CN214795129U - Battery voltage detection circuit - Google Patents
Battery voltage detection circuit Download PDFInfo
- Publication number
- CN214795129U CN214795129U CN202120780558.1U CN202120780558U CN214795129U CN 214795129 U CN214795129 U CN 214795129U CN 202120780558 U CN202120780558 U CN 202120780558U CN 214795129 U CN214795129 U CN 214795129U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- battery
- switch
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a battery voltage detection circuit relates to voltage detection technical field, including switch circuit and bleeder circuit, switch circuit and bleeder circuit electric connection, switch circuit are external to have the battery power, examine time measuring when needs to battery voltage, through opening switch circuit, switch on bleeder circuit and battery power, bleeder circuit be provided with AD converter's port, this bleeder voltage is after the partial pressure of realization to the battery power, AD converter's port obtains the sampling voltage who is used for matcing multiple specification AD converter, through the improvement of structure, can connect multiple AD converter, the effectual cost of having practiced thrift, the simple structure of product moreover, it is compatible strong, can be applied to in the middle of the multiple circuit, the reliability is high.
Description
Technical Field
The utility model relates to a voltage detection technical field relates to a battery voltage detection circuit particularly.
Background
At present, in many battery voltage detection circuits, the AD converter type that the AD port is connected is too single, and an AD port can only connect the AD converter of a type, can not the AD converter of multiple model is connected wantonly to an AD port, leads to needing to change the AD port that different in the actual work and just can connect the AD converter that corresponds, and is with high costs, and in the change process, if the mistake appears, the AD port is not corresponding with the AD converter, and the short circuit takes place for the circuit, can cause the conflagration when serious.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiency of the prior art, the utility model discloses can match multiple AD converter.
The utility model provides a technical scheme that its technical problem adopted is:
a battery voltage detection circuit comprises a switch circuit and a voltage division circuit, wherein the switch circuit is electrically connected with the voltage division circuit and is externally connected with a battery power supply;
when the voltage of the battery needs to be detected, the voltage division circuit and the battery power supply are switched on by opening the switch circuit;
the voltage division circuit is provided with a port of the AD converter, and after voltage division of the battery power supply is realized, the port of the AD converter obtains sampling voltage matched with the AD converters of various specifications.
As an improvement of the above technical solution, the switch circuit includes a first switch, a second switch and a pull-up resistor R1, the first switch is a triode Q1, and the second switch is a field effect transistor Q2;
the base terminal of the triode Q1 is externally connected with a processing module, the emitter terminal is grounded, the collector terminal of the triode Q1 is connected with the source gate of the field effect transistor Q2 and is connected to the source electrode of the Q2 through a pull-up resistor R1, and the drain terminal of the field effect transistor Q2 is connected with a voltage division circuit.
As a further improvement of the above technical solution, the voltage dividing circuit includes a voltage dividing resistor R2 and a voltage dividing resistor R3, one end of the voltage dividing resistor R2 is connected to the drain end of the field effect transistor Q2, the other end of the voltage dividing resistor R2 is grounded through a voltage dividing resistor R3, and an AD port is provided between the voltage dividing resistor R2 and the voltage dividing resistor R3, and the AD port is used for connecting various AD converters.
As a further improvement of the technical scheme, the model of the triode Q1 is PDTC124 ET.
As a further improvement of the technical scheme, the model of the field effect transistor Q2 is DMP 2305U.
As a further improvement of the technical scheme, the grid end of the field effect transistor Q2 is connected with a battery power supply.
The utility model has the advantages that: the utility model discloses a multiple AD converter can be connected in the improvement of structure, the effectual cost of having practiced thrift, and the simple structure of product moreover, it is compatible strong, can be applied to in the middle of the multiple circuit, the reliability is high.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
fig. 2 is a flow chart of battery capacity calculation.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.
Referring to fig. 1, the utility model discloses a battery voltage detection circuit, including switch circuit and bleeder circuit, switch circuit and bleeder circuit electric connection, switch circuit are external to have the battery power, examine time measuring when needs to battery voltage, through opening switch circuit, switch on bleeder circuit and battery power, bleeder circuit be provided with the port of AD converter, this bleeder voltage is after the realization is to the partial pressure of battery power, the port of AD converter obtains being used for matcing multiple specification AD converter's sampling voltage. The switch circuit comprises a first switch, a second switch and a pull-up resistor R1, wherein the first switch is a triode Q1, the second switch is a field effect transistor Q2, the base end of the triode Q1 is externally connected with a processing module, the emitter end is grounded, the collector end of the triode Q1 is connected with the grid of a field effect transistor Q2 and is connected to the source of the Q2 through the pull-up resistor R1, and the drain end of the field effect transistor Q2 is connected with a voltage division circuit. Bleeder circuit includes divider resistance R2 and divider resistance R3, and divider resistance R2 one end is connected with field effect transistor Q2's drain end, and divider resistance R2's the other end passes through divider resistance R3 ground connection, and is equipped with the AD port between divider resistance R2 and the divider resistance R3, the AD port is used for connecting multiple AD converter.
In the technical scheme, the voltage dividing circuit reduces the voltage of the battery to a voltage value suitable for a port of the AD converter in proportion, and the AD converter realizes analog-to-digital conversion and data acquisition. In the circuit of the battery voltage detection module, a triode Q1, a field effect transistor Q2 and a resistor R1 form a switch circuit, a voltage division resistor R2 and a voltage division resistor R3 form a voltage division circuit, and when the battery voltage needs to be detected, the processing module controls the switch circuit to turn on the field effect transistor Q2 and switch on the voltage division circuit and the battery power supply. After the 4.2V battery voltage is divided by the resistors R3 and R2, 2.946V sampling voltage can be obtained at the AD port, and the voltage can be matched with most AD converters. When the battery voltage does not need to be detected, the processing module can close the field effect transistor Q2, and the battery power loss caused by the voltage dividing resistors R3 and R2 is prevented.
And finally, the processing module comprises an operation processor, the operation processor acquires the battery voltage data from the voltage detection module, and referring to fig. 2, after calculation, the battery capacity is stored, and the charging control module is controlled according to the battery capacity to select proper charging current to charge the battery. When the operation processor is ready to charge the battery, the operation processor firstly inquires the battery capacity record in the memory, if the record exists, the proper charging current can be directly selected according to the recorded capacity, and if the record does not exist, the operation processor enters a pre-charging process to calculate the battery capacity.
The utility model has the advantages that: the utility model discloses a multiple AD converter can be connected in the improvement of structure, the effectual cost of having practiced thrift, and the simple structure of product moreover, it is compatible strong, can be applied to in the middle of the multiple circuit, the reliability is high.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (6)
1. A battery voltage detection circuit is characterized by comprising a switch circuit and a voltage division circuit, wherein the switch circuit is electrically connected with the voltage division circuit and is externally connected with a battery power supply;
when the voltage of the battery needs to be detected, the voltage division circuit and the battery power supply are switched on by opening the switch circuit;
the voltage division circuit is provided with a port of the AD converter, and after voltage division of the battery power supply is realized, the port of the AD converter obtains sampling voltage matched with the AD converters of various specifications.
2. The battery voltage detecting circuit of claim 1, wherein the switch circuit comprises a first switch, a second switch and a pull-up resistor R1, the first switch is a transistor Q1, the second switch is a fet Q2;
the base terminal of the triode Q1 is externally connected with a processing module, the emitter terminal is grounded, the collector terminal of the triode Q1 is connected with the source gate of the field effect transistor Q2 and is connected to the source electrode of the Q2 through a pull-up resistor R1, and the drain terminal of the field effect transistor Q2 is connected with a voltage division circuit.
3. The battery voltage detection circuit of claim 2, wherein the voltage divider circuit comprises a voltage divider resistor R2 and a voltage divider resistor R3, one end of the voltage divider resistor R2 is connected to the drain terminal of the fet Q2, the other end of the voltage divider resistor R2 is connected to the emitter terminal of the transistor Q1 via a voltage divider resistor R3, and an AD port is provided between the voltage divider resistor R2 and the voltage divider resistor R3, and the AD port is used for connecting various AD converters.
4. A battery voltage detection circuit according to any of claims 2-3, wherein said transistor Q1 is of type PDTC124 ET.
5. A battery voltage detection circuit according to any of claims 2-3, wherein said fet Q2 is of the type DMP 2305U.
6. The battery voltage detection circuit according to claim 5, wherein the gate terminal of the FET Q2 is connected to a battery power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120780558.1U CN214795129U (en) | 2021-04-15 | 2021-04-15 | Battery voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120780558.1U CN214795129U (en) | 2021-04-15 | 2021-04-15 | Battery voltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214795129U true CN214795129U (en) | 2021-11-19 |
Family
ID=78687257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120780558.1U Active CN214795129U (en) | 2021-04-15 | 2021-04-15 | Battery voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214795129U (en) |
-
2021
- 2021-04-15 CN CN202120780558.1U patent/CN214795129U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101191825B (en) | Direct-current power supply detection device | |
| CN103605017A (en) | Detection method of vehicle switch quantity signal | |
| CN111313515A (en) | Multi-output-port fast charging switching circuit and method | |
| CN206041466U (en) | Take switching power supply circuit of excess temperature protection | |
| CN204086510U (en) | Demagnetization detection control module and demagnetization detection system | |
| CN203759164U (en) | Circuit for detecting access state of USB load equipment | |
| CN214795129U (en) | Battery voltage detection circuit | |
| CN108957100A (en) | A kind of current detection means | |
| CN209877285U (en) | Circuit for judging running state of compressor | |
| CN207265995U (en) | It is a kind of to use the key switch electromechanics road with ena-bung function linear voltage regulator | |
| CN209486164U (en) | Microcontroller power supply low-voltage detection circuit without A D interface and internal reference voltage | |
| CN212622790U (en) | Undervoltage detection circuit | |
| CN213069107U (en) | Current acquisition circuit and power battery based on single current sensor | |
| CN206710558U (en) | High voltage connector state micro-current injection detection circuit and detecting system | |
| CN108512399A (en) | A kind of enabled control circuit for Switching Power Supply | |
| CN109709373A (en) | A kind of signal adaptive Acquisition Circuit and acquisition method | |
| CN104597316A (en) | Weak current detecting device and method | |
| CN215681904U (en) | Power supply switching circuit and medical equipment | |
| CN203324355U (en) | Microwave-system diverse self-checking circuit | |
| CN211426729U (en) | Fire detection alarm electric quantity detection circuit and fire detection alarm | |
| CN207195262U (en) | A kind of cell management system of electric automobile fan drive circuit | |
| CN206490464U (en) | Portable power source charging device | |
| CN207896706U (en) | Farad capacitor charging circuit and electronic equipment | |
| CN209525430U (en) | For monitoring the circuit of vehicle battery voltage | |
| CN206639016U (en) | For automobile instrument water temperature fuel sensor sample circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |