CN111224185A - Controllable self-repairing system and method for lithium battery - Google Patents
Controllable self-repairing system and method for lithium battery Download PDFInfo
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- CN111224185A CN111224185A CN202010112728.9A CN202010112728A CN111224185A CN 111224185 A CN111224185 A CN 111224185A CN 202010112728 A CN202010112728 A CN 202010112728A CN 111224185 A CN111224185 A CN 111224185A
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- Prior art keywords
- lithium battery
- battery
- maintenance
- lithium
- power unit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
The invention provides a controllable self-repairing method of lithium batteries, which is characterized in that after the maintenance condition of a lithium battery pack is met, each string of single lithium batteries of a lithium battery level is independently discharged, and the charged state of all the single lithium batteries is pulled back to the same zero-charged state. The invention also provides a controllable self-repairing system of the lithium battery. The invention has the beneficial effects that: the battery balancing problem can be solved well, and the cost is low.
Description
Technical Field
The present invention relates to lithium battery systems, and more particularly, to a controllable self-repairing system and method for lithium batteries.
Background
The lithium ion battery has the advantages of high energy density, light weight and long service life, but has a plurality of defects, the charging and discharging of the lithium battery need to manage the work of the battery by a management system, otherwise, the overcharge and overdischarge conditions can be generated, the electrochemical negative reaction in the battery can be caused, a large amount of flammable and explosive gas can be produced, the swelling and the irreversible loss can be caused, and the most important is the battery balancing problem except the overcharge and overdischarge needs to be controlled.
The balancing means that the capacity, voltage, internal resistance and the like of each single battery in the battery pack are always kept the same, the maximum capacity can be exerted only when the battery pack is charged and discharged, the capacity imbalance and the voltage imbalance can occur after the lithium battery is used for a period of time, even if the battery pack is assembled, the capacity of each single battery is accurately divided, the problem that the capacity of each single battery is uneven after the battery pack is used for a period of time is still generated, the battery is exploded and burnt seriously, the problem is solved by most of the BMS management systems which adopt passive balancing at present, the balancing problem is solved by the passive balancing, the balancing problem of the battery cannot be solved at all only by the water-filled vehicle, a small part of the battery is not actively balanced, but the active balancing is not mature at present, the reverse action can be realized, and the active balancing cost is high, the system is complex, the price requirement of the current market on the lithium battery system is higher and higher, and the actively balanced cost and effect are reasons which most market users cannot select. In the use process of the lithium battery pack, once the voltage of one single battery is low, the BMS system detects the battery with low voltage, the BMS system uses the lowest battery as a capacity parameter to calculate a closing standard, otherwise, the single battery is overcharged and overdischarged, and the danger of bulge and even explosion is caused.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a controllable self-repairing system and method of a lithium battery.
The invention provides a controllable self-repairing method of lithium batteries, which is characterized in that after the maintenance condition of a lithium battery pack is met, each string of single lithium batteries of a lithium battery level is independently discharged, and the charged state of all the single lithium batteries is pulled back to the same zero-charged state.
As a further improvement of the invention, after the service time of the lithium battery pack reaches the set time, each string of single lithium batteries of the lithium battery level is independently discharged, and the charged state of all the single lithium batteries is pulled back to the same zero-electricity state again.
The invention also provides a controllable self-repairing system of the lithium battery, which is used for realizing the controllable self-repairing method of the lithium battery.
As a further improvement of the present invention, a controllable self-repairing system for a lithium battery comprises a battery management system and a plurality of maintenance modules which operate independently and are independent of each other, wherein each maintenance module comprises a single control chip, a single lithium battery, an MOS transistor and a power unit, an input terminal of the battery management system is connected with an external signal, an output terminal of the battery management system is connected with an input terminal of the single control chip, an output terminal of the single control chip is connected with a control pin of the MOS transistor to control the on/off of the MOS transistor, the single lithium battery is connected with the MOS transistor, the MOS transistor is connected with the power unit, the power unit is connected with the single lithium battery, the MOS transistor and the power unit form a loop, and when the battery management system receives an external maintenance signal, a maintenance instruction is sent to each maintenance module, and after the single control chip of the maintenance module receives a maintenance instruction, the single control chip controls the MOS tube closed loop, the current of the single lithium battery passes through the MOS tube and passes through the power unit, the power unit consumes electric quantity, and the single control chip controls the MOS tube open loop until each maintenance module finishes working after the power unit reaches a set voltage.
As a further improvement of the present invention, the power unit is a power resistor.
The invention has the beneficial effects that: through the scheme, the problem of balancing the batteries can be solved well, and the cost is low.
Drawings
Fig. 1 is a schematic diagram of a controllable self-repairing system of a lithium battery according to the present invention.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
A controllable self-repairing method for lithium batteries is characterized in that after the service time of a lithium battery pack reaches a set time, each string of single lithium batteries of a lithium battery level is independently discharged, and the charged state of all the single lithium batteries is pulled back to the same zero-electricity state again.
As shown in fig. 1, a controllable self-repairing system for a lithium battery comprises a Battery Management System (BMS)1 and a plurality of maintenance modules which operate independently and are independent of each other, wherein each maintenance module comprises a single control chip (IC)2, a single lithium battery 3, an MOS transistor 4 and a power resistor 5, an input terminal of the battery management system 1 is connected with an external signal, an output terminal of the battery management system 1 is connected with an input terminal of the single control chip 2, an output terminal of the single control chip 2 is connected with a control pin of the MOS transistor 4 to control the on/off of the MOS transistor 4, the single lithium battery 3 is connected with the MOS transistor 4, the MOS transistor 4 is connected with the power resistor 5, the power resistor 5 is connected with the single lithium battery 3, the MOS transistor 4 and the power resistor 5 form a loop, when the battery management system 1 receives an external maintenance signal, sending a maintenance instruction to each maintenance module, controlling a closed loop of an MOS tube 4 after a single-section control chip 2 of each maintenance module receives the maintenance instruction, enabling the current of a single lithium battery 3 to pass through the MOS tube 4 and the power resistor 5, consuming the electric quantity through a heating mode of the power resistor 5 until a set voltage is reached, and controlling the open loop of the MOS tube 5 by the single-section control chip 3 until each maintenance module finishes working.
According to the controllable self-repairing system and method of the lithium battery, after the battery is used for a period of time, the battery is controlled to independently discharge each string of batteries through a set program or an external signal, and the battery charge state is pulled back to the same zero-electricity state again, so that the effect of recovering the consistency of the battery is achieved.
For example: a set of 8 strings of lithium cells, this group lithium cell group list festival discharge protection voltage is 2.5V, and actual voltage data is as follows:
| CELL1 | CELL2 | CELL3 | CELL4 | CELL5 | CELL6 | CELL7 | CELL8 |
| 3.02V | 2.95V | 2.96V | 2.98V | 3.01V | 2.95V | 2.63V | 2.98V |
at the moment, the highest voltage of the battery is CELL1:3.02V, and the lowest voltage is CELL 7: 2.63V, in the discharging process of the battery pack, CELL7 inevitably triggers over-discharge protection firstly, so that the capacity of other CELL is not discharged when the whole battery pack is over-discharged due to CELL7, and further the capacity of the whole battery pack is lost. At this time, if a remote self-repairing lithium battery system patent is introduced, the maintenance mode can be started through an external signal, each battery CELL, CELL 1-CELL 8, is independently discharged, the voltage is set to 2.5V, and after the maintenance is finished, the voltage of the battery is in the following states:
| CELL1 | CELL2 | CELL3 | CELL4 | CELL5 | CELL6 | CELL7 | CELL8 |
| 2.5V | 2.5V | 2.5V | 2.5V | 2.5V | 2.5V | 2.5V | 2.5V |
at this time, the voltage capacity of the battery returns to the same state again, the problem of consistency deviation of the battery caused by differences of temperature, environment, internal resistance and the like is solved to a great extent, partial capacity of the battery pack can be repaired, and the effect of prolonging the service life of the battery is achieved.
Referring to fig. 1, when the battery needs to be maintained, the battery can be controlled to start a maintenance mode through an external switch or a remote signal, the BMS sends an instruction to the maintenance modules after receiving the signal, each maintenance module operates independently and is independent of the other, the maintenance modules close an MOS loop after receiving the signal, the battery current passes through the MOS tube and passes through the power resistor 5, the power resistor 5 consumes electric power through a heating mode, until a set voltage (such as 2.5V of a lithium iron battery) is reached, the single control chip 2 controls the MOS tube 4 to open the loop until each maintenance module finishes working, and at the moment, the battery is in the same voltage state, so that the battery maintenance effect is achieved.
According to the system and the method for the controllable self-repairing of the lithium battery, provided by the invention, the energy of a single battery is consumed through the external signal control system, and the battery starting maintenance state is controlled through a remote or external signal, so that the problem of battery consistency is solved.
The controllable self-repairing system and method of the lithium battery, provided by the invention, provide a remote control maintenance scheme for the lithium battery system, can effectively slow down the service life and capacity attenuation of the lithium battery, can effectively prolong the service life of the battery, and can increase the life cycle of the lithium battery.
The controllable self-repairing system and method of the lithium battery provided by the invention have the following advantages:
1. the problem of battery consistency can be maintained without disassembly, and the after-sale maintenance cost is greatly reduced;
2. the remote control can be carried out for maintenance, and the field operation of personnel is not needed;
3. the service life of the lithium battery can be prolonged, and the problem of poor consistency of the battery caused by the influence of environment and temperature on the slow speed of the battery is solved.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (5)
1. A controllable self-repairing method of a lithium battery is characterized in that: and after the maintenance condition of the lithium battery pack is met, independently discharging each string of single lithium batteries of the lithium battery level, and pulling back the charged state of all the single lithium batteries to the same zero-electric-quantity state again.
2. The controllable self-healing process of claim 1, wherein: and when the service time of the lithium battery pack reaches the set time, each string of single lithium batteries of the lithium battery level is independently discharged, and the charged state of all the single lithium batteries is pulled back to the same zero-electric-quantity state.
3. A controllable self-repairing system of a lithium battery is characterized in that: controllable self-healing process for the realization of a lithium battery as claimed in claim 1 or 2.
4. The controllable self-healing system of claim 3, wherein: the maintenance module comprises a battery management system and a plurality of independent maintenance modules which operate independently and are independent from each other, wherein the maintenance modules comprise a single control chip, a single lithium battery, an MOS (metal oxide semiconductor) tube and a power unit, the input end of the battery management system is connected with an external signal, the output end of the battery management system is connected with the input end of the single control chip, the output end of the single control chip is connected with a control pin of the MOS tube so as to control the on-off of the MOS tube, the single lithium battery is connected with the MOS tube, the MOS tube is connected with the power unit, the power unit is connected with the single lithium battery, the MOS tube and the power unit form a loop, when the battery management system receives an external maintenance signal, a maintenance instruction is sent to each maintenance module, and after the single control chip of the maintenance module receives the maintenance instruction, the control MOS pipe closed circuit, the electric current warp of monomer lithium cell the MOS pipe passes through power unit, power unit consumes the electric quantity, until reaching behind the settlement voltage, single section control chip control MOS pipe open circuit, until each maintenance module work is ended.
5. The controllable self-healing system of claim 4, wherein: the power unit is a power resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112728.9A CN111224185A (en) | 2020-02-24 | 2020-02-24 | Controllable self-repairing system and method for lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010112728.9A CN111224185A (en) | 2020-02-24 | 2020-02-24 | Controllable self-repairing system and method for lithium battery |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178566A (en) * | 2011-12-26 | 2013-06-26 | 广州丰江电池新技术股份有限公司 | Uncharged state maintenance method and maintenance instrument of lithium battery pack unbalance |
| US20140285022A1 (en) * | 2010-11-04 | 2014-09-25 | Elite Power Solution LLC | Uninterrupted lithium battery power supply system |
| CN206451787U (en) * | 2016-10-27 | 2017-08-29 | 彭旭华 | It is a kind of to force the emergent automobile starting battery lighted a fire |
| CN108448671A (en) * | 2018-03-26 | 2018-08-24 | 南通宁远自动化科技有限公司 | A kind of external passive balancer |
| CN109786863A (en) * | 2017-11-13 | 2019-05-21 | 屈海强 | A kind of lithium battery group balance of voltage repairs circuit and restorative procedure |
-
2020
- 2020-02-24 CN CN202010112728.9A patent/CN111224185A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140285022A1 (en) * | 2010-11-04 | 2014-09-25 | Elite Power Solution LLC | Uninterrupted lithium battery power supply system |
| CN103178566A (en) * | 2011-12-26 | 2013-06-26 | 广州丰江电池新技术股份有限公司 | Uncharged state maintenance method and maintenance instrument of lithium battery pack unbalance |
| CN206451787U (en) * | 2016-10-27 | 2017-08-29 | 彭旭华 | It is a kind of to force the emergent automobile starting battery lighted a fire |
| CN109786863A (en) * | 2017-11-13 | 2019-05-21 | 屈海强 | A kind of lithium battery group balance of voltage repairs circuit and restorative procedure |
| CN108448671A (en) * | 2018-03-26 | 2018-08-24 | 南通宁远自动化科技有限公司 | A kind of external passive balancer |
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