CN219224925U

CN219224925U - Chip voltage precision detection device

Info

Publication number: CN219224925U
Application number: CN202223550549.7U
Authority: CN
Inventors: 周哲
Original assignee: Xiaogan Chuneng New Energy Innovation Technology Co ltd
Current assignee: Xiaogan Chuneng New Energy Innovation Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-20
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a chip voltage precision detection device which comprises a resistor mechanism, wherein the resistor mechanism is connected with a programmable direct current power supply, the resistor mechanism and the programmable direct current power supply are connected with an AFE sampling chip of a BMS slave machine through a can bus, the AFE sampling chip of the BMS slave machine is connected with a can card through the can bus, and an output port of the can card is connected with an upper computer data acquisition mechanism through the can bus. The utility model has scientific and reasonable structural design, and can effectively reduce the cost by welding a plurality of resistor monomers on the PCB to form the resistor mechanism, and is matched with a programmable direct current power supply, and meanwhile, the programmable direct current power supply, the BMS slave AFE sampling chip, the Zhou Ligong can card and the upper computer data acquisition mechanism are connected into the can bus, so that the voltage of each resistor monomer can be rapidly detected, the voltage precision can be rapidly detected, the detection speed can be improved, and the detection error can be reduced.

Description

Chip voltage precision detection device

Technical Field

The utility model relates to the technical field of voltage precision detection equipment, in particular to a chip voltage precision detection device.

Background

At present, the detection of the voltage precision of the AFE chip of the BMS slave machine utilizes a real battery cell, a sampling terminal is welded on the battery cell, then the real voltage of the battery cell is collected by utilizing a high-precision universal meter, and the real voltage collected by the high-precision universal meter is compared with the voltage collected by the BMS slave machine so as to measure the voltage precision of the AFE chip single body of the slave machine.

Because the existing detection technology is a real battery cell, the sampling terminal is welded to the battery cell to collect the battery cell voltage, the method can be carried out when the collected voltage is few, and if hundreds of voltages or more are collected, the cost and the field are very great, and the detection efficiency is low.

Disclosure of Invention

The utility model aims to provide a chip voltage precision detection device for solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a chip voltage precision detection device, includes resistance mechanism, resistance mechanism includes N equivalent resistance monomer, resistance mechanism is connected with programmable DC power supply, resistance mechanism and programmable DC power supply pass through can bus and BMS slave machine AFE sampling chip and are connected, BMS slave machine AFE sampling chip passes through can bus connection can card, the output port of can card passes through can bus connection host computer data acquisition mechanism.

Further, the resistance mechanism is welded on the PCB.

Further, the anode and the cathode of the PCB are respectively connected with a programmable direct current power supply through voltage acquisition lines.

Further, the number of resistive monomers N >3.

Further, N resistor monomers are connected in series through wires.

Further, the programmable direct current power supply comprises an input power grid filter, an input rectifying filter, a converter, an output rectifying filter, a control circuit and a protection circuit.

Further, a switch is installed on the voltage acquisition line.

Compared with the prior art, the utility model has the beneficial effects that:

the chip voltage precision detection device provided by the utility model has the advantages that the structural design is simple and reasonable, the practicability is high, the resistance mechanism is formed by welding a plurality of resistance monomers on the PCB, the real battery core is replaced, the cost can be effectively reduced, the resistance mechanism is matched with a programmable direct current power supply, the BMS slave machine AFE sampling chip, the Zhou Ligong can card and the upper computer data acquisition mechanism are simultaneously connected into a can bus, and the voltage of each resistance monomer can be rapidly detected, so that the voltage precision can be rapidly detected, the detection speed can be improved, and the detection error can be reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic diagram of a series circuit structure according to the present utility model.

In the figure: 1-resistance mechanism, 2-programmable DC power supply, 3-BMS slave machine AFE sampling chip, 4-can card, 5-host computer data acquisition mechanism, 6-can bus, 7-voltage acquisition line, 8-switch, 9 resistance monomer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the present utility model provides a technical solution: the utility model provides a chip voltage precision detection device, includes resistance mechanism 1, and resistance mechanism 1 includes N equivalent resistance monomer 9, and resistance mechanism 1 is connected with programmable DC power supply 2, and resistance mechanism 1 and programmable DC power supply 2 pass through can bus 6 and are connected with BMS slave machine AFE sampling chip 3, and BMS slave machine AFE sampling chip 3 passes through can bus 6 and connects can card 4, and can card 4's output port passes through can bus 6 and connects host computer data acquisition mechanism 5. The programmable direct current power supply 2 is connected with the resistor mechanism 1 to replace a real battery cell, a worker can obtain voltage data of the resistor unit 9 through the voltage data of the programmable direct current power supply 2, collect voltage signals of the resistor unit 9 through the BMS slave AFE sampling chip 3, collect voltage data through the peripheral work can card 4, collect and display the voltage data through the upper computer data collection mechanism 5, and the worker can compare the data with the calculated voltage data of the resistor mechanism 1 to detect the accuracy of the BMS slave AFE sampling chip 3.

Furthermore, the resistor mechanism 1 is welded on the PCB, and the resistor mechanism 1 is formed by welding a plurality of resistor monomers 9 on the PCB in series, so that the cost can be effectively reduced.

Further, the positive electrode and the negative electrode of the PCB are respectively connected with the programmable direct current power supply 2 through the voltage acquisition line 7.

Further, the number N >3 of resistive monomers 9.

Further, the N resistor units 9 are connected in series through wires in a form of sequentially connecting the resistor units end to end, when the total voltage provided by the programmable dc power supply 2 is constant, the voltage of each equivalent resistor unit 9 is also constant, and the value of each voltage can be calculated by u1=u2= … un=u total/N.

Further, the programmable direct current power supply 2 mainly comprises an input power grid filter, an input rectifying filter, a converter, an output rectifying filter, a control circuit, a protection circuit and the like, has the characteristics of load self-adaption, convenient operation, small size, light weight and the like, has a certain protection function, specifically, can select an AFG1000 series model programmable direct current power supply, adjusts output voltage and output frequency through a knob on an operation panel, has high accuracy, is simple and convenient to operate, can avoid power failure caused by CPU faults, and has the advantages of high precision load and frequency stability and high dynamic response speed. The method solves the defect that the early power supply cannot freely adjust the voltage, can conveniently select the preset voltage value of input and output, and has higher precision and stability. It can also be programmed to provide programmable monitoring such as voltage drop, interruption and waveform modeling. The programmable power supply may also be considered a low frequency signal generator of the power supply type. The output voltage and output current of the power supply can be arbitrarily set. All functions are realized by connecting the panel keyboard or the RS-232C serial port with the upper computer, so that the working efficiency is improved.

Further, a switch 8 is installed on the voltage acquisition line 7, and the line on-off of the voltage acquisition line 7 is controlled through the switch 8.

Furthermore, the CAN card 4 is a Zhou Ligong CAN card, and the Zhou Ligong CAN card CAN be used for detection and diagnosis of a new energy CAN-BUS system, has the advantages of small size, portability, plug and play and the like, CAN be used for daily use including CAN data interception, CAN line analysis, a brushing program and the like, and CAN be generally matched with CANtest software.

Working principle:

this kind of BMS slave machine AFE chip monomer voltage precision detection device establishes ties through a plurality of equivalent resistance monomer 9 and constitutes resistance mechanism 1, and programmable DC power supply 2 provides total voltage for the device, and BMS slave machine AFE sampling chip 3 can gather corresponding voltage signal, and Zhou Ligong can card 4 inserts can the bus, inserts host computer data acquisition mechanism 5 simultaneously, through the partial pressure law of establishing ties of circuit: when the total voltage provided by the programmable direct current power supply 2 is certain, the voltage of each equivalent resistance unit 9 minutes is also certain, the value of each voltage can be calculated through u1=u2= … Un=utotal/n, then corresponding voltage signals are acquired through the BMS slave computer AFE sampling chip 3, data are acquired through the peripheral power can card 4, the voltage data are acquired through the upper computer data acquisition mechanism 5 and displayed, and compared with the calculated voltage data, so that the voltage accuracy is detected, and the detection efficiency is improved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a chip voltage precision detection device which characterized in that: including resistance mechanism (1), resistance mechanism (1) include N equivalent resistance monomer (9), resistance mechanism (1) are connected with programmable direct current power supply (2), resistance mechanism (1) and programmable direct current power supply (2) are connected with BMS slave machine AFE sampling chip (3) through can bus (6), BMS slave machine AFE sampling chip (3) are connected can card (4) through can bus (6), the output port of can card (4) is connected host computer data acquisition mechanism (5) through can bus (6).

2. The device for detecting voltage accuracy of a chip according to claim 1, wherein: the resistor mechanism (1) is welded on the PCB.

3. The device for detecting voltage accuracy of a chip according to claim 2, wherein: the positive electrode and the negative electrode of the PCB are respectively connected with a programmable direct current power supply (2) through a voltage acquisition line (7).

4. The device for detecting voltage accuracy of a chip according to claim 1, wherein: the number N of the resistor monomers (9) is >3.

5. The device for detecting voltage accuracy of a chip according to claim 4, wherein: n resistance monomers (9) are connected in series through wires.

6. The device for detecting voltage accuracy of a chip according to claim 1, wherein: the programmable direct current power supply (2) comprises an input power grid filter, an input rectifying filter, a converter, an output rectifying filter, a control circuit and a protection circuit.

7. A chip voltage accuracy detecting apparatus according to claim 3, wherein: and a switch (8) is arranged on the voltage acquisition line (7).