third filter is fixedly installed between the condenser and the transfer box through the liquid return pipeline. A mounting block is fixedly connected to one side of the outer surface of the adapter box, and a limiting mechanism is symmetrically installed on the side wall of the mounting block. A rotating plate is abutted against the other side of the outer surface of the adapter box, and a blocking mechanism is installed on the side where the adapter box and the rotating plate are close to each other.

[0007] Preferably, the two first flow guide pipes and the two second flow guide pipes are fixedly connected to one another on one side thereof with a plurality of guide plates, the guide plates are trapezoidal in structure, and the guide plates are fixedly connected to the interior of the battery box.

[0008] Preferably, the limiting mechanism includes a first connecting rod respectively passing through and slidably connected to the inside of the side wall of the mounting block and a fixed seat fixedly connected to the top of the outer surface of the transfer box, one end of the first connecting rod is hinged to the second connecting rod, the top of the fixed seat is hinged to a clamping claw, one end of the clamping claw abuts against the outer surface of the rotating plate, and the other end of the clamping claw is hinged to one end of the second connecting rod.

[0009] Preferably, the limiting mechanism also includes a movable plate fixedly connected to one side of the outer surface of the first connecting rod, and the opposite sides of the movable plates of the two limiting mechanisms are respectively fixedly connected with a support rod and a lifting rod, the support rod is slidably connected to the outer surface of the lifting rod, and the outer surface of the support rod is threadedly connected with a locking pin, the outer surfaces of the support rod and the lifting rod are jointly sleeved with a spring, and the two ends of the spring are respectively fixedly connected to the inner side of the corresponding movable plate.

[0010] Preferably, the side wall of the adapter box is symmetrically penetrated and fixedly connected with a first connecting pipe, and the side wall of the rotating plate is symmetrically penetrated and fixedly connected with a second connecting pipe, the first connecting pipe and the second connecting pipe correspond to each other in pairs, and the adjacent ends of each group of corresponding first connecting pipes and second connecting pipes are fixedly connected with adapters, and the opposite sides of the two corresponding adapters in each group are fixedly connected with rubber rings, and the opposite sides of the two rubber rings are tightly abutted; The other ends of the two first connecting pipes are fixedly connected to the corresponding liquid supply pipeline and liquid return pipeline respectively, and the other ends of the two second connecting pipes are fixedly connected to the corresponding liquid supply pipeline and liquid return pipeline respectively.

[0011] Preferably, the blocking mechanism comprises a blocking plate penetrating through and abutting against a side wall of the adapter, a screw rod is threadedly connected through the interior of the blocking plate, and a knob is fixedly connected to one end of the screw rod.

[0012] Preferably, the screw corresponding to the transfer box penetrates and is rotatably connected to the side wall of the transfer box, and the outer surface of the blocking plate connected to the screw is slidably connected to the side wall of the transfer box; The screw rod corresponding to the rotating plate penetrates and is rotatably connected to the side wall of the rotating plate, and the outer surface of the blocking plate connected to the screw rod is slidably connected to the side wall of the rotating plate.

[0013] Preferably, a rotating shaft is fixedly connected through the center of the side wall of the rotating plate, one end of the rotating shaft is inserted through the inside of the side wall of the adapter box, and a mounting cavity matching the rotating shaft is opened inside the side wall of the adapter box.

[0014] Preferably, the two first flow diversion pipes and the two second flow diversion pipes are fixedly installed with connectors at one end close to the branch pipe, the two first flow diversion pipes and the two second flow diversion pipes are fixedly connected to the branch pipe through corresponding connectors, and a solenoid valve is fixedly installed at one end of the multiple connectors close to the battery box.

[0015] (III) Beneficial effects The present invention provides a heat exchange device for a power battery of a new energy vehicle. It has the following beneficial effects: 1. The heat exchange device for the power battery of a new energy vehicle is designed with a liquid supply pipeline, a liquid return pipeline, a battery box, a first guide pipe, a second guide pipe and a guide plate. When the coolant enters the interior of the battery box through the guide pipe, it needs to pass through the guide plate. The guide plate with a trapezoidal structure can reduce the flow rate of the coolant entering the inlet fluid of the battery box (compared with the method of directly connecting with the battery box through the guide pipe), prolonging its residence time in the battery box, so that there are more opportunities to exchange heat with the battery pack, take away the heat generated by it, and thus reduce the temperature of the battery. At the same time, the existence of the guide plate also enables the coolant to cover a larger area of ​​the interior of the battery box, and the overall temperature control of the battery pack is more balanced, thereby ensuring that the power battery module meets the requirements of the temperature consistency range during operation, and improving the safety of the battery energy storage system.

[0016] 2. The heat exchange device for the power battery of the new energy vehicle is designed with a transfer box, a limiting mechanism and a blocking mechanism. When the outside temperature changes, the first connecting tube and the second connecting tube are blocked by controlling the blocking plate, and then the limiting of the rotating plate by the clamping claw is released and the rotating plate is rotated 180 degrees, so as to change the pipeline connected by the two groups of the first connecting tube and the second connecting tube, so that the liquid inlet pipe and the liquid outlet pipe of the battery box are replaced, which is adapted to the physical properties of the coolant itself at different temperatures. In the whole conversion process, not only will the coolant not be wasted, but also a lot of time for charging and discharging the coolant will be saved, and the operation of the battery box will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall circulation pathway of the present invention; Figure 2 It is a schematic diagram of the internal structure of the transfer box and the transfer plate of the present invention; Figure 3 A three-dimensional diagram of the transfer box and the transfer plate of the present invention; Figure 4 For the present invention Figure 2 A partial enlarged view of the middle A; Figure 5 For the present invention Figure 3 A partial enlarged view of point B in the middle; Figure 6 is a three-dimensional diagram of a battery box of the present invention; Figure 7 It is a schematic diagram of the internal structure of the battery box of the present invention; Figure 8 It is a three-dimensional diagram of the battery pack of the present invention.

[0018] Among them, 1. condenser; 2. coolant pump body; 3. first filter; 4. second filter; 5. adapter box; 6. liquid supply pipeline; 7. liquid return pipeline; 8. third filter; 9. battery box; 10. branch pipe; 11. solenoid valve; 12. first connecting pipe; 13. second connecting pipe; 14. mounting block; 15. first connecting rod; 16. second connecting rod; 17. fixing seat; 18. clamping claw; 19. rotating plate; 20. rotating shaft; 21. mounting cavity; 22. adapter; 23. rubber ring; 24. sealing plate; 25. screw; 26. knob; 27. movable plate; 28. support rod; 29. ​​lifting rod; 30. spring; 31. locking pin; 32. battery pack; 33. first diversion pipe; 34. second diversion pipe; 35. guide plate; 36. three-way joint; 37. connector; 38. groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Examples, such as Figure 1 - Figure 8 As shown, an embodiment of the present invention provides a heat exchange device for a power battery of a new energy vehicle, including a battery box 9, the interior of the battery box 9 is a hollow structure, a battery pack 32 is fixedly installed inside the battery box 9, and a plurality of grooves 38 are provided on the front and rear sides of the outer surface of the battery pack 32, and a first guide pipe 33 and a second guide pipe 34 are fixedly connected to both sides of the outer surface of the battery box 9, respectively, and the two first guide pipes 33 are respectively located above the corresponding second guide pipes 34, and the two first guide pipes 33 and the two second guide pipes 34 are fixedly connected to the opposite side thereof with a plurality of guide plates 35, the guide plates 35 are trapezoidal in structure, and the guide plates 35 are fixedly connected to the interior of the battery box 9; The contact area between the guide plate 35 and the battery box 9 is different at different positions. For example, the cross-sectional area of ​​the guide plate 35 is smaller at a position closer to the guide pipe, and is larger at a position farther from the guide pipe. When the coolant enters the inner side of the guide plate 35 through the guide pipe, it flows into the battery box 9. The guide plate 35 with a trapezoidal structure can reduce the flow rate of the coolant entering the inlet fluid of the battery box 9 (compared with the method of directly connecting with the battery box 9 through the guide pipe), prolonging the time it stays in the battery box 9, thereby having more opportunities to exchange heat with the battery pack 32, taking away the heat generated by it, and thus reducing the temperature of the battery. At the same time, the existence of the guide plate 35 also allows the coolant to cover a larger area of ​​the interior of the battery box 9, and the overall temperature control of the battery pack 32 is more balanced. At the same time, one end of the two first flow guiding pipes 33 and the two second flow guiding pipes 34 are fixedly connected to the branch pipe 10, one end of the branch pipe 10 connected to the two first flow guiding pipes 33 is commonly fixedly connected to a three-way joint 36, one end of the three-way joint 36 is fixedly connected to the return liquid pipeline 7, and one end of the branch pipe 10 connected to the two second flow guiding pipes 34 is commonly fixedly connected to another three-way joint 36, one end of the other three-way joint 36 is fixedly connected to the liquid supply pipeline 6; The circulation path uses coolant as the cooling medium. The coolant can both heat and cool. This is because the coolant plays a dual role in the temperature control system of the automotive power battery: the role of the coolant in the power battery is to regulate the temperature of the battery through circulation. When the battery temperature is too high, the coolant absorbs the heat generated by the battery and dissipates the heat to the environment through the heat exchanger, thereby reducing the battery temperature. On the contrary, when the battery temperature is too low, the coolant can increase the battery temperature through the heating system to ensure that the battery operates within a suitable temperature range.

[0021] Specifically, a transfer box 5 is installed in the middle of the outer surface of the liquid supply pipeline 6 and the liquid return pipeline 7, and a condenser 1 is fixedly installed at the ends of the liquid supply pipeline 6 and the liquid return pipeline 7. A coolant pump body 2, a first filter 3, and a second filter 4 are fixedly installed between the condenser 1 and the transfer box 5 in sequence through the liquid supply pipeline 6. A third filter 8 is fixedly installed between the condenser 1 and the transfer box 5 through the liquid return pipeline 7. The first filter 3 and the second filter 4 can filter the coolant during liquid supply, and the third filter 8 can filter the used coolant. Among them, the second filter 4 should use a filter mesh model with higher precision than the first filter 3 to achieve the function of further filtering out impurities (the difference between coarse filtration and fine filtration); A mounting block 14 is fixedly connected to one side of the outer surface of the adapter box 5, and a limiting mechanism is symmetrically installed on the side wall of the mounting block 14. A rotating plate 19 is abutted against the other side of the outer surface of the adapter box 5, and a blocking mechanism is installed on the side where the adapter box 5 and the rotating plate 19 are close to each other.

[0022] Among them, the side wall of the adapter box 5 is symmetrically penetrated and fixedly connected with the first connecting pipe 12, and the side wall of the rotating plate 19 is symmetrically penetrated and fixedly connected with the second connecting pipe 13. The first connecting pipe 12 and the second connecting pipe 13 correspond to each other, and the ends of each group of corresponding first connecting pipes 12 and second connecting pipes 13 close to each other are fixedly connected with adapters 22, and the opposite sides of the two corresponding adapters 22 in each group are fixedly connected with rubber rings 23, and the opposite sides of the two rubber rings 23 are tightly abutted, so as to achieve a sealing effect, so that the first connecting pipe 12 and the second connecting pipe 13 can be connected to each other, which is convenient for the flow of coolant; The other ends of the two first connecting pipes 12 are fixedly connected to the corresponding liquid supply pipeline 6 and liquid return pipeline 7, and the other ends of the two second connecting pipes 13 are fixedly connected to the corresponding liquid supply pipeline 6 and liquid return pipeline 7, forming a closed circulation loop.

[0023] The limiting mechanism includes a first connecting rod 15 which is respectively slidably connected to the inside of the side wall of the mounting block 14 and a fixing seat 17 which is fixedly connected to the top of the outer surface of the transfer box 5. One end of the first connecting rod 15 is hinged to the second connecting rod 16. The top of the fixing seat 17 is hinged to a clamping claw 18. One end of the clamping claw 18 abuts against the outer surface of the rotating plate 19, and the other end of the clamping claw 18 is hinged to one end of the second connecting rod 16. By controlling whether the clamping claw 18 abuts against the outer surface of the rotating plate 19, whether the rotating plate 19 is installed in place can be controlled, thereby controlling whether the first connecting pipe 12 is connected to the second connecting pipe 13. At the same time, the limiting mechanism also includes a movable plate 27 fixedly connected to one side of the outer surface of the first connecting rod 15, and the opposite sides of the movable plates 27 of the two limiting mechanisms are respectively fixedly connected with a support rod 28 and a lifting rod 29, and the support rod 28 is sleeved and slidably connected to the outer surface of the lifting rod 29, and the outer surface of the support rod 28 is threadedly connected with a locking pin 31, and the position of the support rod 28 relative to the lifting rod 29 can be shortened by locking the locking pin 31, so that the distance between the two movable plates 27 cannot be changed, and the outer surfaces of the support rod 28 and the lifting rod 29 are jointly sleeved with a spring 30, and the two ends of the spring 30 are respectively fixedly connected to the inner side of the corresponding movable plate 27. When the locking pin 31 is not tightened, the distance between the two movable plates 27 can be shortened and brought closer to each other by pushing the two movable plates 27 to squeeze the spring 30, or the distance between the two movable plates 27 can be increased and moved away from each other by prying the two movable plates 27 apart; Correspondingly, the change in the distance between the two movable plates 27 represents the difference in the driving force of the first connecting rod 15 pushing the second connecting rod 16, so that the second connecting rod 16 and the clamping claw 18 will be in different states, controlling whether the rotating plate 19 abuts against the adapter box 5.

[0024] The sealing mechanism includes a sealing plate 24 that passes through and abuts against the side wall of the adapter 22, and a screw 25 is threadedly connected inside the sealing plate 24, and one end of the screw 25 is fixedly connected to a knob 26. Accordingly, the screw 25 corresponding to the adapter box 5 passes through and is rotatably connected to the side wall of the adapter box 5, and the outer surface of the sealing plate 24 connected by the screw 25 is slidably connected to the side wall of the adapter box 5; and the screw 25 corresponding to the rotating plate 19 passes through and is rotatably connected to the side wall of the rotating plate 19, and the outer surface of the sealing plate 24 connected by the screw 25 is slidably connected to the side wall of the rotating plate 19. By turning the knob 26, the screw 25 follows the rotation of the knob 26, which will cause the sealing plate 24 on its outer surface to slide along the side wall of the corresponding adapter box 5 or the rotating plate 19, thereby being inserted into the interior of the adapter 22, blocking the first connecting pipe 12 or the second connecting pipe 13, and the coolant will no longer flow.

[0025] A rotating shaft 20 is fixedly connected to the center of the side wall of the rotating plate 19, and one end of the rotating shaft 20 is inserted into the side wall of the adapter box 5, and an installation cavity 21 matching the rotating shaft 20 is opened inside the side wall of the adapter box 5. By pulling the rotating shaft 20 outward for a certain distance, the rotating plate 19 and the adapter box 5 can be separated, that is, the connection between the first connecting tube 12 and the second connecting tube 13 can be separated, and then the rotating shaft 20 can be rotated half a circle (180°) to interchange the two sets of the first connecting tube 12 and the second connecting tube 13, and then the rotating shaft 20 can be reinserted into the installation cavity 21, thereby preliminarily completing the replacement of the entire coolant flow circuit.

[0026] The two first flow guide pipes 33 and the two second flow guide pipes 34 are fixedly installed with connectors 37 at one end close to the branch pipe 10. The two first flow guide pipes 33 and the two second flow guide pipes 34 are fixedly connected to the branch pipe 10 through the corresponding connectors 37, and the multiple connectors 37 are fixedly installed with solenoid valves 11 at one end close to the battery box 9. The solenoid valves can control whether the branch pipe 10 is connected to the inside of the battery box 9, thereby facilitating the subsequent replacement of the coolant and changing the flow circuit of the entire coolant.

[0027] A heat exchange device for a power battery of a new energy vehicle is used: the entire circulation passage uses coolant as a cooling medium, and the coolant can be heated and cooled. This is because the coolant plays a dual role in the temperature control system of the automotive power battery: the role of the coolant in the power battery is to regulate the temperature of the battery through a circulating flow, and the coolant needs to pass through a guide plate 35 when entering the interior of the battery box 9 through a guide pipe. The guide plate 35 of the trapezoidal structure can reduce the flow rate of the coolant entering the inlet fluid of the battery box 9 (compared to the method of directly connecting with the battery box through the guide pipe), prolonging its residence time in the battery box 9, so that there are more opportunities to exchange heat with the battery pack 32, take away the heat generated by it, and thus reduce the temperature of the battery. At the same time, the existence of the guide plate 35 also allows the coolant to cover a larger area of ​​the interior of the battery box 9, and the overall temperature control of the battery pack 32 is more balanced, thereby ensuring that the power battery module meets the requirements of the temperature consistency range during operation, and improving the safety of the battery energy storage system; Furthermore, the density of hot liquid and cold liquid is different, because temperature changes will affect the arrangement and movement state of water molecules. For example, when the temperature of common water molecules rises, the tetrahedral structure of water molecules is destroyed, the distance between molecules increases, and the density decreases; when the temperature decreases, the hydrogen bonding effect between molecules is enhanced, so that the density increases. The same is true for the coolant. With the different temperatures of the coolant itself (controlled by the condenser 1), the control requirements of the power battery under different conditions are met. For example, when the temperature is low in winter, the coolant is hot to prevent the power battery from freezing. Under the above conditions, the hot coolant tends to be at the top of the battery box 9 due to its own density characteristics. At this time, if the coolant is introduced from the bottom of the battery box 9, the overall effect is better (just as the cold coolant tends to be at the bottom of the battery box 9, and the effect of introducing the coolant from the top of the battery box 9 is better at this time); To deal with this situation, the adapter box 5 can be used to replace the connection of the liquid supply pipeline 6 and the liquid return pipeline 7 at both ends, so as to change the actual liquid inlet path of the battery box 9, and the first connecting tube 12 and the second connecting tube 13 are blocked by controlling the sealing plate 24, and then the limit of the rotating plate 19 by the clamping jaw 18 is released and the rotating plate 19 is rotated 180°, so as to change the pipeline connected by the two groups of first connecting tubes 12 and second connecting tubes 13, so that the liquid inlet pipeline and liquid outlet pipeline of the battery box 9 are replaced to adapt to the physical properties of the coolant itself at different temperatures. In the whole conversion process, not only will the coolant not be wasted, but also a lot of time for charging and discharging the coolant will be saved, and it will not affect the operation of the battery box 9.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat exchange device for a power battery of a new energy vehicle, comprising a battery box (9), characterized in that: The battery box (9) has a hollow structure inside, a battery pack (32) is fixedly installed inside the battery box (9), a plurality of grooves (38) are provided on the front and rear sides of the outer surface of the battery pack (32), a first flow guide pipe (33) and a second flow guide pipe (34) are respectively fixedly connected to both sides of the outer surface of the battery box (9), the two first flow guide pipes (33) are respectively located above the corresponding second flow guide pipes (34), and one end of the two first flow guide pipes (33) and the two second flow guide pipes (34) are both fixedly connected to a branch pipe (10), one end of the branch pipes (10) connected to the two first flow guide pipes (33) is commonly fixedly connected to a three-way joint (36), one end of the three-way joint (36) is fixedly connected to a liquid return pipeline (7), one end of the branch pipes (10) connected to the two second flow guide pipes (34) is commonly fixedly connected to another three-way joint (36), and one end of the other three-way joint (36) is fixedly connected to a liquid supply pipeline (6); A transfer box (5) is installed in the middle of the outer surfaces of the liquid supply pipeline (6) and the liquid return pipeline (7), and a condenser (1) is fixedly installed at the ends of the liquid supply pipeline (6) and the liquid return pipeline (7); a coolant pump body (2), a first filter (3) and a second filter (4) are fixedly installed between the condenser (1) and the transfer box (5) in sequence through the liquid supply pipeline (6); and a third filter (8) is fixedly installed between the condenser (1) and the transfer box (5) through the liquid return pipeline (7); A mounting block (14) is fixedly connected to one side of the outer surface of the adapter box (5); a limiting mechanism is symmetrically mounted on the side wall of the mounting block (14); a rotating plate (19) is abutted against the other side of the outer surface of the adapter box (5); and a blocking mechanism is mounted on the side where the adapter box (5) and the rotating plate (19) are close to each other.

2. A heat exchange device for a power battery of a new energy vehicle according to claim 1, characterized in that: A plurality of guide plates (35) are fixedly connected to opposite sides of the two first flow guide pipes (33) and the two second flow guide pipes (34); the guide plates (35) are of a trapezoidal structure, and the guide plates (35) are fixedly connected to the interior of the battery box (9).

3. A heat exchange device for a power battery of a new energy vehicle according to claim 2, characterized in that: The limiting mechanism comprises a first connecting rod (15) respectively penetrating and slidably connected to the inside of the side wall of the mounting block (14) and a fixing seat (17) fixedly connected to the top of the outer surface of the transfer box (5), one end of the first connecting rod (15) is hinged to the second connecting rod (16), the top of the fixing seat (17) is hinged to a clamping claw (18), one end of the clamping claw (18) abuts against the outer surface of the rotating plate (19), and the other end of the clamping claw (18) is hinged to one end of the second connecting rod (16).

4. A heat exchange device for a power battery of a new energy vehicle according to claim 3, characterized in that: The limiting mechanism further comprises a movable plate (27) fixedly connected to one side of the outer surface of the first connecting rod (15); opposite sides of the movable plates (27) of the two limiting mechanisms are respectively fixedly connected to a support rod (28) and a lifting rod (29); the support rod (28) is sleeved and slidably connected to the outer surface of the lifting rod (29); a locking pin (31) is threadedly connected through the outer surface of the support rod (28); a spring (30) is sleeved on the outer surfaces of the support rod (28) and the lifting rod (29); two ends of the spring (30) are respectively fixedly connected to the inner side of the corresponding movable plate (27).

5. A heat exchange device for a power battery of a new energy vehicle according to claim 4, characterized in that: The side wall of the adapter box (5) is symmetrically penetrated and fixedly connected with a first connecting pipe (12), and the side wall of the rotating plate (19) is symmetrically penetrated and fixedly connected with a second connecting pipe (13), the first connecting pipe (12) and the second connecting pipe (13) correspond to each other in pairs, and the adjacent ends of each group of corresponding first connecting pipes (12) and second connecting pipes (13) are fixedly connected with an adapter (22), and the opposite sides of the two corresponding adapters (22) in each group are fixedly connected with a rubber ring (23), and the opposite sides of the two rubber rings (23) are tightly abutted; The other ends of the two first connecting pipes (12) are respectively fixedly connected to the corresponding liquid supply pipeline (6) and the liquid return pipeline (7), and the other ends of the two second connecting pipes (13) are respectively fixedly connected to the corresponding liquid supply pipeline (6) and the liquid return pipeline (7).

6. A heat exchange device for a power battery of a new energy vehicle according to claim 5, characterized in that: The blocking mechanism comprises a blocking plate (24) penetrating and abutting against a side wall of the adapter (22); a screw rod (25) is threadedly connected to the interior of the blocking plate (24); and a knob (26) is fixedly connected to one end of the screw rod (25).

7. A heat exchange device for a power battery of a new energy vehicle according to claim 6, characterized in that: The screw rod (25) corresponding to the transfer box (5) penetrates and is rotatably connected to the side wall of the transfer box (5), and the outer surface of the blocking plate (24) connected to the screw rod (25) is slidably connected to the side wall of the transfer box (5); The screw rod (25) corresponding to the rotating plate (19) penetrates and is rotatably connected to the side wall of the rotating plate (19), and the outer surface of the blocking plate (24) connected to the screw rod (25) is slidably connected to the side wall of the rotating plate (19).

8. A heat exchange device for a power battery of a new energy vehicle according to claim 7, characterized in that: A rotating shaft (20) is fixedly connected to the center of the side wall of the rotating plate (19), one end of the rotating shaft (20) is inserted into the inside of the side wall of the adapter box (5), and a mounting cavity (21) matching the rotating shaft (20) is provided inside the side wall of the adapter box (5).

9. A heat exchange device for a power battery of a new energy vehicle according to claim 8, characterized in that: A connector (37) is fixedly mounted on one end of the two first flow guide pipes (33) and the two second flow guide pipes (34) close to the branch pipe (10); the two first flow guide pipes (33) and the two second flow guide pipes (34) are fixedly connected to the branch pipe (10) via corresponding connectors (37), and a solenoid valve (11) is fixedly mounted on one end of the plurality of connectors (37) close to the battery box (9).

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