CN115047229A - A high accuracy current sampling module for new energy automobile - Google Patents
A high accuracy current sampling module for new energy automobile Download PDFInfo
- Publication number
- CN115047229A CN115047229A CN202210277772.4A CN202210277772A CN115047229A CN 115047229 A CN115047229 A CN 115047229A CN 202210277772 A CN202210277772 A CN 202210277772A CN 115047229 A CN115047229 A CN 115047229A
- Authority
- CN
- China
- Prior art keywords
- sampling
- current
- data
- processing
- processing unit
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a high-precision current sampling module for a new energy automobile, which comprises a first sampling unit, a processing unit and a second sampling unit, wherein the first sampling unit is used for carrying out contact type first current sampling processing so as to obtain first current sampling data and transmitting the first current sampling data to a first interface of the processing unit, and the processing unit is used for carrying out first processing on the first current sampling data so as to output the first current data. The invention discloses a high-precision current sampling module for a new energy automobile, which respectively performs current sampling through a first sampling unit and a second sampling unit and transmits detected data to a processing unit, so that the obtained first current data and the obtained second current data are respectively transmitted to an upper computer for processing, and further high-precision current data are obtained.
Description
Technical Field
The invention belongs to the technical field of current sampling of new energy automobiles, and particularly relates to a high-precision current sampling module for a new energy automobile.
Background
With the development and popularization of new energy automobile technology, people increasingly demand the management of electrical energy inside new energy automobiles, and the demand is concentrated on the demand of direct current sensing precision of components such as a Battery Management System (BMS), an Inverter (INV) and the like. The charging and discharging characteristics of the battery as the energy storage equipment of the electric vehicle are very key indexes, and in the charging and discharging process of the battery, a BMS (battery management system) system needs to collect the terminal voltage and temperature of each battery in a power battery pack of the electric vehicle, the charging and discharging current and the total voltage of a battery pack in real time through a current sensor so as to prevent the battery from being overcharged or overdischarged.
The current new energy automobile current sensor technology mainly comprises a Hall type current sensor and a shunt type current sensor. However, the existing detection adopts either hall-type current detection or shunt-type detection, if the detection branch fails, the current cannot be detected, and the single detection branch is easily interfered, so that the accuracy of current detection is affected.
Therefore, the above problems are further improved.
Disclosure of Invention
The invention mainly aims to provide a high-precision current sampling module for a new energy automobile, which respectively performs current sampling through a first sampling unit and a second sampling unit and transmits detected data to a processing unit, so that the obtained first current data and second current data are respectively transmitted to an upper computer for processing, and further high-precision current data are obtained.
In order to achieve the above object, the present invention provides a high-precision current sampling module for a new energy automobile, which is used for realizing high-precision sampling of a current of a detection component, and comprises a first sampling unit, a processing unit and a second sampling unit, wherein:
the first sampling unit carries out contact type first current sampling processing to obtain first current sampling data and transmits the first current sampling data to a first interface of the processing unit, and the processing unit carries out first processing on the first current sampling data so as to output the first current data;
the second sampling unit carries out non-contact second current sampling processing to obtain second current sampling data and transmits the second current sampling data to a second interface of the processing unit, and the processing unit carries out second processing on the second current sampling data so as to output the second current data;
the processing module transmits the first current data and the second current data to the upper computer, so that the upper computer compares the first current data and the second current data and obtains (high-precision) third current data after third processing (preferably weighting calculation).
As a further preferable technical solution of the above technical solution, the first sampling unit includes a sampling chip and a sampling resistor connected to the detection component, the sampling chip is provided with a first temperature-sensitive resistor, wherein:
the sampling resistor is provided with a plurality of voltage sampling points, the input end of the sampling chip is connected to the voltage sampling points, so that the voltage value of the sampling resistor is obtained, the output end of the sampling chip transmits the voltage value to the processing unit, the processing unit performs first processing on the voltage value, and first current data is output.
As a further preferable technical solution of the above technical solution, the first processing of the processing unit is specifically implemented as:
the first sampling unit is connected in series in a test loop of a test platform (connected with an upper computer so as to set the temperature tediousness and the test duration of the test), the test platform selects a plurality of current test points according to the range of a current sampling module so as to provide an accurate current value in the test loop and maintain the preset time so as to keep the measured current and temperature stable, the sampling chip transmits a voltage value obtained by sampling and the current resistance value of the first temperature sensing resistor (after analog-to-digital conversion) to the processing unit, the processing unit receives the reference voltage of each chip from the power supply unit (and the chip temperature obtained by the detection of the temperature sensing resistor of the processing unit), and the processing carries out compensation calculation on the received input parameters so as to obtain the resistance value of the compensated sampling resistor, the resistance value of the first temperature sensing resistor and the measured current value (first current data), wherein:
the compensation parameters for the compensation calculation are obtained as: after the data of the plurality of current test points are obtained, the processing unit performs regression calculation on the input and output parameters so as to obtain compensation parameters.
As a further preferable technical solution of the above technical solution, the second sampling unit includes a hall sensor and an analog-to-digital converter, wherein:
the Hall sensor carries out non-contact magnetic circuit linear detection on the detection component so as to obtain second current sampling data, the second current sampling data are transmitted to the processing unit after analog-to-digital conversion, and the processing unit compensates the second current data according to the temperature parameters so as to output the second current data.
As a further preferable technical solution of the above technical solution, the high-precision current sampling module for a new energy automobile further includes a communication unit (preferably CAN communication), and the communication unit transmits the obtained first current data and second current data to an upper computer.
As a further preferable technical solution of the above technical solution, if the upper computer receives only the first current data transmitted from the communication unit, the first current data is output as third current data, and if the upper computer receives only the second current data transmitted from the communication unit, the second current data is output as third current data.
Drawings
Fig. 1 is a schematic structural diagram of a high-precision current sampling module for a new energy automobile according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
In the preferred embodiment of the present invention, those skilled in the art should note that the new energy automobile and the detection part, etc. related to the present invention can be regarded as the prior art.
Preferred embodiments.
The invention discloses a high-precision current sampling module for a new energy automobile, which is used for realizing high-precision sampling of current of a detection component, and comprises a first sampling unit, a processing unit and a second sampling unit, wherein:
the first sampling unit carries out contact type first current sampling processing to obtain first current sampling data and transmits the first current sampling data to a first interface of the processing unit, and the processing unit carries out first processing on the first current sampling data so as to output the first current data;
the second sampling unit carries out non-contact second current sampling processing to obtain second current sampling data and transmits the second current sampling data to a second interface of the processing unit, and the processing unit carries out second processing on the second current sampling data so as to output the second current data;
the processing module transmits the first current data and the second current data to the upper computer, so that the upper computer compares the first current data and the second current data and obtains (high-precision) third current data after third processing (preferably weighting calculation).
Specifically, first sampling unit includes sampling chip and connects in the sampling resistor of detection part, the sampling chip is equipped with a temperature sensing resistor, wherein:
the sampling resistor is provided with a plurality of voltage sampling points, the input end of the sampling chip is connected to the voltage sampling points, so that the voltage value of the sampling resistor is obtained, the output end of the sampling chip transmits the voltage value to the processing unit, the processing unit performs first processing on the voltage value, and first current data are output.
More specifically, the first sampling unit includes a sampling chip and a sampling resistor connected to the detection component, the sampling chip is provided with a first temperature-sensing resistor, wherein:
the sampling resistor is provided with a plurality of voltage sampling points, the input end of the sampling chip is connected to the voltage sampling points, so that the voltage value of the sampling resistor is obtained, the output end of the sampling chip transmits the voltage value to the processing unit, the processing unit performs first processing on the voltage value, and first current data are output.
Further, the second sampling unit includes a hall sensor and an analog-to-digital converter, wherein:
the Hall sensor carries out non-contact magnetic circuit linear detection on the detection component so as to obtain second current sampling data, the second current sampling data are transmitted to the processing unit after analog-to-digital conversion, and the processing unit compensates the second current data according to the temperature parameters so as to output the second current data.
Still further, the high-precision current sampling module for the new energy automobile further comprises a communication unit (preferably, CAN communication), and the communication unit transmits the obtained first current data and second current data to the upper computer.
It should be noted that if the upper computer receives only the first current data transmitted from the communication unit, the first current data is output as the third current data, and if the upper computer receives only the second current data transmitted from the communication unit, the second current data is output as the third current data.
It should be noted that the technical features of the new energy vehicle, the detection component, and the like related to the present patent application should be regarded as the prior art, and the specific structure, the operation principle, the control mode and the spatial arrangement mode of the technical features may be conventional choices in the field, and should not be regarded as the invention point of the present patent, and the present patent is not further specifically described in detail.
It will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a high accuracy current sampling module for new energy automobile for realize sampling the electric current high accuracy of detecting part, its characterized in that includes first sampling unit, processing unit and second sampling unit, wherein:
the first sampling unit carries out contact type first current sampling processing to obtain first current sampling data and transmits the first current sampling data to a first interface of the processing unit, and the processing unit carries out first processing on the first current sampling data so as to output the first current data;
the second sampling unit carries out non-contact second current sampling processing to obtain second current sampling data and transmits the second current sampling data to a second interface of the processing unit, and the processing unit carries out second processing on the second current sampling data so as to output the second current data;
the processing module transmits the first current data and the second current data to the upper computer, so that the upper computer compares the first current data with the second current data and obtains third current data after third processing.
2. The high-precision current sampling module for the new energy automobile is characterized in that the first sampling unit comprises a sampling chip and a sampling resistor connected to a detection component, the sampling chip is provided with a first temperature-sensing resistor, and the first temperature-sensing resistor comprises:
the sampling resistor is provided with a plurality of voltage sampling points, the input end of the sampling chip is connected to the voltage sampling points, so that the voltage value of the sampling resistor is obtained, the output end of the sampling chip transmits the voltage value to the processing unit, the processing unit performs first processing on the voltage value, and first current data is output.
3. The high-precision current sampling module for the new energy automobile according to claim 2, wherein the first processing of the processing unit is specifically implemented as:
the first sampling unit is connected in series in a test loop of the test platform, the test platform selects a plurality of current test points according to the range so as to provide an accurate current value in the test loop, and maintain the preset time to keep the measured current and temperature stable, the sampling chip transmits a voltage value obtained by sampling and the current resistance value of the first temperature sensing resistor to the processing unit, the processing unit receives the reference voltage from the power supply unit at the same time, and the processing carries out compensation calculation on the received input parameters so as to obtain the compensated resistance value of the sampling resistor, the resistance value of the first temperature sensing resistor and the measured current value, wherein:
the compensation parameters for the compensation calculation are obtained as: after the data of the plurality of current test points are obtained, the processing unit performs regression calculation on the input and output parameters so as to obtain compensation parameters.
4. The high-precision current sampling module for the new energy automobile according to claim 3, wherein the second sampling unit comprises a Hall sensor and an analog-to-digital converter, wherein:
the Hall sensor carries out non-contact magnetic circuit linear detection on the detection component so as to obtain second current sampling data, the second current sampling data are transmitted to the processing unit after analog-to-digital conversion, and the processing unit compensates the second current data according to the temperature parameters so as to output the second current data.
5. The high-precision current sampling module for the new energy automobile is characterized in that the high-precision current sampling module for the new energy automobile further comprises a communication unit, and the communication unit transmits the obtained first current data and second current data to an upper computer.
6. The high-precision current sampling module for the new energy automobile according to claim 5, wherein if the upper computer receives only the first current data transmitted from the communication unit, the first current data is output as third current data, and if the upper computer receives only the second current data transmitted from the communication unit, the second current data is output as third current data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210277772.4A CN115047229A (en) | 2022-03-16 | 2022-03-16 | A high accuracy current sampling module for new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210277772.4A CN115047229A (en) | 2022-03-16 | 2022-03-16 | A high accuracy current sampling module for new energy automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115047229A true CN115047229A (en) | 2022-09-13 |
Family
ID=83158354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210277772.4A Pending CN115047229A (en) | 2022-03-16 | 2022-03-16 | A high accuracy current sampling module for new energy automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115047229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963429A (en) * | 2023-03-16 | 2023-04-14 | 山东云开电力有限公司 | Electric leakage detection device for power switch cabinet |
-
2022
- 2022-03-16 CN CN202210277772.4A patent/CN115047229A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115963429A (en) * | 2023-03-16 | 2023-04-14 | 山东云开电力有限公司 | Electric leakage detection device for power switch cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3480605B1 (en) | Current detection system, method and device | |
| Huang et al. | An online battery impedance measurement method using DC–DC power converter control | |
| Schweighofer et al. | Modeling of high power automotive batteries by the use of an automated test system | |
| CN109720235B (en) | Insulation detection system based on full-bridge insulation detection circuit and electric automobile | |
| CN105807230A (en) | Storage battery residual capacity and health state rapid detection method and device | |
| CN210051820U (en) | Insulation detection device and battery management system | |
| CN102200568A (en) | Method of estimating remaining capacity and run-time of a battery device | |
| CN111650525B (en) | Battery management system with battery impedance measurement and impedance measurement method thereof | |
| CN103901345A (en) | Storage battery electric quantity detection apparatus and method | |
| CN103026245A (en) | Voltage measuring circuit and method | |
| CN111913113A (en) | Method and device for identifying short circuit in electric core, storage medium and electronic equipment | |
| CN115047229A (en) | A high accuracy current sampling module for new energy automobile | |
| CN110554328B (en) | HHT-based storage battery internal resistance measurement method and system | |
| CN113330288B (en) | Temperature measuring device, battery device including the same, and temperature measuring method | |
| Qahtan et al. | IoT-based electrical vehicle’s energy management and monitoring system | |
| CN116027207A (en) | Battery electric quantity detection circuit, electronic equipment and electric quantity metering method | |
| Hao et al. | A power management IC used for protection system of Li-ion battery packs | |
| CN212749184U (en) | Current detection device and current detection system of battery pack | |
| CN109901078B (en) | Internal resistance and temperature measuring circuit for single storage battery | |
| Li et al. | Digital battery management unit with built-in resistance compensation, modulated frequency detection and multi-mode protection for fast, efficient and safe charging | |
| CN111751747A (en) | Battery capacity measuring system and measuring method | |
| CN216792407U (en) | High-precision capacity detection circuit for lithium battery | |
| CN220137263U (en) | Isolated shunt signal sampling circuit | |
| CN115144773B (en) | Voltage measurement system and method for battery pack | |
| Hao et al. | A Power Management IC Used for Monitoring and Protection of Li‐Ion Battery Packs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |