CN203261014U - Lithium battery protection board - Google Patents
Lithium battery protection board Download PDFInfo
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- CN203261014U CN203261014U CN 201320277621 CN201320277621U CN203261014U CN 203261014 U CN203261014 U CN 203261014U CN 201320277621 CN201320277621 CN 201320277621 CN 201320277621 U CN201320277621 U CN 201320277621U CN 203261014 U CN203261014 U CN 203261014U
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- resistance
- triode
- nmos pipe
- pipe
- pmos pipe
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Abstract
The utility model discloses a lithium battery protection board. The board comprises a detection module and a control module connected with the detection module. The detection module comprises a detection chip, a first PMOS pipe and a second PMOS pipe. The detection chip detects a voltage of the battery and controls conduction and cut off of the first PMOS pipe and the second PMOS pipe according to the voltage. The control module comprises a first NMOS pipe, a second NMOS pipe, a discharging control unit and a charging control unit. The discharging control unit controls the cut off and the conduction of the first NMOS pipe according to the conduction and the cut off of the first PMOS pipe. The charging control unit controls the cut off and the conduction of the second NMOS pipe according to the conduction and the cut off of the second PMOS pipe. The lithium battery protection board of the utility model possesses the advantages that the structure is simple; production cost is low and reliability is high.
Description
Technical field
The utility model relates to the technical field of the accessory of lithium battery, relates more specifically to a kind of lithium battery protection board.
Background technology
Lithium battery has been widely used in the various portable type electronic products such as mobile phone, MP3, panel computer, navigator as a kind of high efficient energy sources carrier at present, and the trend of further expansion range of application is arranged.
Because the material of lithium battery and architectural characteristic have determined the abnormal conditions such as it can not occur overcharging when using, excessively put.In the lithium battery use procedure as occur overcharging, cross and the abnormal conditions such as to put and greatly to shorten the useful life of lithium battery; and also may cause lithium battery to burn; even the security incident such as set off an explosion; therefore automatically cut off the charge or discharge loop in the time of the abnormal conditions such as putting to occur overcharging at lithium battery, to cross for the corresponding administration module of lithium battery Pei Ge, thereby protect lithium battery.
Yet the problems such as existing lithium battery administration module or Bao Hu Zhuan Ge ubiquity technical sophistication, production cost are higher, poor reliability.
Therefore, be necessary to provide a kind of lithium battery protection board to overcome defects.
The utility model content
The purpose of this utility model provides a kind of lithium battery protection board, and it has simple in structure, the low high characteristics of reliability that reach of production cost.
To achieve these goals; the utility model provides a kind of lithium battery protection board; comprise detection module and the control module that is connected with described detection module; described detection module comprises detection chip; the one PMOS pipe and the 2nd PMOS pipe; described detection chip is connected with battery; described PMOS pipe and the 2nd PMOS of being connected manage and all are connected with described detection chip; described control module comprises NMOS pipe; the 2nd NMOS pipe; control of discharge unit and charging control unit; one end of described control of discharge unit is connected with the source electrode of a described PMOS pipe; the other end is connected with the grid of a described NMOS pipe and is used for according to the conducting of a described PMOS pipe and conducting and the cut-off of the described NMOS pipe of cut-off control, and an end of described charging control unit is connected with the source electrode of described the 2nd PMOS pipe; the other end is connected with the grid of described the 2nd NMOS pipe and is used for according to the conducting of described the 2nd PMOS pipe and conducting and the cut-off of described the 2nd NMOS pipe of cut-off control.
Compared with prior art, because the detection module of lithium battery protection board of the present utility model comprises detection chip, the one PMOS pipe and the 2nd PMOS pipe, described detection chip detects the voltage of battery and according to conducting and the cut-off of described voltage control the one PMOS pipe and the 2nd PMOS pipe, control module comprises NMOS pipe, the 2nd NMOS pipe, control of discharge unit and charging control unit, described control of discharge unit is according to the conducting of a described PMOS pipe and cut-off and the conducting of the described NMOS pipe of cut-off control, and described charging control unit is according to the conducting of described the 2nd PMOS pipe and cut-off and the conducting of described the 2nd NMOS pipe of cut-off control; The voltage that detects battery when detection chip was lower than when putting threshold value will make the conducting of PMOS pipe, and the conducting of a PMOS pipe will make the control of discharge unit drag down the grid voltage of a NMOS pipe, and then make the cut-off of NMOS pipe and cut off discharge loop; And the voltage that detects battery when detection chip is higher than and will makes the conducting of the 2nd PMOS pipe when overcharging threshold value; the conducting of the 2nd PMOS pipe will make charging control unit drag down the grid voltage of the 2nd NMOS pipe; and then make the cut-off of the 2nd NMOS pipe and the cut-out charge circuit; thereby realized the protection to the lithium battery charge and discharge, and had simple in structure, the low high characteristics of reliability that reach of production cost.
Preferably, described detection chip comprises the positive supply input terminal, the negative supply input terminal, the control of discharge splicing ear, charging control connection terminal and voltage detection terminal, described positive supply input terminal is used for being connected with the positive pole of battery, described negative supply input terminal is used for being connected with the negative pole of described battery, described control of discharge splicing ear is connected with the grid of a described PMOS pipe, described charging control connection terminal is connected with the grid of described the 2nd PMOS pipe, and described PMOS pipe and the drain electrode of the 2nd PMOS pipe of being connected all are connected with the positive pole of described battery, and described voltage detection terminal is for being connected with the negative pole of described battery.
Preferably, also be provided with delay capacitor between described positive supply input terminal and the described negative supply input terminal.
Preferably, described control of discharge unit comprises the first resistance, the second resistance and the first triode, the input of described the first resistance is connected with the source electrode of a described PMOS pipe, the output of described the first resistance is connected with the base stage of described the first triode, described the second resistance is connected with the output of described the first resistance and the emitter of described the first triode, the collector electrode of described the first triode is connected with the grid of a described NMOS pipe, the grid of a described NMOS pipe is used for being connected with driving voltage, the source electrode of a described NMOS pipe is used for being connected with the negative pole of described battery, and the drain electrode of a described NMOS pipe is connected with the source electrode of described the 2nd NMOS pipe and is used for being connected with the negative pole of load device.
Preferably, described charging control unit comprises the 3rd resistance, the 4th resistance and the second triode, the input of described the 3rd resistance is connected with the source electrode of described the 2nd PMOS pipe, the output of described the second resistance is connected with the base stage of described the second triode, described the 4th resistance is connected with the output of described the 3rd resistance and the emitter of described the second triode, the collector electrode of described the second triode is connected with the grid of described the 2nd NMOS pipe, the grid of described the 2nd NMOS pipe is used for being connected with driving voltage, the source electrode of described the 2nd NMOS pipe is connected with the drain electrode of a described NMOS pipe and is used for being connected with the negative pole of described load device, and the drain electrode of described the 2nd NMOS pipe is used for being connected with the negative pole of charge power supply.
Preferably, described control module also comprises the first fault control unit, described the first fault control unit comprises the 5th resistance, the 6th resistance and the 3rd triode, the input of described the 5th resistance is connected with the output of described the second resistance and the emitter of the 3rd triode, the output of described the 5th resistance is connected with the base stage of described the 3rd triode and the input of described the 6th resistance, the output of described the 6th resistance is connected with the drain electrode of a described NMOS pipe, and the collector electrode of described the 3rd triode is connected with the grid of a described NMOS pipe.
Preferably, described control module also comprises the second fault control unit, described the second fault control unit comprises the 7th resistance, the 8th resistance and the 4th triode, the input of described the 7th resistance is connected to be communicated with the negative pole of charge power supply with the drain electrode of described the 2nd NMOS pipe, the output of described the 7th resistance is connected with the base stage of described the 4th triode and the input of described the 8th resistance, the output of described the 8th resistance is connected with the emitter of described the 4th triode, and the emitter of described the 4th triode is connected to be communicated with the negative pole of described battery with the source electrode of a described NMOS pipe.
By following description also by reference to the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used for explaining embodiment of the present utility model.
Description of drawings
Fig. 1 is the connection diagram of lithium battery protection board of the present utility model and battery, charge power supply and Fu Zai Zhuan Ge.
Fig. 2 is the circuit diagram of an embodiment of lithium battery protection board of the present utility model.
Fig. 3 is the corresponding relation figure of each pin function of detection chip among Fig. 2.
Fig. 4 is the circuit diagram of another embodiment of lithium battery protection board of the present utility model.
Embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, similar element numbers represents similar element in the accompanying drawing.
With reference to Fig. 1, one embodiment of lithium battery protection board 100 of the present utility model, the P-interface of described lithium battery protection board 100 is connected with the negative pole interface of Fu Zai Zhuan Ge 300, the anode interface of described Fu Zai Zhuan Ge 300 is connected with the positive pole of battery 200, the negative pole of described battery 200 is connected with the BAT-interface of described lithium battery protection board 100, thereby forms discharge loop; The C-interface of described lithium battery protection board 100 is connected with the negative pole of charge power supply 400, and the positive pole of described charge power supply 400 is connected with the positive pole of battery 200, thereby forms charge circuit; Wherein, the positive and negative terminal of the signal wire interface of described lithium battery protection board 100 is connected with the positive and negative electrode of described battery 200 respectively, to control the break-make in charge and discharge loop by the change in voltage that detects described battery 200.
In conjunction with Fig. 1 and Fig. 2, lithium battery protection board 100 of the present utility model comprises detection module 101 and the control module 102 that is connected with described detection module 101.Described detection module 101 comprises detection chip U1, the one PMOS pipe Q1A and the 2nd PMOS pipe Q1B, described detection chip U1 comprises positive supply input terminal (pin 5), negative supply input terminal (pin 6), control of discharge splicing ear (pin 1), charging control connection terminal (pin 3) and voltage detection terminal (pin 2), described positive supply input terminal is used for being connected with the positive pole of battery 200, described negative supply input terminal is used for being connected with the negative pole of described battery 200, described control of discharge splicing ear is connected with the grid of described PMOS pipe Q1A, described charging control connection terminal is connected with the grid of described the 2nd PMOS pipe Q1B, and described PMOS pipe Q1A be connected the drain electrode of the 2nd PMOS pipe Q1B and all be connected with the positive pole of described battery 200, described voltage detection terminal is for being connected with the negative pole of described battery 200.
Particularly, described PMOS pipe Q1A and described the 2nd PMOS pipe Q1B are depletion type PMOS pipe.
Particularly, described detection chip is Seiko S-8261.
Particularly, the corresponding relation of each pin function of described detection chip U1 as shown in Figure 3.
In conjunction with Fig. 1 and Fig. 2, described control module 102 comprises a NMOS pipe Q11, the 2nd NMOS pipe Q12, control of discharge unit, charging control unit, the first fault control unit and the second fault control unit.
Particularly, described NMOS pipe Q11 and described the 2nd NMOS pipe Q12 are depletion type NMOS pipe, and the model of described NMOS pipe Q11 and described the 2nd NMOS pipe Q12 is IRFB4310.
Particularly, described control of discharge unit comprises the first resistance R 11, the second resistance R 12 and the first triode T1, the input of described the first resistance R 11 is connected with the source electrode of described PMOS pipe Q1A, the output of described the first resistance R 11 is connected with the base stage of described the first triode T1, the input of described the second resistance R 12 is connected with the output of described the first resistance R 11, output is connected with the emitter of described the first triode T1, the collector electrode of described the first triode T1 is connected with the grid of described NMOS pipe Q11, the grid of described NMOS pipe Q11 is used for being connected with driving voltage, the source electrode of described NMOS pipe Q11 is used for being connected with the negative pole of described battery 200, and the drain electrode of described NMOS pipe Q11 is connected with the source electrode of described the 2nd NMOS pipe Q12 and is used for being connected with the negative negative pole that carries dress Ge 300.Particularly, the grid of described NMOS pipe Q11 is connected with the positive pole of described battery 200.
Particularly, described charging control unit comprises the 3rd resistance R 13, the 4th resistance R 14 and the second triode T2, the input of described the 3rd resistance R 13 is connected with the source electrode of described the 2nd PMOS pipe Q1B, the output of described the 3rd resistance R 13 is connected with the base stage of described the second triode T2, the input of described the 4th resistance R 14 is connected with the output of described the 3rd resistance R 13, output is connected with the emitter of described the second triode T2, the collector electrode of described the second triode T2 is connected with the grid of described the 2nd NMOS pipe Q12, the grid of described the 2nd NMOS pipe Q12 is used for being connected with driving voltage, the source electrode of described the 2nd NMOS pipe Q12 is connected with the drain electrode of described NMOS pipe Q11 and is used for being connected with the described negative negative pole that carries dress Ge 300, and the drain electrode of described the 2nd NMOS pipe Q12 is used for being connected with the negative pole of charge power supply 400.Particularly, the grid of described the 2nd NMOS pipe Q12 is connected with the positive pole of described battery 200.
Particularly, described the first fault control unit comprises the 5th resistance R 15, the 6th resistance R 16 and the 3rd triode T3, the input of described the 5th resistance R 15 is connected with the output of described the second resistance R 12 and the emitter of the 3rd triode T3, the output of described the 5th resistance R 15 is connected with the base stage of described the 3rd triode T3 and the input of described the 6th resistance R 16, the output of described the 6th resistance R 16 is connected with the drain electrode of described NMOS pipe Q11, and the collector electrode of described the 3rd triode T3 is connected with the grid of described NMOS pipe Q11.When short circuit occurring, described the 3rd triode T3 is with conducting, thereby the grid voltage that drags down NMOS pipe Q11 makes the Q11 cut-off of NMOS pipe and cuts off discharge loop.
Particularly, described the second fault control unit comprises the 7th resistance R 17, the 8th resistance R 18 and the 4th triode T4, the input of described the 7th resistance R 17 is connected with the negative pole with charge power supply 400 with the drain electrode of described the 2nd NMOS pipe Q12 and is communicated with, the output of described the 7th resistance R 17 is connected with the base stage of described the 4th triode T4 and the input of described the 8th resistance R 18, the output of described the 8th resistance R 18 is connected with the emitter of described the 4th triode T4, and the emitter of described the 4th triode T4 is connected with the negative pole with described battery 200 with the source electrode of described NMOS pipe Q11 and is communicated with.When short circuit occurring, described the 4th triode T4 is with conducting, thereby the grid voltage that drags down NMOS pipe Q11 makes the Q11 cut-off of NMOS pipe and cuts off the charge and discharge loop.
With reference to Fig. 4; another embodiment of lithium battery protection board 100 of the present utility model; described lithium battery protection board 100 comprises detection module 201(202,203,204,205,206,207) and control module 208, described detection module 201(202,203,204,205,206,207) all be connected with described control module 108.
Particularly, described detection module 201 also comprises a plurality of protective resistance R1(R1A, R1B, R1C and R1D); Described detection module 202 also comprises a plurality of protective resistance R2(R2A, R2B, R2C and R2D); Described detection module 203 also comprises a plurality of protective resistance R3(R3A, R3B, R3C and R3D); Described detection module 204 also comprises a plurality of protective resistance R4(R4A, R4B, R4C and R4D); Described detection module 205 also comprises a plurality of protective resistance R5(R5A, R5B, R5C and R5D); Described detection module 206 also comprises a plurality of protective resistance R6(R6A, R6B, R6C and R6D); Described detection module 207 also comprises a plurality of protective resistance R7(R7A, R7B, R7C and R7D).
It should be noted that since present embodiment in described detection module 201(202,203,204,205,206,207) and the circuit structure of control module 208 similar to the above embodiments, so do not repeat them here.
In sum, because the detection module 101 of lithium battery protection board 100 of the present utility model comprises detection chip, the one PMOS pipe and the 2nd PMOS pipe, described detection chip detects the voltage of battery and according to conducting and the cut-off of described voltage control the one PMOS pipe and the 2nd PMOS pipe, control module 102 comprises control of discharge unit and charging control unit, described control of discharge unit is according to the conducting of a described PMOS pipe and cut-off and the conducting of the described NMOS pipe of cut-off control, described charging control unit is according to the conducting of described the 2nd PMOS pipe and cut-off and the conducting of described the 2nd NMOS pipe of cut-off control, therefore the voltage that detects battery 200 when detection chip was lower than when putting threshold value, the grid that the control of discharge splicing ear will be exported a low level to a PMOS pipe makes the conducting of PMOS pipe, the conducting of the one PMOS pipe will drive the simultaneously conducting of the first triode, the conducting of the first triode will drag down the grid voltage of a NMOS pipe, and then make the cut-off of NMOS pipe and the cut-out discharge loop; And the voltage that detects battery when detection chip is higher than when overcharging threshold value; the grid that charging control connection terminal will be exported a low level to the two PMOS pipes makes the conducting of the 2nd PMOS pipe; the conducting of the 2nd PMOS pipe will drive the simultaneously conducting of the second triode; the conducting of the second triode will drag down the grid voltage of the 2nd NMOS pipe; and then make the cut-off of the 2nd NMOS pipe and the cut-out charge circuit; thereby realized the protection to the lithium battery charge and discharge, and had simple in structure, the low high characteristics of reliability that reach of production cost.
Abovely in conjunction with most preferred embodiment the utility model is described, but the utility model is not limited to the embodiment of above announcement, and should contains various modification, equivalent combinations of carrying out according to essence of the present utility model.
Claims (7)
1. lithium battery protection board; comprise detection module and the control module that is connected with described detection module; it is characterized in that; described detection module comprises detection chip; the one PMOS pipe and the 2nd PMOS pipe; described detection chip detects the voltage of battery and according to conducting and the cut-off of the described PMOS pipe of described voltage control and described the 2nd PMOS pipe; described control module comprises NMOS pipe; the 2nd NMOS pipe; control of discharge unit and charging control unit; described control of discharge unit is according to the conducting of a described PMOS pipe and cut-off and the conducting of the described NMOS pipe of cut-off control, and described charging control unit is according to the conducting of described the 2nd PMOS pipe and cut-off and the conducting of described the 2nd NMOS pipe of cut-off control.
2. lithium battery protection board as claimed in claim 1; it is characterized in that; described detection chip comprises the positive supply input terminal; the negative supply input terminal; the control of discharge splicing ear; charging control connection terminal and voltage detection terminal; described positive supply input terminal is used for being connected with the positive pole of battery; described negative supply input terminal is used for being connected with the negative pole of described battery; described control of discharge splicing ear is connected with the grid of a described PMOS pipe; described charging control connection terminal is connected with the grid of described the 2nd PMOS pipe; and described PMOS pipe and the drain electrode of the 2nd PMOS pipe of being connected all are connected with the positive pole of described battery, and described voltage detection terminal is for being connected with the negative pole of described battery.
3. lithium battery protection board as claimed in claim 2 is characterized in that, also is provided with delay capacitor between described positive supply input terminal and the described negative supply input terminal.
4. lithium battery protection board as claimed in claim 1; it is characterized in that; described control of discharge unit comprises the first resistance; the second resistance and the first triode; the input of described the first resistance is connected with the source electrode of a described PMOS pipe; the output of described the first resistance is connected with the base stage of described the first triode; described the second resistance is connected with the output of described the first resistance and the emitter of described the first triode; the collector electrode of described the first triode is connected with the grid of a described NMOS pipe; the grid of a described NMOS pipe is used for being connected with driving voltage; the source electrode of a described NMOS pipe is used for being connected with the negative pole of described battery, and the drain electrode of a described NMOS pipe is connected with the source electrode of described the 2nd NMOS pipe and is used for being connected with the negative pole of load device.
5. lithium battery protection board as claimed in claim 4; it is characterized in that; described charging control unit comprises the 3rd resistance; the 4th resistance and the second triode; the input of described the 3rd resistance is connected with the source electrode of described the 2nd PMOS pipe; the output of described the second resistance is connected with the base stage of described the second triode; described the 4th resistance is connected with the output of described the 3rd resistance and the emitter of described the second triode; the collector electrode of described the second triode is connected with the grid of described the 2nd NMOS pipe; the grid of described the 2nd NMOS pipe is used for being connected with driving voltage; the source electrode of described the 2nd NMOS pipe is connected with the drain electrode of a described NMOS pipe and is used for being connected with the negative pole of described load device, and the drain electrode of described the 2nd NMOS pipe is used for being connected with the negative pole of charge power supply.
6. lithium battery protection board as claimed in claim 4; it is characterized in that; described control module also comprises the first fault control unit; described the first fault control unit comprises the 5th resistance; the 6th resistance and the 3rd triode; the input of described the 5th resistance is connected with the output of described the second resistance and the emitter of the 3rd triode; the output of described the 5th resistance is connected with the base stage of described the 3rd triode and the input of described the 6th resistance; the output of described the 6th resistance is connected with the drain electrode of a described NMOS pipe, and the collector electrode of described the 3rd triode is connected with the grid of a described NMOS pipe.
7. lithium battery protection board as claimed in claim 1; it is characterized in that; described control module also comprises the second fault control unit; described the second fault control unit comprises the 7th resistance; the 8th resistance and the 4th triode; the input of described the 7th resistance is connected to be communicated with the negative pole of charge power supply with the drain electrode of described the 2nd NMOS pipe; the output of described the 7th resistance is connected with the base stage of described the 4th triode and the input of described the 8th resistance; the output of described the 8th resistance is connected with the emitter of described the 4th triode, and the emitter of described the 4th triode is connected to be communicated with the negative pole of described battery with the source electrode of a described NMOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320277621 CN203261014U (en) | 2013-05-20 | 2013-05-20 | Lithium battery protection board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320277621 CN203261014U (en) | 2013-05-20 | 2013-05-20 | Lithium battery protection board |
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| CN203261014U true CN203261014U (en) | 2013-10-30 |
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| CN 201320277621 Expired - Fee Related CN203261014U (en) | 2013-05-20 | 2013-05-20 | Lithium battery protection board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109121442A (en) * | 2016-04-08 | 2019-01-01 | 株式会社村田制作所 | Battery module and cell apparatus |
-
2013
- 2013-05-20 CN CN 201320277621 patent/CN203261014U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109121442A (en) * | 2016-04-08 | 2019-01-01 | 株式会社村田制作所 | Battery module and cell apparatus |
| CN109121442B (en) * | 2016-04-08 | 2021-07-09 | 株式会社村田制作所 | Battery module and battery device |
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Granted publication date: 20131030 Termination date: 20210520 |
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| CF01 | Termination of patent right due to non-payment of annual fee |