CN217485547U - Overcharge-preventing lithium battery - Google Patents
Overcharge-preventing lithium battery Download PDFInfo
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- CN217485547U CN217485547U CN202123386464.5U CN202123386464U CN217485547U CN 217485547 U CN217485547 U CN 217485547U CN 202123386464 U CN202123386464 U CN 202123386464U CN 217485547 U CN217485547 U CN 217485547U
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- controllable silicon
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Abstract
The utility model relates to an overcharge-prevention lithium battery, which comprises a lithium battery body, a battery cover and a master control PCB board, wherein the lithium battery body is provided with a positive terminal and a negative terminal; the main control PCB board integrates a first bidirectional controllable silicon, a second bidirectional controllable silicon, an electric quantity detection module, a voltage detection module, a processor and a DC-DC converter; the positive terminal is connected with the positive terminal through a first bidirectional controllable silicon; the negative end is connected with a negative terminal through a second bidirectional controllable silicon; the DC-DC converter and the electric quantity detection module are respectively connected with the lithium battery body, the voltage detection module is connected with the positive terminal and the negative terminal, and the first bidirectional controllable silicon, the second bidirectional controllable silicon, the DC-DC converter, the electric quantity detection module and the voltage detection module are respectively connected with the microprocessor. After the overcharge-preventing lithium battery detects that the lithium battery body is charged, the first bidirectional controllable silicon and the second bidirectional controllable silicon are controlled to be disconnected, and overcharge is prevented.
Description
Technical Field
The utility model relates to the technical field of batteries, especially, relate to an anti-overcharging lithium cell.
Background
Lithium batteries are common rechargeable batteries and have high safety. During the charging process of the lithium battery, the lithium battery should be prevented from being overcharged (continuously charged when fully charged), because the overcharge of the lithium battery can cause the structure of the positive electrode material to change, and the explosion of the lithium battery can be seriously caused.
However, in the actual charging process of the lithium battery, people often do not unplug the charging equipment in time (or even forget) to cause the lithium battery to be still in a long-time trickle charging state after being fully charged, which is not beneficial to the safe use of the lithium battery. And seriously, it causes explosion of the lithium battery.
SUMMERY OF THE UTILITY MODEL
Therefore, to foretell problem, the utility model provides a prevent overcharging lithium cell detects the lithium cell and has filled the electricity after, automatic power off prevents to overcharge.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an anti-overcharge lithium battery comprises a lithium battery body, wherein a positive end and a negative end are arranged on the lithium battery body;
the lithium battery comprises a lithium battery body and is characterized by further comprising a battery cover covering the lithium battery body, wherein a positive terminal and a negative terminal are arranged on the battery cover;
the positive terminal and the positive terminal are not contacted with each other, and the negative terminal are not contacted with each other;
the battery cover is characterized by further comprising a main control PCB arranged in the battery cover, and a first bidirectional controllable silicon, a second bidirectional controllable silicon, an electric quantity detection module, a voltage detection module, a processor and a DC-DC converter are integrated on the main control PCB;
a main electrode T1 of the first bidirectional triode thyristor is electrically connected with a positive electrode terminal, and a main electrode T2 of the first bidirectional triode thyristor is electrically connected with a positive electrode terminal;
a main electrode T1 of the second bidirectional thyristor is electrically connected with the negative electrode end, and a main electrode T2 of the second bidirectional thyristor is electrically connected with the negative electrode terminal;
the grid electrode of the first bidirectional controllable silicon and the grid electrode of the second bidirectional controllable silicon are respectively electrically connected with the microprocessor;
the input end of the DC-DC converter is connected with the positive end and the negative end to form a conductive loop, and the output end of the DC-DC converter is electrically connected with the processor to form a wire loop for providing power for the microprocessor;
the input end of the electric quantity detection module is connected with the positive end and the negative end to form a conductive loop, and the output end of the electric quantity detection module is connected with the microprocessor;
the input end of the voltage detection module is connected to the positive terminal and the negative terminal and used for detecting the voltage between the positive terminal and the negative terminal, and the output end of the voltage detection module is connected with the microprocessor.
Furthermore, still be provided with the display screen on the battery cover, the display screen is connected with the microprocessor electricity of master control PCB board.
Furthermore, still be provided with the warning light on the battery cover, the warning light is connected with the microprocessor electricity of master control PCB board.
By adopting the technical scheme, the beneficial effects of the utility model are that: when the lithium battery body is charged, the input voltage between the positive terminal and the negative terminal (hereinafter referred to as charging voltage) is larger than the rated voltage of the lithium battery body (hereinafter referred to as lithium battery rated voltage). Based on the principle, the overcharge-preventing lithium battery detects the electric quantity of the lithium battery body through the electric quantity detection module, when the lithium battery body is fully charged, and the voltage detection module detects that the voltage between the positive terminal and the negative terminal is charging voltage, the processor controls the first bidirectional controllable silicon and the second bidirectional controllable silicon to be cut off, and the lithium battery body is prevented from being continuously charged.
And, when lithium cell body charges and is full of, if voltage detection module detects the voltage size between positive terminal and the negative terminal and be charging voltage, then microprocessor control warning light scintillation, the suggestion user pulls out battery charging outfit. When the voltage between the positive terminal and the negative terminal is less than the charging voltage, the indicator light is turned off.
If the electric quantity detection module detects that the electric quantity of the lithium battery body is not fully charged, and the voltage detection module detects that the voltage between the positive terminal and the negative terminal is charging voltage, the processor judges that the lithium battery body is in a charging state, and the first bidirectional controllable silicon and the second bidirectional controllable silicon are conducted.
If the voltage detection module detects that the voltage between the positive terminal and the negative terminal is less than or equal to the rated voltage of the lithium battery, the microprocessor controls the conduction of the first bidirectional controllable silicon and the second bidirectional controllable silicon. That is, the first bidirectional controllable silicon and the second bidirectional controllable silicon are conducted when the lithium battery body is not discharged or the lithium battery body is discharged.
Drawings
Fig. 1 is an exploded view of an anti-overcharge lithium battery of the present invention;
fig. 2 is a cross-sectional view of an overcharge-prevention lithium battery of the present invention;
fig. 3 is a circuit connection block diagram of the overcharge-preventing lithium battery of the present invention.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1, 2 and 3, the present embodiment provides an overcharge-prevention lithium battery, which includes a lithium battery body 1, wherein the lithium battery body 1 is provided with a positive terminal 11 and a negative terminal 12. The structure of the lithium battery body 1 is the structure of the existing lithium battery, and is not described in detail herein.
The lithium battery comprises a lithium battery body 1 and is characterized by further comprising a battery cover 2 covering the lithium battery body 1, wherein a positive terminal 21, a negative terminal 22, a display screen 4 and a prompt lamp 5 are arranged on the battery cover 2.
The positive terminal 11 and the positive terminal 21 are not in contact with each other; in other words, there is no direct electrical contact between the positive terminal 11 and the positive terminal 21. The negative terminal 12 and the negative terminal 22 are not in contact with each other; in other words, there is no direct electrical contact between the negative terminal 12 and the negative terminal 22.
The battery cover is characterized by further comprising a main control PCB (printed circuit board) 3 arranged in the battery cover 2, wherein a microprocessor 31, a first bidirectional controllable silicon 32, a second bidirectional controllable silicon 33, a voltage detection module 34, a DC-DC (direct current-direct current) converter 35 and an electric quantity detection module 36 are integrated on the main control PCB 3. In this embodiment, the microprocessor 31 preferably employs an MT8980 processor.
The first triac 32, the second triac 33, the voltage detection module 34, the DC-DC converter 35 and the power detection module 36 are all conventional electronic components.
The main electrode T1 of the first triac 32 is electrically connected to the positive terminal 11, and the main electrode T2 of the first triac 32 is electrically connected to the positive terminal 21.
The main electrode T1 of the second triac 33 is electrically connected to the negative terminal 12, and the main electrode T2 of the second triac 33 is electrically connected to the negative terminal 22.
The gate of the first triac 32 and the gate of the second triac 33 are electrically connected to the microprocessor 31, respectively.
The input end of the DC-DC converter 35 is connected to the positive terminal 11 and the negative terminal 12 to form a conductive loop, and the output end of the DC-DC converter 35 is electrically connected to the processor 31 to form a wire loop for providing power to the microprocessor 31.
The input end of the electric quantity detection module 36 is connected to the positive electrode end 11 and the negative electrode end 12 to form a conductive loop, and the output end of the electric quantity detection module 36 is connected to the microprocessor 31; the electric quantity of the lithium battery body 1 is detected by the electric quantity detection module 36 and transmitted to the microprocessor 31. The microprocessor 31 controls the display screen 4 to display the power information.
The input end of the voltage detection module 34 is connected to the positive terminal 21 and the negative terminal 22 for detecting the voltage between the positive terminal 21 and the negative terminal 22, and the output end of the voltage detection module 34 is connected to the microprocessor 31.
The display screen 4 and the prompting lamp 5 are respectively and electrically connected with the microprocessor 31 of the main control PCB board 3.
The working principle is as follows:
when the lithium battery body 1 is charged, the input voltage (hereinafter referred to as charging voltage) between the positive terminal 21 and the negative terminal 22 is larger than the rated voltage (hereinafter referred to as lithium battery rated voltage) of the lithium battery body 1.
Based on the principle, the overcharge-preventing lithium battery detects the electric quantity of the lithium battery body 1 through the electric quantity detection module 36, when the lithium battery body 1 is fully charged, and the voltage detection module 34 detects that the voltage between the positive terminal 21 and the negative terminal 22 is the charging voltage, the processor 31 controls the first bidirectional controllable silicon 32 and the second bidirectional controllable silicon 33 to be cut off, so as to prevent (the charging devices externally connected to the positive terminal 21 and the negative terminal 22) from continuously charging the lithium battery body 1.
And, when lithium cell body 1 charges fully, if voltage detection module 34 detects the voltage magnitude between positive terminal 21 and negative terminal 22 to be charging voltage, then microprocessor 31 controls warning light 5 to blink, and the suggestion user pulls out the battery charging outfit. When the voltage between the positive terminal 21 and the negative terminal 22 is less than the charging voltage, the warning lamp 5 is turned off.
If the electric quantity detection module 36 detects that the lithium battery body 1 is not fully charged, and the voltage detection module 34 detects that the voltage between the positive terminal 21 and the negative terminal 22 is the charging voltage, the processor 31 determines that the lithium battery body 1 is in the charging state, the first bidirectional thyristor 32 and the second bidirectional thyristor 33 are conducted, and the lithium battery body 1 is continuously charged.
If the voltage detection module 36 detects that the voltage between the positive terminal 21 and the negative terminal 22 is less than or equal to the rated voltage of the lithium battery, the microprocessor 31 controls the first triac 32 and the second triac 33 to be conducted. That is, the first triac 32 and the second triac 33 are turned on when the lithium battery body 1 is not discharged or the lithium battery body 1 is discharged.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. The utility model provides a prevent overcharging lithium cell, includes lithium cell body, last positive terminal and the negative pole end of being provided with of lithium cell body, its characterized in that:
the lithium battery comprises a lithium battery body and is characterized by further comprising a battery cover covering the lithium battery body, wherein a positive terminal and a negative terminal are arranged on the battery cover;
the positive terminal and the positive terminal are not in contact with each other, and the negative terminal are not in contact with each other;
the battery cover is characterized by further comprising a main control PCB arranged in the battery cover, wherein a first bidirectional controllable silicon, a second bidirectional controllable silicon, an electric quantity detection module, a voltage detection module, a processor and a DC-DC converter are integrated on the main control PCB;
a main electrode T1 of the first bidirectional thyristor is electrically connected with the positive terminal, and a main electrode T2 of the first bidirectional thyristor is electrically connected with the positive terminal;
a main electrode T1 of the second bidirectional thyristor is electrically connected with a negative terminal, and a main electrode T2 of the second bidirectional thyristor is electrically connected with a negative terminal;
the grid electrode of the first bidirectional controllable silicon and the grid electrode of the second bidirectional controllable silicon are respectively electrically connected with the microprocessor;
the input end of the DC-DC converter is connected with the positive end and the negative end to form a conductive loop, and the output end of the DC-DC converter is electrically connected with the processor to form a wire loop to provide power for the microprocessor;
the input end of the electric quantity detection module is connected with the positive end and the negative end to form a conductive loop, and the output end of the electric quantity detection module is connected with the microprocessor;
the input end of the voltage detection module is connected with the positive terminal and the negative terminal and used for detecting the voltage between the positive terminal and the negative terminal, and the output end of the voltage detection module is connected with the microprocessor.
2. The anti-overcharge lithium battery of claim 1, wherein: the battery cover is further provided with a display screen, and the display screen is electrically connected with the microprocessor of the main control PCB.
3. An overcharge-prevention lithium battery as claimed in claim 1 or 2, wherein: still be provided with the warning light on the battery lid, the warning light is connected with the microprocessor electricity of master control PCB board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123386464.5U CN217485547U (en) | 2021-12-30 | 2021-12-30 | Overcharge-preventing lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123386464.5U CN217485547U (en) | 2021-12-30 | 2021-12-30 | Overcharge-preventing lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217485547U true CN217485547U (en) | 2022-09-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123386464.5U Active CN217485547U (en) | 2021-12-30 | 2021-12-30 | Overcharge-preventing lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217485547U (en) |
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2021
- 2021-12-30 CN CN202123386464.5U patent/CN217485547U/en active Active
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