A temperature control device for lithium battery of new energy vehicle

Abstract

The present invention relates to a battery temperature control technology, specifically a temperature control device for a lithium battery of a new energy vehicle, including a lithium battery pack, wherein the lithium battery pack is divided into a main load area and a secondary load area, the main load area on the lithium battery pack is connected to a main load interface, the main load interface is movably plugged with a high-voltage connector, and a high-temperature power-off structure is provided between the main load interface and the high-voltage connector. The present invention is designed as a main load area and a secondary load area in the lithium battery pack, and different interfaces are provided between the two areas. When the temperature of the lithium battery in the main load area rises due to overload, the high-temperature power-off structure can be used to disconnect the high-voltage connector connected to the main load area through the main load interface. At this time, the connection of the secondary load area can meet the short-term basic power supply of the new energy vehicle, and the power supply will be restored after the temperature of the main load area of ​​the lithium battery drops, thereby improving the temperature control effect of the lithium battery of the new energy vehicle.

Description

Technical Field

[0001] The invention relates to a battery temperature control technology, in particular to a temperature control device for a lithium battery of a new energy vehicle. Background Art

[0002] New energy vehicles refer to vehicles that use non-traditional energy as a power source. New energy vehicles use alternative energy sources, such as electricity, hydrogen, etc. to drive the vehicle. They are more environmentally friendly and have lower emissions, and meet the requirements of sustainable development. The temperature control device of the lithium battery of new energy vehicles is a device used to maintain the lithium battery within the optimal temperature range. The performance and life of the lithium battery will be significantly affected by the temperature. Too high or too low temperature will have a negative impact on the health of the battery. Therefore, the temperature control system is an important part of battery management in electric vehicles. The lithium battery temperature control device of new energy vehicles plays a vital role in ensuring the safety, performance and life of the battery. With the continuous advancement of electric vehicle technology, the design of the temperature control system is also constantly optimized to cope with higher power requirements, more extreme environmental conditions and longer mileage requirements.

[0003] At present, the new energy vehicle lithium battery circuit can be divided into a main load circuit and a secondary load circuit according to the different functions of the load. The main load circuit mainly provides driving energy for the car, and the secondary load circuit mainly provides energy for the functional components of the car. When the main load circuit generates temperature due to overload, a temperature control device will be used to cool it down. When the temperature control device of the new energy vehicle lithium battery is in use, it cannot disconnect the circuit in time when it detects that the lithium battery generates high temperature due to the load. The high temperature generated will be transmitted to different devices through the connected cables. Due to improper temperature control of the new energy vehicle lithium battery, the equipment on the car will age due to high temperature, affecting the service life of the equipment and reducing the service life of the whole new energy vehicle. Summary of the invention

[0004] The purpose of the present invention is to provide a temperature control device for a lithium battery of a new energy vehicle to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A temperature control device for a lithium battery of a new energy vehicle, comprising a lithium battery pack, wherein the lithium battery pack is divided into a main load area and a secondary load area, wherein the main load area on the lithium battery pack is connected to a main load interface, wherein the main load interface is movably plugged with a high-voltage connector, and a high-temperature power-off structure is provided between the main load interface and the high-voltage connector, wherein the high-temperature power-off structure is installed on the lithium battery pack;

[0007] The high-temperature power-off structure includes a spacing adjustment mechanism connected to the main load interface and the high-voltage connector, a transmission mechanism connected to the spacing adjustment mechanism, and a closing mechanism connected to the transmission mechanism. The spacing adjustment mechanism is arranged on the lithium battery pack. The main load area inside the lithium battery pack is provided with a temperature sensor, and the temperature sensor is electrically connected to the transmission mechanism.

[0008] The temperature sensor sends a signal when the preset alarm value is reached, and the signal is used to control the operation of the transmission mechanism. The operation of the transmission mechanism is used to simultaneously drive the closing mechanism and the spacing adjustment mechanism to operate. The operation of the spacing adjustment mechanism is used to control the main load interface and the high-voltage connector to move closer to or farther away from each other. When the spacing adjustment mechanism operates to move the main load interface and the high-voltage connector away from each other to a maximum distance, the closing mechanism can simultaneously contact and fit the ports of the main load interface and the high-voltage connector.

[0009] The temperature control device for lithium batteries of new energy vehicles as described above: the spacing adjustment mechanism comprises symmetrically arranged scissor frames and connecting blocks arranged on the scissor frames;

[0010] The upper and lower sides of the main load interface are fixedly connected with a rotating rod, and the upper and lower sides of the high-voltage connector are also fixedly connected with a rotating rod;

[0011] One end of the two scissor frames is rotatably connected to the rotating rods fixedly connected on the upper and lower sides of the main load interface, and the other end of the two scissor frames is rotatably connected to the rotating rods fixedly connected on the upper and lower sides of the high-voltage joint.

[0012] The temperature control device for lithium batteries of new energy vehicles as described above: the transmission mechanism comprises a synchronous adjustment component, a mounting frame slidably connected to both ends of the synchronous adjustment component, and a linkage component fixedly connected to one end of the synchronous adjustment component, and the linkage component is connected to the driving mechanism;

[0013] The synchronous adjustment component includes a bidirectional screw and a first limit head fixedly connected to both ends of the bidirectional screw, the bidirectional screw is threadedly connected to the connecting block, the bidirectional screw is slidably connected in a sliding groove opened on the mounting frame, and the mounting frame is fixedly mounted on the outer shell of the lithium battery pack.

[0014] The temperature control device for lithium batteries of new energy vehicles as described above: the linkage assembly comprises a screw rod fixedly connected to one of the first limit heads and a transmission wheel fixedly connected to the other end of the screw rod;

[0015] The screw rod is connected with the telescopic assembly.

[0016] The temperature control device for lithium batteries of new energy vehicles as described above: the telescopic component includes a first sliding frame and a sliding rod fixedly connected to the first sliding frame at one end, a sliding block is slidably connected inside the guide groove opened on the first sliding frame, the sliding block is threadedly connected to the screw rod, two connecting shafts are fixedly connected to the sliding rod, and the sliding rod is slidably connected to the mounting component.

[0017] The new energy vehicle lithium battery temperature control device as described above: the mounting assembly is mounted on the outer shell of the lithium battery pack, and the mounting assembly includes a support frame and support rods fixedly connected to the upper and lower sides of the support frame;

[0018] The support frame is installed on the shell of the lithium battery pack, a movable groove is provided on the support rod, two second sliding frames are symmetrically fixedly connected to the support frame at one end of the movable groove, L-shaped sliding grooves are symmetrically fixedly connected on both sides of the support rod, a slider is slidably connected in the transverse sliding groove provided in the second sliding frame, and the slider is rotatably connected to one end of the screw rod;

[0019] The support rod is slidably connected to the sliding rod, and the movable groove is slidably connected to the connecting portion of the sliding rod and the first sliding frame.

[0020] The above-mentioned new energy vehicle lithium battery temperature control device: the driving mechanism includes a connecting rod and a driving motor mounted on the connecting rod, and the two ends of the connecting rod are respectively slidably connected to the two second sliding frames;

[0021] A driving wheel is coaxially fixed on the output shaft of the driving motor, the driving wheel is connected to a transmission belt, and two ends of the transmission belt are drivingly connected to two driving wheels.

[0022] The temperature control device for lithium batteries of new energy vehicles as described above: the closing mechanism comprises a folding assembly and a closing plate assembly connected to the folding assembly;

[0023] The folding assembly includes a crank rod and a rotating seat rotatably connected to one end of the crank rod, wherein a limiting shaft is provided on one end of the crank rod close to the closing plate assembly, the limiting shaft is slidably connected in an L-shaped sliding groove, the other end of the crank rod is rotatably connected to the connecting shaft, and the rotating seat is fixedly connected to the closing plate assembly.

[0024] The temperature control device for lithium batteries of new energy vehicles as described above: the closing plate assembly comprises a bottom plate and a closing plate arranged on one side of the bottom plate, and the four corners of the bottom plate are fixedly connected to the rotating seat;

[0025] Four plug-in columns are fixedly connected in a rectangular array on the closed plate, a spring is arranged on the closed plate at the center of the four plug-in columns, one end of the spring is fixedly connected to the closed plate, and the other end of the spring is fixedly connected to the bottom plate.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The lithium battery pack is divided into a main load area and a sub-load area, and different interfaces are provided between the two areas. When the temperature of the lithium battery in the main load area rises due to overload, the high-temperature power-off structure can disconnect the high-voltage connector connected to the main load area through the main load interface. At this time, the connection of the sub-load area can meet the short-term basic power supply of the new energy vehicle, and the power supply will be restored after the temperature of the main load area of ​​the lithium battery drops, thereby improving the temperature control effect of the lithium battery of the new energy vehicle.

[0028] By arranging a temperature sensor in the main load area, when the temperature of the main load area reaches the alarm value of the temperature sensor, the temperature sensor sends a signal, the signal drives the transmission mechanism to operate, and the transmission mechanism can drive the spacing adjustment mechanism to operate. The spacing adjustment mechanism is connected between the main load interface and the high-voltage connector, and the main load interface and the high-voltage connector can be controlled to be close to or away from each other, so that the main load interface and the high-voltage connector can be plugged in and out, thereby disconnecting the high temperature from being transmitted to other devices of the new energy vehicle through the connecting cable, causing the service life of other devices to be reduced due to the high temperature.

[0029] Through the connection between the transmission mechanism and the closing mechanism, when the spacing adjustment mechanism disconnects the main load interface and the high-voltage connector, the closing mechanism can be driven to move through the transmission mechanism, and the closing mechanism can move between the main load interface and the high-voltage connector. The sealing effect is achieved by fitting the connecting ports of the main load interface and the high-voltage connector, which can prevent electric arcs from being generated due to exposed ports, or external dust from entering the ports of the main load interface and the high-voltage connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the temperature control device for lithium batteries in new energy vehicles.

[0031] Figure 2 This is a schematic diagram of the structure of another aspect of the overall temperature control device for lithium batteries of new energy vehicles.

[0032] Figure 3 This is a structural schematic diagram of the main load interface in the temperature control device of the lithium battery of new energy vehicles.

[0033] Figure 4 This is a schematic diagram of the high-temperature power-off structure in the temperature control device for lithium batteries of new energy vehicles.

[0034] Figure 5 This is a structural schematic diagram of another aspect of the high-temperature power-off structure in the temperature control device for lithium batteries in new energy vehicles.

[0035] Figure 6 This is a schematic diagram of the structure of the main load interface and high-voltage connector in the temperature control device of the lithium battery of new energy vehicles.

[0036] Figure 7 This is a structural schematic diagram of the spacing adjustment mechanism in the temperature control device of the lithium battery of new energy vehicles.

[0037] Figure 8 This is a schematic diagram of the structure of the bidirectional screw in the temperature control device of the lithium battery of new energy vehicles.

[0038] Fig. 9 This is a schematic diagram of the structure of the screw rod in the temperature control device of the lithium battery of new energy vehicles.

[0039] Fig.10 This is a structural schematic diagram of the first sliding frame in the temperature control device of a lithium battery in a new energy vehicle.

[0040] Fig.11 This is a schematic diagram of the structure of the sliding rod in the temperature control device of the lithium battery of a new energy vehicle.

[0041] Fig.12 This is a schematic diagram of the structure of the components installed in the temperature control device of the lithium battery of a new energy vehicle.

[0042] Fig.13 This is a structural schematic diagram of another orientation of the installed components in the temperature control device for lithium batteries in new energy vehicles.

[0043] Fig.14 This is a structural schematic diagram of another orientation of the installed components in the lithium battery temperature control device of a new energy vehicle.

[0044] Fig.15 This is a schematic diagram of the structure of the driving mechanism in the temperature control device of the lithium battery of new energy vehicles.

[0045] Fig.16 This is a schematic diagram of the structure of the closing mechanism in the temperature control device of the lithium battery of new energy vehicles.

[0046] Fig.17 This is a schematic diagram of the structure of the closed plate assembly in the temperature control device of the lithium battery of a new energy vehicle.

[0047] In the figure: 1. lithium battery pack; 2. main load interface; 3. high voltage connector; 4. scissors frame; 5. connecting block; 6. bidirectional screw; 7. first limit head; 8. mounting frame; 9. screw; 10. transmission wheel; 11. first sliding frame; 12. sliding block; 13. sliding rod; 14. connecting shaft; 15. support frame; 16. second sliding frame; 17. support rod; 18. movable groove; 19. L-shaped sliding groove; 20. connecting rod; 21. driving motor; 22. transmission belt; 23. crank rod; 24. rotating seat; 25. bottom plate; 26. closing plate; 27. plug-in column; 28. spring. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0049] See also Figure 1 to Figure 17 In an embodiment of the present invention, a temperature control device for a lithium battery of a new energy vehicle includes a lithium battery pack 1, wherein the lithium battery pack 1 is divided into a main load area and a secondary load area, wherein the main load area on the lithium battery pack 1 is connected to a main load interface 2, wherein the main load interface 2 is movably connected to a high-voltage connector 3, and a high-temperature power-off structure is provided between the main load interface 2 and the high-voltage connector 3, wherein the high-temperature power-off structure is installed on the lithium battery pack 1;

[0050] The main load area on the lithium battery pack 1 is connected to the main load interface 2 via a mineral insulated cable, and a coolant conduit is integrated on the mineral insulated cable;

[0051] Specifically, the mineral insulated cable has an outer sheath tube on the outside, and the coolant conduit is arranged inside the mineral insulated cable to form an internal pipeline; the outer sheath tube is made of seamless pipe and is drawn and reduced in diameter as a whole so as to wrap the insulation layer and the core of the internal pipeline; at the same time, the material strength, elongation, corrosion resistance, high temperature melting point and other aspects are optimized;

[0052] The outer sheath tube has high tensile strength, yield strength and melting point, and plays a role in protecting the internal wire core and pipeline when the car is bumped or accidentally collided during normal driving. S31083 (2205) aluminum alloy pipe is preferably used as the outer sheath tube.

[0053] The coolant conduit is synchronously drawn and reduced in diameter with the outer sheath tube and has ductility. Duplex stainless steel S31603 (SUS316L) aluminum alloy pipe is preferably used as the coolant conduit to meet the requirements of chloride ion and sulfur ion corrosion resistance.

[0054] The mineral insulated cable of the present invention can integrate a heat dissipation pipeline while realizing efficient heating, so that one component can simultaneously meet the requirements of two working conditions of heat dissipation and heating of lithium batteries, and has the performance of high and low temperature resistance and impact resistance.

[0055] In addition, the insulation layer of the internal pipeline is formed by filling powdered mineral insulation material inside the metal pipe sheath, and after drawing, shrinking, annealing and other processes, a dense whole similar to a ceramic form is formed. Mineral insulation materials with excellent insulation properties, chemical stability, thermal conductivity, high temperature stability and other aspects are selected as powdered mineral insulation materials.

[0056] Preferably, the powdered mineral insulating material is single crystal α-Si3N4 as the insulating material.

[0057] It should be noted that traditional mineral insulated cables use magnesium oxide as the insulation layer, and its advantages are good insulation performance, high temperature stability and good thermal conductivity.

[0058] However, the insulating material in the present invention needs to have the above properties and also needs to meet the requirements of chemical stability to ensure that it does not react with battery components under extreme conditions. At the same time, it needs to have higher thermal conductivity to take away the battery heat as much as possible. Therefore, single crystal α-Si3N4 is selected as the insulating material.

[0059] In addition, the wire core of the internal pipeline is made of a heating wire core material, and is made of an alloy material with high resistivity and high surface load to meet higher heating efficiency requirements, preferably a copper-nickel alloy or a nickel-chromium alloy.

[0060] The high-temperature power-off structure includes a spacing adjustment mechanism connected to the main load interface 2 and the high-voltage connector 3, a transmission mechanism connected to the spacing adjustment mechanism, and a closing mechanism connected to the transmission mechanism. The spacing adjustment mechanism is arranged on the lithium battery pack 1. The main load area inside the lithium battery pack 1 is provided with a temperature sensor, and the temperature sensor is electrically connected to the transmission mechanism.

[0061] The temperature sensor sends a signal when the preset alarm value is reached, and the signal is used to control the operation of the transmission mechanism. The operation of the transmission mechanism is used to simultaneously drive the closing mechanism and the spacing adjustment mechanism to operate. The operation of the spacing adjustment mechanism is used to control the main load interface 2 and the high-voltage connector 3 to approach or move away from each other. When the spacing adjustment mechanism operates to move the main load interface 2 and the high-voltage connector 3 away from each other to the maximum distance, the closing mechanism can simultaneously contact and fit the ports of the main load interface 2 and the high-voltage connector 3.

[0062] In this embodiment, by designing that the lithium battery pack 1 is divided into a main load area and a sub-load area, the main load area can realize driving power supply for the new energy vehicle, and the sub-load area can realize power supply for the equipment of the new energy vehicle, so as to meet the use effect of partitioned power supply. By setting a high-temperature power-off structure on the lithium battery pack 1 at the main load interface 2 connected to the main load area, the high-temperature power-off structure acts between the main load interface 2 and the high-voltage connector 3. When the temperature of the main load area on the lithium battery pack 1 rises due to overload and cannot be reduced in time, the high-temperature power-off structure can disconnect the connection between the main load interface 2 and the high-voltage connector 3, so that the high temperature generated by the lithium battery will not be transmitted to other equipment of the new energy vehicle along with the connecting cable, resulting in the shortening of the service life of other equipment due to the influence of high temperature. After the main load area is powered off, the sub-load area maintains power supply, which meets the short-term driving use of the new energy vehicle. The partitioned power supply is an existing disclosed technical means, which will not be described in detail here.

[0063] The temperature of the main load area is detected by a temperature sensor. When the temperature of the main load area rises and reaches the alarm value of the temperature sensor, the temperature sensor sends a signal to operate the transmission mechanism electrically connected thereto. The transmission mechanism can drive the spacing adjustment mechanism and the closing mechanism to operate. The spacing adjustment mechanism can control the distance between the main load interface 2 and the high-voltage connector 3 to move away or closer. When the main load interface 2 and the high-voltage connector 3 are close to each other, the closing mechanism is on one side of the main load interface 2 and the high-voltage connector 3. When the main load interface 2 and the high-voltage connector 3 are away from each other, the closing mechanism is between the main load interface 2 and the high-voltage connector 3. By design, the connection between the main load interface 2 and the high-voltage connector 3 can be disconnected, and the ports of the main load interface 2 and the high-voltage connector 3 can be closed by the closing mechanism to avoid arcing caused by exposure or external dust entering the ports, thereby improving the use effect.

[0064] As a further solution of the present invention, the spacing adjustment mechanism includes a symmetrically arranged scissor frame 4 and a connecting block 5 arranged on the scissor frame 4;

[0065] The upper and lower sides of the main load interface 2 are fixedly connected with rotating rods, and the upper and lower sides of the high-voltage connector 3 are also fixedly connected with rotating rods;

[0066] One end of the two scissor frames 4 is rotatably connected to the rotating rods fixedly connected at the upper and lower sides of the main load interface 2, and the other end of the two scissor frames 4 is rotatably connected to the rotating rods fixedly connected at the upper and lower sides of the high-voltage joint 3.

[0067] In this embodiment, when the distance between the two connecting blocks 5 on the scissors frame 4 is reduced, the scissors frame 4 will be extended and adjusted, and when the distance between the two connecting blocks 5 on the scissors frame 4 is increased, the scissors frame 4 will be shortened and adjusted. The two ends of the scissors frame 4 are rotatably connected to the main load interface 2 and the high-voltage connector 3 respectively. When the scissors frame 4 is extended and adjusted, since the scissors frame 4 is respectively connected to the main load interface 2 and the high-voltage connector 3, the distance between the main load interface 2 and the high-voltage connector 3 will be increased, and when the scissors frame 4 is shortened and adjusted, the distance between the main load interface 2 and the high-voltage connector 3 will be shortened. Through the coordinated design, the plug-in state of the main load interface 2 and the high-voltage connector 3 can be adjusted and controlled to meet the power-off use requirements.

[0068] As a further solution of the present invention, the transmission mechanism includes a synchronous adjustment component, a mounting frame 8 slidably connected to both ends of the synchronous adjustment component, and a linkage component fixedly connected to one end of the synchronous adjustment component, and the linkage component is connected to the driving mechanism;

[0069] The synchronous adjustment component includes a bidirectional screw 6 and a first limit head 7 fixedly connected to both ends of the bidirectional screw 6. The bidirectional screw 6 is threadedly connected to the connecting block 5. The bidirectional screw 6 is slidably connected in a sliding groove opened on the mounting frame 8. The mounting frame 8 is fixedly mounted on the outer shell of the lithium battery pack 1.

[0070] In this embodiment, when the driving mechanism is running, it can drive the linkage assembly and the synchronous adjustment assembly to move together. Since the bidirectional screw 6 is a bidirectional thread design, the connecting blocks 5 symmetrically arranged on the scissor frame 4 are threadedly connected to the two ends of the bidirectional screw 6. When the bidirectional screw 6 is rotated and adjusted, the connecting blocks 5 symmetrically connected on the bidirectional screw 6 can be made to approach or move away from each other, thereby realizing the telescopic adjustment of the scissor frame 4 through the rotation of the bidirectional screw 6 to meet the adjustment and use requirements. The two ends of the bidirectional screw 6 are slidably connected in the sliding groove opened on the mounting frame 8, and the two ends of the bidirectional screw 6 are fixedly connected with the first limit head 7. Through the sliding limit of the first limit head 7 on the mounting frame 8, it can be avoided that the bidirectional screw 6 makes the scissor frame 4 telescopic adjustment when the rotation adjustment is made, thereby forcing the bidirectional screw 6 to follow the connecting block 5 for horizontal adjustment. When the bidirectional screw 6 is adjusted horizontally, the first limit head 7 can contact the edge of the mounting frame 8 to limit the bidirectional screw 6 from being skewed in the sliding groove opened on the mounting frame 8, thereby meeting the adjustment effect.

[0071] As a further solution of the present invention, the linkage assembly includes a screw rod 9 fixedly connected to one of the first limit heads 7 and a transmission wheel 10 fixedly connected to the other end of the screw rod 9;

[0072] The screw rod 9 is connected to the telescopic assembly;

[0073] The telescopic assembly includes a first sliding frame 11 and a sliding rod 13 with one end fixedly connected to the first sliding frame 11, a sliding block 12 is slidably connected inside the guide groove opened on the first sliding frame 11, the sliding block 12 is threadedly connected to the screw rod 9, two connecting shafts 14 are fixedly connected to the sliding rod 13, and the sliding rod 13 is slidably connected to the mounting assembly.

[0074] In this embodiment, when the bidirectional screw 6 is rotated and adjusted, since the first limit head 7 fixedly connected to the bidirectional screw 6 is fixedly connected to the screw 9, the screw 9 and the bidirectional screw 6 will rotate and adjust synchronously, the screw 9 is threadedly connected to the sliding block 12, and the sliding block 12 is slidably connected in a guide groove opened on the lithium battery pack 1, and the guide groove limits the sliding block 12 to move and adjust only along the axial direction of the first sliding frame 11. Since the first sliding frame 11, the connecting shaft 14 and the sliding rod 13 are fixedly connected, when the screw 9 is rotated and adjusted, the sliding block 12 can only slide and adjust in the first sliding frame 11. After limiting the sliding direction of the sliding rod 13, the sliding rod 13 can only move and adjust along the limiting direction during adjustment, thereby ensuring the adjustment effect.

[0075] As a further solution of the present invention, the mounting assembly is mounted on the outer shell of the lithium battery pack 1, and the mounting assembly includes a support frame 15 and support rods 17 fixedly connected to the upper and lower sides of the support frame 15;

[0076] The support frame 15 is mounted on the outer shell of the lithium battery pack 1, and a movable groove 18 is provided on the support rod 17. Two second sliding frames 16 are symmetrically fixedly connected to the support frame 15 at one end of the movable groove 18. L-shaped sliding grooves 19 are symmetrically fixedly connected to both sides of the support rod 17. A slider is slidably connected in the transverse sliding groove provided in the second sliding frame 16, and the slider is rotatably connected to one end of the screw rod 9;

[0077] The support rod 17 is slidably connected to the sliding rod 13 , and the movable groove 18 is slidably connected to the connecting portion between the sliding rod 13 and the first sliding frame 11 .

[0078] In this embodiment, the support frame 15 is used for the installation of various components to ensure the installation effect of various components on the lithium battery pack 1. The support rod 17 is slidably plugged into the sliding rod 13. The support rod 17 limits the sliding rod 13, so that the sliding rod 13 can only slide and adjust along the track of the support rod 17 in the support rod 17. Therefore, when the screw rod 9 rotates, the sliding block 12 will slide and adjust in the first sliding frame 11. Since the sliding block 12 is adjusted and moved on the screw rod 9, it will force the first sliding frame 11 to move and adjust in the axial direction of the screw rod 9 to achieve the adjustment effect. The movable groove 18 is opened for sliding use at the connection part of the sliding rod 13 and the first sliding frame 11 to ensure the sliding adjustment effect.

[0079] As a further solution of the present invention, the driving mechanism includes a connecting rod 20 and a driving motor 21 mounted on the connecting rod 20, and both ends of the connecting rod 20 are slidably connected to two second sliding frames 16 respectively;

[0080] A driving wheel is coaxially fixed on the output shaft of the driving motor 21 . The driving wheel is connected to a transmission belt 22 . Both ends of the transmission belt 22 are transmission-connected to two transmission wheels 10 .

[0081] In this embodiment, when the driving motor 21 is running, it can drive the driving wheel to rotate. Since the driving wheel and the two transmission wheels 10 support and transmit the transmission belt 22 in an isosceles triangle, when the driving motor 21 is running, it can drive the two transmission wheels 10 to rotate synchronously at the same time, thereby achieving a driving effect.

[0082] As a further solution of the present invention, the closing mechanism includes a folding assembly and a closing plate assembly connected to the folding assembly;

[0083] The folding assembly includes a crank rod 23 and a rotating seat 24 rotatably connected to one end of the crank rod 23, wherein a limiting shaft is provided on one end of the crank rod 23 close to the closing plate assembly, and the limiting shaft is slidably connected in the L-shaped sliding groove 19, and the other end of the crank rod 23 is rotatably connected to the connecting shaft 14, and the rotating seat 24 is fixedly connected to the closing plate assembly.

[0084] In this embodiment, when the sliding rod 13 slides and adjusts inside the support rod 17, the connecting shaft 14 moves along with the sliding rod 13, and the two sides of the connecting shaft 14 are as follows. Fig.16 As shown, there are two crank rods 23 connected in a close rotation connection, and two crank rods 23 are arranged on the two connecting shafts 14. A limit shaft is arranged at one end of the crank rod 23 close to the first sliding frame 11 and close to the closing plate assembly. The limit shaft is slidably connected in the L-shaped sliding groove 19. When the sliding rod 13 is moved and adjusted, when the limit shaft slides to the bending part of the L-shaped sliding groove 19, it will move to the shorter end of the L-shaped sliding groove 19 under the resistance at the bending part of the L-shaped sliding groove 19, so that the crank rod 23, which was originally at an angle less than 90 degrees with the connecting shaft 14, can The principle is the same as the multi-link closing plate principle in the prior art, which will not be elaborated here. By making the angle between the crank rod 23 and the connecting shaft 14 ninety degrees, the closing plate assembly can be fitted between the ports of the main load interface 2 and the high-voltage connector 3, thereby achieving the closed use effect of the ports of the main load interface 2 and the high-voltage connector 3, and preventing the ports of the main load interface 2 and the high-voltage connector 3 from being exposed to generate arcs, or external dust from entering the ports of the main load interface 2 and the high-voltage connector 3, thereby achieving a good sealing effect after disconnection.

[0085] As a further solution of the present invention, the closing plate assembly includes a bottom plate 25 and a closing plate 26 disposed on one side of the bottom plate 25, and the four corners of the bottom plate 25 are fixedly connected to the rotating seat 24;

[0086] Four plug-in posts 27 are fixedly connected in a rectangular array on the closing plate 26 , a spring 28 is provided on the closing plate 26 at the center of the four plug-in posts 27 , one end of the spring 28 is fixedly connected to the closing plate 26 , and the other end of the spring 28 is fixedly connected to the bottom plate 25 .

[0087] In this embodiment, a spring 28 is arranged between the base plate 25 and the closing plate 26, so that when the crank rod 23 touches the base plate 25 to make it approach the ports of the main load interface 2 and the high-voltage connector 3, under the elastic force of the spring 28, the closing plate 26 will fit tightly against the ports of the main load interface 2 and the high-voltage connector 3, so that the ports can be closed and sealed after the main load interface 2 and the high-voltage connector 3 are disconnected, thereby avoiding the generation of electric arcs. At the same time, when the main load interface 2 and the high-voltage connector 3 are close to each other under the control of the spacing adjustment mechanism, a gap can be left to meet the use effect of the closing stroke. When the main load interface 2 and the high-voltage connector 3 are plugged in, the closing mechanism at this time will be on one side of the main load interface 2 and the high-voltage connector 3 under the adjustment of the transmission mechanism, and will not hinder the plugging and use of the main load interface 2 and the high-voltage connector 3, thereby ensuring the use effect.

[0088] The above embodiments are exemplary rather than restrictive, so the technical solutions of the present invention that can be implemented in other specific forms without departing from the spirit or basic features of the present invention are all included in the present invention.

Claims

1. A temperature control device for lithium batteries of new energy vehicles, comprising a lithium battery pack, wherein the lithium battery pack is divided into a main load area and a secondary load area, wherein the main load area on the lithium battery pack is connected to a main load interface, and the main load interface is movably connected to a high-voltage connector, wherein: A high-temperature power-off structure is provided between the main load interface and the high-voltage connector, and the high-temperature power-off structure is installed on the lithium battery pack; The high-temperature power-off structure includes a spacing adjustment mechanism connected to the main load interface and the high-voltage connector, a transmission mechanism connected to the spacing adjustment mechanism, and a closing mechanism connected to the transmission mechanism. The spacing adjustment mechanism is arranged on the lithium battery pack. A temperature sensor is arranged in the main load area inside the lithium battery pack. The temperature sensor is electrically connected to the transmission mechanism. When the temperature sensor reaches the preset alarm value, a signal is sent to drive the closing mechanism and the spacing adjustment mechanism to operate through the transmission mechanism, respectively controlling the main load interface and the high-voltage connector to move closer to or farther from each other, and when the main load interface and the high-voltage connector are away from each other to the maximum distance, the ports of the main load interface and the high-voltage connector are in contact with each other; The spacing adjustment mechanism includes a symmetrically arranged scissor frame and a connecting block arranged on the scissor frame; The upper and lower sides of the main load interface are fixedly connected with a rotating rod, and the upper and lower sides of the high-voltage connector are also fixedly connected with a rotating rod; One end of the two scissor frames is rotatably connected to the rotating rods fixedly connected at the upper and lower sides of the main load interface, and the other end of the two scissor frames is rotatably connected to the rotating rods fixedly connected at the upper and lower sides of the high-voltage joint; The closing mechanism includes a folding assembly and a closing plate assembly connected to the folding assembly; The folding assembly includes a crank rod and a rotating seat rotatably connected to one end of the crank rod, wherein a limiting shaft is provided on one end of one crank rod close to the closing plate assembly, the limiting shaft is slidably connected in the L-shaped sliding groove, the other end of the crank rod is rotatably connected to the connecting shaft, and the rotating seat is fixedly connected to the closing plate assembly.

2. A temperature control device for a lithium battery of a new energy vehicle according to claim 1, characterized in that: The transmission mechanism includes a synchronous adjustment component, a mounting frame slidably connected to both ends of the synchronous adjustment component, and a linkage component fixedly connected to one end of the synchronous adjustment component, and the linkage component is connected to the driving mechanism; The synchronous adjustment component includes a bidirectional screw and a first limit head fixedly connected to both ends of the bidirectional screw. The bidirectional screw is threadedly connected to the connecting block. The bidirectional screw is slidably connected in a sliding groove opened on the mounting frame. The mounting frame is fixedly mounted on the outer shell of the lithium battery pack.

3. A temperature control device for a lithium battery of a new energy vehicle according to claim 2, characterized in that: The linkage assembly includes a screw rod fixedly connected to one of the first limit heads and a transmission wheel fixedly connected to the other end of the screw rod; The lead screw is connected with the telescopic assembly.

4. A temperature control device for a lithium battery of a new energy vehicle according to claim 3, characterized in that: The telescopic component includes a first sliding frame and a sliding rod with one end fixedly connected to the first sliding frame. A sliding block is slidably connected inside a guide groove opened on the first sliding frame. The sliding block is threadedly connected to the screw rod. Two connecting shafts are fixedly connected to the sliding rod. The sliding rod is slidably connected to the mounting component.

5. A temperature control device for a lithium battery of a new energy vehicle according to claim 4, characterized in that: The mounting assembly is mounted on the outer shell of the lithium battery pack, and the mounting assembly includes a support frame and support rods fixedly connected to the upper and lower sides of the support frame; The support frame is installed on the shell of the lithium battery pack, and a movable groove is provided on the support rod. Two second sliding frames are symmetrically fixedly connected to the support frame at one end of the movable groove. L-shaped sliding grooves are symmetrically fixedly connected on both sides of the support rod. A slider is slidably connected in the transverse sliding groove provided in the second sliding frame, and the slider is rotatably connected to one end of the screw rod; The support rod is slidably connected to the sliding rod, and the movable groove is slidably connected to the connecting portion of the sliding rod and the first sliding frame.

6. A temperature control device for a lithium battery of a new energy vehicle according to claim 2, characterized in that: The driving mechanism includes a connecting rod and a driving motor mounted on the connecting rod, and two ends of the connecting rod are respectively slidably connected to the two second sliding frames; A driving wheel is coaxially fixed on the output shaft of the driving motor. The driving wheel is connected to a transmission belt, and two ends of the transmission belt are drivingly connected to two driving wheels.

7. A temperature control device for a lithium battery of a new energy vehicle according to claim 1, characterized in that: The closing plate assembly includes a bottom plate and a closing plate arranged on one side of the bottom plate, and the four corners of the bottom plate are fixedly connected to the rotating seat; Four plug-in columns are fixedly connected to the closed plate in a rectangular array, a spring is arranged on the closed plate at the center of the four plug-in columns, one end of the spring is fixedly connected to the closed plate, and the other end of the spring is fixedly connected to the bottom plate.

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