CN204794046U - Polymer battery protection shield circuit - Google Patents

Polymer battery protection shield circuit Download PDF

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Publication number
CN204794046U
CN204794046U CN201520573141.2U CN201520573141U CN204794046U CN 204794046 U CN204794046 U CN 204794046U CN 201520573141 U CN201520573141 U CN 201520573141U CN 204794046 U CN204794046 U CN 204794046U
Authority
CN
China
Prior art keywords
circuit
protection circuit
battery
baffle
over
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 - Fee Related
Application number
CN201520573141.2U
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Chinese (zh)
Inventor
张习林
林道岳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Sanhe Chaoyang Science and Technology Co., Ltd.
Original Assignee
Sunhe Energy Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sunhe Energy Co Ltd filed Critical Sunhe Energy Co Ltd
Priority to CN201520573141.2U priority Critical patent/CN204794046U/en
Application granted granted Critical
Publication of CN204794046U publication Critical patent/CN204794046U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a polymer battery protection shield circuit, include battery, voltage detection circuit, cross the charge protection circuit, cross the discharge protection circuit, overflow short -circuit protection circuit and protection shield IC, voltage detection circuit, crossing the charge protection circuit, cross the discharge protection circuit and overflowing short -circuit protection circuit and link to each other with protection shield IC respectively, voltage detection circuit's input links to each other with the battery is anodal, and voltage detection circuit's output links to each other with the battery negative pole, overflows short -circuit protection circuit and cross the charge protection circuit to link to each other, cross the discharge protection circuit respectively with cross charge protection circuit and battery negative pole and link to each other. Through to protecting under battery charging process, the discharge process, the situation of overflowing and under the short circuit situation to realize the all -round protection to the polymer battery, guaranteed to fill mains operated's among the the discharge process stability.

Description

Polymer battery baffle circuit
Technical field
The utility model relates to the technical field of battery protecting circuit, particularly relates to a kind of polymer battery baffle circuit.
Background technology
The Power supply of use dynamic lithium battery group is the mode of the front four batteries power takings adopting battery pack in the market.Although this way to take power has, circuit is simple, low cost and other advantages, but this way to take power has following shortcoming: owing to being subject to the impact of front four batteries voltages, mains ripple comparatively large (such as from the 8V battery over-discharge state to the 16V under over-charging of battery electricity condition) can be caused, and when battery overcharge, overdischarge, front four batteries power consumptions are wanted to go to drive discharge and recharge metal-oxide-semiconductor, such process accumulates for a long time can aggravate battery inconsistency, has a strong impact on the capacity of battery.
In addition, the over-current detection of dynamic lithium battery group generally adopts triode to the internal resistance between the negative pole P-of the total negative pole B-to power brick that detect battery or by adopting first segment battery detecting chip detect the resistance between constantan and then test overcurrent value, these two kinds of modes, although implementation is simple, namely simple transistor drive circuit is used just can to realize, but there is following shortcoming: if the detection mode of overcurrent triode total negative pole B-of detecting battery to power brick negative pole P-between the mode of internal resistance, because metal-oxide-semiconductor is in different temperatures, when different electric current, internal resistance has larger fluctuation, the deviation of overcurrent precision can be caused very large, if and the battery detecting chip of employing first segment detects the resistance between constantan and then tests overcurrent value, owing to directly being received the total negative of battery pack by discharge lines, as the negative pole of the B0 of first segment, like this when there being electric current to pass through, line will produce certain pressure drop, when discharge lines is very long or line hinders large, the super-charge super-discharge value affecting first segment that can be serious, and cause the situation of error detection.
So carry out Real-Time Monitoring to magnitude of voltage in battery core, control for overcurrent or short circuit phenomenon, that just can make the use of battery safer simultaneously.
Utility model content
For the weak point existed in above-mentioned technology, the utility model provides a kind of polymer battery baffle circuit protected comprehensively, be easy to realization.
In order to achieve the above object, a kind of polymer battery baffle of the utility model circuit, comprises battery, voltage detecting circuit, additives for overcharge protection circuit, over-discharge protection circuit, short circuit over-current protection circuit and baffle IC; The input of described baffle IC is electrically connected with battery by voltage detecting circuit, and the output of described baffle IC is electrically connected with battery respectively by additives for overcharge protection circuit, over-discharge protection circuit and short circuit over-current protection circuit.
Wherein, described voltage detecting circuit comprises the first resistance and electric capacity; the input of described first resistance is connected with anode; the output of described first resistance is connected with the first voltage detecting pin position on the input of electric capacity and baffle IC respectively, and the output of described electric capacity is connected with the negative pole of the second voltage detecting pin position on earth connection, baffle IC and battery respectively.
Wherein, described short circuit over-current protection circuit is made up of the second resistance, and one end of described second resistance is connected with the overcurrent short-circuit detecting pin position on baffle IC, and the other end of described second resistance is connected with additives for overcharge protection circuit.
Wherein, described additives for overcharge protection circuit is made up of the first metal-oxide-semiconductor, and three pin positions of described first metal-oxide-semiconductor are detected pin position with the overcharge of short circuit over-current protection circuit, over-discharge protection circuit and baffle IC respectively and are connected.
Wherein, described over-discharge protection circuit is made up of the second metal-oxide-semiconductor, and three pin positions of described second metal-oxide-semiconductor are detected pin position with the overdischarge of the negative pole of battery, additives for overcharge protection circuit and baffle IC respectively and are connected.
The beneficial effects of the utility model are:
Compared with prior art; polymer battery baffle circuit of the present utility model is carrying out under the prerequisite controlled in real time to battery core magnitude of voltage; by protecting under battery charging process, discharge process, overcurrent condition and under short-circuit state; thus the omnibearing protection achieved polymer battery, ensure that the stability of Power supply in charge and discharge process.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model polymer battery baffle circuit.
Main element symbol description is as follows:
10, voltage detecting circuit 11, additives for overcharge protection circuit
12, over-discharge protection circuit 13, short circuit over-current protection circuit
14, baffle IC15, battery
R1, the first resistance R2, the second resistance
C1, electric capacity FET1, the first metal-oxide-semiconductor
FET2, the second metal-oxide-semiconductor VDD, the first voltage detecting pin position
VSS, the second voltage detecting pin position VM, overcurrent short-circuit detecting pin position
CO, overcharge detect pin position DO, overdischarge detection pin position.
Embodiment
In order to more clearly state the utility model, below in conjunction with accompanying drawing, the utility model is further described.
Consult Fig. 1, a kind of polymer battery baffle of the utility model circuit, comprises battery 15, voltage detecting circuit 10, additives for overcharge protection circuit 11, over-discharge protection circuit 12, short circuit over-current protection circuit 13 and baffle IC14; The input of baffle IC14 is electrically connected with battery 15 by voltage detecting circuit 10, and the output of baffle IC14 is electrically connected with battery 15 respectively by additives for overcharge protection circuit 11, over-discharge protection circuit 12 and short circuit over-current protection circuit 13.。
Compared to prior art; polymer battery baffle circuit of the present utility model is carrying out under the prerequisite controlled in real time to battery core magnitude of voltage; by under battery 15 charging process, discharge process, overcurrent condition and protect under short-circuit state; thus the omnibearing protection achieved polymer battery 15, ensure that the stability of Power supply in charge and discharge process.
In the present embodiment; voltage detecting circuit 10 comprises the first resistance R1 and electric capacity C1; the input of the first resistance R1 is connected with battery 15 positive pole; the output of the first resistance R1 is connected with the first voltage detecting pin position VDD on the input of electric capacity C1 and baffle IC14 respectively, and the output of electric capacity C1 is connected with the negative pole of the second voltage detecting pin position VSS on earth connection, baffle IC14 and battery 15 respectively.Short circuit over-current protection circuit 13 is made up of the second resistance R2, and one end of the second resistance R2 is connected with the overcurrent short-circuit detecting pin position VM on baffle IC14, and the other end of the second resistance R2 is connected with additives for overcharge protection circuit 11.
In the present embodiment, additives for overcharge protection circuit 11 is made up of the first metal-oxide-semiconductor FET1, and three pin positions of the first metal-oxide-semiconductor FET1 are detected pin position CO with the overcharge of short circuit over-current protection circuit 13, over-discharge protection circuit 12 and baffle IC14 respectively and are connected.Over-discharge protection circuit 12 is made up of the second metal-oxide-semiconductor FET2, and three pin positions of the second metal-oxide-semiconductor FET2 are detected pin position DO with the overdischarge of the negative pole of battery 15, additives for overcharge protection circuit 11 and baffle IC14 respectively and are connected.
The operation principle of the utility model polymer battery baffle circuit is:
1, additives for overcharge protection:
Charging current is charged to battery core through the first metal-oxide-semiconductor FET1 and the second metal-oxide-semiconductor FET2.At this moment, the first voltage detecting pin position VDD and the second voltage detecting pin position VSS of baffle IC14 are power end, are also battery core voltage detecting ends.Along with the carrying out of charging, battery core voltage raises gradually, and when being elevated to baffle IC14 threshold voltage, overcharge detection pin position CO exports high level immediately and turned off by corresponding first metal-oxide-semiconductor FET1, and charge circuit is also disconnected.After over-charge protective, battery core voltage can decline, and when dropping to baffle IC14 threshold voltage, overdischarge detects pin position DO recovery low level state and opens the second metal-oxide-semiconductor FET2 switch.
2, over:
When battery 15 discharges; first voltage detecting pin position VDD and the second voltage detecting pin position VSS of baffle IC14 also can to battery core voltage detecting; when battery core voltage drop is to baffle IC14 threshold voltage; overdischarge detection pin position DO exports high level immediately and is turned off by the second metal-oxide-semiconductor FET2 of correspondence, and discharge loop is disconnected.After Cross prevention, battery core voltage can rise, and when rising to baffle IC14 threshold voltage, overdischarge detects pin position DO recovery low level state and opens the second metal-oxide-semiconductor FET2 switch.
3, overcurrent, short-circuit protection:
When in discharge process, main circuit current is large; because the first metal-oxide-semiconductor FET1 and the second metal-oxide-semiconductor FET2 saturation conduction also exist internal resistance; so electric current is when flowing through; first metal-oxide-semiconductor FET1 and the second metal-oxide-semiconductor FET2 two ends can produce pressure drop; the overcurrent short-circuit detecting pin position VM of baffle IC14 and the second voltage detecting pin position VSS can detect the voltage at the first metal-oxide-semiconductor FET1 and the second metal-oxide-semiconductor FET2 two ends at any time; when voltage rise is prescribed a time limit to baffle IC14 shutter; overdischarge detects pin position DO horse back output high level and is turned off by corresponding second metal-oxide-semiconductor FET2, and discharge loop is disconnected.
Be only several specific embodiment of the present utility model above, but the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection range of the present utility model.

Claims (5)

1. a polymer battery baffle circuit, is characterized in that, comprises battery, voltage detecting circuit, additives for overcharge protection circuit, over-discharge protection circuit, short circuit over-current protection circuit and baffle IC; The input of described baffle IC is electrically connected with battery by voltage detecting circuit, and the output of described baffle IC is electrically connected with battery respectively by additives for overcharge protection circuit, over-discharge protection circuit and short circuit over-current protection circuit.
2. polymer battery baffle circuit according to claim 1; it is characterized in that; described voltage detecting circuit comprises the first resistance and electric capacity; the input of described first resistance is connected with anode; the output of described first resistance is connected with the first voltage detecting pin position on the input of electric capacity and baffle IC respectively, and the output of described electric capacity is connected with the negative pole of the second voltage detecting pin position on earth connection, baffle IC and battery respectively.
3. polymer battery baffle circuit according to claim 1; it is characterized in that; described short circuit over-current protection circuit is made up of the second resistance; one end of described second resistance is connected with the overcurrent short-circuit detecting pin position on baffle IC, and the other end of described second resistance is connected with additives for overcharge protection circuit.
4. polymer battery baffle circuit according to claim 1; it is characterized in that; described additives for overcharge protection circuit is made up of the first metal-oxide-semiconductor, and three pin positions of described first metal-oxide-semiconductor are detected pin position with the overcharge of short circuit over-current protection circuit, over-discharge protection circuit and baffle IC respectively and are connected.
5. polymer battery baffle circuit according to claim 1; it is characterized in that; described over-discharge protection circuit is made up of the second metal-oxide-semiconductor, and three pin positions of described second metal-oxide-semiconductor are detected pin position with the overdischarge of the negative pole of battery, additives for overcharge protection circuit and baffle IC respectively and are connected.
CN201520573141.2U 2015-08-01 2015-08-01 Polymer battery protection shield circuit Expired - Fee Related CN204794046U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520573141.2U CN204794046U (en) 2015-08-01 2015-08-01 Polymer battery protection shield circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520573141.2U CN204794046U (en) 2015-08-01 2015-08-01 Polymer battery protection shield circuit

Publications (1)

Publication Number Publication Date
CN204794046U true CN204794046U (en) 2015-11-18

Family

ID=54534029

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520573141.2U Expired - Fee Related CN204794046U (en) 2015-08-01 2015-08-01 Polymer battery protection shield circuit

Country Status (1)

Country Link
CN (1) CN204794046U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110416976A (en) * 2017-09-23 2019-11-05 华为技术有限公司 A kind of apparatus for protecting power supply and the terminal using described device
CN110837037A (en) * 2019-11-13 2020-02-25 福建星云电子股份有限公司 Secondary overvoltage detection circuit for lithium battery pack protection plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110416976A (en) * 2017-09-23 2019-11-05 华为技术有限公司 A kind of apparatus for protecting power supply and the terminal using described device
CN110837037A (en) * 2019-11-13 2020-02-25 福建星云电子股份有限公司 Secondary overvoltage detection circuit for lithium battery pack protection plate
CN110837037B (en) * 2019-11-13 2021-12-14 福建星云电子股份有限公司 Secondary overvoltage detection circuit for lithium battery pack protection plate

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C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 518000 4th Floor of No. 44 Hengtang Road, Shijing Community, Pingshan Office, Pingshan New District, Shenzhen City, Guangdong Province

Patentee after: Shenzhen Sanhe Chaoyang Science and Technology Co., Ltd.

Address before: 518000 4th Floor of No. 44 Hengtang Road, Shijing Community, Pingshan Office, Pingshan New District, Shenzhen City, Guangdong Province

Patentee before: SUNHE ENERGY COMPANY LIMITED

CP01 Change in the name or title of a patent holder
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151118

Termination date: 20190801

CF01 Termination of patent right due to non-payment of annual fee