CN202930977U - Lithium battery charger with temperature detection - Google Patents
Lithium battery charger with temperature detection Download PDFInfo
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- CN202930977U CN202930977U CN2012205549469U CN201220554946U CN202930977U CN 202930977 U CN202930977 U CN 202930977U CN 2012205549469 U CN2012205549469 U CN 2012205549469U CN 201220554946 U CN201220554946 U CN 201220554946U CN 202930977 U CN202930977 U CN 202930977U
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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Abstract
The utility model discloses a lithium battery charger with temperature detection. The lithium battery charger with temperature detection comprises a PFC circuit module, a DC/DC converter, a processor and an electric parameter detection unit. The electric parameter detection unit comprises a voltage detection unit, a current detection unit and a temperature detection unit. The voltage detection unit, the current detection unit and the temperature detection unit are arranged at the output end of the charger. The processor and the DC/DC converter are connected with the voltage detection unit, the current detection unit and the temperature detection unit. The processor and the DC/DC converter are connected with the PFC circuit module. Compared with the prior art, in a lithium battery charging process, the lithium battery charger with temperature detection carry out intelligent control, and strictly controls the parameters of charging current, voltage, temperature and the like, thus the charging efficiency is improved, and the characteristics of digitization, intelligentization and the like are realized. Through temperature monitoring, the effect of temperature on battery capacity is controlled in a certain range.
Description
Technical field
The utility model relates to a kind of lithium battery charger with temperature detection.
Background technology
The characteristics such as voltage is high because having for lithium battery, good cycle and memory-less effect are just being paid close attention to by people as the core energy storage device of mobile portable instrument, and the lithium battery charger that is complementary is with it also more and more paid attention to by people, because the quality of charger can affect the performance of instrument and equipment, the useful life of battery and the operating efficiency of equipment.At present, comparatively typical one type of charger on the market is to control the variation of charging current, voltage with an integrated IC of special use, although the charger chip volume of this charging modes is less, but the some shortcomings part is also arranged, and it is low etc. that as low in charge efficiency, easy heating reduces battery life, control precision.Scientific paper proposes to add the temperature protection module, but is all the heating problem for the IC chip, and this is also a drawback using integrated IC to bring.
Chinese patent application number: 200610159900.6, patent name is: " charge control method of lithium battery ", open day for the patent of invention of 2008.5.14, a kind of charge control method of lithium battery is disclosed, this control method is as follows: in the lithium cell charging process, utilize voltage detecting circuit constantly to detect the electric weight of lithium battery, select the needed charging modes of lithium battery, then by the PWM modulation function in microprocessor, electric power signal is adjusted to suitable constant current or the constant voltage value is charged.But this technology does not propose lithium battery temperature and charging current detection are put into system, makes and does perfectly not for the protection of lithium battery.
The utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, and charging safety more guarantees again the lithium battery charger of the optimized purpose band temperature detection of charging.
the technical scheme in the invention for solving the above technical problem is: with the lithium battery charger of temperature detection, its spy is: comprise the pfc circuit module, the DC/DC converter, processor and electrical parameters detection unit, described electrical parameters detection unit comprises that the charger output is provided with voltage detection unit, current detecting unit, temperature detecting unit, voltage detection unit, current detecting unit, temperature detecting unit is arranged on the charger output, described processor and DC/DC converter are all and voltage detection unit, current detecting unit, temperature detecting unit connects, processor is connected with the DC/DC converter and is connected the pfc circuit module.
Pfc circuit module described in the utility model adopts the BUCK type.
Processor adopting LM3S9B96 processor described in the utility model.
This is with the charge control method of the lithium battery charger of temperature detection, its spy is: the parameter in default a plurality of stages, comprising constant current charge predeterminated voltage, constant voltage charge predeterminated voltage, complete charge predetermined current, precharge guard time, constant current charge guard time, constant voltage charge guard time, safe preset temperature;
Detect terminal voltage, the electric current that flows through and the temperature of lithium battery,
Judgement lithium battery terminal voltage during the charging beginning:
1) if the lithium battery voltage value that detects stops charging greater than the constant voltage charge predeterminated voltage;
2) if the lithium battery voltage value that detects less than or equal to the constant current charge predeterminated voltage, enters pre-charging stage.
3) if the lithium battery voltage value that detects less than the constant voltage charge predeterminated voltage and greater than the constant current charge predeterminated voltage, directly enters the constant current charge stage;
4) if the lithium battery voltage value that detects equals the constant voltage charge predeterminated voltage, directly enter the constant voltage charge stage,
The control procedure of each charging stage:
A) in pre-charging stage, in the precharge guard time, lithium battery is carried out trickle charge, precharge guard time of every mistake detects the primary voltage value again, if the lithium battery voltage that detects is greater than the constant current charge predeterminated voltage, pre-charging stage is completed, and enters the constant current charge stage;
b) in the constant current charge stage, in the constant current charge guard time, lithium battery is carried out trickle charge, constant current charge guard time of every mistake detects the primary voltage value again, the temperature of the lithium battery that detects is less than safe preset temperature, continue constant current charge, if the lithium battery temperature value that detects is greater than safe preset temperature, temporarily stop charging until temperature returns to less than safe preset temperature, if the lithium battery voltage that detects is less than the constant voltage charge predeterminated voltage, continue constant current charge, if the lithium battery voltage that detects equals the constant voltage charge predeterminated voltage, enter the constant voltage charge stage,
c) in the constant voltage charge stage, in the constant voltage charge guard time, lithium battery is carried out constant voltage charge, constant voltage charge guard time of every mistake detects the primary voltage value again, if the temperature of the lithium battery that detects is less than safe preset temperature, continuous and constant pressure charging, if the temperature of the lithium battery that detects is greater than safe preset temperature, temporarily stop charging until temperature returns to less than preset value, if the lithium battery electric current that detects is greater than the complete charge predetermined current, continuous and constant pressure charging, if the lithium battery electric current that detects is less than the complete charge predetermined current, charging is completed.
Charge control method described in the utility model, input signal is adjusted to constant current value and constant voltage values is charged to lithium battery to utilize pulse width modulating signal to charge;
Charge control method described in the utility model, constant current charge predeterminated voltage value are made as that 2.9V, constant voltage charge predeterminated voltage value are made as 4.2V, complete charge predetermined current value is 200mA, and safe preset temperature is 50 ℃.
In charge control method described in the utility model, described precharge guard time, constant current charge guard time, constant voltage charge guard time are 5 seconds.
The utility model compared with prior art, have the following advantages and effect: due in the lithium cell charging process, carry out Based Intelligent Control, strictly control the parameters such as charging current, voltage, temperature, thereby improved charge efficiency, and realized the characteristics such as digitlization, intellectuality.Although the serviceability temperature scope of lithium battery is wider, but ambient temperature has a significant impact the discharge capacity of battery, through facts have proved, the high temperature that causes of charging can reduce the capacity of battery, monitoring by temperature, temperature is controlled within the specific limits the impact of battery capacity, utilized novel flush bonding processor LM3S9B96 to be master controller, overcome the problem of common employing easy heating that integrated IC brings.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model embodiment charger.
Fig. 2 is the control procedure schematic diagram of the charge control method of the utility model embodiment charger.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and by embodiment, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Referring to Fig. 1, the present embodiment lithium battery charger, comprise pfc circuit module 1, DC/DC converter 2, processor 3 and electrical parameters detection unit, the electrical parameters detection unit comprises voltage detection unit 41, current detecting unit 42, temperature detecting unit 43, voltage detection unit 41, current detecting unit 42, temperature detecting unit 43 are arranged on the charger output, processor 3 is connected with the DC/DC converter and all is connected with voltage detection unit 41, current detecting unit 42, temperature detecting unit 43, and processor 3 is connected with the DC/DC converter and is all connected pfc circuit module 1.In the present embodiment, pfc circuit module 1 adopts the BUCK type, and processor 3 adopts LM3S9B96 processor 3.Utilize novel flush bonding processor 3LM3S9B96 to be master controller, overcome the problem of common employing easy heating that integrated IC brings.
The present embodiment utilizes the pulse width modulation function of LM3S9B96 processor 3, can according to the different phase signal parameter that gathers flexibly modulation charging current, voltage, make it to become the desirable constant current value of lithium cell charging or constant voltage values.The present embodiment is for the charge-discharge characteristic of lithium battery and the demand in actual the use, utilize flush bonding processor 3LM3S9B96 to be master controller, overcome the problem of common employing easy heating that integrated IC brings, simultaneously due in the lithium cell charging process, carry out Based Intelligent Control, the parameters such as strict control charging current, voltage, temperature, thus charge efficiency improved, and realize the characteristics such as digitlization, intellectuality.
The present embodiment lithium battery charger charge control method selects different charge modes that lithium battery is charged according to the terminal voltage of lithium battery, the electric current that flows through and battery temperature, to reach not only safe charging but also the optimized purpose that guarantees to charge, the following principle of concrete employing: the parameter in default a plurality of stages, comprising constant current charge predeterminated voltage, constant voltage charge predeterminated voltage, complete charge predetermined current, precharge guard time, constant current charge guard time, constant voltage charge guard time, safe preset temperature; Input signal is adjusted to constant current value and constant voltage values is charged to lithium battery to utilize pulse width modulating signal to charge; Detect terminal voltage, the electric current that flows through and the temperature of lithium battery; In the present embodiment, constant current charge predeterminated voltage value is made as that 2.9V, constant voltage charge predeterminated voltage value are made as 4.2V, complete charge predetermined current value is 200mA, and safe preset temperature is that 50 ℃, trickle-charge current value are the 500mA of 500mA, constant current charge current value.Precharge guard time, constant current charge guard time, constant voltage charge guard time are 5 seconds.
Referring to Fig. 2, the charging process of the present embodiment, judgement lithium battery terminal voltage during the charging beginning:
1) if the lithium battery voltage value that detects stops charging greater than the constant voltage charge predeterminated voltage;
2) if the lithium battery voltage value that detects less than or equal to the constant current charge predeterminated voltage, enters pre-charging stage.
3) if the lithium battery voltage value that detects less than the constant voltage charge predeterminated voltage and greater than the constant current charge predeterminated voltage, directly enters the constant current charge stage;
4) if the lithium battery voltage value that detects equals the constant voltage charge predeterminated voltage, directly enter the constant voltage charge stage,
The control procedure of each charging stage:
A) in pre-charging stage, in the precharge guard time, lithium battery is carried out trickle charge, guard time 5 seconds, every mistake detected the primary voltage value in 5 seconds again, if the lithium battery voltage that detects is greater than the constant current charge predeterminated voltage, pre-charging stage is completed, and enters the constant current charge stage;
a) in the constant current charge stage, in the constant current charge guard time, lithium battery is carried out trickle charge, guard time 5 seconds, every mistake detected the primary voltage value in 5 seconds again, the temperature of the lithium battery that detects is less than safe preset temperature, continue constant current charge, if the lithium battery temperature value that detects is greater than safe preset temperature, temporarily stop charging until temperature returns to less than safe preset temperature, if the lithium battery voltage that detects is less than the constant voltage charge predeterminated voltage, continue constant current charge, if the lithium battery voltage that detects equals the constant voltage charge predeterminated voltage, enter the constant voltage charge stage,
b) in the constant voltage charge stage, in the constant voltage charge guard time, lithium battery is carried out constant voltage charge, guard time 5 seconds, every mistake detected the primary voltage value in 5 seconds again, if the temperature of the lithium battery that detects is less than safe preset temperature, continuous and constant pressure charging, if the temperature of the lithium battery that detects is greater than safe preset temperature, temporarily stop charging until temperature returns to less than preset value, if the lithium battery electric current that detects is greater than the complete charge predetermined current, continuous and constant pressure charging, if the lithium battery electric current that detects is less than the complete charge predetermined current, charging is completed.
Through facts have proved, adopt the 0.2C discharge rate, when ambient temperature is 25 ℃, can emit rated capacity; When ambient temperature was-10 ℃, battery capacity descended approximately 5%, when ambient temperature be-20 ℃, and battery capacity decline approximately 10%; The temperature height be also so, the present embodiment carries out Based Intelligent Control due in the lithium cell charging process, strictly controls the parameters such as charging current, voltage, temperature, thereby has improved charge efficiency, and realize the characteristics such as digitlization, intellectuality.Although the serviceability temperature scope of lithium battery is wider, but ambient temperature has a significant impact the discharge capacity of battery, and through facts have proved, the high temperature that causes of charging can reduce the capacity of battery, by the monitoring of temperature, temperature is controlled within the specific limits the impact of battery capacity.
Above content described in this specification is only to the explanation of the utility model example.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; only otherwise depart from the content of the utility model specification or surmount this scope as defined in the claims, all should belong to protection range of the present utility model.
Claims (3)
1. lithium battery charger with temperature detection, it is characterized in that: comprise pfc circuit module, DC/DC converter, processor and electrical parameters detection unit, described electrical parameters detection unit comprises voltage detection unit, current detecting unit and temperature detecting unit, voltage detection unit, current detecting unit, temperature detecting unit are arranged on the charger output, described processor and DC/DC converter all are connected with voltage detection unit, current detecting unit, temperature detecting unit, and processor is connected with the DC/DC converter and is connected the pfc circuit module.
2. the lithium battery charger with temperature detection according to claim 1, is characterized in that: described pfc circuit module employing BUCK type.
3. the lithium battery charger with temperature detection according to claim 1, is characterized in that: described processor adopting LM3S9B96 processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012205549469U CN202930977U (en) | 2012-10-27 | 2012-10-27 | Lithium battery charger with temperature detection |
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| CN2012205549469U CN202930977U (en) | 2012-10-27 | 2012-10-27 | Lithium battery charger with temperature detection |
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| CN202930977U true CN202930977U (en) | 2013-05-08 |
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| CN2012205549469U Expired - Fee Related CN202930977U (en) | 2012-10-27 | 2012-10-27 | Lithium battery charger with temperature detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558738A (en) * | 2016-11-30 | 2017-04-05 | 深圳拓邦股份有限公司 | A kind of method for charging batteries and battery charger |
| US11258272B2 (en) | 2018-12-21 | 2022-02-22 | Milwaukee Electric Tool Corporation | Temperature estimation and control systems, methods, and devices for a battery pack charger |
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2012
- 2012-10-27 CN CN2012205549469U patent/CN202930977U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558738A (en) * | 2016-11-30 | 2017-04-05 | 深圳拓邦股份有限公司 | A kind of method for charging batteries and battery charger |
| CN106558738B (en) * | 2016-11-30 | 2019-12-24 | 深圳拓邦股份有限公司 | Battery charging method and battery charging device |
| US11258272B2 (en) | 2018-12-21 | 2022-02-22 | Milwaukee Electric Tool Corporation | Temperature estimation and control systems, methods, and devices for a battery pack charger |
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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 |
Granted publication date: 20130508 Termination date: 20141027 |
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| EXPY | Termination of patent right or utility model |