CN207504601U - Lithium battery multiple protective circuit - Google Patents
Lithium battery multiple protective circuit Download PDFInfo
- Publication number
- CN207504601U CN207504601U CN201721349965.7U CN201721349965U CN207504601U CN 207504601 U CN207504601 U CN 207504601U CN 201721349965 U CN201721349965 U CN 201721349965U CN 207504601 U CN207504601 U CN 207504601U
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- China
- Prior art keywords
- unit
- lithium battery
- electrically connected
- protection circuit
- oxide
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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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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 72
- 230000001681 protective effect Effects 0.000 title claims abstract description 20
- 239000004065 semiconductor Substances 0.000 claims description 46
- 230000005611 electricity Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of lithium battery multiple protective circuits; it includes power supply unit, rectifier diode unit, first class of protection circuit unit and safe secondary protection circuit unit; the anode tap of the rectifier diode unit is electrically connected power supply unit positive terminal; an input terminal at lithium battery anode end, an input terminal of first class of protection circuit unit and safe secondary protection circuit unit, another input terminal of the first class of protection circuit unit and another input end grounding of safe secondary protection circuit unit is electrically connected in the cathode terminal of the rectifier diode unit；The test side of the power supply unit negative pole end and first class of protection circuit unit is electrically connected; the output terminal of the first class of protection circuit unit is electrically connected the test side of safe secondary protection circuit unit, and the output terminal of the safe secondary protection circuit unit is electrically connected cathode of lithium battery end.The duplicate protection that the utility model realization overcharges lithium battery, it is simple in structure, improve lithium battery service life.
Description
Technical field
The utility model is related to consumer electronics field, more particularly, to a kind of lithium battery multiple protective circuit.
Background technology
Substance protection circuit is fairly simple, and defencive function power is limited, if substance shielding failure cannot effective protection lithium
Battery has larger impact to service life of lithium battery, and What is more can generate safety problem, and consumer is damaged.
Utility model content
Based on this, it is necessary to for above-mentioned background technology there are the problem of, a kind of lithium battery multiple protective circuit is provided, is changed
Become existing separately protected charging modes, it is simple in structure, it can charge to single lithium battery and carry out multiple protective.
To achieve the above object, the utility model discloses a kind of lithium battery multiple protective circuit, including power supply unit,
Rectifier diode unit, first class of protection circuit unit and safe secondary protection circuit unit, the anode tap of the rectifier diode unit
Power supply unit positive terminal is electrically connected, lithium battery anode end, one is electrically connected in the cathode terminal of the rectifier diode unit
Grade protection circuit unit an input terminal and safe secondary protection circuit unit an input terminal, the first class of protection circuit unit it is another
Another input end grounding of one input terminal and safe secondary protection circuit unit；The power supply unit negative pole end and first class of protection circuit list
The test side of member is electrically connected, and the output terminal of the first class of protection circuit unit is electrically connected the detection of safe secondary protection circuit unit
End, the output terminal of the safe secondary protection circuit unit are electrically connected cathode of lithium battery end.
The first class of protection circuit unit includes the first chip unit, first resistor and the in one of the embodiments,
One metal-oxide-semiconductor, the power supply unit negative pole end is electrically connected by the voltage detecting end of first resistor and the first chip unit, described
The voltage output end of first chip unit is electrically connected the grid of the first metal-oxide-semiconductor, and the source electrode of first metal-oxide-semiconductor is electrically connected electricity
The negative pole end of source unit, the drain electrode of first metal-oxide-semiconductor are electrically connected the test side of safe secondary protection circuit unit；The lithium battery
Positive terminal is electrically connected by the positive terminal of second resistance and the first chip unit, the cathode of lithium battery end and the first chip list
The negative pole end of member is electrically connected.
The first electricity is provided between the positive terminal and negative pole end of first chip unit in one of the embodiments,
Hold.
The safe secondary protection circuit unit includes the second chip unit, 3rd resistor and the in one of the embodiments,
Two metal-oxide-semiconductors, the drain electrode of a metal-oxide-semiconductor is electrically connected by 3rd resistor and the voltage detecting end of the second chip unit, described
The voltage output end of second chip unit is electrically connected the grid of the second metal-oxide-semiconductor, and the source electrode of second metal-oxide-semiconductor is electrically connected the
The drain electrode of one metal-oxide-semiconductor, the drain electrode of second metal-oxide-semiconductor are electrically connected cathode of lithium battery end, for by the electricity of the second chip unit
The voltage output of pressure output terminal charges to lithium battery；The lithium battery anode end passes through the 4th resistance and the second chip unit
Positive terminal be electrically connected, the negative pole end of the cathode of lithium battery end and the second chip unit is electrically connected.
The second electricity is provided between the positive terminal and negative pole end of second chip unit in one of the embodiments,
Hold.
It is single that decompression is provided between the drain electrode of second metal-oxide-semiconductor and cathode of lithium battery end in one of the embodiments,
Member.
The pressure unit includes the 5th resistance and the 6th resistance in parallel in one of the embodiments,.
In conclusion the utility model lithium battery multiple protective circuit is by setting the first chip unit, the second chip list
Member, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, by inside the first chip unit and the second chip unit to lithium battery charging voltage into
Row detects and sends the break-make that high level or low level come control circuit circuit to the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, realizes to lithium
The duplicate protection of over-charging of battery, it is simple in structure, improve lithium battery service life.
Description of the drawings
Fig. 1 is the schematic block circuit diagram of one embodiment of the utility model lithium battery multiple protective circuit；
Fig. 2 is the circuit diagram of the utility model lithium battery multiple protective circuit.
Specific embodiment
As depicted in figs. 1 and 2, the utility model lithium battery multiple protective circuit includes power supply unit 100, rectifier diode
Unit 200, first class of protection circuit unit 300 and safe secondary protection circuit unit 400, the power supply unit 100 are electric to provide lithium
Voltage needed for the charging of pond, the anode tap of the rectifier diode unit 200 is electrically connected 100 positive terminal of power supply unit, described whole
Stream diode 200 cathode terminal be electrically connected lithium battery anode end, first class of protection circuit unit 300 an input terminal
And an input terminal of safe secondary protection circuit unit 400, another input terminal and second class protection of the first class of protection circuit unit 300
Another input end grounding of circuit unit 400.
The test side of 100 negative pole end of power supply unit and first class of protection circuit unit 300 is electrically connected, and the level-one is protected
The output terminal of protection circuit unit 300 is electrically connected the test side of safe secondary protection circuit unit 400, the safe secondary protection circuit unit
400 output terminal is electrically connected cathode of lithium battery end.
Specifically, the first class of protection circuit unit 300 includes the first chip unit U1, first resistor R1 and the first MOS
Pipe Q1,100 negative pole end of power supply unit are electrically connected by the voltage detecting end of first resistor R1 and the first chip unit U1,
The voltage output end of the first chip unit U1 is electrically connected the grid of the first metal-oxide-semiconductor Q1, the source electrode of the first metal-oxide-semiconductor Q1
The negative pole end of power supply unit 100 is electrically connected, the drain electrode of the first metal-oxide-semiconductor Q1 is electrically connected safe secondary protection circuit unit 400
Test side；The lithium battery anode end is electrically connected by the positive terminal of second resistance R2 and the first chip unit U1, described
Cathode of lithium battery end and the negative pole end of the first chip unit U1 are electrically connected.
The first electricity is provided between the positive terminal and negative pole end of the first chip unit U1 in one of the embodiments,
Hold C1, for filtering out the interference function in the first chip unit U1 power supply circuits, play filter action.
The safe secondary protection circuit unit 400 includes the second chip unit U2,3rd resistor R3 and the second metal-oxide-semiconductor Q2, institute
The drain electrode of the first metal-oxide-semiconductor Q1 is stated by the electric connection of the voltage detecting end of 3rd resistor R3 and the second chip unit U2, described the
The voltage output end of two chip unit U2 is electrically connected the grid of the second metal-oxide-semiconductor Q2, and the source electrode of the second metal-oxide-semiconductor Q2 electrically connects
Connect the drain electrode of the first metal-oxide-semiconductor Q1, the drain electrode of the second metal-oxide-semiconductor Q2 is electrically connected cathode of lithium battery end, for by the second chip
The voltage output of the voltage output end of unit U2 charges to lithium battery；The lithium battery anode end by the 4th resistance R4 with
The positive terminal of second chip unit U2 is electrically connected, and the cathode of lithium battery end and the negative pole end of the second chip unit U2 electrically connect
It connects.
The second electricity is provided between the positive terminal and negative pole end of the second chip unit U2 in one of the embodiments,
Hold C2, for filtering out the interference function in the second chip unit U2 power supply circuits, play filter action.
In one of the embodiments, decompression is provided between the drain electrode of the second metal-oxide-semiconductor Q2 and cathode of lithium battery end
Unit 500, the pressure unit 500 include the 5th resistance R5 and the 6th resistance R6 in parallel, with to avoid lithium battery both ends electricity
It presses and bigger than normal service life of lithium battery is damaged.
During the utility model specific works, the voltage output end output high level of the first chip unit U1, the first metal-oxide-semiconductor Q1
Conducting, wherein, the output voltage values of the voltage output end of the first chip unit U1 are the threshold voltages using the first metal-oxide-semiconductor Q1 as base
Standard, by detecting the positive terminal of the first chip unit U1 and the negative pole end of the first chip unit U1 inside the first chip unit U1
Lithium battery voltage, when lithium battery both end voltage difference is slowly promoted to the voltage output terminal voltage of the first chip unit U1, the
The voltage output end output low level signal of one chip unit U1, the first metal-oxide-semiconductor Q1 cut-offs, and then realize what lithium battery was overcharged
One protects again.
Similarly, the voltage output end of the second chip unit U2 exports high level first, and the second metal-oxide-semiconductor Q2 is connected, wherein, the
The output voltage values of the voltage output end of two chip unit U2 are the second chips on the basis of the threshold voltage of the second metal-oxide-semiconductor Q2
By detecting the lithium battery voltage of the positive terminal of the second chip unit U2 and the negative pole end of the second chip unit U2 inside unit U2,
When lithium battery both end voltage difference is slowly promoted to the voltage output terminal voltage of the second chip unit U2, the second chip unit U2
Voltage output end output low level signal, the second metal-oxide-semiconductor Q2 cut-offs, and then realize the double protection that is overcharged to lithium battery, when
First chip unit U1 circuits lose overcharge protective capability after, the second chip unit U2 then plays secondary protection function, structure letter
It is single, it charges to lithium battery and carries out effective protection, improve lithium battery service life.
Wherein, the first chip unit U1 and the second chip unit U2 passes through its internal detection comparator detection chip list
The positive terminal lithium battery voltage corresponding with negative pole end of member, the positive terminal lithium corresponding with negative pole end of the second chip unit U2 detections
Corresponding with the negative pole end lithium battery voltage of positive terminal that cell voltage can be detected than the first chip unit U1 is high 0.07V；Described
The chip model of one chip unit U1 is S-8200AAY-M6T1U, and the chip model of the second chip unit U2 is S-
8211CCV-M5T1U。
In conclusion the utility model lithium battery multiple protective circuit is by setting the first chip unit U1, the second chip
Unit U2, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2, by electric to lithium inside the first chip unit U1 and the second chip unit U2
Pond charging voltage be detected and send high level or low level to the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 come control circuit return
The break-make on road realizes the duplicate protection overcharged to lithium battery, simple in structure, improves lithium battery service life.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (7)
1. a kind of lithium battery multiple protective circuit, it is characterised in that：Including power supply unit, rectifier diode unit, first class of protection
Circuit unit and safe secondary protection circuit unit, the anode tap of the rectifier diode unit are electrically connected power supply unit positive terminal,
The cathode terminal of the rectifier diode unit be electrically connected lithium battery anode end, first class of protection circuit unit an input terminal
And an input terminal of safe secondary protection circuit unit, another input terminal of the first class of protection circuit unit and safe secondary protection circuit list
Another input end grounding of member；The test side of the power supply unit negative pole end and first class of protection circuit unit is electrically connected, described
The output terminal of first class of protection circuit unit is electrically connected the test side of safe secondary protection circuit unit, the safe secondary protection circuit unit
Output terminal be electrically connected cathode of lithium battery end.
2. lithium battery multiple protective circuit according to claim 1, it is characterised in that：The first class of protection circuit unit packet
The first chip unit, first resistor and the first metal-oxide-semiconductor are included, the power supply unit negative pole end passes through first resistor and the first chip list
The voltage detecting end of member is electrically connected, and the voltage output end of first chip unit is electrically connected the grid of the first metal-oxide-semiconductor, institute
The source electrode for stating the first metal-oxide-semiconductor is electrically connected the negative pole end of power supply unit, and the drain electrode of first metal-oxide-semiconductor is electrically connected second class protection
The test side of circuit unit；The lithium battery anode end is electrically connected by the positive terminal of second resistance and the first chip unit,
The cathode of lithium battery end and the negative pole end of the first chip unit are electrically connected.
3. lithium battery multiple protective circuit according to claim 2, it is characterised in that：The anode of first chip unit
The first capacitance is provided between end and negative pole end.
4. lithium battery multiple protective circuit according to claim 2, it is characterised in that：The safe secondary protection circuit unit packet
The second chip unit, 3rd resistor and the second metal-oxide-semiconductor are included, the drain electrode of a metal-oxide-semiconductor passes through 3rd resistor and the second chip list
The voltage detecting end of member is electrically connected, and the voltage output end of second chip unit is electrically connected the grid of the second metal-oxide-semiconductor, institute
The source electrode for stating the second metal-oxide-semiconductor is electrically connected the drain electrode of the first metal-oxide-semiconductor, and the drain electrode of second metal-oxide-semiconductor is electrically connected lithium battery and bears
Extremely, for the voltage output of the voltage output end of the second chip unit to be charged to lithium battery；The lithium battery anode
End is electrically connected by the positive terminal of the 4th resistance and the second chip unit, the cathode of lithium battery end and the second chip unit
Negative pole end is electrically connected.
5. lithium battery multiple protective circuit according to claim 4, it is characterised in that：The anode of second chip unit
The second capacitance is provided between end and negative pole end.
6. lithium battery multiple protective circuit according to claim 4, it is characterised in that：The drain electrode of second metal-oxide-semiconductor with
Cathode of lithium battery is provided with pressure unit between end.
7. lithium battery multiple protective circuit according to claim 6, it is characterised in that：The pressure unit includes in parallel
5th resistance and the 6th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721349965.7U CN207504601U (en) | 2017-10-18 | 2017-10-18 | Lithium battery multiple protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721349965.7U CN207504601U (en) | 2017-10-18 | 2017-10-18 | Lithium battery multiple protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207504601U true CN207504601U (en) | 2018-06-15 |
Family
ID=62501051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721349965.7U Expired - Fee Related CN207504601U (en) | 2017-10-18 | 2017-10-18 | Lithium battery multiple protective circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207504601U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767927A (en) * | 2018-06-27 | 2018-11-06 | 杭州极速电子有限公司 | A kind of lithium battery management system |
| CN109450053A (en) * | 2019-01-02 | 2019-03-08 | 张家港华捷电子有限公司 | A kind of battery charge/discharge protection circuit |
| CN111917151A (en) * | 2020-04-13 | 2020-11-10 | 苏州泰鼎智能科技有限公司 | Lithium battery charging protection circuit |
-
2017
- 2017-10-18 CN CN201721349965.7U patent/CN207504601U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767927A (en) * | 2018-06-27 | 2018-11-06 | 杭州极速电子有限公司 | A kind of lithium battery management system |
| CN109450053A (en) * | 2019-01-02 | 2019-03-08 | 张家港华捷电子有限公司 | A kind of battery charge/discharge protection circuit |
| CN111917151A (en) * | 2020-04-13 | 2020-11-10 | 苏州泰鼎智能科技有限公司 | Lithium battery charging protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180615 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |