CN211295290U - Overcharge and overdischarge self-protection lithium battery - Google Patents
Overcharge and overdischarge self-protection lithium battery Download PDFInfo
- Publication number
- CN211295290U CN211295290U CN201921871434.3U CN201921871434U CN211295290U CN 211295290 U CN211295290 U CN 211295290U CN 201921871434 U CN201921871434 U CN 201921871434U CN 211295290 U CN211295290 U CN 211295290U
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- Prior art keywords
- protection
- board
- lithium battery
- execution terminal
- overcharge
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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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a lithium battery with self-protection function by over-charge and over-discharge, which comprises a lithium battery core and a protection board directly soldered with the lithium battery core, wherein the protection board consists of a power control integration board, a switch control board and a protection board output end; the power supply control integrated board is provided with an inspection terminal, a discharge protection execution terminal and a charge protection execution terminal, and the inspection terminal is electrically connected with the positive electrode at the output end of the protection board; and the discharge protection execution terminal and the charge protection execution terminal are both electrically connected with the negative electrode at the output end of the protection plate. The utility model discloses detect the charging and the discharge process of lithium cell constantly, when the trouble takes place, can in time detect and protect charging and discharging circuit to reach the purpose of protection lithium cell.
Description
Technical Field
The utility model relates to a lithium cell technical field specifically is a lithium cell of putting self preservation and protecting is crossed to overcharge.
Background
The lithium ion battery has high energy density and high average output voltage. Small self-discharge, good battery, below 2% per month (recoverable). Excellent cycle performance, rapid charge and discharge, high charging efficiency up to 100%, and high output power. Lithium battery protection circuit among the prior art adopts complicated detection circuitry mostly, and is with high costs, and the reliability is low, and the detection to the short circuit is realized through software more, and when the electric current exceeded short circuit current threshold value, just sent protection instruction, response speed is relatively poor. When the short circuit fault disappears, the BMS needs to be powered down and restarted, and the battery can be recovered to work normally.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiencies of the prior art, the utility model provides a lithium battery that overcharge and overdischarge self preservation protect.
The utility model provides a technical scheme that its technical problem adopted is:
the lithium battery comprises a lithium battery cell and a protection board directly connected with the lithium battery cell in a tin soldering mode, wherein the protection board consists of a power supply control integrated board, a switch control board and a protection board output end;
the power supply control integrated board is provided with an inspection terminal, a discharge protection execution terminal and a charge protection execution terminal, and the inspection terminal is electrically connected with the positive electrode at the output end of the protection board; and the discharge protection execution terminal and the charge protection execution terminal are both electrically connected with the negative electrode at the output end of the protection plate.
As an optimized technical scheme, the switch control panel sets up between lithium cell and power control integrated board, the input and the protection shield output electricity of switch control panel are connected, the output and the lithium cell electricity of the control panel of switch are connected.
As an optimized technical scheme of the utility model, the one end of lithium cell is provided with anodal ear, is connected with the direct tin soldering of protection shield by anodal ear.
As an optimized technical scheme of the utility model, be provided with the metal cap, place in the metal cap in the protection shield.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses detect the charging and the discharge process of lithium cell constantly, when the trouble takes place, can in time detect and protect charging and discharging circuit to reach the purpose of protection lithium cell.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a lithium battery cell according to an embodiment of the present invention.
Reference numbers in the figures: 1-lithium cell, 2-metal cap, and 3-positive tab.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a lithium cell of putting self preservation protection is crossed to overcharge, is shown according to fig. 1, includes lithium cell 1 and the protection shield of being connected with the direct tin soldering of lithium cell 1, still is provided with metal cap 2 simultaneously, place in metal cap 2 in the protection shield, the one end of lithium cell is provided with anodal ear 3, is connected with the direct tin soldering of protection shield by anodal ear 3.
The protection board consists of a power supply control integrated board, a switch control board and a protection board output end; the power supply control integrated board is provided with an inspection terminal, a discharge protection execution terminal and a charge protection execution terminal, and the inspection terminal is electrically connected with the positive electrode at the output end of the protection board; the discharging protection execution terminal and the charging protection execution terminal are both electrically connected with the negative pole of the output end of the protection plate. When the positive pole and the negative pole of protection shield output do not have the output, the protection shield is being in the protection state, when the short circuit takes place in the charging process promptly, at this moment and can activate the protection shield, discharge protection execution terminal and the protection execution terminal that charges all can be in low level state, thereby close the on-off control board, because the on-off control board sets up between lithium cell 1 and power control integrated board, the input and the protection shield output electricity of on-off control board are connected, the output and the lithium cell 1 electricity of the control panel of switch are connected, thereby the output that has cut off the on-off control board makes the unable output to the lithium cell of electric current, further prevent that the circuit from having taken place the.
Similarly, when the lithium battery cell 1 is in a charging state, the charging current charges the lithium battery cell 1 through the switch control board, the voltage of the battery cell gradually increases along with the charging, when the voltage increases to exceed the voltage (generally 4.3V, exceeding the value is in an overcharge voltage) defined by the protection board, the charge protection execution terminal can cut off the switch control board corresponding to the output end of the protection board along with the output of a high level, the charge loop is also disconnected, and the overcharge protection is achieved.
After the overcharge protection, the voltage of the lithium battery cell 1 may drop until the voltage drops to a voltage value defined by the protection board (generally 4.1V, commonly referred to as an overcharge protection recovery voltage), at which time the charge protection execution terminal may recover to a low-voltage state, and the switch control board may be turned on again.
When the lithium battery cell 1 is in a discharge state, along with the progress of discharge of the lithium battery cell 1, when the voltage of the lithium battery cell 1 drops to a voltage value (generally 2.4V, which is lower than the voltage value and is at an over-discharge protection voltage) defined by the protection board, the discharge protection execution terminal also cuts off the switch control board corresponding to the output end of the protection board along with the output of a high level, and the discharge loop is disconnected, so that the over-discharge protection is achieved.
When the voltage of the lithium battery cell 1 rises after the over-discharge protection, when the voltage rises to a voltage value limited by the protection board (generally 3.0V, generally referred to as an over-discharge protection recovery voltage), the discharge protection execution terminal returns to a low level state, and the switch control board is turned on again.
The charging and discharging processes of the lithium battery cell 1 are constantly detected, and when a fault occurs, the charging and discharging circuit can be timely detected and protected, so that the purpose of protecting the lithium battery cell 1 is achieved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (4)
1. The utility model provides a lithium cell of overcharge and overdischarge self preservation protection which characterized in that: the lithium battery protection device comprises a lithium battery cell and a protection board directly connected with the lithium battery cell in a tin soldering mode, wherein the protection board consists of a power supply control integrated board, a switch control board and a protection board output end;
the power supply control integrated board is provided with an inspection terminal, a discharge protection execution terminal and a charge protection execution terminal, and the inspection terminal is electrically connected with the positive electrode at the output end of the protection board; and the discharge protection execution terminal and the charge protection execution terminal are both electrically connected with the negative electrode at the output end of the protection plate.
2. The overcharge-overdischarge self-protection lithium battery of claim 1, wherein: the switch control panel sets up between lithium cell and power control integrated board, the input and the protection shield output electricity of switch control panel are connected, the output and the lithium cell electricity of the control panel of switch are connected.
3. The overcharge-overdischarge self-protection lithium battery of claim 1, wherein: and one end of the lithium battery cell is provided with a positive lug which is directly connected with the protection plate in a tin soldering manner.
4. The overcharge-overdischarge self-protection lithium battery of claim 1, wherein: the protection plate is arranged in the metal cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921871434.3U CN211295290U (en) | 2019-11-01 | 2019-11-01 | Overcharge and overdischarge self-protection lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921871434.3U CN211295290U (en) | 2019-11-01 | 2019-11-01 | Overcharge and overdischarge self-protection lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211295290U true CN211295290U (en) | 2020-08-18 |
Family
ID=72018561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921871434.3U Expired - Fee Related CN211295290U (en) | 2019-11-01 | 2019-11-01 | Overcharge and overdischarge self-protection lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211295290U (en) |
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2019
- 2019-11-01 CN CN201921871434.3U patent/CN211295290U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200818 Termination date: 20211101 |