A lithium battery management system with automatic coding addressing

Abstract

The present invention discloses a lithium battery management system with automatic coding addressing, which belongs to the field of new energy. A lithium battery management system with automatic coding addressing comprises a casing; a plurality of battery packs and a control system are arranged vertically in the casing; the battery pack comprises a rectangular lithium battery fixed in the casing, and a hollow heat sink fixed at the upper and lower ends of the lithium battery; each lithium battery is connected in parallel. The control system assigns a different address to each battery pack; the heat sink is evenly provided with air outlets at one end facing the lithium battery, and an air inlet at one end facing the center of the casing; the battery pack also comprises a wind shield for changing the air intake of the air inlet. This solution changes the air volume entering the heat sink by moving the wind shield, and then provides targeted air volume according to the current heat generation of the lithium battery, thereby reducing the waste of wind power.

Description

Technical Field

[0001] The present invention belongs to the field of new energy, and more specifically, relates to a lithium battery management system with automatic coding addressing. Background Art

[0002] Generally, when multiple battery packs are used in parallel, each parallel battery pack has a physical address, which is currently achieved by using a dip switch. In this way, when there are many parallel battery packs, each group must set a corresponding address, which is very inconvenient. Sometimes, it is not easy to find that two different battery groups have the same address, resulting in communication abnormalities.

[0003] In addition, during use, each battery pack generates different amounts of heat depending on the real-time current. Therefore, if the same wind volume is continuously used to dissipate heat for battery packs with different heat generation, some battery packs may not dissipate enough heat, thereby shortening the life of the battery pack. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a lithium battery management system with automatic coding addressing, which can provide address information for each battery pack and adjust the air volume according to the heat generation.

[0005] A lithium battery management system with automatic coding addressing of the present invention comprises a casing; a plurality of battery packs and a control system are arranged vertically in the casing; the battery pack comprises a rectangular lithium battery fixed in the casing, and a hollow heat sink fixed at the upper and lower ends of the lithium battery; and each lithium battery is connected in parallel.

[0006] The control system assigns different addresses to each battery pack; the heat sink is evenly provided with air outlets at one end facing the lithium battery and an air inlet at one end facing the center of the casing; the battery pack also includes a windshield for changing the air intake volume of the air inlet.

[0007] The control system controls the movement of the windshield according to the current of the lithium battery, thereby changing the air intake volume of the air inlet.

[0008] As a further improvement of the present invention, the control system includes an external communication port, an internal automatic addressing input port, an internal automatic addressing output port, and an internal automatic addressing communication port.

[0009] As a further improvement of the present invention, the lithium battery includes two electrodes; a conductive column connected to the electrodes is arranged in the housing; the battery pack also includes a blocking piece slidably connected to the lithium battery and capable of blocking the connection between the electrodes and the conductive column; the blocking piece is made of non-conductive material.

[0010] As a further improvement of the present invention, the battery pack also includes an adjusting wheel rotatably connected to the casing; a plurality of adjusting teeth for driving the wind shield to move are circumferentially arranged on the adjusting wheel; an eccentrically distributed abutment plate for driving the blocking plate to move is arranged on the adjusting wheel; when the adjusting teeth cooperate with the wind shield, the abutment plate does not contact the blocking plate.

[0011] As a further improvement of the present invention, a ventilation box is arranged in the middle of the casing; a plurality of ventilation ducts are arranged on the ventilation box; a ventilation duct is connected to an air inlet; a lifting seat is longitudinally slidably connected inside the ventilation box; a driving gear for driving the adjusting wheel to rotate is rotatably connected to the lifting seat.

[0012] As a further improvement of the present invention, two longitudinally arranged screws are rotatably connected in the ventilation box; two gear sleeves are rotatably connected on the lifting seat; one gear sleeve is connected to a screw through a threaded transmission; and one gear sleeve is connected to a driving gear through a transmission connection.

[0013] As a further improvement of the present invention, the battery pack also includes a reset rack that slides in the horizontal direction and meshes with the adjusting wheel; the adjusting wheel is coaxially provided with a reset gear that meshes with the reset rack; reset blocks are longitudinally slidably connected on both sides of the sliding direction of the reset rack in the ventilation box; and a reset inclined surface that drives the reset rack to move is provided at the lower end of the reset block.

[0014] As a further improvement of the present invention, a socket is provided at one end of the reset block facing the lifting seat; an insert block is slidably connected to the lifting seat in a horizontal direction and can be plugged into the socket so that the reset block and the lifting seat can move synchronously.

[0015] As a further improvement of the present invention, a fan for providing airflow into the ventilation box is arranged in the casing; the fan includes an outer shell fixed in the casing and an impeller rotatably connected in the outer shell.

[0016] An adjustment frame is longitudinally slidably connected to the outer periphery of the ventilation box near the reset block; a driving magnet capable of preventing the plug block from being plugged into the reset block is arranged on the adjustment frame; when the impeller rotates, the adjustment frame prevents the plug block from being plugged into the reset block; when the impeller does not rotate, the adjustment frame does not prevent the plug block from being plugged into the reset block.

[0017] Compared with the prior art, the beneficial effect of the present invention is that the present invention automatically assigns different addresses to the parallel slave batteries through software algorithms and hardware support, so that after power-on, there is no need to manually set the address, the operation is convenient and simple, and the error rate is reduced.

[0018] This solution changes the amount of air entering the heat sink by moving the wind shield, and then provides targeted air volume according to the current heat generation of the lithium battery, thereby reducing the waste of wind power.

[0019] The specific parameters of each lithium battery are not exactly the same, which leads to differences in the discharge capacity of each lithium battery. When one lithium battery is exhausted, other lithium batteries will continue to output power. If the exhausted lithium battery is still connected to the circuit at this time, the lithium battery will be idle, causing damage to the lithium battery and reducing the life of the lithium battery.

[0020] By moving the blocking piece, when the lithium battery is about to run out of power, the blocking piece can be inserted between the conductive sheet and the electrode, physically blocking the power output of the lithium battery, avoiding long-term idle consumption of the lithium battery, and providing a stable power-off effect.

[0021] The position of the blocking piece is adjusted according to the heat generated by the lithium battery, thereby changing the air volume entering the heat sink so that the air volume matches the current heat generation, avoiding poor heat dissipation efficiency due to insufficient air volume, or avoiding waste of wind power due to excessive air volume.

[0022] This solution rotates two screws so that when the two screws rotate synchronously, the screws drive the sliding seat to move up and down; when one screw does not rotate and the other screw rotates, the screw can drive the gear sleeve to rotate synchronously, and then drive the adjusting wheel to rotate through the driving gear.

[0023] In this solution, the adjusting wheel can drive the wind shield to move and change the amount of air entering the heat sink, and can also drive the blocking piece to move so that the lithium battery is separated from the conductive column and the lithium battery no longer outputs current; and before the blocking piece is inserted into the electrode and the conductive sheet, the adjusting wheel first drives the wind shield to completely block the ventilation duct, so that for the lithium battery not connected to the conductive column, there will be no wind to dissipate the heat of the lithium battery, thus saving wind power.

[0024] In this solution, the reset block slides downward, so that the reset bevel cooperates with the reset rack, and each adjustment wheel quickly rotates to the initial position, without the need for the driving gear to cooperate with each end face gear to restore each adjustment wheel to its initial position one by one. The reset block speeds up the reset process of the adjustment wheel, which is convenient and quick.

[0025] This solution controls whether the sliding seat drives the reset block to move up and down synchronously by changing the position of the adjustment frame, so that when the sliding seat does not drive the reset block to move, the sliding seat can drive each adjusting wheel to rotate, and when the sliding seat drives the reset block to move synchronously, the reset block quickly restores each adjusting wheel to its initial position.

[0026] The impeller in this solution can be used to generate airflow for dissipating heat from the lithium battery, and can also control the movement of the adjustment frame through centrifugal force to change the position of the adjustment frame. No additional power source is required to control the movement of the adjustment frame, thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the battery pack of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the adjusting wheel of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure when the driving gear of the present invention is meshed with an end face gear;

[0032] Figure 6 This is a schematic diagram of the structure when the driving magnet of the present invention is facing the socket;

[0033] Figure 7 It is a structural schematic diagram of the impeller of the present invention when it rotates;

[0034] Figure 8 This is a structural schematic diagram of the reset block of the present invention driving the reset strip to move to the initial position;

[0035] Fig. 9 It is a structural schematic diagram of the lifting seat and the insert block of the present invention.

[0036] Description of the numbers in the figure:

[0037] 1. Casing; 11. Heat dissipation holes; 12. Control system; 2. Battery pack; 21. Lithium battery; 211. Electrode; 22. Heat sink; 221. Air inlet; 222. Air outlet; 223. Heat sink; 23. Wind shield; 231. Wind shield rack; 24. Blocking plate; 25. Shrapnel; 26. Adjusting wheel; 261. Adjusting tooth; 262. Stop plate; 263. End gear; 264. Reset gear; 27. Reset rack; 3. Conductive column; 31. Conductive sheet; 4. Ventilation box; 41. Ventilation pipe 51. Screw; 52. Lifting seat; 521. Sliding seat; 522. Repulsive magnet; 53. Gear sleeve; 54. Driving gear; 55. Insertion block; 551. Insertion block magnet; 56. Reset block; 561. Socket; 562. Reset ramp; 563. Reset magnet; 57. Screw motor; 6. Fan; 61. Housing; 62. Impeller; 621. Connecting plate; 63. Oblique slider; 64. Longitudinal sliding plate; 65. Adjusting frame; 651. Synchronous slide rail; 652. Driving magnet; 66. Spring. DETAILED DESCRIPTION

[0038] Specific embodiment 1: Please refer to Figure 1-Figure 9A lithium battery management system with automatic coding addressing includes a housing 1; a plurality of battery packs 2 and a control system 12 are arranged vertically in the housing 1; the battery pack 2 includes a rectangular lithium battery 21 fixed in the housing 1, and a hollow heat sink 22 fixed at the upper and lower ends of the lithium battery 21; and each lithium battery 21 is connected in parallel.

[0039] The control system 12 assigns different addresses to each battery pack 2; the heat sink 22 is evenly provided with air outlets 222 at one end facing the lithium battery 21, and an air inlet 221 is provided at one end facing the center of the housing 1; the battery pack 2 also includes a windshield 23 for changing the air intake volume of the air inlet 221.

[0040] The control system 12 controls the movement of the wind shield 23 according to the current of the lithium battery 21 to change the air intake volume of the air inlet 221 .

[0041] The heat sink 22 is evenly provided with heat sinks 223 at one end close to the lithium battery 21; a flow channel for wind to pass through is formed between two adjacent heat sinks 223, which is convenient for dissipating heat from the lithium battery 21; and heat dissipation holes 11 are provided on the outer wall of the housing 1 at positions facing each flow channel.

[0042] The control system 12 includes an external communication port, an internal automatic addressing input port, an internal automatic addressing output port, and an internal automatic addressing communication port.

[0043] The lithium battery 21 includes two electrodes 211; a conductive column 3 connected to the electrode 211 is arranged in the housing 1; the battery pack 2 also includes a blocking piece 24 slidably connected to the lithium battery 21 and capable of blocking the connection between the electrode 211 and the conductive column 3; the blocking piece 24 is made of non-conductive material.

[0044] When the control system 12 detects that the power in the lithium battery 21 at a certain address is too low, the blocking piece 24 moves to between the electrode 211 and the conductive column 3 .

[0045] There are two conductive posts 3, one conductive post 3 is connected to the positive electrode of each lithium battery 21, and the other conductive post 3 is connected to the negative electrode of each lithium battery 21; conductive sheets 31 in contact with the electrodes 211 are evenly arranged on the conductive posts 3; the conductive sheets 31 are elastic, thereby facilitating the insertion of the blocking sheet 24.

[0046] The battery pack 2 also includes an adjusting wheel 26 rotatably connected to the housing 1; the adjusting wheel 26 is provided with a plurality of adjusting teeth 261 along the circumferential direction for driving the windshield 23 to move; the adjusting wheel 26 is provided with an eccentrically distributed abutment plate 262 for driving the blocking piece 24 to move; when the adjusting teeth 261 cooperate with the windshield 23, the abutment plate 262 does not contact the blocking piece 24.

[0047] When the adjusting wheel 26 rotates until the adjusting teeth 261 drive the wind shield 23 to completely block the air inlet 221 , the adjusting wheel 26 continues to rotate, the adjusting teeth 261 separate from the wind shield 23 , the abutment plate 262 contacts the blocking piece 24 , and drives the blocking piece 24 to be inserted between the electrode 211 and the conductive column 3 .

[0048] A spring 25 for resetting the blocking piece 24 is disposed between the blocking piece 24 and the lithium battery 21 .

[0049] A ventilation box 4 is provided in the middle of the casing 1; a plurality of ventilation ducts 41 are provided on the ventilation box 4; a ventilation duct 41 is connected to an air inlet 221; a lifting seat 52 is longitudinally slidably connected inside the ventilation box 4; a driving gear 54 for driving the adjusting wheel 26 to rotate is rotatably connected to the lifting seat 52.

[0050] The wind shield plate 23 is longitudinally sealed and slidably connected in the ventilation duct 41 , and the wind shield plate 23 can change the area through which the airflow in the ventilation duct 41 passes.

[0051] Two longitudinally arranged screw rods 51 are rotatably connected in the ventilation box 4; two gear sleeves 53 are rotatably connected to the lifting seat 52; one gear sleeve 53 is connected to one screw rod 51 through threaded transmission; and one gear sleeve 53 is connected to the driving gear 54 through transmission.

[0052] Two screw motors 57 are fixedly connected in the ventilation box 4; one screw motor 57 drives one screw 51 to rotate; and the two screws 51 have the same rotation direction.

[0053] When the two screws 51 rotate synchronously, the screws 51 drive the lifting seat 52 to move up and down through the gear sleeve 53; when one screw 51 does not rotate and the other screw 51 rotates, the lifting sleeve 52 cannot move up and down, and then the screw 51 drives the corresponding gear sleeve 53 to rotate circumferentially.

[0054] The battery packs 2 are distributed on both sides of the ventilation box 4; the upper and lower ends of the lifting seat 52 are rotatably connected to a driving gear 54 respectively; a driving gear 54 is meshed with a gear sleeve 53 for transmission; one driving gear 54 is close to the battery pack 2 on the left side of the ventilation box 4, and the driving gear 54 can be meshed with the adjusting wheels 26 in each battery pack 2 on the left side of the ventilation box 4; the other driving gear 54 is close to the battery pack 2 on the right side of the ventilation box 4, and the driving gear 54 can be meshed with the adjusting wheels 26 in each battery pack 2 on the right side of the ventilation box 4; at the same time, only one driving gear 54 is transmitted to a certain adjusting wheel 26.

[0055] An end gear 263 capable of meshing with the driving gear 54 is coaxially arranged at one end of the adjusting wheel 26 facing the ventilation box 4 .

[0056] The battery pack 2 also includes a reset rack 27 that slides in the horizontal direction and meshes with the adjustment wheel 26; the adjustment wheel 26 is coaxially provided with a reset gear 264 that meshes with the reset rack 27; the ventilation box 4 is longitudinally slidably connected with a reset block 56 on both sides of the sliding direction of the reset rack 27; the lower end of the reset block 56 is provided with a reset inclined surface 562 that drives the reset rack 27 to move.

[0057] In the initial state, the reset rack 27 is located at the center of the ventilation box 4 , the adjustment tooth 261 is engaged with the wind shield rack 231 , and the wind shield plate 23 blocks half of the ventilation area of ​​the ventilation duct 41 .

[0058] The reset block 56 slides downward, and the reset inclined surfaces 562 on both sides drive the reset rack 27 to move toward the center. Therefore, no matter where the reset rack 27 is located, the reset inclined surfaces 562 will drive the reset rack 27 to move to the initial state.

[0059] The reset block 56 is provided with a socket 561 at one end facing the lifting seat 52 ; the lifting seat 52 is slidably connected with an insert block 55 in a horizontal direction, which can be plugged into the socket 561 so that the reset block 56 and the lifting seat 52 can move synchronously.

[0060] The housing 1 is provided with a fan 6 for providing airflow to the ventilation box 4 ; the fan 6 includes a shell 61 fixed in the housing 1 and an impeller 62 rotatably connected in the shell 61 .

[0061] An adjustment frame 65 is longitudinally slidably connected to the outer periphery of the ventilation box 4 near the reset block 56; the adjustment frame 65 is provided with a driving magnet 652 that can prevent the plug block 55 and the reset block 56 from being plugged in; when the impeller 62 rotates, the adjustment frame 65 prevents the plug block 55 and the reset block 56 from being plugged in; when the impeller 62 does not rotate, the adjustment frame 65 does not prevent the plug block 55 and the reset block 56 from being plugged in.

[0062] A connecting disk 621 is provided at the lower end of the impeller 62 below the outer casing 61; an inclined sliding block 63 is radially slidably connected to the connecting disk 621; an inclined guide surface is provided on the inclined sliding block 63; a longitudinal sliding disk 64 in contact with the guide surface is longitudinally slidably connected below the connecting disk 621; a spring 66 for resetting the longitudinal sliding disk 64 is provided between the longitudinal sliding disk 64 and the connecting disk 621.

[0063] The adjusting frame 65 is provided with a horizontally distributed synchronous slide rail 651; the longitudinal sliding plate 64 is installed in the synchronous slide rail 651, and then the longitudinal sliding plate 64 rotates relative to the adjusting frame 65 in the circumferential direction and slides synchronously in the longitudinal direction. The air outlet end of the housing 61 is connected to the ventilation box 4.

[0064] The lifting seat 52 is provided with a sliding seat 521 that is slidably connected with the plug block 55; the sliding seat 521 is provided with a repulsive magnet 522; the plug block 55 is provided with an plug block magnet 551 that repels the repulsive magnet 522. The plug block magnet 551 and the driving magnet 652 repel each other, and the repulsive force between the plug block magnet 551 and the driving magnet 652 is greater than the repulsive force between the plug block magnet 551 and the repulsive magnet 522.

[0065] The reset block 56 is provided with a reset magnet 563; the upper part of the side wall of the ventilation box 4 is provided with a positioning magnet that can be tightly attracted to the reset magnet 563. When the reset block 56 and the positioning magnet are tightly attracted to each other, the reset block 56 is located at the upper limit position and the reset block 56 is fixed at this position.

[0066] When the impeller 62 rotates, the inclined slider 63 moves toward the periphery under the action of centrifugal force, and then the guide surface drives the longitudinal sliding disk 64 to move to the lower limit position. The adjustment frame 65 is located at the lower limit position, and the driving magnet 652 is opposite to the socket 561. If the lifting seat 52 moves to the insertion block 55 and the socket 561 at this time, due to the large repulsive force between the insertion block magnet 551 and the driving magnet 652, the insertion block 55 is located near the sliding seat 521, and the insertion block 55 is not plugged into the socket 561.

[0067] When the impeller 62 does not rotate, the longitudinal sliding disk 64 is located at the upper limit position under the action of the spring 66, the adjustment frame 65 is located at the upper limit position, and the driving magnet 652 is located above the socket 561. If the lifting seat 52 moves to the insertion block 55 and the socket 561 at this time, the insertion block 55 will be plugged into the socket 561 under the repulsive force of the repulsive magnet 522 and the insertion block magnet 551, and then the lifting seat 52 and the reset block 56 move up and down synchronously.

[0068] An impeller motor for driving the impeller 62 to rotate is fixedly connected to the housing 61. The reset block 56 is arranged at an angle close to the end surface of the plug block 55, so that when the plug block 55 moves upward from the bottom of the reset block 56, after the plug block 55 contacts the reset block 56, the plug block 55 moves along the inclined end surface in a direction away from the reset block 56, and finally faces the socket 561.

[0069] In the initial state, the reset rack 27 is located at the center of the ventilation box 4, the wind shield 23 blocks half of the ventilation area of ​​the ventilation duct 41, and the reset block 56 is located at the upper limit position.

[0070] The specific steps of encoding the battery pack 2 in the housing 1 are as follows:

[0071] 1. After all lithium batteries 21 are powered on, the default address is 1 (host);

[0072] 2. After battery pack A 2 detects that the internal automatic addressing input port has address information, it obtains the address and the local address is automatically increased by 1;

[0073] 3. Battery pack A 2 automatically addresses the output port to output the local address;

[0074] 4. After receiving the address information of battery pack A, battery pack B 2 records the address and increases the address of the battery pack by 1.

[0075] 5. Battery pack B 2 automatically addresses the output port to output the local address;

[0076] 6. Since the host battery has no address input information, it is the default host. The slave batteries have received the battery address information and determined their own address information, which are different from each other.

[0077] 7. The host battery obtains the battery information summary of different addresses through 485 communication, and sends the battery information of the entire parallel battery group 2 through the external communication port;

[0078] After allocating address information to each battery pack 2, the control system 12 can monitor the flow of the battery pack 2 at each address and manage the remaining power and current in each lithium battery 21. When the current is large, the heat generated by the lithium battery 21 will increase, and the heat dissipation wind force needs to be increased; when the current is small, the heat generated by the lithium battery 21 will decrease, and the heat dissipation wind force can be reduced to provide sufficient wind force for other lithium batteries 21.

[0079] When the lithium battery 21 is in use, the impeller 62 rotates to provide airflow into the ventilation box 4. At the same time, the inclined slider 63 moves toward the periphery under the action of centrifugal force, so that the longitudinal sliding plate 64 and the adjustment frame 65 are located at the lower limit position, the driving magnet 652 is opposite to the socket 561, and the plug 55 cannot be inserted into the socket 561.

[0080] When the control system 12 detects that the current of a lithium battery 21 increases or decreases, the control system 12 controls the two screw motors 57 to work according to the address information of the lithium battery 21, and the two screws 51 rotate synchronously, so that the lifting seat 52 moves. Finally, the lifting seat 52 moves to the driving gear 54 and meshes with the end gear 263 corresponding to the lithium battery 21.

[0081] Then one screw 51 stops rotating, and the other screw 51 rotates, driving the driving gear 54 to rotate through the gear sleeve 53, and then the end gear 263 rotates, and the adjusting tooth 261 drives the wind shield rack 231 to move, so that the wind shield plate 23 moves in the ventilation duct 41, changing the air volume entering the heat sink 22 to adapt to the current of the lithium battery 21.

[0082] The airflow generated by the fan 6 enters the ventilation box 4 and enters the heat sink 22 through the ventilation duct 41. The airflow then acts on the surface of the lithium battery 21 through the air outlet 222, absorbs the heat on the surface of the lithium battery 21, and finally discharges it to the outside through the heat dissipation holes 11 on the housing 1, thereby completing the heat dissipation of the lithium battery 21.

[0083] As the lithium battery 21 is used, when the control system 12 detects that the power in a lithium battery 21 is about to be consumed, the control system 12 drives the two screws 51 to rotate synchronously, the sliding seat 521 moves, and the driving gear 54 engages with the corresponding end face gear 263. Then one screw 51 stops rotating, the other screw 51 rotates, and the driving gear 54 drives the adjusting wheel 26 to rotate, and the windshield plate 23 completely blocks the ventilation duct 41 through the cooperation of the adjusting tooth 261 and the windshield rack 231, and then the abutment plate 262 abuts against the blocking sheet 24, and pushes the blocking sheet 24 to be inserted between the electrode 211 and the conductive sheet 31, so that the lithium battery 21 is disconnected from the conductive column 3.

[0084] Before charging each lithium battery 21 through the control system 12, the fan 6 does not work, the longitudinal sliding plate 64 and the adjustment frame 65 are located at the upper limit position, and the driving magnet 652 is located above the socket 561. At this time, the two screws 51 rotate, and the lifting seat 52 moves upward until the plug block 55 is opposite to the socket 561, and under the action of the repulsive magnet 522 and the plug block magnet 551, the plug block 55 is inserted into the socket 561.

[0085] Then the sliding seat 521 drives each reset block 56 to move downward, and the reset slope 562 abuts against each reset rack 27, forcing each rack 27 to move to the center position in the ventilation box 4, and then each battery pack 2 returns to its initial state.

Claims

1. A lithium battery management system with automatic coding addressing, characterized in that: The invention comprises a housing (1); a plurality of battery packs (2) and a control system (12) are arranged vertically in the housing (1); the battery pack (2) comprises a rectangular lithium battery (21) fixed in the housing (1), and a hollow heat sink (22) fixed at the upper and lower ends of the lithium battery (21); and the lithium batteries (21) are connected in parallel; The control system (12) assigns different addresses to each battery pack (2); the heat sink (22) is evenly provided with air outlets (222) at one end facing the lithium battery (21), and is provided with an air inlet (221) at one end facing the center of the housing (1); the battery pack (2) further comprises a windshield (23) for changing the air intake volume of the air inlet (221); The control system (12) controls the movement of the windshield (23) according to the current of the lithium battery (21), thereby changing the air intake volume of the air inlet (221); The lithium battery (21) comprises two electrodes (211); a conductive column (3) connected to the electrode (211) is arranged in the housing (1); the battery pack (2) further comprises a blocking piece (24) slidably connected to the lithium battery (21) and capable of blocking the connection between the electrode (211) and the conductive column (3); the blocking piece (24) is made of a non-conductive material; The battery pack (2) further comprises an adjusting wheel (26) rotatably connected to the housing (1); a plurality of adjusting teeth (261) for driving the windshield plate (23) to move are arranged on the adjusting wheel (26) along the circumferential direction; and a stop plate (262) for driving the blocking plate (24) to move is arranged on the adjusting wheel (26) and is eccentrically distributed; when the adjusting teeth (261) cooperate with the windshield plate (23), the stop plate (262) does not contact the blocking plate (24).

2. A lithium battery management system with automatic coding addressing according to claim 1, characterized in that: The control system (12) comprises an external communication port, an internal automatic addressing input port, an internal automatic addressing output port, and an internal automatic addressing communication port.

3. A lithium battery management system with automatic coding addressing according to claim 1, characterized in that: A ventilation box (4) is arranged in the middle of the casing (1); a plurality of ventilation ducts (41) are arranged on the ventilation box (4); one ventilation duct (41) is connected to an air inlet (221); a lifting seat (52) is longitudinally slidably connected inside the ventilation box (4); a driving gear (54) for driving the adjusting wheel (26) to rotate is rotatably connected to the lifting seat (52).

4. A lithium battery management system with automatic coding addressing according to claim 3, characterized in that: Two longitudinally arranged screw rods (51) are rotatably connected inside the ventilation box (4); two gear sleeves (53) are rotatably connected to the lifting seat (52); one gear sleeve (53) is connected to one screw rod (51) through threaded transmission; and the other gear sleeve (53) is connected to the driving gear (54) through transmission.

5. A lithium battery management system with automatic coding addressing according to claim 3, characterized in that: The battery pack (2) further comprises a reset rack (27) which slides in a horizontal direction and meshes with the adjusting wheel (26); a reset gear (264) which meshes with the reset rack (27) is coaxially arranged on the adjusting wheel (26); reset blocks (56) are longitudinally slidably connected on both sides of the sliding direction of the reset rack (27) in the ventilation box (4); and a reset inclined surface (562) which drives the reset rack (27) to move is arranged at the lower end of the reset block (56).

6. A lithium battery management system with automatic coding addressing according to claim 5, characterized in that: A socket (561) is provided at one end of the reset block (56) facing the lifting seat (52); an insert block (55) is slidably connected to the lifting seat (52) in a horizontal direction and can be plugged into the socket (561) so that the reset block (56) and the lifting seat (52) can move synchronously.

7. A lithium battery management system with automatic coding addressing according to claim 6, characterized in that: A fan (6) for providing airflow to the ventilation box (4) is arranged in the casing (1); the fan (6) comprises a shell (61) fixed in the casing (1) and an impeller (62) rotatably connected in the shell (61); An adjustment frame (65) is longitudinally slidably connected to a position of the outer periphery of the ventilation box (4) near the reset block (56); a driving magnet (652) capable of preventing the plug block (55) from being plugged into the reset block (56) is provided on the adjustment frame (65); when the impeller (62) rotates, the adjustment frame (65) prevents the plug block (55) from being plugged into the reset block (56); when the impeller (62) does not rotate, the adjustment frame (65) does not prevent the plug block (55) from being plugged into the reset block (56).

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