Battery assembly capable of automatically replacing battery cell

Abstract

The invention relates to the technical field of batteries, in particular to a battery assembly capable of automatically replacing battery cells, which comprises an outer protective shell and a plurality of working battery cells arranged in the outer protective shell, the working battery cells are electrically connected in parallel first and then in series, and the battery assembly further comprises a parallel guide plate, a plurality of battery cells and a plurality of battery cells, the working battery cells are connected in parallel through the parallel guide plate to form a battery parallel group; according to the battery assembly, when it is detected that the working battery cell breaks down, the working battery cell can be automatically replaced in the battery assembly, simple automatic maintenance is achieved, and the battery assembly is suitable for many fields with low manual maintenance frequency.

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: 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; 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.

[0005] 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.

[0006] 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.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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 chamber drives the conductive contact rod so that the conductive contact rod has an elastic tendency to move upward.

[0014] An insulating friction belt is arranged between the conductive contact rod and the parallel guide plate, a shrinkage bin is arranged at one end of the insulating friction belt, the shrinkage bin has an elastic tendency to reel in the insulating friction belt, a roller end plate is fixedly arranged on the shrinkage bin, a supporting roller is rotatably arranged on the roller end plate, and the supporting roller supports the insulating friction belt.

[0015] 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.

[0016] 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.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The battery assembly of the present invention can automatically replace the working battery cell when a fault is detected in the working battery cell, thereby realizing simple automatic maintenance, and is applicable to many fields with low manual maintenance frequency; By cooperating with structures such as the elastic support compartment, the insulating friction belt and the shrinkage compartment, the parallel conductor plate and the conductive contact rod can be isolated and separated when all the working cells are working normally; and when the battery cell needs to be replaced and connected to the parallel conductor plate, the contact surface between the parallel conductor plate and the conductive contact rod is polished to remove the oxide layer and reduce the contact resistance between the parallel conductor plate and the conductive contact rod. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 This is a schematic diagram of the cutaway upper portion of the outer protective shell of the present invention.

[0020] Figure 3 This is a top view of the upper portion of the outer protective shell of the present invention.

[0021] Figure 4 It is a three-dimensional half-section schematic diagram of the insulating moving block of the present invention.

[0022] Figure 5 for Figure 4 A magnified schematic diagram of area A in the middle.

[0023] Figure 6 This is a schematic diagram of a side cutaway view of the outer protective shell of the present invention.

[0024] Figure 7 for Figure 6 Enlarged schematic diagram of area B in the middle.

[0025] In the figure: 1, outer protective shell; 2, working battery cell; 3, parallel guide plate; 4, replacement battery cell; 5, charge and discharge control module; 201, conductive spring; 202, fixed branch; 203, insulating moving block; 204, cylindrical cavity; 205, piston body; 206, limit inner ring; 207, retaining spring; 208, gas shaft tube; 209, horizontal support plate; 210, electromagnetic gas valve; 211, compressed gas cylinder; 101, inner wall track strip; 102. Matching buckle eaves; 103. U-shaped battery hanging plate; 104. Screw slider; 105. Screw shaft; 106. Rotary drive; 501. Voltage detection module; 502. Independent battery; 401. Elastic support bin; 402. Conductive contact rod; 403. Insulating friction belt; 404. Retraction bin; 405. Support roller; 406. Roller end plate; 407. Electromagnetic locker; 408. Locking groove; 107. Electrical connection seat. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figures 1 to 7 The present invention provides a technical solution: a battery assembly capable of automatically replacing battery cells, such as Figure 6As shown in, it includes an outer protective shell 1 and working cells 2 arranged inside the outer protective shell 1. There are several working cells 2. The working cells 2 are electrically connected in parallel first and then in series. The battery assembly also includes: a parallel conductor plate 3. The parallel conductor plate 3 is directly insulated from the outer protective shell 1 and fixed to each other. The working cells 2 are connected in parallel through the parallel conductor plates 3 to form a battery group. The parallel conductor plates 3 corresponding to each battery group are connected in series with each other. A sliding separation unit is provided between the working cells 2 and the parallel conductor plates 3. The sliding separation unit can disconnect the electrical connection between the faulty working cells 2 and the parallel conductor plates 3 when a fault occurs in the working cells 2. A replacement battery cell 4, which has the same specification as the working battery cell 2 and is used to replace the faulty working battery cell 2; a track drive unit, through which the replacement battery cell 4 is moved and controlled, so that the replacement battery cell 4 and different parallel guide plates 3 are switched in corresponding positions; a charge and discharge control module 5, which includes a charging circuit and a discharging circuit. When the working battery cell 2 fails, the voltage of the replacement battery cell 4 is controlled by the charge and discharge control module 5, so that the voltage of the replacement battery cell 4 and the working battery cell 2 remain consistent within an error range.

[0028] The working cell 2 is provided with a pressure sensor, a temperature sensor and a liquid level sensor for fault detection; the pressure sensor is used to monitor the internal pressure of the working cell 2. When the working cell 2 bulges, the internal pressure of the working cell 2 will be too high, so it can be monitored. The temperature sensor is used to monitor the temperature of the working cell 2, so that feedback can be provided before the working cell 2 has thermal runaway and after the temperature exceeds the set value. The liquid level sensor is used to monitor the liquid level of the electrolyte, and can detect faults such as damage to the shell of the working cell 2 and electrolyte leakage. The working cell 2 also has an integrated voltage sensor.

[0029] like Figure 5 As shown in the figure, the sliding separation unit includes a conductive spring 201, a fixed branch 202 and an insulating moving block 203. The conductive spring 201 is provided between the power supply contact of the working battery cell 2 and the parallel guide plate 3 for conductive contact, and the working battery cell 2 is electrically connected to the parallel guide plate 3 through the conductive spring 201; the conductive spring 201 is integrally fixed with a fixed branch 202, and an insulating moving block 203 is provided outside the fixed branch 202, and the position of the conductive spring 201 is controlled by the insulating moving block 203.

[0030] A cylindrical cavity 204 is opened in the insulating moving block 203, and 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 fixed inside the cylindrical cavity 204, and a retaining spring 207 is arranged between the limiting inner ring 206 and the piston body 205.

[0031] A gas shaft tube 208 is fixedly arranged on the piston body 205, and 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, and an electromagnetic gas valve 210 is embedded in the transverse support plate 209. One end of the gas shaft tube 208 is connected to the electromagnetic gas valve 210, and the other end of the gas shaft tube 208 is connected to the side surface of the piston body 205 away from the retaining spring 207.

[0032] A compressed gas cylinder 211 is arranged inside the outer protective shell 1, and the compressed gas cylinder 211 is connected to the electromagnetic gas valve 210 through an air 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 interior 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 spring 201 is moved out from between the power supply contacts of the parallel guide plate 3 and the working battery cell 2. At this time, the working battery cell 2 at the corresponding position is electrically disconnected from the parallel guide plate 3.

[0033] The track drive unit includes an inner wall track bar 101, a matching buckle eave 102 and a U-shaped battery hanging plate 103. The inner wall track bar 101 is fixedly arranged on the inner wall surface of the outer protective shell 1, the matching buckle eave 102 is slidingly limited and buckled with the inner wall track bar 101, the U-shaped battery hanging plate 103 is fixedly installed with the matching buckle eave 102, and the replacement battery cell 4 is installed on the U-shaped battery hanging plate 103.

[0034] A screw slider 104 is fixedly arranged on the U-shaped battery hanging plate 103, and a screw shaft 105 is inserted in the screw slider 104. The screw slider 104 is driven to move by the rotation of the screw shaft 105, so that the U-shaped battery hanging plate 103 is moved and adjusted along the axial direction of the screw shaft 105. A rotation driver 106 for driving the screw shaft 105 to rotate is arranged at the end of the screw shaft 105, and the rotation driver 106 is composed of a servo motor and a reduction gear set.

[0035] A voltage detection module 501 is provided on the replacement battery cell 4, and the voltage detection module 501 is used to monitor the voltage of the replacement battery cell 4. An independent battery 502 is provided in the outer protective shell 1, and 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; When the voltage of the replacement battery cell 4 is lower than the voltage of the working battery cell 2 in the fault condition, the charge and discharge control module 5 charges the replacement battery cell 4 through the power supply of the independent battery 502; When the voltage of the replacement battery cell 4 is higher than the voltage of the working battery cell 2 in the fault condition, the charge and discharge control module 5 discharges the replacement battery cell 4 .

[0036] The replacement battery cell 4 is provided with an elastic support compartment 401 and a conductive contact rod 402, the conductive contact rod 402 is in an upward and downward movable state, and the replacement battery cell 4 is electrically connected through the conductive contact rod 402; The elastic support bin 401 drives the conductive touch rod 402 so that the conductive touch rod 402 has an elastic tendency to move upward. A supporting spring sheet or spring can be provided in the elastic support bin 401 to elastically drive the conductive touch rod 402 upward. Details will not be given here. The conductive touch rod 402 can be raised and lowered relative to the replacement battery cell 4. The conductive touch rod 402 is connected to the replacement battery cell 4 by a wire.

[0037] An insulating friction belt 403 is arranged between the conductive contact rod 402 and the parallel guide plate 3. The insulating friction belt 403 is insulating and has polished stone particles attached to its surface. A contraction bin 404 is arranged at one end of the insulating friction belt 403. The interior of the contraction bin 404 is composed of a reel and a clockwork spring. The clockwork spring applies a resetting rotational driving force to the reel, so that the contraction bin 404 has an elastic tendency to reel up the insulating friction belt 403. A roller end plate 406 is fixedly arranged on the contraction bin 404, and a support roller 405 is rotatably arranged on the roller end plate 406. The support roller 405 supports the insulating friction belt 403.

[0038] The other end of the insulating friction belt 403 is provided with an electromagnetic locker 407, which is fixedly installed with the replacement battery cell 4. The electromagnetic locker 407 is provided with a locking groove 408. The electromagnetic locker 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 retractable pin is provided in the locking groove 408. The electromagnetic locker 407 controls the extension and retraction of the pin. A clamping hole is provided on the insulating friction belt 403. The pin is inserted into the clamping hole to limit and lock the insulating friction belt 403. When the electromagnetic locker 407 is energized, the pin is driven to retract by electromagnetic action, so that the insulating friction belt 403 is released.

[0039] An electrical connection seat 107 is provided on the surface of the outer protective shell 1 , and the parallel conductive plates 3 corresponding to the battery group are connected in series and then electrically connected to the electrical connection seat 107 .

[0040] The present invention can automatically replace the battery cell of the battery assembly. When in use, the working battery cells 2 are first connected in parallel through the parallel guide plate 3. Figure 3 As shown in FIG. 1 , the working cells 2 arranged side by side along the length direction of the parallel guide plate 3 are called a battery group. Figure 3 Three battery groups are shown, each battery group has four working cells 2; the parallel conductive plates 3 corresponding to the three battery groups are connected in series with each other, and finally connected to the outside through the electrical connection socket 107.

[0041] When the sensor inside the working cell 2 detects that a certain working cell 2 has a high-risk fault such as overpressure or thermal runaway, the electromagnetic valve 210 corresponding to the faulty working 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 valve 210. Figure 5 As shown in the figure, the insulating moving block 203 is driven to move relative to the piston body 205. At this time, the conductive spring 201 will move out from between the power supply contacts of the parallel guide plate 3 and the working battery cell 2, thereby disconnecting the electrical connection between the faulty working battery cell 2 and the parallel guide plate 3.

[0042] The screw shaft 105 is driven to rotate by the rotary driver 106 to control the position of the replacement battery cell 4 so that the replacement battery cell 4 moves to the battery group where the faulty working battery cell 2 is located; the current voltage of other working battery cells 2 in the battery group is obtained, and the voltage of the replacement battery cell 4 is detected by the voltage detection module 501. When the voltage of the replacement battery cell 4 is lower than the current voltage of other working battery cells 2 in the battery 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 voltage of other working battery cells 2 in the battery 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 voltage of other working battery cells 2 in the battery group within an error range.

[0043] The electromagnetic lock 407 is powered by an independent battery 502 to release the insulating friction belt 403. At this time, under the winding drive of the shrinkage bin 404, the insulating friction belt 403 moves toward the inside of the shrinkage bin 404. During the movement of the insulating friction belt 403, the bottom of the insulating friction belt 403 grinds the upper surface of the conductive contact rod 402, and the top of the insulating friction belt 403 grinds the lower surface of the parallel guide plate 3 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 is completely removed, the conductive contact rod 402 moves upward and is in conductive contact with the parallel guide plate 3. At this time, the replacement battery cell 4 will be connected in parallel to the battery pack to complete the replacement.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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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