CN203761034U - Over discharge protection device for storage battery - Google Patents
Over discharge protection device for storage battery Download PDFInfo
- Publication number
- CN203761034U CN203761034U CN201420146005.0U CN201420146005U CN203761034U CN 203761034 U CN203761034 U CN 203761034U CN 201420146005 U CN201420146005 U CN 201420146005U CN 203761034 U CN203761034 U CN 203761034U
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- China
- Prior art keywords
- storage battery
- relay
- triode
- protection device
- voltage
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Protection Of Static Devices (AREA)
Abstract
The utility model discloses an over discharge protection device for a storage battery. The over discharge protection device comprises the storage battery B and a load port P1, and a voltage detection circuit is connected between the storage battery B and the load port P1 and comprises a starting switch K, a relay J, a triode Q1, a triode Q2, a diode D1, resistors R1, R2 and R3 and a capacitor C1. Voltage of the storage battery is detected by the voltage detection circuit, and when the voltage of the storage battery drops to the lower limit of an allowable voltage range of the battery storage, the relay is controlled to disconnect the storage battery with loads; after the relay is disconnected, all loads, including the voltage detection circuit, are disconnected with the storage battery, and the storage battery is in a completely unloaded state; when the storage battery is recharged to be connected with the loads, connection of the storage battery with the loads and the voltage detection circuit is completed by the aid of a guidance touch type starting button.
Description
Technical field
The utility model relates to a kind of protective device, specifically, is a kind of Overdischarge protection device for storage battery.
Background technology
In daily life, a lot of equipment that we use are all used storage battery.The long-term overdischarge of storage battery, will cause battery pole plates acidifying, has affected the normal service life of battery.Battery overdischarge protective circuit of the prior art, complex structure, volume is large, cost is high.
Summary of the invention
The utility model has solved the deficiencies in the prior art, and the Overdischarge protection device for storage battery that a kind of circuit structure is simple, volume is little, cost is low is provided.
In order to achieve the above object, the technical scheme that the utility model adopts is:
A kind of Overdischarge protection device for storage battery, comprise storage battery B and loading interfaces P1, between storage battery B and loading interfaces P1, be connected voltage detecting circuit, described voltage detecting circuit is by starting switch K, relay J, triode Q1, Q2, diode D1, resistance R 1, R2, R3, capacitor C 1 forms, the positive pole of described storage battery B is connected with starting switch K, the normally opened contact of described relay J is connected to starting switch K two ends, described triode Q1 collector electrode is connected with relay J one end, emitter is connected with storage battery B negative pole, base stage is connected with triode Q2 emitter, the described relay J other end is connected with starting switch K, described triode Q2 collector electrode is connected with diode D1, base stage is connected between resistance R 2 and R3, described diode D1 is connected to relay J two ends, described resistance R 1, R2, after R3 series connection, be connected in parallel on the two ends of storage battery B, described capacitor C 1 is connected to the two ends of storage battery B.
Preferably, described resistance R 2 is adjustable resistance.
The utility model detects the voltage of storage battery by voltage detecting circuit, when battery tension drops under the voltage range that storage battery allows in limited time, control relay disconnects being connected of storage battery and load.Relay has just disconnected storage battery and loaded connection after disconnecting, and comprises voltage detecting circuit, and storage battery is in complete Light Condition.Storage battery charges while connection with load again, completes being connected of storage battery and load and voltage detecting circuit by guide's touch start button.
Brief description of the drawings
Fig. 1 the utility model circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, a kind of Overdischarge protection device for storage battery, comprise storage battery B and loading interfaces P1, between storage battery B and loading interfaces P1, be connected voltage detecting circuit, described voltage detecting circuit is by starting switch K, relay J, triode Q1, Q2, diode D1, resistance R 1, R2, R3, capacitor C 1 forms, the positive pole of described storage battery B is connected with starting switch K, the normally opened contact of described relay J is connected to starting switch K two ends, described triode Q1 collector electrode is connected with relay J one end, emitter is connected with storage battery B negative pole, base stage is connected with triode Q2 emitter, the described relay J other end is connected with starting switch K, described triode Q2 collector electrode is connected with diode D1, base stage is connected between resistance R 2 and R3, described diode D1 is connected to relay J two ends, described resistance R 1, R2, after R3 series connection, be connected in parallel on the two ends of storage battery B, described capacitor C 1 is connected to the two ends of storage battery B.
Preferably, described resistance R 2 is adjustable resistance.
As shown in Figure 1, operation principle of the present utility model is as follows:
When circuit start, press starting switch K, storage battery B is just connected with voltage detecting circuit and load.Now there will be two kinds of situations, a kind of is the voltage range lower voltage limit value that battery tension allows higher than storage battery, the mid-point voltage of resistance R 2, R3 is input to the base stage of triode Q2, make Q2 conducting, Q2 drives Q1 conducting, relay J adhesive normally opened contact closure, while decontroling starting switch K, storage battery B continues to voltage detecting circuit and load supplying by the normally opened contact of J.Another kind of situation, the voltage range lower voltage limit value that the voltage of storage battery B allows lower than storage battery, the mid-point voltage of resistance R 2, R3 is input to the base stage of triode Q2, this voltage is relatively low, can not make Q2 conducting, Q1 can not conducting, and the normally opened contact of relay J remains open state, while decontroling starting switch K, storage battery B has disconnected and being connected of voltage detecting circuit and load immediately.
Storage battery B uses in powering load normal, along with the prolongation of time, the voltage of B also declines gradually, and in the time dropping to the voltage range lower voltage limit value of storage battery permission, the mid point of resistance R 2, R3 is input to the voltage of triode Q2 base stage, can become very low, can not continue to make Q2 conducting, Q2 becomes from conducting state the only state that carries, and Q1 only also carries, the normally opened contact of relay J disconnects, and disconnected being connected of storage battery B and voltage detecting circuit and load.So both protect the safety of storage battery, extended again the useful life of storage battery.
Claims (2)
1. an Overdischarge protection device for storage battery, comprise storage battery B and loading interfaces P1, it is characterized in that: between storage battery B and loading interfaces P1, be connected voltage detecting circuit, described voltage detecting circuit is by starting switch K, relay J, triode Q1, Q2, diode D1, resistance R 1, R2, R3, capacitor C 1 forms, the positive pole of described storage battery B is connected with starting switch K, the normally opened contact of described relay J is connected to starting switch K two ends, described triode Q1 collector electrode is connected with relay J one end, emitter is connected with storage battery B negative pole, base stage is connected with triode Q2 emitter, the described relay J other end is connected with starting switch K, described triode Q2 collector electrode is connected with diode D1, base stage is connected between resistance R 2 and R3, described diode D1 is connected to relay J two ends, described resistance R 1, R2, after R3 series connection, be connected in parallel on the two ends of storage battery B, described capacitor C 1 is connected to the two ends of storage battery B.
2. Overdischarge protection device for storage battery according to claim 1, is characterized in that: described resistance R 2 is adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420146005.0U CN203761034U (en) | 2014-03-28 | 2014-03-28 | Over discharge protection device for storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420146005.0U CN203761034U (en) | 2014-03-28 | 2014-03-28 | Over discharge protection device for storage battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203761034U true CN203761034U (en) | 2014-08-06 |
Family
ID=51256271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420146005.0U Expired - Fee Related CN203761034U (en) | 2014-03-28 | 2014-03-28 | Over discharge protection device for storage battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203761034U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836276A (en) * | 2015-04-14 | 2015-08-12 | 刘泽法 | 120V self-powered electric vehicle |
| CN104852424A (en) * | 2015-04-14 | 2015-08-19 | 刘泽法 | 36V self-power-generating electric vehicle |
| CN106803688A (en) * | 2015-11-26 | 2017-06-06 | 衡阳市利美电瓶车制造有限责任公司 | A kind of power-saving circuit |
| CN108680864A (en) * | 2018-04-28 | 2018-10-19 | 北京机械设备研究所 | A kind of battery discharging test device and method with under-voltage protection |
-
2014
- 2014-03-28 CN CN201420146005.0U patent/CN203761034U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836276A (en) * | 2015-04-14 | 2015-08-12 | 刘泽法 | 120V self-powered electric vehicle |
| CN104852424A (en) * | 2015-04-14 | 2015-08-19 | 刘泽法 | 36V self-power-generating electric vehicle |
| CN106803688A (en) * | 2015-11-26 | 2017-06-06 | 衡阳市利美电瓶车制造有限责任公司 | A kind of power-saving circuit |
| CN108680864A (en) * | 2018-04-28 | 2018-10-19 | 北京机械设备研究所 | A kind of battery discharging test device and method with under-voltage protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150328 |
|
| EXPY | Termination of patent right or utility model |