A charging control system and a lamp

Abstract

The utility model provides a charging control system, including external power module, charging circuit and control module, charging circuit includes charging module, the setting quantity of charging module is matched with the quantity of battery unit, charging module is in the on state can connect the connection between corresponding battery unit and external power module, to make corresponding battery unit and charging power source establish loop, charging module is in the off state can cut off the connection between corresponding battery unit and external power module, to make corresponding battery unit and charging power source cut off loop, control module controls every charging module respectively, makes to multiple battery unit time -sharing charging. The utility model discloses a charging control system, through time -sharing charging mode to charge battery unit respectively, ultimately realizes to battery module charging, effectively solves the problem that the output voltage of charging power source can not satisfy battery module overall charging. The utility model also provides a kind of lamp.

Description

Technical Field

[0001] This utility model relates to the field of charging, and in particular to a charging control system and a lighting fixture. Background Technology

[0002] In the field of portable electronic devices, the 5V output voltage of the USB interface standard has become the universal charging standard. Traditional linear charging solutions can only directly charge single lithium batteries (nominal voltage 3.7V, full charge 4.2V) (such as dedicated chips like the TP4056). When applied to high-power LED lighting equipment, a single lithium battery needs to provide more than 10W of power, which will cause the discharge current to exceed 3A, leading to three major technical bottlenecks:

[0003] 1. Efficiency loss: According to Joule's law P=I²R, large currents significantly increase the resistance loss of PCB traces.

[0004] 2. Soaring costs: Low internal resistance battery cells, large cross-section copper foil, and high current protection components are required;

[0005] 3. Design complexity: High-current paths require special heat dissipation treatment, which restricts product miniaturization.

[0006] Current industry solutions often use two lithium batteries connected in series (total voltage 8.4V) to reduce operating current, but this faces new technical challenges:

[0007] 1. Voltage matching issue: If the voltage of the series-connected battery pack exceeds 5V input, traditional linear chargers cannot be used directly.

[0008] 2. Defects of switching charging: Although mainstream BOOST constant current solutions (such as CN3322) can achieve voltage conversion, their high-frequency switching characteristics lead to:

[0009] a) Electromagnetic interference (EMI) requires the addition of an LC filter network;

[0010] b) A power inductor and a freewheeling diode are required;

[0011] c) Overall BOM costs increased by more than 30%.

[0012] Especially in EMI-sensitive scenarios such as LED lighting, the radiated disturbances (30MHz-1GHz) generated by switching power supplies require complex shielding designs to meet the EN55015 standard, significantly increasing the R&D cycle. Utility Model Content

[0013] To overcome the shortcomings of existing technologies, this utility model provides a charging control system. The charging circuit is designed to charge individual battery cells separately using a time-sharing charging method when the output voltage of the charging power supply cannot directly meet the overall charging requirements of the battery module, thus ultimately charging the entire battery module. This utility model also provides a lighting fixture.

[0014] To achieve the above objectives, the present invention employs the following technical solution:

[0015] A charging control system for charging a battery module consisting of multiple battery cells connected in series, comprising:

[0016] An external power supply module, which is used to connect to a charging power supply to introduce electrical energy;

[0017] A charging circuit includes charging modules, the number of which matches the number of battery cells and is matched one-to-one; when a charging module is in a conducting state, it can connect the corresponding battery cell to an external power supply module to establish a circuit between the corresponding battery cell and the charging power supply; when a charging module is in a disconnected state, it can disconnect the corresponding battery cell from the external power supply module to cut off the circuit between the corresponding battery cell and the charging power supply.

[0018] The system also includes a control module, which is connected to multiple charging modules to control the on / off state of each charging module, thereby enabling time-sharing charging of the multiple battery cells.

[0019] Using the above technical solution, the control module can independently control each charging module. Therefore, the control module can selectively control one or more charging modules to be turned on within a time period, so that the corresponding charging unit can be charged. Within another time period, it can control another one or more charging modules to be turned on, so that the corresponding charging unit can be charged, thereby realizing time-sharing charging. Generally, the control module only controls one charging module to be turned on within a time period, that is, only one corresponding battery unit is charged within a time period. That is, the first battery unit is charged first, and when the first battery unit is fully charged, the second battery unit is charged, and so on, to realize the charging of the battery module.

[0020] The above technical solution can charge the battery module by charging the battery cells separately through time-sharing charging when the output voltage of the charging power supply cannot directly meet the overall charging requirements of the battery module.

[0021] Specifically, the battery unit can be a single battery cell or multiple batteries connected in series.

[0022] Furthermore, the external power supply module includes an external positive terminal for connecting to the positive output terminal of the charging power supply, and an external negative terminal for connecting to the negative output terminal of the charging power supply.

[0023] The charging module includes a first charging unit and a second charging unit. The first charging unit is disposed between the external positive terminal of the external power module and the positive terminal of the corresponding battery unit for connecting the external positive terminal of the external power module and the positive terminal of the corresponding battery unit. The second charging unit is disposed between the external negative terminal of the external power module and the negative terminal of the corresponding battery unit for connecting the external negative terminal of the external power module and the negative terminal of the corresponding battery unit.

[0024] The first charging unit includes a first controllable switch, a first switch terminal of the first controllable switch is connected to the external positive terminal of the external power module, a second switch terminal of the first controllable switch is connected to the positive terminal of the corresponding battery unit, and a control module is connected to the first control terminal of the first controllable switch to control the on / off state between the first switch terminal and the second switch terminal.

[0025] And / or the second charging unit includes a second controllable switch, the third switch terminal of the second controllable switch is connected to the external negative terminal of the external power supply module, the fourth switch terminal of the second controllable switch is connected to the negative terminal of the corresponding battery unit, and the control module is connected to the second control terminal of the second controllable switch to control the on / off state between the third switch terminal and the fourth switch terminal.

[0026] By adopting the above technical solution, the charging module becomes more reasonable. When the first charging unit is equipped with a first controllable switch, the control module can control the state of the first controllable switch to control the on / off state between the positive terminal of the battery unit and the external positive terminal of the external power module. When the second charging unit is equipped with a second controllable switch, the control module can control the state of the second controllable switch to control the on / off state between the negative terminal of the battery unit and the external negative terminal of the external power module.

[0027] Preferably, the first charging unit is provided with a first controllable switch, and the second charging unit is provided with a second controllable switch.

[0028] Furthermore, the first controllable switch adopts a first MOSFET, the first MOSFET adopts a P-MOSFET, the drain of the first MOSFET is formed as the first switching terminal and connected to the positive output terminal of the charging power supply, the source of the first MOSFET is formed as the second switching terminal and connected to the positive terminal of the corresponding battery cell, and the gate of the first MOSFET is formed as the first control terminal.

[0029] The second controllable switch uses a second MOSFET, which is an N-MOSFET. The source (S) of the second MOSFET is formed as the third switching terminal and connected to the negative output terminal of the charging power supply. The drain (D) of the second MOSFET is formed as the fourth switching terminal and connected to the negative terminal of the corresponding battery cell. The gate (G) of the second MOSFET is formed as the second control terminal.

[0030] By adopting the above technical solution, the first controllable switch and the second controllable switch are more reasonable. The use of the first MOSFET and the second MOSFET naturally has the advantage of preventing backflow, and their state switching is quieter than that of the relay. At the same time, it can also avoid the risk of contact sparking caused by the state switching of the relay.

[0031] Furthermore, the battery module includes a first battery unit and a second battery unit connected in series, and correspondingly, the charging module includes a first charging module corresponding to the first battery unit and a second charging module corresponding to the second battery unit.

[0032] The first charging unit in the first charging module is used to connect the external positive terminal of the external power supply module to the positive terminal of the first battery unit, and the second charging unit in the first charging module is used to connect the external negative terminal of the external power supply module to the negative terminal of the first battery unit; the first charging unit in the second charging module is used to connect the external positive terminal of the external power supply module to the positive terminal of the second battery unit, and the second charging unit in the second charging module is used to connect the external negative terminal of the external power supply module to the negative terminal of the second battery unit.

[0033] By adopting the above technical solution, the charging control system becomes more reasonable. When the first charging unit and the second charging unit in the first charging module are in a conducting state, the first battery unit is charged; when the first charging unit and the second charging unit in the second charging module are in a conducting state, the second battery unit is charged.

[0034] Furthermore, the charging control system includes an output control switch, which is connected in series between the battery cells, and / or in series on the positive terminal side of the battery module, and / or in series on the negative terminal side of the battery module, to control whether the battery module can output electrical energy.

[0035] By adopting the above technical solution, the charging control system becomes more reasonable; the setting of the output control switch can control whether the battery module outputs electrical energy; and it can avoid data detection errors during charging.

[0036] Specifically, when the output control switch is connected in series between the battery cells, it controls whether a series connection is established between the battery cells, thereby controlling whether the battery module can output electrical energy. When the output control switch is connected in series on the positive terminal side of the battery module, it controls whether the positive terminal of the battery module can be connected to the positive terminal of the load, thereby controlling whether the battery module can output electrical energy. When the output control switch is connected in series on the negative terminal side of the battery module, it controls whether the negative terminal of the battery module can be connected to the negative terminal of the load, thereby controlling whether the battery module can output electrical energy.

[0037] Preferably, the output control switch is connected in series on the negative terminal side of the battery module.

[0038] Furthermore, when the output control switch is connected in series on the positive side of the battery module, the first battery cell is referred to as the first battery cell, and the positive terminal of the first battery cell is formed as the positive terminal of the battery module. The positive terminal of the first battery cell is connected to an external load through the first controllable switch in the first charging unit corresponding to it. The first controllable switch corresponding to the positive terminal of the first battery cell is formed as the output control switch. For example, when the charging module includes the first charging unit and the second charging unit, and the first charging unit is the first battery cell and the second charging unit is the last battery cell, the first controllable switch of the first charging unit in the first charging module is formed as the output control switch.

[0039] When the output control switch is connected in series on the negative terminal side of the battery module, the last battery cell is referred to as the last battery cell. The negative terminal of the last battery cell becomes the negative terminal of the battery module. The negative terminal of the last battery cell is connected to an external load through the second controllable switch in the corresponding second charging unit. The second controllable switch corresponding to the negative terminal of the last battery cell becomes the output control switch. For example, if the charging module includes a first charging unit and a second charging unit, and the first charging unit is the first battery cell and the second charging unit is the last battery cell, the second controllable switch of the second charging unit in the second charging module becomes the output control switch.

[0040] By adopting the above technical solution, the charging control system becomes more reasonable and simpler.

[0041] Furthermore, the external power supply module includes an external positive terminal for connecting to the positive output terminal of the charging power supply and an external negative terminal for connecting to the negative output terminal of the charging power supply. The charging module is connected to the positive output terminal of the charging power supply by connecting to the external positive terminal, and the charging module is connected to the negative output terminal of the charging power supply by connecting to the external negative terminal.

[0042] The above technical solution makes the external power supply module more reasonable.

[0043] Furthermore, the charging control system includes a noise filtering module for filtering line noise, and the noise filtering module is connected to the external power supply module.

[0044] By adopting the above technical solution, the charging control system becomes more reasonable, and the noise filtering module ensures the charging effect.

[0045] Furthermore, the noise filtering module includes a first capacitor and a fifth capacitor, wherein the first capacitor and the second capacitor are connected in parallel to the external positive terminal and the external negative terminal;

[0046] Specifically, the fifth capacitor is an electrolytic capacitor.

[0047] The above technical solution makes the noise filtering module more reasonable.

[0048] Furthermore, the charging control system includes a first diode, the positive terminal of which is connected to the external positive terminal of the external power supply module, and the negative terminal of which is connected to the charging module.

[0049] By adopting the above technical solution, the charging control system becomes more reasonable. The first diode is used to share the heat generated by the charging circuit, while also preventing backflow.

[0050] Furthermore, a charging current-limiting resistor is connected in series between the external power supply module and the charging circuit to limit the charging current.

[0051] By adopting the above technical solution, the charging control system becomes more reasonable, and the setting of the charging current limiting resistor can limit the charging current, ensuring charging safety and charging effect.

[0052] Furthermore, the charging control system includes a first power source for providing electrical energy, and the control module is connected to the output terminal of the first power source to obtain electrical energy.

[0053] By adopting the above technical solution, the charging control system becomes more reasonable, and the first power source supplies power to the control module to ensure the operation of the control module.

[0054] Furthermore, the first power supply supplies power to the control module through a filtering module; specifically, the filtering module includes a third resistor and a fourth capacitor, one end of the third resistor is connected in series with one end of the fourth capacitor, the power supply terminal of the control module is connected to the connection point of the third resistor and the fourth capacitor, the other end of the third resistor is connected to the output terminal of the first power supply, and the other end of the fourth capacitor is grounded.

[0055] By adopting the above technical solution, the first power source provides energy to the control module in a more reasonable way, ensuring the stability and reliability of the supplied voltage.

[0056] Furthermore, the control module has a voltage detection terminal, and the number of voltage detection terminals is matched with the number of battery cells and corresponds one-to-one, so as to detect the voltage of each battery cell respectively. The control module controls the charging state according to the detected voltage.

[0057] By adopting the above technical solution, the charging control system becomes more reasonable. The control module can obtain the voltage of each battery cell, thereby determining whether the battery cell needs charging and whether the battery cell currently being charged has completed charging. Furthermore, the control module can obtain the voltage of the battery cell being charged in real time, so it can adjust the charging current according to the current voltage of the battery cell being charged to achieve segmented charging, thereby ensuring the charging effect. For example, trickle charging (1 / 10 of the preset current) is used when the voltage of the battery cell being charged is less than the first voltage value, and full current charging is used when the voltage of the battery cell being charged is greater than or equal to the first voltage value.

[0058] When the battery cell uses a single lithium battery (nominal voltage 3.7V, full charge 4.2V), the first voltage value is 2.5V.

[0059] Furthermore, the voltage detection terminal is directly connected to the positive terminal of the corresponding battery cell to detect the voltage of the battery cell;

[0060] Alternatively, the voltage detection terminal can detect the voltage of the corresponding battery cell through a voltage divider module. The voltage divider module includes a first resistor and a second resistor. One end of the first resistor and one end of the second resistor are connected in series. The voltage detection terminal is connected to the connection point of the first resistor and the second resistor. The other end of the first resistor is connected to the positive terminal of the corresponding battery cell, and the other end of the second resistor is grounded.

[0061] By adopting the above technical solution, the voltage detection terminal can detect the corresponding battery cell voltage more reasonably.

[0062] The voltage detection terminal can not only detect the actual voltage of the corresponding battery cell when it is charging, but also detect the voltage value of the corresponding point when multiple battery cells are connected in series and output to the outside.

[0063] Since the voltage detection terminal of the control module has a threshold requirement for the voltage it can withstand, if the voltage of the corresponding battery cell after it is fully charged is less than the voltage threshold that the voltage detection terminal can withstand, and the voltage at the corresponding point when multiple battery cells are connected in series and output to the outside is also less than the voltage threshold that the voltage detection terminal can withstand, the voltage detection terminal can be directly connected to the positive terminal of the corresponding battery cell, or the voltage of the corresponding battery cell can be detected through a voltage divider module.

[0064] If the voltage of the corresponding battery cell after it is fully charged is greater than the voltage threshold that the voltage detection terminal can withstand, or if the voltage at the corresponding point when multiple battery cells are connected in series and output to the outside is greater than the voltage threshold that the voltage detection terminal can withstand, the voltage detection terminal will detect the voltage of the corresponding battery cell through a voltage divider module to ensure that it can detect the voltage stably and reliably.

[0065] For example, the charging module includes a first charging unit and a second charging unit. The voltage detection terminal corresponding to the first charging unit can not only detect the voltage value of the first charging unit in real time when it is charging, but also detect the voltage value of the corresponding point when the first charging unit and the second charging unit are connected in series and output to the outside, that is, the overall voltage of the charging module; the voltage detection terminal corresponding to the second charging unit can detect the voltage value of the second charging unit in real time when it is charging.

[0066] The voltage detection terminal for detecting the first charging unit detects the voltage value of the first charging unit through the voltage divider module; the voltage detection terminal for detecting the second charging unit is directly connected to the positive terminal of the second charging unit to detect the voltage value of the second charging unit.

[0067] Furthermore, the control module has a current detection terminal, which is connected to the external power supply module to detect the charging current. The control module controls the charging state based on the detected charging current.

[0068] By adopting the above technical solution, the charging control system becomes more reasonable. Since the control module can acquire the charging current in real time, that is, provide charging current feedback, the control module can more accurately control the charging current.

[0069] Furthermore, the control module has a temperature detection terminal, and the charging control system includes a temperature detection module. The temperature detection module can detect the temperature during charging and output the detection result. The temperature detection terminal is connected to the temperature detection module to control the charging state according to the detection result of the temperature detection module.

[0070] By adopting the above technical solution, the charging control system becomes more reasonable, avoiding excessively high temperatures during charging. Specifically, when the real-time temperature obtained by the control module exceeds the threshold, the charging circuit is cut off to ensure charging safety.

[0071] Furthermore, the temperature detection module includes a fifth resistor and a thermistor. One end of the fifth resistor is connected in series with one end of the thermistor. The temperature detection terminal is connected to the connection point of the fifth resistor and the thermistor. The other end of the fifth resistor is connected to the output terminal of the first power supply, and the other end of the thermistor is grounded.

[0072] By adopting the above technical solution, since the thermistor is provided, the resistance of the thermistor will change when the temperature changes, which will cause the voltage value sent by the temperature detection module to the temperature detection terminal to change. That is, the voltage value input to the temperature detection terminal has a mapping relationship with the temperature, thereby indirectly enabling the control module to obtain temperature information.

[0073] Specifically, the thermistor is a negative temperature coefficient thermistor.

[0074] Furthermore, the control module has a timing setting terminal, and the charging control system includes a timing setting module for setting charging timing information. The timing setting terminal is connected to the timing setting module to obtain the charging timing information.

[0075] By adopting the above technical solution, the charging control system becomes more reasonable. The charging timing information can be set through the timing setting module, and the control module can control the charging status according to the charging timing information.

[0076] Furthermore, the timing setting terminal obtains charging timing information based on the voltage value it receives. For example, when the timing setting terminal inputs 0.1V, it corresponds to the end of charging in 1 hour; 0.15V corresponds to the end of charging in 1.5 hours; 0.2V corresponds to the end of charging in 2 hours; 0.25V corresponds to the end of charging in 2.5 hours, and so on.

[0077] The timing setting module includes a sixth resistor and a seventh resistor. One end of the sixth resistor is connected in series with one end of the seventh resistor. The timing setting terminal is connected to the connection point of the sixth resistor and the seventh resistor. The other end of the sixth resistor is connected to the output terminal of the first power supply, and the other end of the seventh resistor is grounded.

[0078] By adopting the above technical solution, the timing setting terminal and the timing setting module are made more reasonable; the ratio of the sixth resistor and the seventh resistor can set the voltage value input to the timing setting terminal, that is, changing the ratio of the sixth resistor and the seventh resistor can realize the control of the charging time; the sixth resistor and the seventh resistor can be fixed resistors, and the ratio of the sixth resistor and the seventh resistor can be set by the factory; of course, the sixth resistor or the seventh resistor can be a variable resistor, and the ratio of the sixth resistor and the seventh resistor can be set by the user.

[0079] Furthermore, the charging control system includes a charging indicator module for indicating the charging status. The charging indicator module includes a charging indicator light and a full charge indicator light. The positive terminals of the charging indicator light and the full charge indicator light are connected to the output terminal of the first power supply. The negative terminal of the charging indicator light is connected to the charging indicator light control terminal of the control module. The negative terminal of the full charge indicator light is connected to the full charge indicator light control terminal of the control module. When the charging stage is in progress, the control module controls the charging indicator light to operate. When the charging stage is in progress, the control module controls the full charge indicator light to operate.

[0080] By adopting the above technical solution, the charging control system allows users to understand the charging status by observing the charging indicator module. That is, when the charging indicator light is on, it indicates that the system is in the charging stage, and when the fully charged indicator light is on, it indicates that the system is in the fully charged stage.

[0081] Specifically, the charging indicator light is configured to emit red light when in operation, and the fully charged indicator light is configured to emit green light when in operation.

[0082] Furthermore, the charging indicator module includes an indicator current-limiting resistor for limiting the current flowing through the charging indicator and the full charge indicator, and the output terminal of the first power supply is connected to the positive terminal of the charging indicator and the full charge indicator through the indicator current-limiting resistor.

[0083] By adopting the above technical solution, the charging indicator module becomes more reasonable; the setting of the current limiting resistor can limit the current flowing through the charging indicator and the full charge indicator, ensuring that they can work stably and reliably.

[0084] Furthermore, the first power supply is an LDO module, the input terminal of the LDO module is connected to the external positive terminal of the external power supply module and the positive terminal of the battery module respectively, the ground terminal of the LDO module is grounded, and the output terminal of the LDO module is formed as the output terminal of the first power supply.

[0085] By adopting the above technical solution, the first power supply is made more reasonable and can realize adaptive power supply, that is, realize the automatic switching between the power supply of the charging power supply and the power supply of the battery module, and provide a high-precision and low-power power supply system; specifically, the LDO module adopts a low-power and high-precision LDO chip.

[0086] Furthermore, the positive terminal of the external power supply module is connected to the input terminal of the LDO module through a second diode, and the positive terminal of the battery module is connected to the input terminal of the LDO module through a third diode.

[0087] Specifically, the positive terminal of the external power supply module is connected to the positive terminal of the second diode, and the negative terminal of the second diode is connected to the input terminal of the LDO module; the positive terminal of the battery module is connected to the positive terminal of the third diode, and the negative terminal of the third diode is connected to the input terminal of the LDO module.

[0088] By adopting the above technical solution, the first power supply is more reasonable, and the arrangement of the second diode and the third diode can achieve isolation between the charging power supply and the battery module.

[0089] Furthermore, a second capacitor is connected in parallel between the input terminal of the LDO module and the ground terminal of the LDO module, and a third capacitor is connected in parallel between the output terminal of the LDO module and the ground terminal of the LDO module.

[0090] By adopting the above technical solution, the first power supply becomes more reasonable, and the setting of the second capacitor and the third capacitor can be used for noise filtering.

[0091] Furthermore, when the first controllable switch is provided, the control module has a first controllable switch control terminal, and the number of the first controllable switch control terminals is matched with the number of the first controllable switches and they are matched one-to-one.

[0092] When the second controllable switch is provided, the control module has a second controllable switch control terminal, and the number of the second controllable switch control terminals is matched with the number of the second controllable switches and they are matched one by one.

[0093] The first controllable switch control terminal outputs a PWM signal to turn on the first controllable switch, and / or the second controllable switch control terminal outputs a PWM signal to turn on the second controllable switch.

[0094] By adopting the above technical solution, the control module becomes more reasonable; the charging current can be adjusted by outputting a PWM signal to turn on the first or second controllable switch. Specifically, the charging current can be adjusted by adjusting the duty cycle of the PWM signal.

[0095] Furthermore, the external power supply module is a USB interface, the charging power supply is a USB charger, and the control module is an MCU or a system composed of logic electronic components.

[0096] By adopting the above technical solution, the charging control system becomes more reasonable. Specifically, the USB charger is a 5V USB charger, and the battery module is composed of two lithium batteries connected in series, with an output voltage of 8.4V.

[0097] A lighting fixture includes the aforementioned charging control system, a lighting module for illumination, and a battery module for power supply. The battery module comprises multiple battery cells connected in series. The charging control system is connected to the battery module to charge it. The battery module is connected to the lighting module to supply power to it. The control module of the charging control system is connected to the lighting module to control its operating state.

[0098] The above technical solution makes the lamp more reasonable. Specifically, the control module has a lighting control terminal, which is connected to the lighting module to achieve controller operation. The lighting control terminal achieves dimming by adjusting the duty cycle of its output PWM signal. More specifically, in order to extend the battery module discharge time, when the battery module voltage is greater than the second voltage value, the PWM output duty cycle is 100%. Afterward, for each voltage step decrease in the battery module voltage, the PWM duty cycle decreases linearly by 10%. When the battery module voltage is less than the third voltage value, the PWM duty cycle remains unchanged at 10%. When the battery module voltage is less than the third voltage value, the power is turned off. The battery module consists of two lithium batteries connected in series, with the second voltage value being 7.2V, the voltage step value being 0.1V, the third voltage value being 6.3V, and the fourth voltage value being 5.8V.

[0099] Compared with the prior art, the present invention has the following beneficial effects:

[0100] (1) The charging control system and lamp of this utility model are designed such that when the output voltage of the charging power supply cannot directly meet the overall charging requirements of the battery module, the battery units are charged separately through time-sharing charging, and the battery module is finally charged. This enables the charging of multiple series-connected lithium batteries (8.4V) by 5V standard USB input, breaking through the voltage limitation of traditional linear charging chips that only support single battery (4.2V), and adapting to multi-battery application scenarios without the need for a boost circuit.

[0101] (2) The charging control system of this utility model completely eliminates the inherent high-frequency EMI problem of switching power supply through the charging architecture of MOSFET time-sharing, simplifies PCB layout design, reduces electromagnetic compatibility test cost, and is particularly suitable for noise-sensitive lighting equipment.

[0102] (3) The charging control system and lamp of this utility model are reasonably designed. Compared with the BOOST boost scheme, it saves expensive components such as inductors and high-frequency capacitors, and reduces material costs by about 40%. Attached Figure Description

[0103] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0104] Figure 1 This is a schematic diagram of the charging control system of this utility model;

[0105] Figure 2This is a schematic diagram of the charging circuit in the charging control system of this utility model;

[0106] Figure 3 This is a schematic diagram of the control module in the charging control system of this utility model;

[0107] Figure 4 This is a schematic diagram of the structure of the first power source in the charging control system of this utility model;

[0108] The component names corresponding to the various reference numerals in the figure are as follows: 1. External power supply module; 101. External positive terminal; 102. External negative terminal; 2. Charging single channel; 201. Charging module; 2011. First charging unit; 2011-1. First controllable switch; 2011-11. First switch terminal; 2011-12. Second switch terminal; 2011-13. First control terminal; 2011-2. First MOSFET; 2012. Second charging unit; 20 12-1, Second controllable switch; 2012-11, Third switch terminal; 2012-12, Fourth switch terminal; 2012-13, Second control terminal; 2012-2, Second MOSFET; 201a, First charging module; 201b, Second charging module; 3, Control module; 301, Power supply terminal; 302, Voltage detection terminal; 303, Current detection terminal; 304, Temperature detection terminal; 305, Timer setting terminal; 306, Charging indicator light control. 307. Full charge indicator control terminal; 308. First controllable switch control terminal; 309. Second controllable switch control terminal; 3010. Light control terminal; 4. Output control switch; 5. Noise filtering module; 501. First capacitor; 502. Fifth capacitor; 6. First diode; 7. Charging current limiting resistor; 8. First power supply; 801. LDO module; 9. Filtering module; 901. Third resistor; 902. Fourth capacitor; 10. Voltage divider module; 1001. First resistor; 1002. Second resistor; 11. Temperature detection module; 1101. Fifth resistor; 1102. Thermistor; 12. Timer setting module; 1201. Sixth resistor; 1202. Seventh resistor; 13. Charging indicator module; 1301. Charging indicator; 1302. Full charge indicator; 1303. Indicator current limiting resistor; 14. Second diode; 15. Third diode; 16. Second capacitor; 17. Third capacitor;

[0109] 100, Battery module; 100-1, Battery unit; 100-1a, First battery unit; 100-1b, First battery unit; 100-1c, First battery unit; 100-1d, Last battery unit; 200, Charging power supply. Detailed Implementation

[0110] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0111] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0112] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0113] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0114] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0115] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0116] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0117] See Figures 1 to 2 This utility model provides a charging control system for charging a battery module 100 composed of multiple battery cells 100-1 connected in series, including:

[0118] An external power supply module 1 is used to connect to a charging power supply 200 to introduce electrical energy;

[0119] The charging circuit includes a charging module 201, the number of which matches the number of battery cells 100-1 and is matched one-to-one; when the charging module 201 is in the conducting state, it can connect the corresponding battery cell 100-1 to the external power module 1, so as to establish a circuit between the corresponding battery cell 100-1 and the charging power supply 200; when the charging module 201 is in the disconnected state, it can disconnect the corresponding battery cell 100-1 from the external power module 1, so as to disconnect the circuit between the corresponding battery cell 100-1 and the charging power supply 200.

[0120] And a control module 3, which is connected to multiple charging modules 201 respectively to control the on / off state of each charging module 201, so as to charge multiple battery cells 100-1 in a time-sharing manner.

[0121] Using the above technical solution, the control module 3 can independently control each charging module 201. Therefore, the control module 3 can selectively control one or more charging modules 201 to be turned on within a time period, so that the corresponding charging unit can be charged. Within another time period, it can control another one or more charging modules 201 to be turned on, so that the corresponding charging unit can be charged, thereby realizing time-sharing charging. Generally, the control module 3 only controls one charging module 201 to be turned on within a time period, that is, only one corresponding battery unit 100-1 is charged within a time period. That is, the first battery unit 100-1 is charged first, and when the first battery unit 100-1 is fully charged, the second battery unit 100-1 is charged, and so on, to realize the charging of the battery module 100.

[0122] The above technical solution can charge the battery module 100 by charging the battery cells 100-1 separately through time-sharing charging when the output voltage of the charging power supply 200 cannot directly meet the overall charging requirements of the battery module 100.

[0123] Specifically, the battery unit 100-1 can be a single battery or multiple batteries connected in series.

[0124] Furthermore, the external power supply module 1 includes an external positive terminal 101 for connecting to the positive output terminal of the charging power supply 200, and an external negative terminal 102 for connecting to the negative output terminal of the charging power supply 200.

[0125] The charging module 201 includes a first charging unit 2011 and a second charging unit 2012. The first charging unit 2011 is disposed between the external positive terminal 101 of the external power module 1 and the positive terminal of the corresponding battery unit 100-1 for connecting the external positive terminal 101 of the external power module 1 and the positive terminal of the corresponding battery unit 100-1. The second charging unit 2012 is disposed between the external negative terminal 102 of the external power module 1 and the negative terminal of the corresponding battery unit 100-1 for connecting the external negative terminal 102 of the external power module 1 and the negative terminal of the corresponding battery unit 100-1.

[0126] The first charging unit 2011 includes a first controllable switch 2011-1, the first switch terminal 2011-11 of the first controllable switch 2011-1 is connected to the external positive terminal 101 of the external power module 1, the second switch terminal 2011-12 of the first controllable switch 2011-1 is connected to the positive terminal of the corresponding battery unit 100-1, and the control module 3 is connected to the first control terminal 2011-13 of the first controllable switch 2011-1 to control the on / off state between the first switch terminal 2011-11 and the second switch terminal 2011-12;

[0127] And / or the second charging unit 2012 includes a second controllable switch 2012-1, the third switch terminal 2012-11 of the second controllable switch 2012-1 is connected to the external negative terminal 102 of the external power module 1, the fourth switch terminal 2012-12 of the second controllable switch 2012-1 is connected to the negative terminal of the corresponding battery unit 100-1, and the control module 3 is connected to the second control terminal 2012-13 of the second controllable switch 2012-1 to control the on / off state between the third switch terminal 2012-11 and the fourth switch terminal 2012-12.

[0128] By adopting the above technical solution, the charging module 201 becomes more reasonable. When the first charging unit 2011 is provided with a first controllable switch 2011-1, the control module 3 can control the on / off state between the positive terminal of the battery unit 100-1 and the external positive terminal 101 of the external power module 1 by controlling the state of the first controllable switch 2011-1. When the second charging unit 2012 is provided with a second controllable switch 2012-1, the control module 3 can control the on / off state between the negative terminal of the battery unit 100-1 and the external negative terminal 102 of the external power module 1 by controlling the state of the second controllable switch 2012-1.

[0129] Preferably, the first charging unit 2011 is provided with a first controllable switch 2011-1, and the second charging unit 2012 is provided with a second controllable switch 2012-1.

[0130] Furthermore, the first controllable switch 2011-1 adopts a first MOSFET 2011-2, the first MOSFET 2011-2 adopts a P-MOSFET, the drain (D) of the first MOSFET 2011-2 is formed as the first switch terminal 2011-11 and connected to the positive output terminal of the charging power supply 200, the source (S) of the first MOSFET 2011-2 is formed as the second switch terminal 2011-12 and connected to the positive terminal of the corresponding battery cell 100-1, and the gate (G) of the first MOSFET 2011-2 is formed as the first control terminal 2011-13;

[0131] The second controllable switch 2012-1 adopts a second MOSFET 2012-2, which is an N-MOSFET. The source (S) terminal of the second MOSFET 2012-2 is formed as the third switch terminal 2012-11 and connected to the negative output terminal of the charging power supply 200. The drain (D) terminal of the second MOSFET 2012-2 is formed as the fourth switch terminal 2012-12 and connected to the negative terminal of the corresponding battery cell 100-1. The gate (G) terminal of the second MOSFET 2012-2 is formed as the second control terminal 2012-13.

[0132] By adopting the above technical solution, the first controllable switch 2011-1 and the second controllable switch 2012-1 are more reasonable. The use of the first MOSFET 2011-2 and the second MOSFET 2012-2 naturally has the advantage of preventing backflow, and their state switching is quieter than that of the relay. At the same time, it can also avoid the risk of contact sparking caused by the state switching of the relay.

[0133] Furthermore, the battery module 100 includes a first battery unit 100-1b and a second battery unit 100-1 connected in series. Correspondingly, the charging module 201 includes a first charging module 201a corresponding to the first battery unit 100-1b and a second charging module 201b corresponding to the second battery unit 100-1.

[0134] The first charging unit 2011 in the first charging module 201a is used to connect the external positive terminal 101 of the external power module 1 to the positive terminal of the first battery unit 100-1b, and the second charging unit 2012 in the first charging module 201a is used to connect the external negative terminal 102 of the external power module 1 to the negative terminal of the first battery unit 100-1b; the first charging unit 2011 in the second charging module 201b is used to connect the external positive terminal 101 of the external power module 1 to the positive terminal of the second battery unit 100-1, and the second charging unit 2012 in the second charging module 201b is used to connect the external negative terminal 102 of the external power module 1 to the negative terminal of the second battery unit 100-1.

[0135] By adopting the above technical solution, the charging control system becomes more reasonable. When the first charging unit 2011 and the second charging unit 2012 in the first charging module 201a are in a conducting state, the first battery unit 100-1b is charged; when the first charging unit 2011 and the second charging unit 2012 in the second charging module 201b are in a conducting state, the second battery unit 100-1 is charged.

[0136] Furthermore, the charging control system includes an output control switch 4, which is connected in series between the battery cells 100-1 and the battery cells 100-1, and / or in series on the positive terminal side of the battery module 100, and / or in series on the negative terminal side of the battery module 100, to control whether the battery module 100 can output electrical energy.

[0137] The above technical solution makes the charging control system more reasonable; the output control switch 4 can control whether the battery module 100 outputs power; and can avoid data detection errors during charging.

[0138] Specifically, when the output control switch 4 is connected in series between the battery cells 100-1 and 100-1, the output control switch 4 can control whether a series connection is established between the battery cells 100-1 and 100-1, thereby controlling whether the battery module 100 can output electrical energy; when the output control switch 4 is connected in series on the positive terminal side of the battery module 100, the output control switch 4 can control whether the positive terminal of the battery module 100 can be connected to the positive terminal of the load, thereby controlling whether the battery module 100 can output electrical energy; when the output control switch 4 is connected in series on the negative terminal side of the battery module 100, the output control switch 4 can control whether the negative terminal of the battery module 100 can be connected to the negative terminal of the load, thereby controlling whether the battery module 100 can output electrical energy.

[0139] Preferably, the output control switch 4 is connected in series on the negative terminal side of the battery module 100.

[0140] Furthermore, when the output control switch 4 is connected in series on the positive side of the battery module 100, the first battery unit 100-1 is referred to as the first battery unit 100-1c. The positive terminal of the first battery unit 100-1c is formed as the positive terminal of the battery module 100. The positive terminal of the first battery unit 100-1c is connected to an external load through the first controllable switch 2011-1 in the first charging unit 2011 corresponding to it. The first controllable switch 2011-1 corresponding to the positive terminal of the first battery unit 100-1c is formed as the output control switch 4. For example, when the charging module 201 includes the first charging unit 2011 and the second charging unit 2012, and the first charging unit 2011 is the first battery unit 100-1c and the second charging unit 2012 is the last battery unit 100-1d, the first controllable switch 2011-1 of the first charging unit 2011 in the first charging module 201a is formed as the output control switch 4.

[0141] When the output control switch 4 is connected in series on the negative terminal side of the battery module 100, the last battery unit 100-1 is referred to as the last battery unit 100-1d. The negative terminal of the last battery unit 100-1d is formed as the negative terminal of the battery module 100. The negative terminal of the last battery unit 100-1d is connected to an external load through the second controllable switch 2012-1 in the corresponding second charging unit 2012. The second controllable switch 2012-1 corresponding to the negative terminal of the last battery unit 100-1d is formed as the output control switch 4. For example, if the charging module 201 includes the first charging unit 2011 and the second charging unit 2012, and the first charging unit 2011 is the first battery unit 100-1c and the second charging unit 2012 is the last battery unit 100-1d, the second controllable switch 2012-1 of the second charging unit 2012 in the second charging module 201b is formed as the output control switch 4.

[0142] By adopting the above technical solution, the charging control system becomes more reasonable and simpler.

[0143] Furthermore, the external power supply module 1 includes an external positive terminal 101 for connecting to the positive output terminal of the charging power supply 200, and an external negative terminal 102 for connecting to the negative output terminal of the charging power supply 200. The charging module 201 is connected to the positive output terminal of the charging power supply 200 by connecting to the external positive terminal 101, and the charging module 201 is connected to the negative output terminal of the charging power supply 200 by connecting to the external negative terminal 102.

[0144] The above technical solution makes the external power supply module 1 more reasonable.

[0145] Furthermore, the charging control system includes a noise filtering module 5 for filtering line noise, and the noise filtering module 5 is connected to the external power supply module 1.

[0146] By adopting the above technical solution, the charging control system becomes more reasonable, and the setting of the noise filtering module 5 can ensure the charging effect.

[0147] Furthermore, the noise filtering module 5 includes a first capacitor 501 and a fifth capacitor 502, wherein the first capacitor 501 and the second capacitor 16 are connected in parallel to the external positive terminal 101 and the external negative terminal 102.

[0148] Specifically, the fifth capacitor 502 is an electrolytic capacitor.

[0149] By adopting the above technical solution, the noise filtering module 5 becomes more reasonable.

[0150] Furthermore, the charging control system includes a first diode 6, the positive terminal of the first diode 6 is connected to the external positive terminal 101 of the external power supply module 1, and the negative terminal of the first diode 6 is connected to the charging module 201.

[0151] The above technical solution makes the charging control system more reasonable. The first diode 6 is used to share the heat generated by the charging circuit and also serves to prevent backflow.

[0152] Furthermore, a charging current-limiting resistor 7 is connected in series between the external power supply module 1 and the charging circuit to limit the charging current.

[0153] By adopting the above technical solution, the charging control system becomes more reasonable, and the setting of the charging current limiting resistor 7 can limit the charging current, ensuring charging safety and charging effect.

[0154] Furthermore, the charging control system includes a first power source 8 for providing electrical energy, and the control module 3 is connected to the output terminal of the first power source 8 to obtain electrical energy.

[0155] By adopting the above technical solution, the charging control system becomes more reasonable. The first power source 8 supplies power to the control module 3 to ensure that the control module 3 works.

[0156] Furthermore, the first power supply 8 supplies power to the control module 3 through the filter module 9; specifically, the filter module 9 includes a third resistor 901 and a fourth capacitor 902, one end of the third resistor 901 is connected in series with one end of the fourth capacitor 902, the power supply terminal 301 of the control module 3 is connected to the connection point of the third resistor 901 and the fourth capacitor 902, the other end of the third resistor 901 is connected to the output terminal of the first power supply 8, and the other end of the fourth capacitor 902 is grounded.

[0157] By adopting the above technical solution, the first power supply 8 provides more reasonable power to the control module 3, ensuring stable and reliable voltage supply.

[0158] Furthermore, the control module 3 has a voltage detection terminal 302, and the number of voltage detection terminals 302 is matched with the number of battery cells 100-1 and corresponds one-to-one, so as to detect the voltage of each battery cell 100-1 respectively. The control module 3 controls the charging state according to the detected voltage.

[0159] By adopting the above technical solution, the charging control system becomes more reasonable. The control module 3 can acquire the voltage of each battery cell 100-1, thereby determining whether the battery cell 100-1 needs charging and whether the battery cell 100-1 currently being charged has completed charging. Furthermore, the control module 3 can acquire the voltage of the battery cell 100-1 being charged in real time, so it can adjust the charging current according to the current voltage of the battery cell 100-1 being charged to achieve segmented charging, thereby ensuring the charging effect. For example, if the voltage of the battery cell 100-1 being charged is less than a first voltage value, trickle charging (1 / 10 of the preset current) is used; if the voltage of the battery cell 100-1 being charged is greater than or equal to the first voltage value, full current charging is used.

[0160] When the battery unit 100-1 uses a single lithium battery (nominal voltage 3.7V, full charge 4.2V), the first voltage value is 2.5V.

[0161] Furthermore, the voltage detection terminal 302 is directly connected to the positive terminal of the corresponding battery cell 100-1 to detect the voltage of the battery cell 100-1;

[0162] Alternatively, the voltage detection terminal 302 detects the voltage of the corresponding battery cell 100-1 through the voltage divider module 10. The voltage divider module 10 includes a first resistor 1001 and a second resistor 1002. One end of the first resistor 1001 and one end of the second resistor 1002 are connected in series. The voltage detection terminal 302 is connected to the connection point of the first resistor 1001 and the second resistor 1002. The other end of the first resistor 1001 is connected to the positive terminal of the corresponding battery cell 100-1, and the other end of the second resistor 1002 is grounded.

[0163] By adopting the above technical solution, the voltage detection terminal 302 can detect the voltage of the corresponding battery cell 100-1 more reasonably.

[0164] The voltage detection terminal 302 can not only detect the actual voltage of the corresponding battery cell 100-1 when it is charging, but also detect the voltage value of the corresponding point when multiple battery cells 100-1 are connected in series and output to the outside.

[0165] Since the voltage detection terminal 302 of the control module 3 has a threshold requirement for the voltage it can withstand, if the voltage of the corresponding battery cell 100-1 after it is fully charged is less than the voltage threshold that the voltage detection terminal 302 can withstand, and the voltage of the corresponding point when multiple battery cells 100-1 are connected in series and output to the outside is also less than the voltage threshold that the voltage detection terminal 302 can withstand, the voltage detection terminal 302 can be directly connected to the positive terminal of the corresponding battery cell 100-1, or the voltage of the corresponding battery cell 100-1 can be detected by the voltage divider module 10.

[0166] If the voltage of the corresponding battery cell 100-1 after it is fully charged is greater than the voltage threshold that the voltage detection terminal 302 can withstand, or if the voltage at the point where multiple battery cells 100-1 are connected in series and output to the outside is greater than the voltage threshold that the voltage detection terminal 302 can withstand, the voltage detection terminal 302 will detect the voltage of the corresponding battery cell 100-1 through the voltage divider module 10 to ensure that it can detect the voltage stably and reliably.

[0167] For example, the charging module 201 includes a first charging unit 2011 and a second charging unit 2012. The voltage detection terminal 302 corresponding to the first charging unit 2011 can not only detect the voltage value of the first charging unit 2011 in real time when it is charging, but also detect the voltage value of the corresponding point when the first charging unit 2011 and the second charging unit 2012 are connected in series and output to the outside, that is, the overall voltage of the charging module 201; the voltage detection terminal 302 corresponding to the second charging unit 2012 can detect the voltage value of the second charging unit 2012 in real time when it is charging.

[0168] The voltage detection terminal 302 for detecting the first charging unit 2011 detects the voltage value of the first charging unit 2011 through the voltage divider module 10; the voltage detection terminal 302 for detecting the second charging unit 2012 is directly connected to the positive terminal of the second charging unit 2012 to detect the voltage value of the second charging unit 2012.

[0169] Furthermore, the control module 3 has a current detection terminal 303, which is connected to the external power supply module 1 to detect the charging current. The control module 3 controls the charging state according to the detected charging current.

[0170] By adopting the above technical solution, the charging control system becomes more reasonable. Since the control module 3 can acquire the charging current in real time, that is, provide charging current feedback, the control module 3 can control the charging current more accurately.

[0171] Furthermore, the control module 3 has a temperature detection terminal 304, and the charging control system includes a temperature detection module 11. The temperature detection module 11 can detect the temperature during charging and output the detection result. The temperature detection terminal 304 is connected to the temperature detection module 11 to control the charging state according to the detection result of the temperature detection module 11.

[0172] By adopting the above technical solution, the charging control system becomes more reasonable, avoiding excessively high temperatures during charging. Specifically, when the real-time temperature obtained by the control module 3 exceeds the threshold, the charging circuit is cut off to ensure charging safety.

[0173] Furthermore, the temperature detection module 11 includes a fifth resistor 1101 and a thermistor 1102. One end of the fifth resistor 1101 is connected in series with one end of the thermistor 1102. The temperature detection terminal 304 is connected to the connection point of the fifth resistor 1101 and the thermistor 1102. The other end of the fifth resistor 1101 is connected to the output terminal of the first power supply 8, and the other end of the thermistor 1102 is grounded.

[0174] By adopting the above technical solution, since the thermistor 1102 is provided, the resistance of the thermistor 1102 will change when the temperature changes, thereby causing the voltage value sent by the temperature detection module 11 to the temperature detection terminal 304 to change. That is, the voltage value input to the temperature detection terminal 304 has a mapping relationship with the temperature, thereby indirectly enabling the control module 3 to obtain temperature information.

[0175] Specifically, the thermistor 1102 is a negative temperature coefficient thermistor 1102.

[0176] Furthermore, the control module 3 has a timing setting terminal 305, and the charging control system includes a timing setting module 12 for setting charging timing information. The timing setting terminal 305 is connected to the timing setting module 12 to obtain the charging timing information.

[0177] By adopting the above technical solution, the charging control system becomes more reasonable. The timing setting module 12 can set the charging timing information, and the control module 3 can control the charging status according to the charging timing information.

[0178] Furthermore, the timing setting terminal 305 obtains charging timing information based on the voltage value it receives. For example, when the timing setting terminal 305 inputs 0.1V, it corresponds to the end of charging in 1 hour; 0.15V corresponds to the end of charging in 1.5 hours; 0.2V corresponds to the end of charging in 2 hours; 0.25V corresponds to the end of charging in 2.5 hours, and so on.

[0179] The timing setting module 12 includes a sixth resistor 1201 and a seventh resistor 1202. One end of the sixth resistor 1201 is connected in series with one end of the seventh resistor 1202. The timing setting terminal 305 is connected to the connection point of the sixth resistor 1201 and the seventh resistor. The other end of the sixth resistor 1201 is connected to the output terminal of the first power supply 8. The other end of the seventh resistor 1202 is grounded.

[0180] By adopting the above technical solution, the timing setting terminal 305 and the timing setting module 12 are made more reasonable; the ratio of the sixth resistor 1201 and the seventh resistor 1202 can set the voltage value input to the timing setting terminal 305, that is, changing the ratio of the sixth resistor 1201 and the seventh resistor 1202 can realize the control of the charging time; the sixth resistor 1201 and the seventh resistor 1202 can be fixed resistors, and the ratio of the sixth resistor 1201 and the seventh resistor 1202 can be set by the factory; of course, the sixth resistor 1201 or the sixth resistor 1202 can be a variable resistor, and the ratio of the sixth resistor 1201 and the seventh resistor 1202 can be set by the user.

[0181] Furthermore, the charging control system includes a charging indicator module 13 for indicating the charging status. The charging indicator module 13 includes a charging indicator light 1301 and a full charge indicator light 1302. The positive terminals of the charging indicator light 1301 and the full charge indicator light 1302 are connected to the output terminal of the first power supply 8. The negative terminal of the charging indicator light 1301 is connected to the charging indicator light control terminal 306 of the control module 3. The negative terminal of the full charge indicator light 1302 is connected to the full charge indicator light control terminal 307 of the control module 3. When the charging stage is in progress, the control module 3 controls the charging indicator light 1301 to work. When the charging stage is in progress, the control module 3 controls the full charge indicator light 1302 to work.

[0182] By adopting the above technical solution, the charging control system allows users to understand the charging status by observing the charging indicator module 13. That is, when the charging indicator 1301 is lit, it indicates that the system is in the charging stage, and when the fully charged indicator 1302 is lit, it indicates that the system is in the fully charged stage.

[0183] Specifically, the charging indicator light 1301 is configured to emit a red light when working, and the fully charged indicator light 1302 is configured to emit a green light when working.

[0184] Furthermore, the charging indicator module 13 includes an indicator current-limiting resistor 1303 for limiting the current flowing through the charging indicator light 1301 and the full charge indicator light 1302. The output terminal of the first power supply 8 is connected to the positive terminals of the charging indicator light 1301 and the full charge indicator light 1302 through the indicator current-limiting resistor 1303.

[0185] By adopting the above technical solution, the charging indicator module 13 becomes more reasonable; the setting of the indicator current limiting resistor 1303 can limit the current flowing through the charging indicator light 1301 and the full charge indicator light 1302, ensuring that they can work stably and reliably.

[0186] Furthermore, the first power supply 8 is an LDO module 801. The input terminal of the LDO module 801 is connected to the external positive terminal 101 of the external power supply module 1 and the positive terminal of the battery module 100, respectively. The ground terminal of the LDO module 801 is grounded, and the output terminal of the LDO module 801 is formed as the output terminal of the first power supply 8.

[0187] By adopting the above technical solution, the first power supply 8 is made more reasonable and can realize adaptive power supply, that is, realize the automatic switching between the power supply of the charging power supply 200 and the power supply of the battery module 100, and provide a high-precision and low-power power supply system; specifically, the LDO module 801 adopts a low-power and high-precision LDO chip.

[0188] Furthermore, the external positive terminal 101 of the external power supply module 1 is connected to the input terminal of the LDO module 801 through the second diode 14, and the positive terminal of the battery module 100 is connected to the input terminal of the LDO module 801 through the third diode 15.

[0189] Specifically, the external positive terminal 101 of the external power supply module 1 is connected to the positive terminal of the second diode 14, and the negative terminal of the second diode 14 is connected to the input terminal of the LDO module 801; the positive terminal of the battery module 100 is connected to the positive terminal of the third diode 15, and the negative terminal of the third diode 15 is connected to the input terminal of the LDO module 801.

[0190] By adopting the above technical solution, the first power supply 8 is more reasonable, and the arrangement of the second diode 14 and the third diode 15 can achieve isolation between the charging power supply 200 and the battery module 100.

[0191] Furthermore, a second capacitor 16 is connected in parallel between the input terminal and the ground terminal of the LDO module 801, and a third capacitor 17 is connected in parallel between the output terminal and the ground terminal of the LDO module 801.

[0192] By adopting the above technical solution, the first power supply 8 becomes more reasonable, and the setting of the second capacitor 16 and the third capacitor 17 can be used for noise filtering.

[0193] Furthermore, when the first controllable switch 2011-1 is provided, the control module 3 has a first controllable switch control terminal 308, and the number of the first controllable switch control terminals 308 is matched with the number of the first controllable switches 2011-1 and they are matched one by one.

[0194] When the second controllable switch 2012-1 is provided, the control module 3 has a second controllable switch control terminal 309, and the number of the second controllable switch control terminals 309 is matched with the number of the second controllable switches 2012-1 and they are matched one by one.

[0195] The first controllable switch control terminal 308 turns on the first controllable switch 2011-1 by outputting a PWM signal, and / or the second controllable switch control terminal 309 turns on the second controllable switch 2012-1 by outputting a PWM signal.

[0196] By adopting the above technical solution, the control module 3 becomes more reasonable; by outputting a PWM signal to turn on the first controllable switch 2011-1 or the second controllable switch 2012-1, the charging current can be adjusted. Specifically, the charging current can be adjusted by adjusting the duty cycle of the PWM signal.

[0197] Furthermore, the external power supply module 1 is a USB interface, the charging power supply 200 is a USB charger, and the control module 3 is an MCU or a system composed of logic electronic components.

[0198] By adopting the above technical solution, the charging control system becomes more reasonable. Specifically, the USB charger is a 5V USB charger, and the battery module 100 is composed of two lithium batteries connected in series, with an output voltage of 8.4V.

[0199] A lighting fixture includes the aforementioned charging control system, a lighting module for illumination, and a battery module 100 for power supply. The battery module 100 comprises a plurality of battery cells 100-1 connected in series. The charging control system is connected to the battery module 100 to charge it, and the battery module 100 is connected to the lighting module to supply power to it. The control module 3 of the charging control system is connected to the lighting module to control its operating state.

[0200] The above technical solution makes the lamp more reasonable. Specifically, the control module 3 has a light control terminal 3010, which is connected to the lighting module to operate as a controller. The light control terminal 3010 dims the light by adjusting the duty cycle of its output PWM signal. More specifically, to extend the discharge time of the battery module 100, when the voltage of the battery module 100 is greater than the second voltage value, the duty cycle of the PWM output is 100%. Afterward, for each voltage step decrease in the voltage of the battery module 100, the PWM duty cycle decreases linearly by 10%. When the voltage of the battery module 100 is less than the third voltage value, the PWM duty cycle remains unchanged at 10%. When the voltage of the battery module 100 is less than the third voltage value, the power is turned off. The battery module 100 is composed of two lithium batteries connected in series. The second voltage value is 7.2V, the voltage step value is 0.1V, the third voltage value is 6.3V, and the fourth voltage value is 5.8V.

[0201] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0202] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be defined by the scope of the claims.

Claims

1. A charging control system for charging a battery module (100) composed of multiple battery cells (100-1) connected in series, characterized in that, include: An external power supply module (1) is used to connect to a charging power supply (200) to introduce electrical energy; The charging circuit includes a charging module (201), the number of which matches the number of battery cells (100-1) and is matched one-to-one; when the charging module (201) is in the conducting state, it can connect the corresponding battery cell (100-1) to the external power module (1) so that a loop is established between the corresponding battery cell (100-1) and the charging power supply (200); when the charging module (201) is in the disconnected state, it can disconnect the corresponding battery cell (100-1) from the external power module (1) so that the loop between the corresponding battery cell (100-1) and the charging power supply (200) is cut off. And a control module (3), which is connected to multiple charging modules (201) respectively to control the on / off state of each charging module (201) so that multiple battery cells (100-1) are charged in a time-sharing manner.

2. The charging control system according to claim 1, characterized in that: The external power module (1) includes an external positive terminal (101) for connecting to the positive output terminal of the charging power supply (200) and an external negative terminal (102) for connecting to the negative output terminal of the charging power supply (200). The charging module (201) includes a first charging unit (2011) and a second charging unit (2012). The first charging unit (2011) is disposed between the external positive terminal (101) of the external power module (1) and the positive terminal of the corresponding battery unit (100-1) for connecting the external positive terminal (101) of the external power module (1) and the positive terminal of the corresponding battery unit (100-1). The second charging unit (2012) is disposed between the external negative terminal (102) of the external power module (1) and the negative terminal of the corresponding battery unit (100-1) for connecting the external negative terminal (102) of the external power module (1) and the negative terminal of the corresponding battery unit (100-1). The first charging unit (2011) includes a first controllable switch (2011-1), the first switch terminal (2011-11) of the first controllable switch (2011-1) is connected to the external positive terminal (101) of the external power module (1), the second switch terminal (2011-12) of the first controllable switch (2011-1) is connected to the positive terminal of the corresponding battery unit (100-1), and the control module (3) is connected to the first control terminal (2011-13) of the first controllable switch (2011-1) to control the on / off state between the first switch terminal (2011-11) and the second switch terminal (2011-12); And / or the second charging unit (2012) includes a second controllable switch (2012-1), the third switch terminal (2012-11) of the second controllable switch (2012-1) is connected to the external negative terminal (102) of the external power module (1), the fourth switch terminal (2012-12) of the second controllable switch (2012-1) is connected to the negative terminal of the corresponding battery unit (100-1), and the control module (3) is connected to the second control terminal (2012-13) of the second controllable switch (2012-1) to control the on / off state between the third switch terminal (2012-11) and the fourth switch terminal (2012-12).

3. The charging control system according to claim 2, characterized in that: The first controllable switch (2011-1) adopts a first MOSFET (2011-2), which is a P-MOSFET. The drain (D) of the first MOSFET (2011-2) is formed as the first switch terminal (2011-11) and connected to the positive output terminal of the charging power supply (200). The source (S) of the first MOSFET (2011-2) is formed as the second switch terminal (2011-12) and connected to the positive terminal of the corresponding battery cell (100-1). The gate (G) of the first MOSFET (2011-2) is formed as the first control terminal (2011-13). The second controllable switch (2012-1) adopts a second MOSFET (2012-2), which is an N-MOSFET. The source (S) terminal of the second MOSFET (2012-2) is formed as the third switch terminal (2012-11) and connected to the negative output terminal of the charging power supply (200). The drain (D) terminal of the second MOSFET (2012-2) is formed as the fourth switch terminal (2012-12) and connected to the negative terminal of the corresponding battery cell (100-1). The gate (G) terminal of the second MOSFET (2012-2) is formed as the second control terminal (2012-13).

4. The charging control system according to claim 2 or 3, characterized in that: The battery module (100) includes a first battery unit (100-1b) and a second battery unit (100-1) connected in series. Correspondingly, the charging module (201) includes a first charging module (201a) corresponding to the first battery unit (100-1b) and a second charging module (201b) corresponding to the second battery unit (100-1). The first charging unit (2011) in the first charging module (201a) is used to connect the external positive terminal (101) of the external power module (1) to the positive terminal of the first battery unit (100-1b), and the second charging unit (2012) in the first charging module (201a) is used to connect the external negative terminal (102) of the external power module (1) to the negative terminal of the first battery unit (100-1b); the first charging unit (2011) in the second charging module (201b) is used to connect the external positive terminal (101) of the external power module (1) to the positive terminal of the second battery unit (100-1), and the second charging unit (2012) in the second charging module (201b) is used to connect the external negative terminal (102) of the external power module (1) to the negative terminal of the second battery unit (100-1).

5. The charging control system according to claim 2, characterized in that: Includes an output control switch (4), which is connected in series between the battery cell (100-1) and the battery cell (100-1), and / or connected in series on the positive side of the battery module (100), and / or connected in series on the negative side of the battery module (100), to control whether the battery module (100) can output electrical energy to the outside; When the output control switch (4) is connected in series on the positive side of the battery module (100), the first battery cell (100-1) is referred to as the first battery cell (100-1c). The positive terminal of the first battery cell (100-1c) is formed as the positive terminal of the battery module (100). The positive terminal of the first battery cell (100-1c) is connected to an external load through the first controllable switch (2011-1) in the first charging unit (2011) corresponding to it. The first controllable switch (2011-1) corresponding to the positive terminal of the first battery cell (100-1c) is formed as the output control switch (4). When the output control switch (4) is connected in series on the negative side of the battery module (100), the last battery cell (100-1) is referred to as the last battery cell (100-1d). The negative terminal of the last battery cell (100-1d) is formed as the negative terminal of the battery module (100). The negative terminal of the last battery cell (100-1d) is connected to an external load through the second controllable switch (2012-1) in the second charging unit (2012) corresponding to it. The second controllable switch (2012-1) corresponding to the negative terminal of the last battery cell (100-1d) is formed as the output control switch (4).

6. The charging control system according to claim 2, characterized in that: The external power supply module (1) includes an external positive terminal (101) for connecting to the positive output terminal of the charging power supply (200) and an external negative terminal (102) for connecting to the negative output terminal of the charging power supply (200). The charging module (201) is connected to the positive output terminal of the charging power supply (200) by connecting to the external positive terminal (101), and the charging module (201) is connected to the negative output terminal of the charging power supply (200) by connecting to the external negative terminal (102). The charging control system includes a noise filtering module (5) for filtering line noise, and the noise filtering module (5) is connected to the external power supply module (1). The noise filtering module (5) includes a first capacitor (501) and a fifth capacitor (502), and the first capacitor (501) and the second capacitor (16) are connected in parallel to the external positive terminal (101) and the external negative terminal (102). The fifth capacitor (502) is an electrolytic capacitor; The charging control system includes a first diode (6), the positive terminal of the first diode (6) is connected to the external positive terminal (101) of the external power supply module (1), and the negative terminal of the first diode (6) is connected to the charging module (201). A charging current-limiting resistor (7) is connected in series between the external power supply module (1) and the charging circuit to limit the charging current.

7. The charging control system according to claim 4, characterized in that: Includes a first power supply (8) for providing electrical energy, and the control module (3) is connected to the output terminal of the first power supply (8) to obtain electrical energy; The first power supply (8) supplies power to the control module (3) through the filter module (9); the filter module (9) includes a third resistor (901) and a fourth capacitor (902), one end of the third resistor (901) is connected in series with one end of the fourth capacitor (902), the power supply terminal (301) of the control module (3) is connected to the connection point of the third resistor (901) and the fourth capacitor (902), the other end of the third resistor (901) is connected to the output terminal of the first power supply (8), and the other end of the fourth capacitor (902) is grounded; The control module (3) has a voltage detection terminal (302), and the number of voltage detection terminals (302) is matched with the number of battery cells (100-1) and corresponds one-to-one, so as to detect the voltage of each battery cell (100-1) respectively. The control module (3) controls the charging state according to the detected voltage. The voltage detection terminal (302) is directly connected to the positive terminal of the corresponding battery cell (100-1) to detect the voltage of the battery cell (100-1); Alternatively, the voltage detection terminal (302) detects the voltage of the corresponding battery cell (100-1) through the voltage divider module (10). The voltage divider module (10) includes a first resistor (1001) and a second resistor (1002). One end of the first resistor (1001) and one end of the second resistor (1002) are connected in series. The voltage detection terminal (302) is connected to the connection point of the first resistor (1001) and the second resistor (1002). The other end of the first resistor (1001) is connected to the positive terminal of the corresponding battery cell (100-1), and the other end of the second resistor (1002) is grounded. The control module (3) has a current detection terminal (303), which is connected to the external power supply module (1) to detect the charging current. The control module (3) controls the charging state according to the detected charging current. The control module (3) has a temperature detection terminal (304), and the charging control system includes a temperature detection module (11). The temperature detection module (11) can detect the temperature during charging and output the detection result. The temperature detection terminal (304) is connected to the temperature detection module (11) to control the charging state according to the detection result of the temperature detection module (11). The temperature detection module (11) includes a fifth resistor (1101) and a thermistor (1102). One end of the fifth resistor (1101) is connected in series with one end of the thermistor (1102). The temperature detection terminal (304) is connected to the connection point of the fifth resistor (1101) and the thermistor (1102). The other end of the fifth resistor (1101) is connected to the output terminal of the first power supply (8). The other end of the thermistor (1102) is grounded. The control module (3) has a timing setting terminal (305), and the charging control system includes a timing setting module (12) for setting charging timing information. The timing setting terminal (305) is connected to the timing setting module (12) to obtain charging timing information. The timing setting terminal (305) obtains charging timing information based on the voltage value it receives. The timing setting module (12) includes a sixth resistor (1201) and a seventh resistor (1202). One end of the sixth resistor (1201) is connected in series with one end of the seventh resistor (1202). The timing setting terminal (305) is connected to the connection point of the sixth resistor (1201) and the seventh resistor. The other end of the sixth resistor (1201) is connected to the output terminal of the first power supply (8). The other end of the seventh resistor (1202) is grounded. The charging control system includes a charging indicator module (13) for indicating the charging status. The charging indicator module (13) includes a charging indicator (1301) and a full charge indicator (1302). The positive terminals of the charging indicator (1301) and the full charge indicator (1302) are connected to the output terminal of the first power supply (8). The negative terminal of the charging indicator (1301) is connected to the charging indicator control terminal (306) of the control module (3). The negative terminal of the full charge indicator (1302) is connected to the full charge indicator control terminal (307) of the control module (3). When the charging stage is in progress, the control module (3) controls the charging indicator (1301) to work. When the full charge stage is in progress, the control module (3) controls the full charge indicator (1302) to work. The charging indicator module (13) includes an indicator current-limiting resistor (1303) for limiting the current flowing through the charging indicator (1301) and the full charge indicator (1302). The output terminal of the first power supply (8) is connected to the positive terminals of the charging indicator (1301) and the full charge indicator (1302) through the indicator current-limiting resistor (1303).

8. The charging control system according to claim 7, characterized in that: The first power supply (8) is an LDO module (801). The input terminal of the LDO module (801) is connected to the external positive terminal (101) of the external power supply module (1) and the positive terminal of the battery module (100), respectively. The ground terminal of the LDO module (801) is grounded, and the output terminal of the LDO module (801) is formed as the output terminal of the first power supply (8). The positive terminal (101) of the external power supply module (1) is connected to the input terminal of the LDO module (801) through the second diode (14), and the positive terminal of the battery module (100) is connected to the input terminal of the LDO module (801) through the third diode (15). A second capacitor (16) is connected in parallel between the input terminal of the LDO module (801) and the ground terminal of the LDO module (801), and a third capacitor (17) is connected in parallel between the output terminal of the LDO module (801) and the ground terminal of the LDO module (801).

9. The charging control system according to claim 2, characterized in that: When the first controllable switch (2011-1) is provided, the control module (3) has a first controllable switch control terminal (308), and the number of the first controllable switch control terminals (308) is matched with the number of the first controllable switches (2011-1) and they are matched one by one. When the second controllable switch (2012-1) is provided, the control module (3) has a second controllable switch control terminal (309), and the number of the second controllable switch control terminals (309) is matched with the number of the second controllable switches (2012-1) and they are matched one by one. The first controllable switch control terminal (308) turns on the first controllable switch (2011-1) by outputting a PWM signal, and / or the second controllable switch control terminal (309) turns on the second controllable switch (2012-1) by outputting a PWM signal.

10. A lamp, characterized in that: The system includes a charging control system as described in any one of claims 1 to 9, a lighting module for lighting, and a battery module (100) for power supply, wherein the battery module (100) comprises a plurality of battery cells (100-1) connected in series, the charging control system is connected to the battery module (100) for charging, the battery module (100) is connected to the lighting module for power supply, and the control module (3) of the charging control system is connected to the lighting module to control its operating state.

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