CN2476129Y

CN2476129Y - Multi-model charging device

Info

Publication number: CN2476129Y
Application number: CN 01209813
Authority: CN
Inventors: 陈成辉
Original assignee: Xiamen Kehua Hengsheng Co Ltd
Current assignee: Xiamen Kehua Hengsheng Co Ltd
Priority date: 2001-02-14
Filing date: 2001-02-14
Publication date: 2002-02-06
Anticipated expiration: 2011-02-14

Abstract

The utility model provides a novel multi-model charge device, a control loop part of which consists of a CPU with an inner data comparator and a timer, and a charge off-on part. When the charge of battery arrives at setting average charge voltage, the device can automatically produce a charge interval to make the battery eliminate the charge fatigue; when the float-charge of battery arrives at the presetting conditions and the charge of battery is completed, the device automatically goes into dormant state, till the excitation condition occurs. The utility model is in the dormant state for a long time, which is conductive to the maintenance of the charge device and battery, thereby improving the reliability of the charge device, reducing the alteration of battery and prolonging the life time of battery.

Description

Novel multi-mode charging device

The utility model relates to a kind of charging device, particularly relates to a kind of being applied on the uninterrupted power supply, the charging device that can charge to storage battery with different charge modes stage by stage.

Uninterrupted power supply is to be used for providing accurate, the stable uninterrupted supply power equipment that exchanges to AC load.Storage battery is the core component of uninterrupted power supply, and can direct relation whole uninterruptible power system stably provide uninterrupted power supply.Usually uninterrupted power supply all is equipped with the charging device that can detect battery tension automatically, and usually, the charging modes of its charging device is: three kinds of charging modes such as constant voltage, constant current or two-stage.The two-stage charging modes is meant that this adopts current constant mode charging at the charging initial stage, reaches to use the constant voltage mode instead behind the predetermined even charging voltage and charge.This method has effectively overcome constant voltage charging method, and the initial stage battery tension is low, charging current is big because of charging, and the storage battery that current charge excessively that easily causes and constant current charge mode easily caused because of the charging later stage is given vent to anger in a large number, influences the life of storage battery.But this charging modes still exists such defective, and after battery charge finished, charging device still was in the floating charge operating state, causes internal storage battery characteristic variation easily, and capacity diminishes, and the life-span reduces; Because of charging process does not stop, easily make storage battery produce charging fatigue in addition, reduce charging effect.

The purpose of this utility model is to provide a kind of novel multi-mode charging device.It has overcome the shortcoming of above-mentioned pattern, in charging process, can produce a charging interval, and it is tired to allow storage battery fully eliminate charging; In case finish to charge in batteries, just enter resting state automatically, occur up to shooting condition, thereby improve the reliability of charging device and the alteration of reduction storage battery, prolong the useful life of storage battery.

The purpose of this utility model is achieved in that this charging device comprises compositions such as charging major loop, current source PWM part, adjuster, test section, A/D conversion, draught fan control circuit and main control circuit.Main control circuit is turn-offed, is opened part and constitute by CPU and charging.There are data comparator and timer in the inside of described CPU, described shutoff/open part to form by turn-offing control and relay.

Because the utility model used the CPU that has internal data comparator and timer at main control circuit, and increased shutoff/open part.Like this in all filling process (constant current charge process), when the voltage of storage battery reach set point (be generally monomer voltage for+14.3V) time, will producing a charging interval, to allow storage battery eliminate charging tired; When storage battery floating charge (constant voltage charge process) was lower than the setting current value, charging device automatically shut down and enters resting state; When battery discharging when being lower than a certain voltage, charging device conducting again enters operating state.Because charging device is in resting state for a long time, helps the maintenance of charging device and storage battery, so can improve the reliability of charging device and the useful life of prolongation storage battery.

Fig. 1 is the utility model theory diagram;

Fig. 2 is the utility model schematic diagram;

Among the figure: 1 is the A/D conversion; 2 is CPU; 3 for turn-offing/open part;

4 for turn-offing control; 5 is relay; 6,7 is adjuster;

8 is toggle switch; 9 is draught fan control circuit; 10 is the test section

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further details:

As shown in Figure 1, 2, this charging device comprises compositions such as charging major loop, current source PWM part, test section 10, A/D conversion 1, draught fan control circuit 9 and main control circuit.Main control circuit is by CPU2 and shutoff/open part 3 to constitute.The inside of described CPU2 has data comparator and timer; Described shutoff/open part 3 to form by turn-offing control 4 and relay 5 is used for interrupting charging and excites main charge circuit work.This main control circuit also can have a toggle switch 8 in addition, and described toggle switch 8 is connected with the CPU2 internal timer by pin P3.0, P3.1, P3.2, the P3.3 of CPU2, is used to set blanking time and dormancy time.

The size timer that described CPU2 interior data comparator is used for relatively detecting voltage, detect electric current and detected temperatures and set point then is used to monitor the time that sets and whether completely reaches the user charging interval and dormancy time are set.CPU2 also is used in addition: the digital signal of the electric current of the relevant storage battery that (1) reception processing A/D conversion portion 1 is sent here, voltage, temperature is transferred to the internal data comparator and compares; (2) according to result relatively: 1. all detected values all are lower than set point, adjust the output level of pin P2.3, P2.4, P2.5, P2.6, P2.7, effect through adjuster 6 that links to each other with its pin P2.3, P2.4 and the adjuster 7 that links to each other with pin P2.5, P2.6, P2.7, change the level amount that influences MCU respective pins in the current source PWM part, thus the control charging process; 2. voltage reach set point (monomer voltage for+14.3V) time, give by pin P2.0, P2.1 output high level and to turn-off/to open part 3, internal timer begins the instrumentation charging interval time simultaneously; When 3. electric current reached predetermined value, to turn-offing/open part 3, internal timer began the instrumentation dormancy time simultaneously by pin P2.0, P2.1 output high level; When 4. voltage is lower than set point, turn-offed/opened part 3, excite the charging major loop to enter operating state by pin P2.0, P2.1 output low level.When 5. temperature reaches set point,, start draught fan control circuit 9 by pin P2.2 output high level.(3) receive the timing result that timer is passed back, full when the setting time limit, then turn-offed/opened part 3 by pin P2.0, P2.1 output low level, excite the charging major loop to enter operating state.

To receive setting time limit that timer transmits full or when receiving data comparator and feeding back the voltage of storage battery to be lower than set point as CPU2, CPU2 is given by pin P2.0, P2.1 output low level and turn-offs/open part 3, and wherein the low level of pin P2.1 excites relay 5 adhesives energising; The low level of pin P2.0 produces waveform by the MCU that turn-offs control 4 excitation current type pulse-width modulations part, makes the charging major loop enter operating state; Detect voltage, electric current and the ambient temperature numerical value of storage battery when test section 10 after, send A/D conversion portion 1 to through A/D conversion portion 1 pin A1, A2, A3 with analog signaling; After A/D conversion portion 1 converts it into digital signal, be sent to CPU2 by pin B1, B2, B3, B4, B5 and CPU2 pin P0.0, P0.1, P0.2, P0.3, P0.4 along data/address bus; CPU2 carries out numerical computations to received digital signal, result of calculation is by interior data comparator and set point contrast, when detected value is lower than set point, CPU2 adjusts the output level amount of pin P2.3, P2.4, P2.5, P2.6, P2.7, change the level amount that influences MCU in the current source PWM part by the adjuster 6 that links to each other with its pin P2.3, P2.4 with the adjuster 7 that links to each other with pin P2.5, P2.6, P2.7, the control charging process is pressed the constant current charging mode charging; When detect voltage reach set point be monomer voltage reach+during 14.3V, CPU 2 is given by its pin P2.0, P2.1 output high level and turn-offs, opens part 3, wherein the high level of pin P2.1 is used for block system relay 5; The high level of pin P2.0 is by the waveform of MCU in the shutoff control 4 cut-off current type pulse-width modulations part, thus the shutoff charging, and while CPU2 internal timer begins by setting-up time (as 15 minutes) timing.So just producing a charging interval allows storage battery eliminate charging fatigue.

When the setting interval full signal of time limit that internal timer transmits, CPU2 is given by pin P2.0, P2.1 output low level and turn-offs/open part 3, wherein the low level of pin P2.1 excites relay 5 adhesive energisings and the low level of pin P2.0 is by turn-offing that MCU generates waveform in the control 4 excitation current type pulse-width modulations part, makes the charging major loop enter the floating charge operating state.Detect voltage, electric current and the ambient temperature numerical value of storage battery when test section 10 after, send A/D conversion portion 1 to through A/D conversion portion 1 pin A1, A2, A3 with analog signaling; After A/D conversion portion 1 converts it into digital signal, be sent to CPU 2 by its pin B1, B2, B3, B4, B5 and CPU 2 pin P0.0, P0.1, P0.2, P0.3, P0.4 along data/address bus; 2 pairs of received digital signals of CPU are carried out numerical computations, result of calculation is by interior data comparator and set point contrast, reach when being higher than predetermined value when detecting current value, CPU 2 adjusts the output level amount of pin P2.3, P2.4, P2.5, P2.6, P2.7, change the level amount that influences MCU in the current source PWM part by the adjuster 6 that links to each other with its pin P2.3, P2.4 with the adjuster 7 that links to each other with pin P2.5, P2.6, P2.7, thereby the control charging process is pressed the charging of constant voltage charge pattern; Reach when detecting current value that to be lower than predetermined value be that the monomer current value is when being 500mA, CPU2 is given by its pin P2.0, P2.1 output high level and turn-offs/open part 3, wherein the high level of pin P2.1 be used for block system relay 5 and the high level of pin P2.0 by turn-offing the waveform of control 4 cut-off current type pulse-width modulations part MCU, thereby turn-off charging, the CPU2 internal timer also begins the time timing by 40-50 days simultaneously.Like this, charging device just enters resting state.

Claims

1. novel multi-mode charging device, it comprises charging major loop, current source PWM part, test section, A/D conversion, draught fan control circuit and the main control circuit that general charging device has, it is characterized in that: described main control circuit is to turn-off, open part (3) by CPU (2) and charging to constitute, the inside of described CPU (2) has data comparator and timer, and described charging is turn-offed, opened part (3) and forms by turn-offing control (4) and relay (5).

2. multi-mode charging device according to claim 1, it is characterized in that: described main control circuit has a toggle switch (8), and this toggle switch (8) is connected with CPU (2) internal timer by the pin (P3.0, P3.1, P3.2P3.3) of CPU (2).