CN209844542U - Battery protection circuit - Google Patents
Battery protection circuit Download PDFInfo
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- CN209844542U CN209844542U CN201920982511.6U CN201920982511U CN209844542U CN 209844542 U CN209844542 U CN 209844542U CN 201920982511 U CN201920982511 U CN 201920982511U CN 209844542 U CN209844542 U CN 209844542U
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- control chip
- battery
- battery pack
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Abstract
The utility model discloses a battery protection circuit, include: the device comprises a voltage reduction circuit, a key button, a main control chip, a battery voltage detection circuit, a string number selection circuit, a digital display circuit, a USB port output circuit and a battery pack; the voltage reduction circuit, the key button, the battery voltage detection circuit, the string number selection circuit, the digital display circuit and the USB port output circuit are connected with the main control chip, and the voltage reduction circuit, the battery voltage detection circuit and the USB port output circuit are connected with the battery pack. The utility model discloses a battery protection circuit uses inside wire jumper mode, under the prerequisite of same piece of base plate, can compatible four strings of lithium cell groups and five strings of lithium cell groups behind the change wire jumper, and the capacity that sets up portable power source in a flexible way can the residual capacity of visual display battery, has increased USB output function, supports the highest 3.1A electric current of output, possesses the fuse function, furthest protection user safety, the daily life needs that satisfy people that can the aspect.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery protection circuit.
Background
In recent years, along with the continuous development of mobile power supplies, mobile charging equipment such as a mobile power bank and a mobile charger are widely applied to daily life of people, but the battery core of the mobile charging equipment is generally a lithium battery, so that the service life of the mobile charging equipment is limited, different equipment has different capacity requirements on the charging equipment, the battery core of the mobile charging equipment is not easy to replace, meanwhile, the battery output does not have a protection function, and the display of the residual capacity is not accurate.
Accordingly, there is a need in the art for improvements.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem who solves is: a battery protection circuit is provided to solve the problems in the prior art.
According to the utility model discloses an aspect of the embodiment discloses a battery protection circuit, include:
the device comprises a voltage reduction circuit, a key button, a main control chip, a battery voltage detection circuit, a string number selection circuit, a digital display circuit, a USB port output circuit and a battery pack;
the voltage reduction circuit is connected with the main control chip and the battery pack, converts the voltage of the battery pack into the voltage required by the operation of the main control chip and supplies power to the main control chip;
the key button is connected with the main control chip and used for inputting a key signal to the main control chip and adjusting the working parameters and/or the working state of the main control chip;
the battery voltage detection circuit is connected with the battery pack and the main control chip, detects the voltage of the current battery pack and outputs the detection result to the main control chip;
the string number selection circuit is connected with the main control chip, and the main control chip is connected with the battery packs with different string numbers by setting a connection adjusting line of the string number selection circuit;
the digital display circuit is connected with the main control chip and is used for displaying the residual electric quantity of the battery pack at the current period controlled by the main control chip;
the USB port output circuit is connected with the battery pack and the main control chip, and the USB port output circuit transmits power from the battery pack according to set output voltage and current parameters under the control of the main control chip.
Based on another embodiment of the above battery protection circuit of the present invention, the main control chip is an HR7P169B-TSSOP20 chip.
Based on the utility model discloses in another embodiment of above-mentioned battery protection circuit, the number of clusters selection circuit includes four strings of group battery selection circuits and five strings of group battery selection circuits.
Based on the utility model discloses in another embodiment of above-mentioned battery protection circuit, digital display circuit includes 3-digit digital display tube, and the scope that shows the residual capacity is 0% to 100%.
Based on the utility model discloses in another embodiment of above-mentioned battery protection circuit, USB mouth output circuit includes insurance module, insurance module is used for making output load no longer than the current value of settlement.
Based on the utility model discloses in another embodiment of above-mentioned battery protection circuit, USB mouthful output circuit's maximum output current is 3.1A.
In another embodiment of the above battery protection circuit of the present invention, the voltage reduction circuit includes an ME6203-SOT89 voltage reduction chip.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model discloses a battery protection circuit uses inside wire jumper mode, under the prerequisite of same piece of base plate, can compatible four strings of lithium cell groups and five strings of lithium cell groups behind the change wire jumper, and the capacity that sets up portable power source in a flexible way can the residual capacity of visual display battery, has increased USB output function, supports the highest 3.1A electric current of output, possesses the fuse function, furthest protection user safety, the daily life needs that satisfy people that can the aspect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the battery protection circuit of the present invention.
In the figure: 1 voltage reduction circuit, 2 key buttons, 3 main control chip, 4 battery voltage detection circuits, five-string number selection circuit, 6 digital display circuit, 7 USB port output circuit and 8 battery pack.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below 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 following describes a battery protection circuit according to the present invention in more detail with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic structural diagram of an embodiment of the battery protection circuit of the present invention, and as shown in fig. 1, the battery protection circuit of the embodiment includes:
the device comprises a voltage reduction circuit 1, a key button 2, a main control chip 3, a battery voltage detection circuit 4, a serial number selection circuit 5, a digital display circuit 6, a USB port output circuit 7 and a battery pack 8;
the voltage reduction circuit 1 is connected with the main control chip 3 and the battery pack 8, and the voltage reduction circuit 1 converts the voltage of the battery pack 8 into the voltage required by the operation of the main control chip 3 and supplies power to the main control chip 3; the voltage reduction circuit 1 is used for performing direct current conversion on the output voltage of the battery pack 8, outputting the converted voltage to the main control chip 3, and the input voltage of the main control chip 3 is 5V, so that the output voltage of the voltage reduction circuit 1 is 5V, and the voltage reduction circuit 1 comprises an ME6203-SOT89 voltage reduction chip which comprises three pins, namely a voltage input pin, a voltage output pin and a grounding pin.
The key button 2 is connected with the main control chip 3, a control signal is input to the main control chip 3 through the key button 2, and working parameters and/or working states of the main control chip 3 are adjusted, the key button 2 comprises a plurality of alternative selection circuits, the chip of the alternative selection circuits is an SW-SW2 chip, different working state parameters can be set through the combination of the plurality of alternative selection circuits of the key button 2, and switching states controlled by the main control chip 3, such as switching power supply output and switching power supply input, can also be set through the alternative selection circuits;
the battery voltage detection circuit 4 is connected with the battery pack 8 and the main control chip 3, the battery voltage detection circuit 4 is used for detecting the current voltage of the battery pack 8 and outputting voltage parameters to the main control chip 3, and the power consumption of the equipment can be reduced through the detection of the battery voltage detection circuit 4;
the string number selection circuit 5 is connected with the main control chip 3, and the main control chip 3 is connected with the battery packs 8 with different string numbers by setting a connection adjusting line of the string number selection circuit 5; in an embodiment of the present invention, the string number selection circuit 5 includes four strings of battery pack 8 selection circuits and five strings of battery pack 8 selection circuits.
The digital display circuit 6 is connected with the main control chip 3 and is used for displaying the residual electric quantity of the current battery pack 8 controlled by the main control chip 3; the digital display circuit 6 comprises a 3-digit digital display tube, and the range of displaying the residual electric quantity is 0% to 100%.
The USB port output circuit 7 is connected with the battery pack 8 and the main control chip 3, and the USB port output circuit 7 transmits power from the battery pack 8 according to set output voltage and current parameters under the control of the main control chip 3. The USB port output circuit 7 includes a safety module, and the safety module is used to make the output load not exceed a set current value. The maximum output current of the USB port output circuit 7 is 3.1A.
The main control chip 3 is an HR7P169B-TSSOP20 chip, an intelligent algorithm is arranged in the chip, the residual capacity of the battery can be judged according to the change of the voltage point, and the output function of the whole battery pack is controlled.
The above detailed description is made on the battery protection circuit and the system provided by the present invention, and the specific examples are applied herein to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (7)
1. A battery protection circuit, comprising:
the device comprises a voltage reduction circuit, a key button, a main control chip, a battery voltage detection circuit, a string number selection circuit, a digital display circuit, a USB port output circuit and a battery pack;
the voltage reduction circuit is connected with the main control chip and the battery pack, converts the voltage of the battery pack into the voltage required by the operation of the main control chip and supplies power to the main control chip;
the key button is connected with the main control chip and used for inputting a key signal to the main control chip and adjusting the working parameters and/or the working state of the main control chip;
the battery voltage detection circuit is connected with the battery pack and the main control chip, detects the voltage of the current battery pack and outputs the detection result to the main control chip;
the string number selection circuit is connected with the main control chip, and the main control chip is connected with the battery packs with different string numbers by setting a connection adjusting line of the string number selection circuit;
the digital display circuit is connected with the main control chip and is used for displaying the residual electric quantity of the battery pack at the current period controlled by the main control chip;
the USB port output circuit is connected with the battery pack and the main control chip, and the USB port output circuit transmits power from the battery pack according to set output voltage and current parameters under the control of the main control chip.
2. The battery protection circuit of claim 1, wherein the master control chip is an HR7P169B-TSSOP20 chip.
3. The battery protection circuit of claim 1, wherein the string number selection circuit comprises four strings of battery pack selection circuits and five strings of battery pack selection circuits.
4. The battery protection circuit of claim 1, wherein the digital display circuit comprises a 3-digit display tube, and the display residual capacity ranges from 0% to 100%.
5. The battery protection circuit of claim 1, wherein the USB port output circuit comprises a fuse module configured to prevent the output load from exceeding a set current value.
6. The battery protection circuit of claim 1, wherein the maximum output current of the USB port output circuit is 3.1A.
7. The battery protection circuit of claim 1, wherein the voltage reduction circuit comprises an ME6203-SOT89 voltage reduction chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920982511.6U CN209844542U (en) | 2019-06-27 | 2019-06-27 | Battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920982511.6U CN209844542U (en) | 2019-06-27 | 2019-06-27 | Battery protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209844542U true CN209844542U (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920982511.6U Active CN209844542U (en) | 2019-06-27 | 2019-06-27 | Battery protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209844542U (en) |
-
2019
- 2019-06-27 CN CN201920982511.6U patent/CN209844542U/en active Active
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