Detection management system for energy storage battery of battery changing cabinet

Abstract

The invention discloses a detection management system for an energy storage battery of a battery changing cabinet, which comprises a main storage battery and a plurality of auxiliary storage batteries, and is characterized in that a discharge module realizes power supply with different powers by adjusting the number of the main storage battery and the plurality of auxiliary storage batteries connected in parallel; the storage battery pack comprises a main storage battery and a plurality of auxiliary storage batteries; the battery block charging mechanism comprises a battery block insertion plate, a butt joint charging head box and a box body fixed-distance moving structure; the plug-in charging head group comprises charging heads of various specifications; the detection management module is used for monitoring the electric quantity in each battery in the storage battery pack in real time. The main storage battery and the auxiliary storage batteries are monitored in real time through the detection management module, the control panel conducts optimal discharging according to the monitoring result of the detection management module to charge the electric vehicle, and the energy storage efficiency of the main storage battery and the auxiliary storage batteries can be monitored in each discharging process; and the detection management module is used for optimally charging each shared electric vehicle battery in each charging process, a sending result is notified in time, and management is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage and charging management of power exchange cabinets, and in particular to a detection and management system for energy storage batteries in power exchange cabinets. Background Art

[0002] The existing battery swap cabinets have the function of charging electric vehicles. Since the electricity consumption in some cities is at a low peak at night, the power supply of power stations cannot reach the optimal power consumption, resulting in energy waste in power generation. Many cities adopt the method of reducing electricity charges at night to encourage electricity users to choose to use electricity at night to improve electricity efficiency when they are not using electricity during the day. However, for electricity consumption at night, many people charge the batteries at night so that they can use the electricity in the batteries during the day to achieve balanced electricity consumption. However, the energy storage of batteries will decrease with the number of charging times, and the utilization rate of electricity will also decrease. In addition, the gap between electricity consumption during the day and at night in urban development is gradually narrowing, and the coordination of electricity utilization is more efficient, making the difference between electricity consumption at night and during the day gradually smaller. The use of energy storage in batteries at night is no longer applicable to battery swap stations, but sometimes when the battery swap station cannot provide city power, it will not be able to supply power, resulting in the battery swap cabinet being unable to be used when the city power cannot supply power.

[0003] The battery packs in the existing battery exchange cabinets are collectively powered, the energy control and power supply effect is poor, the battery monitoring is not in place, it is impossible to maximize the use of the power in the batteries in the battery pack according to needs, and it is impossible to change the charging mode to reduce the power loss of the battery during the charging process.

[0004] For shared electric vehicles, charging is done by removing the battery blocks and charging them centrally, but the charging process cannot be monitored, nor can it be detected whether the energy storage of each battery and the charging are abnormal, unless on-site monitoring is available. Charging can only be managed in a digital way, which is not yet available. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one purpose of the present invention is to propose a detection and management system for energy storage batteries in a battery swap cabinet, which solves the problems that the battery pack in the existing battery swap cabinet cannot intelligently manage the charging mode, the intelligent charging and monitoring of the battery is difficult, and the battery charging of the shared battery car cannot be intelligently managed and monitored for abnormalities.

[0006] A detection and management system for energy storage batteries in a power exchange cabinet according to the present invention includes a control management box 2, a battery pack, a battery block charging mechanism and a plug-in charging head group;

[0007] The control management box 2 is provided with a control board, a detection management module, a charging module and a discharging module. The detection management module is connected to each battery in the battery pack through a monitoring line. The charging module is provided with a plurality of charging circuits. The plurality of charging circuits are electrically connected to the charging interface of each battery in the battery pack according to the charging capacity. The power supply interface of each battery in the battery pack is connected to the discharging module through a power supply wire. The discharging module is connected with a plug-in charging head group. The control board is used to control the detection management module, the charging module and the discharging module;

[0008] The battery pack includes a main battery and multiple auxiliary batteries, and the discharge module realizes power supply of different powers by adjusting the number of parallel connections of the main battery and the multiple auxiliary batteries;

[0009] The battery block charging mechanism includes a battery block plug-in board, a docking charging head box and a box body fixed-distance moving structure. The battery block plug-in board is provided with battery block slots distributed in a matrix. Two slide rails are arranged at the bottom of the power exchange cabinet. The bottom of the battery block plug-in board is stuck on the two slide rails. The battery block plug-in board can be pulled outward along the two slide rails. The two slide rails are provided with positioning lock holes. When the battery block plug-in board is fully pushed into the inner ends of the two slide rails, a lock block is inserted into the positioning lock hole to position the battery block plug-in board. The box body fixed-distance moving structure includes two mounting blocks, two limit slide rods, a screw rod and a servo motor. The two mounting blocks A limit slide bar is correspondingly connected between the two ends of the mounting block, and the docking charging head box is movably sleeved on the two limit slide bars near the two ends. A screw rod is connected to the middle position of the two mounting blocks, and the two ends of the screw rod are rotatably mounted on the mounting blocks. The screw rod spirally passes through the middle position of the docking charging head box. A servo motor is provided on the outside of one of the mounting blocks, and the rotating shaft of the servo motor is connected to one end of the screw rod. A row of docking charging heads is provided under the docking charging head box, and the docking charging head is installed on the docking charging head box through a lifting device. Several groups of charging circuits are divided on the charging module and correspondingly connected to each docking charging head;

[0010] The plug-in charging head group includes charging heads of various specifications, and the charging heads are connected to the discharge module through wires. When a charging head is docked with an electric vehicle, the charging mode corresponding to the charging head will be started. A touch panel is provided near the top of the front side wall of the power exchange cabinet 1. The touch panel is electrically connected to the control panel, and the charging mode corresponding to each charging head can be adjusted through the touch panel;

[0011] The detection management module is used to monitor the power of each battery in the battery pack in real time. After the electric vehicle battery is plugged into the battery block plug-in, the docking charging head below the docking charging head box will dock and charge the electric vehicle battery on the battery block plug-in in sequence. The detection management module first detects the specifications and remaining power of the electric vehicle battery, and then implements the corresponding charging mode.

[0012] In some embodiments of the present invention, the power of the main battery is twice that of the auxiliary battery, and the number of the auxiliary batteries is not less than 3. When charging the electric vehicle through the charging head corresponding to the plug-in charging head group, the charging of the main battery must be started. If the charging power requirement is high, the number of parallel auxiliary batteries is selected as needed to charge together with the main battery.

[0013] In some other embodiments of the present invention, when the auxiliary batteries are charged, priority is given to supplying power in parallel from the auxiliary batteries whose power levels are monitored to be from high to low;

[0014] If the auxiliary battery is detected to have a power level lower than 20% during the charging process or when not being charged, the automatic charging function will be started.

[0015] In other embodiments of the present invention, when the auxiliary battery is not used at night and the power level is monitored to be lower than 50%, automatic charging of the auxiliary battery lower than 50% will be initiated until the auxiliary battery is fully charged.

[0016] In other embodiments of the present invention, when the battery pack is used to charge an electric vehicle, when the battery power of the main battery and the auxiliary battery of the required optimal combination is less than 20%, and there is no spare battery to switch to meet the charging needs of the electric vehicle, the AC power supply charging will be started.

[0017] In other embodiments of the present invention, after the battery block plug board is fully plugged with electric vehicle batteries, the touch panel is used to activate the docking charging head box to charge immediately or to charge during a set time period.

[0018] In some other embodiments of the present invention, the main battery and the auxiliary battery monitor the discharge energy efficiency through the detection management module during each discharge process;

[0019] When the main battery and the auxiliary battery are new, the discharge energy when they are discharged from the remaining 90% to 30% is W1. Each time the main battery and the auxiliary battery are discharged, the discharge energy efficiency is calculated when the power is higher than 90%, that is, the discharge energy when the remaining 90% is discharged to 30% is calculated to be W2, and the corresponding battery discharge energy efficiency = W2 / W1*100%.

[0020] In other embodiments of the present invention, each battery block slot 62 on the battery block plug-in board is provided with a number in the control board. When the docking charger is docked to the electric vehicle battery, if charging is impossible or charging is abnormal, charging will be disconnected and the number corresponding to this battery block slot will be recorded. When the charged electric vehicle battery is taken out, the touch panel is used to check whether all charging is completed, and the number of the abnormal charging will be displayed.

[0021] In other embodiments of the present invention, a wireless transceiver module is provided on the control panel, and a reminder setting after all electric vehicle batteries are charged is set through the touch panel. After charging is completed, the wireless transceiver module sends charging completion information to the mobile terminal.

[0022] In the present invention, the main battery and multiple auxiliary batteries are monitored in real time through the detection management module. When the battery pack is used for charging, the control board performs optimal discharge to charge the electric vehicle according to the monitoring results of the detection management module. The main battery and multiple auxiliary batteries can also be monitored in each discharge process. The energy storage efficiency is easy to manage the battery. It is troublesome to remove the batteries from the shared electric vehicle for centralized charging management. Here, the detection management module is used to monitor the optimal charging of each shared electric vehicle battery in each charging process and whether there is any charging abnormality. The results can also be notified and sent in time, making management more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a battery swap cabinet for a detection and management system for energy storage batteries in a battery swap cabinet proposed by the present invention.

[0025] Figure 2 This is a structural schematic diagram of a battery storage battery in a battery swap cabinet and a battery charging position for a shared electric vehicle proposed in the present invention.

[0026] In the figure: 1. Battery exchange cabinet; 11. Touch panel; 12. Charging head; 13. Outward opening door of battery block plug-in plate; 2. Control management box; 3. Main battery; 4. Auxiliary battery; 5. Docking charging head box; 50. Docking charging head; 51. Screw rod; 52. Limit slide bar; 53. Servo motor; 6. Battery block plug-in plate; 61. Slide rail; 611. Positioning lock hole; 62. Battery block slot. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] like Figure 1-2 As shown, the present invention proposes a detection and management system for energy storage batteries in a power exchange cabinet, including a control management box 2, a battery pack, a battery block charging mechanism and a plug-in charging head group;

[0029] The control management box 2 is provided with a control board, a detection management module, a charging module and a discharging module. The detection management module is connected to each battery in the battery pack through a monitoring line. The charging module is provided with a plurality of charging circuits. The plurality of charging circuits are electrically connected to the charging interface of each battery in the battery pack according to the charging capacity. The power supply interface of each battery in the battery pack is connected to the discharging module through a power supply wire. The discharging module is connected with a plug-in charging head group. The control board is used to control the detection management module, the charging module and the discharging module;

[0030] The charging module is equipped with charging circuits of various specifications, which charge the internal battery pack and shared electric vehicle battery in corresponding modes. The purpose of the discharge module is to start charging in the combination mode inside the battery pack according to the charging power requirements of the charging head.

[0031] The battery pack includes a main battery 3 and multiple auxiliary batteries 4. The discharge module realizes power supply of different powers by adjusting the number of main batteries 3 and multiple auxiliary batteries 4 connected in parallel. Multiple auxiliary batteries 4 can be set up to meet the charging requirements of different charging modes by connecting the number of auxiliary batteries 4 in parallel according to the needs.

[0032] The battery block charging mechanism includes a battery block plug-in board 6, a docking charging head box 5 and a box body fixed-distance moving structure. The battery block plug-in board 6 is provided with battery block slots 62 in a matrix. Two slide rails 61 are arranged at the bottom of the power exchange cabinet 1. The bottom of the battery block plug-in board 6 is stuck on the two slide rails 61. The battery block plug-in board 6 can be pulled outward along the two slide rails 61. The two slide rails 61 are provided with positioning lock holes 611. When the battery block plug-in board 6 is fully pushed into the inner side ends of the two slide rails 61, a lock block is inserted into the positioning lock hole 611 to position the battery block plug-in board 6. The box body fixed-distance moving structure includes two mounting blocks, two limit slide rods 52, a screw rod 51 and a servo motor 53. Two A limit slide bar 52 is correspondingly connected between the two ends of the mounting block, and the docking charging head box 5 is movably sleeved on the two limit slide bars 52 near the two ends. A screw rod 51 is connected to the middle position of the two mounting blocks, and the two ends of the screw rod 51 are rotatably mounted on the mounting blocks. The screw rod 51 spirally penetrates the middle position of the docking charging head box 5. A servo motor 53 is provided on the outside of one of the mounting blocks, and the rotating shaft of the servo motor 53 is connected to one end of the screw rod 51. A row of docking charging heads 50 are provided below the docking charging head box 5. The docking charging head 50 is installed on the docking charging head box 5 through a lifting device. Several groups of charging circuits are divided on the charging module and correspondingly connected to each docking charging head 50;

[0033] For charging the batteries of shared electric vehicles, they are generally taken out and charged in a centralized manner at a charging station, but there is generally no monitoring device to manage and monitor the energy consumption of each battery and whether the charging is normal. In addition, the charging time is uncontrollable. Generally, charging is required as soon as the power is connected, and the charging time is uncontrollable. Here, the batteries are inserted one by one into the battery block slots 62 on the battery block plug board 6 (first open the outer door of the battery block plug board position, pull out the battery block plug board, and discharge the batteries one by one), and then pushed in, and the lock block is inserted into the positioning lock hole 611 to lock the battery block plug board 6 and wait for charging later. During charging, the docking charging head box 5 starts from one end position to dock the batteries in the row of battery block slots 62 below one by one, and then docks the charging head 50 below (the lifting device is a lifting cylinder to lift and dock the docking charging head 50), and a laser identifier is provided on the docking charging head box 5, and an identification code (not shown) is provided on the edge fan of the battery block plug board 6. When the laser identifier identifies, the surface is just aligned, or other identification position structures (not described here) are used.

[0034] Since the servo motor rotates a constant distance each time and the laser identifier can be fine-tuned back and forth, precise alignment is facilitated.

[0035] The plug-in charging head group includes charging heads 12 of various specifications, and the charging heads 12 are connected to the discharge module through wires. When a charging head 12 is docked with an electric vehicle, the charging mode corresponding to the charging head 12 will be started. A touch panel 11 is provided near the top of the front side wall of the power exchange cabinet 1. The touch panel 11 is electrically connected to the control panel, and the charging mode corresponding to each charging head can be adjusted through the touch panel 11;

[0036] The detection management module is used to monitor the power of each battery in the battery pack in real time. After the electric vehicle battery is plugged into the battery block plug-in board 6, the docking charging head 50 below the docking charging head box 5 will dock and charge the electric vehicle battery on the battery block plug-in board 6 in sequence. The detection management module first detects the specifications and remaining power of the electric vehicle battery, and then implements the corresponding charging mode.

[0037] The charging mode is set through the touch panel. The charging head 12 can be unified into one specification or multiple specifications. The charging head 12 can be disassembled and replaced. The charging head 12 (with a charging mode chip inside, the system recognizes the charging mode and charges after being plugged in) does not charge all the batteries at once, but charges them row by row. In this way, they can be charged slowly at night, taking full advantage of the low electricity price at night. Since the battery cannot be automatically ejected, it is enough to charge the batteries on the battery board with one battery block at night.

[0038] The main battery 3 has twice the power of the auxiliary battery 4. The number of the auxiliary batteries 4 is not less than 3. When charging the electric vehicle through the charging head 12 corresponding to the plug-in charging head group, the main battery 3 must be started to charge. If the charging power requirement is high, the number of parallel auxiliary batteries 4 can be selected as needed to charge together with the main battery 3. Multiple batteries can be connected in parallel to achieve different charging modes, without the need for a traditional battery to adjust the voltage or current through the control board (no DC converter is used), which will cause loss. It is also convenient to control and monitor each battery and manage charging.

[0039] When the auxiliary battery 4 is charged, priority is given to supplying power in parallel from the auxiliary battery 4 whose power level is monitored to be high to low;

[0040] If the auxiliary battery 4 is in the charging process or not being charged and the power level is detected to be lower than 20%, the automatic charging function will be started.

[0041] When using multiple batteries, the battery charging and discharging should be reasonably distributed, otherwise, the batteries will have different usage times, and some batteries will quickly reduce their service life. The battery power should not be charged when it is too low, otherwise, it will be drained.

[0042] When the auxiliary battery 4 is not used at night and the power level is detected to be lower than 50%, the auxiliary battery 4 with power lower than 50% will be automatically charged until it is fully charged.

[0043] When not in use, there is a requirement for the battery power for the next charge. If it is set to more than 50%, it can be temporarily left without charging. Of course, it can be set to 70% or higher.

[0044] When the battery pack is used to charge an electric vehicle, when the battery power of the main battery 3 and the auxiliary battery 4 of the optimal combination is less than 20%, and there is no spare battery to switch to meet the charging needs of the electric vehicle, the AC power supply charging will be started.

[0045] When using battery charging, when the battery power is less than 20%, do not switch batteries, try to switch to AC power charging, otherwise, the battery power will be too low, which will damage the battery, resulting in reduced battery life or power failure.

[0046] After the battery block plug board 6 is fully plugged with electric vehicle batteries, the docking charging head box 5 is started to charge immediately or charge in a set time period through the touch panel 11. Time period charging can be started, so that low-peak charging can be achieved, and charging costs may also be reduced.

[0047] During each discharge process, the main battery 3 and the auxiliary battery 4 monitor the discharge energy efficiency through the detection management module;

[0048] When the main battery 3 and the auxiliary battery 4 are new batteries, the discharge energy when they are discharged from the remaining 90% to 30% is W1. Each time the main battery and the auxiliary battery are discharged, the discharge energy efficiency is calculated when the power is higher than 90%, that is, the discharge energy when the remaining 90% is discharged to 30% is calculated to be W2, and the corresponding battery discharge energy efficiency = W2 / W1*100%.

[0049] The battery includes charging efficiency and discharging efficiency, but the discharge efficiency can reflect the charging efficiency. If a battery has a high discharge efficiency, its charging efficiency will also be correspondingly higher. However, it can also be set to monitor the charging efficiency of the battery (how much electricity is needed to charge a new battery from 30% to 90%, and how much electricity is needed to charge from 30% to 90% now for comparison).

[0050] Each battery block slot 62 on the battery block plug-in board 6 is provided with a number in the control panel. When the docking charger 50 is docked to the electric vehicle battery, if charging is not possible or charging is abnormal, charging will be disconnected and the number corresponding to this battery block slot 62 will be recorded. When the charged electric vehicle battery is taken out, the touch panel 11 is used to check whether all charging is completed, and the number of the abnormal charging will be displayed.

[0051] You can understand the charging status of each battery so that you can handle abnormal batteries later. You can monitor and manage the batteries during the charging process to find out unqualified batteries for later maintenance.

[0052] The control panel is provided with a wireless transceiver module, and a reminder setting after all the electric vehicle batteries are charged is set through the touch panel. After charging is completed, the wireless transceiver module sends charging completion information to the mobile terminal.

[0053] It can receive charging status information remotely, replace the battery with a new one immediately for charging or perform emergency handling in case of abnormality.

[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A detection and management system for energy storage batteries in a power exchange cabinet, characterized in that: It comprises a control management box (2), a battery pack, a battery block charging mechanism and a plug-in charging head group; The control management box (2) is provided with a control panel, a detection management module, a charging module and a discharging module. The detection management module is connected to each battery in the battery pack via a monitoring line. The charging module is provided with a plurality of charging circuits. The plurality of charging circuits are electrically connected to the charging interface of each battery in the battery pack according to the charging capacity. The power supply interface of each battery in the battery pack is connected to the discharging module via a power supply wire. The discharging module is connected to a plug-in charging head group. The control panel is used to control the detection management module, the charging module and the discharging module. The battery pack comprises a main battery (3) and a plurality of auxiliary batteries (4), and the discharge module realizes power supply of different powers by adjusting the number of the main battery (3) and the plurality of auxiliary batteries (4) connected in parallel; The battery block charging mechanism comprises a battery block plug plate (6), a docking charging head box (5) and a box body fixed distance moving structure. The battery block plug plate (6) is provided with battery block slots (62) arranged in a matrix. Two slide rails (61) are arranged at the bottom of the power exchange cabinet (1). The bottom of the battery block plug plate (6) is stuck on the two slide rails (61). The battery block plug plate (6) can be pulled outward along the two slide rails (61). The two slide rails (61) are provided with positioning lock holes (611). When the battery block plug plate (6) is completely pushed into the inner side ends of the two slide rails (61), a lock block is inserted into the positioning lock hole (611) to position the battery block plug plate (6). The box body fixed distance moving structure comprises two mounting blocks, two limit slide bars (52), a screw rod (51) and a servo motor (53). ), a limit slide bar (52) is correspondingly connected between the two ends of the two mounting blocks, the docking charging head box (5) is movably sleeved on the two limit slide bars (52) near the two end positions, a screw rod (51) is connected to the middle position of the two mounting blocks, and the two ends of the screw rod (51) are rotatably mounted on the mounting blocks, and the screw rod (51) spirally penetrates the middle position of the docking charging head box (5), a servo motor (53) is provided on the outer side of one of the mounting blocks, and the rotating shaft of the servo motor (53) is connected to one end of the screw rod (51), a row of docking charging heads (50) is provided below the docking charging head box (5), and the docking charging head (50) is installed on the docking charging head box (5) through a lifting device, and several groups of charging circuits are divided on the charging module and correspondingly connected to each docking charging head (50); The plug-in charging head group comprises charging heads (12) of various specifications, the charging heads (12) are connected to the discharge module through wires, and when a charging head (12) is docked with the electric vehicle, the charging mode corresponding to the charging head (12) is started, and a touch panel (11) is provided near the top of the front side wall of the power exchange cabinet (1), and the touch panel (11) is electrically connected to the control panel, and the charging mode corresponding to each charging head can be adjusted through the touch panel (11); The detection management module is used to monitor the power of each battery in the battery pack in real time. After the electric vehicle battery is plugged into the battery block plug board (6), the docking charging head (50) below the docking charging head box (5) will dock and charge the electric vehicle battery on the battery block plug board (6) in sequence. The detection management module first detects the specifications and remaining power of the electric vehicle battery, and then implements the corresponding charging mode.

2. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 1, characterized in that: The power of the main battery (3) is twice that of the auxiliary battery (4), and the number of the auxiliary batteries (4) is not less than 3. When the electric vehicle is charged through the charging head (12) corresponding to the plug-in charging head group, the main battery (3) must be started for charging. If the charging power requirement is high, the number of auxiliary batteries (4) connected in parallel is selected according to the needs to be charged together with the main battery (3).

3. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 2, characterized in that: When the auxiliary storage battery (4) is charged, priority is given to supplying power in parallel from the auxiliary storage battery (4) whose power level is monitored to be from high to low; If the auxiliary battery (4) detects that the power level is lower than 20% during the charging process or when it is not charged, the automatic charging function will be started.

4. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 2, characterized in that: When the auxiliary battery (4) is not used at night and it is detected that the power level is lower than 50%, the auxiliary battery (4) with power lower than 50% will be automatically charged until it is fully charged.

5. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 2, characterized in that: When the battery pack is used to charge an electric vehicle, when the battery power of the main battery (3) and the auxiliary battery (4) of the optimal combination is less than 20%, and there is no spare battery to switch to meet the charging needs of the electric vehicle, the mains power supply charging will be started.

6. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 1, characterized in that: After the battery block plug board (6) is fully plugged with electric vehicle batteries, the docking charging head box (5) is activated through the touch panel (11) to charge immediately or charge in a set time period.

7. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 1, characterized in that: During each discharge process, the main battery (3) and the auxiliary battery (4) monitor the discharge energy efficiency through the detection management module; When the main battery (3) and the auxiliary battery (4) are new batteries, the discharge energy when they are discharged from the remaining 90% to 30% is W1. Each time the main battery and the auxiliary battery are discharged, the discharge energy efficiency is calculated when the power is higher than 90%, that is, the discharge energy when the remaining 90% is discharged to 30% is calculated to be W2, and the corresponding battery discharge energy efficiency = W2 / W1*100%.

8. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 1, characterized in that: Each battery block slot (62) on the battery block plug board (6) is provided with a number in the control panel. When the docking charger (50) is docked to the electric vehicle battery, if charging is impossible or charging is abnormal, charging will be disconnected and the number corresponding to the battery block slot (62) will be recorded. When the charged electric vehicle battery is taken out, the touch panel (11) is used to check whether all charging is completed, and the number of the abnormal charging will be displayed.

9. A detection and management system for energy storage batteries in a power exchange cabinet according to claim 8, characterized in that: The control panel is provided with a wireless transceiver module, and a reminder setting after all the electric vehicle batteries are charged is set through the touch panel. After charging is completed, the wireless transceiver module sends charging completion information to the mobile terminal.

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