CN203574356U - Lithium battery protection board with charging-protection and accelerated cutoff function - Google Patents
Lithium battery protection board with charging-protection and accelerated cutoff function Download PDFInfo
- Publication number
- CN203574356U CN203574356U CN201320680454.9U CN201320680454U CN203574356U CN 203574356 U CN203574356 U CN 203574356U CN 201320680454 U CN201320680454 U CN 201320680454U CN 203574356 U CN203574356 U CN 203574356U
- Authority
- CN
- China
- Prior art keywords
- effect transistor
- field
- lithium battery
- charging
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 22
- 230000005669 field effect Effects 0.000 claims abstract description 55
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model provides a lithium battery protection board with a charging-protection and accelerated cutoff function, relates to the field of lithium battery circuit, and especially relates to a lithium battery charging protection board. The lithium battery protection board with a charging-protection and accelerated cutoff function comprises a controller (IC), a charging device, a discharging control module and a charging control module; the controller is connected to the positive pole and the negative pole of a lithium battery, the discharging control pin of the controller is connected to the discharging control module, the charging control pin of the controller is connected to the charging control module, the lithium battery protection board also comprises an over-charging protection and accelerated cutoff module, and the over-charging protection and accelerated cutoff module is connected to the charging control module. The lithium battery protection board can reduce the pressure reducing period during the cutoff state of the field effect transistor of the charging control module when a lithium battery is overcharged so as to make the field effect transistor be in a stable cutoff state.
Description
Technical field
The utility model relates to lithium battery circuit field, specially refers to a kind of lithium cell charging baffle.
Background technology
Battery protecting plate is the surface-mounted integrated circuit that rechargeable battery (being generally lithium battery) is shielded; making material due to lithium battery; make it can not be overcharged, cross put, overcurrent, short circuit and superhigh temperature charging and discharging; battery protecting plate can be controlled the break-make of current circuit immediately, prevents that battery from severe destruction occurring.
The charging control pin formula of the lithium battery protection board of existing scheme is opened drain electrode design, unsettled during shutoff, there is no ground connection, if otherwise charger voltage can make the conducting again of the second field-effect transistor more than exceeding 3.0V than cell voltage after over-charge protective, charging cannot stop, so CO end must be out to leak design, when can cause turn-offing like this, the second field-effect transistor be from drain-to-source voltage drop too slow (referring to Fig. 2), the trailing edge time is about 500-800ms, the trailing edge time is long, now the second field-effect transistor easily damages, if reduce and to make it accelerate electric discharge being connected to the grid of the second field-effect transistor and the resistance of the resistance between drain electrode, can cause battery pack excessive from power consumption.
Utility model content
The technical problem to be solved in the present invention is to provide a kind of lithium battery protection board that accelerates shutoff with charge protection; it is simple in structure; can reduce when overcharging; when the field-effect transistor in charge control module turn-offs, the fall time of voltage, makes field-effect transistor be operated in reliable off state.
Be achieved through the following technical solutions above-mentioned purpose:
A kind of lithium battery protection board that accelerates shutoff with charge protection; comprise controller (IC), charger, control of discharge module and charge control module; described controller is connected respectively with negative pole with the positive pole of battery; and the control of discharge pin of described controller is connected with described control of discharge module; the charging control pin of described controller is connected with described charge control module; also comprise that over-charge protective accelerates to turn-off module, described over-charge protective accelerates to turn-off module and is connected with described charge control module.
Further, described charge control module comprises the first field-effect transistor; Described control of discharge module comprises the second field-effect transistor.
Further, the first described field-effect transistor and the second field-effect transistor are N slot field-effect transistor.
Further, described over-charge protective accelerates to turn-off module and comprises the 3rd field-effect transistor and a triode, the source electrode of the 3rd described field-effect transistor is connected with the source electrode of the second field-effect transistor, the drain electrode of the 3rd described field-effect transistor is connected with the grid of the second field-effect transistor, and described the 3rd grid of field-effect transistor and the negative pole of charger are connected; The base stage of described triode is connected with charging control pin, and the collector electrode of described triode is connected with the negative pole of described charger after series resistance dividing potential drop and voltage stabilizing.
The beneficial effects of the utility model are: charging current flow through respectively the first field-effect transistor and the second field-effect transistor; carrying out along with charging; cell voltage raises gradually; when being elevated to controller (IC) threshold voltage, (be generally 4.30V; be commonly referred to over-charge protective voltage) time, charging control pin (CO) is opened Lou output
(draining unsettled), the second field-effect transistor of charge control module is closed, the base stage of opening the triode under output state is Lou also low level, triode conducting, by the grid of voltage to the 3rd field-effect transistor is provided after the resistance in figure or capacitance partial pressure, make the 3rd field-effect transistor conducting; Now, the second field-effect transistor accelerates electric discharge from grid to source electrode, and such the second field-effect transistor will be operated under reliable off state, can be because of the time of trailing edge not oversize and damage, through experiment, draw the trailing edge time of Fig. 3 for measuring after improving.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Fig. 2 is the V-t figure under E-Q test point before improving;
Fig. 3 is the V-t figure under E-Q test point after improving.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
The direction term of mentioning in following examples, for example " upper and lower, left and right " are only the directions with reference to accompanying drawing, therefore, the direction term of use is to be not used for limiting the utility model for illustrating.
As shown in Figure 1, in figure, DO represents control of discharge pin; CO represents the control pin that charges; P+ represents that load is anodal; P-represents load negative pole; C+ represents that charging is anodal; C-represents the negative pole that charges; B+ represents that battery pack is always anodal; B-represents the total negative pole of battery pack; E, Q are the test point of waveform, be used for testing the time in off state trailing edge, this is because UGS has control action to ID, by the measurement to UGS, can effectively reflect the voltage drop time from drain-to-source, Fig. 2 and Fig. 3 are the measurements to UGS.A kind of lithium battery protection board that accelerates shutoff with charge protection; comprise controller IC, charger, control of discharge module and charge control module; described controller is connected respectively with negative pole B-with the anodal B+ of battery; and the control of discharge pin DO of described controller is connected with described control of discharge module; the charging control pin CO of described controller is connected with described charge control module; also comprise that over-charge protective accelerates to turn-off modules A, described over-charge protective accelerates to turn-off modules A and is connected with described charge control module.
Further, described charge control module comprises the first field-effect transistor N-MOSFET-1; Described control of discharge module comprises the second field-effect transistor N-MOSFET-2.
Further, the first described field-effect transistor and the second field-effect transistor are N slot field-effect transistor.
Further, described over-charge protective accelerates to turn-off module and comprises the 3rd field-effect transistor QC2 diode DC3 and triode QC1, the source electrode of the 3rd described field-effect transistor is connected with the source electrode of the second field-effect transistor, the drain electrode of the 3rd described field-effect transistor is connected with the grid G of the second field-effect transistor, and the grid of the 3rd described field-effect transistor is connected with the negative pole C-of charger; The base stage of described triode is connected with charging control pin, and the collector electrode of described triode is connected with the negative pole C-of described charger after series resistance RC5 dividing potential drop and voltage stabilizing.
Charging current flow through respectively the first field-effect transistor and the second field-effect transistor, carrying out along with charging, cell voltage raises gradually, when being elevated to controller IC threshold voltage, (be generally 4.30V, be commonly referred to over-charge protective voltage) time, charging control pin CO opens Lou output closes the second field-effect transistor N-MOSFET-2 of charge control module, the base stage that CO opens the triode QC1 under output state is Lou low level, the conducting of triode, by the grid of voltage to the 3rd field-effect transistor QC2 is provided after the electric resistance partial pressure in figure and voltage stabilizing, make the 3rd field-effect transistor conducting, now, the second field-effect transistor accelerates electric discharge from grid G to source S, such the second field-effect transistor will be operated under reliable off state, oversize and damage in the time of can be because of trailing edge, through experiment, draw, the trailing edge time of Fig. 3 for measuring after improving, the trailing edge time is about 4-6ms, even arrives uS rank.
The above not imposes any restrictions this novel technical scope, and all any modification, equivalent variations and modifications of above embodiment being done according to the utility model technical spirit all still belong in the scope of this novel technical scheme.
Claims (4)
1. the lithium battery protection board accelerate turn-offing with charge protection; comprise controller (IC), charger, control of discharge module and charge control module; described controller is connected respectively with negative pole with the positive pole of battery; and the control of discharge pin of described controller is connected with described control of discharge module; the charging control pin of described controller is connected with described charge control module; it is characterized in that; also comprise that over-charge protective accelerates to turn-off module, described over-charge protective accelerates to turn-off module and is connected with described charge control module.
2. a kind of lithium battery protection board that accelerates shutoff with charge protection according to claim 1, is characterized in that: described charge control module comprises the first field-effect transistor; Described control of discharge module comprises the second field-effect transistor.
3. a kind of lithium battery protection board that accelerates shutoff with charge protection according to claim 2, is characterized in that: the first described field-effect transistor and the second field-effect transistor are N slot field-effect transistor.
4. a kind of lithium battery protection board accelerate turn-offing with charge protection according to claim 3, it is characterized in that: described over-charge protective accelerates to turn-off module and comprises the 3rd field-effect transistor, diode and triode, the source electrode of the 3rd described field-effect transistor is connected with the source electrode of the second field-effect transistor, the drain electrode of the 3rd described field-effect transistor is connected with the grid of the second field-effect transistor, and described the 3rd grid of field-effect transistor and the negative pole of charger are connected; The base stage of described triode is connected with charging control pin, and the collector electrode of described triode is connected with the negative pole of described charger after series resistance dividing potential drop and voltage stabilizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320680454.9U CN203574356U (en) | 2013-10-30 | 2013-10-30 | Lithium battery protection board with charging-protection and accelerated cutoff function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320680454.9U CN203574356U (en) | 2013-10-30 | 2013-10-30 | Lithium battery protection board with charging-protection and accelerated cutoff function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203574356U true CN203574356U (en) | 2014-04-30 |
Family
ID=50542069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320680454.9U Expired - Lifetime CN203574356U (en) | 2013-10-30 | 2013-10-30 | Lithium battery protection board with charging-protection and accelerated cutoff function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203574356U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110832732A (en) * | 2017-07-19 | 2020-02-21 | 三洋电机株式会社 | Battery protection circuit and power supply device provided with same |
-
2013
- 2013-10-30 CN CN201320680454.9U patent/CN203574356U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110832732A (en) * | 2017-07-19 | 2020-02-21 | 三洋电机株式会社 | Battery protection circuit and power supply device provided with same |
| CN110832732B (en) * | 2017-07-19 | 2024-01-16 | 松下新能源株式会社 | Protection circuit for battery and power supply device provided with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204666703U (en) | The current detection circuit of quick charging battery fender | |
| CN203056630U (en) | Battery-charger charging-protection and non-input battery zero-loss circuit | |
| CN103515937A (en) | Battery protection circuit with secondary overvoltage and undervoltage protection function | |
| CN201937301U (en) | Integrated circuit for charging and discharging management on battery pack serially connected by multiple lithium batteries | |
| CN103683266B (en) | Rechargeable battery protection circuit | |
| CN108448189B (en) | Storage battery pack realizing device for low-temperature charging | |
| CN207234455U (en) | Super low-power consumption lithium battery charge and discharge protective circuit | |
| CN204243735U (en) | A kind of lithium battery management system for electric car | |
| CN203574356U (en) | Lithium battery protection board with charging-protection and accelerated cutoff function | |
| CN204258355U (en) | A kind of under-voltage cut-off circuit | |
| CN201937251U (en) | Threshold-adjustable integrated circuit for multi-lithium battery protection circuit | |
| CN204794046U (en) | Polymer battery protection shield circuit | |
| CN218675240U (en) | Lithium battery comprehensive test equipment with multifunctional protection | |
| CN204258343U (en) | A kind of lithium battery group monitor and repairing device with multi-string battery | |
| CN109378800A (en) | A kind of band temperature controlled Li-ion battery protection board based on learning robot | |
| CN205753518U (en) | A kind of Undervoltage protection circuit for battery | |
| CN201600435U (en) | Lithium ion battery protecting IC circuit board testing device | |
| CN104065115A (en) | Battery charger | |
| CN201489094U (en) | Battery electric quantity warning circuit | |
| CN203574355U (en) | Lithium battery protection board with charging locking function | |
| CN205070409U (en) | Switch transistor pressure drop holding circuit and applied this pressure drop holding circuit's lithium battery protection circuit | |
| CN205724853U (en) | A kind of battery protecting circuit being applied to photovoltaic product | |
| CN203415959U (en) | Charge and discharge protection device for lithium ion battery | |
| CN208986597U (en) | Lithium battery protection board short-circuit protection accelerates breaking circuit | |
| CN202797905U (en) | Battery protection plate having line break protection function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |
|
| CX01 | Expiry of patent term |