CN104505905A - Single-charged and series-discharged lithium battery pack - Google Patents
Single-charged and series-discharged lithium battery pack Download PDFInfo
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- CN104505905A CN104505905A CN201510005564.9A CN201510005564A CN104505905A CN 104505905 A CN104505905 A CN 104505905A CN 201510005564 A CN201510005564 A CN 201510005564A CN 104505905 A CN104505905 A CN 104505905A
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Abstract
The invention discloses a single-charged and series-discharged lithium battery pack. The single-charged and series-discharged lithium battery pack comprises a charging power source module and at least one independent battery node. The charging power source module is electrically connected with the independent battery nodes and provides stable charging voltage for the independent battery nodes; the charging positive terminals and the charging negative terminals of the independent battery nodes are connected in parallel, and the discharging positive terminals and the discharging negative terminals of the independent battery nodes are connected in series. The single-charged and series-discharged lithium battery pack can ensure full charging of every battery cell and avoid the problem of overcharging during charging and determine whether to output current outwards during discharging according the voltage state of the battery cells, thereby ensuring full utilization of the power quantity of every battery cell. Besides, the single-charged and series-discharged lithium battery pack can achieve mixed application of chargeable battery cells with different characteristics and capacities and has the advantages of being high in utilization rate of the battery cells, long in service life and the like.
Description
Technical field
The invention belongs to technical field of lithium batteries, particularly a kind of lithium battery group of charge independence discharged in series.
Background technology
Lithium battery applications scope is comparatively wide, larger for lithium battery group use amount in social all trades and professions.At present, mainly adopt serial connection charge mode during the charging of lithium battery group, in charging process, ubiquity charges unbalanced problem, and only have part battery core to be full of, all the other battery cores are then in the state of being not fully filled, and directly affects the actual capacity of battery pack; During electric discharge, due to the inconsistency of battery core, a part of battery core can be caused first to give out light electricity, and other battery cores still have part electricity, but directly can turn off discharge switch when battery management system detects that certain battery core is under-voltage, stop externally electric discharge, the electricity that in battery pack, those still retain can not get sufficient utilization; And the battery core that the battery pack of serial connection charge discharged in series is difficult to realize dissimilar different capabilities is used with, and this have impact on the utilance of battery core, causes the unnecessary wasting of resources.Therefore, change the charge/discharge operation mode of lithium battery group, for the utilance improving battery core, the useful life extending battery pack has positive facilitation.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of lithium battery group of charge independence discharged in series is provided, this lithium battery group can realize the charge independence of battery core, guarantee that each battery core can be full of, and not easily there is the problem that overcharges, adopt discharged in series working method when discharging, and can determine the need of external output current according to battery core its voltage, guarantee making full use of of each battery core electricity.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of lithium battery group of charge independence discharged in series, comprises charging power modules and at least one independent battery node; Described charging power modules and independent battery node are electrically connected, for it provides stable charging voltage; Charging positive terminal and the charging negative pole end of described independent battery node are connected in parallel, and electric discharge positive terminal and electric discharge negative pole end are connected in series;
Described independent battery node comprises charging battery core, charge independence module, control of discharge module, charge protector and electric discharge bypass circuit; Described charge independence module is electrically connected with charging battery core, in order to charge to battery core, is provided with buffer circuit in described charge independence module, in order to intercept between each independent battery node against filling; Described charge protector and charge independence model calling, in order to detect the operating state of charge independence module; Described control of discharge module and charge protector are electrically connected, in order to the break-make of controlled discharge electric current; Described electric discharge bypass circuit and control of discharge module are electrically connected, and time under-voltage in order to battery core, discharging current shunting is used.
Lithium battery group of the present invention also comprises voltage measurement module, current measurement module, total discharge switch, microcontroller, described voltage measurement module is connected with described independent battery node, for delivering to microcontroller by after the node output voltage amplification filtering of independent battery node; Described current measurement module is for measuring the current signal of independent battery node; Described microcontroller is connected with total discharge switch, for controlling the break-make of total discharge switch.
Described charging power modules is regular tap power supply or linear stabilized power supply.
Described charge protector and buffer circuit can be located at charge independence inside modules, or are located at charge independence module-external.
Described control of discharge module is control integration circuit (IC) or microprocessor (MCU), it contains boost module, discharge switch and under-voltage detection module.
Described buffer circuit can be the electronic building brick of the multi-form congenerous such as diode or metal-oxide layer-semiconductor-field-effect transistor (being called for short metal-oxide half field effect transistor, MOSFET).
Compared with prior art, one or more charging battery core that is identical or not identical characteristics can be carried out charge and discharge operation by the lithium battery group of charge independence discharged in series of the present invention, and charge with parallel way between each independent battery node, discharge in a series arrangement, when can guarantee that charge power supply accesses by charge protector, discharge loop disconnects, and reaches separate object of charging between independent battery node; Whether independent battery node discharges depends primarily on the voltage of self; During battery undervoltage, cut off in battery discharge loop by control of discharge module, external discharge stream flows through from electric discharge bypass circuit, thus reaches the object of under-voltage protection; When charging, the lithium battery group of charge independence discharged in series of the present invention can guarantee that each battery core can be full of, and not easily occur the problem that overcharges; Can determine the need of external output current according to battery core its voltage when discharging, thus guarantee making full use of of each battery core electricity; In addition, the present invention also can realize different qualities different capabilities charging battery core use with.
The present invention has the advantages such as battery core utilance is high, long service life.
Accompanying drawing explanation
Below by with reference to accompanying drawing describe the present invention particularly in conjunction with example, advantage of the present invention and implementation will be more obvious, wherein content shown in accompanying drawing is only for explanation of the present invention, and does not form restriction of going up in all senses of the present invention, in the accompanying drawings:
Fig. 1 is the first example structure schematic diagram of charge independence discharged in series battery pack of the present invention;
Fig. 2 is the structural representation of independent battery node in charge independence discharged in series battery pack of the present invention;
Fig. 3 is charge independence discharged in series battery pack second example structure schematic diagram of the present invention;
In figure:
1, charge battery core 2, control of discharge module 3, electric discharge bypass circuit
4, charge independence module 5, independent battery node 6, charging power modules
7, buffer circuit 8, charging positive terminal 9, charging negative pole end
10, discharge positive terminal 11, electric discharge negative pole end 12, charge protector
13, voltage measurement module 14, microcontroller 15, PC
16, total discharge switch 17, current measurement module
Embodiment
Embodiment one:
As depicted in figs. 1 and 2, the lithium battery group of a kind of charge independence discharged in series of the present embodiment, can by multiple identical or identical characteristics charging battery core is not used in combination, and this battery pack comprises charging power modules 6 and several independent battery nodes 5; Described charging power modules 6 is electrically connected, for it provides stable charging voltage with independent battery node 5; Charging positive terminal 8 and the charging negative pole end 9 of described independent battery node 5 are connected in parallel, and electric discharge positive terminal 10 and electric discharge negative pole end 11 are connected in series; Described independent battery node 5 comprises charging battery core 1, charge independence module 4, control of discharge module 2, charge protector 12 and electric discharge bypass circuit 3; Described charge independence module 4 is electrically connected with charging battery core 1, in order to charge to battery core, is provided with buffer circuit 7 in described charge independence module 4, fills in order to intercept between each independent battery node 5 inverse; Described charge protector 12 is connected with charge independence module 4, in order to detect the operating state of charge independence module 4; Described control of discharge module 2 is electrically connected, in order to the break-make of controlled discharge electric current with charge protector 12; Described electric discharge bypass circuit 3 is electrically connected with control of discharge module 2, and time under-voltage in order to battery core, discharging current shunting is used; Described charging power modules is linear stabilized power supply; Described charge protector and buffer circuit are all arranged at charge independence inside modules; Described control of discharge module is control integration circuit, it contains boost module, discharge switch and under-voltage detection module; Described buffer circuit is metal-oxide layer-semiconductor-field-effect transistor (being called for short metal-oxide half field effect transistor, MOSFET).
Charge independence module 4 is charging battery core 1 charge independence, by the buffer circuit 7 arranged in charge independence module 4, fill in order to intercept the inverse of power supply between independent battery node 5, charge protector 12 and charge independence module 4 are electrically connected, sending a triggering signal when charging to control of discharge module 2, causing it to disconnect discharge loop; Controlled the break-make of the external discharging current of charging battery core 1 by control of discharge module 2, can receive the control signal of charge protector 12 simultaneously, disconnect when charge independence module 4 works, when charging battery core 1 is under-voltage, discharge loop also disconnects.Electric discharge bypass circuit 3 is electrically connected with charging battery core 1, and when battery core 1 of charging occurs under-voltage, discharge loop disconnects, charging battery core 1 is excised from discharge loop, discharging current flows through from electric discharge bypass circuit 3, and switch power module 6 and independent battery node 5 are electrically connected, and provide stable charging voltage; The output cathode end of charge independence module 4 is connected with negative pole end with the positive terminal of charging battery core 1 respectively with negative pole end, reaches the object of charge independence with this.
Embodiment two:
Figure 3 shows that second embodiment of the invention structural representation, the lithium battery group of a kind of charge independence discharged in series of the present embodiment, comprise charging power modules 6 and several independent battery nodes 5, also comprise voltage measurement module 13, current measurement module 17, total discharge switch 16, microcontroller 14, described voltage measurement module 13 is connected with described independent battery node 5, for delivering to microcontroller 14 by after the node output voltage amplification filtering of independent battery node 5; Described current measurement module 17 is for measuring the current signal of independent battery node 5; Described microcontroller 14 is connected with total discharge switch 16, for controlling the break-make of total discharge switch 16; Remaining with embodiment one.
The node output voltage of each independent battery node 5 delivers to microcontroller 14 after voltage measurement module 13 amplification filtering, the output voltage of each isolated node 5 is converted into the battery core voltage of each charging battery core 1 by the ADC module of microcontroller, obtain current signal in conjunction with from current measurement module 17, thus calculate the dump energy of battery pack.Microcontroller 14, by signal integrations such as battery core voltage, electric current and electricity, draws the running status of whole battery pack, and then the break-make of controlled discharge switch 16; In addition, battery pack running state information can deliver to PC 15 through RS232 interface, to check battery state by upper computer software.
In sum, the lithium battery group of charge independence discharged in series of the present invention by the independent battery node 5 of one or more identical characteristics or non-identical characteristics with the interconnected setting of parallel way, each module is provided with charge independence module 4, with thinking that chargeable battery 1 carries out charge independence, wherein buffer circuit 7 can prevent independent battery internodal against filling; And its control of discharge mechanism can be managed voluntarily through the control of discharge module 2 that each independent battery node 1 is set, reach the independent battery node 5 of one or more above identical characteristics or non-identical characteristics can be carried out charge and discharge operation simultaneously.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the scope of the invention change and improve, and all should still belong within this patent covering scope.
Claims (7)
1. a lithium battery group for charge independence discharged in series, is characterized in that: comprise charging power modules and at least one independent battery node; Described charging power modules and independent battery node are electrically connected, for it provides stable charging voltage; Charging positive terminal and the charging negative pole end of described independent battery node are connected in parallel, and electric discharge positive terminal and electric discharge negative pole end are connected in series;
Described independent battery node comprises charging battery core, charge independence module, control of discharge module, charge protector and electric discharge bypass circuit; Described charge independence module is electrically connected with charging battery core, in order to charge to battery core, is provided with buffer circuit in described charge independence module, in order to intercept between each independent battery node against filling; Described charge protector and charge independence model calling, in order to detect the operating state of charge independence module; Described control of discharge module and charge protector are electrically connected, in order to the break-make of controlled discharge electric current; Described electric discharge bypass circuit and control of discharge module are electrically connected, and time under-voltage in order to battery core, discharging current shunting is used.
2. the lithium battery group of charge independence discharged in series according to claim 1, is characterized in that: described charge protector and buffer circuit are all arranged at charge independence inside modules.
3. the lithium battery group of charge independence discharged in series according to claim 1, is characterized in that: described charge protector and buffer circuit are all arranged at charge independence module-external.
4. the lithium battery group of charge independence discharged in series according to claim 1, it is characterized in that: also comprise voltage measurement module, current measurement module, total discharge switch, microcontroller, described voltage measurement module is connected with described independent battery node, for delivering to microcontroller by after the node output voltage amplification filtering of independent battery node; Described current measurement module is for measuring the current signal of independent battery node; Described microcontroller is connected with total discharge switch, for controlling the break-make of total discharge switch.
5. the lithium battery group of charge independence discharged in series according to claim 1, is characterized in that: described charging power modules is regular tap power supply or linear stabilized power supply.
6. the lithium battery group of charge independence discharged in series according to claim 1, is characterized in that: described control of discharge module is control integration circuit or microprocessor.
7. the lithium battery group of the charge independence discharged in series according to claim arbitrary in claims 1 to 3, is characterized in that: described buffer circuit is diode or metal-oxide half field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510005564.9A CN104505905A (en) | 2015-01-06 | 2015-01-06 | Single-charged and series-discharged lithium battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510005564.9A CN104505905A (en) | 2015-01-06 | 2015-01-06 | Single-charged and series-discharged lithium battery pack |
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| CN104505905A true CN104505905A (en) | 2015-04-08 |
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| CN201510005564.9A Pending CN104505905A (en) | 2015-01-06 | 2015-01-06 | Single-charged and series-discharged lithium battery pack |
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Cited By (9)
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| TWI581485B (en) * | 2016-03-29 | 2017-05-01 | 陳文全 | A device for a battery assembly |
| CN106655393A (en) * | 2017-01-05 | 2017-05-10 | 奇酷互联网络科技（深圳）有限公司 | Charging apparatus and mobile terminal |
| CN107635339A (en) * | 2017-10-27 | 2018-01-26 | 桂林电子科技大学 | A kind of mining illuminating lamp tool of replaceable battery and the charging management method of the light fixture |
| CN109659465A (en) * | 2019-01-30 | 2019-04-19 | 哈尔滨格瑞赛科新能源有限公司 | A kind of battery strings module of electric automobile power battery system |
| CN112874384A (en) * | 2021-02-26 | 2021-06-01 | 重庆星座汽车科技有限公司 | Parallel charging circuit |
| CN112952968A (en) * | 2021-04-21 | 2021-06-11 | 五羊—本田摩托（广州）有限公司 | Electricity storage device and electric vehicle power supply system comprising same |
| CN113708472A (en) * | 2021-07-23 | 2021-11-26 | 西安特锐德智能充电科技有限公司 | Power supply circuit and control method and control system thereof |
| CN115389322A (en) * | 2022-08-25 | 2022-11-25 | 东北大学 | Bidirectional synchronous loading method for true triaxial tester |
| TWI807470B (en) * | 2021-11-03 | 2023-07-01 | 國立虎尾科技大學 | Range-extender powertrain system that charges electric vehicles while driving and charging method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI581485B (en) * | 2016-03-29 | 2017-05-01 | 陳文全 | A device for a battery assembly |
| CN106655393A (en) * | 2017-01-05 | 2017-05-10 | 奇酷互联网络科技（深圳）有限公司 | Charging apparatus and mobile terminal |
| CN107635339A (en) * | 2017-10-27 | 2018-01-26 | 桂林电子科技大学 | A kind of mining illuminating lamp tool of replaceable battery and the charging management method of the light fixture |
| CN109659465A (en) * | 2019-01-30 | 2019-04-19 | 哈尔滨格瑞赛科新能源有限公司 | A kind of battery strings module of electric automobile power battery system |
| CN112874384A (en) * | 2021-02-26 | 2021-06-01 | 重庆星座汽车科技有限公司 | Parallel charging circuit |
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| CN112952968A (en) * | 2021-04-21 | 2021-06-11 | 五羊—本田摩托（广州）有限公司 | Electricity storage device and electric vehicle power supply system comprising same |
| CN113708472A (en) * | 2021-07-23 | 2021-11-26 | 西安特锐德智能充电科技有限公司 | Power supply circuit and control method and control system thereof |
| TWI807470B (en) * | 2021-11-03 | 2023-07-01 | 國立虎尾科技大學 | Range-extender powertrain system that charges electric vehicles while driving and charging method thereof |
| CN115389322A (en) * | 2022-08-25 | 2022-11-25 | 东北大学 | Bidirectional synchronous loading method for true triaxial tester |
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Application publication date: 20150408 |