A battery assembly capable of automatically replacing the battery cells

Abstract

The present invention relates to the technical field of batteries, and specifically relates to a battery assembly capable of automatically replacing battery cells. The battery assembly includes an outer protective shell and working battery cells arranged inside the outer protective shell. The number of the working battery cells is several, and the working battery cells adopt an electrical connection mode of first parallel connection and then series connection. The battery assembly further includes: a parallel guide plate, through which the working battery cells are connected in parallel to form a battery parallel group; The battery assembly of the present invention can automatically replace the working battery cells inside when it detects that the working battery cells are faulty, realizing simple automatic maintenance, and is applicable to many fields with a low frequency of manual maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery assembly capable of automatically replacing battery cells. Background Art

[0002] A battery assembly is an energy storage unit composed of a collection of battery cells. The battery assembly includes a large number of battery cells. Due to the uncertainty of the quality of the battery cells, the failure of a single battery cell will affect the stability of the entire battery assembly, especially catastrophic failures such as increased internal pressure, bulging, thermal runaway, etc. If the battery cells are not replaced in time, a chain reaction may easily occur, causing the entire battery assembly to explode. Therefore, in the prior art, when a battery cell in a battery assembly has a fault alarm, manual labor is often dispatched to replace the faulty battery cell in the battery assembly in a timely manner. However, this method increases the manual workload, especially in some places with low manual maintenance frequency, such as equipment battery assemblies in remote areas. The time and travel cost of manual maintenance and replacement are high. Summary of the invention

[0003] The object of the present invention is to provide a battery assembly capable of automatically replacing battery cells, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a battery assembly capable of automatically replacing a battery cell, comprising an outer protective shell and a working battery cell disposed inside the outer protective shell, wherein the number of the working batteries is several, and the working batteries are electrically connected in parallel and then in series, and the battery assembly further comprises:

[0005] Parallel guide plates, the working cells are connected in parallel through the parallel guide plates to form a battery group, and the parallel guide plates corresponding to each battery group are connected in series; a sliding separation unit is provided between the working cells and the parallel guide plates, and the sliding separation unit can disconnect the electrical connection between the faulty working cells and the parallel guide plates when a fault occurs in the working cells;

[0006] A replacement battery cell, the replacement battery cell having the same specifications as the working battery cell and being used to replace a faulty working battery cell;

[0007] A track driving unit, wherein the replacement battery cell is moved and controlled by the track driving unit so that the replacement battery cell and different parallel guide plates are switched to corresponding positions;

[0008] The charge and discharge control module controls the voltage of the replacement battery cell when a working battery cell fails, so that the voltage of the replacement battery cell is consistent with that of the working battery cell within an error range.

[0009] The working cell is provided with a pressure sensor, a temperature sensor and a liquid level sensor inside to detect faults;

[0010] The pressure sensor is used to monitor the internal pressure of the working battery cell, the temperature sensor is used to monitor the temperature condition of the working battery cell, and the liquid level sensor is used to monitor the liquid level height of the electrolyte.

[0011] The sliding separation unit includes a conductive elastic sheet, a fixed support portion, and an insulating moving block. A conductive elastic sheet is conductively contacted and arranged between the power supply contact of the working battery cell and the parallel guide plate, and the working battery cell is electrically connected to the parallel guide plate through the conductive elastic sheet;

[0012] A fixed support portion is integrally and fixedly arranged on the conductive elastic sheet, and an insulating moving block is arranged outside the fixed support portion to control the position of the conductive elastic sheet through the insulating moving block.

[0013] A cylindrical cavity is formed in the insulating moving block, a piston body is arranged in the cylindrical cavity, the piston body is in airtight contact with the inner wall surface of the cylindrical cavity, a limiting inner ring is fixedly arranged inside the cylindrical cavity, and a holding spring is arranged between the limiting inner ring and the piston body.

[0014] A gas shaft tube is fixedly arranged on the piston body, a transverse support plate is fixedly arranged inside the outer protective shell, the transverse support plate is fixedly installed with the gas shaft tube, an electromagnetic gas valve is embedded and installed on the transverse support plate, one end of the gas shaft tube is communicated with the electromagnetic gas valve, and the other end of the gas shaft tube is communicated with the surface of the piston body away from the holding spring.

[0015] A compressed gas cylinder is arranged inside the outer protective shell, the compressed gas cylinder is communicated with the electromagnetic gas valve through a gas pipe. When the electromagnetic gas valve is opened, the gas in the compressed gas cylinder enters the gas shaft tube through the electromagnetic gas valve, then enters the inside of the cylindrical cavity through the gas shaft tube, and pushes the insulating moving block to move relative to the piston body, so that the conductive elastic sheet moves out from between the parallel guide plate and the power supply contact of the working battery cell, and at this time, the working battery cell at the corresponding position is disconnected from the parallel guide plate.

[0016] The track driving unit includes an inner wall track strip, a matching buckle eaves, and a U-shaped battery hanging plate. The inner wall track strip is fixedly arranged on the inner wall surface of the outer protective shell, the matching buckle eaves is slidably and limit-fitted with the inner wall track strip, the U-shaped battery hanging plate is fixedly installed with the matching buckle eaves, and the replacement battery cell is installed on the U-shaped battery hanging plate.

[0017] A lead screw slider is fixedly arranged on the U-shaped battery hanging plate, a lead screw shaft is inserted through the lead screw slider, and the rotation of the lead screw shaft drives the lead screw slider to move, so that the U-shaped battery hanging plate moves and adjusts along the axial direction of the lead screw shaft. A rotation driver for driving the rotation of the lead screw shaft is arranged at the end of the lead screw shaft.

[0018] A voltage detection module is provided on the replacement battery cell, and the voltage detection module is used to monitor the voltage of the replacement battery cell. An independent battery is provided in the outer protective shell, and the independent battery supplies power to the charge and discharge control module;

[0019] When the voltage of the replacement battery cell is lower than the voltage of the working battery cell under fault conditions, the charge and discharge control module charges the replacement battery cell through the power supply of the independent battery;

[0020] When the voltage of the replacement battery cell is higher than the voltage of the working battery cell under fault conditions, the charge and discharge control module discharges the replacement battery cell.

[0021] An elastic support bin and a conductive contact rod are provided on the replacement battery cell. The conductive contact rod is in an up-and-down movable state, and the replacement battery cell is electrically connected through the conductive contact rod;

[0022] The elastic support bin drives the conductive contact rod, so that the conductive contact rod has an elastic tendency to move upward.

[0023] An insulating friction belt is provided between the conductive contact rod and the parallel guide plate. One end of the insulating friction belt is provided with a contraction bin, and the contraction bin has an elastic tendency to wind up the insulating friction belt. A roller end plate is fixedly provided on the contraction bin, and a support roller is rotatably provided on the roller end plate, and the support roller supports the insulating friction belt.

[0024] The other end of the insulating friction belt is provided with an electromagnetic lock. The electromagnetic lock is fixedly installed with the replacement battery cell. A locking groove is provided on the electromagnetic lock, and the electromagnetic lock limits the insulating friction belt through the locking groove, so that the end of the insulating friction belt is stuck in the locking groove.

[0025] An electrical connection seat is provided on the surface of the outer protective shell. The parallel guide plates corresponding to the battery parallel connection are connected in series with each other and then electrically connected to the electrical connection seat.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The battery assembly of the present invention can automatically replace the working battery cell inside when it detects that the working battery cell fails, realizing simple automatic maintenance, and is applicable to many fields with low frequency of manual maintenance;

[0028] Through the cooperation of structures such as the elastic support bin, the insulating friction belt and the contraction bin, when all the working battery cells are working normally, the parallel guide plate and the conductive contact rod can be isolated and separated; and when it is necessary to conduct contact between the replacement battery cell and the parallel guide plate, the contact surface between the parallel guide plate and the conductive contact rod is polished to remove the oxide layer and reduce the contact resistance between the parallel guide plate and the conductive contact rod. Description of the Drawings

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the upper part of the outer protective shell of the present invention being cut open.

[0031] Figure 3 This is a top view of the upper part of the outer protective shell of the present invention being cut open.

[0032] Figure 4 This is a three-dimensional semi-sectional schematic diagram at the insulating moving block of the present invention.

[0033] Figure 5 It is Figure 4 An enlarged schematic diagram of area A in

[0034] Figure 6 This is a schematic diagram of the side of the outer protective shell of the present invention being cut open.

[0035] Figure 7 It is Figure 6 An enlarged schematic diagram of area B in

[0036] In the figure: 1. Outer protective shell; 2. Working battery cell; 3. Parallel guide plate; 4. Replaceable battery cell; 5. Charge and discharge control module; 201. Conductive elastic sheet; 202. Fixed branch; 203. Insulating moving block; 204. Cylindrical cavity; 205. Piston body; 206. Limiting inner ring; 207. Holding spring; 208. Gas shaft tube; 209. Horizontal support plate; 210. Electromagnetic gas valve; 211. Compressed gas cylinder; 101. Inner wall track bar; 102. Matching buckle eaves; 103. U-shaped battery hanging plate; 104. Screw rod slider; 105. Screw rod shaft; 106. Rotary driver; 501. Voltage detection module; 502. Independent battery; 401. Elastic support bin; 402. Conductive contact rod; 403. Insulating friction belt; 404. Shrinkage bin; 405. Support roller shaft; 406. Roller end plate; 407. Electromagnetic lock; 408. Locking groove; 107. Electrical connection seat. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0038] Please refer to Figures 1 to 7 , the present invention provides a technical solution: a battery assembly capable of automatically replacing battery cells, as Figure 6As shown in the figure, it includes an outer protective shell 1 and working battery cells 2 arranged inside the outer protective shell 1. The number of working battery cells 2 is several, and the working battery cells 2 adopt an electrical connection method of first parallel connection and then series connection. The battery assembly further includes: a parallel connection guide plate 3, which is directly and insulatedly arranged with the outer protective shell 1 and is fixed to each other. The working battery cells 2 are connected in parallel through the parallel connection guide plate 3 to form a battery parallel group, and the parallel connection guide plates 3 corresponding to each battery parallel group are connected in series with each other; a sliding separation unit is arranged between the working battery cells 2 and the parallel connection guide plate 3, and the sliding separation unit can disconnect the electrical connection between the faulty working battery cell 2 and the parallel connection guide plate 3 when a fault occurs in the working battery cell 2;

[0039] A replacement battery cell 4, which has the same specifications as the working battery cell 2 and is used to replace the faulty working battery cell 2; an orbital drive unit, and the replacement battery cell 4 is controlled to move through the orbital drive unit so that the replacement battery cell 4 can switch to corresponding positions with different parallel connection guide plates 3; a charge and discharge control module 5, which includes a charging circuit and a discharging circuit. When a fault occurs in the working battery cell 2, the voltage of the replacement battery cell 4 is controlled through the charge and discharge control module 5 so that the voltage of the replacement battery cell 4 and the working battery cell 2 are kept within an error range.

[0040] A pressure sensor, a temperature sensor and a liquid level sensor are arranged inside the working battery cell 2 for fault detection; the pressure sensor is used to monitor the internal pressure of the working battery cell 2. When the working battery cell 2 bulges, the internal pressure of the working battery cell 2 will be too high, so it can be monitored. The temperature sensor is used to monitor the temperature condition of the working battery cell 2, so that feedback can be made after the temperature exceeds the set value before thermal runaway occurs in the working battery cell 2. The liquid level sensor is used to monitor the liquid level height of the electrolyte, and can detect faults such as when the outer shell of the working battery cell 2 is damaged and the electrolyte leaks. A voltage sensor is also integrated in the working battery cell 2.

[0041] As Figure 5 shown in the figure, the sliding separation unit includes a conductive elastic sheet 201, a fixed branch 202 and an insulating moving block 203. A conductive elastic sheet 201 is conductively and contactingly arranged between the power supply contact of the working battery cell 2 and the parallel connection guide plate 3, and the working battery cell 2 is electrically connected to the parallel connection guide plate 3 through the conductive elastic sheet 201; a fixed branch 202 is integrally and fixedly arranged on the conductive elastic sheet 201, and an insulating moving block 203 is arranged outside the fixed branch 202 to control the position of the conductive elastic sheet 201 through the insulating moving block 203.

[0042] The insulating moving block 203 is provided with a cylindrical cavity 204. A piston body 205 is arranged in the cylindrical cavity 204. The piston body 205 is in airtight contact with the inner wall surface of the cylindrical cavity 204. A limiting inner ring 206 is fixedly arranged inside the cylindrical cavity 204. A holding spring 207 is arranged between the limiting inner ring 206 and the piston body 205.

[0043] A gas shaft tube 208 is fixedly arranged on the piston body 205. A transverse support plate 209 is fixedly arranged inside the outer protective shell 1. The transverse support plate 209 is fixedly installed with the gas shaft tube 208. An electromagnetic gas valve 210 is embedded and installed on the transverse support plate 209. One end of the gas shaft tube 208 is communicated with the electromagnetic gas valve 210, and the other end of the gas shaft tube 208 is communicated with the surface of the piston body 205 away from the holding spring 207.

[0044] A compressed gas cylinder 211 is arranged inside the outer protective shell 1. The compressed gas cylinder 211 is communicated with the electromagnetic gas valve 210 through a gas pipe. When the electromagnetic gas valve 210 is opened, the gas in the compressed gas cylinder 211 enters the gas shaft tube 208 through the electromagnetic gas valve 210, and then enters the inside of the cylindrical cavity 204 through the gas shaft tube 208, pushing the insulating moving block 203 to move relative to the piston body 205, so that the conductive elastic sheet 201 moves out from between the parallel guide plate 3 and the power supply contact of the working battery cell 2. At this time, the working battery cell 2 at the corresponding position is disconnected from the parallel guide plate 3.

[0045] The track driving unit includes an inner wall track strip 101, a matching buckle eaves 102 and a U-shaped battery hanging plate 103. The inner wall track strip 101 is fixedly arranged on the inner wall surface of the outer protective shell 1. The matching buckle eaves 102 is slidably and limit-fastened with the inner wall track strip 101. The U-shaped battery hanging plate 103 is fixedly installed with the matching buckle eaves 102. The replacement battery cell 4 is installed on the U-shaped battery hanging plate 103.

[0046] A lead screw slider 104 is fixedly arranged on the U-shaped battery hanging plate 103. A lead screw shaft 105 is inserted through the lead screw slider 104. By rotating the lead screw shaft 105, the lead screw slider 104 is driven to move, so that the U-shaped battery hanging plate 103 moves and adjusts along the axial direction of the lead screw shaft 105. A rotary driver 106 for driving the rotation of the lead screw shaft 105 is arranged at the end of the lead screw shaft 105. The rotary driver 106 is composed of a servo motor and a reduction gear set inside.

[0047] A voltage detection module 501 is arranged on the replacement battery cell 4. The voltage detection module 501 is used to monitor the voltage of the replacement battery cell 4. An independent battery 502 is arranged in the outer protective shell 1. The independent battery 502 supplies power to the charge and discharge control module 5. The independent battery 502 is a rechargeable battery and can be charged when the entire battery assembly is charged;

[0048] When the voltage of the replacement battery cell 4 is lower than the voltage of the working battery cell 2 in case of a fault, the charge and discharge control module 5 charges the replacement battery cell 4 through the power supply of the independent battery 502;

[0049] When the voltage of the replacement battery cell 4 is higher than the voltage of the working battery cell 2 in case of a fault, the charge and discharge control module 5 discharges the replacement battery cell 4.

[0050] An elastic support bin 401 and a conductive contact rod 402 are arranged on the replacement battery cell 4. The conductive contact rod 402 is in an up-and-down movable state, and the replacement battery cell 4 is electrically connected through the conductive contact rod 402;

[0051] The elastic support bin 401 drives the conductive contact rod 402, so that the conductive contact rod 402 has an elastic tendency to move upward. A support spring plate or a spring can be arranged in the elastic support bin 401 to elastically drive the conductive contact rod 402 upward. This is not elaborated here. The conductive contact rod 402 can move up and down relative to the replacement battery cell 4, and the conductive contact rod 402 and the replacement battery cell 4 are connected by a wire.

[0052] An insulating friction belt 403 is arranged between the conductive contact rod 402 and the parallel guide plate 3. The insulating friction belt 403 has insulation, and abrasive grains are attached to its surface. One end of the insulating friction belt 403 is provided with a retraction bin 404. The inside of the retraction bin 404 is composed of a reel and a clockwork spring. The clockwork spring applies a reset rotational driving force to the reel, so that the retraction bin 404 has an elastic tendency to wind up the insulating friction belt 403. A roller end plate 406 is fixedly arranged on the retraction bin 404, and a support roller 405 is rotatably arranged on the roller end plate 406 to support the insulating friction belt 403.

[0053] The other end of the insulating friction belt 403 is provided with an electromagnetic lock 407. The electromagnetic lock 407 is fixedly installed with the replacement battery cell 4. A locking groove 408 is opened on the electromagnetic lock 407. The electromagnetic lock 407 limits the insulating friction belt 403 through the locking groove 408, so that the end of the insulating friction belt 403 is stuck in the locking groove 408. A telescopic pin shaft is arranged in the locking groove 408. Through the telescopic control of the pin shaft by the electromagnetic lock 407, a clamping hole is opened on the insulating friction belt 403. The insulating friction belt 403 is limited and locked by inserting the pin shaft into the clamping hole. When the electromagnetic lock 407 is powered on, the pin shaft is driven to retract through electromagnetic action, so that the insulating friction belt 403 is released.

[0054] An electrical connection base 107 is arranged on the surface of the outer protective shell 1. The parallel guide plates 3 corresponding to the battery parallel connection are connected in series with each other and then electrically connected to the electrical connection base 107.

[0055] The battery assembly of the present invention can automatically replace the battery cells. When in use, the working battery cells 2 are first connected in parallel through the parallel guide plate 3. As shown in Figure 3 shown, the working battery cells 2 arranged side by side along the length direction of the parallel guide plate 3 are called a battery parallel group. As shown in Figure 3 shown, three battery parallel groups are shown, with four working battery cells 2 in each battery parallel group; the parallel guide plates 3 corresponding to the three battery parallel groups are connected in series with each other, and finally externally connected through the electrical connection seat 107.

[0056] When the sensor inside the working battery cell 2 detects that a certain working battery cell 2 has high-risk faults such as excessive pressure or thermal runaway, the electromagnetic air valve 210 corresponding to the faulty working battery cell 2 is controlled to open, so that the compressed gas in the compressed gas cylinder 211 enters the cylindrical cavity 204 through the electromagnetic air valve 210. As shown in Figure 5 shown, the insulating moving block 203 is driven to move relative to the piston body 205. At this time, the conductive elastic sheet 201 will move out from between the parallel guide plate 3 and the power supply contact of the working battery cell 2, disconnecting the electrical connection between the faulty working battery cell 2 and the parallel guide plate 3.

[0057] The rotation driver 106 is used to drive the lead screw shaft 105 to rotate, controlling the position of the replacement battery cell 4, so that the replacement battery cell 4 moves to the battery parallel group where the faulty working battery cell 2 is located; the current voltages of the other working battery cells 2 in this battery parallel group are obtained, and the voltage of the replacement battery cell 4 is detected through the voltage detection module 501. When the voltage of the replacement battery cell 4 is lower than the current voltages of the other working battery cells 2 in this battery parallel group, the independent battery 502 charges the replacement battery cell 4 through the charge and discharge control module 5; when the voltage of the replacement battery cell 4 is higher than the current voltages of the other working battery cells 2 in this battery parallel group, the replacement battery cell 4 is discharged through the charge and discharge control module 5 until the voltage of the replacement battery cell 4 is the same as the current voltages of the other working battery cells 2 in this battery parallel group within the error range.

[0058] The electromagnetic lock 407 is powered by the independent battery 502 to release the insulating friction belt 403. At this time, under the winding drive of the contraction bin 404, the insulating friction belt 403 moves towards the inside of the contraction bin 404. During the movement of the insulating friction belt 403, the upper surface of the conductive contact rod 402 is polished by the lower surface of the insulating friction belt 403, and the lower surface of the parallel guide plate 3 is polished by the upper surface of the insulating friction belt 403 to remove the oxide layer and reduce the contact resistance between the parallel guide plate 3 and the conductive contact rod 402; when the insulating friction belt 403 completely moves away, the conductive contact rod 402 moves upward and conducts contact with the parallel guide plate 3. At this time, the replacement battery cell 4 will be connected in parallel to this battery parallel group to complete the replacement.

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery assembly capable of automatically replacing a battery cell, comprising an outer protective shell and a working battery cell disposed inside the outer protective shell, characterized in that: There are several working cells, and the working cells are electrically connected in parallel and then in series. The battery assembly also includes: Parallel guide plates, the working cells are connected in parallel through the parallel guide plates to form a battery group, and the parallel guide plates corresponding to each battery group are connected in series; a sliding separation unit is provided between the working cells and the parallel guide plates, and the sliding separation unit can disconnect the electrical connection between the faulty working cells and the parallel guide plates when a fault occurs in the working cells; A replacement battery cell, the replacement battery cell having the same specifications as the working battery cell and being used to replace a faulty working battery cell; A track driving unit, wherein the replacement battery cell is moved and controlled by the track driving unit so that the replacement battery cell and different parallel guide plates are switched to corresponding positions; A charge and discharge control module, when a working battery cell fails, controls the voltage of the replacement battery cell through the charge and discharge control module so that the voltage of the replacement battery cell is consistent with that of the working battery cell within an error range; The replacement battery cell is provided with an elastic support compartment and a conductive contact rod, the conductive contact rod is in an upward and downward movable state, and the replacement battery cell is electrically connected via the conductive contact rod; The elastic support bin drives the conductive contact rod so that the conductive contact rod has an elastic tendency to move upward; an insulating friction belt is arranged between the conductive contact rod and the parallel guide plate, a contraction bin is arranged at one end of the insulating friction belt, the contraction bin has an elastic tendency to reel up the insulating friction belt, a roller end plate is fixedly arranged on the contraction bin, a supporting roller is rotatably arranged on the roller end plate, and the supporting roller supports the insulating friction belt.

2. A battery assembly capable of automatically replacing battery cells according to claim 1, characterized in that: The working cell is provided with a pressure sensor, a temperature sensor and a liquid level sensor inside to detect faults; The pressure sensor is used to monitor the internal pressure of the working battery cell, the temperature sensor is used to monitor the temperature of the working battery cell, and the liquid level sensor is used to monitor the liquid level of the electrolyte.

3. A battery assembly capable of automatically replacing battery cells according to claim 1, characterized in that: The sliding separation unit includes a conductive spring sheet, a fixed branch and an insulating moving block. A conductive spring sheet is provided between the power supply contact of the working cell and the parallel guide plate for conductive contact. The working cell is electrically connected to the parallel guide plate through the conductive spring sheet. A fixed branch is integrally fixedly arranged on the conductive spring sheet, and an insulating moving block is arranged outside the fixed branch, and the position of the conductive spring sheet is controlled by the insulating moving block.

4. A battery assembly capable of automatically replacing battery cells according to claim 3, characterized in that: A cylindrical cavity is provided in the insulating moving block, a piston body is arranged in the cylindrical cavity, the piston body is in airtight contact with the inner wall surface of the cylindrical cavity, a limiting inner ring is fixed inside the cylindrical cavity, and a retaining spring is arranged between the limiting inner ring and the piston body.

5. A battery assembly capable of automatically replacing battery cells according to claim 4, characterized in that: A gas shaft tube is fixedly arranged on the piston body, and a transverse support plate is fixedly arranged inside the outer protective shell. The transverse support plate is fixedly installed with the gas shaft tube, and an electromagnetic gas valve is embedded in the transverse support plate. One end of the gas shaft tube is connected to the electromagnetic gas valve, and the other end of the gas shaft tube is connected to a side surface of the piston body away from the retaining spring.

6. A battery assembly capable of automatically replacing battery cells according to claim 5, characterized in that: A compressed gas cylinder is arranged inside the outer protective shell, and the compressed gas cylinder is connected to the electromagnetic gas valve through an air pipe. When the electromagnetic gas valve is opened, the gas in the compressed gas cylinder enters the gas shaft tube through the electromagnetic gas valve, and then enters the interior of the cylindrical cavity through the gas shaft tube, pushing the insulating moving block to move relative to the piston body, so that the conductive spring piece moves out from between the parallel guide plate and the power supply contacts of the working battery cell. At this time, the working battery cell at the corresponding position is electrically disconnected from the parallel guide plate.

7. A battery assembly capable of automatically replacing battery cells according to claim 1, characterized in that: The track drive unit includes an inner wall track bar, a matching buckle eave and a U-shaped battery hanging plate. The inner wall track bar is fixedly arranged on the inner wall surface of the outer protective shell. The matching buckle eave is slidably limited and buckled with the inner wall track bar. The U-shaped battery hanging plate is fixedly installed with the matching buckle eave, and the replacement battery cell is installed on the U-shaped battery hanging plate.

8. A battery assembly capable of automatically replacing battery cells according to claim 7, characterized in that: A screw slider is fixedly arranged on the U-shaped battery hanging plate, and a screw shaft is inserted in the screw slider. The screw slider is driven to move by the rotation of the screw shaft, so that the U-shaped battery hanging plate is moved and adjusted along the axial direction of the screw shaft. A rotating driver for driving the screw shaft to rotate is arranged at the end of the screw shaft.

9. A battery assembly capable of automatically replacing battery cells according to claim 1, characterized in that: The replacement battery cell is provided with a voltage detection module, and the voltage detection module is used to monitor the voltage of the replacement battery cell. An independent battery is provided in the outer protective shell, and the independent battery supplies power to the charge and discharge control module; When the voltage of the replacement battery cell is lower than the voltage of the working battery cell in the fault condition, the charge and discharge control module charges the replacement battery cell through the power supply of the independent battery; When the voltage of the replacement battery cell is higher than the voltage of the working battery cell in the fault condition, the charge and discharge control module discharges the replacement battery cell.

10. A battery assembly capable of automatically replacing battery cells according to claim 1, characterized in that: An electromagnetic lock is provided at the other end of the insulating friction belt, and the electromagnetic lock is fixedly installed with the replacement battery cell. A locking groove is provided on the electromagnetic lock, and the electromagnetic lock limits the insulating friction belt through the locking groove so that the end of the insulating friction belt is stuck in the locking groove.

11. A battery assembly capable of automatically replacing battery cells according to claim 1, characterized in that: An electrical connection seat is arranged on the surface of the outer protective shell, and the parallel conductive plates corresponding to the battery group are connected in series with each other and then electrically connected to the electrical connection seat.

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