CN203607907U - Charging device suitable for four-tandem lithium-ion battery - Google Patents
Charging device suitable for four-tandem lithium-ion battery Download PDFInfo
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- CN203607907U CN203607907U CN201320802855.7U CN201320802855U CN203607907U CN 203607907 U CN203607907 U CN 203607907U CN 201320802855 U CN201320802855 U CN 201320802855U CN 203607907 U CN203607907 U CN 203607907U
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- charging
- lithium ion
- divider resistance
- electrical connection
- voltage
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- 238000007600 charging Methods 0.000 title claims abstract description 117
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 76
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000001514 detection method Methods 0.000 claims abstract description 18
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 11
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model belongs to the technical field of lithium-ion battery charging, and discloses a charging device suitable for a four-tandem lithium-ion battery. The charging device suitable for the four-tandem lithium-ion battery comprises n packs of four-tandem lithium-ion batteries, an AC-DC switch power supply and a voltage-stabilizing circuit. The charging device also comprises a BQ2000 charging management chip, a charging drive circuit and a charging rectification circuit which are electrically connected in turn. The VCC end of the BQ2000 charging management chip is electrically connected with the output end of the voltage-stabilizing circuit. The output end of the charging rectification circuit is electrically connected with the multi-pack four-tandem lithium-ion batteries which are provided with a charging voltage detection circuit and a lithium-ion battery quantity detection circuit. The output end of the charging voltage detection circuit is electrically connected with the BAT end of the BQ2000 charging management chip.
Description
Technical field
The utility model belongs to lithium ion cell charging technical field, particularly a kind of charging device that is applicable to four string lithium ion batteries.
Background technology
At present, lithium ion battery (Li-ion battery) is as a kind of novel DC power supply, be widely used in the accumulation power supply systems such as waterpower, firepower, wind-force and solar power station, and be applicable to multiple fields such as electric tool, electric bicycle, battery-operated motor cycle, electric automobile, military equipment, Aero-Space.But for example, for the larger power consumption equipment of some capacity (Shortwave Communication System power supply station needs Li-ion battery capacity to be generally 6Ah-10Ah), the charging interval of lithium battery is longer, has affected the operation and maintenance of lithium battery.
Utility model content
The purpose of this utility model is to propose a kind of charging device that is applicable to four string lithium ion batteries.This charging device that is applicable to four string lithium ion batteries can, by the sampling to battery access quantity, be controlled charging current, realizes the automatic switchover to charging current.
For realizing above-mentioned technical purpose, the utility model adopts following technical scheme to be achieved.
A kind of charging device that is applicable to four string lithium ion batteries, comprise that the 1st group of four string lithium ion battery to the n that need to charge organizes four string lithium ion batteries, n gets 1 to 6, also comprise: for 220V alternating current being changed into the galvanic AC-DC Switching Power Supply of 24V, and for 24V direct current being changed into the galvanic voltage stabilizing circuit of 5V, also comprise the BQ2000 charging management chip of electrical connection successively, charging drive circuit, charging rectifier circuit, the output of the described voltage stabilizing circuit of VCC end electrical connection of described BQ2000 charging management chip, the many groups of output electrical connection four string lithium ion batteries of described charging rectifier circuit, on described many groups four string lithium ion batteries, be provided with charging voltage testing circuit and lithium ion battery amount detection circuit, the BAT end of the output electrical connection BQ2000 charging management chip of described charging voltage testing circuit,
Described lithium ion battery amount detection circuit comprises: the 1st divider resistance to the 7 divider resistances, voltage comparator, triode and sample resistance, one end access 24V direct current of described the 7th divider resistance, the common node electrical connection other end of the 7th divider resistance and the common node of voltage comparator inverting input of one end of described the 1st divider resistance to the six divider resistances, the negative electricity of described i group four string ion lithium batteries connects the other end of i divider resistance, and i gets 1 to n; The output of the base stage electrical connection voltage comparator of described triode, the grounded emitter of described triode, one end of the collector electrode electrical connection sample resistance of described triode, the SNS end of the other end electrical connection BQ2000 charging management chip of described sample resistance.
Feature of the present utility model and further improvement are:
The LED end of described BQ2000 charging management chip is electrically connected with light-emitting diode.
The resistance value of described the 1st divider resistance to the 6 divider resistances is 300k Ω, and the resistance value of described the 7th divider resistance is 100k Ω.
The reference voltage of described voltage comparator is 12.2V～12.5V.
The beneficial effects of the utility model are: can, by the sampling to battery access quantity, control charging current, realize the automatic switchover to charging current.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of a kind of charging device that is applicable to four string lithium ion batteries of the present utility model;
Fig. 2 is the structural representation of the lithium ion battery amount detection circuit of the charging device of six group of four string lithium ion battery of the utility model embodiment;
Fig. 3 is the structural representation of the lithium ion battery amount detection circuit of the charging device of three group of four string lithium ion battery of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to Fig. 1, it is the electrical block diagram of a kind of charging device that is applicable to four string lithium ion batteries of the present utility model.Below the charging device that is applicable to four string lithium ion batteries is described, in the utility model embodiment, each is organized four string lithium ion batteries and is in series by the single lithium ion battery of four same model, each is organized four string lithium ion batteries and has a positive pole and a negative pole, the ceiling voltage of each lithium ion battery is 4.2V, and therefore each ceiling voltage of organizing four string lithium ion batteries is 16.8V.In the utility model embodiment, this charging device that is applicable to four string lithium ion batteries comprises: AC-DC Switching Power Supply and voltage stabilizing circuit, wherein, the input voltage of AC-DC Switching Power Supply is AC220V, output voltage is DC24V, and AC-DC Switching Power Supply has that conversion efficiency is high, output voltage stabilization, feature that volume is little.Voltage stabilizing circuit is for changing 24V direct current into 5V direct current.In the utility model embodiment, needing four string lithium ion batteries of charging is n group: the 1st group of four string lithium ion battery to the n organizes four string lithium ion batteries, and n gets 1 to 6.In the utility model embodiment, organize four string lithium ion batteries for each, adopt three core cradles to connect each and organize four string lithium ion batteries, by the earth terminal of three core cradles and negative pole end short circuit, then by the negative pole of one group of four corresponding earth terminal electrical connection string lithium ion battery, by the positive pole of one group of four corresponding positive terminal electrical connection string lithium ion battery.
The charging device that is applicable to four string lithium ion batteries of the present utility model is also provided with BQ2000 charging management chip, and BQ2000 charging management chip adopts high-frequency switch circuit structure, can be used for the safe charging of lithium ion battery.BQ2000 charging management chip has been considered the charge characteristic of lithium ion battery comprehensively fully, makes charger for lithium ion battery have easy to usely with it, and dependable performance, can be effectively to li-ion cell protection, the features such as charging.BQ2000 charging management chip can with first constant current again the mode of constant voltage charge to lithium ion battery.In the utility model embodiment, the peripheral circuit matching with BQ2000 charging management chip comprises charging drive circuit, charging rectifier circuit, charging voltage testing circuit and lithium ion battery amount detection circuit.Wherein, the output of the VCC end electrical connection voltage stabilizing circuit of BQ2000 charging management chip, like this, BQ2000 charging management chip can obtain power supply.The input of the MOD end electrical connection charging drive circuit of BQ2000 charging management chip, the input of the output electrical connection charging rectifier circuit of charging drive circuit, the output of charging rectifier circuit is electrically connected six group of four series lithium battery.The MOD end of BQ2000 charging management chip produces charging pulse signal, complete our required charging pulse width by charging drive circuit (buck switching-type regulator), charging drive circuit is made up of triode and powerful field effect transistor, and then through charging rectifier circuit, battery is charged.Charging rectifier circuit is made up of diode and inductance.Charging voltage testing circuit and lithium ion battery amount detection circuit are all arranged on many groups four string lithium ion batteries, and in the time of many groups of four series lithium battery chargings, charging voltage testing circuit is for detection of the charging voltage of many groups four series lithium batteries.Wherein, the BAT end of the output electrical connection BQ2000 charging management chip of charging voltage testing circuit, for feeding back to BQ2000 charging management chip by the charging voltage value detecting.The SNS end of the output electrical connection BQ2000 charging management chip of lithium ion battery amount detection circuit, for feeding back to BQ2000 charging management chip by the signal of telecommunication detecting.BQ2000 charging management chip, according to the data of receiving, is held charging process is controlled by MOD.
In the utility model embodiment, the TS end electrical connection battery temperature testing circuit of BQ2000 charging management chip, for carrying out temperature detection to the lithium ion battery charging.Voltage stabilizing circuit exports 5V direct current to BQ2000 charging management chip, BQ2000 charging management chip starts, then hold the temperature of detection multi-string lithium ion battery whether normal by TS, if normal, carry out following charging process: the first first step, the first step: carry out constant current charge, hold and produce charging pulse signal by MOD, carry out constant current charge by charging drive circuit and charging rectifier circuit; Meanwhile, hold and detect each charging voltage of organizing four string lithium ion batteries and whether reach 16.6V by BAT, if reached, carry out second step.Second step: adopt constant voltage charging method to charge.
With reference to Fig. 2, it is the structural representation of the lithium ion battery amount detection circuit of the charging device of six group of four string lithium ion battery of the utility model embodiment.With reference to Fig. 3, it is the structural representation of the lithium ion battery amount detection circuit of the charging device of three group of four string lithium ion battery of the utility model embodiment.In the utility model embodiment, above-mentioned lithium ion battery amount detection circuit comprises: the 1st divider resistance R1 to the 7 divider resistance R7, voltage comparator, triode and sample resistance, one end access 24V direct current of the 7th divider resistance R7, the common node electrical connection other end of the 7th divider resistance R7 and the common node of voltage comparator inverting input of one end of the 1st divider resistance R1 to the six divider resistance R6, the negative electricity of i group four string ion lithium batteries connects the other end of i divider resistance, and i gets 1 to n.The in-phase input end of voltage comparator is for accessing fixing reference voltage.For example, in conjunction with Fig. 2, if need to six group of four string lithium ion battery be charged (now, n=6) simultaneously, the corresponding electrical connection of the negative pole of 6 group of four string lithium ion battery of the 1st group of four string lithium ion battery to the 1st divider resistance R1 to the 6 divider resistance R6.In conjunction with Fig. 3, if need to 3 group of four string lithium ion battery be charged (now, n=3) simultaneously, the corresponding electrical connection of the negative pole of 3 group of four string lithium ion battery of the 1st group of four string lithium ion battery to the 1st divider resistance R1 to the 3 divider resistance R3.The input voltage of one end of the 7th divider resistance R7 is fixed (being always 24V), and the resistance of the 1st divider resistance R1 to the 7 divider resistance R7 is fixed, like this, in the time that n gets two different numerical value, according to principles such as electric resistance partial pressure relations, the magnitude of voltage that is input to voltage comparator by six divider resistances (the 1st divider resistance R1 to the six divider resistance R6) is just different.In the utility model embodiment, the resistance of the 7th divider resistance is 100k Ω, the resistance of the 1st divider resistance R1 to the six divider resistance R6 is 300k Ω, the reference voltage of voltage comparator is between 12.2V to 12.5V, like this, in the time of n≤3, above-mentionedly pass through the voltage (being the input voltage of voltage comparator inverting input) that six divider resistances (the 1st divider resistance R1 to the six divider resistance R6) are input to voltage comparator and be less than reference voltage (being the input voltage of voltage comparator in-phase input end), in the time of 4≤n≤6, above-mentionedly pass through the voltage (being the input voltage of voltage comparator inverting input) that six divider resistances (the 1st divider resistance R1 to the six divider resistance R6) are input to voltage comparator and be greater than reference voltage (being the input voltage of voltage comparator in-phase input end).According to the operation principle of voltage comparator, in above-mentioned two situations, voltage comparator can be exported respectively high level signal and low level signal.
In the utility model embodiment, the output of the base stage electrical connection voltage comparator of triode, the grounded emitter of triode, one end of the collector electrode electrical connection sample resistance of triode, the SNS end of the other end electrical connection BQ2000 charging management chip of described sample resistance.According to the conducting cut-off characteristics of triode, in the time of voltage comparator output high level signal, triode conducting, now, the SNS end of BQ2000 charging management chip can receive current signal, the MOD end of BQ2000 charging management chip carries out fast mold filling formula charging by charging drive circuit, charging rectifier circuit to four series lithium batteries, and now charging current is 2A.In the time of voltage comparator output low level signal, triode cut-off, now, the SNS end of BQ2000 charging management chip can not receive current signal, the MOD end of BQ2000 charging management chip carries out the charging of trickle charge pattern by charging drive circuit, charging rectifier circuit to four series lithium batteries, and now charging current is 1A.Hence one can see that, and the utility model can, according to the difference of four series lithium battery group numbers, be realized the automatic switchover of charging current.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (4)
1. one kind is applicable to the charging device of four string lithium ion batteries, comprise that the 1st group of four string lithium ion battery to the n that need to charge organizes four string lithium ion batteries, n gets 1 to 6, it is characterized in that, also comprise: for 220V alternating current being changed into the galvanic AC-DC Switching Power Supply of 24V, and for 24V direct current being changed into the galvanic voltage stabilizing circuit of 5V, also comprise the BQ2000 charging management chip of electrical connection successively, charging drive circuit, charging rectifier circuit, the output of the described voltage stabilizing circuit of VCC end electrical connection of described BQ2000 charging management chip, the many groups of output electrical connection four string lithium ion batteries of described charging rectifier circuit, on described many groups four string lithium ion batteries, be provided with charging voltage testing circuit and lithium ion battery amount detection circuit, the BAT end of the output electrical connection BQ2000 charging management chip of described charging voltage testing circuit,
Described lithium ion battery amount detection circuit comprises: the 1st divider resistance (R1) is to the 7th divider resistance (R7), voltage comparator, triode and sample resistance, one end access 24V direct current of described the 7th divider resistance (R7), described the 1st divider resistance (R1) is to common node electrical connection the 7th other end of divider resistance (R7) and the common node of voltage comparator inverting input of one end of the 6th divider resistance (R6), the negative electricity of described i group four string ion lithium batteries connects the other end of i divider resistance, and i gets 1 to n; The output of the base stage electrical connection voltage comparator of described triode, the grounded emitter of described triode, one end of the collector electrode electrical connection sample resistance of described triode, the SNS end of the other end electrical connection BQ2000 charging management chip of described sample resistance.
2. a kind of charging device that is applicable to four string lithium ion batteries as claimed in claim 1, is characterized in that, the LED end of described BQ2000 charging management chip is electrically connected with light-emitting diode.
3. a kind of charging device that is applicable to four string lithium ion batteries as claimed in claim 1, it is characterized in that, described the 1st divider resistance (R1) is 300k Ω to the resistance value of the 6th divider resistance (R6), and the resistance value of described the 7th divider resistance (R7) is 100k Ω.
4. a kind of charging device that is applicable to four string lithium ion batteries as claimed in claim 1, is characterized in that, the reference voltage of described voltage comparator is 12.2V～12.5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320802855.7U CN203607907U (en) | 2013-12-06 | 2013-12-06 | Charging device suitable for four-tandem lithium-ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320802855.7U CN203607907U (en) | 2013-12-06 | 2013-12-06 | Charging device suitable for four-tandem lithium-ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN203607907U true CN203607907U (en) | 2014-05-21 |
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| CN201320802855.7U Expired - Lifetime CN203607907U (en) | 2013-12-06 | 2013-12-06 | Charging device suitable for four-tandem lithium-ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093123A (en) * | 2015-07-20 | 2015-11-25 | 华为技术有限公司 | Method and apparatus for determining quantity of storage batteries in storage battery pack |
-
2013
- 2013-12-06 CN CN201320802855.7U patent/CN203607907U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093123A (en) * | 2015-07-20 | 2015-11-25 | 华为技术有限公司 | Method and apparatus for determining quantity of storage batteries in storage battery pack |
| CN105093123B (en) * | 2015-07-20 | 2018-07-03 | 华为技术有限公司 | Accumulator number determination method and device in a kind of accumulator group |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |
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| CX01 | Expiry of patent term |