A new energy vehicle battery pack cooling device

Abstract

The present invention relates to the field of battery cooling technology, and discloses a battery pack cooling device for a new energy power vehicle, comprising a battery pack housing, both ends of the battery pack housing are fixedly provided with mounting bars near the lower side, a battery partition frame is fixedly provided on the inner side of the battery pack housing, a plurality of battery blocks are installed on the inner side of the battery partition frame, a main cooling assembly is provided on the inner bottom and both ends of the battery pack housing, a plurality of auxiliary cooling assemblies are provided on the battery partition frame and the upper ends of the plurality of battery blocks, and the main cooling assembly includes a plurality of liquid cooling plates provided between the battery partition frame intervals at the inner bottom of the battery pack housing. The battery pack cooling device for a new energy power vehicle described in the present invention realizes the switching of the coolant inlet and outlet ends through the coordinated use of the whole, improves the temperature difference of the coolant inlet and outlet ends, and a plurality of heat sinks provided on the two groups of guide shells cool the coolant after absorbing heat.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cooling, and in particular to a battery pack cooling device for a new energy powered vehicle. Background Art

[0002] ‌New energy vehicle power battery packs are mainly composed of battery cells, modules, battery packs, battery management systems (BMS) and auxiliary components. During the discharge and charging process of the battery pack, heating problems will occur. Multiple single-cell batteries stacked together will cause heat accumulation, affecting battery performance and life. In traditional battery packs, cooling is achieved through a whole liquid cooling plate. When the coolant in the liquid cooling plate flows from one end of the pipe to the other, the coolant first enters from one end of the pipe, where the temperature is relatively low and can effectively absorb the heat generated by the battery; as the coolant flows, the heat it carries continues to increase, and the temperature gradually rises; when the coolant flows to the other end of the pipe, its temperature has risen, and the heat absorption effect will decrease compared to the initial stage, resulting in poor heat absorption of the local battery on the outlet side. Summary of the invention

[0003] The main purpose of the present invention is to provide a new energy power vehicle battery pack cooling device, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A new energy power vehicle battery pack cooling device comprises a battery pack shell, both ends of the battery pack shell are fixedly provided with mounting strips near the lower side, a battery partition frame is fixedly provided on the inner side of the battery pack shell, a plurality of battery blocks are installed on the inner side of the battery partition frame, a main cooling assembly is provided on the inner bottom and both ends of the battery pack shell, a plurality of auxiliary cooling assemblies are provided on the battery partition frame and the upper ends of the plurality of battery blocks, the main cooling assembly comprises a plurality of liquid cooling plates 1 arranged between the battery partition frames at the inner bottom of the battery pack shell, two groups of circulation grooves 1 are provided on the inner side of the liquid cooling plate 1, a positioning plate is fixedly provided on the liquid cooling plate 1, positioning water pipes are fixedly provided on one side of the liquid cooling plate 1 corresponding to the interface positions of the four groups of circulation grooves 1, a cylinder is fixedly provided on one end of the four groups of positioning water pipes, and the cylinder Four groups of connecting heads are fixedly provided on the upper and lower sides of the cylinder, guide shells are respectively provided on the upper and lower sides of the cylinder, a plurality of groups of heat sinks are fixedly provided inside the opposite sides of the two groups of guide shells, liquid cooling pipes are fixedly installed on the front ends of the two groups of heat sinks, a connecting rod is provided near the middle on the inner side of the cylinder, a switching head one is fixedly provided on the front and rear ends of the two groups of connecting rods, a guide groove one is provided on the inner side of the switching head one, a gear ring one is fixedly provided on the front end of the switching head one, a cross is fixedly provided on the inner side of the cylinder near the front side of the gear ring one, four groups of gears are rotatably provided on the cross, a gear ring two is movably provided on the front side of the four groups of gears, a switching head two is fixedly provided on the front end of the gear ring two, a guide groove two is provided on the inner side of the switching head two, and a motor is fixedly provided on the upper end of the mounting bar at the position corresponding to the switching head two.

[0006] Preferably, the auxiliary cooling assembly includes several groups of fixing bolts threadedly arranged on the upper end of the battery partition frame near the middle position, a push block is fixedly arranged on the outer side of the fixing bolt, and fixing nails are fixedly arranged on both sides of the upper end of the battery partition frame near the fixing bolt, the outer sides of the two groups of the fixing nails are sleeved with sleeve rods, and the inner sides of the sleeve rods are provided with movable openings, a liquid cooling plate 2 is fixedly arranged at one end of the sleeve rod, a protrusion is fixedly arranged at the middle arc-shaped inner wall position of the liquid cooling plate 2, the upper ends of the two groups of the liquid cooling plates 2 are fixedly arranged with fixing blocks, a spring is fixedly arranged between the two groups of the fixing blocks, the inner sides of the two groups of the liquid cooling plates 2 are provided with circulation grooves 2, and two groups of connecting pipes are fixedly arranged at one end of the two groups of the liquid cooling plates 2 corresponding to the opening position of the circulation grooves 2.

[0007] Preferably, two groups of fixing frames are fixedly provided at the opposite ends of the two groups of liquid cooling plates corresponding to the positions of the positive and negative pole ears of the battery block, a sliding sleeve is fixedly provided on one side of the two groups of fixing frames, a heat conducting plate is slidably provided on the inner side of the two groups of sliding sleeves, two groups of rubber sleeves are fixedly provided at one end of the heat conducting plate, two groups of flow guide tubes are fixedly provided on the inner side of the two groups of rubber sleeves, a fixing ring is fixedly provided on the outer side of the positive and negative pole ears at the upper end of the battery block, two groups of guide seats are fixedly provided on the side of the upper end of the fixing ring away from the heat conducting plate, and an L-shaped seat is fixedly provided on the side of the upper end of the fixing ring close to the heat conducting plate.

[0008] Preferably, the positioning plate is fixedly installed on the inner side of the battery pack shell, the positioning water pipe is communicated with the circulation tank 1 and the interior of the cylinder, several groups of switching heads 2 in the cylinder are fixedly connected to each other through round rods, one group on the lower side of the two groups of guide shells is fixedly connected to four groups of connecting heads arranged on the lower side of the cylinder and are communicated internally, and the two groups of liquid cooling pipes are connected to an external coolant pump.

[0009] Preferably, the switching head 1, the switching head 2 and the cylinder are rotatably arranged, one side and the upper opening of the two groups of guide grooves 1 respectively correspond to the middle two groups of four groups of positioning water pipes and connecting heads, the four groups of gears are respectively meshed with the two groups of gear rings 2, one side and the lower opening of the two groups of guide grooves 2 respectively correspond to the other two groups of four groups of positioning water pipes and connecting heads, and the motor rotating shaft is fixedly connected to the switching head 2 on the front side.

[0010] Preferably, the lower side of the push block is arranged between the two groups of protrusions, the fixing nail and the sleeve rod are slidingly arranged, and the two groups of liquid cooling plates are mirror-symmetrically arranged.

[0011] Preferably, the upper sides of the four groups of connecting pipes pass through the battery pack shell and are fixedly connected to the circulation groove 2 in the liquid cooling plate 2, and the middle two groups of the four groups of connecting pipes are connected to the two groups of guide shells on both sides respectively.

[0012] Preferably, the distance between the two groups of fixing frames is greater than the diameter of the battery block pole ear, the heat conductive sheet is made of elastic metal material, and the two groups of flow guide pipes are fixedly connected to the second liquid cooling plate and communicate with the second internal circulation tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The cooling liquid is drawn from the upper liquid cooling pipe into the upper guide shell through an external cooling liquid pump. The cooling liquid is respectively introduced into the inner side of the two sets of switching heads 1 in the cylinder by the upper guide shell and the connector, and respectively introduced into the middle two sets of the four sets of positioning water pipes through the corresponding two sets of guide grooves 1, and enters the circulation groove 1 arranged on the inner side of the liquid cooling plate 1. The cooling liquid flows from the inside to the outside in the circulation groove 1, and is discharged into the guide groove 2 arranged on the inner side of the two sets of switching heads 2, and then enters the two sets of connecting heads and the lower guide shell that are connected on the lower side, and is discharged to the outside by another set of liquid cooling pipes, thereby realizing the overall circulation flow of the cooling liquid. At the same time, the traditional liquid cooling plate 1 is divided into several plates, the internal circulation flow distance is reduced, and the temperature difference of the cooling liquid when entering and discharging at one end is avoided, so that several sets of liquid cooling plates 1 can better cool the battery blocks.

[0015] The switching head 2 connected by the motor drive performs intermittent rotation of 90 degrees forward and reverse. When the switching head 2 rotates clockwise, the gear meshing setting will drive the switching head 1 to rotate counterclockwise. The openings on both sides of the two sets of guide grooves 2 will remain connected to the positioning water pipe on one side while switching to connect with the two sets of connecting heads on the upper side, and the opening of the lower connecting head will be blocked. Similarly, the guide groove 1 on the switching head 1 remains connected to the positioning water pipe on one side while disconnecting the connection with the two sets of connecting heads on the upper side and connecting with the corresponding two sets of connecting heads on the lower side. At this time, the entering coolant is introduced into the circulation groove 1 inside the liquid cooling plate 1 through the two sets of guide grooves 2 and the positioning water pipe. The coolant moves from the outside to the inside to realize the switching of the coolant inlet and outlet ends. The intermittent drive of the motor is used to realize the switching of the coolant inlet and outlet modes, which better improves the temperature difference between the inlet and outlet ends of the coolant, and the several sets of heat sinks arranged on the two sets of guide shells dissipate heat and cool the coolant after absorbing heat.

[0016] The push block is fixed on the upper end of the battery partition frame by rotating the fixing bolt, and the rotating push block will push the protrusions on both sides and the second liquid cooling plate to slide outward along the two sets of fixing nails, stretching the spring. At the same time, the second liquid cooling plate will push the heat conductive sheet close to the position of the battery block ear to absorb the heat emitted by the ear. When the battery is subsequently disassembled, the fixing bolt is rotated in the opposite direction, and the spring will pull the two sets of second liquid cooling plates together to avoid blocking the installation or removal of the battery block.

[0017] When the liquid cooling plate 2 pushes the heat conducting sheet toward the battery block pole ear, it will first contact with the L-shaped seat, causing the heat conducting sheet to bend into an arc shape. The two ends of the heat conducting sheet will be guided by the two sets of guide seats to surround the outside of the pole ear as it moves continuously, getting closer to it for heat absorption. With the connection of four sets of connecting pipes, the coolant passes through the guide shell and enters the liquid cooling plate 2 and the guide pipe. The liquid cooling plate 2 absorbs heat and cools the space on the upper side of the battery block, and several sets of heat conducting sheets cooperate with the coolant inside the guide pipe to absorb heat from the pole ear where the battery block heats up the most, thereby achieving a better overall cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the partial internal structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the main cooling assembly of the present invention;

[0021] Figure 4 The schematic diagram of the partial unfolding structure of the main cooling assembly of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 5 It is a schematic diagram of the partial internal structure of the main cooling assembly of the present invention;

[0023] Figure 6 The schematic diagram of the partial unfolding structure of the main cooling assembly of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 7 It is a schematic diagram of the structure of the auxiliary cooling assembly of the present invention;

[0025] Figure 8 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0026] Fig. 9 It is a schematic diagram of a partial cross-section structure of the auxiliary cooling assembly of the present invention;

[0027] Fig.10 It is a schematic diagram of the local structure of the auxiliary cooling component of the present invention.

[0028] In the figure: 1. battery pack housing; 2. mounting bar; 3. battery partition rack; 4. battery block; 5. main cooling assembly; 51. liquid cooling plate 1; 52. circulation tank 1; 53. positioning plate; 54. positioning water pipe; 55. cylinder; 56. connector; 57. guide shell; 58. heat sink; 59. liquid cooling pipe; 510. connecting rod; 511. switching head 1; 512. guide tank 1; 513. gear ring 1; 514. cross; 515. gear; 516. gear ring 2; 517. cutter Head changer 2; 518, guide groove 2; 519, motor; 6, auxiliary cooling assembly; 61, fixing bolt; 62, push block; 63, fixing nail; 64, sleeve rod; 65, movable opening; 66, liquid cooling plate 2; 67, bump; 68, fixing block; 69, spring; 610, circulation groove 2; 611, connecting pipe; 612, fixing frame; 613, sliding sleeve; 614, heat conducting plate; 615, rubber sleeve; 616, guide pipe; 617, fixing ring; 618, guide seat; 619, L-shaped seat. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are relative relationships of directions or positions, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] See also Figure 1-10 An embodiment of the present invention is as follows: a battery pack cooling device for a new energy power vehicle comprises a battery pack shell 1, mounting strips 2 are fixedly arranged at both ends of the battery pack shell 1 near the lower side, a battery partition frame 3 is fixedly arranged on the inner side of the battery pack shell 1, a plurality of battery blocks 4 are installed on the inner side of the battery partition frame 3, a main cooling assembly 5 is arranged at the inner bottom and both ends of the battery pack shell 1, a plurality of auxiliary cooling assemblies 6 are arranged at the upper ends of the battery partition frame 3 and the plurality of battery blocks 4, the main cooling assembly 5 comprises a plurality of liquid cooling plates 51 arranged between the battery partition frame 3 at the inner bottom of the battery pack shell 1, two groups of circulation grooves 52 are arranged on the inner side of the liquid cooling plate 51, a positioning plate 53 is fixedly arranged on the liquid cooling plate 51, and a positioning water pipe 54 is fixedly installed at one side of the liquid cooling plate 51 corresponding to the interface positions of the four groups of circulation grooves 52, a cylinder 55 is fixedly arranged at one end of the four groups of positioning water pipes 54, and four A connecting head 56 is provided, and a guide shell 57 is provided on the upper and lower sides of the cylinder 55 respectively. A plurality of heat sinks 58 are fixedly provided inside the two sets of guide shells 57 on the opposite sides. Liquid cooling pipes 59 are fixedly installed at the front ends of the two sets of heat sinks 58. A connecting rod 510 is provided near the middle of the inner side of the cylinder 55. A switching head 511 is fixedly provided at the front and rear ends of the two sets of connecting rods 510. A guide groove 512 is provided on the inner side of the switching head 511. The front end of the switching head 511 is fixedly provided with a guide groove 512. A gear ring 1 513 is fixedly provided, a cross 514 is fixedly provided on the inner side of the cylinder 55 near the front side of the gear ring 1 513, four sets of gears 515 are rotatably provided on the cross 514, a gear ring 2 516 is movably provided on the front side of the four sets of gears 515, a switching head 2 517 is fixedly provided at the front end of the gear ring 2 516, a guide groove 2 518 is provided on the inner side of the switching head 2 517, and a motor 519 is fixedly provided at the upper end of the mounting strip 2 corresponding to the position of the switching head 2 517.

[0032] The positioning plate 53 is fixedly installed on the inner side of the battery pack shell 1, the positioning water pipe 54 is communicated with the circulation groove 1 52 and the interior of the cylinder 55, the switching head 2 517 in the several groups of cylinders 55 are fixedly connected to each other through round rods, one group on the lower side of the two groups of guide shells 57 is fixedly connected to the four groups of connecting heads 56 arranged on the lower side of the cylinder 55 and the interior is communicated, the two groups of liquid cooling pipes 59 are connected to the external coolant pump, the switching head 1 511 and the switching head 2 517 are rotatably arranged with the cylinder 55, one side and the upper side opening of the two groups of guide grooves 1 512 respectively correspond to the middle two groups of the four groups of positioning water pipes 54 and the connecting heads 56, the four groups of gears 515 are respectively meshed with the two groups of gear rings 2 516, one side and the lower side opening of the two groups of guide grooves 2 518 respectively correspond to the other two groups of the four groups of positioning water pipes 54 and the connecting heads 56, and the rotating shaft of the motor 519 is fixedly connected to the switching head 2 517 on the front side.

[0033] The cooling liquid is pumped from the upper liquid cooling pipe 59 into the upper guide shell 57 through an external cooling liquid pump. The cooling liquid is respectively introduced into the inner sides of the two sets of switching heads 511 in the cylinder 55 by the upper guide shell 57 and the connecting head 56. The cooling liquid is respectively introduced into the middle two sets of the four sets of positioning water pipes 54 through the corresponding two sets of guide grooves 512, and enters the circulation groove 52 set inside the liquid cooling plate 51. The cooling liquid is discharged from the inside to the outside in the circulation groove 52 into the guide grooves 512 set inside the two sets of switching heads 517. 8, and then enters the two sets of connecting heads 56 and the lower guide shell 57 that are connected at the lower side, and is discharged to the outside by another set of liquid cooling pipes 59, so as to realize the overall circulation flow of the coolant. At the same time, the traditional liquid cooling plate 1 51 is divided into several plates, so as to reduce the internal circulation flow distance, avoid the temperature difference of the coolant when entering and discharging at one end, and enable several sets of liquid cooling plates 1 51 to cool the battery block 4 better; and the switching head 2 517 connected by the motor 519 drives the forward and reverse intermittent rotation of 90 degrees When the switching head 2 517 rotates clockwise, the meshing setting of the gear 515 drives the switching head 1 511 to rotate counterclockwise, and the openings on both sides of the two groups of guide grooves 2 518 will remain connected to the positioning water pipe 54 on one side while switching to communicate with the two groups of connectors 56 on the upper side, and the openings of the lower connectors 56 will be blocked. Similarly, the guide groove 1 512 on the switching head 1 511 remains connected to the positioning water pipe 54 on one side while disconnecting from the two groups of connectors 56 on the upper side. The two corresponding groups of connectors 56 on the lower side are connected. At this time, the incoming coolant is introduced into the circulation groove 52 inside the liquid cooling plate 51 through the two groups of guide grooves 518 and the positioning water pipe 54. The coolant moves from the outside to the inside to realize the switching of the coolant inlet and outlet ends. The intermittent drive of the motor 519 is used to realize the switching of the coolant inlet and outlet modes, which better improves the temperature difference between the coolant inlet and outlet ends. The several groups of heat sinks 58 arranged on the two groups of guide shells 57 dissipate heat and cool the coolant after absorbing heat.

[0034] The auxiliary cooling assembly 6 includes a plurality of groups of fixing bolts 61 threadedly arranged near the middle position of the upper end of the battery partition frame 3, a push block 62 is fixedly arranged on the outer side of the fixing bolt 61, and fixing nails 63 are fixedly arranged on both sides of the upper end of the battery partition frame 3 near the fixing bolt 61, and the outer sides of the two groups of fixing nails 63 are sleeved with sleeve rods 64, and the inner sides of the sleeve rods 64 are provided with movable openings 65, and one end of the sleeve rod 64 is fixedly provided with a liquid cooling plate 66, and a protrusion 67 is fixedly provided at the middle arc-shaped inner wall position of the liquid cooling plate 66, and the upper ends of the two groups of liquid cooling plates 66 are fixedly provided with fixing blocks 68, and a spring 69 is fixedly provided between the two groups of fixing blocks 68, and the inner sides of the two groups of liquid cooling plates 66 are provided with circulation grooves 610, and one end of the two groups of liquid cooling plates 66 corresponds to the circulation groove Two groups of connecting pipes 611 are fixedly provided at the opening positions of the two 610, two groups of fixing frames 612 are fixedly provided at the opposite ends of the two liquid cooling plates 66 corresponding to the positive and negative ear positions of the battery block 4, a sliding sleeve 613 is fixedly provided on one side of the two groups of fixing frames 612, a heat conducting sheet 614 is slidably provided on the inner side of the two groups of sliding sleeves 613, two groups of rubber sleeves 615 are fixedly provided on one end of the heat conducting sheet 614, two groups of flow guide pipes 616 are fixedly provided on the inner side of the two groups of rubber sleeves 615, a fixing ring 617 is fixedly provided on the outer side of the positive and negative ear of the upper end of the battery block 4, two groups of guide seats 618 are fixedly provided on the side of the upper end of the fixing ring 617 away from the heat conducting sheet 614, and an L-shaped seat 619 is fixedly provided on the side of the upper end of the fixing ring 617 close to the heat conducting sheet 614.

[0035] The lower side of the push block 62 is set between the two groups of protrusions 67, the fixing nail 63 and the sleeve rod 64 are slidably set, the two groups of liquid cooling plates 66 are mirror-symmetrically set, the upper side of the four groups of connecting pipes 611 passes through the battery pack shell 1 and is fixedly connected to the circulation groove 610 in the liquid cooling plate 66, the middle two groups of the four groups of connecting pipes 611 are connected to the two groups of guide shells 57 on both sides respectively, the distance between the two groups of fixing frames 612 is greater than the diameter of the battery block 4 pole ears, the heat conductive sheet 614 is an elastic metal material, and the two groups of guide pipes 616 are fixedly connected to the liquid cooling plate 66 and communicate with the internal circulation groove 610.

[0036] The push block 62 is fixed to the upper end of the battery partition frame 3 by rotating the fixing bolt 61, and the rotating push block 62 will push the protrusions 67 on both sides and the liquid cooling plate 2 66 to slide outward along the two sets of fixing nails 63, stretching the spring 69. At the same time, the liquid cooling plate 2 66 will push the heat conducting sheet 614 close to the position of the battery block 4 pole ear to absorb the heat emitted by the pole ear. When the battery is subsequently disassembled, the fixing bolt 61 is rotated in the opposite direction, and the spring 69 will pull the two sets of liquid cooling plates 2 66 together to avoid blocking the installation or disassembly of the battery block 4. When the liquid cooling plate 2 66 pushes the heat conducting sheet 614 to move closer to the pole ear of the battery block 4, the heat is first It will come into contact with the L-shaped seat 619, causing the heat conductive sheet 614 to bend into an arc shape. The two ends of the heat conductive sheet 614 that continue to move will be guided by the two sets of guide seats 618 to surround the outside of the pole ear, getting closer to it for heat absorption work. With the connection of the four sets of connecting tubes 611, the coolant passes through the guide shell 57 and enters the liquid cooling plate 2 66 and the guide tube 616. The liquid cooling plate 2 66 is used to absorb heat and cool the space on the upper side of the battery block 4, and several sets of heat conductive sheets 614 cooperate with the coolant inside the guide tube 616 to absorb heat from the pole ear of the battery block 4 where the heat is most serious, thereby achieving a better cooling effect as a whole.

[0037] Working principle: When in use, the cooling liquid is pumped from the upper liquid cooling pipe 59 into the upper guide shell 57 through an external cooling liquid pump. The cooling liquid is respectively introduced into the inner side of the two sets of switching heads 511 in the cylinder 55 by the upper guide shell 57 and the connector 56, and respectively introduced into the middle two sets of the four sets of positioning water pipes 54 through the corresponding two sets of guide grooves 512, and enters the circulation groove 52 set on the inner side of the liquid cooling plate 51. The cooling liquid is discharged from the inside to the outside in the circulation groove 52 into the guide groove 2 518 set inside the two sets of switching heads 517, and then enters the two sets of connecting heads 56 and the lower guide shell 57 on the lower side, and is discharged by another set of liquid cooling pipes 5 9 is discharged to the outside to realize the process of overall circulation of the coolant, and at the same time, the traditional liquid cooling plate 1 51 is divided into several plates, which reduces the internal circulation flow distance, avoids the temperature difference of the coolant when entering and discharging at one end, and enables several groups of liquid cooling plates 1 51 to better cool the battery block 4; and the switching head 2 517 connected by the motor 519 drives the switching head 2 517 to rotate intermittently in forward and reverse directions by 90 degrees, and when the switching head 2 517 rotates clockwise, the meshing setting of the gear 515 will drive the switching head 1 511 to rotate counterclockwise, and the two sides of the two groups of guide grooves 2 518 are opened, while maintaining the connection with the positioning water pipe 54 on one side, the switching The two groups of connectors 56 on the upper side are connected, and the opening of the lower connector 56 is blocked. Similarly, the guide groove 1 512 on the switching head 1 511 is kept connected to the positioning water pipe 54 on one side, while the connection with the two groups of connectors 56 on the upper side is disconnected, and the corresponding two groups of connectors 56 on the lower side are connected. At this time, the incoming coolant is introduced into the circulation groove 1 52 inside the liquid cooling plate 1 51 through the two groups of guide grooves 2 518 and the positioning water pipe 54. The coolant moves from the outside to the inside to realize the switching of the coolant inlet and outlet ends. The intermittent drive of the motor 519 is used to realize the switching of the coolant inlet and outlet modes, which better improves the temperature difference between the inlet and outlet ends of the coolant. And a plurality of heat sinks 58 arranged on the two groups of guide shells 57 dissipate heat and cool the coolant after absorbing heat; in addition, the push block 62 is driven to be fixed on the upper end of the battery partition frame 3 by rotating the fixing bolt 61, and the rotating push block 62 will push the protrusions 67 on both sides and the second liquid cooling plate 66 to slide outward along the two groups of fixing nails 63, stretching the spring 69, and at the same time, the second liquid cooling plate 66 will push the heat conducting sheet 614 close to the position of the pole ear of the battery block 4 to absorb the heat emitted by the pole ear, and when the battery is subsequently disassembled, the fixing bolt 61 is rotated in the opposite direction, and the spring 69 will pull the two groups of second liquid cooling plates 66 together to avoid blocking the installation or disassembly of the battery block 4;When the second liquid cooling plate 66 pushes the heat conducting sheet 614 to approach the tab of the battery block 4, it will first contact the L-shaped seat 619, causing the heat conducting sheet 614 to bend into an arc shape. The two ends of the heat conducting sheet 614 will be guided by the two sets of guide seats 618 to surround the outer side of the tab, so that it can absorb heat closer to the tab. With the connection of the four sets of connecting pipes 611, the coolant passes through the guide shell 57 and enters the second liquid cooling plate 66 and the guide pipe 616. The second liquid cooling plate 66 absorbs heat and cools the upper space of the battery block 4, and several sets of heat conducting sheets 614 cooperate with the coolant inside the guide pipe 616 to absorb heat from the tab of the battery block 4 where the heat is most serious, so that the overall cooling effect is better. ;

[0038] The battery block 4, the positive and negative terminals of the battery block 4, and the motor 519 in the present invention are common knowledge in the art, and their working principles are already known technologies. The models are selected according to actual use, so they will not be explained in detail.

[0039] 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 battery pack cooling device for a new energy vehicle, comprising a battery pack housing (1), characterized in that: Both ends of the battery pack housing (1) are fixedly provided with mounting bars (2) near the lower side, a battery partition frame (3) is fixedly provided inside the battery pack housing (1), a plurality of battery blocks (4) are installed inside the battery partition frame (3), a main cooling assembly (5) is provided at the bottom of the inside and both ends of the battery pack housing (1), a plurality of auxiliary cooling assemblies (6) are provided above the battery partition frame (3) and the plurality of battery blocks (4), the main cooling assembly (5) comprises a battery partition frame (3) provided at the bottom of the inside of the battery pack housing (1) A plurality of groups of liquid cooling plates (51) are provided between the intervals, two groups of circulation grooves (52) are provided on the inner side of the liquid cooling plate (51), a positioning plate (53) is fixedly provided on the liquid cooling plate (51), a positioning water pipe (54) is fixedly installed on one side of the liquid cooling plate (51) corresponding to the interface positions of the two groups of circulation grooves (52), a cylinder (55) is fixedly provided at one end of the four groups of positioning water pipes (54), four groups of connectors (56) are fixedly provided on the upper and lower sides of the cylinder (55), and the upper and lower sides of the cylinder (55) are respectively provided with A guide shell (57) is provided, and a plurality of groups of heat sinks (58) are fixedly arranged inside the two groups of guide shells (57) on the opposite sides thereof, and a liquid cooling tube (59) is fixedly installed at the front ends of the two groups of heat sinks (58), a connecting rod (510) is arranged near the middle of the inner side of the cylinder (55), and a switching head (511) is fixedly arranged at the front and rear ends of the connecting rod (510), a guide groove (512) is provided on the inner side of the switching head (511), and a gear ring (513) is fixedly arranged at the front end of the switching head (511), A cross (514) is fixedly provided on the inner side of the cylinder (55) near the front side of the first gear ring (513), four groups of gears (515) are rotatably provided on the cross (514), a second gear ring (516) is movably provided on the front side of the four groups of gears (515), a second switching head (517) is fixedly provided at the front end of the second gear ring (516), a second guide groove (518) is provided on the inner side of the second switching head (517), and a motor (519) is fixedly provided at the upper end of the mounting bar (2) at a position corresponding to the second switching head (517); The auxiliary cooling assembly (6) comprises a plurality of groups of fixing bolts (61) threadedly arranged at the upper end of the battery partition frame (3) near the middle position, a push block (62) is fixedly arranged on the outer side of the fixing bolt (61), and fixing nails (63) are fixedly arranged on both sides of the upper end of the battery partition frame (3) near the fixing bolt (61), and sleeve rods (64) are sleeved on the outer sides of the two groups of fixing nails (63), and the inner sides of the sleeve rods (64) are provided with movable openings (65), and one end of the sleeve rod (64) is fixedly provided with Liquid cooling plate 2 (66), a protrusion (67) is fixedly provided at the middle arc-shaped inner wall position of the liquid cooling plate 2 (66), a fixing block (68) is fixedly provided at the upper end of the two groups of liquid cooling plates 2 (66), a spring (69) is fixedly provided between the two groups of fixing blocks (68), a circulation groove 2 (610) is opened on the inner side of the two groups of liquid cooling plates 2 (66), and two groups of connecting pipes (611) are fixedly provided at one end of the two groups of liquid cooling plates 2 (66) corresponding to the opening position of the circulation groove 2 (610); Two groups of fixing frames (612) are fixedly arranged at opposite ends of the two groups of liquid cooling plates (66) corresponding to the positions of the positive and negative pole ears of the battery block (4); a sliding sleeve (613) is fixedly arranged on one side of the two groups of fixing frames (612); a heat conducting sheet (614) is slidably arranged on the inner side of the two groups of sliding sleeves (613); two groups of rubber sleeves (615) are fixedly arranged on one end of the heat conducting sheet (614); two groups of flow guide tubes (616) are fixedly arranged on the inner side of the two groups of rubber sleeves (615); a fixing ring (617) is fixedly arranged on the outer side of the positive and negative pole ears at the upper end of the battery block (4); two groups of guide seats (618) are fixedly arranged on the side of the upper end of the fixing ring (617) away from the heat conducting sheet (614); and an L-shaped seat (619) is fixedly arranged on the side of the upper end of the fixing ring (617) close to the heat conducting sheet (614); The positioning plate (53) is fixedly installed on the inner side of the battery pack housing (1); the positioning water pipe (54) is connected to the circulation tank 1 (52) and the inside of the cylinder (55); a plurality of groups of switch heads 2 (517) in the cylinder (55) are fixedly connected to each other via round rods; one group on the lower side of the two groups of guide shells (57) is fixedly connected to four groups of connectors (56) provided on the lower side of the cylinder (55) and the insides are connected; and the two groups of liquid cooling pipes (59) are connected to an external coolant pump; The switching head 1 (511), the switching head 2 (517) and the cylinder (55) are rotatably arranged; one side and the upper opening of the two groups of the guide groove 1 (512) correspond to the middle two groups of the four groups of positioning water pipes (54) and the connecting head (56); the four groups of the gears (515) are respectively meshed with the two groups of gear rings 2 (516); one side and the lower opening of the two groups of the guide groove 2 (518) correspond to the other two groups of the four groups of positioning water pipes (54) and the connecting head (56); the rotating shaft of the motor (519) is fixedly connected to the switching head 2 (517) on the front side; The liquid cooling tube (59) at the front end of the heat sink (58) of the upper guide shell (57) and the four groups of connectors (56) on the upper side of the cylinder (55) are connected to serve as a water inlet, and the liquid cooling tube (59) at the front end of the heat sink (58) of the lower guide shell (57) and the four groups of connectors (56) on the lower side of the cylinder (55) are connected to serve as a water outlet; The guide groove 1 (512) of the switching head 1 (511) has two openings on one side and the upper side, and the guide groove 2 (518) of the switching head 2 (511) has two openings on one side and the lower side; One side opening of the guide groove 1 (512) is correspondingly connected to the two middle groups of positioning water pipes (54), the upper side opening of the guide groove 1 (512) is correspondingly connected to the two middle groups of connectors (54) on the upper side of the cylinder (55), one side opening of the guide groove 2 (518) is correspondingly connected to the two side groups of positioning water pipes (54), and the lower side opening of the guide groove 2 (518) is correspondingly connected to the two side groups of connectors (54) on the lower side of the cylinder (55), so that the coolant enters the liquid cooling plate 1 (51) from the switching head 1 (511) and flows out from the switching head 2 (517); The motor (519) drives the switching head 2 (517) to rotate 90 degrees clockwise and drives the switching head 1 (511) to rotate 90 degrees counterclockwise through the gear (515). The upper opening of the guide groove 1 (512) is correspondingly connected to the two middle groups of positioning water pipes (54), and the one side opening of the guide groove 1 (512) is correspondingly connected to the two middle groups of connecting heads (56) on the lower side of the cylinder (55). The one side opening of the guide groove 2 (518) is correspondingly connected to the two groups of connecting heads (56) on the upper side of the cylinder (55), and the lower side opening of the guide groove 2 (518) is correspondingly connected to the two groups of positioning water pipes (54) on the two sides, so that the coolant enters the liquid cooling plate 1 (51) from the switching head 2 (517) and flows out from the switching head 1 (51).

2. A new energy vehicle battery pack cooling device according to claim 1, characterized in that: The lower side of the push block (62) is arranged between the two groups of protrusions (67), the fixing pin (63) and the sleeve rod (64) are arranged in a sliding manner, and the two groups of liquid cooling plates (66) are arranged in a mirror-symmetrical manner.

3. A new energy vehicle battery pack cooling device according to claim 1, characterized in that: The upper sides of the four groups of connecting tubes (611) pass through the battery pack housing (1) and are fixedly connected to the second circulation groove (610) in the second liquid cooling plate (66), and the middle two groups of the four groups of connecting tubes (611) are connected to the two groups of guide shells (57) on both sides.

4. A new energy vehicle battery pack cooling device according to claim 1, characterized in that: The distance between the two groups of fixing frames (612) is greater than the diameter of the battery block (4) pole ear, the heat conducting sheet (614) is made of elastic metal material, and the two groups of flow guide pipes (616) are fixedly connected to the second liquid cooling plate (66) and communicate with the second internal circulation tank (610).

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