CN216390575U - Charge-discharge detection circuit - Google Patents
Charge-discharge detection circuit Download PDFInfo
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- CN216390575U CN216390575U CN202123142000.XU CN202123142000U CN216390575U CN 216390575 U CN216390575 U CN 216390575U CN 202123142000 U CN202123142000 U CN 202123142000U CN 216390575 U CN216390575 U CN 216390575U
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Abstract
The utility model discloses a charge and discharge detection circuit, which comprises an MOS (metal oxide semiconductor) tube Q1, a triode Q4, resistors R10, R15, R223-225 and R229, and operational amplifiers U19B and U22A; the charging and discharging management chip can still detect and feed back the current of the battery when the battery is charged by trickle, so that the charging and discharging management chip can better control the charging of the battery, the discharging process of the battery can also be better detected and fed back, and the charging and discharging management chip has very good practicability.
Description
Technical Field
The utility model relates to the technical field of electronics, in particular to a charge and discharge detection circuit.
Background
In the battery charge and discharge management circuit, generally, a charge and discharge detection circuit is adopted to feed back the current and voltage of the battery to a charge and discharge management chip to adjust the output voltage/current or the charging voltage/current; therefore, a new scheme of the charge and discharge detection circuit is provided.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a charge and discharge detection circuit.
The technical scheme adopted by the embodiment of the utility model for solving the technical problem is as follows: a charge-discharge detection circuit comprises an MOS tube Q1, a triode Q4, a resistor R10, an R15, R223-225, R229 and operational amplifiers U19B and U22A, wherein the source electrode of the MOS tube Q1 is respectively connected with one end of a charge-discharge management chip U2 and one end of a resistor R15, the other end of the resistor R15 is respectively connected with the grid electrode of the MOS tube Q1 and the collector electrode of the triode Q4 through a resistor R10, the drain electrode of the MOS tube Q1 is respectively connected with the resistor R225 and the non-inverting input end of the operational amplifier U19B through a resistor R229, the other end of the resistor R225 is grounded, the base electrode of the triode Q4 is respectively connected with the charge-discharge management chip U1 through a resistor R223 and the emitter electrode of the triode Q4 through a resistor R224, the inverting input end of the operational amplifier U19B is respectively connected with a ground terminal, the output end of the operational amplifier U19B and a master control chip U1, the positive input end of the operational amplifier U22A is respectively connected with a battery ground terminal and a battery, the inverting input end of the operational amplifier U22A is connected with the charging and discharging management chip U2, the output end of the operational amplifier U22A and the main control chip U1, the power supply end of the operational amplifier U22A is connected with an external power supply, and the grounding end of the operational amplifier U22A is grounded.
Further, a resistor C89 and a resistor R226 are connected in series between the inverting input terminal of the operational amplifier U19B and the output terminal of the operational amplifier U19B.
Further, a resistor C90 and a resistor R227 are connected in series between the inverting input terminal of the operational amplifier U22A and the output terminal of the operational amplifier U22A.
The utility model has the beneficial effects that: a charge-discharge detection circuit comprises an MOS tube Q1, a triode Q4, a resistor R10, an R15, R223-225, R229 and operational amplifiers U19B and U22A, wherein the source electrode of the MOS tube Q1 is respectively connected with one end of a charge-discharge management chip U2 and one end of a resistor R15, the other end of the resistor R15 is respectively connected with the grid electrode of the MOS tube Q1 and the collector electrode of the triode Q4 through a resistor R10, the drain electrode of the MOS tube Q1 is respectively connected with the resistor R225 and the non-inverting input end of the operational amplifier U19B through a resistor R229, the other end of the resistor R225 is grounded, the base electrode of the triode Q4 is respectively connected with the charge-discharge management chip U1 through a resistor R223 and the emitter electrode of the triode Q4 through a resistor R224, the inverting input end of the operational amplifier U19B is respectively connected with a ground terminal, the output end of the operational amplifier U19B and a master control chip U1, the positive input end of the operational amplifier U22A is respectively connected with a battery ground terminal and a battery, the inverting input end of the operational amplifier U22A is connected with the output ends of the charge and discharge management chip U2 and the operational amplifier U22A and the main control chip U1, the power supply end of the operational amplifier U22A is connected with an external power supply, and the grounding end of the operational amplifier U22A is grounded; the charging and discharging management chip can still detect and feed back the current of the battery when the battery is charged by trickle, so that the charging and discharging management chip can better control the charging of the battery, the discharging process of the battery can also be better detected and fed back, and the charging and discharging management chip has very good practicability.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a circuit schematic diagram of a charge and discharge detection circuit.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and greater than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless explicitly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.
Referring to fig. 1, a charge and discharge detection circuit includes a MOS transistor Q1, a transistor Q4, a resistor R10, R15, R223-225, R229 and operational amplifiers U19B and U22A, a source of the MOS transistor Q1 is connected to one end of a charge and discharge management chip U2 and a resistor R15, respectively, another end of the resistor R15 is connected to a gate of the MOS transistor Q1 and a collector of the transistor Q4 via a resistor R10, a drain of the MOS transistor Q1 is connected to a resistor R225 and a non-inverting input terminal of the operational amplifier U19B via a resistor R229, another end of the resistor R225 is grounded, a base of the transistor Q4 is connected to the charge and discharge management chip U1 via a resistor R223 and an emitter of the transistor Q4 via a resistor R224, a inverting input terminal of the operational amplifier U19B is connected to a ground terminal, an output terminal of the operational amplifier U19B and a main control chip U1, respectively, a positive input terminal of the operational amplifier U22 is connected to a ground terminal of the operational amplifier U22A and a battery, the inverting input end of the operational amplifier U22A is connected with the charging and discharging management chip U2, the output end of the operational amplifier U22A and the main control chip U1, the power supply end of the operational amplifier U22A is connected with an external power supply, and the grounding end of the operational amplifier U22A is grounded.
In the utility model, when charging and discharging are detected, the current of the resistor R229 is detected and fed back to the operational amplifier, and the detected current is amplified by the operational amplifier and then input to the main control chip U1, so that the current of the battery can be well fed back to the control chip when the battery is trickle charged, the charging and discharging of the battery can be better controlled, the service life of the battery can be better prolonged, and the charging and discharging safety can be improved.
A resistor C89 and a resistor R226 are connected in series between the inverting input terminal of the operational amplifier U19B and the output terminal of the operational amplifier U19B.
A resistor C90 and a resistor R227 are connected in series between the inverting input end of the operational amplifier U22A and the output end of the operational amplifier U22A; the resistor C89 and the resistor R226, and the resistor C90 and the resistor R227 perform a filtering function.
It is to be understood that the present invention is not limited to the above-described embodiments, and that equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and that such equivalent modifications and substitutions are to be included within the scope of the appended claims.
Claims (3)
1. A charge and discharge detection circuit is characterized in that: the power supply comprises a MOS tube Q1, a triode Q4, resistors R10, R15, R223-225 and R229 and operational amplifiers U19B and U22A, wherein the source electrode of the MOS tube Q1 is respectively connected with one end of a charge-discharge management chip U2 and one end of a resistor R15, the other end of the resistor R15 is respectively connected with the grid electrode of the MOS tube Q1 and the collector electrode of the triode Q4 through a resistor R10, the drain electrode of the MOS tube Q1 is respectively connected with the resistor R225 and the positive input end of the operational amplifier U19B through the resistor R229, the other end of the resistor R225 is grounded, the base electrode of the triode Q4 is respectively connected with the charge-discharge management chip U1 through the resistor R223 and the emitter electrode of the triode Q4 through the resistor R224, the reverse input end of the operational amplifier U19B is respectively connected with the ground terminal, the output end of the operational amplifier U19B and the main control chip U1, the positive input end of the operational amplifier U22A is respectively connected with the ground terminal and the battery, and the reverse input end of the operational amplifier U2 management chip A, The output end of the operational amplifier U22A is connected with the main control chip U1, the power supply end of the operational amplifier U22A is connected with an external power supply, and the grounding end of the operational amplifier U22A is grounded.
2. The charge and discharge detection circuit according to claim 1, wherein: a resistor C89 and a resistor R226 are connected in series between the inverting input end of the operational amplifier U19B and the output end of the operational amplifier U19B.
3. The charge and discharge detection circuit according to claim 1, wherein: a resistor C90 and a resistor R227 are connected in series between the inverting input end of the operational amplifier U22A and the output end of the operational amplifier U22A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123142000.XU CN216390575U (en) | 2021-12-14 | 2021-12-14 | Charge-discharge detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123142000.XU CN216390575U (en) | 2021-12-14 | 2021-12-14 | Charge-discharge detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216390575U true CN216390575U (en) | 2022-04-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123142000.XU Active CN216390575U (en) | 2021-12-14 | 2021-12-14 | Charge-discharge detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216390575U (en) |
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2021
- 2021-12-14 CN CN202123142000.XU patent/CN216390575U/en active Active
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