CN206332439U - A kind of intrinsically safe battery protection circuit - Google Patents
A kind of intrinsically safe battery protection circuit Download PDFInfo
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- CN206332439U CN206332439U CN201720007173.5U CN201720007173U CN206332439U CN 206332439 U CN206332439 U CN 206332439U CN 201720007173 U CN201720007173 U CN 201720007173U CN 206332439 U CN206332439 U CN 206332439U
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Abstract
The utility model is related to a kind of intrinsically safe battery protection circuit, belongs to electronics, communication and electrical explosion proof technical field, protects 3 sub-circuits to constitute by safe charging, battery protection, two grades of short circuit current limitations；Wherein, the backward dioded that safe charging sub-circuit is concatenated by charging sub-circuit and with it is constituted；Battery protection sub-circuit directly with by the positive and negative extreme connection of protection battery；Positive pole, negative input and the battery protection sub-circuit of two grades of short circuit current limitations protection sub-circuits are connected, its positive pole, cathode output end as the intrinsically safe battery protection circuit both positive and negative polarity discharging terminals；The output end of safe charging sub-circuit is also directly connected to battery protection sub-circuit, positive pole as the intrinsically safe battery protection circuit of the positive pole, negative input of safe charging sub-circuit, negative pole charging terminal；The circuit realiration is simple, reliability is high, applied widely, can meet the intrinsic safety requirements of electric device battery in explosive atmosphere.
Description
Technical field
The utility model is related to electronics, communication and electrical explosion proof technical field, more particularly to a kind of for rechargeable battery
Essential safety protection circuit.
Background technology
With the progress of electronic technology, applied to oil, chemical industry, the inferior explosive atmosphere of coal mine essential safe type hand
Hold that electronic equipment is more and more, while the operation efficient, lasting in order to meet these hand-hold electronic equipments, is generally required for being equipped with
Rechargeable battery.According to GB《GB 3836.1-2010 explosive atmosphere part 1s：Device-General requirement》With《GB3836.4-
The part of 2010 explosive atmosphere the 4th：The equipment protected by essential safe type " i "》Requirement, it is necessary to using in explosive atmosphere
Rechargeable battery carry out circuit on protection, to reach intrinsic safety requirements.The intrinsic safety electro proposed on the market at present
The protection circuit form that pond is used, otherwise in order to which current limliting increases current-limiting resistance, have a strong impact on battery efficiency；To battery short circuit
When the transient energy that produces consider not enough, it is defective on the circuit turn-off time and in reliability.Therefore, for problem above,
A kind of reliable intrinsically safe battery protection circuit is developed, is had important practical significance.
Utility model content
The purpose of this utility model is that proposition is a kind of to be applied to explosive atmosphere hand to overcome the weak point of prior art
The rechargeable battery protection circuit of holding equipment.The circuit can be when cell load be short-circuited, and fast shut-off discharge path makes
The energy discharged when short-circuit is no more than GB《GB 3836.1-2010》The limit value of middle defined.And the circuit is in load restoration
When normal, it can recover automatically, and the function with safe charging.
A kind of intrinsically safe battery protection circuit, it is characterised in that the circuit is by safe charging sub-circuit, battery protection
Sub-circuit, two grades of short circuit current limitation protection sub-circuit compositions；Wherein, the safe charging sub-circuit fills by charging sub-circuit and with this
At least two backward diodeds of electronic circuit input concatenation are constituted；The battery protection sub-circuit directly with by protection battery
Positive pole, negative pole end connection；Positive pole, negative input and the battery protection of two grades of short circuit current limitations protection sub-circuit
Circuit is connected, and two grades of short circuit current limitations protect the positive pole of sub-circuit, cathode output end respectively as the intrinsically safe battery
The positive pole of protection circuit, negative discharge terminal；The positive pole of the charging sub-circuit, cathode output end are used as safe charging sub-circuit
Positive pole, cathode output end be connected with the battery protection sub-circuit, at least two described backward diodeds are serially connected in described
Charged sub-circuit input, and the positive pole of the safe charging sub-circuit, negative input are protected as the intrinsically safe battery
The positive pole of circuit, negative pole charging terminal.
The characteristics of the utility model and beneficial effect：
The utility model is directed to the lithium ion battery of explosion-proof electric equipment, it is charged, discharge path is separated, and point
Independent design and safeguard protection has not been carried out, it is ensured that it meets the requirement of essential safety, enhance the safety of whole circuit
Property and reliability.The circuit when load is broken down, can quickly, the cut-out circuit of active, in trouble shooting, can from
It is dynamic to recover.The circuit realiration is simple, reliability is high, applied widely, can meet the sheet of electric device battery in explosive atmosphere
Matter safety requirements.
Brief description of the drawings
Fig. 1 is intrinsically safe battery protection circuit schematic diagram of the present utility model.
Embodiment
The utility model proposes a kind of intrinsically safe battery protection circuit, applied to explosive atmosphere handheld device
The protection of rechargeable battery, it meets《GB 3836.1-2010》In requirement to essential safety battery.Protection equipment is in blast
Property environment in using safety.Described in detail below in conjunction with drawings and Examples as follows：
Intrinsically safe battery protection circuit of the present invention as shown in figure 1, the circuit by safe charging sub-circuit 6,
Battery protection sub-circuit 2, two grades of short circuit current limitation protection sub-circuits 3 are constituted；Wherein, the safe charging sub-circuit 6 is by charging
Circuit 4 and constituted with least two backward diodeds 5 that the charging sub-circuit input is concatenated；The battery protection sub-circuit 2
Directly it is connected with by the positive pole of protection battery 1, negative pole end；The positive pole of two grades of short circuit current limitations protection sub-circuit 3, negative pole input
End is connected with battery protection sub-circuit 2, and two grades of short circuit current limitations protect the positive pole of sub-circuit 3, cathode output end respectively as this
The positive pole of matter safe battery protection circuit, negative discharge terminal 8；The positive pole of charging sub-circuit 4, cathode output end are used as safety
The positive pole of charging sub-circuit 6, cathode output end are directly connected with battery protection sub-circuit 2, at least two described reverse two poles
Pipe 5 is serially connected in the input of the charging sub-circuit 4, and the positive pole of the safe charging sub-circuit 6, negative input are used as this
The positive pole of matter safe battery protection circuit, negative pole charging terminal 7.
The function and specific implementation of each sub-circuit of the present utility model are respectively described below：
Described in the utility model can be that can be connected between a section or more piece, each batteries, simultaneously by protection battery 1
Connection or connection in series-parallel.
Battery protection sub-circuit 2 described in the utility model, can be according to protected battery number, connected mode (string
It is in parallel), charging voltage and charging current, from the application-specific integrated circuit (IC chip) and circuit for commonly using producer on the market, including
But it is not limited to TI (Texas Instrument) and the battery protecting circuit of Seiko.The circuit prevented protection battery in charging process
Fill, prevented from putting in discharge process.
Safe charging sub-circuit 6 described in the utility model, can be according to protected battery number, connected mode (string
It is in parallel), charging voltage and charging current, from the application-specific integrated circuit and circuit for commonly using producer on the market, including but not limited to TI electricity
Pond charging circuit.The selection of the backward dioded meets the requirement of charging voltage, charging current.
Two grades of short circuit current limitations described in the utility model protect sub-circuit 3, can according to by the discharge voltage of protection battery,
TPS2594X system of the requirement of discharge current from the application-specific integrated circuit and circuit, including but not limited to TI companies for commonly using producer on the market
Row chip.The sub-circuit need to have low conducting internal resistance (usually need to be less than 100 milliohms), can meet the service efficiency of battery；
Meanwhile, the selection of the sub-circuit must have quick overcurrent protection cutting function, can be in the case where being loaded with short circuit, quickly
Cut-out battery is powered, and its break time should meet：By the energy that short circuit is discharged is less than GB within the time《GB
3836.1-2010》Required energy, so as to reach requirement of explosion proof.
The utility model proposes intrinsically safe battery protection circuit, its operation principle is described as follows：
This circuit in actual applications will be according to GB《GB 3836.1-2010》It is required that with being one by protection battery glue envelope
Individual entirety.Battery 1 is in explosive atmosphere during normal work, and only battery protection sub-circuit 2 and two grades of short circuit current limitation protections is sub
Circuit 3 is in running order.Due to the presence of backward dioded 5, the terminal 7 of safe charging sub-circuit 6 is without output.Now, it is electric
Stream is by battery protection sub-circuit 2 and two grades of short circuit current limitation protection sub-circuits 3, through discharging terminals 8, powering load.Work as load
When circuit has short trouble, two grades of short circuit current limitation protection sub-circuits 3 detect that electric current exceeds its given threshold, then cut rapidly
Disconnected discharge path, it is ensured that the discharge energy of moment is no more than《GB 3836.1-2010》In requirement to essential safety battery；When
When the short trouble of load circuit is released, two grades of short circuit current limitation protection sub-circuits 3 can recover automatically, open discharge path, it is ensured that
Load supplying is normal.When the discharge voltage of battery 1 is low crosses the overdischarge pressure value of setting, the trigger protection of battery protection sub-circuit 2 is cut
Disconnected discharge path, prevents that battery 1 from crossing and puts damage battery；When the mistake that battery 1 exceedes setting through overcharge or other reasonses voltage is put
During magnitude of voltage, battery protection sub-circuit 2 recovers automatically, opens discharge path, it is ensured that load supplying is normal.
When battery charges in place of safety, charging equipment electric current is by charging end 7, into safe charging sub-circuit 6, by electricity
Sub-circuit 2 is protected in pond, and battery 1 is charged.Now, charging sub-circuit 4 sets the size of charging current and charging voltage,
The size for the overcharge threshold voltage that battery protection sub-circuit 2 is set.When battery is full of automatically, charging sub-circuit 4 can be cut
Disconnected charging path；When being made a mistake in battery charging process, charging sub-circuit 4 can cut off charging path, and in failure solution
Except when, recover charging.When cell voltage has exceeded the overcharge threshold voltage of setting, the cut-out charging of battery protection sub-circuit 2
Path, prevents from overcharging damage battery；After protection is overcharged, cell voltage reduction, during less than overcharge threshold voltage, charging
Path can recover to open automatically.
Claims (1)
1. a kind of intrinsically safe battery protection circuit, it is characterised in that the circuit is by safe charging sub-circuit, battery protection
Circuit, two grades of short circuit current limitation protection sub-circuit compositions；Wherein, the safe charging sub-circuit by charging sub-circuit and with the charging
At least two backward diodeds of sub-circuit input concatenation are constituted；The battery protection sub-circuit directly with by protection battery
Positive pole, negative pole end connection；Positive pole, negative input and the battery protection electricity of two grades of short circuit current limitations protection sub-circuit
Road is connected, and the positive pole of two grades of short circuit current limitations protection sub-circuit, cathode output end are protected respectively as the intrinsically safe battery
The positive pole of protection circuit, negative discharge terminal；The positive pole of the charging sub-circuit, cathode output end are used as safe charging sub-circuit
Positive pole, cathode output end are connected with the battery protection sub-circuit, and at least two described backward diodeds are serially connected in described fill
Electronic circuit input, the positive pole of the safe charging sub-circuit, negative input protect electricity as the intrinsically safe battery
The positive pole on road, negative pole charging terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720007173.5U CN206332439U (en) | 2017-01-04 | 2017-01-04 | A kind of intrinsically safe battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720007173.5U CN206332439U (en) | 2017-01-04 | 2017-01-04 | A kind of intrinsically safe battery protection circuit |
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| Publication Number | Publication Date |
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| CN206332439U true CN206332439U (en) | 2017-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720007173.5U Active CN206332439U (en) | 2017-01-04 | 2017-01-04 | A kind of intrinsically safe battery protection circuit |
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| CN (1) | CN206332439U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558873A (en) * | 2017-01-04 | 2017-04-05 | 北京中安科创科技发展有限公司 | A kind of intrinsically safe battery protection circuit |
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2017
- 2017-01-04 CN CN201720007173.5U patent/CN206332439U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558873A (en) * | 2017-01-04 | 2017-04-05 | 北京中安科创科技发展有限公司 | A kind of intrinsically safe battery protection circuit |
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