CN103326437B - A kind of parallel charging method of charged in parallel circuit of multi-series lithium battery group - Google Patents
A kind of parallel charging method of charged in parallel circuit of multi-series lithium battery group Download PDFInfo
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- CN103326437B CN103326437B CN201310259240.9A CN201310259240A CN103326437B CN 103326437 B CN103326437 B CN 103326437B CN 201310259240 A CN201310259240 A CN 201310259240A CN 103326437 B CN103326437 B CN 103326437B
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Abstract
The invention discloses a kind of charged in parallel circuit of multi-series lithium battery group; it comprises the lithium electricity charging of a charger and composition and components and parts identical N string and protective circuit; the direct voltage positive output end of charger is connected with positive direct-current bus and negative DC bus respectively with direct voltage negative output terminal; the electricity charging of N string lithium and protective circuit comprise charging circuit and voltage, electric current and temperature sensing circuit; charging circuit is the isolation DC/DC charging circuit comprising current controlled circuit, and the electricity charging of N string lithium and protective circuit also comprise CPU and communicating circuit.The invention also discloses a kind of parallel charging method of multi-series lithium battery group, have following steps successively: initialization of 1) charging; 2) charging is started; 3) all charging is complete; 4) reported data.The present invention can ensure that the every series lithium battery in multi-series lithium battery can be full of, and makes whole Battery pack have maximum discharge capacity, significantly can increase the flying power of battery, extends the service life cycle of battery pack.
Description
Technical field
The present invention relates to battery charging, especially relate to a kind of parallel charging method of charged in parallel circuit of multi-series lithium battery group.
Background technology
Existing multi-series lithium battery group normally adopts the method for serial connection charge, described multi-series lithium battery group is the multi-series lithium battery group that the N series lithium battery comprising first series lithium battery and last series lithium battery is sequentially connected in series, N be equal to or greater than 2 positive integer, namely N string is at least two strings, the serial connection charge circuit of multi-series lithium battery group comprises a charger N number of charge protector identical with composition, the direct voltage positive output end of charger is connected with positive direct-current bus and negative DC bus respectively with direct voltage negative output terminal, positive direct-current bus is connected with the positive pole of multi-series lithium battery group and the positive pole of first series lithium battery, negative DC bus is connected with the negative pole of multi-series lithium battery group and the negative pole of last series lithium battery, charger work can be charged, N number of charge protector is overcharge protection circuit, comprise voltage detecting circuit, current detection circuit and/or temperature sensing circuit can also be comprised, the two ends of the detection means of voltage detecting circuit are connected with the positive pole of corresponding series lithium battery and negative pole respectively, the detection means of current detection circuit is connected in series between the positive pole of corresponding series lithium battery and positive direct-current bus, or be connected in series between the negative pole of corresponding series lithium battery and negative DC bus, the two ends of the detection means of temperature sensing circuit are connected with the positive pole of corresponding series lithium battery and negative pole respectively.
The method of the serial connection charge of multi-series lithium battery group has following steps successively: the multi-series lithium battery group be sequentially connected in series by the N series lithium battery comprising first series lithium battery and last series lithium battery, N be equal to or greater than 2 positive integer, N string be namely at least two strings; The direct voltage positive output end of charger is connected with positive direct-current bus and negative DC bus respectively with direct voltage negative output terminal; Finally positive direct-current bus is connected to the positive pole of the positive pole of multi-series lithium battery group and first series lithium battery, the negative pole of negative pole and last series lithium battery that negative DC bus is connected to multi-series lithium battery group charges.In charging process; as long as wherein a series lithium battery generation over-charge protective and stop charging; other series lithium battery also stops charging; therefore; adopt the method for serial connection charge can not guarantee that the every series lithium battery in multi-series lithium battery group can be full of; thus, limit the discharge capacity of multi-series lithium battery group, reduce the service life cycle of multi-series lithium battery group.
Summary of the invention
Technical problem to be solved by this invention is the defect making up above-mentioned prior art, provides a kind of parallel charging method of charged in parallel circuit of multi-series lithium battery group.
Technical problem of the present invention is solved by the following technical programs.
The parallel charging method of the charged in parallel circuit of this multi-series lithium battery group,
Described multi-series lithium battery group is the multi-series lithium battery group that the N series lithium battery comprising first series lithium battery and last series lithium battery is sequentially connected in series, N be equal to or greater than 2 positive integer, N string be namely at least two strings;
Described charged in parallel circuit comprises the lithium electricity charging of a charger and composition and components and parts identical N string and protective circuit, and the direct voltage positive output end of described charger is connected with positive direct-current bus and negative DC bus respectively with direct voltage negative output terminal;
The electricity charging of described N string lithium and protective circuit comprise charging circuit and voltage, electric current and temperature sensing circuit.
Described charging circuit is isolated DC/DC converter (the Directcurrent/Direct current converter comprising current controlled circuit, initialism is DC/DC) charging circuit, two inputs of described isolation DC/DC charging circuit are connected with described positive direct-current bus and negative DC bus respectively, two outputs of described isolation DC/DC charging circuit are connected with the positive pole of corresponding series lithium battery and negative pole respectively, and described isolation DC/DC charging circuit is for charging the electrical energy transfer of described charger separately to corresponding series lithium battery.
The electricity charging of described N string lithium and protective circuit also comprise CPU and communicating circuit, one end of described CPU is connected with the control end of the current controlled circuit of the isolation DC/DC charging circuit of corresponding string, DC/DC charging circuit is isolated to the output current of single series lithium battery constant current charge for controlling, realize the charging of single series lithium battery, the charging of other series lithium battery is not affected after complete charge, the another end of described CPU and described voltage, electric current is connected with the control end of temperature sensing circuit, for control voltage, electric current and temperature sensing circuit detect the voltage of single series lithium battery, electric current and temperature, and the data detected are processed, comprise the capacity that calculates corresponding series lithium battery and close according to result or open described isolation DC/DC charging circuit, the other end of described CPU is connected with described communicating circuit, described communicating circuit is connected with external communication bus, described communicating circuit accepts the control of described CPU, for the voltage of the corresponding series lithium battery by described CPU process, electric current, temperature and capacity data are sent to the man-machine interface possessing communication interface by external communication bus.
This multi-series lithium battery group the feature of parallel charging method of charged in parallel circuit be:
There are following steps successively:
1) charging initialization, comprises following sub-step:
11) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects the voltage of each corresponding series lithium battery, electric current and temperature whether in safe range by the voltage of each corresponding string, electric current and temperature sensing circuit;
12) if the voltage of certain series lithium battery and/or electric current and/or temperature anomaly is not in safe range, the isolation DC/DC charging circuit of alarm command to corresponding string is sent by CPU, the charging of this series lithium battery is terminated by the isolation DC/DC charging circuit of corresponding string, if the voltage of corresponding series lithium battery, electric current and temperature are all normal in safe range, enter step 2);
2) start charging, comprise following sub-step:
21) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects charging current in real time by the voltage of each corresponding string, electric current and temperature sensing circuit all the time, and adjust the output voltage of the isolation DC/DC charging circuit of corresponding string in real time, ensure the charging current constant current charge of this series lithium battery at the charging initial stage by setting;
22) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects charging voltage in real time by the voltage of each corresponding string, electric current and temperature sensing circuit all the time, if when the charging voltage of certain series lithium battery reaches the over-voltage protection point of setting, the N CPU gone here and there in the charging of lithium electricity and protective circuit adjusts the output current of the isolation DC/DC charging circuit of corresponding string in real time, ensures that this series lithium battery transfers trickle charge to after constant current charge terminates;
23) CPU that N goes here and there in the charging of lithium electricity and protective circuit passes through the voltage of each corresponding string all the time, electric current and temperature sensing circuit detect the voltage of the lithium battery of each corresponding string in real time, electric current, temperature and capacity, if generation overvoltage, excess temperature or overcurrent, the isolation DC/DC charging circuit of alarm command to corresponding string is sent by CPU, by reducing the output voltage of the isolation DC/DC charging circuit of corresponding string, charging current implements overvoltage, overcurrent and overheat protector, and by the isolation DC/DC charging circuit complete charge of corresponding string, if the voltage of the lithium battery of each corresponding string, electric current, temperature and capacity normal, enter step 3),
3) all charging is complete:
When the charging voltage value of the lithium battery of each corresponding string reaches the monomer protection voltage threshold of setting, the N CPU gone here and there in the charging of lithium electricity and protective circuit closes the isolation DC/DC charging circuit of corresponding string by sending instruction, complete charge, does not affect the charging of other series lithium battery;
4) reported data:
N gone here and there the voltage of each corresponding series lithium battery of the CPU process in the charging of lithium electricity and protective circuit, electric current, temperature and capacity data by communication interface and be sent to the man-machine interface possessing communication interface by external communication bus.
Technical problem of the present invention is solved by following further technical scheme.
Described isolation DC/DC charging circuit is the typical isolation DC/DC charging circuit controlled by HF switch.
Described CPU is the microprocessor being embedded with charging control program, trace routine and communication program.
Described voltage, electric current and temperature sensing circuit comprise the voltage detecting circuit of discrete setting, current detection circuit and temperature sensing circuit, and described voltage, electric current and temperature sensing circuit are for detecting the voltage of corresponding series lithium battery, electric current and temperature.
Described communicating circuit comprises multinode serial communication interface.
The present invention's beneficial effect is compared with prior art:
The charged in parallel circuit of multi-series lithium battery adopts parallel charging method of the present invention, can ensure that every series lithium battery can be full of, and makes whole Battery pack have maximum discharge capacity, significantly can increase the flying power of battery, extends the service life cycle of battery pack.
Accompanying drawing explanation
Fig. 1 is the charged in parallel circuit diagram of the specific embodiment of the invention;
Fig. 2 is the parallel charging method flow chart of the charged in parallel circuit of Fig. 1.
Embodiment
Contrast accompanying drawing below in conjunction with embodiment the present invention will be described.
A kind of charged in parallel circuit of multi-series lithium battery group as shown in Figure 1, multi-series lithium battery group is the multi-series lithium battery group that the N series lithium battery comprising first series lithium battery and last series lithium battery is sequentially connected in series, N be equal to or greater than 2 positive integer, namely N string is at least two strings, charged in parallel circuit comprises the lithium electricity charging of a charger and composition and components and parts identical N string and protective circuit, the direct voltage positive output end of charger is connected with positive direct-current bus and negative DC bus respectively with direct voltage negative output terminal, the electricity charging of N string lithium and protective circuit comprise charging circuit and voltage, electric current and temperature sensing circuit.
Charging circuit is the typical isolation DC/DC charging circuit controlled by HF switch comprising current controlled circuit, two input is connected with positive direct-current bus and negative DC bus respectively, two output is connected with the positive pole of corresponding series lithium battery and negative pole respectively, and isolation DC/DC charging circuit is used for the electrical energy transfer of charger to charge separately to corresponding series lithium battery.
Voltage, electric current and temperature sensing circuit comprise the voltage detecting circuit of discrete setting, current detection circuit and temperature sensing circuit, and voltage, electric current and temperature sensing circuit are for detecting the voltage of corresponding series lithium battery, electric current and temperature.
The electricity charging of N string lithium and protective circuit also comprise CPU and communicating circuit, CPU is embedded with charging control program, the microprocessor of trace routine and communication program, one end of CPU is connected with the control end of the current controlled circuit of the isolation DC/DC charging circuit of corresponding string, DC/DC charging circuit is isolated to the output current of single series lithium battery constant current charge for controlling, realize the charging of single series lithium battery, the charging of other series lithium battery is not affected after complete charge, the another end of CPU and voltage, electric current is connected with the control end of temperature sensing circuit, for control voltage, electric current and temperature sensing circuit detect the voltage of single series lithium battery, electric current and temperature, and the data detected are processed, comprise the capacity that calculates corresponding series lithium battery and close according to result or open isolation DC/DC charging circuit, the other end of CPU is connected with communicating circuit, communicating circuit comprises the multinode serial communication interface be connected with external communication bus, communicating circuit accepts the control of CPU, for the voltage of the corresponding series lithium battery by CPU process, electric current, temperature and capacity data are sent to the man-machine interface possessing communication interface by external communication bus.
The parallel charging method adopting the charged in parallel circuit of this embodiment as shown in Figure 2, has following steps successively:
1) charging initialization, comprises following sub-step:
11) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects the voltage of each corresponding series lithium battery, electric current and temperature whether in safe range by the voltage of each corresponding string, electric current and temperature sensing circuit;
12) if the voltage of certain series lithium battery and/or electric current and/or temperature anomaly is not in safe range, the isolation DC/DC charging circuit of alarm command to corresponding string is sent by CPU, the charging of this series lithium battery is terminated by the isolation DC/DC charging circuit of corresponding string, if the voltage of corresponding series lithium battery, electric current and temperature are all normal in safe range, enter step 2);
2) start charging, comprise following sub-step:
21) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects charging current in real time by the voltage of each corresponding string, electric current and temperature sensing circuit all the time, and adjust the output voltage of the isolation DC/DC charging circuit of corresponding string in real time, ensure the charging current constant current charge of this series lithium battery at the charging initial stage by setting;
22) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects charging voltage in real time by the voltage of each corresponding string, electric current and temperature sensing circuit all the time, if when the charging voltage of certain series lithium battery reaches the over-voltage protection point of setting, the N CPU gone here and there in the charging of lithium electricity and protective circuit adjusts the output current of the isolation DC/DC charging circuit of corresponding string in real time, ensures that this series lithium battery transfers trickle charge to after constant current charge terminates;
23) CPU that N goes here and there in the charging of lithium electricity and protective circuit passes through the voltage of each corresponding string all the time, electric current and temperature sensing circuit detect the voltage of the lithium battery of each corresponding string in real time, electric current, temperature and capacity, if generation overvoltage, excess temperature or overcurrent, the isolation DC/DC charging circuit of alarm command to corresponding string is sent by CPU, by reducing the output voltage of the isolation DC/DC charging circuit of corresponding string, charging current implements overvoltage, overcurrent and overheat protector, and by the isolation DC/DC charging circuit complete charge of corresponding string, if the voltage of the lithium battery of each corresponding string, electric current, temperature and capacity normal, enter step 3),
3) all charging is complete:
When the charging voltage value of the lithium battery of each corresponding string reaches the monomer protection voltage threshold of setting, the N CPU gone here and there in the charging of lithium electricity and protective circuit closes the isolation DC/DC charging circuit of corresponding string by sending instruction, complete charge, does not affect the charging of other series lithium battery;
4) reported data:
N gone here and there the voltage of each corresponding series lithium battery of the CPU process in the charging of lithium electricity and protective circuit, electric current, temperature and capacity data by communication interface and be sent to the man-machine interface possessing communication interface by external communication bus.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make some equivalent alternative or obvious modification without departing from the inventive concept of the premise; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (4)
1. a parallel charging method for the charged in parallel circuit of multi-series lithium battery group,
Described multi-series lithium battery group is the multi-series lithium battery group that the N series lithium battery comprising first series lithium battery and last series lithium battery is sequentially connected in series, N be equal to or greater than 2 positive integer, N string be namely at least two strings;
Described charged in parallel circuit comprises the lithium electricity charging of a charger and composition and components and parts identical N string and protective circuit, and the direct voltage positive output end of described charger is connected with positive direct-current bus and negative DC bus respectively with direct voltage negative output terminal;
The electricity charging of described N string lithium and protective circuit comprise charging circuit and voltage, electric current and temperature sensing circuit;
Described charging circuit is the isolated DC/DC converter DC/DC charging circuit comprising current controlled circuit, two inputs of described isolation DC/DC charging circuit are connected with described positive direct-current bus and negative DC bus respectively, two outputs of described isolation DC/DC charging circuit are connected with the positive pole of corresponding series lithium battery and negative pole respectively, and described isolation DC/DC charging circuit is for charging the electrical energy transfer of described charger separately to corresponding series lithium battery;
The electricity charging of described N string lithium and protective circuit also comprise CPU and communicating circuit, one end of described CPU is connected with the control end of the current controlled circuit of the isolation DC/DC charging circuit of corresponding string, DC/DC charging circuit is isolated to the output current of single series lithium battery constant current charge for controlling, realize the charging of single series lithium battery, the charging of other series lithium battery is not affected after complete charge, the another end of described CPU and described voltage, electric current is connected with the control end of temperature sensing circuit, for control voltage, electric current and temperature sensing circuit detect the voltage of single series lithium battery, electric current and temperature, and the data detected are processed, comprise the capacity that calculates corresponding series lithium battery and close according to result or open described isolation DC/DC charging circuit, the other end of described CPU is connected with described communicating circuit, described communicating circuit is connected with external communication bus, described communicating circuit accepts the control of described CPU, for the voltage of the corresponding series lithium battery by described CPU process, electric current, temperature and capacity data are sent to the man-machine interface possessing communication interface by external communication bus,
It is characterized in that:
There are following steps successively:
1) charging initialization, comprises following sub-step:
11) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects the voltage of each corresponding series lithium battery, electric current and temperature whether in safe range by the voltage of each corresponding string, electric current and temperature sensing circuit;
12) if the voltage of certain series lithium battery and/or electric current and/or temperature anomaly is not in safe range, the isolation DC/DC charging circuit of alarm command to corresponding string is sent by CPU, the charging of this series lithium battery is terminated by the isolation DC/DC charging circuit of corresponding string, if the voltage of corresponding series lithium battery, electric current and temperature are all normal in safe range, enter step 2);
2) start charging, comprise following sub-step:
21) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects charging current in real time by the voltage of each corresponding string, electric current and temperature sensing circuit all the time, and adjust the output voltage of the isolation DC/DC charging circuit of corresponding string in real time, ensure the charging current constant current charge of this series lithium battery at the charging initial stage by setting;
22) CPU gone here and there in the charging of lithium electricity and protective circuit by N detects charging voltage in real time by the voltage of each corresponding string, electric current and temperature sensing circuit all the time, if when the charging voltage of certain series lithium battery reaches the over-voltage protection point of setting, the N CPU gone here and there in the charging of lithium electricity and protective circuit adjusts the output current of the isolation DC/DC charging circuit of corresponding string in real time, ensures that this series lithium battery transfers trickle charge to after constant current charge terminates;
23) CPU that N goes here and there in the charging of lithium electricity and protective circuit passes through the voltage of each corresponding string all the time, electric current and temperature sensing circuit detect the voltage of the lithium battery of each corresponding string in real time, electric current, temperature and capacity, if generation overvoltage, excess temperature or overcurrent, the isolation DC/DC charging circuit of alarm command to corresponding string is sent by CPU, by reducing the output voltage of the isolation DC/DC charging circuit of corresponding string, charging current implements overvoltage, overcurrent and overheat protector, and by the isolation DC/DC charging circuit complete charge of corresponding string, if the voltage of the lithium battery of each corresponding string, electric current, temperature and capacity normal, enter step 3),
3) all charging is complete:
When the charging voltage value of the lithium battery of each corresponding string reaches the monomer protection voltage threshold of setting, the N CPU gone here and there in the charging of lithium electricity and protective circuit closes the isolation DC/DC charging circuit of corresponding string by sending instruction, complete charge, does not affect the charging of other series lithium battery;
4) reported data:
N gone here and there the voltage of each corresponding series lithium battery of the CPU process in the charging of lithium electricity and protective circuit, electric current, temperature and capacity data by communication interface and be sent to the man-machine interface possessing communication interface by external communication bus.
2. the parallel charging method of the charged in parallel circuit of multi-series lithium battery group as claimed in claim 1, is characterized in that:
Described CPU is the microprocessor being embedded with charging control program, trace routine and communication program.
3. the parallel charging method of the charged in parallel circuit of multi-series lithium battery group as claimed in claim 1, is characterized in that:
Described voltage, electric current and temperature sensing circuit comprise the voltage detecting circuit of discrete setting, current detection circuit and temperature sensing circuit, and described voltage, electric current and temperature sensing circuit are for detecting the voltage of corresponding series lithium battery, electric current and temperature.
4. the parallel charging method of the charged in parallel circuit of multi-series lithium battery group as claimed in claim 1, is characterized in that:
Described communicating circuit comprises multinode serial communication interface.
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| CN103607027B (en) * | 2013-12-06 | 2016-08-17 | 淄博明泰电器科技有限公司 | Modular battery equilibrium and charging system |
| CN104578308A (en) * | 2015-01-25 | 2015-04-29 | 浙江大学 | Parallel connection charging module for AUV wireless charging |
| DE102015210920A1 (en) | 2015-06-15 | 2016-12-15 | TRUMPF Hüttinger GmbH + Co. KG | Redox flow battery system and method for detecting a fault in a bridge circuit of a DC / DC converter of a redox flow battery system |
| CN106655105A (en) * | 2016-12-16 | 2017-05-10 | 河南新太行电源股份有限公司 | Anti-overcharge protection apparatus for storage battery |
| CN109066922A (en) * | 2018-10-10 | 2018-12-21 | 中车株洲电力机车有限公司 | A kind of rail traffic vehicles and its storage battery power supply system |
| CN111092460B (en) * | 2018-10-23 | 2024-03-01 | Oppo广东移动通信有限公司 | Charging control method and device and computer storage medium |
| CN113067381B (en) * | 2021-03-26 | 2023-11-03 | 深圳市迪浦电子有限公司 | Multi-lithium battery protection system |
| CN114123427B (en) * | 2021-12-09 | 2024-04-30 | 歌尔科技有限公司 | Battery charging control method and device, electronic equipment and storage medium |
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Address after: 518057, Shenzhen, Guangdong province Nanshan District hi tech Park North Qi Road, 2, Qing Bang electronic building B Building 5, building 6, floor Patentee after: Ke Lie technical concern Co., Ltd of Shenzhen Address before: 518000, 15 floor, 3 industrial zone, two road, Nantou pass, Nanshan District, Guangdong, Shenzhen Patentee before: Shenzhen Klclear Technology Co., Ltd. |