CN111694391A - Lithium battery pack current output system based on mobile phone Bluetooth control - Google Patents
Lithium battery pack current output system based on mobile phone Bluetooth control Download PDFInfo
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- CN111694391A CN111694391A CN201910189873.4A CN201910189873A CN111694391A CN 111694391 A CN111694391 A CN 111694391A CN 201910189873 A CN201910189873 A CN 201910189873A CN 111694391 A CN111694391 A CN 111694391A
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- circuit
- battery pack
- lithium battery
- power supply
- current
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/461—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using an operational amplifier as final control device
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
- G05F1/573—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25186—Bluetooth
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Computer Networks & Wireless Communication (AREA)
- Battery Mounting, Suspending (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of battery packs, in particular to a lithium battery pack current output system based on mobile phone Bluetooth control. The device comprises a Bluetooth module, a single chip microcomputer, a power supply voltage stabilization detection circuit, a battery pack, a lithium battery protection circuit, a discharge detection control circuit and a load. The Bluetooth module is combined with a universal lithium battery protection circuit for use, specifically realizes the control of the output and stop of the battery voltage, and simultaneously combines the Bluetooth module and the mobile phone for Bluetooth communication, so as to realize the output of the current of the Bluetooth control lithium battery pack, and the operation is very convenient.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a lithium battery pack current output system based on mobile phone Bluetooth control.
Background
As is well known, a lithium battery is a type of battery using a nonaqueous electrolyte solution, with lithium metal or a lithium alloy as a negative electrode material. The lithium cell often can assemble a plurality of lithium cells in the use, forms lithium cell group, and current lithium cell group is only through protection shield output current and utilize lithium cell protection circuit to carry out work protection, consequently, as long as receive the power cord of group battery and just can discharge the use on the load, does not have its current output of intelligent control and stops.
Disclosure of Invention
In view of the above-mentioned deficiencies in the prior art, the present invention aims to provide a battery pack current output system based on bluetooth control of a mobile phone, which controls the voltage output of a lithium battery pack by combining an APP of the mobile phone with a bluetooth circuit, so that the battery pack is turned off during storage or transportation, thereby preventing a fire accident caused by an external circuit fault or other factors, and can be used only after a user activates the battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lithium battery pack current output system based on mobile phone Bluetooth control comprises a Bluetooth module, a single chip microcomputer, a power supply voltage stabilization detection circuit, a battery pack, a lithium battery protection circuit, a discharge detection control circuit and a load;
the utility model discloses a lithium battery protection circuit, including a battery pack, a bluetooth module, a single-chip microcomputer, a power supply voltage stabilization detection circuit, a discharge detection control circuit, a lithium battery protection circuit, a power supply voltage stabilization detection circuit, a load, a discharge current signal, a battery protection circuit, a battery.
Preferably, the power supply voltage stabilization detection circuit comprises a power supply voltage stabilization circuit and a voltage detection circuit, the voltage detection circuit is connected with the battery pack and feeds back a power supply signal of the battery pack to the single chip microcomputer and the load, the power supply voltage stabilization circuit is communicated with the voltage detection circuit, and the power supply voltage stabilization circuit is connected with a high voltage signal input by the battery pack and stabilizes the signal to 3.3V.
Preferably, the discharge detection control circuit comprises a discharge control circuit and a current detection circuit, the discharge control circuit is connected with the load and the lithium battery protection circuit and is connected with a signal input by the single chip microcomputer, and the current detection circuit is connected with the discharge control circuit, detects a current signal and feeds the current signal back to the single chip microcomputer.
Due to the adoption of the scheme, the invention is combined with a universal lithium battery protection circuit for use, the current output and the stop of the battery are specifically controlled, the output end of the discharge control circuit only has floating voltage when the battery is idle and standby, the current is very weak and cannot carry a load, the floating voltage is rapidly reduced when the load is switched on, the changed voltage is detected by the circuit and wakes up the system, the system can also be woken up in a charging mode, the system runs when power is on and locks the power output of the power voltage stabilizing circuit, the Bluetooth connection of a mobile phone is waited, if the Bluetooth control is not connected within a plurality of time, the power supply of the system is automatically cut off by a single chip; when the output is turned on in the Bluetooth connection operation of the mobile phone, the discharge detection control circuit is conducted to supply power to the load, the battery laying time can be set through the mobile phone, the laying time is the time when the load is not discharged, and the current is automatically turned off when the load current is not detected in the laying time.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a power supply voltage stabilization detection circuit according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a discharge detection control circuit according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a bluetooth module according to an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 4, the lithium battery pack current output system based on bluetooth control of a mobile phone according to the present embodiment includes a bluetooth module, a single chip, a power supply voltage stabilization detection circuit, a battery pack, a lithium battery protection circuit, a discharge detection control circuit, and a load;
the Bluetooth module is used for Bluetooth communication, inputs signals into the single chip microcomputer and receives signals fed back by the single chip microcomputer, the single chip microcomputer arranges the signals and feeds the signals back to the power supply voltage stabilization detection circuit and receives signals fed back by the discharge detection control circuit, the power supply voltage stabilization detection circuit carries out power supply voltage stabilization on the battery pack, detects voltage signals of the battery pack and feeds the signals back to the single chip microcomputer, the discharge detection control circuit controls current output of the battery pack to a load according to the signals fed back by the single chip microcomputer and feeds back discharge current signals to the single chip microcomputer, and the discharge detection control circuit is further connected with the lithium battery protection circuit.
The embodiment is combined with a universal lithium battery protection circuit for use, specifically realizes control of battery current output and stop, when the lithium battery protection circuit is idle and standby, the output end of a discharge control circuit only has floating voltage, the current is very weak and cannot carry a load, when the load is connected, the floating voltage is rapidly reduced, the changed voltage is detected by the circuit and wakes up the system, meanwhile, the system can be woken up in a charging mode (namely charging the lithium battery pack), then the system runs by obtaining the electricity and locks the power output of a power voltage stabilizing circuit, the Bluetooth connection of a mobile phone is waited, if the Bluetooth control is not connected within a plurality of time, a single chip can automatically cut off the power supply of the system, and the waste; when the Bluetooth of the mobile phone is connected and operated and the output is turned on, the discharge detection control circuit is conducted to supply power to the load, the battery laying time can be set through the mobile phone, the laying time is the time when the load is not discharged, and the current is automatically cut off when the load current is not detected in the laying time.
Specifically, the power supply voltage stabilization detection circuit of the present embodiment may adopt a circuit structure schematic diagram shown in fig. 2, that is, the power supply voltage stabilization detection circuit includes a power supply voltage stabilization circuit and a voltage detection circuit, the voltage detection circuit is connected to the battery pack and feeds back a voltage signal of the battery pack to the single chip microcomputer and the load, the power supply voltage stabilization circuit is communicated with the voltage detection circuit, the power supply voltage stabilization circuit is connected to a high voltage signal input by the battery pack and stabilizes the signal to 3.3V, a B + end in the circuit is connected to the battery pack, and a P16 end is connected to the single chip microcomputer.
The seventh capacitor C7, the fourth capacitor C4, the first capacitor C1, the second resistor R2, the third resistor R3, the seventh resistor R7, the first inductance coil L4, the third diode D3, the voltage stabilizing chip U1 and the second capacitor C2 form a power supply voltage stabilizing circuit, and the rest are voltage detection circuits, wherein the power supply voltage stabilizing circuit stabilizes the voltage input by the battery pack to 3.3V and utilizes the 3.3V to provide system functions. In the voltage detection circuit: the eighth resistor R8, the ninth resistor R9 and the tenth resistor R10 form a pre-charging function, and because the capacitor is arranged in the circuit, the small power switch tube is prevented from being burnt out by large current at the moment of power-on; the first switch tube Q1, the fourth resistor R4 and the third capacitor C3 form a delay power-on circuit, the base of the first switch tube Q1 is connected with the resistor R4 and grounded, so the first switch tube Q1 is turned on, but due to the existence of the third capacitor C3, when the power is just turned on, the third capacitor C3 is charged, so that the base potential of the first switch tube Q1 rises to be close to the potential of the emitter and is turned off, and the first switch tube Q1 is turned on along with the completion of the charging of the third capacitor C3, so the embodiment enters the normal power supply state. The fourth switch tube Q4, the eleventh resistor R11, the twelfth resistor R12, the fifth switch tube Q5, the switch KA1, the forty-fourth resistor R44 and the thirteenth resistor R13 form a switch circuit, when the switch circuit is connected to a power supply, the circuit is not conducted, when the switch KA1 is lightly pressed, the fourth switch tube Q4 is triggered to be conducted to supply power to the switch circuit, the single chip microcomputer is powered on to work, a high level is output to the base of the fifth switch tube Q5 through the thirteenth resistor R13 to enable the high level to be conducted, the fourth switch tube Q4 is continuously conducted due to the conduction of the fifth switch tube Q5, therefore, the power supply is locked, when the single chip microcomputer stops outputting the high level, the circuit is turned to be in a cut-off state, and then the zero power consumption standby of the single chip microcomputer and the Bluetooth module is achieved. In the circuit, a ninth capacitor C9, a first diode D1, a third switching tube Q3, a first resistor R1, a thirty-second resistor R32 and a thirty-third resistor R33 form a load trigger wake-up circuit, and form a charging trigger wake-up circuit with an eleventh switching tube Q11 and a thirty-eighth resistor R38, and the load trigger process is as follows: the current passes through the first diode D1 to charge the ninth capacitor C9, the negative pole of the ninth capacitor C9 is connected to the output terminal load connection terminal (i.e., "PC-" in fig. 3), and the ninth capacitor C9 is triggered by the discharge of the third switching tube Q3 when the load changes.
Specifically, the discharge detection control circuit of this embodiment is as shown in fig. 3, that is, includes a discharge control circuit and a current detection circuit, the discharge control circuit is connected to the load and the lithium battery protection circuit and is connected to a signal input by the single chip microcomputer, the current detection circuit is connected to the discharge control circuit and detects a current signal and feeds the current signal back to the single chip microcomputer, the current detection circuit is composed of an eighteenth resistor R18, a nineteenth resistor R19, a twenty-third resistor R23, a tenth capacitor C10, an amplifier U4-B, a twenty-first resistor R21, a twenty-second resistor R22, an amplifier U4-a, a twenty-sixth resistor R26, a twenty-fifth resistor R25, and a fourth diode D4, and the rest are the discharge control circuit.
Referring to fig. 2, since the MOS transistor Q38 in fig. 3 is in an off state, it should be noted that the PC-terminal of the circuit is connected to the load, the GV terminal and the CC terminal are connected to the lithium battery protection circuit, and the P20 and the P15 terminal are both connected to the single chip microcomputer. The impedance of the PC-terminal to the ground is large, when the PC-terminal is connected with a load, the potentials of B + and PC-become low, the voltage of the ninth capacitor C9 is prevented from being directly led out due to the action of the first diode D1, the ninth capacitor C9 forms a loop through the third switching tube Q3, the thirty-second resistor R32 and the B + end, at the moment, the third switching tube Q3 is conducted to release the level of the ninth capacitor C9, and the instantaneous level triggers the previous switching circuit through the first resistor R1. The process of charging triggering: when the MOS tube Q38 is in an off state, a charging loop enters the battery pack from the B + end to the ground wire, passes through the eighteenth resistor R38, enters the base and the emitter of the eleventh switch tube Q11 to the PC-end and then to the cathode of the charger, and at the moment, the eleventh switch tube Q11 is conducted to force the third switch tube Q3 to be conducted to trigger the switch circuit.
The eighteenth resistor and the nineteenth resistor of the current detection resistor of the lithium battery protection circuit are shared by discharge detection and charge detection in the embodiment, voltage drop voltage is generated by current passing through the resistors, voltage signals are amplified by twenty-third resistor R23, tenth capacitor C10, amplifier U4-B, twenty-first resistor R21 and twenty-second resistor R22 and then subjected to level comparison by amplifier U4-A, twenty-sixth resistor R26 and twenty-fifth resistor R25 to be converted into high and low levels to be sent to the single chip microcomputer, and the single chip microcomputer judges the state according to the level signals.
The acquisition and amplification of the charging signal are different from those described above, and during charging, the current is opposite to the discharging current direction, and the circuit needs to be reversely connected with the acquisition current signal, so that the ground wire of the amplifier U3-B is connected to the upper end of the sampling resistor, the "+" phase of the amplifier U3-B is connected to the ground wire through the sixth capacitor C6 and the seventeenth resistor R17, in the charging state, the upper ends of the ground wire relative to the eighteenth resistor R18 and the nineteenth resistor R19 of the sampling resistor are "+", the amplifier U3-B enters a normal working state, the amplified signal is converted into a high-low level signal by the comparator U3-a to be identified by the single chip microcomputer, and the other circuit is converted by the twenty-eighth resistor R28, the seventh switch Q7, the twenty-seventh resistor R27 and the twelfth switch Q12 to control the MOS transistor Q38 to be forcibly charged.
The lithium battery protection circuit of the embodiment is a conventional lithium battery protection circuit, the level of discharge control output by the lithium battery protection circuit is connected to a 'GV' point, a high-level MOS (metal oxide semiconductor) tube Q38 is switched on, the 'GV' point is connected with a twelfth switching tube Q12, a twenty-seventh resistor R27, a seventh switching tube Q7 and a forty-third resistor R43 in the circuit of the embodiment and is connected with a single chip microcomputer, when the single chip microcomputer outputs a high level, the seventh switching tube Q7 is switched on, and the twelfth switching tube Q12 is switched off, so that the high level of the 'GV' reaches the grid of the MOS tube Q38, and the MOS tube is switched on; when the singlechip outputs a low level, the seventh switch tube Q7 is cut off, and the twelfth switch tube Q12 is switched on, so that the MOS tube Q38 is cut off when the GV level becomes low.
In addition, in the present embodiment, information transmission is performed between the bluetooth module and the mobile phone APP, so a circuit structure diagram of the bluetooth module of the present embodiment is shown in fig. 4, in the drawing, U6 is the bluetooth module, and a sixth switching tube Q6, a thirty-fifth resistor R35, a thirty-sixth resistor R36, an eighth switching tube Q8, and a thirty-seventh resistor R37, which are connected to the bluetooth module, are power supply control of the bluetooth module, and when the single chip does not use bluetooth in some cases, the circuit can be used to turn off the power supply of the bluetooth, so as to reduce the loss of battery power; u5 is the singlechip, and LED1 is the operating condition pilot lamp, and forty-fifth resistance R45, forty-sixth resistance R46 are the sampling circuit of this circuit's voltage measurement.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. The utility model provides a lithium cell group current output system based on bluetooth of mobile phone control which characterized in that: the device comprises a Bluetooth module, a singlechip, a power supply voltage stabilization detection circuit, a battery pack, a lithium battery protection circuit, a discharge detection control circuit and a load;
the utility model discloses a lithium battery protection circuit, including a battery pack, a bluetooth module, a single-chip microcomputer, a power supply voltage stabilization detection circuit, a discharge detection control circuit, a lithium battery protection circuit, a power supply voltage stabilization detection circuit, a load, a discharge current signal, a battery protection circuit, a battery.
2. The lithium battery pack current output system based on the Bluetooth control of the mobile phone according to claim 1, wherein: the power supply voltage stabilization detection circuit comprises a power supply voltage stabilizing circuit and a voltage detection circuit, the voltage detection circuit is connected with the battery pack and feeds back a power supply signal of the battery pack to the single chip microcomputer and the load, the power supply voltage stabilizing circuit is communicated with the voltage detection circuit, and the power supply voltage stabilizing circuit is connected with a high voltage signal input by the battery pack and stabilizes the signal to 3.3V.
3. The lithium battery pack current output system based on the Bluetooth control of the mobile phone according to claim 2, wherein: the discharging detection control circuit comprises a discharging control circuit and a current detection circuit, the discharging control circuit is connected with the load and the lithium battery protection circuit and is connected with signals input by the single chip microcomputer, and the current detection circuit is connected with the discharging control circuit, detects current signals and feeds the current signals back to the single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910189873.4A CN111694391A (en) | 2019-03-13 | 2019-03-13 | Lithium battery pack current output system based on mobile phone Bluetooth control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910189873.4A CN111694391A (en) | 2019-03-13 | 2019-03-13 | Lithium battery pack current output system based on mobile phone Bluetooth control |
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| Publication Number | Publication Date |
|---|---|
| CN111694391A true CN111694391A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910189873.4A Pending CN111694391A (en) | 2019-03-13 | 2019-03-13 | Lithium battery pack current output system based on mobile phone Bluetooth control |
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| CN (1) | CN111694391A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113162178A (en) * | 2021-04-27 | 2021-07-23 | 深圳市阳邦兴业智能科技有限公司 | Detection protection and control system with charging function |
-
2019
- 2019-03-13 CN CN201910189873.4A patent/CN111694391A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113162178A (en) * | 2021-04-27 | 2021-07-23 | 深圳市阳邦兴业智能科技有限公司 | Detection protection and control system with charging function |
| CN113162178B (en) * | 2021-04-27 | 2024-05-24 | 深圳市阳邦兴业智能科技有限公司 | Detection protection and control system with charging function |
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