CN206349787U - A kind of battery bag opens protection circuit - Google Patents
A kind of battery bag opens protection circuit Download PDFInfo
- Publication number
- CN206349787U CN206349787U CN201621466122.0U CN201621466122U CN206349787U CN 206349787 U CN206349787 U CN 206349787U CN 201621466122 U CN201621466122 U CN 201621466122U CN 206349787 U CN206349787 U CN 206349787U
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- China
- Prior art keywords
- control circuit
- battery
- battery bag
- triode
- circuit
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Abstract
The utility model is related to a kind of battery bag and opens protection circuit, detection circuit is opened including MCU control circuit, charge/discharge control circuit and battery bag, battery bag opens whether detection electric circuit inspection battery pack case is opened, and send testing result to MCU control circuit, testing result is identified MCU control circuit, and forbid discharge signal to charge/discharge control circuit being identified as sending when battery pack case is opened, charge/discharge control circuit, for receive it is described forbid discharge signal when cut-out battery electric current output.The utility model can close battery output when repairing or generation is unexpected, protect battery pack, and protect the personal safety of personnel.
Description
Technical field
The utility model is related to field of batteries, more particularly to a kind of battery bag opens protection circuit.
Background technology
Typically power, battery are provided in the equipment such as electric car using the battery pack of multisection lithium battery (such as 18650) composition
Group closing is arranged in shell to protect battery element, and the problem of presently, there are is that, when repairing battery bag, shell can be beaten
Open, general maintenance personal needs to detect whether battery powers off manually, and operation is cumbersome, and when shell is opened accidentally, people
Just it is easy to ignore whether detection battery powers off, is so easy for occurring electric shock accidents.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of battery bag and opens protection circuit, can be in battery bag
It is automatic when shell is opened to close battery output, protect personal security.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：A kind of battery bag opens protection circuit, including
MCU control circuit and charge/discharge control circuit, in addition to battery open detection circuit；
Battery bag opens detection circuit, is connected with MCU control circuit, for detecting whether battery pack case is opened, and
Testing result is sent to the MCU control circuit；
MCU control circuit, its input is opened detection circuit with the battery bag and is connected, its output end and control of discharge electricity
Road is connected, for the testing result to be identified, and is being identified as sending power down control signal when battery pack case is opened
To the charge/discharge control circuit；
Charge/discharge control circuit, it is connected with the MCU control circuit, for being cut when receiving the power down control signal
Power off the electric current output in pond.
The beneficial effects of the utility model are：Repairing or occurring surprisingly to cause battery bag to open constantly, MCU control circuit
The testing result of detection circuit is opened according to battery bag, control charge/discharge control circuit closes battery output, protects battery pack, and
The personal safety of protection personnel.
On the basis of above-mentioned technical proposal, the utility model can also do following improvement.
Further, the battery bag, which opens detection circuit, includes detection switch, resistance R2, resistance R3 and triode, power supply
Connect one end of the detection switch and the base stage of the triode respectively by the resistance R2, the detection switch it is another
End is grounded after being connected with the emitter stage of the triode, and power supply also connects the current collection of the triode respectively by the resistance R3
Pole and testing result coffret, the battery bag open detection circuit and send detection knot by the testing result coffret
Really to the MCU control circuit.
Further, the detection switch is that the magnet installed on tongue tube, with the correspondence position of battery case is supported the use,
When battery case is not switched on, tongue tube adhesive simultaneously controls the triode to turn off, and when battery case is opened, tongue tube disconnects
And control the triode ON.
Further, in addition to voltage-stabiliser tube, the anode of the voltage-stabiliser tube is connected with the emitter stage of the triode, the voltage stabilizing
The negative electrode of pipe is connected with the base stage of the triode.
Brief description of the drawings
Fig. 1 opens the schematic diagram of protection circuit for a kind of battery bag that the utility model embodiment is provided；
Fig. 2 opens the circuit diagram of detection circuit for the battery bag that the utility model embodiment is provided；
The circuit diagram for the MCU control circuit that Fig. 3 provides for the utility model embodiment；
The circuit diagram for the charge/discharge control circuit that Fig. 4 provides for the utility model embodiment.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit scope of the present utility model.
Existing BMS (battery management system) opens detection function without battery bag, is repairing or is occurring unexpected cause
Battery bag is opened constantly, easily occurs electric shock accidents, detection circuit is opened embodiment adds battery bag, so that BMS
It is provided with battery bag and opens detection function.
As shown in figure 1, a kind of battery bag opens protection circuit, including MCU control circuit, charge/discharge control circuit and battery bag
Open detection circuit；
Battery bag opens detection circuit, is connected with MCU control circuit, for detecting whether battery pack case is opened, and
Testing result is sent to the MCU control circuit；
MCU control circuit, its input is opened detection circuit with the battery bag and is connected, its output end and control of discharge electricity
Road is connected, for the testing result to be identified, and is being identified as sending power down control signal when battery pack case is opened
To the charge/discharge control circuit；
Charge/discharge control circuit, it is connected with the MCU control circuit, for being cut when receiving the power down control signal
Power off the electric current output in pond.
Alternatively, as one embodiment of the present utility model, as shown in Fig. 2 battery bag, which opens detection circuit, includes inspection
Slowdown monitoring switch K1 and triode Q2, detection switch K1 one end connection connecting triode Q2 base stage, the detection switch K1 other end
Connecting triode Q2 emitter stage, when the shell of battery bag is normally closed, detection switch K1 closures, now, triode Q2 are pass
Disconnected state, output end Magnetism_Sig output high level, when the shell of battery bag is opened, detection switch K1 disconnects, triode
Q2 is turned on, Magnetism_Sig output low levels.
Fig. 3 is the schematic diagram of MCU control circuit, when MCU control circuit is detecting Magnetism_Sig for low level
When, corresponding power down control signal OUTSIG will be sent to charge/discharge control circuit.
As shown in figure 4, charge/discharge control circuit disconnects battery pack when receiving the power down control signal of OUTSIG inputs
Output.
Alternatively, as one embodiment of the present utility model, detection switch selects tongue tube, corresponding with battery case
The magnet installed on position is supported the use, when battery case is not switched on, tongue tube adhesive, when battery case is opened, dry spring
Pipe disconnects.
Alternatively, as one embodiment of the present utility model, as shown in Fig. 2 also including voltage-stabiliser tube D18, the voltage stabilizing
The anode of pipe is connected with the emitter stage of the triode, and the negative electrode of the voltage-stabiliser tube is connected with the base stage of the triode.
Alternatively, as one embodiment of the present utility model, in addition to MCU control circuit is also being identified outside battery bag
The step of correlation log being recorded when shell is opened, it is convenient to search relative recording when overhauling battery.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in guarantor of the present utility model
Within the scope of shield.
Claims (4)
1. a kind of battery bag opens protection circuit, it is characterised in that including MCU control circuit, charge/discharge control circuit and battery bag
Open detection circuit；
Battery bag opens detection circuit, is connected with MCU control circuit, for detecting whether battery pack case is opened, and will inspection
Result is surveyed to send to the MCU control circuit；
MCU control circuit, its input is opened detection circuit with the battery bag and is connected, and its output end connects with charge/discharge control circuit
Connect, for the testing result to be identified, and be identified as sending power down control signal to institute when battery pack case is opened
State charge/discharge control circuit；
Charge/discharge control circuit, it is connected with the MCU control circuit, for cutting off electricity when receiving the power down control signal
The electric current output in pond.
2. a kind of battery bag opens protection circuit according to claim 1, it is characterised in that the battery bag opens detection electricity
Road includes detection switch, resistance R2, resistance R3 and triode, and power supply connects the detection switch respectively by the resistance R2
One end and the base stage of the triode, the other end of the detection switch are grounded after being connected with the emitter stage of the triode, electricity
Source also connects the colelctor electrode and testing result coffret of the triode respectively by the resistance R3, and the battery bag is opened
Detect that circuit sends testing result to the MCU control circuit by the testing result coffret.
3. a kind of battery bag opens protection circuit according to claim 2, it is characterised in that the detection switch is dry spring
Pipe, is supported the use, when battery case is not switched on, tongue tube adhesive is simultaneously controlled with the magnet installed on the correspondence position of battery case
The triode shut-off is made, when battery pack case is opened, tongue tube disconnects and controls the triode ON.
4. a kind of battery bag opens protection circuit according to Claims 2 or 3, it is characterised in that described also including voltage-stabiliser tube
The anode of voltage-stabiliser tube is connected with the emitter stage of the triode, and the negative electrode of the voltage-stabiliser tube is connected with the base stage of the triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621466122.0U CN206349787U (en) | 2016-12-29 | 2016-12-29 | A kind of battery bag opens protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621466122.0U CN206349787U (en) | 2016-12-29 | 2016-12-29 | A kind of battery bag opens protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206349787U true CN206349787U (en) | 2017-07-21 |
Family
ID=59319649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621466122.0U Active CN206349787U (en) | 2016-12-29 | 2016-12-29 | A kind of battery bag opens protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206349787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786923A (en) * | 2016-12-29 | 2017-05-31 | 江苏小牛电动科技有限公司 | A kind of battery bag opens protection circuit and method |
-
2016
- 2016-12-29 CN CN201621466122.0U patent/CN206349787U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786923A (en) * | 2016-12-29 | 2017-05-31 | 江苏小牛电动科技有限公司 | A kind of battery bag opens protection circuit and method |
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