CN201134460Y - Protective circuit board of improved lithium ion batteries - Google Patents
Protective circuit board of improved lithium ion batteries Download PDFInfo
- Publication number
- CN201134460Y CN201134460Y CNU2007200989423U CN200720098942U CN201134460Y CN 201134460 Y CN201134460 Y CN 201134460Y CN U2007200989423 U CNU2007200989423 U CN U2007200989423U CN 200720098942 U CN200720098942 U CN 200720098942U CN 201134460 Y CN201134460 Y CN 201134460Y
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- battery pack
- signal output
- ion battery
- battery
- 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
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses an improved protective circuit board for a lithium ion battery, which comprises an integrating circuit protective module for the lithium ion battery, and a metal-oxide layer-semiconductor-field effect transistor. The signal output end of the integrating circuit protective module is connected with the grid electrode of the transistor, the source electrode of the transistor is respectively connected with the negative electrode of the battery and the negative electrode of the electric equipment, the signal input end of the integrating circuit protective module is connected with the signal output end of a signal acquisition and comparison module, and the signal output end of the integrating circuit protective module is connected to a safety appliance, the signal input end of the signal acquisition and comparison module is respectively connected with the positive and negative terminals of the battery. In the process of using the battery, a single cell is in power-down mode among the battery, which can be judged in time, thereby avoiding other wrong judgments. By improvement on the basis of the existing protective circuit board, the lithium ion battery protective circuit board with simple structure and reliable performance is provided.
Description
Technical field
The utility model relates to a kind of protected mode perfect of lithium ion battery pack protection circuit plate, relates in particular to a kind of improved lithium ion battery pack protection circuit plate.
Background technology
At present, the protected mode of lithium ion battery pack protection circuit plate mainly comprises: the protected modes such as over of cell in the additives for overcharge protection of cell, the battery pack in the overcurrent protection of the additives for overcharge protection of battery pack, the over of battery pack, battery pack, the battery pack.The power down of cell shows as the holding wire loose contact or the disconnection of cell group and the collection of protective circuit partitioned signal in the battery pack, and the protective circuit plate is gathered less than monomer battery voltage.This state does not show as the abnormality of above protective circuit plate protection, thereby causes the irregular working of battery pack.Lithium ion battery group protection integrating circuit (IC) commonly used is not considered the state protection of cell power down in the battery pack in the industry, causes unnecessary false judgment and other danger.
Summary of the invention
The purpose of this utility model is to overcome the prior art weak point, and a kind of a kind of improved lithium ion battery pack protection circuit plate of simple in structure, dependable performance is provided.
The technical scheme that the utility model adopted is for achieving the above object:
A kind of improved lithium ion battery pack protection circuit plate; it comprises lithium ion battery group inte gration circuit protection module; metal-oxide layer-semiconductor-field-effect transistor; the signal output part of described integrating circuit protection module links to each other with the grid of described metal-oxide layer-semiconductor-field-effect transistor; the source electrode of described metal-oxide layer-semiconductor-field-effect transistor links to each other with the negative pole of battery pack and the negative pole of power consumption equipment respectively; the signal input part of described integrating circuit protection module links to each other with the signal output part of signals collecting and comparison module and its signal output part is connected with safeties that are used for switching circuit, and described signals collecting and comparison module signal input part link to each other extremely respectively with the positive and negative of battery pack.
The utility model beneficial effect is: battery pack in use if can in time judge when the power-down state of cell in the battery pack occurring, is avoided other false judgment to the problem battery pack; Perfect on the basis of existing protective circuit plate, a kind of protected mode of lithium ion battery pack protection circuit plate of simple in structure, dependable performance is provided.
Description of drawings
Fig. 1 is existing lithium ion battery group baffle circuit theory diagrams;
Fig. 2 is the schematic diagram of a kind of improved lithium ion battery pack protection circuit plate of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in detail.
A kind of as shown in drawings improved lithium ion battery pack protection circuit plate; it comprises lithium ion battery group inte gration circuit (IC) protection module; metal-oxide layer-semiconductor-field-effect transistor; the signal output part of described integrating circuit protection module links to each other with the switch of oxide-semiconductor control transistors with the grid of described metal-oxide layer-semiconductor-field-effect transistor (MOSFET); the source electrode of described metal-oxide layer-semiconductor-field-effect transistor respectively with the negative pole of battery pack and just (PACK+) of power consumption equipment; the negative pole (PACK-) of negative pole (PACK-) links to each other; the signal input part of described integrating circuit protection module links to each other with the signal output part of signals collecting and comparison module and its signal output part is connected with safeties that are used for switching circuit, and described signals collecting and comparison module signal input part link to each other extremely respectively with the positive and negative of battery pack.
The principle of this circuit board is: with the batteries monomer battery voltage signals collecting; carry out voltage signal relatively by signals collecting, comparison module; by voltage difference between the adjacent monomer battery pack and setting voltage benchmark more in twos; think greater than the state of setting benchmark for detecting cell power-down state signal; protection IC output abnormality signal triggering safeties cut off whole charge and discharge road.
Claims (1)
1. improved lithium ion battery pack protection circuit plate; it comprises lithium ion battery group inte gration circuit protection module; metal-oxide layer-semiconductor-field-effect transistor; the signal output part of described integrating circuit protection module links to each other with the grid of described metal-oxide layer-semiconductor-field-effect transistor; the source electrode of described metal-oxide layer-semiconductor-field-effect transistor links to each other with the negative pole of battery pack and the negative pole of power consumption equipment respectively; it is characterized in that: the signal input part of described integrating circuit protection module links to each other with the signal output part of signals collecting and comparison module and its signal output part is connected with safeties that are used for switching circuit, and described signals collecting and comparison module signal input part link to each other extremely respectively with the positive and negative of battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200989423U CN201134460Y (en) | 2007-12-14 | 2007-12-14 | Protective circuit board of improved lithium ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200989423U CN201134460Y (en) | 2007-12-14 | 2007-12-14 | Protective circuit board of improved lithium ion batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134460Y true CN201134460Y (en) | 2008-10-15 |
Family
ID=40062728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200989423U Expired - Fee Related CN201134460Y (en) | 2007-12-14 | 2007-12-14 | Protective circuit board of improved lithium ion batteries |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134460Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367820A (en) * | 2012-04-06 | 2013-10-23 | 株式会社半导体能源研究所 | Protective circuit module and battery pack |
-
2007
- 2007-12-14 CN CNU2007200989423U patent/CN201134460Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367820A (en) * | 2012-04-06 | 2013-10-23 | 株式会社半导体能源研究所 | Protective circuit module and battery pack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20111214 |