CN203589779U - Solar storage battery charging-discharging controller - Google Patents

Solar storage battery charging-discharging controller Download PDF

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Publication number
CN203589779U
CN203589779U CN201320707268.XU CN201320707268U CN203589779U CN 203589779 U CN203589779 U CN 203589779U CN 201320707268 U CN201320707268 U CN 201320707268U CN 203589779 U CN203589779 U CN 203589779U
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China
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circuit
storage battery
power
voltage
resistance
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CN201320707268.XU
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Chinese (zh)
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李加念
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昆明理工大学
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Abstract

The utility model relates to a solar storage battery charging-discharging controller. The controller belongs to the technical field of solar application. The controller comprises a solar charging control circuit, a voltage detection circuit, a current detection circuit, a 3V voltage stabilizing circuit, a single-chip microcomputer, a self-recovery fuse and a power supply control circuit. The input end of the solar charging control circuit is connected with a solar panel, and the output end of the solar charging control circuit is connected with the storage battery. The input ends of the voltage detection circuit and the current detection circuit are connected with the storage battery. The output ends of the voltage detection circuit and the current detection circuit are connected with an ADC interface of the single-chip microcomputer. The input end of the 3V voltage stabilizing circuit is connected with the storage battery, and the output end of the 3V voltage stabilizing circuit is connected with the power supply end of the single-chip microcomputer. The input end of the power supply control circuit is connected with an I/O interface of the single-chip microcomputer, the output end of the power supply control circuit is connected with the power supply end of a load, and the power supply end of the power supply control circuit is connected with the self-recovery fuse. The other end of the fuse is connected with the storage battery. The controller is simple in structure, easy to implement, low in power dissipation, and high in solar utilization rate.

Description

A kind of solar storage battery charging-discharging controller

Technical field

The utility model relates to a kind of solar storage battery charging-discharging controller, belongs to application of solar.

Background technology

Energy-saving and emission-reduction, low-carbon (LC) life have become the problem that people pay close attention to, and solar energy, as a kind of emerging green energy resource, is just obtaining developing rapidly and applying.One of key technology of utilizing solar energy be exactly controller for solar to the Based Intelligent Control of accumulator cell charging and discharging and management, should utilize in maximum efficiency solar energy, avoid again affecting the useful life of storage battery.Due in photovoltaic system, charge power supply itself is not " infinite power " truly, but " power-limited " from photovoltaic array, exported, can not constant voltage export, can not constant current output, but change along with the variation of intensity of illumination and temperature, sometimes even can't export enough voltage and currents.Therefore, while utilizing photovoltaic array to charge in batteries, there is certain particularity, except selecting suitable charging method, also will consider to utilize how in maximum efficiency solar energy.At present, while utilizing solar energy to charge in batteries, the charging strategy that has all adopted sun MPPT maximum power point tracking to combine with intelligent charging method, but its control algolithm is comparatively complicated, the power consumption of controller itself is larger, and collected limited solar energy has a big chunk to be consumed by controller, is not suitable for low-power consumption application requirements, and under equal conditions increased the capacity of solar panel, thereby increased cost.

Summary of the invention

The technical problems to be solved in the utility model is: avoid weak point of the prior art and a kind of low cost, low-power consumption are provided, are easy to realize, and can high efficiency collect the solar storage battery charging-discharging controller of solar energy.

Technical solutions of the utility model are: a kind of solar storage battery charging-discharging controller, comprises solar charging electric control circuit, voltage detecting circuit, current detection circuit, 3V voltage stabilizing circuit, single-chip microcomputer, resettable fuse and power-supplying circuit, the input of described solar charging electric control circuit is connected with solar panel, its output is connected with storage battery, the input of described voltage detecting circuit and current detection circuit is connected with storage battery respectively, the output of voltage detecting circuit and current detection circuit is connected with the ADC interface of single-chip microcomputer respectively, the input of described 3V voltage stabilizing circuit is connected with storage battery, its output is connected with the power end of single-chip microcomputer, the input of described power-supplying circuit is connected with the I/O interface of single-chip microcomputer, its output is connected with the power end of load, the power end of power-supplying circuit is connected with resettable fuse, the other end of resettable fuse is connected with battery positive voltage.

The model of described single-chip microcomputer can be MSP430F2132, and NM other ports of single-chip microcomputer are conventional connected mode.

As shown in Figure 2, described solar charging electric control circuit comprises integrated circuit BQ24650 and peripheral resistance, electric capacity, inductance and metal-oxide-semiconductor etc.; Wherein, BQ24650 is one, and to be specifically designed to solar energy be charge in batteries and the synchronous exchange pattern charge controller with MPPT maximum power point tracking, is applicable to the solar panel of 5 ~ 28 V.BQ24650 comprises precharge, constant current charge and 3 stages of constant voltage charge to the charge cycle of battery, and the time of precharge is fixed as 30min, and pre-charge current is fast charging current 1/10; When the 1/10 time charging of charging current lower than fast charging current stops automatically; When interior door limit value that battery tension is set lower than BQ24650, autoboot charge cycle; When the output voltage of solar panel drops to battery tension when following, BQ24650 enters the park mode of low quiescent current (being less than 15 μ A) automatically.

Resistance R 1 in Fig. 2, capacitor C 1, diode D3, resistance R 8 and capacitor C 2 form the input power circuit of BQ24650, for the output voltage of solar panel being converted to the input power of BQ24650.Wherein, resistance R 1 and capacitor C 1 forms a RC filter network, the moment vibration when suppressing solar panel hot plug; The damage of diode D3 for preventing that reverse voltage from causing while being added in VCC end; Resistance R 8 and capacitor C 2 form another RC filter network, for eliminating the ripple of solar panel output voltage.Metal-oxide-semiconductor Q1, Q2, resistance R 9, inductance L 1 and capacitor C 6 ~ C9 form a synchronous buck formula DC/DC voltage stabilizing circuit, for converting the input voltage of BQ24650 to suitable voltage to charge in batteries.

BQ24650 adopts constant voltage operation method to carry out the maximum power point of tracking solar cell panel, when the power output of solar panel declines because light intensity dies down, it is constant that BQ24650 maintains charging voltage by automatic reduction charging current, thereby keep solar panel to be operated in maximum power point.When the voltage of the MPPSET of BQ24650 pin is during lower than 1.2 V, automatically reduce charging current, if solar panel can not provide enough power stages really, charging current can be reduced to 0.The maximum power point voltage of solar panel can arrange by resistance R 6 and R7, maximum power point voltage be 1.2 * (1+R6/R7).

Charging voltage when BQ24650 carries out constant voltage charge or floating charge arranges by resistance R 10, R11, R14 and metal-oxide-semiconductor Q3: when carrying out constant voltage charge, the STAT2 pin of BQ24650 output high level makes metal-oxide-semiconductor Q3 conducting; When carrying out floating charge, the STAT2 pin output low level of BQ24650 makes metal-oxide-semiconductor Q3 cut-off.Electric current when BQ24650 carries out constant current charge is determined (voltage between SRP pin and SRN pin is 40 mV) by the SRP pin and the resistance R between SRN pin 9 that are connected to BQ24650, and electric current pre-charge current can also be set and stop charging by resistance R 9 time, its value is 0.1 times of constant current charge electric current.

As shown in Figure 3, described current detection circuit comprises flash current detection IC INA169 and peripheral Resistor-Capacitor Unit R15, R16, C12, C13; Wherein, R15 is a precision resister that resistance is 20 m Ω, it is connected on, and in the discharge loop of storage battery, (V+ end is connected with battery positive voltage, V-end is connected with discharge loop), discharging current for detection of storage battery, the discharge loop of storage battery is to using storage battery as power supply, after access load, and formed circuit loop when storage battery powers to the load; The differential input end of INA169 is the two ends of contact resistance R15 respectively, the current conversion that is used for resistance R 15 to detect is voltage, and the gain of INA169 is set by resistance R 16, after the voltage after conversion is amplified, through Sout end, export the ADC interface of described single-chip microcomputer to.Described current detection circuit, for detection of the discharging current in battery discharging process, when discharging current surpasses certain threshold value, cuts off discharge loop by power-supplying circuit described in described Single-chip Controlling, thereby storage battery is carried out to overcurrent discharge prevention.

As shown in Figure 4, described voltage detecting circuit comprises resistance R 31 and R32, capacitor C 31 and voltage stabilizing didoe D6.Wherein, one end of R31 is connected with battery positive voltage, the other end of R31 is connected with R32, the other end of R32 is connected with battery terminal negative, make R31 and R32 form a resistor voltage divider circuit, and the voltage of usining on R32 holds the ADC interface of delivering to described single-chip microcomputer by Batt_ADC as testing result, described single-chip microcomputer calculates the terminal voltage of storage battery according to the resistance ratio of two divider resistance R31, R32; For reducing the electric weight of resistor voltage divider circuit battery consumption, the resistance of R31 and R32 should improve as much as possible; Capacitor C 31 is parallel to the two ends of resistance R 32, for the ripple of the upper voltage of filtering R32, thereby improve described single-chip microcomputer, R32 is powered on and compresses into the precision that row ADC detects; D6 is a 2.5V voltage stabilizing didoe, is parallel to the two ends of resistance R 32, when the branch pressure voltage on R32 surpasses 2.5V, it is clamped at 2.5V, thereby avoids damaging because R32 branch pressure voltage is too high described Chip Microcomputer A/D C interface.Described voltage detecting circuit is for detection of the terminal voltage of the storage battery in battery discharging process; because accumulator voltage declines relatively slowly; for reducing the consumption of voltage detecting circuit to storage battery energy; described single-chip microcomputer was at interval of 10 minutes; control described voltage detecting circuit the terminal voltage of storage battery is carried out to one-time detection; when the terminal voltage of storage battery is during lower than its final discharging voltage; by power-supplying circuit described in described Single-chip Controlling, cut off discharge loop; avoid storage battery to continue electric discharge, thereby storage battery is carried out to under-voltage protection.

As shown in Figure 5, described 3V voltage stabilizing circuit comprises the linear voltage stabilization integrated circuit TLV70430 of a 3V and peripheral capacitor C 32 thereof, C33, the input of TLV70430 is connected with battery positive voltage, the output of TLV70430 is connected with the power end of described single-chip microcomputer, for being that 3V is the power supply of described single-chip microcomputer by the voltage transitions of storage battery; Capacitor C 32, C33 are parallel to respectively input and the output of TLV70430, for filter out power ripple.

As shown in Figure 6, described power-supplying circuit comprises two metal-oxide-semiconductor Q7, Q12 and resistance R 17, R18, R19; Wherein, Q7 is a high-power P channel MOS tube, and its maximum On current is 50 A, and Q12 is a low power N-channel MOS pipe; The source electrode of Q7 is connected with one end of resettable fuse, be that Vin is connected with one end of resettable fuse, the drain electrode of Q7 is connected with the power end of load, be that Vout is connected with the power end of load, the grid of Q7 is connected with the drain electrode of Q12, the source ground of Q12, and the grid of Q12 is connected with resistance R 18, the other end of resistance R 18 is connected with the I/O mouth of described single-chip microcomputer, and MCU_IO is connected with the I/O mouth of described single-chip microcomputer; The two ends of resistance R 17 are connected with grid, the source electrode of Q12 respectively, for the bias voltage of Q12 grid is set; The two ends of resistance R 19 are connected with grid, the drain electrode of Q7 respectively, for the bias voltage of Q7 grid is set; Resistance R 18 is connected between described single-chip processor i/o mouth and Q12 grid, for limiting the electric current of this branch road; When described Single-chip Controlling MCU_IO output high level, Q12 conducting, thereby Q7 conducting, the loop that connection storage battery is load supplying; When described Single-chip Controlling MCU_IO output low level, Q12 cut-off, thereby Q7 cut-off, the loop that cut-out storage battery is load supplying, stopping storage battery is load supplying.

The beneficial effects of the utility model are: this charging-discharging controller is simple in structure, be easy to realize, and controller itself is low in energy consumption, can make solar panel be operated in maximum power point in charging process, high to the utilance of solar energy.

Accompanying drawing explanation

Fig. 1 is the composition frame chart of the utility model controller;

Fig. 2 is the utility model solar charging electric control circuit figure;

Fig. 3 is the current detection circuit figure of the utility model controller;

Fig. 4 is the voltage detecting circuit figure of the utility model controller;

Fig. 5 is the 3V voltage stabilizing circuit figure of the utility model controller;

Fig. 6 is the power-supplying circuit figure of the utility model controller.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Embodiment 1: as shown in Fig. 1-6, a kind of solar storage battery charging-discharging controller, comprises solar charging electric control circuit, voltage detecting circuit, current detection circuit, 3V voltage stabilizing circuit, single-chip microcomputer, resettable fuse and power-supplying circuit, the input of described solar charging electric control circuit is connected with solar panel, its output is connected with storage battery, the input of described voltage detecting circuit and current detection circuit is connected with storage battery respectively, the output of voltage detecting circuit and current detection circuit is connected with the ADC interface of single-chip microcomputer respectively, the input of described 3V voltage stabilizing circuit is connected with storage battery, its output is connected with the power end of single-chip microcomputer, the input of described power-supplying circuit is connected with the I/O interface of single-chip microcomputer, its output is connected with the power end of load, the power end of power-supplying circuit is connected with resettable fuse, the other end of resettable fuse is connected with battery positive voltage.

Embodiment 2: as shown in Fig. 1-6, a kind of solar storage battery charging-discharging controller, comprises solar charging electric control circuit, voltage detecting circuit, current detection circuit, 3V voltage stabilizing circuit, single-chip microcomputer, resettable fuse and power-supplying circuit, the input of described solar charging electric control circuit is connected with solar panel, its output is connected with storage battery, the input of described voltage detecting circuit and current detection circuit is connected with storage battery respectively, the output of voltage detecting circuit and current detection circuit is connected with the ADC interface of single-chip microcomputer respectively, the input of described 3V voltage stabilizing circuit is connected with storage battery, its output is connected with the power end of single-chip microcomputer, the input of described power-supplying circuit is connected with the I/O interface of single-chip microcomputer, its output is connected with the power end of load, the power end of power-supplying circuit is connected with resettable fuse, the other end of resettable fuse is connected with battery positive voltage.

Described solar charging electric control circuit comprises integrated circuit BQ24650 and peripheral resistance, electric capacity, inductance and metal-oxide-semiconductor.

Described current detection circuit comprises flash current detection IC INA169, resistance R 15, R16, capacitor C 12, C13, resistance R 15 is connected in the discharge loop of storage battery, V+ end is connected with battery positive voltage, V-end is connected with discharge loop, the differential input end of flash current detection IC INA169 is the two ends of contact resistance R15 respectively, and Sout end exports the ADC interface of single-chip microcomputer to.

Described voltage detecting circuit comprises resistance R 31, R32, capacitor C 31 and voltage stabilizing didoe D6, one end of resistance R 31 is connected with battery positive voltage, the other end of resistance R 31 is connected with resistance R 32, the other end of resistance R 32 is connected with battery terminal negative, and capacitor C 31, voltage stabilizing didoe D6 are parallel to the two ends of resistance R 32.

Described 3V voltage stabilizing circuit comprises the linear voltage stabilization integrated circuit TLV70430 of a 3V and peripheral capacitor C 32 thereof, C33, the input of TLV70430 is connected with battery positive voltage, its output is connected with the power end of described single-chip microcomputer, and capacitor C 32, C33 are parallel to respectively input and the output of TLV70430.

Described power-supplying circuit comprises a high-power P channel MOS tube Q7 and a low power N-channel MOS pipe Q12, the drain electrode of P channel MOS tube Q7 is connected with battery positive voltage, the source electrode of P channel MOS tube Q7 is connected with the power end of load, the grid of P channel MOS tube Q7 is connected with the drain electrode of N-channel MOS pipe Q12, the source ground of N-channel MOS pipe Q12, the grid of N-channel MOS pipe Q12 is connected with the I/O mouth of described single-chip microcomputer by resistance R 18.

By reference to the accompanying drawings specific embodiment of the utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make various variations.

Claims (6)

1. a solar storage battery charging-discharging controller, is characterized in that: comprise solar charging electric control circuit, voltage detecting circuit, current detection circuit, 3V voltage stabilizing circuit, single-chip microcomputer, resettable fuse and power-supplying circuit, the input of described solar charging electric control circuit is connected with solar panel, its output is connected with storage battery, the input of described voltage detecting circuit and current detection circuit is connected with storage battery respectively, the output of voltage detecting circuit and current detection circuit is connected with the ADC interface of single-chip microcomputer respectively, the input of described 3V voltage stabilizing circuit is connected with storage battery, its output is connected with the power end of single-chip microcomputer, the input of described power-supplying circuit is connected with the I/O interface of single-chip microcomputer, its output is connected with the power end of load, the power end of power-supplying circuit is connected with resettable fuse, the other end of resettable fuse is connected with battery positive voltage.
2. solar storage battery charging-discharging controller according to claim 1, is characterized in that: described solar charging electric control circuit comprises integrated circuit BQ24650 and peripheral resistance, electric capacity, inductance and metal-oxide-semiconductor.
3. solar storage battery charging-discharging controller according to claim 1, it is characterized in that: described current detection circuit comprises flash current detection IC INA169, resistance (R15, R16), electric capacity (C12, C13), resistance (R15) is connected in the discharge loop of storage battery, V+ end is connected with battery positive voltage, V-end is connected with discharge loop, the differential input end of flash current detection IC INA169 is the two ends of contact resistance (R15) respectively, and Sout end exports the ADC interface of single-chip microcomputer to.
4. solar storage battery charging-discharging controller according to claim 1, it is characterized in that: described voltage detecting circuit comprises resistance (R31, R32), electric capacity (C31) and voltage stabilizing didoe (D6), one end of resistance (R31) is connected with battery positive voltage, the other end of resistance (R31) is connected with resistance (R32), the other end of resistance (R32) is connected with battery terminal negative, and electric capacity (C31), voltage stabilizing didoe (D6) are parallel to the two ends of resistance (R32).
5. solar storage battery charging-discharging controller according to claim 1, it is characterized in that: described 3V voltage stabilizing circuit comprises linear voltage stabilization integrated circuit TLV70430 and the peripheral electric capacity (C32, C33) thereof of a 3V, the input of TLV70430 is connected with battery positive voltage, its output is connected with the power end of described single-chip microcomputer, and electric capacity (C32, C33) is parallel to respectively input and the output of TLV70430.
6. solar storage battery charging-discharging controller according to claim 1, it is characterized in that: described power-supplying circuit comprises a high-power P channel MOS tube (Q7) and a low power N-channel MOS pipe (Q12), the drain electrode of P channel MOS tube (Q7) is connected with battery positive voltage, the source electrode of P channel MOS tube (Q7) is connected with the power end of load, the grid of P channel MOS tube (Q7) is connected with the drain electrode of N-channel MOS pipe (Q12), the source ground of N-channel MOS pipe (Q12), the grid of N-channel MOS pipe (Q12) is connected with the I/O mouth of described single-chip microcomputer by resistance (R18).
CN201320707268.XU 2013-11-11 2013-11-11 Solar storage battery charging-discharging controller CN203589779U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319849A (en) * 2014-11-06 2015-01-28 重庆希诺达通信有限公司 Solar battery charging controller and charging control method
CN105629830A (en) * 2015-12-22 2016-06-01 深圳市智行畅联科技有限公司 Power management method for interconnected automobile electronic device
CN106020327A (en) * 2016-07-15 2016-10-12 厦门华泉智慧能源科技有限公司 MPPT adjusting circuit and adjusting method
CN106058999A (en) * 2016-07-11 2016-10-26 单专年 Precise set power source voltage control device
CN108414948A (en) * 2018-02-08 2018-08-17 深圳高科新农技术有限公司 A kind of power supply monitoring system and unmanned plane for unmanned plane
WO2018218972A1 (en) * 2017-06-01 2018-12-06 深圳源创智能照明有限公司 Solar power supply system and charging and discharging detection and regulating circuit thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104319849A (en) * 2014-11-06 2015-01-28 重庆希诺达通信有限公司 Solar battery charging controller and charging control method
CN105629830A (en) * 2015-12-22 2016-06-01 深圳市智行畅联科技有限公司 Power management method for interconnected automobile electronic device
CN106058999A (en) * 2016-07-11 2016-10-26 单专年 Precise set power source voltage control device
CN106020327A (en) * 2016-07-15 2016-10-12 厦门华泉智慧能源科技有限公司 MPPT adjusting circuit and adjusting method
WO2018218972A1 (en) * 2017-06-01 2018-12-06 深圳源创智能照明有限公司 Solar power supply system and charging and discharging detection and regulating circuit thereof
CN108414948A (en) * 2018-02-08 2018-08-17 深圳高科新农技术有限公司 A kind of power supply monitoring system and unmanned plane for unmanned plane

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Granted publication date: 20140507

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