CN105048568A - Circuit and method for solving problems of mutual charging and discharging of multiple battery packs - Google Patents
Circuit and method for solving problems of mutual charging and discharging of multiple battery packs Download PDFInfo
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- CN105048568A CN105048568A CN201510481075.0A CN201510481075A CN105048568A CN 105048568 A CN105048568 A CN 105048568A CN 201510481075 A CN201510481075 A CN 201510481075A CN 105048568 A CN105048568 A CN 105048568A
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Abstract
The invention discloses a circuit and a method for solving problems of mutual charging and discharging of multiple battery packs. The circuit comprises a plurality of battery modules which are connected with one another in parallel, wherein each battery module comprises a battery, a charging metal oxide semiconductor (MOS) tube, a discharging MOS tube, a current detection module, a temperature sampling circuit, a temperature controlled switch module and a control module; a voltage sampling input end of each control module is connected with the corresponding battery; a current sampling input end of each control module is connected with the corresponding current detection module; a first MOS tube control output end of each control module is connected with the corresponding charging MOS tube; and a second MOS tube control output end of each control module is connected with the corresponding discharging MOS tube. Through control on opening and closing of the charging MOS tubes and the discharging MOS tubes, the problem that multiple battery packs which are different in voltage level are charged and discharged by one another due to parallel connection is solved; and charging and discharging full-cycle processes of each battery module are realized under the condition that all battery modules are all in a parallel bus loop.
Description
Technical field
The present invention relates to a kind of circuit and the method thereof that solve mutual discharge and recharge problem between multiple battery pack.
Background technology
Along with the consumption that is flourish, medium-sized, large-sized battery pack of electronic technology is increasing.And these battery pack production, test and use procedure in, many charging and discharging processes be used.
There is following shortcoming in existing charging device or discharge equipment:
1, battery pack needs to use the battery modules of same model to carry out parallel connection use, and battery pack namely in parallel requires that each cell voltage is identical, the battery modules of complete different type, electric pressure can not be carried out input and output in parallel.Because in battery pack, the difference between monomer always exists, and for capacity, its otherness is tending towards disappearing never, but progressively worsen.Same electric current is flow through in battery pack, comparatively speaking, the large person of capacity be always in small area analysis shallow fill shallowly to put, be tending towards capacity attenuation slowly, life, and the little person of capacity is always in big current super-charge super-discharge, is tending towards capacity attenuation quickening, the lost of life, performance parameter difference is increasing between the two, form positive feedback characteristic, low capacity premature failure, the group lost of life.
2, the discharge and recharge step of battery pack cannot reach the function of complete alternation, and the use of battery pack is bothered.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, circuit and the method thereof of mutual discharge and recharge problem between the multiple battery pack of a kind of simple, that convenient operation, reliability are strong solution are provided, solve the problem that prior art cannot realize complete alternation discharge and recharge.
The object of the invention is to be achieved through the following technical solutions: a kind of circuit solving mutual discharge and recharge problem between multiple battery pack, comprises the battery modules of multiple parallel connection, described battery modules adopts positive and negative two line input and output; Described battery modules comprises battery, charging MOS, electric discharge MOS, current detection module, temperature sampling circuit, temp control switch and control module, described charging metal-oxide-semiconductor, electric discharge metal-oxide-semiconductor, current detection module, temp control switch and serial battery form, and the temperature of described temperature sampling circuit to battery modules is sampled; The voltage sample input of described control module is connected with battery, the current sample input of control module is connected with current detection module, the temperature sampling input of control module is connected with temperature sampling circuit, first metal-oxide-semiconductor control output end of control module is connected with charging metal-oxide-semiconductor, second metal-oxide-semiconductor control output end of control module is connected with electric discharge metal-oxide-semiconductor, and the temperature detect switch (TDS) output of control module is connected with temp control switch.
Described current detection module comprises current sense resistor RSC.
Described battery modules is the battery modules of identical or dissimilar electric pressure.
Described battery is made up of multiple battery unit be in series.
Described temperature sampling circuit is arranged in the battery core of battery.
Solve a method for the circuit of mutual discharge and recharge problem between multiple battery pack, comprise batteries charging step, battery power discharge step and protection step;
Described battery power discharge step comprises following sub-step:
S11: before discharge process, all charging metal-oxide-semiconductors are in closed condition, and all electric discharge metal-oxide-semiconductors are in opening, and all battery modules are got up by the diodes in parallel of the course of discharge that charging metal-oxide-semiconductor inside allows;
S12: start electric discharge, the battery modules that voltage is the highest is discharged at first; Control module is sampled to the electric current through current detection module, also samples to the voltage of battery:
(1) when control module detects the discharging current through current detection module, charging metal-oxide-semiconductor is placed in opening by control module, adds electric discharge sequence in parallel by this battery modules; Until all charging metal-oxide-semiconductors are all in opening, realize all battery modules in parallel electric discharges;
(2) when control module detects that the voltage of battery reaches overdischarge thresholding, electric discharge metal-oxide-semiconductor is placed in closed condition by control module; Until all electric discharge metal-oxide-semiconductors are in closed condition, represent that all battery modules have all been discharged;
Described batteries charging step comprises following sub-step:
S21: before charging process, all charging metal-oxide-semiconductors are in opening, and all electric discharge metal-oxide-semiconductors are in closed condition, and all battery modules are all together in parallel by the diode in the charging direction that electric discharge metal-oxide-semiconductor inside allows;
S22: start charging, first charging current enters the minimum battery modules of voltage; Control module is sampled to the electric current through current detection module, also samples to the voltage of battery:
(1) when control module detects the charging current through current detection module, electric discharge metal-oxide-semiconductor is placed in opening by control module, adds charging sequence in parallel by this battery modules; Until all electric discharge metal-oxide-semiconductors are all in opening, realize all battery modules in parallel chargings;
(2) when control module detects that the voltage of battery reaches overcharge thresholding, charging metal-oxide-semiconductor is placed in closed condition by control module; Until all charging metal-oxide-semiconductors are in closed condition, represent that all battery modules bulk charges complete.
Described protection step is: in the process that batteries charging step, battery power discharge step are carried out, the temperature of described temperature sampling circuit to battery modules is sampled, and when temperature is too high, control module control temperature control switch cuts off.
The invention has the beneficial effects as follows:
(1) the present invention is not overcharging on the basis of only putting, solve with electric discharge metal-oxide-semiconductor method for opening and closing the problem that the meeting parallel with one another of multiple battery modules causes mutual discharge and recharge by controlling charging metal-oxide-semiconductor, or even the parallel connection of the battery modules of complete different type voltage grade.
(2) present invention achieves when all battery modules all in a bus bar circuit in parallel, export only have positive and negative two lines, each battery modules all can realize the total recycle process of charge and discharge: the charging metal-oxide-semiconductor after charge step completes is identical with the initial condition of discharge step with the open and-shut mode of electric discharge metal-oxide-semiconductor, and the charging metal-oxide-semiconductor in like manner after discharge step completes is identical with the initial condition of charge step with the open and-shut mode of electric discharge metal-oxide-semiconductor.
(3) the present invention also comprises temperature sampling circuit for the protection of battery modules and temp control switch, disconnects this battery modules, have fail safe when the temperature of battery modules is higher.
(4) the present invention is simple, convenient operation, and reliability is strong.
Accompanying drawing explanation
Fig. 1 is block diagram of the present invention;
Fig. 2 is battery modules circuit diagram;
Fig. 3 is the inventive method flow chart;
Fig. 4 is that electric discharge completes equivalent circuit diagram;
Fig. 5 is charging complete equivalent circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail: as shown in Figure 1, a kind of circuit solving mutual discharge and recharge problem between multiple battery pack, comprises the battery modules of multiple parallel connection, and described battery modules adopts positive and negative two line input and output; As shown in Figure 2, described battery modules comprises battery, charging MOS, electric discharge MOS, current detection module, temperature sampling circuit, temp control switch and control module, described charging metal-oxide-semiconductor, electric discharge metal-oxide-semiconductor, current detection module, temp control switch and serial battery form, and the temperature of described temperature sampling circuit to battery modules is sampled; The voltage sample input of described control module is connected with battery, the current sample input of control module is connected with current detection module, the temperature sampling input of control module is connected with temperature sampling circuit, first metal-oxide-semiconductor control output end of control module is connected with charging metal-oxide-semiconductor, second metal-oxide-semiconductor control output end of control module is connected with electric discharge metal-oxide-semiconductor, and the temperature detect switch (TDS) output of control module is connected with temp control switch.
Described current detection module comprises current sense resistor RSC.
Described battery modules is the battery modules of identical or dissimilar electric pressure.
Described battery is made up of multiple battery unit be in series.
Described temperature sampling circuit is arranged in the battery core of battery.
As shown in Figure 3, a kind of method solving the circuit of mutual discharge and recharge problem between multiple battery pack, comprises batteries charging step, battery power discharge step and protection step;
Described battery power discharge step comprises following sub-step:
S11: before discharge process, all charging metal-oxide-semiconductors are in closed condition, and all electric discharge metal-oxide-semiconductors are in opening, and all battery modules are got up by the diodes in parallel of the course of discharge that charging metal-oxide-semiconductor inside allows;
S12: start electric discharge, due to the relation of voltage competition, the battery modules that voltage is the highest is discharged at first; Control module is sampled to the electric current through current detection module, also samples to the voltage of battery:
(1) when control module detects the discharging current through current detection module, charging metal-oxide-semiconductor is placed in opening by control module, adds electric discharge sequence in parallel by this battery modules, avoids charging metal-oxide-semiconductor to bear discharging current; Until all charging metal-oxide-semiconductors are all in opening, realize all battery modules in parallel electric discharges;
(2) when control module detects that the voltage of battery reaches overdischarge thresholding, electric discharge metal-oxide-semiconductor is placed in closed condition by control module, and electric discharge metal-oxide-semiconductor now plays not overdischarge; Until all electric discharge metal-oxide-semiconductors are in closed condition, represent that all battery modules have all been discharged, equivalent circuit diagram as shown in Figure 4.
After electric discharge completes, charging metal-oxide-semiconductor is in opening, and electric discharge metal-oxide-semiconductor is in closed condition, identical with the initial condition of the metal-oxide-semiconductor that discharges with the charging metal-oxide-semiconductor required for charge battery step.
Described batteries charging step comprises following sub-step:
S21: before charging process, all charging metal-oxide-semiconductors are in opening, and all electric discharge metal-oxide-semiconductors are in closed condition, and all battery modules are all together in parallel by the diode in the charging direction that electric discharge metal-oxide-semiconductor inside allows;
S22: start charging, due to the relation of voltage competition, first charging current enters the minimum battery modules of voltage; Control module is sampled to the electric current through current detection module, also samples to the voltage of battery:
(1) when control module detects the charging current through current detection module, electric discharge metal-oxide-semiconductor is placed in opening by control module, adds charging sequence in parallel by this battery modules; Until all electric discharge metal-oxide-semiconductors are all in opening, realize all battery modules in parallel chargings;
(2) when control module detects that the voltage of battery reaches overcharge thresholding, charging metal-oxide-semiconductor is placed in closed condition by control module, and charging metal-oxide-semiconductor now plays not overcharge; Until all charging metal-oxide-semiconductors are in closed condition, represent that all battery modules bulk charges complete, equivalent circuit diagram as shown in Figure 5.
After charging complete, electric discharge metal-oxide-semiconductor is in opening, and charging metal-oxide-semiconductor is in closed condition, identical with the initial condition of the metal-oxide-semiconductor that discharges with the charging metal-oxide-semiconductor required for battery discharge step.
Described protection step is: in the process that batteries charging step, battery power discharge step are carried out, the temperature of described temperature sampling circuit to battery modules is sampled, and when temperature is too high, control module control temperature control switch cuts off.
Claims (6)
1. solve a circuit for discharge and recharge problem mutually between multiple battery pack, it is characterized in that: the battery modules comprising multiple parallel connection, described battery modules adopts positive and negative two line input and output; Described battery modules comprises battery, charging MOS, electric discharge MOS, current detection module, temperature sampling circuit, temp control switch and control module, described charging metal-oxide-semiconductor, electric discharge metal-oxide-semiconductor, current detection module, temp control switch and serial battery form, and the temperature of described temperature sampling circuit to battery modules is sampled; The voltage sample input of described control module is connected with battery, the current sample input of control module is connected with current detection module, the temperature sampling input of control module is connected with temperature sampling circuit, first metal-oxide-semiconductor control output end of control module is connected with charging metal-oxide-semiconductor, second metal-oxide-semiconductor control output end of control module is connected with electric discharge metal-oxide-semiconductor, and the temperature detect switch (TDS) output of control module is connected with temp control switch.
2. a kind of circuit solving mutual discharge and recharge problem between multiple battery pack according to claim 1, is characterized in that: described current detection module comprises current sense resistor RSC.
3. a kind of circuit solving mutual discharge and recharge problem between multiple battery pack according to claim 1, is characterized in that: described battery modules is the battery modules of identical or dissimilar electric pressure.
4. a kind of circuit solving mutual discharge and recharge problem between multiple battery pack according to claim 1, is characterized in that: described battery is made up of multiple battery unit be in series.
5. a kind of circuit solving mutual discharge and recharge problem between multiple battery pack according to claim 1, is characterized in that: described temperature sampling circuit is arranged in the battery core of battery.
6. as a kind of method solving the circuit of mutual discharge and recharge problem between multiple battery pack in claim 1 ~ 5 as described in any one, it is characterized in that: comprise batteries charging step, battery power discharge step and protection step;
Described battery power discharge step comprises following sub-step:
S11: before discharge process, all charging metal-oxide-semiconductors are in closed condition, and all electric discharge metal-oxide-semiconductors are in opening, and all battery modules are got up by the diodes in parallel of the course of discharge that charging metal-oxide-semiconductor inside allows;
S12: start electric discharge, the battery modules that voltage is the highest is discharged at first; Control module is sampled to the electric current through current detection module, also samples to the voltage of battery:
(1) when control module detects the discharging current through current detection module, charging metal-oxide-semiconductor is placed in opening by control module, adds electric discharge sequence in parallel by this battery modules; Until all charging metal-oxide-semiconductors are all in opening, realize all battery modules in parallel electric discharges;
(2) when control module detects that the voltage of battery reaches overdischarge thresholding, electric discharge metal-oxide-semiconductor is placed in closed condition by control module; Until all electric discharge metal-oxide-semiconductors are in closed condition, represent that all battery modules have all been discharged;
Described batteries charging step comprises following sub-step:
S21: before charging process, all charging metal-oxide-semiconductors are in opening, and all electric discharge metal-oxide-semiconductors are in closed condition, and all battery modules are all together in parallel by the diode in the charging direction that electric discharge metal-oxide-semiconductor inside allows;
S22: start charging, first charging current enters the minimum battery modules of voltage; Control module is sampled to the electric current through current detection module, also samples to the voltage of battery:
(1) when control module detects the charging current through current detection module, electric discharge metal-oxide-semiconductor is placed in opening by control module, adds charging sequence in parallel by this battery modules; Until all electric discharge metal-oxide-semiconductors are all in opening, realize all battery modules in parallel chargings;
(2) when control module detects that the voltage of battery reaches overcharge thresholding, charging metal-oxide-semiconductor is placed in closed condition by control module; Until all charging metal-oxide-semiconductors are in closed condition, represent that all battery modules bulk charges complete;
Described protection step is: in the process that batteries charging step, battery power discharge step are carried out, the temperature of described temperature sampling circuit to battery modules is sampled, and when temperature is too high, control module control temperature control switch cuts off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481075.0A CN105048568B (en) | 2015-08-03 | 2015-08-03 | It is a kind of to solve the problems, such as between multiple battery packs the mutually circuit and its method of discharge and recharge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510481075.0A CN105048568B (en) | 2015-08-03 | 2015-08-03 | It is a kind of to solve the problems, such as between multiple battery packs the mutually circuit and its method of discharge and recharge |
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| CN105048568A true CN105048568A (en) | 2015-11-11 |
| CN105048568B CN105048568B (en) | 2018-03-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193910A (en) * | 2018-10-19 | 2019-01-11 | 上海航天能源股份有限公司 | A kind of battery switching circuit and battery switching method |
| CN109450008A (en) * | 2018-09-26 | 2019-03-08 | 同济大学 | A kind of circuit reducing the extension harm of batteries in parallel connection group thermal runaway |
| CN110752645A (en) * | 2019-11-25 | 2020-02-04 | 广东博力威科技股份有限公司 | Parallel charging and discharging management system for multiple batteries |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014003759A (en) * | 2012-06-15 | 2014-01-09 | Toyota Motor Corp | Power source control device |
| CN103795104A (en) * | 2012-10-30 | 2014-05-14 | 株式会社日立信息通信工程 | Power storage system and power source system |
-
2015
- 2015-08-03 CN CN201510481075.0A patent/CN105048568B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014003759A (en) * | 2012-06-15 | 2014-01-09 | Toyota Motor Corp | Power source control device |
| CN103795104A (en) * | 2012-10-30 | 2014-05-14 | 株式会社日立信息通信工程 | Power storage system and power source system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450008A (en) * | 2018-09-26 | 2019-03-08 | 同济大学 | A kind of circuit reducing the extension harm of batteries in parallel connection group thermal runaway |
| CN109193910A (en) * | 2018-10-19 | 2019-01-11 | 上海航天能源股份有限公司 | A kind of battery switching circuit and battery switching method |
| CN110752645A (en) * | 2019-11-25 | 2020-02-04 | 广东博力威科技股份有限公司 | Parallel charging and discharging management system for multiple batteries |
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| CN105048568B (en) | 2018-03-20 |
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Effective date of registration: 20200810 Address after: 427000 building 18 standard factory building, Zone C, Zhangjiajie Economic Development Zone, Zhangjiajie City, Hunan Province Patentee after: Hunan xilaike Electric Power Technology Co.,Ltd. Address before: High tech Zone Gaopeng road in Chengdu city of Sichuan province 610017 5 block A No. 2 public platform Secretary A-301 Patentee before: SICHUAN NEW ENERGY EXCHANGE TECHNOLOGY Co.,Ltd. |
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Address after: 427000 18 standard workshops in Zone C of Zhangjiajie Economic Development Zone, Zhangjiajie City, Hunan Province Patentee after: Hunan xilaike Electric Power Technology Co.,Ltd. Address before: 427000 18 standard workshops in Zone C of Zhangjiajie Economic Development Zone, Zhangjiajie City, Hunan Province Patentee before: Hunan xilaike Electric Power Technology Co.,Ltd. |