CN214227880U - Heavy current battery power supply equipment - Google Patents
Heavy current battery power supply equipment Download PDFInfo
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- CN214227880U CN214227880U CN202022923121.7U CN202022923121U CN214227880U CN 214227880 U CN214227880 U CN 214227880U CN 202022923121 U CN202022923121 U CN 202022923121U CN 214227880 U CN214227880 U CN 214227880U
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Abstract
The utility model relates to a heavy current battery power supply unit, this heavy current battery power supply unit, include: the circuit comprises a battery, an anti-reverse connection circuit, a reverse circuit, a first voltage division circuit, a second voltage division circuit and an addition circuit; the positive electrode of the battery is respectively connected with the reverse connection preventing circuit, the first voltage dividing circuit and the load; the negative electrode of the battery is respectively connected with the reverse connection preventing circuit and the reverse circuit; the reverse connection preventing circuit is connected with the load; the second voltage division circuit is respectively connected with the reverse circuit, the reverse connection preventing circuit, the first voltage division circuit and the adding circuit; the first voltage dividing circuit is connected to the adding circuit. According to the technical scheme provided by the application, the voltage can be detected by one IO port, and the accurate battery voltage can be obtained without calculation; and the voltage meeting the analog-to-digital conversion requirement of the MCU can be obtained after the addition circuit.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, concretely relates to heavy current battery power supply unit.
Background
In a large-current battery power supply circuit, if the positive and negative electrodes of a battery are detachable, an anti-reverse connection circuit is often needed to prevent the circuit and the battery from being damaged when the positive and negative electrodes are reversely connected. In a large-current battery power supply circuit, reverse connection prevention protection is generally realized by connecting an MOSFET and an auxiliary circuit thereof between a battery cathode and a circuit ground level, after the reverse connection prevention circuit is connected, the cathode of a battery is not grounded any more, so that the battery voltage cannot be directly detected when the battery voltage is detected in the circuit, only the voltage difference between the MCU ground level and the battery anode is detected, the voltage drop of the MOSFET is different between the detection value and the actual value of the battery voltage, and the voltage drop changes along with the change of temperature and the output current of the battery, so that the judgment of the battery voltage is inaccurate.
Currently, in order to accurately detect the battery voltage, the current detection and the temperature detection of the MOSFET may be used to compensate the battery voltage, but this makes the circuit complicated and requires complicated calculations; the voltage value of the battery cathode can be detected by reversing the voltage of the battery cathode and then added with the voltage value of the battery anode to obtain the voltage value of the battery, but in doing so, two IO ports are needed to detect the voltage and calculate the voltage.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming the not enough of prior art, provide a heavy current battery power supply unit in order to solve among the prior art for the battery voltage who detects heavy current battery power supply circuit causes the complicated and complicated problem of calculation of circuit.
In order to realize the above purpose, the utility model adopts the following technical scheme:
a high current battery powered device comprising: the circuit comprises a battery, an anti-reverse connection circuit, a reverse circuit, a first voltage division circuit, a second voltage division circuit and an addition circuit;
the positive electrode of the battery is respectively connected with the reverse connection preventing circuit, the first voltage dividing circuit and the load;
the negative electrode of the battery is respectively connected with the reverse connection preventing circuit and the reverse circuit;
the reverse connection preventing circuit is connected with a load;
the second voltage division circuit is respectively connected with the reverse circuit, the reverse connection preventing circuit, the first voltage division circuit and the adding circuit;
the first voltage dividing circuit is connected to the adding circuit.
Further, a connection point between the reverse connection preventing circuit and the load is grounded.
Further, the reverse connection prevention circuit includes: MOS pipe Q1, diode D1 and resistor R3;
one end of the resistor R3 is connected with the anode of the battery, and the other end of the resistor R3 is connected with the cathode of the diode D1;
the drain of the MOS transistor Q1 is connected with the cathode of the battery, the gate of the MOS transistor Q1 is connected with the connection point between the resistor R3 and the diode D1, and the source of the MOS transistor Q1 is connected with the anode of the diode D1;
the connection point between the source of the MOS transistor Q1 and the anode of the diode D1 is grounded;
one end of the load is connected with the positive electrode of the battery, and the other end of the load is connected with a connection point between the source electrode of the MOS transistor Q1 and the anode of the diode D1.
Further, the first voltage dividing circuit includes: a resistor R1 and a resistor R4;
one end of the resistor R1 is connected with the positive electrode of the battery, and the other end of the resistor R1 is connected with one end of a resistor R4;
the other end of the resistor R4 is grounded.
Further, the high-current battery power supply device further includes: a resistor R2;
one end of the R2 is connected with the other end of the resistor R1.
Further, the adder circuit includes: an operational amplifier U2, a resistor R5 and a resistor R6;
the other end of the R2 is connected with the non-inverting input end of the operational amplifier U2;
one end of the resistor R5 is connected with the inverting input end of the operational amplifier U2, and the other end of the resistor R5 is grounded;
one end of the resistor R6 is connected with a connection point between the resistor R5 and the inverting input end of the operational amplifier U2, and the other end of the resistor R6 is connected with the output end of the operational amplifier U2.
Further, the inverter circuit includes: a resistor R7, a resistor R10, a resistor R12 and an operational amplifier U1;
one end of the resistor R7 is connected with the source electrode of the MOS transistor Q1, and the other end of the resistor R7 is connected with the non-inverting input end of the operational amplifier U1;
one end of the resistor R10 is connected with the negative electrode of the battery, and the other end of the resistor R10 is connected with the inverting input end of the operational amplifier U1;
one end of the resistor R12 is connected with the inverting input end of the operational amplifier U1, and the other end of the resistor R12 is connected with the output end of the operational amplifier U1;
the resistance value of the resistor R10 is equal to the resistance value of the resistor R12.
Further, the second voltage dividing circuit includes: a resistor R8 and a resistor R11;
one end of the resistor R8 is connected with the output end of an operational amplifier U1, and the other end of the resistor R8 is connected with one end of the resistor R11;
the other end of the resistor R11 is grounded.
Further, the high-current battery power supply device further includes: a resistor R9;
one end of the resistor R9 is connected with a connection point between the resistor R8 and the resistor R11, and the other end of the resistor R11 is connected with a non-inverting input end of an operational amplifier U2.
Furthermore, the resistance ratio of the resistor R1 and the resistor R4 after being connected in series is equal to the resistance ratio of the resistor R8 and the resistor R11 after being connected in series.
The utility model adopts the above technical scheme, the beneficial effect that can reach includes:
the high-current battery power supply equipment is constructed by the battery, the reverse-connection preventing circuit, the reverse circuit, the first voltage division circuit, the second voltage division circuit and the adding circuit, so that the voltage can be detected by one IO port, and accurate battery voltage can be obtained without calculation; and the voltage meeting the analog-to-digital conversion requirement of the MCU can be obtained after the addition circuit.
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, it is obvious that the drawings in the following description are only 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 a large-current battery power supply apparatus of the present invention;
fig. 2 is a schematic diagram of a circuit structure of a large-current battery power supply apparatus of the present invention;
in the figure, BT 1-battery, RL-load resistance.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
A specific high-current battery-powered device provided in the embodiments of the present application will be described with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a heavy current battery power supply equipment, include: the circuit comprises a battery, an anti-reverse connection circuit, a reverse circuit, a first voltage division circuit, a second voltage division circuit and an addition circuit;
the positive electrode of the battery is respectively connected with the reverse connection preventing circuit, the first voltage dividing circuit and the load;
the negative electrode of the battery is respectively connected with the reverse connection preventing circuit and the reverse circuit;
the reverse connection preventing circuit is connected with the load;
the second voltage division circuit is respectively connected with the reverse circuit, the reverse connection preventing circuit, the first voltage division circuit and the adding circuit;
the first voltage dividing circuit is connected to the adding circuit.
It should be noted that, a person skilled in the art can set the power type of the battery according to engineering requirements or experimental data. In some embodiments, the type of battery may be, but is not limited to, a lithium battery, a dry cell, or a lead acid battery.
Further optionally, the connection point between the anti-reverse connection circuit and the load is grounded.
In some alternative embodiments, as shown in fig. 2, a detection point Vb + may be provided at the positive electrode of the battery, but is not limited thereto.
Further optionally, as shown in fig. 2, the reverse connection preventing circuit includes: MOS pipe Q1, diode D1 and resistor R3;
one end of the resistor R3 is connected with the positive electrode of the battery, and the other end of the resistor R3 is connected with the cathode of the diode D1;
the drain of the MOS transistor Q1 is connected with the cathode of the battery, the grid of the MOS transistor Q1 is connected with the connection point between the resistor R3 and the diode D1, and the source of the MOS transistor Q1 is connected with the anode of the diode D1;
the connection point between the source of the MOS transistor Q1 and the anode of the diode D1 is grounded;
one end of the load is connected with the anode of the battery, and the other end of the load is connected with a connection point between the source of the MOS transistor Q1 and the anode of the diode D1.
It should be noted that the type of the diode D1 may be, but is not limited to, a zener diode.
It can be understood that through the reverse connection prevention circuit constructed by the MOS transistor Q1, the diode D1 and the resistor R3, when the battery is connected incorrectly, the positive pole of the battery is connected downwards, and the negative pole of the battery is connected upwards, the MOS transistor Q1 is cut off, and no current flows into the circuit from the battery to be supplied to the load; when the battery is properly connected as shown in the circuit of fig. 2, the MOS transistor Q1 is turned on and the battery voltage is connected to the load to provide current to the load.
Further optionally, as shown in fig. 2, the first voltage dividing circuit includes: a resistor R1 and a resistor R4;
one end of the resistor R1 is connected with the positive electrode of the battery, and the other end of the resistor R1 is connected with one end of the resistor R4;
the other end of the resistor R4 is connected to ground.
Further optionally, the high-current battery power supply device further includes: a resistor R2;
one end of the resistor R2 is connected to the other end of the resistor R1.
Further optionally, the adder circuit includes: an operational amplifier U2, a resistor R5 and a resistor R6;
the other end of the R2 is connected with the non-inverting input end of an operational amplifier U2;
one end of the resistor R5 is connected with the inverting input end of the operational amplifier U2, and the other end of the resistor R5 is grounded;
one end of the resistor R6 is connected to a connection point between the resistor R5 and the inverting input terminal of the operational amplifier U2, and the other end of the resistor R6 is connected to the output terminal of the operational amplifier U2.
In some alternative embodiments, as shown in FIG. 2, the detection point Vo-may be provided, but is not limited to, at the output of the operational amplifier U2. It should be noted that Vo-output is voltage suitable for the analog-to-digital conversion requirement of the MCU, and the value thereof is directly proportional to the battery voltage, thereby achieving the requirement of accurately sampling the battery voltage at an IO port.
Further optionally, as shown in fig. 2, the inverting circuit includes: a resistor R7, a resistor R10, a resistor R12 and an operational amplifier U1;
one end of the resistor R7 is connected with the source electrode of the MOS transistor Q1, and the other end of the resistor R7 is connected with the non-inverting input end of the operational amplifier U1;
one end of the resistor R10 is connected with the negative electrode of the battery, and the other end of the resistor R10 is connected with the inverting input end of the operational amplifier U1;
one end of the resistor R12 is connected to the inverting input terminal of the operational amplifier U1, and the other end of the resistor R12 is connected to the output terminal of the operational amplifier U1.
Further optionally, the resistance of the resistor R10 is equal to the resistance of the resistor R12.
It is easily understood that the resistance of the resistor R10 and the resistance of the resistor R12 are equal, so that the amplification factor of the operational amplifier U1 is 1.
It can be understood that the negative pole of the battery is controlled by the voltage 1 which is negative relative to the ground level through the reverse circuit constructed by the resistor R7, the resistor R10, the resistor R12 and the operational amplifier U1: 1 is converted to a positive voltage Vb-whose absolute values are equal.
Further optionally, as shown in fig. 2, the second voltage dividing circuit includes: a resistor R8 and a resistor R11;
one end of the resistor R8 is connected with the output end of the operational amplifier U1, and the other end of the resistor R8 is connected with one end of the resistor R11;
the other end of the resistor R11 is connected to ground.
In some alternative embodiments, as shown in FIG. 2, a detection point Vb-may be provided at the connection point between, but not limited to, one terminal of resistor R8 and the output of operational amplifier U1.
It can be understood that the first sub-circuit constructed by the resistor R1 and the resistor R4 is a Vb + voltage dividing circuit, the second sub-circuit constructed by the resistor R8 and the resistor R11 is a Vb-voltage dividing circuit, the voltage dividing ratios of the Vb + voltage dividing circuits are the same, and the divided voltage is sent to an adding circuit formed by the operational amplifier U2, the resistor R5 and the resistor R6 through the resistor R2 and the resistor R9.
Further optionally, as shown in fig. 2, the high-current battery-powered device further includes: a resistor R9;
one end of the resistor R9 is connected to a connection point between the resistor R8 and the resistor R11, and the other end of the resistor R11 is connected to the non-inverting input terminal of the operational amplifier U2.
Further optionally, as shown in fig. 2, the resistance ratio between the resistor R1 and the resistor R4 after being connected in series is equal to the resistance ratio between the resistor R8 and the resistor R11 after being connected in series.
It is understood that the inverting circuit is 1:1 negative voltage is converted into positive voltage, because the resistance proportion of the resistor R1 and the resistor R4 which are connected in series and the resistor R8 and the resistor R11 which are connected in series is 1:1, namely the voltage division proportion of the two voltage division circuits is the same, an output voltage value which is in direct proportion to the voltage of the battery is obtained through an addition circuit, the amplification factor of U2 is changed by adjusting a negative feedback resistor R6 of U2, or the voltage division proportion of R1, R4, R8 and R11 is adjusted, and the output voltage can obtain the voltage which meets the requirement of MCU analog-to-digital conversion.
It should be noted that, because the anti-reverse connection circuit is connected between the negative electrode of the battery and the ground level of the circuit, and the detected voltage Vb + cannot completely reflect the voltage of the battery, according to the technical scheme provided by the application, the negative electrode voltage of the battery is reversed, and is sent to the addition circuit after passing through the voltage division circuit with the same voltage division ratio as Vb +, a voltage sampling value proportional to the voltage of the battery is obtained after addition, and the voltage sampling value can be directly connected to the AD sampling interface of the MCU for conversion to obtain the voltage of the battery.
The embodiment of the utility model provides a heavy current battery power supply equipment, including the battery, prevent reverse connection circuit, the reverse circuit, first voltage divider circuit, second voltage divider circuit and addition circuit, the positive pole of battery respectively with prevent reverse connection circuit, first voltage divider circuit and load are connected, the negative pole of battery respectively with prevent reverse connection circuit and reverse circuit connection, prevent reverse connection circuit respectively with the positive pole of battery, the negative pole of battery and the connection of load, the second voltage divider circuit respectively with reverse circuit, prevent reverse connection circuit, first voltage divider circuit and addition circuit connection, not only can realize an IO mouth measuring voltage, need not to calculate can obtain accurate battery voltage; and the voltage meeting the analog-to-digital conversion requirement of the MCU can be obtained after the addition circuit.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A high current battery powered device, comprising: the circuit comprises a battery, an anti-reverse connection circuit, a reverse circuit, a first voltage division circuit, a second voltage division circuit and an addition circuit;
the positive electrode of the battery is respectively connected with the reverse connection preventing circuit, the first voltage dividing circuit and the load;
the negative electrode of the battery is respectively connected with the reverse connection preventing circuit and the reverse circuit;
the reverse connection preventing circuit is connected with a load;
the second voltage division circuit is respectively connected with the reverse circuit, the reverse connection preventing circuit, the first voltage division circuit and the adding circuit;
the first voltage dividing circuit is connected to the adding circuit.
2. A high current battery operated device according to claim 1, wherein the connection point between the anti-reverse connection circuit and the load is grounded.
3. A high current battery power supply apparatus as claimed in claim 1, wherein said anti-reverse circuit comprises: MOS pipe Q1, diode D1 and resistor R3;
one end of the resistor R3 is connected with the anode of the battery, and the other end of the resistor R3 is connected with the cathode of the diode D1;
the drain of the MOS transistor Q1 is connected with the cathode of the battery, the gate of the MOS transistor Q1 is connected with the connection point between the resistor R3 and the diode D1, and the source of the MOS transistor Q1 is connected with the anode of the diode D1;
the connection point between the source of the MOS transistor Q1 and the anode of the diode D1 is grounded;
one end of the load is connected with the positive electrode of the battery, and the other end of the load is connected with a connection point between the source electrode of the MOS transistor Q1 and the anode of the diode D1.
4. A high current battery operated device according to claim 3, wherein said first voltage divider circuit comprises: a resistor R1 and a resistor R4;
one end of the resistor R1 is connected with the positive electrode of the battery, and the other end of the resistor R1 is connected with one end of a resistor R4;
the other end of the resistor R4 is grounded.
5. The high current battery operated device of claim 4, further comprising: a resistor R2;
one end of the R2 is connected with the other end of the resistor R1.
6. A high current battery operated device according to claim 5, wherein the summing circuit comprises: an operational amplifier U2, a resistor R5 and a resistor R6;
the other end of the R2 is connected with the non-inverting input end of the operational amplifier U2;
one end of the resistor R5 is connected with the inverting input end of the operational amplifier U2, and the other end of the resistor R5 is grounded;
one end of the resistor R6 is connected with a connection point between the resistor R5 and the inverting input end of the operational amplifier U2, and the other end of the resistor R6 is connected with the output end of the operational amplifier U2.
7. A high current battery operated device according to claim 6, wherein said reversing circuit comprises: a resistor R7, a resistor R10, a resistor R12 and an operational amplifier U1;
one end of the resistor R7 is connected with the source electrode of the MOS transistor Q1, and the other end of the resistor R7 is connected with the non-inverting input end of the operational amplifier U1;
one end of the resistor R10 is connected with the negative electrode of the battery, and the other end of the resistor R10 is connected with the inverting input end of the operational amplifier U1;
one end of the resistor R12 is connected with the inverting input end of the operational amplifier U1, and the other end of the resistor R12 is connected with the output end of the operational amplifier U1;
the resistance value of the resistor R10 is equal to the resistance value of the resistor R12.
8. A high current battery operated device according to claim 7, wherein said second voltage divider circuit comprises: a resistor R8 and a resistor R11;
one end of the resistor R8 is connected with the output end of an operational amplifier U1, and the other end of the resistor R8 is connected with one end of the resistor R11;
the other end of the resistor R11 is grounded.
9. The high current battery operated device of claim 8, further comprising: a resistor R9;
one end of the resistor R9 is connected with a connection point between the resistor R8 and the resistor R11, and the other end of the resistor R11 is connected with a non-inverting input end of an operational amplifier U2.
10. A high current battery operated device according to claim 3, wherein the ratio of the resistances of the series connected resistor R1 and resistor R4 is equal to the ratio of the resistances of the series connected resistor R8 and resistor R11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022923121.7U CN214227880U (en) | 2020-12-08 | 2020-12-08 | Heavy current battery power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022923121.7U CN214227880U (en) | 2020-12-08 | 2020-12-08 | Heavy current battery power supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214227880U true CN214227880U (en) | 2021-09-17 |
Family
ID=77701905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022923121.7U Active CN214227880U (en) | 2020-12-08 | 2020-12-08 | Heavy current battery power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214227880U (en) |
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2020
- 2020-12-08 CN CN202022923121.7U patent/CN214227880U/en active Active
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