CN219554613U - Storage battery charging control circuit with reverse connection prevention protection - Google Patents
Storage battery charging control circuit with reverse connection prevention protection Download PDFInfo
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- CN219554613U CN219554613U CN202320041380.8U CN202320041380U CN219554613U CN 219554613 U CN219554613 U CN 219554613U CN 202320041380 U CN202320041380 U CN 202320041380U CN 219554613 U CN219554613 U CN 219554613U
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- 238000007600 charging Methods 0.000 title claims abstract description 47
- 230000002265 prevention Effects 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 38
- 102000006381 STAT1 Transcription Factor Human genes 0.000 claims description 3
- 108010044012 STAT1 Transcription Factor Proteins 0.000 claims description 3
- 102000004265 STAT2 Transcription Factor Human genes 0.000 claims description 3
- 108010081691 STAT2 Transcription Factor Proteins 0.000 claims description 3
- 230000005669 field effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a storage battery charging control circuit with reverse connection prevention protection, which is characterized by comprising a reverse connection prevention protection module and a charging control module, wherein the charging control module is connected with the reverse connection prevention protection module and is used for controlling charging of an external storage battery connected with the reverse connection prevention protection module, the reverse connection prevention protection module comprises a BAT+ access end and a BAT-access end which are connected with the battery, and a switching power supply of a light emitting diode LED1, a resistor R1, a PMOS tube Q1, a resistor R2, a resistor R3, a BOUT+ power supply end, a BOUT-power supply end and a pin to be enabled, so that when the BAT+ is connected with the positive electrode of the storage battery and has positive voltage, the switching power supply is enabled to be turned on, and the switching power supply is connected with the external power supply. The utility model can be reversely connected for protection, and can also carry out charging control of automatic charging, full automatic stopping and power shortage supplementary charging on the battery, the battery is not connected, and the charging circuit is in a low-power consumption state.
Description
Technical Field
The utility model relates to the technical field of charge control circuits, in particular to a storage battery charge control circuit with reverse connection prevention protection.
Background
The prior devices such as fire protection and the like need an external battery, and a standby battery is adopted in the past, and the external battery is usually connected directly, namely the power supply device is directly connected with the storage battery, and no technical measure for preventing reverse connection is adopted between the storage battery and the power supply device. The device that the battery inserts is the active component mostly, if the battery polarity is connected in opposite directions and is very easy to cause equipment damage, leads to equipment to be unable to use to the equipment does not have automatic charging function. Accordingly, a corresponding circuit having a reverse connection prevention protection function and capable of charge control is required.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a storage battery charging control circuit with reverse connection prevention protection, which can solve the problems described in the background art.
The technical scheme for realizing the purpose of the utility model is as follows: the storage battery charging control circuit with reverse connection preventing protection comprises a reverse connection preventing protection module and a charging control module, wherein the charging control module is connected with the reverse connection preventing protection module and used for controlling the charging of an external storage battery connected with the reverse connection preventing protection module,
the anti-reverse connection protection module comprises a BAT+ access end and a BAT-access end which are used for being connected with a battery, a light emitting diode LED1, a resistor R1, a PMOS tube Q1, a resistor R2, a resistor R3, a BOUT+ power supply end, a BOUT-power supply end and a switching power supply of a pin to be enabled, wherein one end of the resistor R1 is connected with the positive electrode of the light emitting diode LED1, the negative electrode of the light emitting diode LED1 is connected with the BAT+ access end, the other end of the resistor R1 is connected with the BAT-access end, the BAT+ access end is also connected with a source electrode of the PMOS tube Q1, a grid electrode of the PMOS tube Q1 is respectively connected with one end of the resistor R2 and the BOUT+ power supply end, a drain electrode of the PMOS tube Q1 is respectively connected with the other end of the resistor R3, the other end of the resistor R3 is respectively connected with the BAT-access end and the BOUT-power supply end, and is commonly grounded, the BOUT+ power supply end and the BOUT-power supply end are used for being connected with external power supply equipment, so that the BAT+ access end and the BAT-access end are connected with the storage battery through the anti-reverse connection protection module,
the BAT+ access terminal is also connected with an enabling pin of the switching power supply, so that when the BAT+ is accessed to the positive electrode of the storage battery and has positive voltage, the switching power supply is enabled to be turned on, and the switching power supply is connected with an external power supply.
Further, the charging control module comprises a power management chip U1 and a PMOS tube Q4, the drain electrode of the PMOS tube Q4 is respectively connected with the output end of a switch power supply, one end of a capacitor C1 and the power end of the power management chip U1, the other end of the capacitor C1 is grounded, the other pin of the switch power supply is grounded, the source electrode of the PMOS tube Q4 is respectively connected with one end of a resistor R11, one end of a resistor R12, one end of a resistor R13 and the drain electrode of the PMOS tube Q2, the grid electrode of the PMOS tube Q4 is respectively connected with the other end of the resistor R11 and one end of the resistor R4, the other end of the resistor R4 is connected with the dormant pin of the power management chip U1, the ISET2 pin of the power management chip U1 is connected with the resistor R6 in series and then grounded, the TTC pin is connected with the capacitor C4 in series and then grounded, the CELL pin is not connected with the resistor R4 in series and then grounded, the COMP pin is connected with the first parallel branch in series and then grounded, the first parallel branch comprises a resistor R8, a capacitor C5 and a capacitor C6 and a resistor C8 are connected with the resistor C6 in parallel, the M pin is connected with the sliding resistor and the VTR 1 in series and then grounded after being connected with the resistor in series with the THM pin is grounded,
the other end of the resistor R12 is connected with the STAT2 pin of the power management chip U1 after being connected with the positive electrode of the light emitting diode LED2 in series, the other end of the resistor R13 is connected with the STAT1 pin of the power management chip U1 after being connected with the positive electrode of the light emitting diode LED3 in series, the HDR pin of the power management chip U1 is connected with the grid electrode of the PMOS tube Q2, the LX pin is respectively connected with one end of the capacitor C2, the source electrode of the PMOS tube Q2, one end of the inductor L1 and one end of the PMOS tube Q3, the BOOT pin is respectively connected with the other end of the capacitor C2 and the negative electrode of the diode D2, the REGN pin is connected with the positive electrode of the diode D2, the grid electrode of the PMOS tube Q3 is connected with the LDR pin of the power management chip U1, the source electrode of the PMOS tube is connected with the GND pin of the power management chip U1 and is commonly grounded, the other end of the inductor L1 is respectively connected with one end of the resistor R5 and the SRP pin of the power management chip U1, the other end of the resistor R5 is respectively connected with one end of the SRN pin, the DISG pin and one end of the capacitor C3, the other end of the capacitor C3 is connected with the resistor C3, and the other end of the capacitor C3 is connected with the resistor C5 is connected with the anti-node of the anti-node Q module.
Further, the signal of the power management chip U1 is HB6296.
Further, a 36V positive voltage is also connected to the connection node of the capacitor C1 and the switching power supply.
The beneficial effects of the utility model are as follows: the utility model can carry out reverse connection protection on the external storage battery, achieves the aim of reverse connection prevention, can carry out charging control of automatic charging, full charge automatic stop and power shortage supplementary charging on the battery, and has the advantages of energy saving, environmental protection, simple whole circuit, easy maintenance and low cost when the battery is not connected.
Drawings
FIG. 1 is a schematic diagram of the circuit principle of the present utility model;
fig. 2 is a schematic circuit diagram of the charge control module.
Detailed Description
The utility model is further described with reference to the accompanying drawings and detailed description below:
as shown in fig. 1-2, a battery charging control circuit with anti-reverse connection protection comprises an anti-reverse connection protection module and a charging control module, wherein the anti-reverse connection protection module comprises a bat+ access end and a BAT-access end which are connected with a battery, a light emitting diode LED1, a resistor R1, a PMOS tube Q1, a resistor R2, a resistor R3, a bout+ power supply end, a BOUT-power supply end and a switching power supply of a pin to be enabled, one end of the resistor R1 is connected with the positive electrode of the light emitting diode LED1, the negative electrode of the light emitting diode LED1 is connected with the bat+ access end, the other end of the resistor R1 is connected with the BAT-access end, the bat+ access end is also connected with the source electrode of the PMOS tube Q1, the grid electrode of the PMOS tube Q1 is respectively connected with one end and the bout+ power supply end of the resistor R2, the drain electrode of the PMOS tube Q1 is respectively connected with the other end of the resistor R2, the other end of the resistor R3 is respectively connected with the BAT-access end and the BOUT-power supply end, and the common ground, and the other end of the resistor R3 is connected with the BAT-power supply end and the battery is connected with the battery charging control module through the anti-reverse connection protection module.
The BAT+ access terminal is also connected with an enable pin (EN pin in the figure) of the switching power supply, so that when the BAT+ is accessed to the positive electrode of the storage battery and has positive voltage, the switching power supply can be enabled to be turned on, and the switching power supply is connected with an external power supply, for example, the switching power supply is connected with the mains supply through three wires (L wire, N wire and G wire in the figure).
When the BAT+ access end is connected with the positive electrode of an external storage battery (for example, a +24V storage battery), and the BAT-access end is connected with the negative electrode of the external storage battery, the BAT+ access end is connected with the external storage battery, which means that the BAT+ access end is not reversely connected with the external storage battery but belongs to the normal access storage battery, a diode in the PMOS tube Q1 is conducted in the forward direction, the voltage is divided to a grid electrode of the PMOS tube Q1 through resistors R2 and R3, and when the source voltage of the grid electrode is larger than the opening voltage of the PMOS tube Q1, the PMOS tube Q1 is conducted to power supply equipment of a later stage; when the BAT+ access terminal is connected to the negative electrode of the storage battery and the BAT-access terminal is connected to the positive electrode of the storage battery, the diode in the PMOS tube Q1 is reversely cut off, and the gate-source voltage is equal to 0. The PMOS tube Q1 is cut off, and the circuit does not form a loop, so that no current flows through the load, namely no current flows through the power supply equipment, and the subsequent-stage circuit is further protected, so that the purpose of reverse connection prevention is achieved.
The charging control module comprises a power management chip U1 and a PMOS tube Q4, the signal of the power management chip U1 is HB6296, and a similar power management chip with sleep mode charging can be selected during actual use. The drain electrode of the PMOS tube Q4 is respectively connected with the output end of the switch power supply, one end of the capacitor C1 and the power supply end (VCC pin in the figure) of the power supply management chip U1, the other end of the capacitor C1 is grounded, and the other pin of the switch power supply is grounded. The connection node of the capacitor C1 and the switching power supply is also connected with a 36V positive voltage (+36V in the figure), the source electrode of the PMOS tube Q4 is respectively connected with one end of the resistor R11, one end of the resistor R12, one end of the resistor R13 and the drain electrode of the PMOS tube Q2, the grid electrode of the PMOS tube Q4 is respectively connected with the other end of the resistor R11 and one end of the resistor R4, and the other end of the resistor R4 is connected with the SLEEP pin (SLEEP pin in the figure) of the power management chip U1. The ISET2 pin of the power management chip U1 is connected with the resistor R6 in series and then is grounded, the TTC pin is connected with the capacitor C4 in series and then is grounded, the CELL pin is connected with the resistor R4 in series and then is grounded, the COMP pin is connected with the first parallel branch in series and then is grounded, the first parallel branch comprises a resistor R8, a capacitor C5 and a capacitor C6, the resistor R8 and the capacitor C6 are connected with the capacitor C5 in parallel after being connected in series, the THM pin is connected with the sliding resistor RT1 in series and then is grounded, and the VTRIM pin is connected with the resistor R10 in series and then is grounded.
The other end of the resistor R12 is connected with the anode of the light emitting diode LED2 in series and then is connected with the STAT2 pin of the power management chip U1, and the other end of the resistor R13 is connected with the anode of the light emitting diode LED3 in series and then is connected with the STAT1 pin of the power management chip U1. The HDR pin of power management chip U1 is connected with the grid of PMOS pipe Q2, and the LX pin is connected with one end of electric capacity C2, the source of PMOS pipe Q2, one end of inductance L1, the drain electrode of PMOS pipe Q3 respectively, and the BOOT pin is connected with the other end of electric capacity C2, the negative pole of diode D2 respectively, and REGN pin and diode D2's positive pole are connected, and the grid of PMOS pipe Q3 is connected with the LDR pin of power management chip U1, and the source of PMOS pipe is jointly grounded after being connected with the GND pin of power management chip U1. The other end of the inductor L1 is respectively connected with one end of a resistor R5 and an SRP pin of a power management chip U1, the other end of the resistor R5 is respectively connected with one end of an SRN pin, an DISG pin and a capacitor C3 of the power management chip U1, the other end of the capacitor C3 is grounded, and a connection node connected with the other end of the capacitor C3 and the resistor R5 is also connected with a grid electrode of a PMOS tube Q1 in the anti-reverse connection protection module, namely, one end connected with a BOUT+ power supply end of the PMOS tube Q1.
The power management chip U1 can charge the storage battery in three stages: pre-charge, constant Current (CC/Constant Current), constant voltage (CV/Constant voltage) processes, constant Current charging Current is determined by an external voltage dividing resistor, and Constant voltage charging voltage can be fine-tuned by the external resistor. The power management chip HB6296 integrates battery temperature detection, overvoltage and short-circuit protection, ensures the safe work of the charging chip, and the HB6296 integrates intelligent battery detection function and overtime error recovery function.
The power management chip U1 is powered by a 36V output direct current switch power supply with standby EN (enable) control.
When the standby batteries BAT+ and BAT-are connected into the circuit, the storage battery opens a standby enable EN pin of the switching power supply through a diode D1, and the switching power supply can work normally after being connected with the mains supply; when the standby battery (namely +24V storage battery in the figure) is not connected to the circuit, the storage battery turns off the standby enabling pin of the switching power supply, and the switching power supply enters an energy-saving mode after being connected to the mains supply.
And the PMOS field effect tube Q4, the resistors R4 and R11 and the 1 pin of the power management chip U1 form a charger sleep mode, when the voltage of the switching power supply is lower than the voltage of the storage battery, the 1 pin of the chip U1 detects that the voltage is lower than the voltage of the storage battery, the storage battery enters the sleep mode, and the discharge current of the standby battery is minimum.
The resistor R11, the resistor R12, the light emitting diode LED2 and the light emitting diode LED3 form a charging instruction, the light emitting diode LED2 is lightened, and the storage battery is in a charging state at the moment; the light emitting diode LED3 is on, and the battery is in a full state at this time, and both light emitting diodes are off, indicating that no charge is required or that no battery is required to be on line.
The field effect tube Q2, the field effect tube Q3 and the inductor L1 form a battery charging controller of the synchronous buck switch mode DC/DC voltage stabilizing circuit, and the battery charging controller is used for converting the input voltage of the power management chip U1 into a proper voltage to charge the storage battery. The built-in self-oscillation circuit generates a synchronous voltage reduction circuit composed of working frequency driving field effect transistors Q2 and Q3 and an energy storage inductor L1, a resistor R5 detects charging current, and when the voltage reaches the set current of a power management chip U1, the charging current enters a constant current area; the 9 pin SRN of the power management chip U1 detects the current charging voltage, and when the voltage of the storage battery reaches the highest charging voltage, the storage battery enters a constant voltage area; the 3 pins of the power management chip U1 and the resistor R6 set the cut-off charging current, and when the charging current is smaller than the cut-off current, the storage battery is fully charged to stop charging, and the circuits are combined into a circuit with an automatic charging/cut-off function.
The power management chip U1 comprises a 7 pin, a resistor R8, a capacitor C6 and a capacitor C5, wherein the 7 pin, the resistor R8, the capacitor C6 and the capacitor C5 form an oscillation circuit compensation pin for compensating the stable operation of the built-in oscillator, the resistor R7 is a precharge current setting pin, and the capacitor C4 is a charge time.
The utility model can carry out reverse connection protection on the external storage battery, achieves the aim of reverse connection prevention, can carry out charging control of automatic charging, full charge automatic stop and power shortage supplementary charging on the battery, and has the advantages of energy saving, environmental protection, simple whole circuit, easy maintenance and low cost when the battery is not connected.
The embodiment disclosed in the present specification is merely an illustration of one-sided features of the present utility model, and the protection scope of the present utility model is not limited to this embodiment, and any other functionally equivalent embodiment falls within the protection scope of the present utility model. Various other corresponding changes and modifications will occur to those skilled in the art from the foregoing description and the accompanying drawings, and all such changes and modifications are intended to be included within the scope of the present utility model as defined in the appended claims.
Claims (4)
1. The storage battery charging control circuit with the reverse connection preventing protection is characterized by comprising a reverse connection preventing protection module and a charging control module, wherein the charging control module is connected with the reverse connection preventing protection module and is used for controlling the charging of an external storage battery connected with the reverse connection preventing protection module,
the anti-reverse connection protection module comprises a BAT+ access end and a BAT-access end which are used for being connected with a battery, a light emitting diode LED1, a resistor R1, a PMOS tube Q1, a resistor R2, a resistor R3, a BOUT+ power supply end, a BOUT-power supply end and a switching power supply of a pin to be enabled, wherein one end of the resistor R1 is connected with the positive electrode of the light emitting diode LED1, the negative electrode of the light emitting diode LED1 is connected with the BAT+ access end, the other end of the resistor R1 is connected with the BAT-access end, the BAT+ access end is also connected with a source electrode of the PMOS tube Q1, a grid electrode of the PMOS tube Q1 is respectively connected with one end of the resistor R2 and the BOUT+ power supply end, a drain electrode of the PMOS tube Q1 is respectively connected with the other end of the resistor R3, the other end of the resistor R3 is respectively connected with the BAT-access end and the BOUT-power supply end, and is commonly grounded, the BOUT+ power supply end and the BOUT-power supply end are used for being connected with external power supply equipment, so that the BAT+ access end and the BAT-access end are connected with the storage battery through the anti-reverse connection protection module,
the BAT+ access terminal is also connected with an enabling pin of the switching power supply, so that when the BAT+ is accessed to the positive electrode of the storage battery and has positive voltage, the switching power supply is enabled to be turned on, and the switching power supply is connected with an external power supply.
2. The battery charging control circuit with reverse connection prevention protection according to claim 1, wherein the charging control module comprises a power management chip U1 and a PMOS tube Q4, the drain electrode of the PMOS tube Q4 is respectively connected with the output end of a switch power supply, one end of a capacitor C1 and the power supply end of the power management chip U1, the other end of the capacitor C1 is grounded, the other pin of the switch power supply is grounded, the source electrode of the PMOS tube Q4 is respectively connected with one end of a resistor R11, one end of a resistor R12, one end of a resistor R13 and the drain electrode of the PMOS tube Q2, the grid electrode of the PMOS tube Q4 is respectively connected with the other end of the resistor R11 and one end of the resistor R4, the other end of the resistor R4 is connected with the dormant pin of the power management chip U1, the ISET2 pin of the power management chip U1 is connected with the resistor R6 in series and then grounded, the TTC pin is connected with the capacitor C4 in series and then grounded, the CELL pin is connected with the ground, the ISET pin is connected with the resistor R4 in series and then grounded, the COMP pin is connected with the first leg in series and then grounded, the first parallel branch is composed of a resistor R8, the capacitor C5 and the capacitor C6 and the resistor C6 are respectively connected with the resistor R6 in series and then connected with the resistor R1 in parallel,
the other end of the resistor R12 is connected with the STAT2 pin of the power management chip U1 after being connected with the positive electrode of the light emitting diode LED2 in series, the other end of the resistor R13 is connected with the STAT1 pin of the power management chip U1 after being connected with the positive electrode of the light emitting diode LED3 in series, the HDR pin of the power management chip U1 is connected with the grid electrode of the PMOS tube Q2, the LX pin is respectively connected with one end of the capacitor C2, the source electrode of the PMOS tube Q2, one end of the inductor L1 and one end of the PMOS tube Q3, the BOOT pin is respectively connected with the other end of the capacitor C2 and the negative electrode of the diode D2, the REGN pin is connected with the positive electrode of the diode D2, the grid electrode of the PMOS tube Q3 is connected with the LDR pin of the power management chip U1, the source electrode of the PMOS tube is connected with the GND pin of the power management chip U1 and is commonly grounded, the other end of the inductor L1 is respectively connected with one end of the resistor R5 and the SRP pin of the power management chip U1, the other end of the resistor R5 is respectively connected with one end of the SRN pin, the DISG pin and one end of the capacitor C3, the other end of the capacitor C3 is connected with the resistor C3, and the other end of the capacitor C3 is connected with the resistor C5 is connected with the anti-node of the anti-node Q module.
3. The battery charge control circuit with reverse connection prevention protection according to claim 2, wherein the signal of the power management chip U1 is HB6296.
4. A battery charge control circuit with anti-reverse protection according to claim 2 or 3, wherein a 36V positive voltage is further connected to the connection node of the capacitor C1 and the switching power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320041380.8U CN219554613U (en) | 2023-01-03 | 2023-01-03 | Storage battery charging control circuit with reverse connection prevention protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320041380.8U CN219554613U (en) | 2023-01-03 | 2023-01-03 | Storage battery charging control circuit with reverse connection prevention protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219554613U true CN219554613U (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320041380.8U Active CN219554613U (en) | 2023-01-03 | 2023-01-03 | Storage battery charging control circuit with reverse connection prevention protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219554613U (en) |
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2023
- 2023-01-03 CN CN202320041380.8U patent/CN219554613U/en active Active
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