阅读说明：本技术 一种互证高安全性采集电路及其运行方法 (Mutual-authentication high-safety acquisition circuit and operation method thereof ) 是由 曾飞熊 周群佩 于 2020-07-28 设计创作，主要内容包括：本专利公开了一种互证高安全性采集电路及其运行方法,包括第一基准和第二基准、用于采集电压信号的采集芯片、以及用于发送控制信号的MCU；所述采集芯片包括Verf、AD1、AD 2至AD n,所述Verf连接所述第一基准,所述AD1连接所述第二基准,所述AD 2至AD n连接目标设备；所述采集芯片与所述MCU相连接。通过本技术实现采集电路的安全运行。(The patent discloses a mutual-authentication high-safety acquisition circuit and an operation method thereof, wherein the mutual-authentication high-safety acquisition circuit comprises a first reference, a second reference, an acquisition chip for acquiring voltage signals and an MCU for transmitting control signals; the acquisition chip comprises a Verf, an AD1 and AD 2-AD n, the Verf is connected with the first benchmark, the AD1 is connected with the second benchmark, and the AD 2-AD n are connected with target equipment; the acquisition chip is connected with the MCU. The safe operation of the acquisition circuit is realized through the technology.)

1. The utility model provides a mutual high security acquisition circuit which characterized in that: the device comprises a first reference, a second reference, an acquisition chip for acquiring voltage signals and an MCU for sending control signals; the acquisition chip comprises a Verf, an AD1 and AD 2-AD n, the Verf is connected with the first benchmark, the AD1 is connected with the second benchmark, and the AD 2-AD n are connected with target equipment; the acquisition chip is connected with the MCU.

2. The method of claim 1, comprising the steps of:

step 1: connecting the Verf of the acquisition chip to a first benchmark, connecting the AD1 to the second benchmark, and connecting the AD 2-AD n to the target equipment;

step 2: the AD1 of the acquisition chip acquires a reference voltage of the second reference;

and step 3: comparing and analyzing the measurement result of the reference voltage of the second reference voltage in the step 2 with the rated reference voltage of the second reference through the MCU, and judging whether the measurement result is within the error allowable range; if the error is beyond the allowable range, the circuit is proved to be abnormal, and step 5 is executed; if the error is within the allowable range, the circuit is proved to be normal, and step 4 is executed;

and 4, step 4: the AD2 to AD n of the acquisition chip acquire analog signals of the target equipment, and the circuit operates normally;

and 5: and the MCU sends an alarm signal.

Technical Field

The patent relates to the technical field of acquisition circuits, in particular to a mutual-authentication high-safety acquisition circuit and an operation method thereof.

Background

In recent years, with the development of new energy automobiles, the power lithium battery industry is also in the process of flying development, but the fire event of the lithium battery is a sword which always hangs on the lithium battery industry, such as sticking in the throat. The reasons for this are two, namely, the quality of the lithium battery pack itself and the failure of the lithium Battery Management System (BMS). And the faults of the lithium Battery Management System (BMS) are divided into acquisition faults and system crash operation abnormity. The collection fault mainly represents that the internal electric quantity of the lithium battery cannot be accurately identified by a collection circuit aiming at the lithium battery in a lithium Battery Management System (BMS), so that the charging connection cannot be disconnected in time, and the lithium battery is overloaded during charging to cause fire accidents.

Therefore, a high-safety acquisition circuit is needed to ensure the safe operation of the acquisition circuit such as a lithium battery management system.

Content of patent

The purpose of this patent is to design mutual high security acquisition circuit and operation method thereof, makes it realize the safe operation of acquisition circuit.

In order to achieve the purpose, the patent provides the following technical scheme:

a mutual-authentication high-security acquisition circuit comprises a first reference, a second reference, an acquisition chip for acquiring voltage signals and an MCU (single chip microcomputer) for sending control signals; the acquisition chip comprises a Verf (reference pin), an AD1 (first acquisition pin), an AD2 (second acquisition pin) to an ADn (nth acquisition pin), wherein n is a natural number greater than 2, the Verf is connected with the first benchmark, the AD1 is connected with the second benchmark, and the AD2 to the ADn are connected with target equipment; the acquisition chip is connected with the MCU.

This patent still provides following technical scheme:

an operation method of a mutual authentication high-safety acquisition circuit comprises the following steps:

step 1: connecting the Verf of the acquisition chip to a first benchmark, connecting the AD1 to the second benchmark, and connecting the AD2 to ADn to the target equipment;

step 2: the AD1 of the acquisition chip acquires a reference voltage of the second reference;

and step 3: comparing and analyzing the measurement result of the reference voltage of the second reference voltage in the step 2 with the rated reference voltage of the second reference through the MCU, and judging whether the measurement result is within the error allowable range; the allowable error range may be set to ± 2V or ± 10V or more by manual operation according to actual system conditions, so the present application is not limited. If the error is beyond the allowable range, the circuit is proved to be abnormal, and step 5 is executed; if the error is within the allowable range, the circuit is proved to be normal, and step 4 is executed;

and 4, step 4: the AD 2-ADn of the acquisition chip acquires the analog signal of the target equipment, and the circuit operates normally;

and 5: and the MCU sends an alarm signal.

Compared with the prior art, the beneficial effect of this patent:

detecting a reference voltage of a second reference and comparing the reference voltage with a rated reference voltage of the reference through the MCU to see whether the reference voltage is within an error allowable range; if the error tolerance range is exceeded, the circuit is proved to be abnormal, the MCU sends out an alarm signal to remind a user of paying attention, or the power supply of the target equipment is cut off by operating a cutter of the target equipment. If the error is within the allowable range, the circuit is proved to be normal, the AD 2-ADn collect the analog signals of the target equipment, and the circuit system operates the analog signals normally.

Drawings

In order to more clearly illustrate the embodiments of the present patent or the technical solutions in the prior art, the drawings needed to be 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 patent, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic block diagram of the circuit of this patent;

Detailed Description

The technical solutions in this patent will be described clearly and completely with reference to the accompanying drawings in this patent, and obviously, only some embodiments, not all embodiments, of this patent are described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.

Example (b):

a mutual-authentication high-security acquisition circuit comprises a first reference, a second reference, an acquisition chip for acquiring voltage signals and an MCU (single chip microcomputer) for sending control signals; the acquisition chip comprises a Verf (reference pin), an AD1 (first acquisition pin), an AD2 (second acquisition pin) to an ADn (nth acquisition pin), wherein n is a natural number greater than 2, the Verf is connected with the first benchmark, the AD1 is connected with the second benchmark, and the AD2 to the ADn are connected with target equipment; the acquisition chip is connected with the MCU.

The working principle of the embodiment is as follows:

step 1: connecting the Verf of the acquisition chip to a first benchmark, connecting the AD1 to the second benchmark, and connecting the AD2 to ADn to the target equipment;

step 2: the AD1 of the acquisition chip acquires a reference voltage of the second reference;

and step 3: comparing and analyzing the measurement result of the reference voltage of the second reference voltage in the step 2 with the rated reference voltage of the second reference through the MCU, and judging whether the measurement result is within the error allowable range; the allowable error range may be set to ± 2V or ± 10V or more by manual operation according to actual system conditions, so the present application is not limited. If the error is beyond the allowable range, the circuit is proved to be abnormal, and step 5 is executed; if the error is within the allowable range, the circuit is proved to be normal, and step 4 is executed;

and 4, step 4: the AD 2-ADn of the acquisition chip acquires the analog signal of the target equipment, and the circuit operates normally;

and 5: and the MCU sends an alarm signal.