A multi-battery power supply board for lamps and a power supply method thereof

Abstract

The present invention discloses a multi-battery power supply board for lamps, which relates to power supply management of lamps with self-power supply, and solves the technical problem that fatigue attenuation is prone to occur because the battery pack is always in a working state. It includes an MCU module, a power management module and a drive module; the power management module includes a solar power generation panel control unit and multiple battery control units; the control ends of the multiple battery control units are connected to the multiple control pins of the MCU module in a one-to-one correspondence, and the output ends of the multiple battery control units are connected in parallel to the output ends of the solar power generation panel control unit; the multiple signal acquisition pins of the MCU module are connected to the solar power generation panel and the positive output ends of the multiple battery packs in a one-to-one correspondence. The present invention also discloses a power supply method for a multi-battery power supply board for lamps. The present invention avoids the situation that all battery packs are always in a working state, and also avoids the situation that individual battery packs are in standby for a long time, thereby improving the reliability of the battery pack.

Description

Technical Field

[0001] The present invention relates to power management of a lamp with its own power supply, and more particularly to a multi-battery powered power board for the lamp and a power supply method thereof. Background Art

[0002] Solar lamps are powered by crystalline silicon solar panels and store electricity through battery packs. Commonly used battery packs include lithium battery packs and traditional batteries. And solar lamps generally use ultra-bright LED light-emitting modules as light sources. Because solar lamps are easy to install, they are widely used for lighting in places such as roads and courtyards. Due to different locations and different lengths of sunshine in different seasons, most of the current solar lamps are equipped with multiple battery packs to meet the lighting needs of lamps in different locations and seasons. However, the traditional management method for battery packs is to directly connect multiple battery packs and charge and discharge them uniformly. This management method keeps all battery packs in working condition, which is prone to fatigue attenuation, resulting in a reduction in battery life. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies in the prior art. The first purpose is to provide a multi-battery power supply board for lamps, which solves the problem of fatigue attenuation caused by the battery pack being in a working state all the time.

[0004] The second purpose is to provide a multi-battery power supply board power supply method for lamps, which solves the problem of fatigue attenuation caused by the battery pack being in a working state all the time.

[0005] To achieve the above-mentioned purpose one, the present invention provides a multi-battery power supply board for lamps, including an MCU module, a power management module and a driving module; the power management module includes a solar panel control unit, and the power management module also includes multiple battery control units; the control ends of the multiple battery control units are connected one-to-one with the multiple control pins of the MCU module, the input ends of the multiple battery control units are connected one-to-one with the positive output ends of the multiple battery packs, the output ends of the multiple battery control units are connected in parallel with the output ends of the solar panel control unit, and the connection end of the battery control unit and the solar panel control unit is connected to the power input end of the driving module; the multiple signal acquisition pins of the MCU module are all connected with the signal acquisition unit, and the multiple signal acquisition units are respectively connected one-to-one with the solar panel and the positive output ends of the multiple battery packs.

[0006] As a further improvement, the power management module also includes a discharge protection unit; the control end of the discharge protection unit is connected to the MCU module, the input end of the discharge protection unit is connected to the connection end of the battery control unit and the solar panel control unit, and the output end of the discharge protection unit is grounded.

[0007] Furthermore, the discharge protection unit includes a resistor R54, a resistor R55, a resistor R56, a voltage regulator diode ZD7 and a transistor Q20; the PA10 pin of the MCU module is connected to the base of the transistor Q20 through the resistor R56, the emitter of the transistor Q20 is grounded, the collector of the transistor Q20 is connected to the connecting end of the battery control unit and the solar panel control unit through the resistor R55 and the resistor R54 connected in series, the cathode of the voltage regulator diode ZD7 is connected to the connecting end of the battery control unit and the solar panel control unit, the anode of the voltage regulator diode ZD7 is connected to the connecting end of the resistor R54 and the resistor R55, and the cathode of the voltage regulator diode ZD7 is also connected to a control end of the solar panel control unit.

[0008] Furthermore, the solar panel control unit includes a resistor 51, a resistor 52, a resistor 53, a voltage-stabilizing diode ZD6, a transistor Q9, a field effect transistor Q10 and a field effect transistor Q11; the PA12 pin of the MCU module is connected to the base of the transistor Q9 through a resistor R53, the emitter of the transistor Q9 is grounded, the collector of the transistor Q9 is connected to the positive output end of the solar panel through a resistor R52 and a resistor R51 connected in series, the cathode of the voltage-stabilizing diode ZD6 is connected to the positive output end of the solar panel The positive output end is connected, the anode of the voltage-stabilizing diode ZD6 is connected to the connection end of the resistor R51 and the resistor R52, and the connection end of the resistor R51 and the resistor R52 is connected to the gate of the field effect tube Q10, the source of the field effect tube Q10 is connected to the positive output end of the solar power generation panel, the drain of the field effect tube Q10 is connected to the drain of the field effect tube Q11, the source of the field effect tube Q11 is connected to the output end of the battery control unit, and the gate of the field effect tube Q11 is connected to the anode of the voltage-stabilizing diode ZD7.

[0009] Furthermore, the battery control unit includes a transistor Qi, a field effect transistor Qk, a field effect transistor Qk+1, a resistor Rj, a resistor Rj+1, a resistor Rj+2 and a voltage regulator diode ZDm; one of the input and output pins of the MCU module is connected to the base of the transistor Qi through the resistor Rj+2, the emitter of the transistor Qi is grounded, the collector of the transistor Qi is connected to the source of the field effect transistor Qk through the resistor Rj+1 and the resistor Rj connected in series, and the source of the field effect transistor Qk is connected to the emitter of the field effect transistor Qk+1. The cathode of the voltage-stabilizing diode ZDm is connected to the connection end of the resistor Rj and the source of the field effect transistor Qk, the anode of the voltage-stabilizing diode ZDm is connected to the connection end of the resistor Rj and the resistor Rj+1, and the connection end of the resistor Rj and the resistor Rj+1 is connected to the gate of the field effect transistor Qk, and the gate of the field effect transistor Qk is connected to the gate of the field effect transistor Qk+1; the drain of the field effect transistor Qk is connected to the positive output end of the nth battery pack, and the drain of the field effect transistor Qk+1 is connected to the output end of the battery control unit;

[0010] Among them, i, j, k, n, and m are all natural numbers.

[0011] To achieve the above-mentioned second purpose, the present invention provides a multi-battery power panel power supply method for lamps, which detects the output voltage of the solar panel in real time. When the output voltage of the solar panel is higher than the set light-on voltage threshold, the battery voltage of all battery packs is obtained in real time, and the battery packs are charged in an orderly manner from small to large according to the battery voltage of the battery pack; when the output voltage of the solar panel is lower than the set light-on voltage threshold, the battery voltage of all battery packs is obtained in real time, and the battery packs are discharged in an orderly manner from large to small according to the battery voltage of the battery pack to light the lamp.

[0012] As a further improvement, the battery pack is charged in an orderly manner from small to large according to the battery voltage of the battery pack, specifically including:

[0013] After obtaining the battery voltages of all the battery groups, first compare all the battery voltages, and sort the battery groups from small to large according to the battery voltages, then charge the battery group with the smallest battery voltage first, and charge the battery group with the smallest battery voltage until its battery voltage reaches the set overcharge protection threshold; then charge the remaining battery groups in turn according to the sorting of the battery groups, and charge the battery group currently being charged until its battery voltage reaches the set overcharge protection threshold before charging the next battery group.

[0014] Furthermore, the discharging of the battery pack in an orderly manner from large to small according to the battery voltage of the battery pack specifically includes:

[0015] After obtaining the battery voltages of all the battery groups, all the battery voltages are first compared, and the battery groups are sorted from large to small according to the battery voltages of the battery groups, and then the battery group with the largest battery voltage is discharged first to power the light-emitting module, and when the battery group with the largest battery voltage is discharged until its battery voltage reaches a set over-discharge protection threshold, the discharge of the battery group is stopped; then, according to the sorting of the battery groups, the remaining battery groups are discharged in turn, and the battery group currently being discharged is discharged until its battery voltage reaches the set over-discharge protection threshold before the next battery group is discharged.

[0016] Furthermore, when it is obtained that the battery voltages of more than two battery groups are the same, the battery groups with the same battery voltage are randomly sorted, and the battery groups with the same battery voltage are sorted adjacent to each other in sequence.

[0017] Beneficial Effects

[0018] The advantages of the present invention are as follows: by independently charging and discharging all battery packs, the internal power supply of the solar lamp can be better managed, which not only effectively guarantees the power in each battery pack, but also can fully use multiple battery packs; while avoiding all battery packs being in a working state all the time, it also avoids individual battery packs being in a standby state for a long time, thereby improving the reliability of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a block diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the circuit structure of the power management module of the present invention;

[0021] Figure 3 It is a schematic diagram of the circuit structure of the MCU module of the present invention.

[0022] Figure 4 The figure is a schematic diagram of the circuit structure of the signal collection unit connected to the solar power generation panel of the present invention.

[0023] Figure 5 It is a schematic diagram of the circuit structure of the signal acquisition unit connected to the first battery pack of the present invention.

[0024] Figure 6 It is a schematic diagram of the circuit structure of the driving module of the present invention.

[0025] Figure 7 It is a schematic diagram of the circuit structure of the power supply module of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0027] See also Figure 1 The present invention provides a multi-battery power board for a lamp, comprising an MCU module, a power management module and a drive module. Figure 3 As shown, the MCU module is a single-chip microcomputer, which is used to detect the output voltage of the solar panel and the battery voltage of all battery packs. In this embodiment, there are four battery packs, which are arranged in sequence as the first battery pack, the second battery pack, the third battery pack and the fourth battery pack. The power management module includes a solar panel control unit and four battery control units. The control ends of the four battery control units are connected one-to-one with the four control pins of the MCU module, the input ends of the four battery control units are connected one-to-one with the forward output ends of the four battery packs, the output ends of the four battery control units are connected in parallel with the output end of the solar panel control unit, and the connection end of the battery control unit and the solar panel control unit is connected to the power input end of the drive module to power the drive module and the light-emitting module. Specifically, the circuit structure of the drive module is as follows Figure 6 As shown. The five signal acquisition pins of the MCU module are all connected to the signal acquisition unit, and the five signal acquisition units are respectively connected to the solar panels and the positive output ends of the four battery packs. Specifically, the circuit structure of the signal acquisition unit connected to the solar panel is as follows: Figure 4 The circuit structure of the signal acquisition unit connected to the first battery pack is as shown in Figure 5 As described above, the structures of all signal acquisition units connected to the battery pack are consistent. In addition, the power supply board also includes a power supply module, whose circuit structure is as follows Figure 7 The MCU module is connected to the power output end of the power supply module, and the input end of the power supply module is connected to the positive output end of the solar panel and the positive output ends of the four battery packs.

[0028] The power management module of this embodiment also includes a discharge protection unit. The control end of the discharge protection unit is connected to the MCU module, the input end of the discharge protection unit is connected to the connection end of the battery control unit and the solar panel control unit, and the output end of the discharge protection unit is grounded. The discharge protection unit is used to release the electric energy generated by the solar panel when the four battery packs are fully charged and the solar panel is still generating electricity.

[0029] See also Figure 2, the discharge protection unit includes a resistor R54, a resistor R55, a resistor R56, a voltage-stabilizing diode ZD7 and a transistor Q20; the PA10 pin of the MCU module is connected to the base of the transistor Q20 through the resistor R56, the emitter of the transistor Q20 is grounded, the collector of the transistor Q20 is connected to the connection end of the battery control unit and the solar panel control unit through the resistor R55 and the resistor R54 connected in series, the cathode of the voltage-stabilizing diode ZD7 is connected to the connection end of the battery control unit and the solar panel control unit, the anode of the voltage-stabilizing diode ZD7 is connected to the connection end of the resistor R54 and the resistor R55, and the cathode of the voltage-stabilizing diode ZD7 is also connected to the gate of the field effect tube Q11. When the four battery packs are all charged, the MCU module turns off the battery control units of the four battery packs. At this time, if the voltage of the solar panel is higher than the preset light-on voltage threshold, the PA10 pin of the MCU module sends a signal to turn on the transistor Q20 to release the electric energy generated by the solar panel. The value of the light-on voltage threshold is selected according to the design voltage of the battery pack. For example, when the design voltage of the battery pack is 12V, the light-on voltage threshold can be any voltage between 3-10V. The specific value of the light-on voltage threshold can be determined according to the illumination of the specific installation location.

[0030] The solar panel control unit includes a resistor 51, a resistor 52, a resistor 53, a voltage stabilizing diode ZD6, a transistor Q9, a field effect transistor Q10 and a field effect transistor Q11. The PA12 pin of the MCU module is connected to the base of the transistor Q9 through the resistor R53, the emitter of the transistor Q9 is grounded, the collector of the transistor Q9 is connected to the forward output end of the solar power generation panel through the resistors R51 and R52 connected in series, the cathode of the Zener diode ZD6 is connected to the forward output end of the solar power generation panel, the anode of the Zener diode ZD6 is connected to the connecting end of the resistor R51 and the resistor R52, and the connecting end of the resistor R51 and the resistor R52 is connected to the gate of the field effect transistor Q10, the source of the field effect transistor Q10 is connected to the forward output end of the solar power generation panel, the drain of the field effect transistor Q10 is connected to the drain of the field effect transistor Q11, the source of the field effect transistor Q11 is connected to the output end of the battery control unit, and the gate of the field effect transistor Q11 is connected to the anode of the Zener diode ZD7.

[0031] The circuit structures of the four battery control units of this embodiment are consistent. This embodiment only describes the circuit structure of the battery control unit connected to the first battery pack. Specifically, the battery control unit includes a transistor Q21, a field effect transistor Q12, a field effect transistor Q13, a resistor R57, a resistor R58, a resistor R59 and a voltage zener diode ZD8; the PA11 pin of the MCU module is connected to the base of the transistor Q21 through the resistor R59, the emitter of the transistor Q21 is grounded, the collector of the transistor Q21 is connected to the source of the field effect transistor Q12 through the resistor R58 and the resistor R57 connected in series, and the source of the field effect transistor Q12 is connected to the source of the field effect transistor Q13. The cathode of the voltage-stabilizing diode ZD8 is connected to the connection end of the resistor R57 and the source of the field effect tube Q12, the anode of the voltage-stabilizing diode ZD8 is connected to the connection end of the resistor R57 and the resistor R58, and the connection end of the resistor R57 and the resistor R58 is connected to the gate of the field effect tube Q12, and the gate of the field effect tube Q12 is connected to the gate of the field effect tube Q13; the drain of the field effect tube Q12 is connected to the positive output end of the first battery pack, and the drain of the field effect tube Q13 is connected to the output end of the battery control unit. When the PA11 pin of the MCU module sends a control signal, the transistor Q21 is turned on, thereby triggering the two field effect tubes to turn on the two field effect tubes. Since the two field effect tubes form a bidirectional conduction switch, the charging and discharging of the first battery pack is realized.

[0032] The working principle of the present invention is that the MCU module detects the output voltage of the solar power generation panel and the battery voltage of the battery pack in real time.

[0033] When the output voltage of the solar panel is higher than the set light-on voltage threshold, the MCU module first compares the battery voltages of the four battery groups, and sorts the battery groups from small to large according to the battery voltages of the four battery groups. For example, among the four battery groups, the voltage of the first battery group is the smallest, the voltage of the third battery group is the second largest, and the voltage of the fourth battery group is the largest. Then, the order of the four battery groups is the first battery group, the third battery group, the second battery group, and the fourth battery group. After the battery groups are sorted, the MCU module also stores and records the sorted battery groups. Then, the PA11 pin of the MCU module sends a control signal to turn on the battery control unit corresponding to the battery group with the smallest battery voltage, so as to charge the battery group. And during the charging process, the MCU module continuously monitors the battery voltage of the battery group. When the battery voltage of the battery group is consistent with the overcharge protection threshold, the charging of the battery group is stopped, and then the battery group with the voltage second only to the smallest voltage is charged, that is, the third battery group is charged. And after the battery voltage of the battery group reaches the set overcharge protection threshold, the next battery group, that is, the fourth battery group, is charged. Finally, the second battery pack is charged to realize orderly charging of the battery packs.

[0034] When the output voltage of the solar panel is lower than the set light-on voltage threshold, the MCU module turns off the solar panel control unit and sends a control signal to the drive unit to start the drive unit. Next, the MCU module compares the battery voltages of the four battery groups and sorts the battery groups from large to small according to the battery voltages of the four battery groups. For example, among the four battery groups, the voltage of the first battery group is the smallest, the voltage of the third battery group is the second largest, and the voltage of the fourth battery group is the largest. Then the order of these four battery groups is the fourth battery group, the second battery group, the third battery group, and the first battery group. After the battery groups are sorted, the MCU module also stores and records the sorted battery groups. Then the MCU module sends a control signal to the battery control unit of the battery group with the largest voltage, that is, the battery control unit of the fourth battery group, so that the battery control unit is turned on, and the fourth battery group discharges to the outside to power the drive module and the light-emitting module. When the battery voltage of the fourth battery group drops to the over-discharge protection threshold, the MCU module turns off the battery control unit of the battery group and starts the battery control unit of the second battery group at the same time, and the second battery group supplies power to the outside. When the battery voltage of the second battery pack drops to the over-discharge protection threshold, the next battery pack is started to discharge externally, so that the battery packs can supply power to the lamps in an orderly manner.

[0035] A multi-battery power supply panel power supply method for lamps detects the output voltage of a solar panel in real time. When the output voltage of the solar panel is higher than a set light-on voltage threshold, the battery voltages of all battery groups are obtained in real time, and the battery groups are charged in order from small to large according to the battery voltages of the battery groups. Specifically, after obtaining the battery voltages of all battery groups, all battery voltages are first compared, and the battery groups are sorted from small to large according to the battery voltages of the battery groups. Then, the battery group with the smallest battery voltage is charged first, and the battery group with the smallest battery voltage is charged until its battery voltage reaches the set overcharge protection threshold. Then, the remaining battery groups are charged in sequence according to the sorting of the battery groups, and the battery group currently being charged is charged until its battery voltage reaches the set overcharge protection threshold before the next battery group is charged. In this way, orderly charging of all battery groups is achieved, the power in each battery group can be guaranteed, and the phenomenon of long-term power shortage of individual battery groups is avoided, thereby improving the reliability of the lamp.

[0036] When the output voltage of the solar panel is lower than the set lighting voltage threshold, the battery voltages of all battery groups are obtained in real time, and the battery groups are discharged in order from large to small according to the battery voltages of the battery groups to light up the light-emitting module. Specifically, after obtaining the battery voltages of all battery groups, all battery voltages are first compared, and the battery groups are sorted from large to small according to the battery voltages of the battery groups, and then the battery group with the largest battery voltage is discharged first to power the light-emitting module, and the discharge of the battery group is stopped when the battery voltage of the battery group with the largest battery voltage is discharged until its battery voltage reaches the set over-discharge protection threshold. Then, according to the sorting of the battery groups, the remaining battery groups are discharged in turn, and the battery group currently being discharged is discharged until its battery voltage reaches the set over-discharge protection threshold before the next battery group is discharged. In this way, the orderly discharge of the battery groups is achieved, which can ensure that the power in each battery group is fully utilized.

[0037] Preferably, when the battery voltages of more than two battery groups are obtained to be the same, the battery groups with the same battery voltage are randomly sorted, and these battery groups are sorted adjacent to each other in sequence. When the battery group is charging or discharging, the voltages of all the battery groups may be the same. In this case, the MCU module still charges and discharges the battery group according to the principle of sorting first and then charging or discharging one by one. For some places where the power consumption of lamps is low, for example, for lamps with four batteries, the fixed order of the four battery groups is the first battery group, the second battery group, the third battery group and the fourth battery group. During the lighting time of the lamp, only the electric energy of the first and second battery groups is consumed; and during the charging time, the two discharged battery groups can be fully charged. In this case, if the battery group is discharged according to the fixed order of the battery group, that is, only the first battery group and the second battery group are discharged, and then charged. If only these two battery groups are used for a long time, the attenuation of these two battery groups will be greater than that of the other two battery groups. Therefore, in order to avoid this problem, the present invention realizes the charging of the battery group and the discharge of the battery group to the lamp by randomly charging and discharging the battery groups with the same voltage, which can well protect the battery group.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A multi-battery power supply board for lamps, comprising an MCU module, a power management module and a drive module; the power management module comprises a solar panel control unit, characterized in that: The power management module also includes a plurality of battery control units; the control ends of the plurality of battery control units are connected one-to-one with the plurality of control pins of the MCU module, the input ends of the plurality of battery control units are connected one-to-one with the positive output ends of the plurality of battery packs, the output ends of the plurality of battery control units are connected in parallel with the output end of the solar panel control unit, and the connection end of the battery control unit and the solar panel control unit is connected with the power input end of the driving module; the plurality of signal acquisition pins of the MCU module are all connected with the signal acquisition units, and the plurality of signal acquisition units are respectively connected one-to-one with the solar panel and the positive output ends of the plurality of battery packs; The power management module also includes a discharge protection unit; the control end of the discharge protection unit is connected to the MCU module, the input end of the discharge protection unit is connected to the connection end of the battery control unit and the solar panel control unit, and the output end of the discharge protection unit is grounded; The discharge protection unit includes a resistor R54, a resistor R55, a resistor R56, a voltage-stabilizing diode ZD7 and a transistor Q20; the PA10 pin of the MCU module is connected to the base of the transistor Q20 through the resistor R56, the emitter of the transistor Q20 is grounded, the collector of the transistor Q20 is connected to the connecting end of the battery control unit and the solar panel control unit through the resistor R55 and the resistor R54 connected in series, the cathode of the voltage-stabilizing diode ZD7 is connected to the connecting end of the battery control unit and the solar panel control unit, the anode of the voltage-stabilizing diode ZD7 is connected to the connecting end of the resistor R54 and the resistor R55, and the cathode of the voltage-stabilizing diode ZD7 is also connected to a control end of the solar panel control unit; The solar panel control unit includes resistors 51, 52, 53, a voltage stabilizing diode ZD6, a transistor Q9, a field effect transistor Q10, and a field effect transistor Q11; the PA12 pin of the MCU module is connected to the base of the transistor Q9 through a resistor R53, the emitter of the transistor Q9 is grounded, the collector of the transistor Q9 is connected to the positive output end of the solar panel through a resistor R52 and a resistor R51 connected in series, the cathode of the voltage stabilizing diode ZD6 is connected to the positive output end of the solar panel, and the cathode of the voltage stabilizing diode ZD6 is connected to the positive output end of the solar panel. The output end is connected, the anode of the voltage-stabilizing diode ZD6 is connected to the connection end of the resistor R51 and the resistor R52, and the connection end of the resistor R51 and the resistor R52 is connected to the gate of the field effect tube Q10, the source of the field effect tube Q10 is connected to the forward output end of the solar power generation panel, the drain of the field effect tube Q10 is connected to the drain of the field effect tube Q11, the source of the field effect tube Q11 is connected to the output end of the battery control unit, and the gate of the field effect tube Q11 is connected to the anode of the voltage-stabilizing diode ZD7.

2. A multi-battery power supply board for a lamp according to claim 1, characterized in that: The battery control unit includes a transistor Qi, a field effect transistor Qk, a field effect transistor Qk+1, a resistor Rj, a resistor Rj+1, a resistor Rj+2 and a voltage stabilizing diode ZDm; one of the input and output pins of the MCU module is connected to the base of the transistor Qi through the resistor Rj+2, the emitter of the transistor Qi is grounded, the collector of the transistor Qi is connected to the source of the field effect transistor Qk through the resistor Rj+1 and the resistor Rj connected in series, and the source of the field effect transistor Qk is connected to the source of the field effect transistor Qk+1. The cathode of the voltage-stabilizing diode ZDm is connected to the connection end of the resistor Rj and the source of the field effect transistor Qk, the anode of the voltage-stabilizing diode ZDm is connected to the connection end of the resistor Rj and the resistor Rj+1, and the connection end of the resistor Rj and the resistor Rj+1 is connected to the gate of the field effect transistor Qk, and the gate of the field effect transistor Qk is connected to the gate of the field effect transistor Qk+1; the drain of the field effect transistor Qk is connected to the positive output end of the nth battery pack, and the drain of the field effect transistor Qk+1 is connected to the output end of the battery control unit; Among them, i, j, k, n, and m are all natural numbers.

3. A power supply method using the multi-battery power supply board for lamps according to claim 1, characterized in that: The output voltage of the solar panel is detected in real time. When the output voltage of the solar panel is higher than the set light-on voltage threshold, the battery voltage of all battery packs is obtained in real time, and the battery packs are charged in an orderly manner from small to large according to the battery voltage of the battery pack; when the output voltage of the solar panel is lower than the set light-on voltage threshold, the battery voltage of all battery packs is obtained in real time, and the battery packs are discharged in an orderly manner from large to small according to the battery voltage of the battery pack to light up the light-emitting module.

4. The power supply method for a multi-battery power supply board for a lamp according to claim 3, characterized in that: The charging of the battery pack in an orderly manner from low to high according to the battery voltage of the battery pack specifically includes: After obtaining the battery voltages of all the battery groups, first compare all the battery voltages, and sort the battery groups from small to large according to the battery voltages, then charge the battery group with the smallest battery voltage first, and charge the battery group with the smallest battery voltage until its battery voltage reaches the set overcharge protection threshold; then charge the remaining battery groups in turn according to the sorting of the battery groups, and charge the battery group currently being charged until its battery voltage reaches the set overcharge protection threshold before charging the next battery group.

5. The power supply method for a multi-battery power supply board for a lamp according to claim 3, characterized in that: The method of discharging the battery pack in an orderly manner according to the battery voltage of the battery pack from large to small specifically includes: After obtaining the battery voltages of all the battery groups, all the battery voltages are first compared, and the battery groups are sorted from large to small according to the battery voltages of the battery groups, and then the battery group with the largest battery voltage is discharged first to power the light-emitting module, and when the battery group with the largest battery voltage is discharged until its battery voltage reaches a set over-discharge protection threshold, the discharge of the battery group is stopped; then, according to the sorting of the battery groups, the remaining battery groups are discharged in turn, and the battery group currently being discharged is discharged until its battery voltage reaches the set over-discharge protection threshold before the next battery group is discharged.

6. The power supply method for a multi-battery power supply board for a lamp according to claim 4 or 5, characterized in that: When it is obtained that the battery voltages of more than two battery groups are the same, the battery groups with the same battery voltages are randomly sorted, and the battery groups with the same battery voltages are sorted adjacent to each other in sequence.

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