CN203339727U - Battery pack overcharging-prevention control circuit - Google Patents
Battery pack overcharging-prevention control circuit Download PDFInfo
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- CN203339727U CN203339727U CN2013202408482U CN201320240848U CN203339727U CN 203339727 U CN203339727 U CN 203339727U CN 2013202408482 U CN2013202408482 U CN 2013202408482U CN 201320240848 U CN201320240848 U CN 201320240848U CN 203339727 U CN203339727 U CN 203339727U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a battery pack overcharging-prevention control circuit. The battery pack overcharging-prevention control circuit comprises charging circuits connected with a power line and further respectively connected with at least two batteries; a voltage detection circuit connected with the batteries; a voltage comparator connected with the output end of the voltage detection circuit; a controller connected with the voltage comparator and further connected with the charging circuits; a current sharing circuit connected with the charging circuits and meanwhile connected with the controller; a capacity detector connected with the batteries; a capacity comparator connected with the capacity detector; and a charging stop signal generation circuit connected with the capacity comparator and one charging circuit. The battery pack overcharging-prevention control circuit can keep a balance between the charging processes of batteries during a battery pack charging process. After the batteries are fully charged, the battery pack overcharging-prevention control circuit can make the charging circuits disconnected in a timely manner and thus effectively prevent overcharging conditions.
Description
Technical field
The application relates to battery pack control technology field, particularly relates to the anti-overcharge control circuit of a kind of battery pack.
Background technology
Ferric phosphate lithium cell is the novel secondary power supply that new development is in recent years got up, its major advantage is that input-output power is large, operating temperature range is wide, memory-less effect, reach extra long life environmental protection more than 2000 times and the characteristics such as the floating charge characteristic is outstanding, is widely used in electric automobile and energy-accumulating power station field.
But ferric phosphate lithium cell is when high power charging-discharging, actual specific capacity is low, so although ferric phosphate lithium cell has above-mentioned multiple advantages, but be applied in the back-up source field, particularly the station of transformer station is when the back-up source field, and advantage is not obvious, and that can not effectively carry out ferric phosphate lithium cell shallowly fills shallow putting, the situation that high magnification charges and discharge easily occurs, thereby can not effectively maintain physical characteristic and the chemical characteristic of ferric phosphate lithium cell.
After the object characteristic of a certain battery and chemical characteristic change, will difference between the battery in battery pack individuality, so will cause some battery the phenomenon of overdischarge to occur for a long time.Be also the same carrying out charging process, do not charged if do not consider the difference condition between battery cell, may cause single battery situation about overcharging to occur.If the long-term overdischarge of single battery or overcharge, its battery capacity will reduce, and will shorten useful life, and the consistency of whole Battery pack will be damaged, thereby shortens the life-span of battery pack.
The utility model content
In view of this, the embodiment of the present application provides a kind of battery pack anti-overcharge control circuit, to realize that in battery pack, each battery cell can equalizing charge.
To achieve these goals, the technical scheme that the embodiment of the present application provides is as follows:
The anti-overcharge control circuit of a kind of battery pack, described battery pack comprises at least two battery cells, comprising:
The charging circuit that input is connected with power line, output is connected with at least two described battery cells respectively;
Input is connected with described battery cell, for the voltage detecting circuit of the voltage that gathers at least two described battery cells;
Input is connected with the output of described voltage detecting circuit, for calculating the average voltage of at least two described battery cells, and described average voltage and predetermined voltage threshold are compared and obtain the first comparative result, and the voltage of at least two described battery cells is compared in twos, and obtain the voltage comparator of the second comparative result;
Input is connected with described voltage comparator, output is connected with charging circuit, be used for controlling the charging voltage of described charging circuit and the size of charging current according to described the first comparative result, and generate the controller of current-sharing signal according to described the second comparative result;
Be connected with a plurality of described charging circuits, and be connected with described controller, for the flow equalizing circuit of the charging current according to a plurality of described charging circuits of described current-sharing signal controlling;
With described battery cell, be connected, for detection of the capacity check device of described battery cell battery capacity;
With described capacity check device, be connected, the capacity comparator compared for battery capacity and preset battery capacity being detected;
Be connected with described capacity comparator, and be connected with described charging circuit, for when battery capacity being detected and equal preset battery capacity, generating and stop charging signals, and send to described charging circuit stop the charging signals generative circuit.
Preferably, described voltage comparator comprises:
For described average voltage and the first predetermined voltage threshold, the second predetermined voltage threshold are compared to the first voltage comparator that obtains the first comparative result;
For the voltage of at least two described battery cells is compared to the second voltage comparator that obtains the second comparative result in twos.
Preferably, described controller comprises:
Input is connected with the output of the first voltage comparator, second voltage comparator, equal the first predetermined voltage threshold for control described charging voltage when described average voltage is less than described the first predetermined voltage threshold, perhaps, control described charging voltage when described average voltage is being more than or equal to the first predetermined voltage threshold and be less than between the second predetermined voltage threshold and equal the second predetermined voltage threshold; Perhaps, when equaling described the second predetermined voltage threshold, described average voltage controls the voltage control circuit that described charging voltage equals the first voltage threshold;
Input is connected with the output of the first voltage comparator, second voltage comparator, between 0.1C～0.2C, or when being more than or equal to described the first predetermined voltage threshold, described average voltage controls the current control circuit that the charging current of described charging circuit is 0.01C for the charging current of controlling described charging circuit when described average voltage is less than described the first predetermined voltage threshold;
With described voltage comparator, be connected, for the voltage that judges some battery cells whether higher than the first comparator of other battery cells in described battery pack;
Be connected with described the first comparator, for the voltage when some battery cells, whether higher than in described battery pack during other battery cells, generate the first trigger of current-sharing signal.
Preferably, described the first predetermined voltage threshold is 3.42V, and described the second predetermined voltage threshold is 3.6V.
Preferably, further comprise: with described voltage detecting circuit, be connected, for but described average voltage is less than the first predetermined voltage threshold and charging current between 0.1C～0.2C the time, generate the first time-delay command and send to described voltage detecting circuit, perhaps, when described average voltage is more than or equal to the first predetermined voltage threshold and is less than the second predetermined voltage threshold and charging current during at 0.01C, generate the second time-delay command and send to described voltage detecting circuit; Perhaps, when stating average voltage and equal the second predetermined voltage threshold, generate the 3rd time-delay command and send to the delay controller of described voltage detecting circuit.
Preferably, the delay time in described the first time-delay command and the second time-delay command is 0～1 hour, and the time expand in described the 3rd time-delay command is 0.5～24 hour.
Preferably, described flow equalizing circuit comprises a plurality of resistance and a plurality of diverter switch, wherein:
Each described charging circuit all is in series with at least one resistance, and each resistance all forms a diverter branch with a diverter switch;
The control end of each diverter switch is connected with described controller, in described current-sharing signal, includes switching signal, and described diverter switch is controlled by switching signal in described current-sharing signal.
Preferably, described controller also comprises:
Be connected with described voltage comparator, whether be less than the second comparator of predetermined threshold value for the voltage difference that judges the batteries monomer in described battery pack;
Be connected with described the second comparator, while for the voltage difference of the batteries monomer in described battery pack, being less than predetermined threshold value, generating the diverter switch restoring signal and send to the second trigger of described flow equalizing circuit.
Preferably, the described charging signals generative circuit that stops is the level maker.
By above technical scheme, visible, the anti-overcharge control circuit of this battery pack that the embodiment of the present application provides, at first gather the voltage of the interior all battery cells of battery pack in charging process, then calculate the average voltage of all battery cells, and the average voltage and the predetermined voltage threshold that calculate are compared, according to the different result relatively obtained, change charging voltage and the charging current of charging circuit, be equivalent to set different charge modes or charging gear for charging circuit, and then can to charge condition, be controlled according to the voltage between battery cell in battery pack, realize between battery cell more balanced, and by judging in battery pack, whether charging rate battery cell faster appears, and generate the current-sharing signal and send to flow equalizing circuit, control and the charging rate charging current of battery cell faster occurs by flow equalizing circuit, in addition, by the capacity to battery cell, detected, when battery cell is full of, charging circuit can also be disconnected, avoid battery cell the situation of overcharging to occur.
Therefore, the anti-overcharge control circuit of this battery pack that the embodiment of the present application provides, not only can be in the batteries charging process, charging process to each battery cell is carried out balance, and after battery cell is full of, can also in time charging circuit be disconnected, and then can effectively avoid occurring situation about overcharging.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, the accompanying drawing the following describes is only some embodiment that put down in writing in the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the anti-overcharge control circuit of a kind of battery pack that Fig. 1 provides for the embodiment of the present application;
The structural representation of a kind of comparator that Fig. 2 provides for the embodiment of the present application;
The structural representation of a kind of controller that Fig. 3 provides for the embodiment of the present application;
The structural representation of the anti-overcharge control circuit of another kind of battery pack that Fig. 4 provides for the embodiment of the present application.
Embodiment
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all should belong to the scope of the application's protection.
Embodiment mono-:
The structural representation of the anti-overcharge control circuit of a kind of battery pack that Fig. 1 provides for the embodiment of the present application.
This control circuit, for the charging process of battery pack is controlled, so that each battery cell in battery pack is realized equalizing charge, for battery pack, comprises at least two battery cells.In Fig. 1,100 is battery pack, and 200 is battery cell, and 300 is the power line with batteries charging.
As shown in Figure 1, this control circuit comprises: comprising: charging circuit 1, voltage detecting circuit 2, voltage comparator 3, controller 4, flow equalizing circuit 5, battery capacity detector 6, capacity comparator 7 and stop charging signals generative circuit 8.
The input of described charging circuit 1 is connected with power line 300, the output of described charging circuit 1 is connected with at least two described battery cells 200 respectively, the effect of charging circuit 1 will be charged to battery cell after the voltage step-down on power line 300, current limitation, charging circuit 1, when specific implementation, can be the step-down current-limiting circuit usually.In addition, in the embodiment of the present application, each battery cell 200 can configure respectively a charging circuit 1.
The input of voltage detecting circuit 2 is connected with at least two described battery cells 200 respectively, and output is connected with described voltage comparator 3.The effect of voltage detecting circuit 2 is the voltage that gathers at least two described battery cells 200, and the voltage collected is sent to voltage comparator 3.
As shown in Figure 2, the structural representation of the comparator provided for the embodiment of the present application, in figure, comparator 3 comprises: the first voltage comparator 31 and second voltage comparator 32, wherein:
The output of the first voltage comparator 31 is connected with the input of voltage control circuit 43, current control circuit 44 respectively, and the first voltage comparator 31 is for comparing described average voltage and the first predetermined voltage threshold, the second predetermined voltage threshold;
As shown in Figure 3, the structural representation of the controller provided for the embodiment of the present application, in figure, controller 4 comprises: voltage control circuit 41, current control circuit 42, the first comparator 43 and the first trigger 44.
The output of comparator 3 is connected with the input of voltage control circuit 41, current control circuit 42 respectively; The output of voltage control circuit 41, current control circuit 42 is connected with charging circuit 1 respectively, and voltage control circuit 41, current control circuit 42 are for the charging voltage of controlling charging circuit 1 and the size of charging current.
When described average voltage is less than described the first predetermined voltage threshold, the charging voltage that described voltage control circuit is controlled described charging circuit equals the first predetermined voltage threshold, (meaning of C refers to the total capacity of storage battery here between 0.1C～0.2C for described current control circuit and charging current, the battery of 600mAh of take is example, and 0.01C is 6mA);
And, when described average voltage is more than or equal to the first predetermined voltage threshold and little the second predetermined voltage threshold, the charging voltage that described voltage control circuit is controlled described charging circuit equals the second predetermined voltage threshold, and described current control circuit and charging current are 0.01C;
In addition, when described average voltage equals the second predetermined voltage threshold, the charging voltage that described voltage control circuit is controlled described charging circuit equals the first predetermined voltage threshold, and described current control circuit and charging current are 0.01C.
In some specific embodiments, described the first predetermined voltage threshold is 3.42V, and described the second predetermined voltage threshold is 3.6V.
Like this in whole charging process, in whole charging process, first adopt the cut-off current of 3.42V upper voltage limit value and 0.1C～0.2C to batteries charging, first adopt the normal mold filling formula of the large current limliting of low pressure to be charged to battery pack, can carry out quick charge to battery pack; , after 3.42V charging current is reduced when average monomer voltage, after charging current is reduced to 0.01C, with the 0.01C electric current, battery is carried out to boost charge, adopt the supplement mode of the little current limliting of high pressure to be charged to battery pack; After the average voltage that is supplemented to battery cell reaches 3.6V, charging voltage is reduced to 3.42V, so just can be so that the ferric phosphate lithium cell charging voltage, when 3.42V～3.6V, makes cell voltage be and upwarps characteristic.So this by changing the method for charge mode, can first large current charge, and then low current charge, can be so that better harmonious between battery cell, especially to the battery with ferric phosphate lithium cell length of this plateau, in the During Process of Long-term Operation of battery pack, can reduce or the time delay battery cell between the inconsistent problem of capacity, improve the quality of battery pack.
The first comparator 43 is connected with described voltage comparator 3, for the voltage that judges some battery cells whether higher than other battery cells in described battery pack; And the first trigger 44 is connected with described the first comparator 43, for the voltage when some battery cells, whether higher than in described battery pack during other battery cells, generates the current-sharing signal, and the current-sharing signal is sent to flow equalizing circuit 5.In the specific implementation, the first trigger 44 can be level trigger etc.
Flow equalizing circuit 5 is connected with a plurality of charging circuits 1, and the effect of flow equalizing circuit 5 is the charging currents according to a plurality of charging circuits of current-sharing signal controlling, so to charging rate faster the charging rate of battery cell controlled.In the embodiment of the present application, flow equalizing circuit 5 can arrange separately, also can be arranged in a plurality of charging circuits 1.
When specific embodiment, flow equalizing circuit 5 can comprise the network of a plurality of resistance and a plurality of diverter switches, wherein, can wear at least one resistance in each charging circuit 1, each resistance can form a diverter branch with a diverter switch, whether the effect of resistance here is to carry out current limliting, and the effect of diverter switch is controlling resistance, be linked in charging circuit.Diverter switch can be the point control switches such as relay, the control end of diverter switch is connected with controller, in addition, in the current-sharing signal that controller generates, include switching signal, and diverter switch is subject to switching signal in described current-sharing signal control unlatching or close.
In addition, foregoing description be for some charging rates faster battery cell controlled, in addition, when a plurality of battery cells all occur that when abnormal, this Time Controller can generate the current-sharing signal of a plurality of abnormal battery cells being controlled for simultaneously.
Stop signal generative circuit 8 is connected with described capacity comparator 7, and be connected with described charging circuit 1, when battery capacity being detected and equal preset battery capacity, stop signal generative circuit 8 generates and stops charging signals, and send to described charging circuit 1, and control charging circuit 1 and stop charging, stop charging signals circuit 8 shown in Fig. 1 and be connected with a charging circuit 1, in actual the use, stop charging circuit 8 and be connected with each charging circuit 1.
In the embodiment of the present application, be provided with mains switch in charging circuit 1, and stopping charging signals generative circuit 8 can be the level maker, for example sawtooth waveforms or square wave maker, the charging signals that stops generated is level signal, the mains switch that utilizes this level signal just can trigger in charging circuit 1 disconnects, and then realizes stopping charging after battery cell has charged.In addition, in order to guarantee the bending upwards of battery cell, after stopping the charging signals generation, after all right time delay a period of time, then disconnect charging circuit.
By above technical scheme, visible, the anti-overcharge control circuit of this battery pack that the embodiment of the present application provides, at first gather the voltage of the interior all battery cells of battery pack in charging process, then calculate the average voltage of all battery cells, and the average voltage and the predetermined voltage threshold that calculate are compared, according to the different result relatively obtained, change charging voltage and the charging current of charging circuit, be equivalent to set different charge modes or charging gear for charging circuit, and then can to charge condition, be controlled according to the voltage between battery cell in battery pack, realize between battery cell more balanced, and by judging in battery pack, whether charging rate battery cell faster appears, and generate the current-sharing signal and send to flow equalizing circuit, control and the charging rate charging current of battery cell faster occurs by flow equalizing circuit, in addition, by the capacity to battery cell, detected, when battery cell is full of, charging circuit can also be disconnected, avoid battery cell the situation of overcharging to occur.
Therefore, the anti-overcharge control circuit of this battery pack that the embodiment of the present application provides, not only can be in the batteries charging process, charging process to each battery cell is carried out balance, and after battery cell is full of, can also in time charging circuit be disconnected, and then can effectively avoid occurring situation about overcharging.
Embodiment bis-:
Bring energy loss for fear of frequent detection batteries monomer voltage, in other embodiment of the application, can also, in the different mode charging process, set the interval time of detecting.
The structural representation of the anti-overcharge control circuit of another kind of battery pack that Fig. 4 provides for the embodiment of the present application.
As shown in Figure 4, this anti-overcharge control circuit can also comprise: delay controller 9, delay controller 4 is connected with voltage detecting circuit 2, for controlling the assay intervals of voltage detecting circuit.
When average voltage is less than the first predetermined voltage threshold and charging current between 0.1C～0.2C the time, generate the first time-delay command and send to described voltage detecting circuit, after controlling described voltage detecting circuit 2 time delay the first Preset Times, then detect the voltage of battery cell.
When average voltage is more than or equal to the first predetermined voltage threshold and is less than the second predetermined voltage threshold and charging current during at 0.01C, generate the second time-delay command and send to described voltage detecting circuit, after controlling described voltage detecting circuit 2 time delay the second Preset Times, then detect the voltage of battery cell.
In addition, when average voltage equals the second predetermined voltage threshold, generate the 3rd time-delay command, and send to described voltage detecting circuit, after controlling described voltage detecting circuit 2 time delays the 3rd Preset Time, then detect the voltage of battery cell
With described charging circuit, be connected, for but described average voltage is less than the first predetermined voltage threshold and charging current between 0.1C～0.2C the time, perhaps, but described average voltage be more than or equal to the first predetermined voltage threshold and be less than the second predetermined voltage threshold and charging current when 0.01C; Perhaps, when stating average voltage and equal the second predetermined voltage threshold, generate the 3rd time-delay command and send to the delay controller 9 of described charging circuit.
In some specific embodiments, the delay time in the first time-delay command and the second time-delay command is 0～1 hour, and the time expand in described the 3rd time-delay command is 0.5～24 hour.
Embodiment tri-:
In above-described embodiment one, can to occur charging rate faster the charge condition of battery cell regulated, but after having regulated, it is normal that the charge condition of this battery cell will be tending towards, if now still take the shunting measure, will again cause the charging rate of this battery cell lower than other battery cells.
For this reason, in the embodiment of the present application, the controller 3 in this control circuit can also comprise: the second comparator and the second trigger, wherein:
The second comparator is connected with described voltage comparator 3, whether be less than predetermined threshold value for the voltage difference that judges the batteries monomer in described battery pack, here predetermined threshold value is consider the otherness between monomer and arrange, and allows the less difference existed between battery cell;
The second trigger is connected with described the second comparator, while for the voltage difference of batteries monomer in described battery pack, being less than predetermined threshold value, generate the diverter switch restoring signal and send to described flow equalizing circuit 5, to realize that the first trigger 44 is triggered to the rear diverter switch changed to be recovered.
The above anti-overcharge control circuit of a kind of battery pack that the application is provided is described in detail, applied specific case herein the application's principle and execution mode are set forth, the explanation of above embodiment is just for helping to understand the application's method and core concept thereof; Simultaneously, for one of ordinary skill in the art, the thought according to the application, all will change in specific embodiments and applications, and in sum, this description should not be construed as the restriction to the application.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.
It should be noted that, in this article, such as " being greater than " or " surpassing " or " higher than " or " being less than " or " lower than " etc. relationship description, all can be understood as " be greater than and be not equal to " or " be less than and be not equal to ", also can be understood as " being more than or equal to " or " being less than or equal to ", and not necessarily require or imply a kind of situation restriction or intrinsic that is necessary for.
In addition, in this article, relational terms such as " first " and " second " etc. only is used for an entity or operation are separated with another entity or operating space, and not necessarily requires or imply between these entities or operation the relation of any this reality or sequentially of existing.And, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, article or the equipment that comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
It should be noted that, the above is only a part of preferred embodiment of present techniques scheme, make those skilled in the art can fully understand or realize the application, rather than whole embodiment, General Principle as defined herein can be in the situation that do not break away from the application's spirit or scope, realization in other embodiments.Therefore; based on above embodiment; for those skilled in the art; do not break away from the application's principle, do not making under the creative work prerequisite, can also make multiple apparent modification and retouching; the every other embodiment obtained by these modifications and retouching; can be applied to the present techniques scheme, these do not affect the application's realization, all should belong to the application's protection range.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. the anti-overcharge control circuit of battery pack, described battery pack comprises at least two battery cells, it is characterized in that, comprising:
The charging circuit that input is connected with power line, output is connected with at least two described battery cells respectively;
Input is connected with described battery cell, for the voltage detecting circuit of the voltage that gathers at least two described battery cells;
Input is connected with the output of described voltage detecting circuit, for calculating the average voltage of at least two described battery cells, and described average voltage and predetermined voltage threshold are compared and obtain the first comparative result, and the voltage of at least two described battery cells is compared in twos, and obtain the voltage comparator of the second comparative result;
Input is connected with described voltage comparator, output is connected with charging circuit, be used for controlling the charging voltage of described charging circuit and the size of charging current according to described the first comparative result, and generate the controller of current-sharing signal according to described the second comparative result;
Be connected with a plurality of described charging circuits, and be connected with described controller, for the flow equalizing circuit of the charging current according to a plurality of described charging circuits of described current-sharing signal controlling;
With described battery cell, be connected, for detection of the capacity check device of described battery cell battery capacity;
With described capacity check device, be connected, the capacity comparator compared for battery capacity and preset battery capacity being detected;
Be connected with described capacity comparator, and be connected with described charging circuit, for when battery capacity being detected and equal preset battery capacity, generating and stop charging signals, and send to described charging circuit stop the charging signals generative circuit.
2. control circuit according to claim 1, is characterized in that, described voltage comparator comprises:
For described average voltage and the first predetermined voltage threshold, the second predetermined voltage threshold are compared to the first voltage comparator that obtains the first comparative result;
For the voltage of at least two described battery cells is compared to the second voltage comparator that obtains the second comparative result in twos.
3. control circuit according to claim 2, is characterized in that, described controller comprises:
Input is connected with the output of the first voltage comparator, second voltage comparator, equal the first predetermined voltage threshold for control described charging voltage when described average voltage is less than described the first predetermined voltage threshold, perhaps, control described charging voltage when described average voltage is being more than or equal to the first predetermined voltage threshold and be less than between the second predetermined voltage threshold and equal the second predetermined voltage threshold; Perhaps, when equaling described the second predetermined voltage threshold, described average voltage controls the voltage control circuit that described charging voltage equals the first voltage threshold;
Input is connected with the output of the first voltage comparator, second voltage comparator, for controlling the charging current of described charging circuit when described average voltage is less than described the first predetermined voltage threshold between 0.1C～0.2C, the current control circuit that the charging current of perhaps when described average voltage is more than or equal to described the first predetermined voltage threshold, controlling described charging circuit is 0.01C, wherein 1C equals 0.6A;
With described voltage comparator, be connected, for the voltage that judges some battery cells whether higher than the first comparator of other battery cells in described battery pack;
Be connected with described the first comparator, for the voltage when some battery cells, whether higher than in described battery pack during other battery cells, generate the first trigger of current-sharing signal.
4. control circuit according to claim 3, is characterized in that, described the first predetermined voltage threshold is 3.42V, and described the second predetermined voltage threshold is 3.6V.
5. control circuit according to claim 4, it is characterized in that, further comprise: with described voltage detecting circuit, be connected, for but described average voltage is less than the first predetermined voltage threshold and charging current between 0.1C～0.2C the time, generate the first time-delay command and send to described voltage detecting circuit, perhaps, when described average voltage is more than or equal to the first predetermined voltage threshold and is less than the second predetermined voltage threshold and charging current during at 0.01C, generate the second time-delay command and send to described voltage detecting circuit; Perhaps, when stating average voltage and equal the second predetermined voltage threshold, generate the 3rd time-delay command and send to the delay controller of described voltage detecting circuit.
6. control circuit according to claim 5, is characterized in that, the delay time in described the first time-delay command and the second time-delay command is 0～1 hour, and the time expand in described the 3rd time-delay command is 0.5～24 hour.
7. control circuit according to claim 3, is characterized in that, described flow equalizing circuit comprises a plurality of resistance and a plurality of diverter switch, wherein:
Each described charging circuit all is in series with at least one resistance, and each resistance all forms a diverter branch with a diverter switch;
The control end of each diverter switch is connected with described controller, in described current-sharing signal, includes switching signal, and described diverter switch is controlled by switching signal in described current-sharing signal.
8. control circuit according to claim 3, is characterized in that, described controller also comprises:
Be connected with described voltage comparator, whether be less than the second comparator of predetermined threshold value for the voltage difference that judges the batteries monomer in described battery pack;
Be connected with described the second comparator, while for the voltage difference of the batteries monomer in described battery pack, being less than predetermined threshold value, generating the diverter switch restoring signal and send to the second trigger of described flow equalizing circuit.
9. control circuit according to claim 1, is characterized in that, the described charging signals generative circuit that stops is the level maker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202408482U CN203339727U (en) | 2013-05-07 | 2013-05-07 | Battery pack overcharging-prevention control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013202408482U CN203339727U (en) | 2013-05-07 | 2013-05-07 | Battery pack overcharging-prevention control circuit |
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| CN203339727U true CN203339727U (en) | 2013-12-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779946A (en) * | 2014-03-03 | 2014-05-07 | 深圳市径贝科技有限公司 | Serial battery panel charging device and method |
| CN107306040A (en) * | 2016-04-25 | 2017-10-31 | 东北大学 | Battery charge balance control device and method |
-
2013
- 2013-05-07 CN CN2013202408482U patent/CN203339727U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779946A (en) * | 2014-03-03 | 2014-05-07 | 深圳市径贝科技有限公司 | Serial battery panel charging device and method |
| CN107306040A (en) * | 2016-04-25 | 2017-10-31 | 东北大学 | Battery charge balance control device and method |
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Granted publication date: 20131211 |