CN204046204U - Charge-discharge circuit - Google Patents
Charge-discharge circuit Download PDFInfo
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- CN204046204U CN204046204U CN201420305078.XU CN201420305078U CN204046204U CN 204046204 U CN204046204 U CN 204046204U CN 201420305078 U CN201420305078 U CN 201420305078U CN 204046204 U CN204046204 U CN 204046204U
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Abstract
A kind of charge-discharge circuit; comprise power circuit, protective circuit, charging circuit, discharge circuit and display electricity circuit; display electricity circuit utilizes voltage comparator chip sampled cell voltage and reference voltage to compare; electricity can be shown by display module; show battery electric quantity legibly by the simplest components and parts image, make user accurately can grasp the specifying information of dump energy.
Description
Technical field
The utility model relates to charge-discharge circuit, particularly relates to a kind of charge-discharge circuit be applied on electronic product.
Background technology
Energy shortage and environmental pollution are that world today's energy industry develops two challenging greatly of facing, therefore carry out electrokinetic cell new forms of energy very urgent.Electrokinetic cell is widely used in the live and work of the mankind, and existing commercialization secondary cell is of a great variety, as fuel cell, lead-acid battery and lithium ion battery etc.Along with social economy and scientific and technological development, the popularization of the Internet, electronic product is varied on the market now, and large-screen electronic product is fashionable whole electronic market almost, as touch-screen mobile phone, panel computer etc.The large-screen of this electronic product, multi-functional and light small and exquisite, be convenient for carrying, contemporary work personage is going on business or is going on a journey requisite trip personal effects in way.Just because of the large-screen of this kind of electronic product and multi-functional, its power consumption is quite large, it is also proposed a new challenge to battery electric quantity.And the capacity of current lithium ion battery on the market can only support at most several hours operating times, therefore, portable power source, stand-by power supply equal energy source electronic product are arisen at the historic moment.
Lithium ion battery possesses that energy density is high, power output is high, the life-span is long, efficiency for charge-discharge is high, broad application temperature range, self discharge is low, load characteristic good, good, the low internal resistance of temperature memory property, memory-less effect, quick charge can be realized, fail safe is high, reliability is high, cost is low and the feature such as reusable, become battery the most salable in the industry of current battery class, and be extensively incorporated in touch-screen mobile phone, panel computer, notebook and portable power source etc.But, some electronic products but lack the function of electricity display when discharge and recharge.
Utility model content
Based on this, provide a kind of charge-discharge circuit possessing electric quantity display function.
A kind of charge-discharge circuit, comprises power circuit, protective circuit, charging circuit, discharge circuit and display electricity circuit; The positive pole of described power circuit connects the output of described charging circuit and the input of described discharge circuit by described protective circuit, and the positive pole of described power circuit also connects the input of described display electricity circuit, the minus earth of described power circuit;
Described display electricity circuit comprises voltage comparator chip U1, display module, reference voltage module and voltage sampling module, the output of the voltage comparator of the internal independence of voltage comparator chip U1 connects display module, the in-phase input end of the voltage comparator of the internal independence of voltage comparator chip U1 is connected described reference voltage module with arbitrary input of inverting input, and another input connects described voltage sampling module.
Wherein in an embodiment, the model of described voltage comparator chip U1 is LM339.
Wherein in an embodiment, described LM339 voltage comparator chip U1 comprises supply pin VCC, grounding leg GND, homophase input pin 1IN+, homophase input pin 2IN+, homophase input pin 3IN+, homophase input pin 4IN+, anti-phase input pin 1IN-, anti-phase input pin 2IN-, anti-phase input pin 3IN-, anti-phase input pin 4IN-, output pin 1OUT, output pin 2OUT, output pin 3OUT, output pin 4OUT; Supply pin VCC as the input of described display electricity circuit, grounding leg GND ground connection;
Described display module comprises the first LED 1, second LED 2, the 3rd LED 3, the 4th LED 4, first resistor R1, the second resistor R2, the 3rd resistor R3, the 4th resistor R4;
Described reference voltage module comprises digital and Adjustable U2, the 5th resistor R5 and the first capacitor C1;
Described voltage sampling module comprises the 6th resistor R6, the 7th resistor R7, the 8th resistor R8, the 9th resistor R9, the tenth resistor R10, the 11 resistor R11, the 12 resistor R12, the 13 resistor R13;
Output pin 1OUT connects the first LED 1 positive pole by the first resistor R1, the first LED 1 minus earth; Output pin 2OUT connects the second LED 2 positive pole by the second resistor R2, the second LED 2 minus earth; Output pin 3OUT connects the 3rd LED 3 positive pole by the 3rd resistor R3, the 3rd LED 3 minus earth; Output pin 4OUT connects the 4th LED 4 positive pole by the 4th resistor R4, the 4th LED 4 minus earth;
The reference edge of digital and Adjustable U2 is connected with negative electrode, the negative electrode of digital and Adjustable U2 connects the anti-phase input pin 1IN-/2IN-/3IN-/4IN-of LM339 voltage comparator chip U1, the negative electrode of digital and Adjustable U2 also connects the supply pin VCC of LM339 voltage comparator chip U1 by the 5th resistor R5, the plus earth of digital and Adjustable U2, digital and Adjustable U2 and the first capacitor C1 is connected in parallel;
The supply pin VCC of LM339 voltage comparator chip U1 is by the 6th resistor R6 and the tenth resistor R10 ground connection, the supply pin VCC of LM339 voltage comparator chip U1 is by the 7th resistor R7 and the 11 resistor R11 ground connection, the supply pin VCC of LM339 voltage comparator chip U1 is by the 8th resistor R8 and the 12 resistor R12 ground connection, the supply pin VCC of LM339 voltage comparator chip U1 is by the 9th resistor R9 and the 13 resistor R13 ground connection, 6th resistor R6 is connected homophase input pin 1IN+ with the link of the tenth resistor R10, 7th resistor R7 is connected homophase input pin 2IN+ with the link of the 11 resistor R11, 8th resistor R8 is connected homophase input pin 3IN+ with the link of the 12 resistor R12, 9th resistor R9 is connected homophase input pin 4IN+ with the link of the 13 resistor R13.
Wherein in an embodiment, the model of described digital and Adjustable U2 is TL431.
Wherein in an embodiment, described protective circuit comprises at least one in current foldback circuit and overheating protection circuit.
Wherein in an embodiment, described current foldback circuit comprises resettable fuse, and described overheating protection circuit comprises NTC themistor.
Wherein in an embodiment, also comprise overvoltage crowbar, described overvoltage crowbar and described power circuit are connected in parallel.
Wherein in an embodiment, described overvoltage crowbar comprises the first varistor R16 and the 5th LED 5, the positive pole of described power circuit connects the positive pole of the 5th LED 5, the minus earth of the 5th LED 5 by the first varistor R16; Or the positive pole of described power circuit connects the positive pole of the 5th LED 5, the negative pole of the 5th LED 5 is by the first varistor R16 ground connection.
Wherein in an embodiment, also comprise switch, the positive pole of described power circuit is connected with described protective circuit by described switch, and the positive pole of described power circuit is connected by the input of described switch with described display electricity circuit.
Above-mentioned charge-discharge circuit, voltage comparator chip sampled cell voltage and reference voltage is utilized to compare, electricity can be shown by display module, show battery electric quantity legibly by the simplest components and parts image, make user accurately can grasp the specifying information of dump energy.
Accompanying drawing explanation
Fig. 1 is the module map of an embodiment charge-discharge circuit;
Fig. 2 is the module map of display electricity circuit;
Fig. 3 is the schematic diagram of an embodiment charge-discharge circuit.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
As shown in Figure 1, be the module map of the first embodiment charge-discharge circuit.
A kind of charge-discharge circuit, comprises power circuit 110, protective circuit 120, charging circuit 130, discharge circuit 140 and display electricity circuit 150.The positive pole of power circuit 110 connects the output of charging circuit 130 and the input of discharge circuit 140 by protective circuit 120, and the positive pole of power circuit 110 also connects the input of display electricity circuit 150, the minus earth of power circuit 110.
Fig. 2 is the module map of display electricity circuit.
Display electricity circuit 150 comprises LM339 voltage comparator chip U1, display module 151, reference voltage module 152 and voltage sampling module 153, the output OUT of the voltage comparator of the internal independence of U1 connects display module 151, the in-phase input end IN+ of the voltage comparator of the internal independence of U1 connects voltage sampling module 153, the connection reference voltage module 152 of inverting input IN-, supply pin VCC as the input of display electricity circuit 150, grounding leg GND ground connection.In other embodiments, can be the in-phase input end IN+ connection reference voltage module 152 of the voltage comparator of the internal independence of U1, the connection voltage sampling module 153 of inverting input IN-.
Above-mentioned charge-discharge circuit, the voltage of LM339 voltage comparator chip sampled battery (power circuit 110) and reference voltage is utilized to compare, electricity can be shown by display module, show battery electric quantity legibly by the simplest components and parts image, make user accurately can grasp the specifying information of dump energy.
Fig. 3 is the schematic diagram of an embodiment charge-discharge circuit, incorporated by reference to Fig. 3.
Charge-discharge circuit comprises power circuit 110 (for battery B1), K switch 1, and the positive pole of power circuit 110 is connected with protective circuit 120 by K switch 1, and the positive pole of power circuit 110 is connected by the input of K switch 1 with display electricity circuit 150.
Protective circuit 120 comprises resettable fuse R14 and NTC themistor R15, respectively as current foldback circuit and overheating protection circuit.
Resettable fuse R14 by through special processing polymer resin and be distributed in the inside conducting particles form.During normally, conducting particles is critically strapped in crystalloid conductive path by polymer resin, and resettable fuse is now low resistance state, and the heat energy that electric current circuit flowing through resettable fuse produces is little, can not change crystal structure.When circuit is short-circuited or transship, the heat that the big current flowing through resettable fuse R14 produces makes polymer resin melt, and volume increases rapidly, forms high-impedance state, and operating current can reduce rapidly, thus limits circuit and protect.When after failture evacuation, resettable fuse R14 crystallisation by cooling again, volume contraction; conducting particles forms conductive path again, and resettable fuse R14 replys as low resistance state, thus completes current limliting, the voltage-limiting protection to circuit; manually need not change, can recycle.
Thermistor R15 is then the effect whole circuit being played to overtemperature protection protection.The feature of thermistor is that sensitivity is higher, and operating temperature range is wide, and volume is little, easy to use, good stability, and overload capacity is strong.When circuit normally works, thermistor temp and room temperature is close, resistance is very little, series connection can not hinder electric current to pass through in circuit; And when there is overcurrent when circuit because fault.Thermistor R15 causes temperature to rise due to heating power increase, and when temperature exceedes switch temperature, resistance can increase severely instantaneously, and the electric current in loop can be reduced to safety value rapidly, reaches protective effect.
Display electricity circuit 150:
LM339 voltage comparator chip U1 comprises supply pin VCC, grounding leg GND, homophase input pin 1IN+, homophase input pin 2IN+, homophase input pin 3IN+, homophase input pin 4IN+, anti-phase input pin 1IN-, anti-phase input pin 2IN-, anti-phase input pin 3IN-, anti-phase input pin 4IN-, output pin 1OUT, output pin 2OUT, output pin 3OUT, output pin 4OUT.Supply pin VCC as the input of display electricity circuit 150, grounding leg GND ground connection.
Display module 151 comprises the first LED 1, second LED 2, the 3rd LED 3, the 4th LED 4, first resistor R1, the second resistor R2, the 3rd resistor R3, the 4th resistor R4.The resistance of the first resistor R1, the second resistor R2, the 3rd resistor R3, the 4th resistor R4 is all 4.7K Ω.
Reference voltage module 152 comprises digital and Adjustable U2, the 5th resistor R5 and the first capacitor C1.Digital and Adjustable U2 is TL431.The resistance of the 5th resistor R5 is 2K Ω, and the size of the first capacitor C1 is 0.1uF.
Voltage sampling module 153 comprises the 6th resistor R6, the 7th resistor R7, the 8th resistor R8, the 9th resistor R9, the tenth resistor R10, the 11 resistor R11, the 12 resistor R12, the 13 resistor R13.The resistance of the 6th resistor R6, the 7th resistor R7, the 8th resistor R8, the 9th resistor R9 is respectively 3.2K Ω, 4.4K Ω, 5.6K Ω, 6.8K Ω, and the resistance of the 11 resistor R11, the 12 resistor R12, the 13 resistor R13 is all 10K Ω.
In display module 151, the 1OUT pin of U1 connects LED1 positive pole by R1, LED1 minus earth; 2OUT connects LED2 positive pole by R2, LED2 minus earth; 3OUT connects LED3 positive pole by R3, LED3 minus earth; 4OUT connects LED4 positive pole by R4, LED4 minus earth.In other embodiments, can according to the connection of the homophase input pin (as 1IN+) of U1 and anti-phase input pin (as 1IN-), namely the connection of LED in adjustment display module 151 can be the output pin (as 1OUT) that LED positive pole connects a high level and negative pole connection U1.
The reference edge of digital and Adjustable U2 is connected with negative electrode, the negative electrode of U2 connects anti-phase input pin 1IN-, anti-phase input pin 2IN-, anti-phase input pin 3IN-, the anti-phase input pin 4IN-of U1, the negative electrode of U2 also connects the supply pin VCC of U1 by R5, the plus earth of U2, U2 and the first capacitor C1 is connected in parallel.
The supply pin VCC of U1 is by R6 and R10 ground connection, the supply pin VCC of U1 is by R7 and R11 ground connection, the supply pin VCC of U1 is by R8 and R12 ground connection, the supply pin VCC of U1 is by R9 and R13 ground connection, the link of R6 with R10 is connected 1IN+, the link of R7 with R11 is connected 2IN+, and the link of R8 with R12 is connected 3IN+, and the link of R9 with R13 is connected 4IN+.
Display electricity circuit 150 of the present utility model is that the normal phase input end of U1 adds the reference voltage module 152 of a fixed voltage, and the fixed voltage value of reference voltage module 152 is 2.5V with single supply (B1) power supply.What suppose that battery B1 in circuit adopts is Sanyo 18650 battery, the cell voltage that then electricity of 25% is corresponding is 3.3V, the cell voltage that the electricity of 50% is corresponding is 3.6V, and the cell voltage that the electricity of 75% is corresponding is 3.9V, and the cell voltage that the electricity of 100% is corresponding is 4.2V.Selected 11 resistor R11, the 12 resistor R12, the 13 resistor R13 are 10k Ω, the R6 that then electricity of 25% is corresponding is 3.2k Ω, the R7 that the electricity of 50% is corresponding is 4.4k Ω, and the R81 that the electricity of 75% is corresponding is 5.6k Ω, and the R9 that the electricity of 100% is corresponding is 6.8k Ω.When battery B1 reaches corresponding voltage, the magnitude of voltage then homophase input pin 1IN+, homophase input pin 2IN+, homophase input pin 3IN+, homophase input pin 4IN+ assigned to is 2.5V, now, LED (the first LED 1, second LED 2, the 3rd LED 3, the 4th LED 4) is bright, display electricity now.
In other embodiments, also comprise overvoltage crowbar (not shown), overvoltage crowbar and power circuit are connected in parallel.Overvoltage crowbar comprises the first varistor R16 and the 5th LED 5, and the positive pole of power circuit 110 connects the positive pole of the 5th LED 5, the minus earth of the 5th LED 5 by the first varistor R16; Or the positive pole of power circuit 110 connects the positive pole of the 5th LED 5, the negative pole of the 5th LED 5 is by the first varistor R16 ground connection.
According to the attribute of battery B1, select the varistor of different numerical value.When the first varistor R16 both end voltage is lower than nominal rated voltage value, the resistance approach infinity of the first varistor R16, inside almost no current is passed through.When the first varistor R16 both end voltage exceedes nominal rated voltage, but when not exceeding maximum deboost, piezo-resistance will puncture conducting rapidly, and become low resistive state by high-impedance state, operating current also sharply increases.First varistor R16, the 5th LED 5 of the protective circuit of the utility model belong to parallel relationship with battery B1, are parallel with the effect of dividing potential drop.When battery B1 reaches the upper voltage limit of full electricity, now also just reach the nominal voltage of the first varistor R16, the first varistor R16 conducting, then conducting is shinny too for the 5th LED 5, the full electricity of prompting.Both rationally can having ensured that battery can not overvoltage when charging, the effect of pressure limiting can have been reached again.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (9)
1. a charge-discharge circuit, is characterized in that, comprises power circuit, protective circuit, charging circuit, discharge circuit and display electricity circuit; The positive pole of described power circuit connects the output of described charging circuit and the input of described discharge circuit by described protective circuit, and the positive pole of described power circuit also connects the input of described display electricity circuit, the minus earth of described power circuit;
Described display electricity circuit comprises voltage comparator chip U1, display module, reference voltage module and voltage sampling module, the output of the voltage comparator of the internal independence of voltage comparator chip U1 connects display module, the in-phase input end of the voltage comparator of the internal independence of voltage comparator chip U1 is connected described reference voltage module with arbitrary input of inverting input, and another input connects described voltage sampling module.
2. charge-discharge circuit according to claim 1, is characterized in that, the model of described voltage comparator chip U1 is LM339.
3. charge-discharge circuit according to claim 2, is characterized in that:
Described LM339 voltage comparator chip U1 comprises supply pin VCC, grounding leg GND, homophase input pin 1IN+, homophase input pin 2IN+, homophase input pin 3IN+, homophase input pin 4IN+, anti-phase input pin 1IN-, anti-phase input pin 2IN-, anti-phase input pin 3IN-, anti-phase input pin 4IN-, output pin 1OUT, output pin 2OUT, output pin 3OUT, output pin 4OUT; Supply pin VCC as the input of described display electricity circuit, grounding leg GND ground connection;
Described display module comprises the first LED 1, second LED 2, the 3rd LED 3, the 4th LED 4, first resistor R1, the second resistor R2, the 3rd resistor R3, the 4th resistor R4;
Described reference voltage module comprises digital and Adjustable U2, the 5th resistor R5 and the first capacitor C1;
Described voltage sampling module comprises the 6th resistor R6, the 7th resistor R7, the 8th resistor R8, the 9th resistor R9, the tenth resistor R10, the 11 resistor R11, the 12 resistor R12, the 13 resistor R13;
Output pin 1OUT connects the first LED 1 positive pole by the first resistor R1, the first LED 1 minus earth; Output pin 2OUT connects the second LED 2 positive pole by the second resistor R2, the second LED 2 minus earth; Output pin 3OUT connects the 3rd LED 3 positive pole by the 3rd resistor R3, the 3rd LED 3 minus earth; Output pin 4OUT connects the 4th LED 4 positive pole by the 4th resistor R4, the 4th LED 4 minus earth;
The reference edge of digital and Adjustable U2 is connected with negative electrode, the negative electrode of digital and Adjustable U2 connects the anti-phase input pin 1IN-/2IN-/3IN-/4IN-of LM339 voltage comparator chip U1, the negative electrode of digital and Adjustable U2 also connects the supply pin VCC of LM339 voltage comparator chip U1 by the 5th resistor R5, the plus earth of digital and Adjustable U2, digital and Adjustable U2 and the first capacitor C1 is connected in parallel;
The supply pin VCC of LM339 voltage comparator chip U1 is by the 6th resistor R6 and the tenth resistor R10 ground connection, the supply pin VCC of LM339 voltage comparator chip U1 is by the 7th resistor R7 and the 11 resistor R11 ground connection, the supply pin VCC of LM339 voltage comparator chip U1 is by the 8th resistor R8 and the 12 resistor R12 ground connection, the supply pin VCC of LM339 voltage comparator chip U1 is by the 9th resistor R9 and the 13 resistor R13 ground connection, 6th resistor R6 is connected homophase input pin 1IN+ with the link of the tenth resistor R10, 7th resistor R7 is connected homophase input pin 2IN+ with the link of the 11 resistor R11, 8th resistor R8 is connected homophase input pin 3IN+ with the link of the 12 resistor R12, 9th resistor R9 is connected homophase input pin 4IN+ with the link of the 13 resistor R13.
4. charge-discharge circuit according to claim 3, is characterized in that, the model of described digital and Adjustable U2 is TL431.
5. charge-discharge circuit according to claim 1, is characterized in that, described protective circuit comprises at least one in current foldback circuit and overheating protection circuit.
6. charge-discharge circuit according to claim 5, is characterized in that, described current foldback circuit comprises resettable fuse, and described overheating protection circuit comprises NTC themistor.
7. charge-discharge circuit according to claim 1, is characterized in that, also comprises overvoltage crowbar, and described overvoltage crowbar and described power circuit are connected in parallel.
8. charge-discharge circuit according to claim 7, it is characterized in that, described overvoltage crowbar comprises the first varistor R16 and the 5th LED 5, the positive pole of described power circuit connects the positive pole of the 5th LED 5, the minus earth of the 5th LED 5 by the first varistor R16; Or the positive pole of described power circuit connects the positive pole of the 5th LED 5, the negative pole of the 5th LED 5 is by the first varistor R16 ground connection.
9. charge-discharge circuit according to claim 1; it is characterized in that; also comprise switch, the positive pole of described power circuit is connected with described protective circuit by described switch, and the positive pole of described power circuit is connected by the input of described switch with described display electricity circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305078.XU CN204046204U (en) | 2014-06-09 | 2014-06-09 | Charge-discharge circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305078.XU CN204046204U (en) | 2014-06-09 | 2014-06-09 | Charge-discharge circuit |
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| CN204046204U true CN204046204U (en) | 2014-12-24 |
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| CN201420305078.XU Expired - Fee Related CN204046204U (en) | 2014-06-09 | 2014-06-09 | Charge-discharge circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265225A (en) * | 2017-06-29 | 2017-10-20 | 上海盛蒂斯自动化设备股份有限公司 | Detector for elevator balance coefficient |
-
2014
- 2014-06-09 CN CN201420305078.XU patent/CN204046204U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265225A (en) * | 2017-06-29 | 2017-10-20 | 上海盛蒂斯自动化设备股份有限公司 | Detector for elevator balance coefficient |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20160609 |