A lithium battery heating and insulation device that meets the requirements of cold start of electric buses

Abstract

The present invention relates to a lithium battery heating and heat preservation device, and in particular to a lithium battery heating and heat preservation device that meets the cold start of an electric bus, including an electric bus, a frame, a driving mechanism, etc. The frame is fixedly connected to the right side of the chassis of the electric bus, and the front and rear sides of the frame are open, and the driving mechanism is installed in the frame. When the electric bus is running, the driving mechanism can be started to drive the hollow frame to move outward, and the hollow frame moves outward without covering the lithium battery. Then, when the electric bus stops running, the driving mechanism can be started to drive the hollow frame to move inward and reset, and the hollow frame resets to cover part of the heat, thereby keeping the lithium battery warm. In this way, the low temperature of the lithium battery can be avoided to affect the cruising range of the electric bus.

Description

Technical Field

[0001] The invention relates to a lithium battery heating and heat preservation device, in particular to a lithium battery heating and heat preservation device that meets the requirements of cold starting of an electric bus. Background Art

[0002] In the manufacturing process of electric buses, a large number of parts are generally required, and the use of lithium batteries is indispensable. Lithium batteries can provide power for electric buses. At present, when electric buses use lithium batteries in low temperature environments, the lithium batteries are also affected by the low temperature environment and become low temperature, resulting in the lithium batteries not being fully charged, causing the capacity of the lithium batteries to decrease, which seriously affects the range of the electric buses.

[0003] Therefore, it is necessary to design and develop a lithium battery heating and insulation device that can keep the lithium battery warm so that it is always at the optimal temperature and does not affect the cruising range of the electric bus to meet the cold start requirements of the electric bus. Summary of the invention

[0004] In order to overcome the disadvantage that lithium batteries are affected by low temperature environment and become low temperature, resulting in the phenomenon that the lithium batteries are not fully charged during charging, which seriously affects the cruising range of the electric bus, the present invention provides a lithium battery heating and insulation device that can keep the lithium battery warm so that the lithium battery is always at an optimal temperature and does not affect the cruising range of the electric bus, thereby meeting the requirements of cold start of the electric bus.

[0005] The present invention is achieved through the following technical approaches:

[0006] A lithium battery heating and heat preservation device that meets the cold start requirements of an electric bus comprises an electric bus, a frame, a hollow frame, a driving mechanism and a placement mechanism. The frame is fixedly connected to the right side of a chassis of the electric bus, and the front and rear sides of the frame are open. The driving mechanism is installed in the frame, and two hollow frames for heat preservation of lithium batteries are installed on the driving mechanism. A placement mechanism for lithium battery installation is installed in the middle of the frame.

[0007] Optionally, the driving mechanism includes a driving motor, a screw, a nut and a fixing plate. A fixing plate is fixedly connected between the upper right parts of the front and rear side surfaces in the frame. A screw is symmetrically rotatably connected to the fixing plate. The threads on the left and right sides of the screw are opposite. Nuts for driving the hollow frame to move are rotatably mounted on the left and right sides of the screw through threads. The four nuts on the left are respectively fixedly connected to the front and rear side surfaces outside the left hollow frame, and the four nuts on the right are respectively fixedly connected to the front and rear side surfaces outside the right hollow frame. A driving motor is fixedly connected to the left sides of the upper front and rear side surfaces in the frame, and the output shaft end of the driving motor is fixedly connected to the left end of the screw.

[0008] Optionally, the placement mechanism includes hollow blocks, a placement rack and baffle rods, four hollow blocks are evenly spaced and fixed in the middle of the bottom of the frame, a placement rack for placing lithium batteries is fixed between the tops of the four hollow blocks, and forty-eight baffle rods are evenly spaced and fixed between the top and bottom of the placement rack.

[0009] Optionally, a heat dissipation mechanism for dissipating heat from a lithium battery is also included, the heat dissipation mechanism including a swinging plate, a return plate, a half gear, an L-shaped slider, a first spring and a rack, twenty-one swinging plates are rotatably connected at even intervals between the inner top and the inner bottom on the front and rear sides of the frame, the swinging plates are in contact with each other, half gears are fixedly connected to the upper and lower sides of the right side surface of the swinging plate, ten L-shaped sliders are slidably connected at even intervals on the upper parts of the front and rear side surfaces of the frame, a first spring is connected between the upper part of the right side surface of the rightmost L-shaped slider and the inner side of the frame, a return plate is fixedly connected between the bottom ends of all the L-shaped sliders on each side, the left hollow frame can contact the return plate, and ten racks for driving the half gears to rotate outward are fixedly connected at even intervals on the upper and lower sides of the outer sides of the return plates on the front and rear sides, and the racks are meshed with the half gears.

[0010] Optionally, an exhaust mechanism for dissipating heat in the frame is also included, the exhaust mechanism including a guide plate, a circular mounting plate, an exhaust fan, a connecting block, a guide block and a guide rod. The lower parts of the front and rear sides of the frame are symmetrically and slidingly connected with guide blocks, the inner ends of the four guide blocks are fixedly connected to connecting blocks, a circular mounting plate is fixedly connected between the inner ends of the two front connecting blocks and between the inner ends of the two rear connecting blocks, nine exhaust fans for extracting hot air from the frame are evenly installed between the top and the inner bottom of the circular mounting plate, guide rods are fixedly connected to the upper left parts of the inner sides of the circular mounting plates on the front and rear sides, guide plates for driving the guide rods to move are fixedly connected to the lower parts of the front and rear sides outside the hollow frame, and the inner ends of the guide rods are located in the guide plates.

[0011] Optionally, it also includes a closing mechanism for closing the two hollow frames, the closing mechanism includes a driving plate, a fixed bar, a hollow plate, a second spring and a contact rod, a hollow plate for closing the two hollow frames is slidably mounted between the four hollow blocks, the hollow plate is located between the two hollow frames, four second springs are evenly spaced and connected between the outer bottom of the hollow plate and the inner bottom of the frame, a contact rod is fixedly connected to the left side of the outer bottom of the hollow plate, a fixed bar is fixedly connected to the left side of the outer bottom of the left hollow frame, a driving plate for driving the hollow plate to move is symmetrically fixedly connected to the front and rear of the right side of the fixed bar, and the front and rear ends of the contact rod are respectively located in the front and rear driving plates.

[0012] Optionally, it also includes an n-shaped rod, a brush and a third spring. Slide grooves are symmetrically opened on the front and rear sides of the bottom of the frame body. An n-shaped rod is slidably connected between the two front slide grooves and between the two rear slide grooves. Brushes for removing impurities on the exhaust fan are installed on the upper parts of the outer sides of the front and rear n-shaped rods. The third springs are fixedly connected to the left and right sides of the lower parts of the inner sides of the front and rear n-shaped rods, and the tail end of the third spring is fixedly connected to the inner side of the slide groove.

[0013] Optionally, it also includes bumps and trigger rods, and five bumps are evenly spaced and fixedly connected to the left and right sides of the outer side surfaces of the front and rear n-shaped rods, and trigger rods for driving the bumps to move inward are fixedly connected to the outer sides of the inner side surfaces of the front and rear connecting blocks, and the tail end of the trigger rod is in contact with the bump.

[0014] Compared with the prior art, the present invention has the following significant improvements:

[0015] 1. When the electric bus is running, the driving mechanism can be started to drive the hollow frame to move outward. The hollow frame moves outward without covering the lithium battery. Then, when the electric bus stops running, the driving mechanism can be started to drive the hollow frame to move inward and reset. The hollow frame resets to cover part of the heat, thereby keeping the lithium battery warm. In this way, the lithium battery can be prevented from being in a low temperature state and affecting the cruising range of the electric bus.

[0016] 2. When the electric bus is running, the heat dissipation mechanism can remove the heat in the frame, which is to dissipate the heat of the lithium battery. In this way, it can avoid the damage of the lithium battery caused by excessively high temperature and affect the use of the electric bus.

[0017] 3. Under the action of the discharge mechanism, the heat in the frame can be removed when the electric bus is running. In this way, the lithium battery can be further cooled to avoid excessive heat in the frame causing the lithium battery temperature to be too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 There is also a new type of cross-sectional structural schematic diagram.

[0020] Figure 3 It is a schematic diagram of a first partial three-dimensional structure of the present invention.

[0021] Figure 4 It is a schematic diagram of a first partial cross-sectional structure of the present invention.

[0022] Figure 5 It is a schematic diagram of a second partial three-dimensional structure of the present invention.

[0023] Figure 6 It is a schematic diagram of a second partial cross-sectional structure of the present invention.

[0024] Figure 7 It is a schematic diagram of a third partial cross-sectional structure of the present invention.

[0025] Figure 8 It is a schematic diagram of a fourth partial cross-sectional structure of the present invention.

[0026] Fig. 9 It is a schematic diagram of a fifth partial cross-sectional structure of the present invention.

[0027] Fig.10 It is an enlarged schematic diagram of part A of the present invention.

[0028] Fig.11 It is a schematic diagram of a sixth partial cross-sectional structure of the present invention.

[0029] Fig.12 It is a schematic diagram of a seventh partial cross-sectional structure of the present invention.

[0030] Fig.13 It is an enlarged schematic diagram of part B of the present invention.

[0031] Fig.14 It is a schematic diagram of the three-dimensional structure of the swing plate of the present invention.

[0032] Fig.15 It is a schematic diagram of a third partial three-dimensional structure of the present invention.

[0033] Fig.16 It is a schematic diagram of the eighth partial cross-sectional structure of the present invention.

[0034] Fig.17 It is a schematic diagram of a fourth partial three-dimensional structure of the present invention.

[0035] Fig.18 It is a ninth partial cross-sectional structural schematic diagram of the present invention.

[0036] Fig.19 It is an enlarged schematic diagram of part C of the present invention.

[0037] Fig. 20 It is an enlarged schematic diagram of part D of the present invention.

[0038] Names of the numbers in the figure: 1. electric bus, 3. frame, 4. hollow frame, 5. driving mechanism, 51. driving motor, 52. screw rod, 53. nut, 54. fixing plate, 6. placing mechanism, 61. hollow block, 62. placing frame, 63. blocking rod, 7. lithium battery, 8. heat dissipation mechanism, 81. swing plate, 82. return plate, 83. half gear, 84. L-shaped slider, 85. first spring, 86. rack, 9. exhaust mechanism, 91. guide plate, 92. return mounting plate, 93. exhaust fan, 94. connecting block, 95. guide block, 96. guide rod, 10. closing mechanism, 101. driving plate, 102. fixing bar, 103. hollow plate, 104. second spring, 105. contact rod, 11. n-type rod, 12. brush, 13. slide groove, 14. third spring, 15. bump, 16. trigger rod. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings, and embodiments of the present invention are given in conjunction with the accompanying drawings.

[0040] Embodiment: A lithium battery heating and heat preservation device that meets the requirements of cold starting of electric buses.

[0041] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 8 As shown, it includes an electric bus 1, a frame 3, a hollow frame 4, a driving mechanism 5 and a placement mechanism 6. The frame 3 is fixedly connected to the right side of the chassis of the electric bus 1 by welding. The front and rear sides of the frame 3 are open. The driving mechanism 5 is installed in the frame 3. Two hollow frames 4 are installed on the driving mechanism 5. When the electric bus 1 stops running, the hollow frame 4 can keep the lithium battery 7 warm. The placement mechanism 6 is installed in the middle of the frame 3, and the operator can install the lithium battery 7 on the placement mechanism 6.

[0042] The driving mechanism 5 includes a driving motor 51, a screw rod 52, a nut 53 and a fixing plate 54. The fixing plate 54 is installed between the upper right parts of the front and rear side surfaces in the frame 3 by welding. The screw rod 52 is symmetrically rotatably connected to the fixing plate 54. The threads on the left and right sides of the screw rod 52 are opposite. The nuts 53 are rotatably mounted on the left and right sides of the screw rod 52 by threads. The four nuts 53 on the left side are respectively installed on the front and rear side surfaces outside the left hollow frame 4 by welding. The four nuts 53 on the right side are respectively installed on the front and rear side surfaces outside the right hollow frame 4 by welding. When the nuts 53 move inwards and outwards, the nuts 53 can drive the hollow frame 4 to move inwards and outwards. The driving motor 51 is installed on the left side of the upper left side of the front and rear side surfaces in the frame 3 by bolt connection. The output shaft end of the driving motor 51 is fixedly connected to the left end of the screw rod 52.

[0043] The placement mechanism 6 includes a hollow block 61, a placement rack 62 and a baffle rod 63. Four hollow blocks 61 are evenly spaced and installed in the middle of the bottom of the frame 3 by welding. A placement rack 62 is fixed between the tops of the four hollow blocks 61. The operator can place the lithium battery 7 in the placement rack 62 for installation. Forty-eight baffle rods 63 are evenly spaced and fixed between the top and the bottom of the placement rack 62 by welding.

[0044] Initially, a lithium battery 7 is installed in the placement mechanism 6. When the electric bus 1 starts to travel, the driving mechanism 5 can be started. The driving mechanism 5 drives the hollow frame 4 to move outward. The hollow frame 4 moves outward without covering the lithium battery 7. When the hollow frame 4 moves outward to a suitable position, the driving mechanism 5 is turned off. The driving mechanism 5 stops driving the hollow frame 4 to move outward, and then the electric bus 1 can be powered by the lithium battery 7 during travel, and the lithium battery 7 will emit heat. When the electric bus 1 stops traveling, the driving mechanism 5 can be started. The driving mechanism 5 drives the hollow frame 4 to move inward and reset. The hollow frame 4 moves inward and resets to cover the lithium battery 7, which also covers part of the heat to avoid heat loss, so that the lithium battery 7 is always at the best heating temperature, and the driving mechanism 5 is turned off. When the electric bus 1 needs to be started, the electric bus 1 can be directly started, and the lithium battery 7 energizes the electric bus 1. In this way, the lithium battery 7 can be prevented from having a low cruising range due to low temperature.

[0045] When the electric bus 1 is started, the drive motor 51 can be started to rotate forward, and the drive motor 51 rotates forward to drive the screw rod 52 to rotate forward, and the screw rod 52 rotates forward to drive the nuts 53 on the left and right sides to move outward, and the nuts 53 move outward to drive the hollow frame 4 to move outward, and the hollow frame 4 moves outward without covering the lithium battery 7. When the hollow frame 4 moves outward to a suitable position, the drive motor 51 is turned off, so that the hollow frame 4 can be prevented from affecting the heat dissipation of the lithium battery 7. When the electric bus 1 stops running, the drive motor 51 can be started to reverse, and the drive motor 51 reverses to drive the screw rod 52 to reverse, and the screw rod 52 reverses to drive the nuts 53 on the left and right sides to move inward and reset, and the nuts 53 reset to drive the hollow frame 4 to move inward and reset, and the hollow frame 4 resets to cover the lithium battery 7. At the same time, the hollow frame 4 covers part of the heat to keep the lithium battery 7 warm, and the drive motor 51 is turned off.

[0046] When the electric bus 1 is running, the lithium battery 7 is mounted on the placement rack 62 , and the blocking rod 63 can further limit the position of the lithium battery 7 . Moreover, due to the spacing design of the blocking rod 63 , the heat dissipation of the lithium battery 7 is not affected.

[0047] Reference Figure 1-Figure 20As shown, a heat dissipation mechanism 8 is also included, and the heat dissipation mechanism 8 includes a swing plate 81, a return plate 82, a half gear 83, an L-shaped slider 84, a first spring 85 and a rack 86. Twenty-one swing plates 81 are evenly spaced and rotatably connected between the top and the bottom of the front and rear sides of the frame 3. The swing plates 81 are in contact with each other. The half gears 83 are installed on the upper and lower sides of the right side of the swing plate 81 by welding. Ten L-shaped sliders 84 are evenly spaced and slidably connected on the upper parts of the front and rear sides of the frame 3. The rightmost L-shaped slider 84 is on the right side. A first spring 85 is connected between the upper part of the side surface and the inner side of the frame 3, and a return plate 82 is installed between the bottom ends of all the L-shaped sliders 84 on each side by welding. When the left hollow frame 4 moves outward and contacts the return plate 82, the left hollow frame 4 can drive the return plate 82 to move leftward. Ten racks 86 are evenly spaced and fixedly connected to the upper and lower sides of the outer side surfaces of the return plates 82 on the front and rear sides. The rack 86 is meshed with the half gear 83. When the return plate 82 drives the rack 86 to move leftward, the rack 86 can drive the half gear 83 to rotate outward.

[0048] The exhaust mechanism 9 also includes a guide plate 91, a return-shaped mounting plate 92, an exhaust fan 93, a connecting block 94, a guide block 95 and a guide rod 96. The lower parts of the front and rear sides of the frame 3 are symmetrically and slidingly connected with guide blocks 95. The inner ends of the four guide blocks 95 are all installed with connecting blocks 94 by welding. The return-shaped mounting plate 92 is fixedly connected between the inner ends of the two front connecting blocks 94 and the inner ends of the two rear connecting blocks 94. The top of the return-shaped mounting plate 92 Nine exhaust fans 93 are evenly installed between the top and the inner bottom. When the exhaust fans 93 are started, the exhaust fans 93 can draw out the hot air in the frame 3. Guide rods 96 are installed on the left side of the upper inner side surfaces of the front and rear circular mounting plates 92 by welding. Guide plates 91 are fixedly connected to the lower parts of the front and rear outer side surfaces of the hollow frame 4. The inner ends of the guide rods 96 are located in the guide plates 91. When the guide plates 91 move outward, the guide plates 91 can drive the guide rods 96 to move upward.

[0049] It also includes a closing mechanism 10, which includes a driving plate 101, a fixing bar 102, a hollow plate 103, a second spring 104 and a contact rod 105. The hollow plate 103 is slidably mounted between the four hollow blocks 61, and the hollow plate 103 is located between the two hollow frames 4. The hollow plate 103 is used to close the two hollow frames 4. Four second springs 104 are evenly spaced and connected between the outer bottom of the hollow plate 103 and the inner bottom of the frame 3. The contact rod 105 is installed on the left side of the outer bottom of the hollow plate 103 by welding. The fixing bar 102 is installed on the left side of the outer bottom of the left hollow frame 4 by welding. The driving plate 101 is symmetrically fixed to the front and rear of the right side of the fixing bar 102. The front and rear ends of the contact rod 105 are respectively located in the front and rear driving plates 101. When the driving plate 101 moves outward, the driving plate 101 can drive the contact rod 105 to move downward, thereby causing the hollow plate 103 to move downward.

[0050] When the driving motor 51 starts to rotate forward, the nut 53 drives the hollow frame 4 to move outward. When the left hollow frame 4 moves outward and contacts the return plate 82, the left hollow frame 4 can drive the return plate 82 to move left. The return plate 82 moves left and drives the L-shaped slider 84 to move left. The first spring 85 is stretched, and the return plate 82 moves left and also drives the rack 86 to move left. The rack 86 moves left and drives the half gear 83 to rotate outward. The half gear 83 rotates outward and drives the swing plate 81 to swing outward. When the left hollow frame 4 stops moving to the left, the left hollow frame 4 stops driving the return plate 82 to move left, and the swing plate 81 stops swinging outward. When the electric bus 1 is traveling, a pressure difference is generated between the frame 3 and the outside world. Since the outside air flow rate is greater than that in the frame 3, the outside air pressure is less than that in the frame 3. The heat in the frame 3 is continuously discharged through the swing plate 81, so the lithium battery 7 can be cooled to avoid damage caused by excessive temperature of the lithium battery 7. When the electric bus 1 stops running, the driving motor 51 is started to reverse, the nut 53 drives the hollow frame 4 to move inward and reset, the hollow frame 4 moves inward and resets to disengage from the return plate 82, due to the action of the first spring 85, the L-shaped slider 84 moves rightward and resets, driving the return plate 82 to move rightward and reset, the return plate 82 moves rightward and resets, driving the rack 86 to move rightward and reset, the rack 86 moves rightward and resets, driving the half gear 83 to rotate inward and reset, the half gear 83 rotates inward and resets, driving the swing plate 81 to swing inward and reset, and the swing plate 81 swings inward and resets to close the open part of the frame 3. In this way, the lithium battery 7 can be cooled to prevent the lithium battery 7 from being damaged due to excessive temperature and affecting the use of the electric bus 1.

[0051] When the hollow frame 4 moves outward, the hollow frame 4 also drives the guide plate 91 to move outward, the guide plate 91 moves outward to drive the guide rod 96 to move upward, the guide rod 96 moves upward to drive the return-shaped mounting plate 92 to move upward, the connecting block 94 and the guide block 95 play a guiding role, the return-shaped mounting plate 92 moves upward to drive the exhaust fan 93 to move upward, and when the guide plate 91 moves outward to make the guide rod 96 contact the horizontal position, the guide plate 91 stops driving the guide rod 96 to move upward, the guide rod 96 stops driving the return-shaped mounting plate 92 to move upward, and the exhaust fan 93 also stops moving upward , the exhaust fan 93 corresponds to the swing plate 81, and the exhaust fan 93 can be started. The exhaust fan 93 starts to discharge the heat in the frame 3, which further dissipates the heat of the lithium battery 7. When the hollow frame 4 moves inward and resets, the exhaust fan 93 is turned off, and the exhaust fan 93 stops discharging the heat in the frame 3. The hollow frame 4 drives the guide plate 91 to move inward and reset, and the guide plate 91 resets and drives the guide rod 96 to move downward and reset. The guide rod 96 moves downward and resets and drives the return-shaped mounting plate 92 to move downward and reset. The return-shaped mounting plate 92 moves downward and resets and drives the exhaust fan 93 to move downward and reset. In this way, the lithium battery 7 can be further cooled to prevent the heat in the frame 3 from being too high, resulting in the over-high temperature of the lithium battery 7.

[0052] When the left hollow frame 4 moves outward, the left hollow frame 4 also drives the fixing bar 102 to move outward, and the fixing bar 102 moves outward to drive the driving plate 101 to move outward. When the driving plate 101 moves outward so that the inclined surface thereon contacts the contact rod 105, the driving plate 101 drives the contact rod 105 to move downward, and the contact rod 105 moves downward to drive the hollow plate 103 to move downward, the second spring 104 is compressed, and the hollow plate 103 moves downward to break away from the hollow frame 4, and then the contact rod 105 moves downward to the horizontal position of the guide plate 91. When the contact is made, the contact rod 105 stops moving downward, and the hollow plate 103 also stops moving downward. When the left hollow frame 4 moves inward to reset, the left hollow frame 4 drives the driving plate 101 to move inward to reset through the fixing bar 102. The reset of the driving plate 101 drives the contact rod 105 to move upward to reset. The upward movement of the contact rod 105 drives the hollow plate 103 to move upward to reset. Due to the action of the second spring 104, the hollow plate 103 moves upward to reset better. The upward movement of the hollow plate 103 seals the two hollow frames 4. In this way, it can prevent some heat from floating out from below to affect the heat preservation of the lithium battery 7.

[0053] Reference Figure 4 , Figure 6 , Fig.16 , Fig.18 and Fig.19As shown, it also includes an n-shaped rod 11, a brush 12 and a third spring 14. Slide grooves 13 are symmetrically opened on the front and rear sides of the bottom of the frame 3. The n-shaped rod 11 is slidably connected between the two front slide grooves 13 and the two rear slide grooves 13. Brushes 12 are installed on the upper parts of the outer sides of the n-shaped rods 11 on the front and rear sides. When the exhaust fan 93 contacts the brush 12, the brush 12 can remove impurities on the exhaust fan 93. The third spring 14 is installed on both sides of the lower part of the inner side surface of the n-shaped rods 11 on the front and rear sides by welding. The tail end of the third spring 14 is fixedly connected to the inner side of the slide groove 13.

[0054] It also includes a protrusion 15 and a trigger rod 16. Five protrusions 15 are evenly spaced and installed on the left and right sides of the outer side surfaces of the n-shaped rods 11 on the front and rear sides by welding. The trigger rods 16 are fixedly connected to the outer sides of the inner sides of the connecting blocks 94 on the front and rear sides. The tail end of the trigger rod 16 is in contact with the protrusion 15. When the trigger rod 16 moves up and down, the trigger rod 16 can drive the protrusion 15 to move inward.

[0055] When the exhaust fan 93 moves upward, the exhaust fan 93 contacts the brush 12. Due to the action of the third spring 14, the brush 12 can contact the exhaust fan 93 more closely. When the exhaust fan 93 continues to move upward, the brush 12 removes impurities on the exhaust fan 93. Similarly, when the exhaust fan 93 moves downward, the brush 12 can again remove impurities on the exhaust fan 93. In this way, a large amount of impurities on the exhaust fan 93 can be avoided to affect subsequent use.

[0056] When the return-shaped mounting plate 92 drives the exhaust fan 93 to move upward, the connection block 94 moves upward and also drives the trigger rod 16 to move upward. When the trigger rod 16 moves upward and contacts the protrusion 15, the trigger rod 16 drives the protrusion 15 to move inward. The protrusion 15 moves inward and drives the n-shaped rod 11 to move inward. The third spring 14 is compressed, and the n-shaped rod 11 moves inward and drives the brush 12 to move inward. When the trigger rod 16 continues to move upward and disengages from the protrusion 15, due to the action of the third spring 14, the n-shaped rod 11 moves outward and drives the protrusion 15 to move outward and reset, and the n-shaped rod 11 also drives the brush 12 to move outward and reset. This is repeated, so that the brush 12 can continuously move inward and outward. The brush 12 moves inward and outward to better remove impurities on the exhaust fan 93. Similarly, when the return-shaped mounting plate 92 drives the exhaust fan 93 to move downward, the connection block 94 drives the trigger rod 16 to move downward, so that the brush 12 continues to move inward and outward to remove impurities on the exhaust fan 93. In this way, impurities in the exhaust fan 93 can be removed more cleanly.

[0057] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A lithium battery heating and heat preservation device for an electric bus that meets the requirements of cold starting, comprising an electric bus (1), a frame (3) and a hollow frame (4), wherein the frame (3) is fixedly connected to the right side of the chassis of the electric bus (1), the front and rear sides of the frame (3) are open, and two hollow frames (4) for heat preservation of lithium batteries (7) are arranged in the frame (3), and the device is characterized in that it also comprises a driving mechanism (5) and a placement mechanism (6), wherein the driving mechanism (5) is installed in the frame (3), the driving mechanism (5) is connected to the two hollow frames (4), and a placement mechanism (6) for installing lithium batteries (7) is installed in the middle of the frame (3). The driving mechanism (5) comprises a driving motor (51), a screw rod (52), a nut (53) and a fixing plate (54). The fixing plate (54) is fixedly connected between the upper right sides of the front and rear side surfaces of the frame body (3). The screw rod (52) is symmetrically rotatably connected to the fixing plate (54). The screw rod (52) has opposite threads on the left and right sides. The screw rod (52) is rotatably mounted on the left and right sides of the screw rod (52) through threads. The nuts (53) for driving the hollow frame (4) to move are respectively fixedly connected to the front and rear side surfaces of the left hollow frame (4). The four nuts (53) on the left are respectively fixedly connected to the front and rear side surfaces of the left hollow frame (4). The front and rear side surfaces are fixedly connected, and the left sides of the upper parts of the front and rear side surfaces of the frame (3) are fixedly connected to a driving motor (51), and the output shaft end of the driving motor (51) is fixedly connected to the left end of the screw rod (52); and a heat dissipation mechanism (8) for dissipating heat from the lithium battery is also included, and the heat dissipation mechanism (8) includes a swing plate (81), a return plate (82), a half gear (83), an L-shaped slider (84), a first spring (85) and a rack (86). Twenty-one swing plates (81) are evenly spaced and rotatably connected between the top and bottom of the front and rear sides of the frame (3), and the swing plates (81) are in contact with each other. The right side of the swing plate (81) Half gears (83) are fixedly connected to the upper and lower sides of the side surface, and ten L-shaped sliders (84) are evenly spaced and slidably connected to the upper parts of the front and rear side surfaces of the frame (3). A first spring (85) is connected between the upper part of the right side surface of the rightmost L-shaped slider (84) and the inner side of the frame (3). A return plate (82) is fixedly connected between the bottom ends of all the L-shaped sliders (84) on each side, and the left hollow frame (4) can contact the return plate (82). Ten racks (86) for driving the half gears (83) to rotate outward are evenly spaced and fixedly connected to the upper and lower sides of the outer side surfaces of the return plates (82) on the front and rear sides, and the racks (86) are meshed with the half gears (83);The invention also comprises a closing mechanism (10) for closing the inside of the two hollow frames (4). The closing mechanism (10) comprises a driving plate (101), a fixing bar (102), a hollow plate (103), a second spring (104) and a contact rod (105). The hollow plate (103) for closing the inside of the two hollow frames (4) is slidably mounted between the four hollow blocks (61). The hollow plate (103) is located between the two hollow frames (4). Four second springs (104) are evenly spaced and connected between the outer bottom of the hollow plate (103) and the inner bottom of the frame body (3). The contact rod (105) is fixedly connected to the left side of the outer bottom of the hollow plate (103). The fixing bar (102) is fixedly connected to the left side of the outer bottom of the left hollow frame (4). The driving plate (101) for driving the hollow plate (103) to move is fixedly connected to the right side of the fixing bar (102) in a front-rear symmetrical manner. The front and rear ends of the contact rod (105) are respectively located in the front and rear driving plates (101) on the front and rear sides. ; 2. A lithium battery heating and heat preservation device for electric bus cold start according to claim 1, characterized in that: The placement mechanism (6) comprises a hollow block (61), a placement rack (62) and a blocking rod (63). Four hollow blocks (61) are fixedly connected at even intervals in the middle of the bottom of the frame (3). A placement rack (62) for placing lithium batteries (7) is fixedly connected between the tops of the four hollow blocks (61). Forty-eight blocking rods (63) are fixedly connected at even intervals between the top and bottom of the placement rack (62).

3. A lithium battery heating and heat preservation device for electric bus cold start according to claim 1, characterized in that: The frame (3) further comprises an exhaust mechanism (9) for dissipating heat in the frame (3), the exhaust mechanism (9) comprising a guide plate (91), a return-shaped mounting plate (92), an exhaust fan (93), a connecting block (94), a guide block (95) and a guide rod (96), the guide blocks (95) being symmetrically slidably connected to the lower portions of both front and rear sides of the frame (3), the inner ends of the four guide blocks (95) being fixedly connected to the connecting blocks (94), the inner ends of the two connecting blocks (94) on the front side being connected to the inner ends of the two connecting blocks (94) on the rear side being connected to the guide blocks (95) on the left and right sides. ) are fixedly connected between the inner ends of the hollow frame (4), nine exhaust fans (93) for extracting hot air from the frame (3) are evenly spaced between the top and bottom of the hollow frame (92), guide rods (96) are fixedly connected to the left upper parts of the inner sides of the hollow frame (4), and guide plates (91) for driving the guide rods (96) to move are fixedly connected to the lower parts of the front and rear sides of the hollow frame (4), and the inner ends of the guide rods (96) are located inside the guide plates (91).

4. A lithium battery heating and heat preservation device for electric bus cold start according to claim 1, characterized in that: It also includes an n-shaped rod (11), a brush (12) and a third spring (14); the frame (3) has slide grooves (13) symmetrically formed on both the front and rear sides of the inner bottom; the n-shaped rod (11) is slidably connected between the two front slide grooves (13) and between the two rear slide grooves (13); brushes (12) for removing impurities on the exhaust fan (93) are installed on the upper parts of the outer surfaces of the front and rear n-shaped rods (11); the third springs (14) are fixedly connected on both the left and right sides of the lower parts of the inner side surfaces of the front and rear n-shaped rods (11); and the tail end of the third spring (14) is fixedly connected to the inner side of the slide groove (13).

5. A lithium battery heating and heat preservation device for electric bus cold start according to claim 4, characterized in that: It also includes a protrusion (15) and a trigger rod (16), five protrusions (15) are evenly spaced and fixedly connected to the left and right sides of the outer side surfaces of the front and rear n-shaped rods (11), and the trigger rod (16) for driving the protrusion (15) to move inward is fixedly connected to the outer side of the inner side surfaces of the front and rear connecting blocks (94), and the rear end of the trigger rod (16) is in contact with the protrusion (15).

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