CN209419240U - A kind of lithium battery charging device of more control modes - Google Patents
A kind of lithium battery charging device of more control modes Download PDFInfo
- Publication number
- CN209419240U CN209419240U CN201821726268.3U CN201821726268U CN209419240U CN 209419240 U CN209419240 U CN 209419240U CN 201821726268 U CN201821726268 U CN 201821726268U CN 209419240 U CN209419240 U CN 209419240U
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- China
- Prior art keywords
- circuit
- lithium battery
- voltage
- control circuit
- charging
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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.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A kind of lithium battery charging device of more control modes belongs to battery charging field；The charging unit is codetermined the duty ratio of the PWM of Master control chip SG3525 generation by most big end voltage control mode, temperature control mode, timing controlled mode, to control the charge mode of lithium battery；Timing control circuit is made of timing circuit, and timing output signal is connected with Master control chip SG3525；Most big end voltage control circuit compares battery charging most big end voltage with setting value, and voltage comparator circuit is connect with main control chip；Temperature-control circuit with ambient temperature compensation measures battery surface temperature, the situation for preventing temperature caused by over-charging of battery excessively high.The lithium battery charging device of the utility model solves in charging process the problems such as easily overcharging, undercharge, excessive fever, and several charging modes are combined, so that entire lithium battery charging device accuracy is high, safe and reliable.
Description
Technical field
A kind of combination most big end voltage control mode, temperature control mode, timing controlled mode charge to lithium battery
Device belong to battery charging field, it is particularly applicable to charge to lithium battery.
Background technique
In terms of lithium battery charging, most of existing charging unit is first using constant current fast charge mode, Kuai Daochong
There are one for the method for the control charge mode conversion for using constant pressure trickle charge mode when full, but using in common charging unit
It is a little insufficient.In common charging unit, most big end voltage control mode is less scientific.Because the battery of every kind of specification it is fully charged with
End voltage afterwards is not quite similar, and overcharges or charge less it is possible that will cause；Although timing controlled mode can fill very full, and
And will not overcharge, but need every time to be finished battery capacity and charge again to it；Temperature control mode must use biggish
Charging current could generate apparent fever, otherwise control influence that is not sensitive enough, and also suffering from environment temperature, but fill
Electricity fever is excessively high to hurt battery life very much, and has actually just been in overcharge condition in adstante febre battery；Negative increment control
Mode processed is only just obvious in large current charge, but high current is not ideal charging modes, and every kind of battery is negative
Increment is different, and also less stable is detected to it.If can't detect, battery will be overcharged, and be allowed to damage or be exploded.Common
The method itself that charge mode is converted is controlled in charging unit, and there is defects, it is difficult to realize the safe and efficient, smart of lithium battery
Quasi- smoothly charging.
Summary of the invention
In order to solve, charging accuracy present in lithium battery charging process is poor, stability is not high, there are security risks etc. to ask
Topic, the utility model charging unit combines most big end voltage control mode, temperature control mode, timing controlled mode, to charging
Lithium battery end voltage and battery shell temperature in the process is monitored.Lithium battery is controlled by single-chip microcontroller timing control circuit
Charging time, by monitoring lithium battery temperature in charging process, co- controlling lithium battery with the temperature sensor on lithium battery surface
Charge mode.To realizing that charging unit stability is good, the characteristics of precision is high, high safety.
The utility model charging unit solves technical solution used by its technical problem: a kind of lithium of more control modes
Battery charger, it is characterised in that: include most big end voltage control circuit (1), temperature-control circuit (2), timing controlled electricity
Road (3), using SG3525 chip as the main control circuit (4) of core, charging main circuit (5)；The most big end voltage control circuit
It (1) include lithium battery end voltage collection circuit (101) and end voltage comparator circuit (102)；Temperature-control circuit (2) includes temperature
Acquisition Circuit (201), voltage conversion circuit (202) and conversion voltage comparator circuit (203)；Main control circuit (4) includes concussion
Circuit (401), voltage sampling circuit (402), with reference to bleeder circuit (403), constant-current circuit (404), driving circuit (405) and
Under-voltage protecting circuit (406)；Charging main circuit (5) include input buffer circuit (501), input rectifying filter circuit (502),
DC/DC translation circuit (503) and output filter circuit (504)；The battery-end connects lithium battery end voltage collection circuit
(101), collected lithium battery end voltage be connected to end voltage comparator circuit (102), end voltage comparator circuit (102) output with
Main control circuit (4) is connected；Temperature collection circuit (201) monitors lithium battery surface temperature, converts through voltage conversion circuit (202)
Conversion voltage comparator circuit (203), conversion voltage comparator circuit (203) output and main control circuit (4) phase are connected to for voltage
Even；Timing control circuit (3) is connect with main control circuit (4)；Lithium battery connects voltage sampling circuit (402) and under-voltage protection electricity
Road (406)；Output filter circuit (504) is connect with constant-current circuit (404)；Main control circuit generates pwm signal through driving circuit
(405) DC/DC translation circuit (503) are controlled, passes through DC/DC translation circuit (503) and main control circuit (4) co- controlling lithium electricity
The charge mode in pond.
The beneficial outcomes of the utility model are: combining most big end voltage control mode, temperature control mode, timing controlled
The lithium battery charging device of mode can accurately control the charge mode of lithium battery, meet wanting for national lithium battery rechargeable standard
It asks.Due to combining several charge control methods, so that the precision of whole device is high, stability is good, high safety.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the general frame of the utility model.1. most big end voltage control circuit in figure, 2. temperature-control circuits, 3.
Timing control circuit, 4. main control circuits, 5. charging main circuits.
Fig. 2 is the functional diagram of the utility model.101. lithium battery end voltage collection circuit in figure, 102. end voltages are more electric
Road, 201. temperature collection circuits, 202. voltage conversion circuits, 203. conversion voltage comparator circuits, 3. timing control circuits, 4 is main
Control circuit, 401. oscillating circuits, 402. voltage sampling circuits, 403. refer to bleeder circuit, and 405. driving circuits, 406. is under-voltage
Protect circuit, 501. input buffer circuits, 502. input rectifying filter circuits, 503.DC/DC translation circuit, 504. output filtering
Circuit.
Fig. 3 is schematic diagram in kind in temperature-control circuit.204. thermistor RT1 and 205. thermistor RT2 in figure,
204. thermistor RT1 detect lithium battery itself charging temperature, are located inside charging unit, connect with lithium battery body surface.205.
Thermistor RT2 detects environment temperature, and outside charging unit, exposure is in the environment.
Fig. 4 is the model schematic of the utility model.The specific structure of the utility model is illustrated in figure.
Specific embodiment
To keep the purpose of this utility model, technical scheme and beneficial effects clearer, below in conjunction with the utility model
Embodiment carries out complete, clearly description to the technical solution in the utility model.Embodiments described below is that this is practical
Novel a part of the embodiment, rather than whole embodiments, based on the embodiments of the present invention, ordinary skill people
Every other embodiment obtained belongs to scope of protection of the utility model to member without making creative work.
In the embodiment of lithium battery charging, as shown in Figure 1, the major part of device has most big end voltage control electricity
Road (1), temperature-control circuit (2), timing control circuit (3), using SG3525 chip as the main control circuit (4) of core, charging
Main circuit (5).Charging main circuit (5) carries out power conversion, and the alternating current 220V alternating current of input is passed through input buffer circuit (501)
After input rectifying filter circuit (502), lithium battery is given by DC/DC translation circuit (503) and output filter circuit (504)
It charges.Charge mode be work under constant current fast charge mode or work under constant pressure trickle charge mode, by with
SG3525 chip is that the main control circuit (4) of core determines.The implementation of functions, as shown in Figure 2.
It is influenced to eliminate environment, corresponding adjustment is done to temperature control mode in charging unit, using temperature rise control methods.
If started to charge, electric current is slightly larger, and lithium battery will start to generate heat in the latter stage of charging.Standard charging week is especially spent
Fever after phase can sharply increase, and after the temperature rise of battery reaches specified value, stop quick charge immediately.In order to realize temperature rise
Control, using thermistor RT1 (204) and thermistor RT2 (205).Thermistor RT1 (204) detection lithium battery itself fills
Electro-temperature is located inside charging unit, connect with lithium battery body surface.Thermistor RT2 (205) detects environment temperature, is charging
Outside device, exposure is in the environment.When lithium battery reaches latter stage of charging and sharply increases own temperature, two thermistors
The temperature difference can also sharply increase, and be more than to convert constant pressure trickle charge mode for quick constant current charging mode after regulation temperature rise value.Temperature
It is as shown in Figure 3 to spend schematic diagram in kind in control circuit.
Different lithium battery individuals can also generate interference, the work in manufacturing process due to charge rate difference, environment temperature
Skill is also different and makes the maximum charging voltage of different lithium batteries there may be differences.In order to avoid under-voltage charging causes battery to damage
It is bad, when at single lithium battery end, voltage is not up to 2.5V, under-voltage protecting circuit (406) output high level to main control circuit (4),
Make the output locking of SG3525 chip, lithium battery is forbidden to charge.And after single lithium battery end voltage reaches 2.5V, external charging electricity
Stream be maintained for it is constant, into quick constant-current charging phase.After single lithium battery end voltage reaches 4.2V, outer end voltage is maintained for
It is constant, into the trickle constant pressure trickle charge stage.In order to solve the problems, such as that lithium battery most significant end voltage has differences, can first set
Threshold value of the 2.5V voltage value as quick charge voltage resets 4.2V voltage for charging peak, when single lithium battery end
Timing control circuit (3) starts timing when voltage reaches quick charge threshold value 2.5V, carries out the quick charge stage.Pass through maximum
End voltage control mode (1), temperature control mode (2) and timing controlled mode (3) combine, when meeting charging end voltage highest
Value reach, temperature rise provide maximum value arrival or timing control circuit timing arrival in any condition when, stop
Only fast charge mode is transferred to trickle charge mode.When timing, charging end voltage peak, maximum temperature rise value are discontented
When sufficient, continue to keep fast charge mode.
Main circuit control chip in charging unit selects the SG3525 chip for not only having constant pressure ring but also having constant current ring, leads to
The judgement to most big end voltage, timing and each condition of maximum temperature rise is crossed, makes charging circuit work in fast charge mode
Or trickle charge mode.The model schematic of whole device is as shown in Figure 4.
After when lithium battery end, voltage reaches 2.5V, start to be timed using timing control circuit (3), when timing arrives
After reaching, timing control circuit (3) exports high level.Device exits constant current fast charge operating mode, into constant pressure operating mode, lithium electricity
Pond charging current is gradually reduced, and lithium battery is in trickle charge mode.After when lithium battery end, voltage reaches maximum charging voltage,
SG3525 chip directly exits constant current charging mode by internal constant-current source pull-up, by voltage sampling circuit (402) into
Enter constant-voltage charge mode.After exiting constant current charging mode, lithium battery charging end voltage stabilization, charging current can be gradually reduced, into
Enter trickle charge mode.In temperature-control circuit (2), using the sensor with posive temperature coefficient thermistor to charging process
In temperature be monitored, when temperature rise be more than setting maximum value when, thermo-sensitive resistor voltage increase, then convert voltage comparator circuit
(203) high level is exported in, device exits constant current mode, enters constant pressure operating mode by voltage sampling circuit (402).
Claims (1)
1. a kind of lithium battery charging device of more control modes, it is characterised in that: include most big end voltage control circuit (1), temperature
It spends control circuit (2), timing control circuit (3), using SG3525 chip as the main control circuit (4) of core, charging main circuit
(5)；The most big end voltage control circuit (1) includes lithium battery end voltage collection circuit (101) and end voltage comparator circuit
(102)；Temperature-control circuit (2) includes that temperature collection circuit (201), voltage conversion circuit (202) and conversion voltage are more electric
Road (203)；Main control circuit (4) includes oscillating circuit (401), voltage sampling circuit (402), with reference to bleeder circuit (403), perseverance
Current circuit (404), driving circuit (405) and under-voltage protecting circuit (406)；Charging main circuit (5) includes input buffer circuit
(501), input rectifying filter circuit (502), DC/DC translation circuit (503) and output filter circuit (504)；The battery
End connection lithium battery end voltage collection circuit (101), collected lithium battery end voltage are connected to end voltage comparator circuit
(102), end voltage comparator circuit (102) output is connected with main control circuit (4)；Temperature collection circuit (201) monitors lithium battery
Surface temperature is converted into voltage through voltage conversion circuit (202) and is connected to conversion voltage comparator circuit (203), converts voltage ratio
It exports compared with circuit (203) and is connected with main control circuit (4)；Timing control circuit (3) is connect with main control circuit (4)；Lithium battery
Connect voltage sampling circuit (402) and under-voltage protecting circuit (406)；Output filter circuit (504) and constant-current circuit (404) are even
It connects；Main control circuit generates pwm signal and controls DC/DC translation circuit (503) through driving circuit (405), converts electricity by DC/DC
The charge mode on road (503) and main control circuit (4) co- controlling lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821726268.3U CN209419240U (en) | 2018-10-24 | 2018-10-24 | A kind of lithium battery charging device of more control modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821726268.3U CN209419240U (en) | 2018-10-24 | 2018-10-24 | A kind of lithium battery charging device of more control modes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209419240U true CN209419240U (en) | 2019-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821726268.3U Expired - Fee Related CN209419240U (en) | 2018-10-24 | 2018-10-24 | A kind of lithium battery charging device of more control modes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640676A (en) * | 2021-06-23 | 2021-11-12 | 宁波维科电池有限公司 | Method and system for testing self-discharge of battery cell |
-
2018
- 2018-10-24 CN CN201821726268.3U patent/CN209419240U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640676A (en) * | 2021-06-23 | 2021-11-12 | 宁波维科电池有限公司 | Method and system for testing self-discharge of battery cell |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190920 Termination date: 20201024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |