CN214280975U - Multi-system battery pack charging circuit - Google Patents
Multi-system battery pack charging circuit Download PDFInfo
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- CN214280975U CN214280975U CN202120094400.9U CN202120094400U CN214280975U CN 214280975 U CN214280975 U CN 214280975U CN 202120094400 U CN202120094400 U CN 202120094400U CN 214280975 U CN214280975 U CN 214280975U
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Abstract
The utility model discloses a multi-system battery pack charging circuit, which is used for controlling a charger to charge a plurality of battery packs and comprises a main control module, a voltage stabilizing module, a voltage detection module, a current detection module, a Bluetooth communication module and a relay module; the input end of the relay module is connected with the charger interface, the output end of the relay module is connected with the battery pack, the control end of the relay module is connected with the main control module, and the main control module controls the actuation state of the relay; the input end of the voltage stabilizing module is connected with the charger interface, and the output end of the voltage stabilizing module is connected with the main control module; the input end of the voltage detection module is connected with the battery pack, and the output end of the voltage detection module is connected with the main control module; the input end of the current detection module is connected with the charger interface, and the output end of the current detection module is connected with the main control module; the main control module collects voltage and current information, controls whether the relay where each battery pack is located is closed or not, and switches states when the system is charged, so that the electric quantity consumption is reduced, and automatic control is realized.
Description
Technical Field
The utility model relates to a plurality of battery package charging circuit system field, concretely relates to multi-system battery package charging circuit.
Background
The battery pack is an integral formed by connecting a plurality of small batteries in series and parallel, has the advantages of high energy density, long service life, light weight, environmental protection and the like, and along with the rapid development of the microelectronic technology industry, the small-sized equipment manufacturing industry is flourishing day by day, and the application of the small-sized equipment manufacturing industry is also widely developed.
Since many devices have propulsion, main control and other systems, which have differences in the discharge characteristics of battery packs, most devices also divide battery packs into power battery packs and main control battery packs. When the device is divided into a plurality of system battery packs by a plurality of systems, the plurality of battery packs need to be charged in an equalizing manner according to the power failure characteristics of different battery packs. Along with the use consumption of equipment, the ageing degree and the damage degree of each battery pack are inconsistent, so that the two battery packs are charged by a single charger at the same time, reasonable balance cannot be carried out, and the phenomenon of insufficient charging can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve among the prior art to single charger when charging to a plurality of battery packages, can not reasonable equilibrium, lead to the not full defect of charging, provide a multi-system battery package charging circuit.
The utility model discloses an adopt following technical scheme to realize: a charging circuit for multiple system battery packs is used for controlling a charger to charge a plurality of battery packs and comprises a main control module, a voltage stabilizing module, a voltage detection module, a current detection module, a Bluetooth communication module and a relay module;
the input end of the relay module is connected with the charger interface, the output end of the relay module is connected with the battery pack, the control end of the relay module is connected with the main control module, the main control module controls the actuation state of the relays, and the number of the relays corresponds to the number of the battery packs one to one; the input end of the voltage stabilizing module is connected with the charger interface, the output end of the voltage stabilizing module is connected with the main control module, and the voltage of the charger is stabilized and converted into the power supply voltage of the charging circuit to be supplied to the main control module; the input end of the voltage detection module is connected with the battery pack, the output end of the voltage detection module is connected with the main control module, voltage division processing is carried out on the voltage of the battery pack, and the converted voltage is supplied to the main control module; the input end of the current detection module is connected with the charger interface, and the output end of the current detection module is connected with the main control module, so that the charging current of the lithium battery is subjected to voltage conversion and is transmitted to the main control module; the main control module collects voltage and current information, controls whether the relay where each battery pack is located is closed or not, and switches states when the system is charged, so that the electric quantity consumption is reduced, and automatic control is realized.
Furthermore, the main control module adopts Arduino ATmega2560, and the voltage stabilizing module adopts LM2596, and the input of charger is input LM2596 after a electric capacity C1 filters as the input of voltage stabilizing module and is carried out the steady voltage, and the output of LM2596 is through inductance L1, and zener diode D1 exports for main control module and relay module power supply.
Furthermore, the relay module comprises a relay 1, a relay 2 and a relay 3 … …, the relay adopts an SRD-12VDC-SL-C, and the connection modes of the relay 1, the relay 2, the relay 3 … … and the relay n and corresponding peripheral circuits are the same;
triode Q1 is connected to relay 1's drive end, triode Q1 is connected with the master control module IO pin behind the current-limiting resistor R1, connect pull-down resistor R2 between triode Q1's the base and the projecting pole, draw down when master control module IO pin level state is high attitude is uncertain, Q1's collecting electrode and relay coil are connected, the relay switch input is the charger input, the battery package is inserted in the output, can charge after the actuation, freewheel diode D6 is connected at relay coil both ends, prevent coil switch's the anti-electromotive force in the twinkling of an eye.
Further, the voltage detection module comprises an MC33202 comparator, an input1s + input end of the MC33202 comparator is connected with a voltage dividing resistor R10 and a voltage dividing resistor R11, two ends of the voltage dividing resistor R11 are connected with a filter capacitor C3 in parallel, an output of the battery pack is connected with the voltage dividing resistors R10 and R11 for voltage division, and the voltage division is filtered by the filter capacitor C3 and is connected to an input1s + input end of the MC 33202.
Furthermore, the battery pack is connected with two diodes D3 before being connected with an input1s + input end of the comparator MC33202, and an output1 output end of the comparator MC33202 is connected with a resistor R13,R12The voltage is divided, filtered by a capacitor C4 and then connected to an IO port A4 of the master control module, an output2 output end of the comparator MC33202 is connected with a resistor R16,R17The voltage is divided and filtered by a capacitor C6 to be connected to an IO port A2 of the main control module.
Furthermore, the current detection module adopts LTC6102HVHMS8, the input of the charger is connected with the input of the current detection module through a pull-up resistor R18, and the output of the current detection module is connected with the IO port a6 of the main control module after being divided by voltage of voltage dividing resistors R19 and R20, so as to be used for main control acquisition.
Furthermore, a serial port pin of the main control module is also connected with a bluetooth module, and the bluetooth module adopts HC 05.
Furthermore, the output end of the LM2596 is connected in parallel with a current limiting resistor R7 and a light emitting diode D2 for power-on indication, and the current limiting resistor R7 is connected in series with the light emitting diode D2.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
the charging circuit design provided by the scheme can be used for independently charging each battery pack, monitoring the charging state, preventing overcharge and realizing equalizing charge; utilize relay and low-power consumption master control to accomplish charging and charging parameter monitoring to a plurality of independent systems, avoid a plurality of battery packages direct charging to bring discontented that charges, phenomenon such as battery damage, rely on bluetooth equipment to carry out the bluetooth transmission simultaneously and show, real time monitoring charged state and accomplish charge protection.
Drawings
Fig. 1 is a schematic block diagram of a battery pack charging circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a charging circuit according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the above objects, features and advantages of the present invention, the present invention will be further described with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the specific embodiments disclosed below.
The charging circuit provided by the scheme can charge the battery pack of a certain system at the same time, and the charging of the battery pack depends on the monitoring of the charging current and the voltage of the battery pack by the acquisition element, so that the equalization is carried out. The main control module detects the voltage and the charging current of the plurality of battery packs, the charging of the plurality of battery packs is completed by utilizing the switching characteristic of relay pull-in disconnection, the balance of the charging of the battery by the charger is controlled in a balanced manner, an upper-layer user autonomous control charging strategy can be carried out through Bluetooth, feedback communication is carried out with the user, and two charging modes of autonomous control and remote control are realized.
Specifically, as shown in fig. 1 and 2, the charging circuit is used for controlling a charger to charge a plurality of battery packs, and includes a main control module 1, a voltage stabilizing module 2, a voltage detecting module 3, a current detecting module 4, a bluetooth communication module 5, and a relay module 6; the input end of the relay module is connected with the charger interface, the output end of the relay module is connected with the battery pack, the control end of the relay module is connected with the main control module, and the main control module controls the actuation state of the relay; the input end of the voltage stabilizing module is connected with the charger interface, the output end of the voltage stabilizing module is connected with the main control module, and the voltage of the charger is stabilized and converted into the power supply voltage of the charging circuit to be supplied to the main control module; the input end of the voltage detection module is connected with the battery pack, the output end of the voltage detection module is connected with the main control module, voltage division processing is carried out on the voltage of the battery pack, and the converted voltage is supplied to the main control module; the input end of the current detection module is connected with the charger interface, and the output end of the current detection module is connected with the main control module, so that the charging current of the lithium battery is subjected to voltage conversion and is transmitted to the main control module; the main control module collects voltage and current information, controls whether the relay where each battery pack is located is closed or not, and switches states when the system is charged, so that the electric quantity consumption is reduced, and automatic control is realized.
As shown in fig. 2, in the present embodiment, the main control module adopts Arduino ATmega 2560; the voltage stabilizing module adopts LM2596, the charger input is used as a voltage stabilizing input, the voltage stabilizing input is filtered by a capacitor C1 and then input into the LM2596 for voltage stabilization, the output is output through an inductor L1, a voltage stabilizing diode D1 is output to supply power to the main control module and the relay module, and a current limiting resistor R7 and a light emitting diode D2 are connected in parallel for power-on indication; the relay module adopts SRD-12VDC-SL-C and is driven by triodes (Q1, Q2, Q3 and Q4), taking the first relay on the left in the figure as an example: triode Q1 is connected with master control module IO pin D6 behind through current-limiting resistor R1, pull-down resistor R2 has been connected to Q1's base and projecting pole, draw down when D6 level state high resistance state is uncertain, Q1's collecting electrode and relay coil are connected, the relay switch input is the charger input, the output inserts the battery package, can charge after the actuation, follow current diode D6 is inserted to the coil both sides, prevent coil switch's the momentary anti-electromotive force that generates. Other relays are also connected in the same way, and each battery pack is provided with a relay control at the positive electrode and the negative electrode respectively; the voltage detection module is realized by an MC33202 comparator chip, the output of the battery pack is connected into voltage dividing resistors of R10 and R11 for voltage division, a capacitor C3 for filtering is connected into the input end of the comparator MC33202, and two diodes D3(BAT54S) are connected before the input. The output (output1) of the comparator MC33202 passes through a circuit such as R13,R12The resistor divides voltage, the voltage is filtered and converted into 0-5V voltage through a capacitor C4 to be connected into a main control IO port A4, and the output end (output2) of the comparator MC33202 passes through a resistor R16,R17Resistance voltage division, filtering and converting the voltage into 0-5V voltage through a capacitor C6, and accessing the voltage into a master control IO port A2 for master control acquisition; the current detection module adopts LTC6102HVHMS8, the charger input is input by pulling up through a R18 pull-up resistor, the output is connected with a main control IO port A6 after being divided by R19 and R20, and is used for main control acquisition; the Bluetooth is connected with a serial port pin of the main control module by adopting an HC05 Bluetooth module.
Taking the battery pack 1 as an example, when the IO port D6 is set to a low level by the main control module, the triode Q1 is turned off and is not turned on, so that the relay coil is not energized, the relay switch is not attracted, and the charger does not charge the battery pack 1; when the IO port D6 is set to a high level by the main control chip, the transistor Q1 is in saturation conduction, so that the coil of the relay is energized, the switch is pulled in by the magnetic field of the relay, and the charger charges the battery pack 1. The control theory of other battery pack relays is the same. The voltage acquisition is realized by dividing voltage through resistors, preventing current from interfering the main control chip by using a voltage follower device and then dividing the voltage into 0-5V voltage which can be acquired by main control. The current of the charger is converted into voltage through a resistor connected in a passage in series, and the voltage is divided into 0-5V voltage for main control collection.
As shown in fig. 1, the utility model discloses, through the relay switch of each battery package of master control module control, let the input of charger charge for it in corresponding battery package. Each battery pack is controlled by one relay, the main control only controls one relay to be attracted at the same moment, and the rest of the battery packs are disconnected, namely only one battery pack is charged, so that the situations of charging dissatisfaction and the like caused by different characteristics of the battery packs are ensured. The master control is supplied with power by the voltage stabilizing module, can receive a control relay high-low command sent by a user through Bluetooth, and can also receive data feedback of the battery through the Bluetooth. The master control collects the current of the charger and the voltage of each battery pack to automatically or remotely control charging.
The main control module controls the specific functions as follows: the voltage acquisition module respectively collects and detects the battery packs of each system during electrification, the master control preferentially charges the batteries with low battery voltage (the master control IO port sends high and low levels to control whether the relay is closed or not, so that the relay of the battery pack with low electric quantity is closed or not, and other circuits are disconnected), and the current of the charger and the voltage of each battery pack are monitored. The next charging process is divided into two states, the charging process is controlled by the Bluetooth chip to be switched, the charging process is in an automatic control mode and a remote control mode, the charging process is in the automatic control mode by default, and the charging process enters the remote control mode after receiving a remote control instruction sent by a user. A self-control mode: when the battery is charged for one hour or the charging current is 0 (the battery is fully charged), the main controller sends out a signal to control the relay to disconnect the charging and compare the voltage of each battery pack, and the battery with low electric quantity is continuously charged preferentially, and the steps are repeated. Until the charging current of the two lithium batteries is 0 and the voltage is charged to the full charging voltage, the main control module controls the relay to be disconnected, and the charging is not carried out any more. Remote control mode: if the Bluetooth chip is not controlled, the battery is charged all the time, the Bluetooth chip receives a specific command sent by a user, then the master control responds, sends out corresponding high and low levels to control the relay to attract or disconnect other rechargeable batteries, and sends the corresponding high and low levels to the user to display the charging voltage and current in real time.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. A multi-system battery pack charging circuit is used for controlling a charger to charge a plurality of battery packs and is characterized by comprising a main control module, a voltage stabilizing module, a voltage detection module, a current detection module, a Bluetooth communication module and a relay module;
the input end of the relay module is connected with the charger interface, the output end of the relay module is connected with the battery pack, the control end of the relay module is connected with the main control module, the main control module controls the actuation state of the relays, and the number of the relays corresponds to the number of the battery packs one to one; the input end of the voltage stabilizing module is connected with the charger interface, the output end of the voltage stabilizing module is connected with the main control module, and the voltage of the charger is stabilized and converted into the power supply voltage of the charging circuit to be supplied to the main control module; the input end of the voltage detection module is connected with the battery pack, the output end of the voltage detection module is connected with the main control module, voltage division processing is carried out on the voltage of the battery pack, and the converted voltage is supplied to the main control module; the input end of the current detection module is connected with the charger interface, and the output end of the current detection module is connected with the main control module, so that the charging current of the lithium battery is subjected to voltage conversion and is transmitted to the main control module.
2. The multi-system battery pack charging circuit of claim 1, wherein: the main control module adopts Arduino ATmega2560, and the voltage stabilizing module adopts LM2596, and the input of charger is inputed LM2596 and is carried out the steady voltage as the input of voltage stabilizing module after a electric capacity C1 filtering, and LM 2596's output is through inductance L1, and zener diode D1 exports for main control module and relay module power supply.
3. The multi-system battery pack charging circuit of claim 2, wherein: the relay module comprises a relay 1, a relay 2 and a relay 3 … …, the relay adopts an SRD-12VDC-SL-C, and the connection modes of the relay 1, the relay 2, the relay 3 … … and the relay n are the same as those of the corresponding peripheral circuits;
the drive end of the relay 1 is connected with a triode Q1, the triode Q1 is connected with an IO pin of the main control module after passing through a current-limiting resistor R1, a pull-down resistor R2 is connected between the base electrode and the emitting electrode of the triode Q1, and two ends of a coil of the relay are connected with a freewheeling diode D6.
4. The multi-system battery pack charging circuit of claim 3, wherein: the voltage detection module comprises an MC33202 comparator, an input1s + input end of the MC33202 comparator is connected with a divider resistor R10 and an R11, two ends of the divider resistor R11 are connected with a filter capacitor C3 in parallel, the output of the battery pack is connected with divider resistors R10 and R11 for voltage division, the voltage division is carried out through the filter capacitor C3 for filtering, and the input1s + input end of the comparator MC33202 is accessed.
5. The multi-system battery pack charging circuit of claim 4, wherein: the battery pack is connected with two diodes D3 before being connected with an input1s + input end of a comparator MC33202, an output1 output end of the comparator MC33202 is connected with resistors R13 and R12 for voltage division, and is connected with an IO port A4 of the main control module after being filtered by a capacitor C4, an output2 output end of the comparator MC33202 is connected with resistors R16 and R17 for voltage division, and is connected with an IO port A2 of the main control module after being filtered by a capacitor C6.
6. The multi-system battery pack charging circuit of claim 5, wherein: the current detection module adopts LTC6102HVHMS8, the input of the charger is connected with the input of the current detection module through a pull-up resistor R18, the output of the current detection module is connected with an IO port A6 of the main control module after being divided by voltage of voltage dividing resistors R19 and R20, and the output is used for main control acquisition.
7. The multi-system battery pack charging circuit of claim 2, wherein: the serial port pin of the main control module is also connected with a Bluetooth module, and the Bluetooth module adopts HC 05.
8. The multi-system battery pack charging circuit of claim 2, wherein: the output end of the LM2596 is connected with a current limiting resistor R7 and a light emitting diode D2 in parallel for power-on indication, and the current limiting resistor R7 is connected with the light emitting diode D2 in series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120094400.9U CN214280975U (en) | 2021-01-14 | 2021-01-14 | Multi-system battery pack charging circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120094400.9U CN214280975U (en) | 2021-01-14 | 2021-01-14 | Multi-system battery pack charging circuit |
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| CN214280975U true CN214280975U (en) | 2021-09-24 |
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