CN203339674U - Voltage protecting circuit used for single lead acid battery - Google Patents
Voltage protecting circuit used for single lead acid battery Download PDFInfo
- Publication number
- CN203339674U CN203339674U CN2013203936315U CN201320393631U CN203339674U CN 203339674 U CN203339674 U CN 203339674U CN 2013203936315 U CN2013203936315 U CN 2013203936315U CN 201320393631 U CN201320393631 U CN 201320393631U CN 203339674 U CN203339674 U CN 203339674U
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- voltage
- battery
- circuit
- optocoupler components
- lead acid
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Abstract
The utility model discloses a voltage protecting circuit used for a single lead acid battery and relates to the technical field of battery protection. The voltage protecting circuit is composed of four photoelectric coupling elements, an overvoltage detecting circuit and an undervoltage detecting circuit. When charging the battery, power voltage of a power source enables the first photoelectric coupling element to switch on and the overvoltage detecting circuit is closed. When battery charging voltage is higher than a predetermined value, current in the circuit drives the second photoelectric coupling element to switch on and the circuit in linkage is disconnected with the charging power source. When using the battery, voltage across a load enables the third photoelectric coupling element to switch on and the undervoltage detecting circuit is closed. After the battery voltage decreases to the predetermined value, current in the circuit is reduced to a too low magnitude to maintain the conduction of the fourth photoelectric coupling element and the circuit in the linkage gives out alarms or cuts off load current. The voltage protecting circuit used for the single lithium battery has advantages that the voltage protecting circuit used for the single lead acid battery is put to work only during a battery charging process or a battery using process and does not work during a standby process of the battery, so that no monitoring circuit current is supplied and no electric energy consumption is produced.
Description
Technical field
The utility model relates to the battery protection technical field, specifically a kind of monomer lead acid storage battery voltage protection electricity
Road, the monomer lead acid storage battery voltage protection circuit especially only just dropped into when charging and use.
Background technology
Common battery pack does not arrange the monomer battery voltage protective circuit.Even there is the protection of this respect also mostly to adopt the method for fixing access.No matter battery is all being worked in what state (charging, stand-by, use) protection.Although it is little that protective circuit consumes electric energy, if the battery long period in dormant state, power consumption should not ignored the damage of battery.Some power tool batteries particularly, the circuit negative interaction of this long-term participation follow-up work clearly.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; the utility model provides a kind of monomer lead acid storage battery voltage protection circuit, only when battery charge and during use, just drops into, and does not participate in work during battery is stand-by; do not supply with the observation circuit electric current, do not produce power consumption.
The utility model is realized with following technical scheme: a kind of monomer lead acid storage battery voltage protection circuit, and the two ends of lead acid accumulator are parallel with respectively charge protector and load protection circuit; Described charge protector comprises the first optocoupler components, the second optocoupler components and for detection of the overvoltage detection circuit of lead acid storage battery cell voltage; The output of the first optocoupler components connects after the input of the second optocoupler components the two ends that are connected in parallel on battery by overvoltage detection circuit, charging voltage makes the first optocoupler components open-minded, and the output of the second optocoupler components is for driving the shutoff charging current;
Described load protection circuit comprises the 3rd optocoupler components, the 4th optocoupler components and for detection of the Undervoltage detection circuit of lead acid storage battery cell voltage; The output of the 3rd optocoupler components connects after the input of the 4th optocoupler components the two ends that are connected in parallel on battery by Undervoltage detection circuit, voltage in load makes the 3rd optocoupler components open-minded, and the output of the 4th optocoupler components is for driving the switching off load electric current.
It is further: described overvoltage detection circuit and Undervoltage detection circuit all adopt the reference voltage adjustable voltage stabilizer, the negative electrode of reference voltage adjustable voltage stabilizer and with reference to being parallel with resistance between the utmost point, anode and with reference to being parallel with adjustable resistance between the utmost point; The negative electrode of reference voltage adjustable voltage stabilizer is connected with the output of the first optocoupler components, and anode is connected with the input of the second optocoupler components.
The beneficial effects of the utility model are: circuit only when battery charge, automatically follow voltage while using and drop into, do not consume the beneficial effect of electric energy during having battery stand-by, avoid battery to be in long-time low discharging current dormant state, the useful life of prolongation battery.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated
Fig. 1 is the utility model theory structure block diagram;
Fig. 2 is the utility model circuit diagram.
Embodiment
As shown in Figure 1, a kind of monomer lead acid storage battery voltage protection circuit is to be parallel with respectively charge protector and load protection circuit at the two ends of lead acid accumulator; Described charge protector comprises the first optocoupler components, the second optocoupler components and for detection of the overvoltage detection circuit of lead acid storage battery cell voltage; The output of the first optocoupler components connects after the input of the second optocoupler components the two ends that are connected in parallel on battery by overvoltage detection circuit, charging voltage makes the first optocoupler components open-minded, and the output of the second optocoupler components is for driving the shutoff charging current;
Described load protection circuit comprises the 3rd optocoupler components, the 4th optocoupler components and for detection of the Undervoltage detection circuit of lead acid storage battery cell voltage; The output of the 3rd optocoupler components connects after the input of the 4th optocoupler components the two ends that are connected in parallel on battery by Undervoltage detection circuit, voltage in load makes the 3rd optocoupler components open-minded, and the output of the 4th optocoupler components is for driving the switching off load electric current;
Follow charging voltage during the battery charging, drop into overvoltage detection circuit; Follow load voltage when battery is used and drop into Undervoltage detection circuit.
During the battery charging, supply voltage makes the first optocoupler components conducting, opens overvoltage detection circuit, and when battery charging voltage arrives set point greatly, current drives the second optocoupler components conducting linkage circuit in circuit disconnects charge power supply.
When battery is used, voltage in load makes the 3rd optocoupler components conducting, open Undervoltage detection circuit, when cell voltage reduces to set point, the electric current in circuit is reduced to and can not maintains the 4th optocoupler components conducting linkage circuit and provide and report to the police or the switching off load electric current.
As shown in Figure 2, overvoltage detection circuit and Undervoltage detection circuit all adopt the reference voltage adjustable voltage stabilizer, the negative electrode of reference voltage adjustable voltage stabilizer and with reference to being parallel with resistance between the utmost point, anode and with reference to being parallel with adjustable resistance between the utmost point; The negative electrode of reference voltage adjustable voltage stabilizer is connected with the output of the first optocoupler components, and anode is connected with the input of the second optocoupler components.
Wherein, four optocoupler components all adopt the PC817 photoelectrical coupler, and the reference voltage adjustable voltage stabilizer adopts TL431 reference voltage adjustable voltage stabilizer, and adjustable resistance PR1 is 0.5 watt of 470 kilohms of multiturn potentiometer, or 0.5 watt of 430 kilohms of metal film resistor.Resistance R 1 is 0.5 watt of 100 ohmic resistor.Resistance R 2 is 0.5 watt of 470 ohmic resistor.Resistance R 3 is 0.5 watt of 100 kilohms of metal film resistor.Adjustable resistance PR2 is 0.5 watt of 470 kilohms of multiturn potentiometer or available 0.5 watt of 240 kilohms of metal film resistor.Resistance R 4 is 0.5 watt of 82 kilohms of metal film resistor.Battery E is that 12 musculus rectus femoris are safeguarded lead acid accumulator.
Claims (2)
1. a monomer lead acid storage battery voltage protection circuit, it is characterized in that: the two ends of lead acid accumulator are parallel with respectively charge protector and load protection circuit; Described charge protector comprises the first optocoupler components, the second optocoupler components and for detection of the overvoltage detection circuit of lead acid storage battery cell voltage; The output of the first optocoupler components connects after the input of the second optocoupler components the two ends that are connected in parallel on battery by overvoltage detection circuit, charging voltage makes the first optocoupler components open-minded, and the output of the second optocoupler components is for driving the shutoff charging current;
Described load protection circuit comprises the 3rd optocoupler components, the 4th optocoupler components and for detection of the Undervoltage detection circuit of lead acid storage battery cell voltage; The output of the 3rd optocoupler components connects after the input of the 4th optocoupler components the two ends that are connected in parallel on battery by Undervoltage detection circuit, voltage in load makes the 3rd optocoupler components open-minded, and the output of the 4th optocoupler components is for driving the switching off load electric current.
2. a kind of monomer lead acid storage battery voltage protection circuit according to claim 1, it is characterized in that: described overvoltage detection circuit and Undervoltage detection circuit all adopt the reference voltage adjustable voltage stabilizer, the negative electrode of reference voltage adjustable voltage stabilizer and with reference to being parallel with resistance between the utmost point, anode and with reference to being parallel with adjustable resistance between the utmost point; The negative electrode of reference voltage adjustable voltage stabilizer is connected with the output of the first optocoupler components, and anode is connected with the input of the second optocoupler components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203936315U CN203339674U (en) | 2013-07-04 | 2013-07-04 | Voltage protecting circuit used for single lead acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203936315U CN203339674U (en) | 2013-07-04 | 2013-07-04 | Voltage protecting circuit used for single lead acid battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339674U true CN203339674U (en) | 2013-12-11 |
Family
ID=49708330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203936315U Expired - Lifetime CN203339674U (en) | 2013-07-04 | 2013-07-04 | Voltage protecting circuit used for single lead acid battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203339674U (en) |
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2013
- 2013-07-04 CN CN2013203936315U patent/CN203339674U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |