Multi-battery device and method for prolonging service time and battery life

Abstract

The invention relates to the field of charging devices, in particular to a multi-battery device and method for prolonging service time and battery life, and the device comprises a main battery, a standby battery, a battery management unit and a switching unit; the battery management unit controls the switching unit to perform use and charging management on the main battery and the standby battery; the main battery and the standby battery do not need to be in the same device, and a power line is introduced into the switching unit; the battery management unit controls the switching unit to alternately perform pulse charging and stable charging on the main battery and the standby battery during use charging, and performs management; the battery management unit reads the voltage and power consumption of the main battery in real time to obtain the residual electric quantity, and starts to supply power with the standby battery in turn when the residual electric quantity of the main battery is lower than 75%, so that the service time of the device is prolonged. And if the battery has a memory effect, the battery is completely exhausted by small current and then is charged. And if the battery is not recovered, the battery is charged for multiple times with large current during next charging, and the usable time of each battery is recovered.

Description

Technical Field

[0001] The present invention relates to the field of charging devices, and in particular to a multi-battery device and method for extending the use time and battery life. Background Art

[0002] Every mobile device has a battery, and some even have a backup battery. Often, the battery life is not long enough and the battery life ages prematurely due to the wrong charging method. The memory effect of the battery is mainly due to the fact that when the battery is partially charged and discharged incompletely, the cadmium grains inside the battery will aggregate into blocks, forming secondary discharge channels. This effect will gradually reduce the capacity of the battery, resulting in a shortened service life. To eliminate the memory effect of the battery, the following methods can be used: one is to use a small current for deep discharge, such as discharging the battery to 0V; the other is to use a large current to charge and discharge several times. In addition, the memory effect of the battery is a reversible failure, that is, the battery can recover its performance after failure, but it requires a specific operating cycle to activate.

[0003] The present invention records the charging and discharging of the battery at all times. If the battery has a memory effect, it will first restore the battery to full power before charging. If the recovery is still not complete, the next time it is charged, it will be charged multiple times with a large current to restore the usable time of each battery. The pulse charger has the following advantages and disadvantages: Improve charging efficiency: The pulse charger can more effectively adjust the charging current and voltage of the battery by introducing high-frequency pulse current, thereby improving charging efficiency and shortening charging time. Extend battery life: This charger can better manage the charging and discharging process of the battery, thereby extending the battery's service life.

[0004] However, pulse charging has the disadvantage of electromagnetic interference: the pulse charger introduces high-frequency pulse current during the charging process, which may cause electromagnetic interference and affect the normal operation of surrounding electronic equipment. Therefore, Zhang Zhizhong must prevent and control it. It is also possible that the measurement of power is not accurate and the charging accuracy is not accurate. Due to the use of nonlinear charging methods, there is a certain error in the charging accuracy, which may affect the charging and discharging process of the battery. Therefore, the invention is not continuous pulse charging, but alternating pulse charging with stable charging. The power is measured during stable charging, which can simultaneously ensure power measurement and monitoring and fast and effective charging.

[0005] Wearable devices need to be charged, and sometimes require a long standby time, but in many environments they cannot be charged immediately, or the battery may run out and there is no chance to charge when urgently needed. In the above background, the multi-battery of the present invention can be replaced in time, solving the problem that wearable devices need to be charged, but in many environments they cannot be charged immediately, or the battery may run out and there is no chance to charge when urgently needed. Summary of the invention

[0006] The present invention relates to the field of charging technology, and specifically to a multi-battery device and method for extending the use time and battery life. The multi-battery device includes a main battery, a backup battery, a battery management unit and a switching unit; the battery management unit controls the switching unit to manage the use and charging of the main battery and the backup battery; the main battery and the backup battery do not need to be in the same device, and a power line is used to introduce the switching unit, and there is one or more backup batteries; the battery management unit controls the switching unit to alternate between pulse charging and stable charging when the main battery and the backup battery are used and charged.

[0007] One is the main battery, which is controlled by the battery management unit to manage the use and charging of the main battery. The battery management unit reads the voltage and power consumption of the main battery to obtain the remaining power. When the remaining power of the main battery is less than 75%, it starts to supply power in turn with the backup battery, thereby extending the use time of the device and reducing the number of times the main battery is charged.

[0008] The second is the backup battery. The backup battery is controlled by the battery management unit to switch the unit to manage the use and charging of the main battery and the backup battery. The battery management unit reads the voltage and power consumption of the main battery and the backup battery to obtain the remaining power. When the remaining power of the main battery is less than 75%, it starts to control the main battery and the backup battery to supply power in turn, thereby extending the use time of the device and reducing the number of times the main battery is charged.

[0009] The third is the battery management unit, which controls the switching unit to manage the use and charging of the main battery and the backup battery. The battery management unit reads the voltage and power consumption of the main battery and the backup battery to obtain the remaining power. When the remaining power of the main battery is less than 75%, it starts to control the main battery and the backup battery to supply power in turn, and pulse charging and stable charging are alternated during charging. The replacement work is adjusted according to the number of charging cycles of the main battery and each backup battery.

[0010] The fourth is the switching unit, which is between the main battery, backup battery and battery management unit. The battery management unit controls the switching unit to manage the use and charging of the main battery and the backup battery. The battery management unit reads the voltage and power consumption of the main battery and the backup battery to obtain the remaining power. When the remaining power of the main battery is less than 75%, it starts to control the main battery and the backup battery to supply power in turn, thereby extending the use time of the device and reducing the number of times the main battery is charged.

[0011] Among them, the preferred solution is to stop charging immediately when the battery voltage drops during charging. Since the battery is fully charged, the excess electrical energy is converted into heat energy, which continues to damage the battery. At this time, the remaining battery power is corrected to 100%.

[0012] Among them, the preferred scheme is that there is one or more backup batteries; a cover is added to the surface of the main wearable device, and a solar device is added to the inside of the cover to charge the main battery inside the main wearable device; after the cover is opened, the display screen of the main wearable device can be seen; a solar device is added around the cover inside the main wearable device; there are solar devices on both sides of the cover, and the cover has one or more folding wings, and solar devices are added to the folding wings.

[0013] The present invention also includes a method for extending the use time and battery life of a multi-battery device, wherein the multi-battery device includes a main battery, a backup battery, a battery management unit and a switching unit; the battery management unit controls the switching unit to manage the use and charging of the main battery and the backup battery; the control method steps are: S1 Set the number of times each battery can be charged: including the number of times the main battery and each backup battery can be charged, according to the number of times specified in the specification, input to the battery management unit; the default value is 1000 times; S2 Read the main battery voltage and evaluate the remaining power: read the main battery discharge parameters and voltage corresponding parameters in advance, read the main battery voltage and then evaluate its remaining power; when the main battery is exhausted, reset and calibrate its remaining power; S3 reads the voltage of each backup battery and evaluates the remaining power: Read the discharge parameters of each backup battery and compare the voltage in advance, and the battery will be reset to zero each time it is exhausted; S4 determines whether to switch: determines the voltage of the main battery and evaluates whether the remaining power is less than 75%, if it is greater, the main battery is maintained; and maintained in S4; S5 main and backup battery switching: according to the number of cycles each battery can be charged, the timing of switching is determined, and the battery with the most cycles is used up first; S6 Remaining battery switching: switch the timing of use according to the number of cycles each battery can be charged, so that the battery with the most cycles is exhausted first; S7 last used battery: the battery with the least number of charges is fully consumed; S8 is charging: charging the main battery and backup battery at the same time, alternating pulse charging and steady charging during charging; S9 maintenance charging: For batteries with a remaining power of more than 75%, only maintenance charging is performed without fast charging. S10 resumes use: returns to S1 after charging.

[0014] Among them, the preferred solution is to switch the main and standby batteries, and switch the timing of use according to the number of rechargeable cycles of each battery. Wait until the battery with a larger number of rechargeable cycles is exhausted first, and then switch to the battery with a smaller number of rechargeable cycles. When the remaining number of rechargeable cycles of all batteries is close, they are switched in turn. When switching, they will be charged together first, and then the original power supply battery will be disconnected after the replacement battery is stable. If the replacement battery does not exist or is low on power, the secondary replacement battery will be switched.

[0015] Among them, the preferred solution is that the remaining batteries are switched according to the number of times each battery can be charged, and the timing of switching is to wait until the batteries with more charging cycles are exhausted first; improving charging efficiency: the pulse charger can more effectively adjust the charging current and voltage of the battery by introducing high-frequency pulse current, thereby improving charging efficiency and shortening charging time.

[0016] Among them, the preferred solution is maintenance charging: for those with a remaining power higher than 75%, only maintenance charging is performed without fast charging; the battery charging and discharging is recorded at all times, and if the battery has a memory effect, a small current will be used to drain the battery completely before charging; if the recovery is still not completed, the next time it is charged, a large current will be used for multiple times to restore the usable time of each battery.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The battery charging and discharging are recorded at all times. If the battery has a memory effect, the battery will be completely exhausted before charging. If the recovery is still not completed, the next time it is charged, it will be charged multiple times with a large current to restore the usable time of each battery. 2. The pulse charging technology is used to improve the charging efficiency. The pulse charger can more effectively adjust the charging current and voltage of the battery by introducing high-frequency pulse current, thereby improving the charging efficiency, shortening the charging time, and extending the battery life: This charger can better manage the charging and discharging process of the battery, thereby extending the service life of the battery. 3. Although pulse charging has the disadvantage of electromagnetic interference, the pulse charger introduces high-frequency pulse current during the charging process, which may generate electromagnetic interference and affect the normal operation of surrounding electronic equipment. Therefore, a suppression circuit must be added to the device to prevent it. 4. The phenomenon of inaccurate charging accuracy due to pulse charging. Due to the use of a nonlinear charging method, there is a certain error in the charging accuracy, which may affect the charging and discharging process of the battery. Therefore, the invention is not continuous pulse charging, but pulse charging and stable charging alternately. The power is measured during stable charging, which can simultaneously ensure power measurement and monitoring and fast and effective charging. 5. Wearable devices need to be charged, and sometimes require a long standby time, but in many environments they cannot be charged immediately, or the battery may run out and there is no chance to charge when urgently needed. The above background uses the multi-battery of the present invention to be replaced in time, solving the problem that wearable devices need to be charged, but in many environments they cannot be charged immediately, or the battery may run out and there is no chance to charge when urgently needed. 6. Solve the problem of using a backup battery to restore the function of the device when there is no charging device. 7. The backup battery can rely on sunlight to gradually restore the power function, and the communication mode can be changed to Beidou short message, which can be used as a global positioning system; taking into account the characteristics of long-term standby work, it is suitable for use by combat infantry and paratroopers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An organizational chart for a multi-battery device that extends usage time and battery life; Figure 2 A schematic diagram of different mobile devices of a multi-battery device for extending the usage time and battery life; Figure 3 A schematic diagram of alternate charging of a multi-battery device for extending the usage time and battery life; Figure 4 A schematic diagram of multiple backup batteries of a multi-battery device for extending the usage time and battery life; Figure 5 A solar schematic diagram of a multi-battery device that extends usage time and battery life; Figure 6A schematic diagram of the steps of a method for extending the usage time and battery life; Figure 7 A schematic diagram of a switching unit for extending usage time and battery life.

[0019] Explanation of the symbols in the accompanying drawings: 10-main battery; 20-backup battery; 21-second backup battery; 23-third backup battery; 24-fourth backup battery; 28-solar device; 30-battery management unit; 50-switching unit; 52-pulse charging control unit; 54-maintenance charging control unit; 56-stable charging control unit; 60-power cord; 70-charger power supply; 100-wearable device; 200-multi-battery device. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The implementation, functional features and advantages of the present invention will be described in conjunction with the embodiments and with reference to the attached drawings. Figures 1 to 7 Further explanation. The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Reference Figure 1 In one embodiment of the present invention, the invention is specifically a multi-battery device and method for extending the use time and battery life. The multi-battery device 200 includes a main battery 10, a backup battery 20, a battery management unit 30 and a switching unit 50; the battery management unit 30 controls the switching unit 50 to use and charge the main battery 10 and the backup battery 20; refer to the attached Figure 2 The main battery 10 and the backup battery 20 do not need to be in the same mobile device 100. The power line 60 is used to introduce the switching unit 50. There can be one or more backup batteries 20, and a second backup battery 21 can be added. Figure 3 The battery management unit 30 controls the switching unit 50 to perform pulse charging 80 and stable charging 82 on the main battery 10 and the backup battery 20 during use. Most of the time, pulse charging 80 is performed, and stable charging 82 is performed at intervals. During stable charging 82, the voltage is stable.

[0022] One is the main battery 10, see attached Figure 1The main battery 10 is controlled by the battery management unit 30 to manage the use and charging of the main battery 10; the battery management unit 30 reads the voltage and power consumption of the main battery 10 to obtain the remaining power, and when the remaining power of the main battery is less than 75%, it starts to supply power in turn with the backup battery 20, thereby extending the use time of the device and reducing the number of times the main battery is charged.

[0023] The second is a backup battery 10, see attached Figure 1 , the backup battery 10 is controlled by the battery management unit 30 to control the switching unit 50 to manage the use and charging of the main battery 10 and the backup battery; the battery management unit 30 reads the voltage and power consumption of the main battery 10 and the backup battery 10 to obtain the remaining power, and when the remaining power of the main battery is less than 75%, it starts to control the main battery 10 and the backup battery 20 to supply power in turn, so that the use time of the device is extended; the number of times the main battery is charged is reduced; refer to the attached Figure 4 There can be more than one backup battery. A multi-battery device 200 can have a main battery 10, a backup battery 20, a second backup battery 21, a third backup battery 23 and a fourth backup battery 24; they are connected by a 60-power line, and the battery management unit 30 is used to control the switching unit 50 to optimize the standby time of the multi-battery device 200.

[0024] The third is the battery management unit 30, see the attached Figure 1 The battery management unit 30 controls the switching unit 50 to manage the use and charging of the main battery 10 and the backup battery; the battery management unit 30 reads the voltage and power consumption of the main battery 10 and the backup battery 10 to obtain the remaining power, and when the remaining power of the main battery is lower than 75%, it starts to control the main battery 10 and the backup battery 20 to supply power in turn, and pulse charging and stable charging are alternated during charging; the replacement work is adjusted according to the number of times the main battery 10 and each backup battery 20 can be charged cyclically.

[0025] The fourth is the switching unit 50, see the attached Figure 1 The switching unit 50 is between the main battery 10, the backup battery and the battery management unit 30. The battery management unit 30 controls the switching unit 50 to manage the use and charging of the main battery 10 and the backup battery. The battery management unit 30 reads the voltage and power consumption of the main battery 10 and the backup battery 10 to obtain the remaining power. When the remaining power of the main battery is less than 75%, it starts to control the main battery 10 and the backup battery 20 to supply power in turn, thereby extending the use time of the device and reducing the number of times the main battery is charged.

[0026] Among them, the preferred solution is that there is one or more backup batteries (10); refer to the attached Figure 4There can be more than one backup battery. A multi-battery device 200 can have a main battery 10, a backup battery 20, a second backup battery 21, a third backup battery 23 and a fourth backup battery 24; they are connected by a 60-power line, and the battery management unit 30 is used to control the switching unit 50 to optimize the standby time of the multi-battery device 200. Figure 5 A solar device 28 is added to the surface of each backup battery 20 to charge each backup battery 20.

[0027] The present invention also includes a method for extending the use time and battery life of a multi-battery device, wherein the multi-battery device includes a main battery 10, a backup battery 20, a battery management unit 30 and a switching unit (50); the battery management unit 30 controls the switching unit 50 to manage the use and charging of the main battery 10 and the backup battery (20); refer to the attached Figure 6 The control method steps are as follows: S1 sets the number of times each battery can be charged cyclically: including the number of times the main battery and each backup battery can be charged cyclically, according to the number of times specified in the specification, input to the battery management unit; the default value is 1000 times; S2 Read the main battery voltage and evaluate the remaining power: read the main battery discharge parameters and voltage corresponding parameters in advance, read the main battery voltage and then evaluate its remaining power; when the main battery is exhausted, reset and calibrate its remaining power; S3 reads the voltage of each backup battery and evaluates the remaining power: Read the discharge parameters of each backup battery and compare the voltage in advance, and the battery will be reset to zero each time it is exhausted; S4 determines whether to switch: determines the voltage of the main battery and evaluates whether the remaining power is less than 75%, if it is greater, the main battery is maintained; and maintained in S4; S5: Switching between the primary and backup batteries: switching the timing of use according to the number of times each battery can be charged, and wait until the battery with the most number of charging cycles is exhausted first; S6: Switching the remaining battery: switching the use time according to the number of cycles of charging of each battery, so that the battery with more cycles of charging is exhausted first; S7: Last battery used: The battery with the least number of charges is fully consumed; S8: Charging: charging the main battery and the auxiliary battery at the same time, alternating between pulse charging and stable charging; S9: Maintenance charging: For batteries with a remaining power of more than 75%, only maintenance charging is performed without fast charging. S10: Resume use: Return to S1 after charging.

[0028] Among them, the preferred solution is to switch the main and standby batteries, and switch the timing of use according to the number of rechargeable cycles of each battery. Wait until the battery with a larger number of rechargeable cycles is exhausted first, and then switch to the battery with a smaller number of rechargeable cycles. When the remaining number of rechargeable cycles of all batteries is close, they are switched in turn. When switching, they will be charged together first, and then the original power supply battery will be disconnected after the replacement battery is stable. If the replacement battery does not exist or is low on power, the secondary replacement battery will be switched.

[0029] Among them, the preferred solution is that the remaining batteries are switched according to the number of times each battery can be charged, and the timing of switching is to wait until the batteries with more charging cycles are exhausted first; improving charging efficiency: the pulse charger can more effectively adjust the charging current and voltage of the battery by introducing high-frequency pulse current, thereby improving charging efficiency and shortening charging time.

[0030] Among them, the preferred solution is that the switching unit 50, refer to the attached Figure 7 The switching unit 50 is between the main battery 10, the backup battery and the battery management unit 30. The battery management unit 30 controls the switching unit 50 to manage the charging of the main battery 10 and the backup battery. The switching unit 50 includes a pulse charging control unit 52, a maintenance charging control unit 54 and a stable charging control unit 56. The charger power supply 70 controlled by the battery management unit 30 manages the charging voltage of the main battery 10 and the backup battery 10. There are three stages: pulse charging, stable charging and maintenance charging, so that the battery can be used normally without reducing the number of times the battery can be charged.

[0031] Among them, the preferred solution is maintenance charging: for those with a remaining power higher than 75%, only maintenance charging is performed without fast charging; the battery charging and discharging is recorded at all times, and if the battery has a memory effect, a small current will be used to drain the battery completely before charging; if the recovery is still not completed, the next time it is charged, a large current will be used for multiple times to restore the usable time of each battery.

[0032] The preferred solution is to record the battery charging and discharging in real time. If the battery has a memory effect, it will be fully exhausted with a small current before charging. If the battery is still not fully recovered, it will be charged multiple times with a large current the next time to recover the usable time of each battery.

[0033] Among them, the preferred solution is to use pulse charging technology to improve charging efficiency. The pulse charger can more effectively adjust the charging current and voltage of the battery by introducing high-frequency pulse current, thereby improving charging efficiency, shortening charging time, and extending battery life: this charger can better manage the battery's charging and discharging process, thereby extending the battery's service life.

[0034] Among them, the preferred solution is that although pulse charging has the disadvantage of electromagnetic interference, the pulse charger introduces high-frequency pulse current during the charging process, which may generate electromagnetic interference and affect the normal operation of surrounding electronic equipment. Therefore, a suppression circuit must be added to the device to prevent it.

[0035] Among them, the preferred solution is that the voltage measurement is not accurate due to pulse charging. Due to the nonlinear charging method, there is a certain error in the charging accuracy, which may affect the charging and discharging process of the battery. Figure 3 Therefore, the invention is not continuous pulse charging, but pulse charging and stable charging alternately, and the power is measured during stable charging, which can ensure power measurement and monitoring while fast and effective charging.

[0036] Among them, the preferred solution is that wearable devices need to be charged and sometimes require a long standby time, but in many environments they cannot be charged immediately, or the power may be used up and there is no chance to charge when urgently needed; the above background uses the multiple batteries of the present invention to be replaced in time, solving the problem that wearable devices need to be charged, but in many environments they cannot be charged immediately, or the power may be used up and there is no chance to charge when urgently needed.

[0037] Among them, the preferred solution is to use a backup battery to restore the device to its functional state when there is no charging device.

[0038] Among them, the preferred solution is that the backup battery can rely on sunlight to gradually restore its power function, and the communication method is changed to Beidou short message, which can be used as a global positioning system; taking into account the characteristics of long-term standby work, it is suitable for use by combat infantry and paratrooper units.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0040] 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 multi-battery device and method for extending the usage time and battery life, characterized in that: The multi-battery device comprises a main battery (10), a backup battery (20), a battery management unit (30) and a switching unit (50); the battery management unit (30) controls the switching unit (50) to manage the use and charging of the main battery (10) and the backup battery (20); the main battery (10) and the backup battery (20) do not need to be in the same device, and are introduced into the switching unit (50) using a power line (60), and there is one or more backup batteries (20); the battery management unit (30) controls the switching unit (50) to alternate between pulse charging and stable charging when charging the main battery (10) and the backup battery (20).

2. The multi-battery device according to claim 1, characterized in that: The main battery (10) is controlled by a battery management unit (30) to control a switching unit (50) to manage the use and charging of the main battery (10); the battery management unit (30) reads the voltage and power consumption of the main battery (10) to obtain the remaining power, and when the remaining power of the main battery is less than 75%, it starts to supply power in turn with the backup battery (20), thereby extending the use time of the device and reducing the number of times the main battery is charged.

3. The multi-battery device according to claim 1, characterized in that: The backup battery (10) is controlled by a battery management unit (30) to control a switching unit (50) to manage the use and charging of the main battery (10) and the backup battery; the battery management unit (30) reads the voltage and power consumption of the main battery (10) and the backup battery (10) to obtain the remaining power, and when the remaining power of the main battery is less than 75%, it starts to control the main battery (10) and the backup battery (20) to supply power in turn, thereby extending the use time of the device and reducing the number of times the main battery is charged; and a solar device (28) is added to the surface of each backup battery (20) to charge each backup battery (20).

4. The multi-battery device according to claim 1, characterized in that: The battery management unit (30) controls the switching unit (50) to manage the use and charging of the main battery (10) and the backup battery; the battery management unit (30) reads the voltage and power consumption of the main battery (10) and the backup battery (10) to obtain the remaining power, and when the remaining power of the main battery is less than 75%, starts to control the main battery (10) and the backup battery (20) to supply power in turn, and pulse charging and stable charging are alternated during charging; and the replacement operation is adjusted according to the number of cyclic charging times of the main battery (10) and each backup battery (20).

5. The multi-battery device according to claim 1, characterized in that: The switching unit (50) is between the main battery (10), the backup battery and the battery management unit (30), and the battery management unit (30) controls the switching unit (50) to manage the use and charging of the main battery (10) and the backup battery (10); the battery management unit (30) reads the voltage and power consumption of the main battery (10) and the backup battery (10) to obtain the remaining power, and when the remaining power of the main battery is less than 75%, it starts to control the main battery (10) and the backup battery (20) to supply power in turn, thereby extending the use time of the device; the switching unit 50 for reducing the number of times the main battery is charged, the switching unit (50) includes a charging voltage control unit 52 which is controlled by the battery management unit 30 to manage the charging voltage of the main battery 10 and the backup battery 10, and has three stages: pulse charging, stable charging and maintenance charging, so that the battery can be used normally without reducing the number of times the battery can be charged.

6. The multi-battery device according to claim 1, characterized in that: The backup battery (10) has one or more than one; a cover plate (37) is added to the surface of the main wearable device (30), and a solar device (31) is added to the inner side of the cover plate (37) to charge the main battery (36) inside the main wearable device (30); after the cover plate is opened, the display screen of the main wearable device (30) can be seen; a solar device (31) is added to the periphery of the cover plate inside the main wearable device (30); the cover plate has solar devices (31) on both sides, and the cover plate has one or more folding wings, and the solar device (31) is added to the folding wings.

7. A method for extending the use time and battery life of a multi-battery device, characterized in that: The multi-battery device includes a main battery 10, a backup battery 20, a battery management unit 30 and a switching unit 50; the battery management unit 30 controls the switching unit 50 to manage the use and charging of the main battery 10 and the backup battery 20; the control method steps are: S1 Set the number of times each battery can be charged: including the number of times the main battery and each backup battery can be charged, according to the number of times specified in the specification, input to the battery management unit; the default value is 1000 times; S2 Read the main battery voltage and evaluate the remaining power: read the main battery discharge parameters and voltage corresponding parameters in advance, read the main battery voltage and then evaluate its remaining power; when the main battery is exhausted, reset and calibrate its remaining power; S3 reads the voltage of each backup battery and evaluates the remaining power: Read the discharge parameters of each backup battery and compare the voltage in advance, and the voltage will be reset to zero each time the battery is exhausted; S4 determines whether to switch: determines the voltage of the main battery and evaluates whether the remaining power is less than 75%, if it is greater, the main battery is maintained; and maintained in S4; S5 main and backup battery switching: according to the number of cycles each battery can be charged, the timing of switching is determined, and the battery with the most cycles is used up first; S6 Remaining battery switching: according to the number of cycles each battery can be charged, the timing of use is switched, and the battery with the most cycles is exhausted first; S7 last used battery: the battery with the least number of charges is fully consumed; S8 is charging: charging the main battery and the backup battery at the same time, alternating between pulse charging and stable charging; S9 maintenance charging: For batteries with a remaining power of more than 75%, only maintenance charging is performed without fast charging. S10 resumes use: returns to S1 after charging.

8. The method according to claim 7, characterized in that The main and standby batteries are switched according to the number of rechargeable cycles of each battery. The battery with a larger number of rechargeable cycles is consumed first, and then the battery with a smaller number of rechargeable cycles is switched. When the remaining number of rechargeable cycles of all batteries is close, they are switched in turn. When switching, they are charged together first, and the original power supply battery is disconnected after the replacement battery is stable. If the replacement battery does not exist or is low on power, the secondary replacement battery is switched.

9. The method according to claim 7, characterized in that: The remaining charged batteries are switched according to the number of times each battery can be charged cyclically, and the timing of switching is such that the batteries with more charging cycles are consumed first. Improving charging efficiency: The pulse charger can more effectively adjust the charging current and voltage of the battery by introducing high-frequency pulse current, thereby improving charging efficiency and shortening charging time.

10. The method according to claim 7, characterized in that For batteries with a remaining power higher than 75%, only maintenance charging will be performed without fast charging. The battery charging and discharging will be recorded at all times. If the battery has a memory effect, a small current will be used to drain the battery completely before charging it again. If the battery is still not fully recovered, a large current will be used for multiple times during the next charge to recover the usable time of each battery. If the battery voltage drops during charging, charging will be stopped immediately. The battery will be fully charged and the excess electrical energy will be converted into heat energy, which will continue to damage the battery. At this time, the remaining power of the battery will be corrected to 100%.

Images