Lithium battery pack thermal management system structure for new energy automobile

Abstract

The invention relates to the technical field of lithium battery pack heat management, in particular to a lithium battery pack heat management system structure for a new energy automobile, and solves the problems that during heat dissipation and cooling of lithium battery pack heat management, individual lithium battery packs are usually overheated and are not cooled in time, and the cooling efficiency is affected due to temperature rise of cooling liquid during cooling, so that the service life of the lithium battery packs is prolonged. The lithium battery pack cooling device comprises a battery installation module, and an auxiliary heat dissipation module is arranged at the top end of the battery installation module. A plurality of lithium battery packs are inserted into T-shaped sliding grooves through T-shaped sliding blocks, the lithium battery packs are installed on the inner side of the installation guide rail frame, the lithium battery packs are installed in a separated mode through partition plates, the two ends of the installation guide rail frame are blocked through I-shaped blocking plates, and the lithium battery packs are prevented from falling out; therefore, the lithium battery pack is fixedly clamped, and the situation that the heat dissipation efficiency is affected by shaking in the using process is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery thermal management, and in particular to a lithium battery pack thermal management system structure for new energy vehicles. Background Art

[0002] Battery thermal management is a new technology that addresses thermal runaway or thermal dissipation caused by operating batteries at excessively high or low temperatures through rational design based on the optimal charge and discharge temperature range of the specific battery, combined with the battery's electrochemical characteristics and heat generation mechanism. This technology is based on multidisciplinary and multi-field foundations such as materials science, electrochemistry, heat transfer, and molecular dynamics. The goal is to improve overall battery performance by addressing thermal dissipation or thermal runaway caused by operating batteries at excessively high or low temperatures. When performing thermal management of lithium battery packs, the lithium battery needs to be cooled.

[0003] The existing thermal management of lithium battery packs often leads to overheating of individual lithium battery packs during heat dissipation and cooling, and the cooling efficiency is affected by the temperature increase of the coolant during cooling, making it impossible to cool subsequent lithium battery packs. Therefore, it does not meet the existing needs. In this regard, we propose a lithium battery pack thermal management system structure for new energy vehicles. Summary of the Invention

[0004] The purpose of the present invention is to provide a lithium battery pack thermal management system structure for new energy vehicles, so as to solve the problems proposed in the above-mentioned background technology that during the thermal management of the lithium battery pack, individual lithium battery packs often overheat and are not cooled in time during heat dissipation and cooling, and the temperature of the coolant rises during cooling, affecting the cooling efficiency and making it impossible to cool subsequent lithium battery packs.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a lithium battery pack thermal management system structure for new energy vehicles, comprising a battery mounting module, an auxiliary heat dissipation module provided at the top of the battery mounting module, a main heat dissipation module provided at the bottom of the battery mounting module, and a lithium battery pack provided inside the battery mounting module; The main heat dissipation module includes a liquid cooling plate, a thermal pad, a main liquid inlet pipe, a liquid outlet pipe and a connecting pipe. The liquid cooling plate is movably mounted on the bottom end of the mounting guide rail frame. A thermal pad is provided on the top of the liquid cooling plate. A main liquid inlet pipe is provided on one side of the liquid cooling plate, and a liquid outlet pipe is provided on the other side of the liquid cooling plate. Both the main liquid inlet pipe and the liquid outlet pipe are through-connected to the interior of the liquid cooling plate, and the two fitted liquid cooling plates are movably connected via a connecting pipe.

[0006] Preferably, the main heat dissipation module also includes a secondary liquid inlet pipe, a sliding groove and a sealing plate. Two secondary liquid inlet pipes are provided at the bottom end of the liquid cooling plate, sliding grooves are provided inside the secondary liquid inlet pipes, and a sealing plate is fixedly installed on the inner wall surface of the liquid cooling plate.

[0007] Preferably, the main heat dissipation module also includes an electric push rod, a fixed platform, a rotating arc block, a blocking plate, a rotating shaft, an active rack and a driven gear, a sealing plate is slidably installed inside the sliding groove, two electric push rods are fixedly installed on one side of the bottom end of the liquid cooling plate, the output end of the electric push rod is fixedly connected to the active rack, the outer end of the active rack is fixedly connected to the sealing plate, the top of the active rack is meshed with the driven gear, the inner side of the liquid cooling plate is rotatably installed with a rotating arc block, both ends of the rotating arc block are fixedly installed with a blocking plate, the blocking plates are fixedly connected to the driven gear, the bottom end of the liquid cooling plate is fixedly installed near the rotating arc block, the rotating arc block is movably stuck in the interior of the fixed platform, and the sealing plates are in contact with the surface of the rotating arc block.

[0008] Preferably, the battery mounting module includes a mounting guide rail frame, a T-shaped slide groove, an I-shaped blocking plate, a mounting block, a partition plate and a partition block. T-shaped slide grooves are provided on both sides of the mounting guide rail frame, and I-shaped blocking plates are movably installed at both ends of the mounting guide rail frame. Mounting blocks are fixedly installed on the side of the I-shaped blocking plate close to the mounting guide rail frame, and the mounting blocks are slid into the interior of the T-shaped slide groove. Multiple partition plates are movably installed on the inner side of the mounting guide rail frame, and partition blocks are fixedly installed on both sides of the partition plate, and the partition blocks are slid into the interior of the T-shaped slide groove.

[0009] Preferably, the battery mounting module also includes a guide rail frame top groove, a screw rod and a guide rod. The top of the mounting guide rail frame is provided with two guide rail frame top grooves, one of which is rotatably installed with a screw rod inside, and the other is fixedly installed with a guide rod inside the top groove of the guide rail frame. A screw motor is provided inside the mounting guide rail frame, and the output end of the screw motor is connected to the screw rod through a coupling.

[0010] Preferably, the auxiliary heat dissipation module includes a movable frame, a connecting rod, a ventilation plate, an electric motor, a cooling fan and a screw movable sleeve. The movable frame is slidably installed on the top of the mounting guide rail frame, the connecting rod is fixedly installed on the inner side of the mobile frame, the ventilation plate is fixedly installed on the inner side of the connecting rod, the top of the ventilation plate is provided with an electric motor, the output end of the electric motor is connected to the cooling fan through a coupling, and screw movable sleeves are fixedly installed on both sides of the bottom end of the movable frame.

[0011] Preferably, the screw rod movable sleeves are movably connected to the screw rod and the guide rod respectively.

[0012] Preferably, T-shaped sliders are fixedly installed at both ends of the lithium battery pack, and the T-shaped sliders are slid into the inside of the T-shaped slide groove. The surface of the lithium battery pack located on the outermost side is in contact with the surface of the I-type sealing plate and the partition block, the surface of the lithium battery pack located on the inner side is in contact with the surface of the partition block, and the bottom end of the lithium battery pack is in contact with the surface of the thermal pad.

[0013] Preferably, the main liquid inlet pipe and the liquid outlet pipe are both connected to the connecting pipe on the surface of the liquid cooling plate.

[0014] Preferably, temperature sensors are provided on both sides of the liquid cooling plate, and the temperature sensors are electrically connected to the electric push rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the T-shaped chute, I-shaped blocking plate and partition plate, so that when the device is in use, multiple lithium battery packs can be inserted into the T-shaped chute through the T-shaped slider, and the lithium battery packs can be installed on the inner side of the mounting rail frame. The lithium battery packs are separated and installed by the partition plate, and the two ends of the mounting rail frame are blocked by the I-shaped blocking plate to prevent the lithium battery packs from falling out, thereby fixing and clamping the lithium battery packs and preventing them from shaking during use and affecting the heat dissipation efficiency. 2. The present invention utilizes an auxiliary heat dissipation module in conjunction with a main heat dissipation module. This allows the device to add coolant to the liquid cooling plate through the main liquid inlet pipe during use. Heat is then transferred between the coolant and the liquid cooling plate in conjunction with the thermal pad, thereby providing basic heat dissipation for the lithium battery pack. When a particular lithium battery pack reaches a high temperature, the auxiliary heat dissipation module can be moved to allow the cooling fan to provide additional heat to that particular pack, preventing local overheating and untimely cooling. 3. The present invention utilizes the cooperation of the sealing plate and the sliding groove. When the temperature sensor inside the liquid cooling plate detects that the coolant temperature at the liquid inlet is too high, the temperature sensor will drive the electric push rod to start, causing the electric push rod to pull the active rack and the sealing plate inward to retract. The sealing plate opens from the sliding groove, allowing the secondary liquid inlet pipe to communicate with the interior of the liquid cooling plate. At the same time, the active rack drives the driven gear to rotate, and then drives the rotating arc block to rotate through the blocking plate, dividing the interior of the liquid cooling plate into two areas. The high-temperature coolant flows directly out to the heat storage area through the main liquid inlet pipe, while the secondary liquid inlet pipe is fed with new coolant to ensure the heat dissipation efficiency of the subsequent lithium battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 It is a schematic diagram of the explosion structure of the present invention as a whole; Figure 3 It is a cross-sectional side view of the position of the rotating arc block of the present invention; Figure 4 It is a cross-sectional side view of the driven gear position of the present invention; Figure 5 A cross-sectional front view of the present invention as a whole; Figure 6 A cross-sectional top view of the present invention as a whole; Figure 7 For the present invention Figure 3 Schematic diagram of the local structure of part A; Figure 8 For the present invention Figure 4 Schematic diagram of the local structure of part B.

[0017] Figure: 1. Battery mounting module; 101. Mounting guide rail; 102. T-shaped guide slot; 103. Top guide rail slot; 104. Screw; 105. Guide rod; 106. I-type blocking plate; 107. Mounting block; 108. Divider plate; 109. Divider block; 2. Auxiliary heat dissipation module; 201. Moving frame; 202. Connecting rod; 203. Ventilation plate; 204. Electric motor; 205. Cooling fan; 206. Screw Moving sleeve; 3. Main heat dissipation module; 301. Liquid cooling plate; 302. Thermal pad; 303. Main liquid inlet pipe; 304. Liquid outlet pipe; 305. Auxiliary liquid inlet pipe; 306. Electric push rod; 307. Sliding groove; 308. Connecting pipe; 309. Fixed platform; 310. Rotating arc block; 311. Blocking plate; 312. Rotating shaft; 313. Sealing plate; 314. Driving rack; 315. Driven gear; 4. Lithium battery pack; 5. T-shaped slider. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in 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.

[0019] See also Figures 1 to 8 The present invention provides an embodiment of a lithium battery pack thermal management system structure for a new energy vehicle, comprising a battery mounting module 1, an auxiliary heat dissipation module 2 being provided at the top of the battery mounting module 1, a main heat dissipation module 3 being provided at the bottom of the battery mounting module 1, and a lithium battery pack 4 being provided inside the battery mounting module 1; The main heat dissipation module 3 includes a liquid cooling plate 301, a thermal pad 302, a main liquid inlet pipe 303, a liquid outlet pipe 304 and a connecting pipe 308. The liquid cooling plate 301 is movably installed at the bottom end of the mounting guide rail frame 101. A thermal pad 302 is provided at the top of the liquid cooling plate 301. A main liquid inlet pipe 303 is provided on one side of the liquid cooling plate 301, and a liquid outlet pipe 304 is provided on the other side of the liquid cooling plate 301. The main liquid inlet pipe 303 and the liquid outlet pipe 304 are both through-connected to the interior of the liquid cooling plate 301, and the two fitted liquid cooling plates 301 are movably connected via a connecting pipe 308.

[0020] The main heat dissipation module 3 also includes an auxiliary liquid inlet pipe 305, a sliding groove 307 and a sealing plate 313. Two auxiliary liquid inlet pipes 305 are provided at the bottom end of the liquid cooling plate 301. The interior of the auxiliary liquid inlet pipe 305 is provided with a sliding groove 307, and a sealing plate 313 is fixedly installed on the inner wall surface of the liquid cooling plate 301.

[0021] The main heat dissipation module 3 also includes an electric push rod 306, a fixed platform 309, a rotating arc block 310, a blocking plate 311, a rotating shaft 312, an active rack 314 and a driven gear 315. A sealing plate 313 is slidably installed inside the sliding groove 307. Two electric push rods 306 are fixedly installed on one side of the bottom end of the liquid cooling plate 301. The output ends of the electric push rods 306 are fixedly connected to the active rack 314. The outer end of the active rack 314 is fixedly connected to the sealing plate 313. The top of the bar 314 is meshed with a driven gear 315, and a rotating arc block 310 is rotatably installed on the inner side of the liquid cooling plate 301. Both ends of the rotating arc block 310 are fixedly installed with a blocking plate 311, and the blocking plate 311 is fixedly connected to the driven gear 315. A fixed platform 309 is fixedly installed at the bottom end of the liquid cooling plate 301 near the rotating arc block 310. The rotating arc block 310 is movably inserted into the interior of the fixed platform 309, and the sealing plate 313 is in contact with the surface of the rotating arc block 310.

[0022] The battery installation module 1 includes an installation guide rail frame 101, a T-shaped slide groove 102, an I-shaped blocking plate 106, a mounting block 107, a partition plate 108 and a partition block 109. T-shaped slide grooves 102 are provided on both sides of the installation guide rail frame 101, and I-shaped blocking plates 106 are movably installed at both ends of the installation guide rail frame 101. The I-shaped blocking plates 106 are fixedly installed on the side close to the installation guide rail frame 101, and the installation blocks 107 are all slidably inserted into the interior of the T-shaped slide groove 102. A plurality of partition plates 108 are movably installed on the inner side of the installation guide rail frame 101, and partition blocks 109 are fixedly installed on both sides of the partition plate 108, and the partition blocks 109 are all slidably inserted into the interior of the T-shaped slide groove 102.

[0023] The battery mounting module 1 also includes a guide rail frame top groove 103, a screw rod 104 and a guide rod 105. Two guide rail frame top grooves 103 are provided at the top of the mounting guide rail frame 101. A screw rod 104 is rotatably installed inside one of the guide rail frame top grooves 103, and a guide rod 105 is fixedly installed inside the other guide rail frame top groove 103. A screw motor is provided inside the mounting guide rail frame 101, and the output end of the screw motor is connected to the screw rod 104 through a coupling.

[0024] Through the cooperation of the T-shaped slide groove 102, the I-shaped blocking plate 106 and the partition plate 108, when the device is in use, multiple lithium battery packs 4 can be inserted into the T-shaped slide groove 102 through the T-shaped slider 5, and the lithium battery packs 4 can be installed on the inner side of the mounting guide frame 101. The lithium battery packs 4 are separated and installed by the partition plate 108, and the two ends of the mounting guide frame 101 are blocked by the I-shaped blocking plate 106 to prevent the lithium battery packs 4 from falling out, thereby fixing and clamping the lithium battery packs 4 to prevent them from shaking during use and affecting the heat dissipation efficiency.

[0025] The auxiliary heat dissipation module 2 includes a movable frame 201, a connecting rod 202, a ventilation plate 203, an electric motor 204, a cooling fan 205 and a screw movable sleeve 206. The movable frame 201 is slidably installed on the top of the guide rail frame 101, and the connecting rod 202 is fixedly installed on the inner side of the mobile frame 201. The ventilation plate 203 is fixedly installed on the inner side of the connecting rod 202. The top of the ventilation plate 203 is provided with an electric motor 204, and the output end of the electric motor 204 is connected to the cooling fan 205 through a coupling. The screw movable sleeves 206 are fixedly installed on both sides of the bottom end of the movable frame 201.

[0026] The auxiliary heat dissipation module 2 and the main heat dissipation module 3 work together to allow coolant to be added to the liquid cooling plate 301 via the main liquid inlet pipe 303 during use. Heat is then transferred between the coolant and the liquid cooling plate 301 in conjunction with the thermal pad 302, providing basic cooling for the lithium battery packs 4. If a particular lithium battery pack 4 experiences high temperatures, the auxiliary heat dissipation module 2 can be moved to allow the cooling fan 205 to provide additional cooling for that particular pack, preventing local overheating and delayed cooling.

[0027] The screw rod movable sleeve 206 is movably connected to the screw rod 104 and the guide rod 105 respectively.

[0028] T-shaped sliders 5 are fixedly installed at both ends of the lithium battery pack 4, and the T-shaped sliders 5 are slid into the inside of the T-shaped slide groove 102. The surfaces of the lithium battery packs 4 located on the outermost side are in contact with the surfaces of the I-type sealing plate 106 and the partition block 109, the surfaces of the lithium battery packs 4 located on the inner side are in contact with the surface of the partition block 109, and the bottom ends of the lithium battery packs 4 are in contact with the surface of the thermal pad 302.

[0029] The main liquid inlet pipe 303 and the liquid outlet pipe 304 are both connected to the connecting pipe 308 on the surface of the liquid cooling plate 301 .

[0030] Through the coordination of the sealing plate 313 and the sliding groove 307, when the temperature sensor inside the liquid cooling plate 301 detects that the coolant temperature at the liquid inlet is too high, the temperature sensor activates the electric push rod 306, causing the electric push rod 306 to pull the active rack 314 and the sealing plate 313 inward, and the sealing plate 313 opens from the sliding groove 307, allowing the secondary liquid inlet pipe 305 to communicate with the interior of the liquid cooling plate 301. At the same time, the active rack 314 drives the driven gear 315 to rotate, which in turn drives the rotating arc block 310 to rotate through the blocking plate 311, dividing the interior of the liquid cooling plate 301 into two areas. The high-temperature coolant flows directly out through the main liquid inlet pipe 303 to the heat storage area, while the secondary liquid inlet pipe 305 is filled with new coolant, ensuring the subsequent heat dissipation efficiency of the lithium battery pack 4.

[0031] Temperature sensors are provided on both sides of the liquid cooling plate 301 , and both temperature sensors are electrically connected to the electric push rod 306 .

[0032] When the lithium battery pack thermal management system structure for new energy vehicles is in use, multiple lithium battery packs 4 can be inserted into the T-shaped slide groove 102 through the T-shaped slider 5, and the lithium battery packs 4 can be installed on the inner side of the mounting guide frame 101. The lithium battery packs 4 are separated and installed by the partition plate 108, and the two ends of the mounting guide frame 101 are blocked by the I-type blocking plate 106 to prevent the lithium battery packs 4 from falling out, thereby fixing and clamping the lithium battery packs 4 to prevent them from shaking during use and affecting the heat dissipation efficiency.

[0033] Coolant is added to the liquid cooling plate 301 through the main liquid inlet pipe 303. Heat is then transferred between the coolant and the liquid cooling plate 301 in conjunction with the thermal pad 302, providing basic cooling for the lithium battery packs 4. If a particular lithium battery pack 4 experiences high temperatures, the auxiliary heat dissipation module 2 can be moved to allow the cooling fan 205 to provide additional cooling for that particular battery pack 4, preventing localized overheating and delayed cooling.

[0034] When the auxiliary heat dissipation module 2 needs to be moved, the screw 104 can be driven to rotate by the screw motor, so that the screw 104 drives the screw movable sleeve 206 on its surface to move, and then drives the movable frame 201 to move on the surface of the mounting guide rail frame 101, so that the movable frame 201 moves to the position of the lithium battery pack 4 that requires additional heat dissipation.

[0035] When the temperature sensor inside the liquid cooling plate 301 detects that the coolant temperature at the liquid inlet is too high, the temperature sensor activates the electric push rod 306, causing it to pull the active rack 314 and sealing plate 313 inward. The sealing plate 313 opens from the sliding slot 307, allowing the secondary liquid inlet pipe 305 to communicate with the interior of the liquid cooling plate 301. Simultaneously, the active rack 314 rotates the driven gear 315, which in turn drives the rotating arc block 310 via the blocking plate 311, dividing the interior of the liquid cooling plate 301 into two areas. The high-temperature coolant flows directly through the main liquid inlet pipe 303 to the heat storage area, while new coolant is introduced into the secondary liquid inlet pipe 305, ensuring efficient heat dissipation from the subsequent lithium battery pack 4.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A lithium battery pack thermal management system structure for new energy vehicles, comprising a battery mounting module (1), characterized in that: An auxiliary heat dissipation module (2) is provided at the top end of the battery installation module (1), a main heat dissipation module (3) is provided at the bottom end of the battery installation module (1), and a lithium battery pack (4) is provided inside the battery installation module (1); The main heat dissipation module (3) comprises a liquid cooling plate (301), a thermal pad (302), a main liquid inlet pipe (303), a liquid outlet pipe (304) and a connecting pipe (308); the liquid cooling plate (301) is movably mounted on the bottom end of the mounting guide rail frame (101); a thermal pad (302) is provided on the top end of the liquid cooling plate (301); a main liquid inlet pipe (303) is provided on one side of the liquid cooling plate (301); and a liquid outlet pipe (304) is provided on the other side of the liquid cooling plate (301); the main liquid inlet pipe (303) and the liquid outlet pipe (304) are both connected to the inside of the liquid cooling plate (301); and the two fitted liquid cooling plates (301) are movably connected via the connecting pipe (308).

2. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 1, characterized in that: The main heat dissipation module (3) further comprises a secondary liquid inlet pipe (305), a sliding groove (307) and a sealing plate (313); the bottom end of each liquid cooling plate (301) is provided with two secondary liquid inlet pipes (305); the interior of each secondary liquid inlet pipe (305) is provided with a sliding groove (307); and a sealing plate (313) is fixedly mounted on the inner wall surface of each liquid cooling plate (301).

3. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 2, characterized in that: The main heat dissipation module (3) further includes an electric push rod (306), a fixed platform (309), a rotating arc block (310), a blocking plate (311), a rotating shaft (312), an active rack (314) and a driven gear (315); a sealing plate (313) is slidably installed inside the sliding groove (307); two electric push rods (306) are fixedly installed on one side of the bottom end of the liquid cooling plate (301); the output ends of the electric push rods (306) are fixedly connected to the active rack (314); the outer ends of the active rack (314) are fixedly connected to the sealing plate (313); the active The top of the rack (314) is meshed with a driven gear (315), the inner side of the liquid cooling plate (301) is rotatably mounted with a rotating arc block (310), both ends of the rotating arc block (310) are fixedly mounted with a blocking plate (311), the blocking plates (311) are fixedly connected to the driven gear (315), the bottom end of the liquid cooling plate (301) is fixedly mounted with a fixed platform (309) near the rotating arc block (310), the rotating arc block (310) is movably inserted into the interior of the fixed platform (309), and the sealing plates (313) are in contact with the surface of the rotating arc block (310).

4. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 3, characterized in that: The battery installation module (1) includes an installation guide rail frame (101), a T-shaped slide groove (102), an I-shaped blocking plate (106), an installation block (107), a partition plate (108) and a partition block (109), wherein the installation guide rail frame (101) is provided with a T-shaped slide groove (102) on both sides, and the installation guide rail frame (101) is provided with an I-shaped blocking plate (106) movably installed on both ends, and the I-shaped blocking plate (106) is fixedly installed with an installation block (107) on the side close to the installation guide rail frame (101), and the installation blocks (107) are slidably inserted into the interior of the T-shaped slide groove (102), and a plurality of partition plates (108) are movably installed on the inner side of the installation guide rail frame (101), and partition blocks (109) are fixedly installed on both sides of the partition plate (108), and the partition blocks (109) are slidably inserted into the interior of the T-shaped slide groove (102).

5. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 4, characterized in that: The battery installation module (1) further comprises a guide rail frame top groove (103), a screw rod (104) and a guide rod (105); the top of each installation guide rail frame (101) is provided with two guide rail frame top grooves (103); a screw rod (104) is rotatably installed inside one of the guide rail frame top grooves (103); and a guide rod (105) is fixedly installed inside the other guide rail frame top groove (103); a screw motor is provided inside the installation guide rail frame (101); and the output end of the screw motor is connected to the screw rod (104) via a coupling.

6. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 5, characterized in that: The auxiliary heat dissipation module (2) comprises a movable frame (201), a connecting rod (202), a ventilation plate (203), an electric motor (204), a cooling fan (205) and a screw movable sleeve (206); the movable frame (201) is slidably mounted on the top of the mounting guide rail frame (101); the connecting rod (202) is fixedly mounted on the inner side of the movable frame (201); the ventilation plate (203) is fixedly mounted on the inner side of the connecting rod (202); the electric motor (204) is provided on the top of the ventilation plate (203); the output end of the electric motor (204) is connected to the cooling fan (205) via a coupling; and the screw movable sleeve (206) is fixedly mounted on both sides of the bottom end of the movable frame (201).

7. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 6, characterized in that: The screw rod movable sleeves (206) are movably connected to the screw rod (104) and the guide rod (105) respectively.

8. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 6, characterized in that: Both ends of the lithium battery pack (4) are fixedly mounted with T-shaped sliders (5), and the T-shaped sliders (5) are slidably engaged with the inside of the T-shaped slot (102). The surfaces of the lithium battery pack (4) located on the outermost side are in contact with the surfaces of the I-shaped blocking plate (106) and the partition block (109), and the surfaces of the lithium battery pack (4) located on the inner side are in contact with the surface of the partition block (109). The bottom ends of the lithium battery pack (4) are in contact with the surface of the thermal pad (302).

9. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 6, characterized in that: The main liquid inlet pipe (303) and the liquid outlet pipe (304) are both connected to the connecting pipe (308) on the surface of the liquid cooling plate (301).

10. The thermal management system structure of a lithium battery pack for a new energy vehicle according to claim 6, characterized in that: Temperature sensors are provided on both sides of the liquid cooling plate (301), and the temperature sensors are electrically connected to the electric push rod (306).

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