CN103972870A - Overcharge protection circuit of lead-acid cell - Google Patents
Overcharge protection circuit of lead-acid cell Download PDFInfo
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- CN103972870A CN103972870A CN201410225178.6A CN201410225178A CN103972870A CN 103972870 A CN103972870 A CN 103972870A CN 201410225178 A CN201410225178 A CN 201410225178A CN 103972870 A CN103972870 A CN 103972870A
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Abstract
The invention provides an overcharge protection circuit of a lead-acid cell. The overcharge protection circuit comprises a charge detection module, a control module, a cell voltage detection module, a switch module, a timing module and a storage module, wherein the charge detection module is used for detecting charge current and voltage input from an external charger; the cell voltage detection module is used for detecting the voltage value of the lead-acid cell; the control module is used for starting the timing module to time up according to a signal transmitted from the charge detection module, and used for controlling the on/off operation of the switch module according to a signal of the timing module; the timing time set by the timing module is acquired from the storage module through the control module according to the cell voltage value. By adopting the technical scheme, the needed charging time can be precisely confirmed according to lead-acid cell parameters and the charge parameters, and by controlling the on/off operation of a charge loop at certain time, the purpose of preventing the lead-acid cell from overcharge is achieved.
Description
Technical field
The present invention relates to additives for overcharge protection circuit, be specifically related to a kind of additives for overcharge protection circuit with timing function.
Background technology
At present, adopt lead-acid battery to increase gradually as the product of electrical source of power, but in this series products, battery is all often to hold most flimsy parts, has a strong impact on user and use.Lead-acid battery is short useful life, one of them major reason be exactly lead-acid battery in charging process for a long time in overcharge condition, and main bad reason is that charger parameter is not mated, causes lead-acid battery sulfuration and gassing, and then cause lead-acid battery capacity sharply to decline.
In prior art, a lot of chargers all adopt syllogic charging modes, by detecting cell voltage, control charging process, the charged states such as general successively experience " constant current charge ", " constant voltage charge ", " trickle charge ".Adopt in this way, to the functional lead-acid battery that there is no damage, its charging process approaches optimum charging curve, can finely play charge protection effect.But lead-acid battery in use can be constantly aging, its internal resistance is increased, even can cause a part of lead-acid battery damage.Once there is these situations, charging process possibly cannot be covered ideal charging flow process smoothly.Such as, because lead-acid battery partly damages, even if it is full of (because lead-acid battery damage cannot reach perfect condition), by detection lead-acid battery voltage, electric current, cannot reach the condition of " constant voltage charge " or trickle charge state, will be for a long time in " constant current charge " or " constant voltage charge " state, make lead-acid battery in large electric current, overcharge state for a long time, cause on the contrary vicious circle, accelerate lead-acid battery and scrap.
Therefore, for the above-mentioned defect existing in currently available technology, be in fact necessary to study, so that a kind of scheme to be provided, solve the defect existing in prior art, further extend lead-acid battery useful life.
Summary of the invention
In order to overcome the defect of above-mentioned prior art; the invention provides a kind of regularly lead-acid battery additives for overcharge protection circuit of charge function that has; can determine and be full of the required charging interval according to battery open circuit voltage value; charged state being detected starts regularly; can accurately control charging duration, effectively prevent from overcharging.
The problem existing for solving prior art, technical scheme of the present invention is:
A lead-acid battery additives for overcharge protection circuit, comprises charging detection module, control module, battery voltage detection module, switch module, time block and memory module, wherein,
Described charging detection module is for detection of charging current and the voltage of external charger input;
Described battery voltage detection module is for detection of lead-acid battery magnitude of voltage;
Described switch module is connected with battery with charger, and its conducting or disconnection are controlled by described control module;
Described time block is for the timing battery charging interval;
Described memory module is for storage battery parameter information;
Described control module is connected with memory module with described charging detection module, battery voltage detection module, switch module, time block, the signal enabling time block sending according to described charging detection module starts regularly, and according to conducting or the disconnection of the Signal-controlled switch module of time block;
The timing of described time block setting is obtained according to battery voltage value by described control module from memory module.
Preferably, described control module is single-chip microcomputer.
Preferably, described switch module is relay or semiconductor switch pipe.
Compared with prior art, beneficial effect of the present invention is as follows: the present invention accurately determines the required charging interval by lead-acid battery parameter and charge parameter thereof, and by the break-make of timing controlled charge circuit, thereby reach the object that prevents that lead-acid battery from overcharging.
Accompanying drawing explanation
Fig. 1 is the theory diagram of a kind of lead-acid battery additives for overcharge protection of embodiment of the present invention circuit;
Fig. 2 is a kind of lead-acid battery additives for overcharge protection of embodiment of the present invention circuit structured flowchart in actual applications;
Fig. 3 is the control flow block diagram of a kind of lead-acid battery additives for overcharge protection of embodiment of the present invention circuit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
On the contrary, the present invention contain any by claim, defined in marrow of the present invention and scope, make substitute, modification, equivalent method and scheme.Further, for the public is had a better understanding to the present invention, in below details of the present invention being described, detailed some specific detail sections of having described.Do not have for a person skilled in the art the description of these detail sections can understand the present invention completely yet.
Plumbic acid lead-acid battery is the first-selection of cheap electrical source of power, uses reliably, is widely used in the fields such as electric motor car.At present, plumbic acid lead-acid battery does not generally all have special charge protector, and the charger of some producer has similar charging protection function.But existing charger market confusion, product quality is uneven, and lead-acid battery is substantially by several large factory's monopolizations (super prestige, Tian Nengdeng producer), uses for a long time the charger of low-quality to charge, and can cause damage to lead-acid battery; In charger, need to use power device, its useful life is short more a lot of than lead-acid battery and charge protector, and charge protector is integrated in charger, and after charger is scrapped, charge protector is also scrapped thereupon, has caused the waste of resource.Therefore, the present invention proposes a kind of lead-acid battery additives for overcharge protection circuit, can use separately or integrate with lead-acid battery.
Referring to Fig. 1, be depicted as the theory diagram of embodiment of the present invention lead-acid battery additives for overcharge protection circuit, comprise charging detection module 101, control module 102, battery voltage detection module 103, switch module 104, time block 105 and memory module 106, wherein,
Charging detection module 101 is connected with external charger, for detection of charging current and the voltage of input;
Battery voltage detection module 103 is connected with battery two ends, for detection of battery voltage value;
Switch module 104 is connected with battery with charger, and its conducting or disconnection are controlled by control module 102;
Time block 105 is for the timing battery charging interval;
Memory module 106 is for storage battery parameter information;
Control module 102 is connected with memory module 106 with charging detection module 101, battery voltage detection module 103, switch module 104, time block 105, the signal enabling time block 105 sending according to charging detection module 101 starts regularly, and according to conducting or the disconnection of the Signal-controlled switch module 104 of time block 105;
The timing of the setting of time block 105 is obtained according to lead-acid battery magnitude of voltage by control module 102 from memory module 106.
The residual capacity proportion relation of the open-circuit voltage values of lead-acid battery and lead-acid battery, at present in most of application scenarios, all to estimate lead-acid battery current electric quantity by detecting lead-acid battery open-circuit voltage values, the embodiment of the present invention is also to adopt which, by battery voltage detection module 103, detect the open-circuit voltage values of lead-acid battery under non operating state, estimate the dump energy of this lead-acid battery, and then draw the charging interval required under standard charging current.Lead-acid battery parameter information is pre-stored in memory module 106, such as corresponding table of lead-acid battery total capacity, open-circuit voltage values and lead-acid battery residual capacity etc.
For the further accurate charging interval, can also in conjunction with lead-acid battery calculation of parameter, go out the required charging interval according to reality charging input (voltage and current parameter); If actual charging input exceeds the parameter area that battery can bear, cannot charge to this lead-acid battery.
Under non-charged state; switch module 104 is in off-state; whether 103 monitoring of charging detection module have charging input; if actual charging input exceeds the parameter area that battery can bear; such as charger output charging voltage and the situation such as lead-acid battery does not mate, cannot opening switch module 104, and then cannot this lead-acid battery be charged; thereby protection lead-acid battery, further extends lead-acid battery useful life.
Detect and charge normal after input, control module 102 is obtained charge timing time opening timing module 105, and actuating switch module 104, enters charged state simultaneously;
In charging process, by detecting the residing charged state of lead-acid battery magnitude of voltage judgement lead-acid battery, this point is similar to prior art, if but timing is through with, no matter lead-acid battery is in which kind of charged state, all cut-off switch module 104, complete charge, prevent from the situation of lead-acid battery damage, for a long time in charged state, effectively preventing that lead-acid battery from overcharging.
A kind of preferred embodiment in, control module 102 is single-chip microcomputer.
A kind of preferred embodiment in, switch module 104 is relay or MOS switching tube.
Referring to Fig. 2; be depicted as embodiment of the present invention lead-acid battery additives for overcharge protection circuit structured flowchart in actual applications; lead-acid battery additives for overcharge protection circuit 1 and lead-acid battery body 2 shown in Fig. 1 is integrated; and be arranged on together in lead-acid battery shell, form the battery of built-in additives for overcharge protection circuit.Shell is also provided for the charging inlet 3 that is connected with charger and output interface 4 for being connected with load, and charging inlet 3 is connected with lead-acid battery additives for overcharge protection circuit 1, and output interface 4 is connected with lead-acid battery body 2.
Pre-stored lead-acid battery parameter in lead-acid battery additives for overcharge protection circuit 1, and accurately control the charging interval according to lead-acid battery residual capacity.Due to built-in protective circuit in lead-acid battery, thereby more effective protection lead-acid battery postpones its useful life.
Referring to Fig. 3, be depicted as the control flow block diagram of embodiment of the present invention lead-acid battery additives for overcharge protection circuit, lead-acid battery additives for overcharge protection circuit 1 is set in charge circuit, comprise following control step:
(1) detect charging input; Detect from the voltage and current of charger input, corresponding to the lead-acid battery of same specifications parameter, the electric current and voltage of charger is generally all followed corresponding standard.
(2) detect lead-acid battery open-circuit voltage values, obtain the charge timing time; The residual capacity proportion relation of the open-circuit voltage values of lead-acid battery and lead-acid battery; and lead-acid battery parameter is pre-stored in lead-acid battery additives for overcharge protection circuit 1; thereby can calculate the electric weight of the required charging of lead-acid battery, according to standard charging parameter, can calculate the charge timing time.
(3) timing parameters of time block is set and starts time block and start regularly;
(4) after starting regularly, actuating switch module, starts charging simultaneously;
(5) after timing finishes, stopcock module, complete charge.
In practice, due to charger, producer is numerous, and the parameter of each charger exists larger difference, in order more accurately to control the charge timing time, in a preferred embodiment of the present invention, also comprise the step of dynamically adjusting the charge timing time according to the voltage and current of charging input.According to the charging voltage of input and electric current combination, in conjunction with lead-acid battery parameter, accurately calculate the charge timing time.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a lead-acid battery additives for overcharge protection circuit; it is characterized in that; comprise charging detection module (101), control module (102), battery voltage detection module (103), switch module (104), time block (105) and memory module (106); wherein
Described charging detection module (101) is for detection of charging current and the voltage of external charger input;
Described battery voltage detection module (103) is for detection of battery voltage value;
Described switch module (104) is connected with battery with charger, and its conducting or disconnection are controlled by described control module (102);
Described time block (105) is for the timing battery charging interval;
Described memory module (106) is for storage battery parameter information;
Described control module (102) is connected with described charging detection module (101), battery voltage detection module (103), switch module (104), time block (105) and memory module (106), the signal enabling time block (105) sending according to described charging detection module (101) starts regularly, and according to conducting or the disconnection of the Signal-controlled switch module (104) of time block (105);
The timing that described time block (105) arranges is obtained according to battery voltage value by described control module (102) from memory module (106).
2. lead-acid battery additives for overcharge protection circuit according to claim 1, is characterized in that, described control module (102) is single-chip microcomputer.
3. lead-acid battery additives for overcharge protection circuit according to claim 1, is characterized in that, described switch module (104) is relay or semiconductor switch pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410225178.6A CN103972870A (en) | 2014-05-26 | 2014-05-26 | Overcharge protection circuit of lead-acid cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410225178.6A CN103972870A (en) | 2014-05-26 | 2014-05-26 | Overcharge protection circuit of lead-acid cell |
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| CN103972870A true CN103972870A (en) | 2014-08-06 |
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| CN201410225178.6A Pending CN103972870A (en) | 2014-05-26 | 2014-05-26 | Overcharge protection circuit of lead-acid cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104283285A (en) * | 2014-10-28 | 2015-01-14 | 江苏惠居乐信息科技有限公司 | Charging system with detection function |
| CN104779588A (en) * | 2015-03-26 | 2015-07-15 | 东莞市台铃车业有限公司 | Device for electric vehicle charging protection |
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| CN102457093A (en) * | 2010-10-20 | 2012-05-16 | 三菱自动车工业株式会社 | Charging control equipment |
| CN102540088A (en) * | 2010-11-22 | 2012-07-04 | 三美电机株式会社 | Battery monitoring device and battery monitoring method |
| CN103138356A (en) * | 2011-11-29 | 2013-06-05 | 海洋王照明科技股份有限公司 | Lighting fitting and charging circuit of secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1777311A (en) * | 2004-11-17 | 2006-05-24 | 乐金电子(中国)研究开发中心有限公司 | Mobile communication terminal of displaying time that cell needs to finish charging and displaying method thereof |
| CN2899127Y (en) * | 2006-03-09 | 2007-05-09 | 王一锋 | Plumbous-acid accumulator with charging and discharging protecting control module |
| CN102457093A (en) * | 2010-10-20 | 2012-05-16 | 三菱自动车工业株式会社 | Charging control equipment |
| CN102540088A (en) * | 2010-11-22 | 2012-07-04 | 三美电机株式会社 | Battery monitoring device and battery monitoring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104283285A (en) * | 2014-10-28 | 2015-01-14 | 江苏惠居乐信息科技有限公司 | Charging system with detection function |
| CN104779588A (en) * | 2015-03-26 | 2015-07-15 | 东莞市台铃车业有限公司 | Device for electric vehicle charging protection |
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Application publication date: 20140806 |