WO2015161822A1 - Busbar voltage measurement method and circuit - Google Patents

Busbar voltage measurement method and circuit Download PDF

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Publication number
WO2015161822A1
WO2015161822A1 PCT/CN2015/077349 CN2015077349W WO2015161822A1 WO 2015161822 A1 WO2015161822 A1 WO 2015161822A1 CN 2015077349 W CN2015077349 W CN 2015077349W WO 2015161822 A1 WO2015161822 A1 WO 2015161822A1
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Prior art keywords
busbar
voltage
detecting circuit
circuit
battery
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PCT/CN2015/077349
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French (fr)
Chinese (zh)
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朱科
张鹏
马东海
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华为技术有限公司
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Publication of WO2015161822A1 publication Critical patent/WO2015161822A1/en

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    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

Definitions

  • Embodiments of the present invention relate to the field of circuits, and in particular, to a busbar voltage detection method and circuit.
  • a battery In a power management system, a battery is usually used as a backup device. To ensure and extend the life of the battery, the battery needs to be intelligently managed. In the process of managing the battery, it is necessary to check some parameters of the battery circuit during the application process, such as: bus voltage, battery voltage, battery current detection, battery fuse detection, and the like.
  • FIG. 1 is a schematic diagram of a conventional busbar voltage detection circuit.
  • the detection circuit includes a battery circuit 11, a differential detection circuit 12, and a conversion circuit 13.
  • the battery circuit 11 is a circuit composed of a battery, a contactor, a shunt, an open switch, a relay, a diode, etc.
  • the detection of the bus voltage mainly depends on the positive bus of the bus circuit +48V.
  • the end is connected to the non-inverting terminal of the operational amplifier circuit, and passes through the conversion circuit 11 at the negative terminal -48V end of the bus circuit of the battery circuit to form a differential detecting circuit 12, and the differential detecting circuit 12 and the converting circuit 13 are on the same single board.
  • the detection of the busbar voltage of the battery circuit is achieved by the single board.
  • the switching circuit 13 in the prior art and the negative terminal -48 end of the busbar of the battery circuit need to be connected by a line, and the current passing through the line causes a voltage difference, and when the AC power is cut off, the contactor is disconnected after the backup battery is activated, and the differential detection is performed.
  • the analog ground (AGND) in the circuit loses the reference point, which will result in the accuracy of the busbar voltage detection result.
  • Embodiments of the present invention provide a method and a circuit for detecting a busbar voltage by calculating a first voltage and a second voltage of a busbar positive pole detecting circuit and a busbar negative pole detecting circuit with a first voltage dividing ratio and a second voltage dividing ratio
  • the busbar voltage is obtained, which solves the problem of voltage difference caused by the connection of the single board in the prior art, and improves the accuracy of the voltage detection of the busbar.
  • a first aspect of the present invention provides a busbar voltage detecting circuit, including:
  • a first end of the busbar positive pole detecting circuit is connected to a positive pole of the bus circuit of the battery circuit, and a second end of the busbar positive pole detecting circuit is common to a reference ground in the battery circuit, and the busbar positive pole
  • the voltage dividing ratio of the detecting circuit is the first voltage dividing ratio
  • a first end of the busbar negative pole detecting circuit is connected to a busbar negative pole of the battery circuit, and a second end of the busbar negative pole detecting circuit is common to the reference ground in the battery circuit, the mother
  • the partial pressure ratio of the negative electrode detecting circuit is the second partial pressure ratio.
  • the busbar positive polarity detecting circuit includes at least one voltage dividing resistor; and the busbar negative electrode detecting circuit includes at least one voltage dividing resistor.
  • the busbar positive polarity detecting circuit includes two or more voltage dividing resistors, and the two Or two or more voltage dividing resistors are connected in series and/or in parallel;
  • the busbar negative pole detecting circuit includes two or more voltage dividing resistors, and the two or more voltage dividing resistors are connected in series and/or in parallel.
  • a second aspect of the present invention provides a method for detecting a busbar voltage detecting circuit, including:
  • the busbar positive detecting circuit The first end of the bus circuit is connected to the positive electrode of the bus circuit, the second end of the bus bar positive detecting circuit is common to the reference ground in the battery circuit, and the first end of the bus bar negative detecting circuit is a busbar negative pole of the battery circuit is connected, a second end of the busbar negative pole detecting circuit is co-located with the reference ground in the battery circuit;
  • the first voltage dividing ratio according to the first voltage, the second voltage, the busbar positive pole detecting circuit, and the The second voltage dividing ratio of the busbar negative detecting circuit, before acquiring the busbar voltage further includes:
  • the detecting, according to the first voltage, the second voltage, the busbar positive pole a first voltage dividing ratio of the circuit and a second voltage dividing ratio of the busbar negative detecting circuit to obtain a busbar voltage including:
  • the busbar voltage detecting method and circuit connect the busbar positive pole detecting circuit in the busbar positive pole of the battery circuit, and connect the busbar negative pole detecting circuit in the busbar anode of the battery circuit to respectively measure the busbar positive pole detecting circuit.
  • the second end and the second end of the busbar negative detecting circuit are opposite to the first voltage and the second voltage of the reference point, and according to the first voltage, the second voltage, the first voltage dividing ratio of the busbar positive detecting circuit, and
  • the second voltage dividing ratio of the busbar negative detecting circuit is calculated to obtain the busbar voltage, which solves the problem of the voltage difference caused by the single board connection in the prior art, and improves the accuracy of the busbar voltage detection.
  • Figure 1 is a schematic diagram of a conventional busbar voltage detecting circuit
  • Embodiment 1 of a busbar voltage detecting circuit of the present invention
  • FIG. 3 is a schematic structural view of a third embodiment of a busbar voltage detecting circuit of the present invention.
  • Embodiment 4 is a flow chart of Embodiment 1 of a busbar voltage detecting method according to the present invention.
  • the busbar voltage detecting circuit includes a battery circuit 21, a busbar positive detecting circuit 22, and a busbar negative detecting circuit 23.
  • the first end 221 of the busbar positive pole detecting circuit 22 is connected to the busbar positive pole 211 of the battery circuit 21, the second end 222 of the busbar positive pole detecting circuit 22 and the reference ground 213 in the battery circuit 21.
  • the voltage dividing ratio of the busbar positive electrode detecting circuit 22 is the first voltage dividing ratio.
  • the first end 231 of the busbar negative electrode detecting circuit 23 is connected to the busbar negative electrode 213 of the battery circuit 21, and the second end 232 of the busbar negative electrode detecting circuit 23 and the reference in the battery circuit 21
  • the ground 213 is connected or connected in common, and the partial pressure ratio of the busbar negative electrode detecting circuit 23 is a second voltage dividing ratio.
  • the busbar positive electrode detecting circuit 22 and the busbar negative electrode detecting circuit 23 are voltage dividing circuits externally connected to the busbar positive electrode 211 and the busbar negative electrode 212 of the battery circuit 21 for voltages across the battery circuit 21.
  • the partial pressure may be composed of any voltage dividing element, and the parameters of the specific component may be adjusted according to actual conditions.
  • the first voltage dividing ratio of the busbar positive detecting circuit 22 and the second voltage dividing ratio of the busbar negative detecting circuit 23 must be Before connecting the detecting circuit, it is determined that the first partial pressure ratio and the second partial pressure ratio may be the same or different. The manner in which the partial pressure is determined is not limited by the present invention.
  • the busbar positive pole detecting circuit 22 and the busbar negative pole detecting circuit 23 can be connected at corresponding positions according to the requirements of the system to form a large closed loop of the system, and the detecting points are more flexible.
  • the busbar voltage detecting circuit connects the busbar positive pole detecting circuit to the busbar positive pole of the battery circuit, and connects the busbar negative pole detecting circuit to the busbar anode of the battery circuit, according to the first row of the busbar positive detecting circuit.
  • the voltage dividing ratio and the second voltage dividing ratio of the busbar negative detecting circuit acquire the busbar voltage, solve the problem of the voltage difference caused by the single board connection in the prior art, improve the accuracy of the busbar voltage detection, and make the battery circuit The detection is more flexible.
  • the busbar positive detecting circuit 22 includes at least one voltage dividing resistor
  • the busbar negative detecting circuit 23 Includes at least one voltage divider resistor.
  • the busbar positive pole detecting circuit 22 or the busbar negative pole detecting circuit 23 may be composed of a voltage dividing resistor.
  • the number of the voltage dividing resistors is not limited, and an appropriate resistance value and number may be selected according to actual conditions.
  • the busbar positive pole detecting circuit 22 includes two or more voltage dividing resistors, and the two or more voltage dividing resistors are connected in series and/or in parallel;
  • the busbar negative pole detecting circuit 23 includes two or more voltage dividing resistors, and the two or more voltage dividing resistors are connected in series and/or in parallel.
  • the busbar positive electrode detecting circuit 22 or the busbar negative electrode detecting circuit 23 is composed of a plurality of voltage dividing resistors
  • the plurality of voltage dividing resistors may be connected in series, in parallel, or in any series-parallel combination.
  • the following is an example to illustrate the structure and principle of the busbar circuit detection circuit:
  • FIG. 3 is a schematic structural view of a third embodiment of the bus voltage detecting circuit of the present invention.
  • the internal structure of the battery circuit of the present embodiment is not limited, and may be a battery, a contactor, a shunt, an open switch, a relay, a diode, etc.
  • the busbar circuit is also composed of power supply circuits in other power management systems.
  • the busbar positive electrode detecting circuit 22 in this embodiment is composed of voltage dividing resistors R12, R13, R14, R15, R16, and R17, wherein R12, R13, R14, and R15 are connected with R16 and R17 in parallel.
  • the resistance values of the voltage dividing resistors can be selected according to actual conditions.
  • the first end 221 of the busbar positive pole detecting circuit 22 is connected to the busbar positive pole 211 of the battery circuit 21, and the second end 222 is internal to the battery circuit 21.
  • Reference ground 213 is common or connected.
  • the busbar negative pole detecting circuit 23 is composed of voltage dividing resistors R18, R19, R20, R21, R22, and R23, wherein R18, R10, R20, and R21 are connected in series with R22 and R23 connected in parallel, and the resistance values of these voltage dividing resistors are sequentially connected. According to the actual situation, the first end 232 of the busbar negative electrode detecting circuit 22 is connected to the busbar negative electrode 212 of the battery circuit 21, and the second end 231 is shared with the reference ground 213 inside the battery circuit 21.
  • the busbar positive detecting circuit 22 Before connecting the busbar voltage detecting circuit, it is necessary to determine the first voltage dividing ratio and the second voltage dividing ratio of the busbar positive detecting circuit 22 and the busbar negative detecting circuit 23, and the busbar positive detecting circuit 22 can be connected to other In the power supply circuit, the voltage value after being divided by the busbar positive electrode detecting circuit 22 is measured, and the ratio of the voltage value after the voltage dividing to the voltage value before the voltage dividing is obtained as the first voltage dividing ratio, and the same manner can be adopted. Obtain the second partial pressure ratio.
  • a certain reference point can be selected (for example: large Ground, measuring a first voltage between the second end 222 of the busbar positive detection circuit 22 and the selected reference point, and measuring between the second end 232 of the busbar negative detection circuit 23 and the selected reference point a second voltage, the first voltage and the second voltage are analog-to-digital converted by an analog-to-digital converter (ADC) or other means, and the first voltage and the analog-to-digital converted by software
  • ADC analog-to-digital converter
  • the second voltage is subjected to soft differential processing, that is, the result of the product operation of the first voltage and the first voltage division ratio is compared with the result of the product operation of the second voltage and the second voltage division ratio to obtain the final bus voltage.
  • the number of voltage dividing resistors of the busbar positive electrode detecting circuit 22 and the busbar negative electrode detecting circuit 23 and the manner of linking therebetween may be the same or different. This embodiment is not limited.
  • the busbar voltage detecting circuit connects a busbar positive pole detecting circuit composed of a plurality of voltage dividing resistors on the positive pole of the bus circuit of the battery circuit, and connects the mother pole composed of a plurality of voltage dividing resistors in the busbar negative pole of the battery circuit.
  • the negative pole detecting circuit solves the pressure caused by the single board connection in the prior art according to the first voltage dividing ratio of the busbar positive detecting circuit and the second voltage dividing ratio of the busbar negative detecting circuit, and performs calculation to obtain the busbar voltage.
  • the problem of difference is to improve the accuracy of the busbar voltage detection and make the detection of the battery circuit more flexible.
  • FIG. 4 is a flow chart of Embodiment 1 of a busbar voltage detecting method according to the present invention. As shown in FIG. 4, the steps of the busbar voltage detecting method are:
  • S401 Detect a first voltage of the second end of the busbar positive detecting circuit relative to the reference point, and detect a second voltage of the second end of the busbar negative detecting circuit with respect to the reference point.
  • the first end of the busbar positive pole detecting circuit is connected to the busbar positive pole of the battery circuit, and the second end of the busbar positive pole detecting circuit is associated with a reference ground in the battery circuit.
  • the first end of the busbar negative pole detecting circuit is connected to the busbar negative pole of the battery circuit, and the second end of the busbar negative pole detecting circuit is common to the reference ground in the battery circuit.
  • S402 Acquire a busbar voltage according to the first voltage, the second voltage, a first voltage dividing ratio of the busbar positive detecting circuit, and a second voltage dividing ratio of the busbar negative detecting circuit.
  • the first voltage dividing ratio and the second voltage dividing ratio are obtained before being connected to the busbar voltage detecting circuit, and the manner of obtaining the busbar voltage may be manually detected or calculated by software.
  • the busbar voltage detecting method provided by this embodiment is connected through the busbar positive pole of the battery circuit
  • the busbar positive pole detecting circuit is connected to the busbar negative pole detecting circuit in the busbar negative pole of the battery circuit, and respectively measures the first voltage of the second end of the busbar positive pole detecting circuit and the second end of the busbar negative pole detecting circuit with respect to the reference point a second voltage, and according to the first voltage, the second voltage, the first voltage dividing ratio of the busbar positive detecting circuit and the second voltage dividing ratio of the busbar negative detecting circuit, calculating the busbar voltage, and solving the prior art
  • the voltage difference caused by the connection of the single board improves the accuracy of the busbar voltage detection.
  • the first voltage and the second voltage need to be analog-to-digital converted.
  • the analog-to-digital conversion in this embodiment can be realized by an analog-to-digital converter (ADC), or can be realized by a corresponding chip and software, and the detected continuously varying analog quantity is converted into discrete Digital quantity for subsequent operations in the busbar voltage process.
  • ADC analog-to-digital converter
  • step S402 is: performing a product operation on the first voltage and the first voltage division ratio to obtain a first output voltage of the busbar positive polarity detecting circuit. Performing a product operation on the second voltage and the second voltage dividing ratio to obtain a second output voltage of the busbar negative electrode detecting circuit.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Abstract

A busbar voltage measurement method and circuit. The busbar voltage measurement circuit comprises: a battery circuit (21), a busbar positive pole measurement circuit (22) and a busbar negative pole measurement circuit (23); a first terminal (221) of the busbar positive pole measurement circuit (22) is connected to the busbar positive pole (211) of the battery circuit (21); a second terminal (222) of the busbar positive pole measurement circuit (22) and the reference ground (213) of the battery circuit (21) are connected to a same ground; the rated voltage ratio of the busbar positive pole measurement circuit (22) is the first rated voltage ratio; a first terminal (232) of the busbar negative pole measurement circuit (23) is connected to the busbar negative pole (212) of the battery circuit (21); a second terminal (231) of the busbar negative pole measurement circuit (23) and the reference ground (213) of the battery circuit (21) are connected to a same ground; the rated voltage ratio of the busbar negative pole measurement circuit (23) is the second rated voltage ratio. The busbar voltage is obtained by performing calculations on a first voltage, a second voltage, the first rated voltage ratio, and the second rated voltage ratio of the busbar positive pole measurement circuit (22) and the busbar negative pole measurement circuit (23), thereby solving the problem in the prior art of voltage difference caused by single board connections and enhancing the busbar voltage measurement precision.

Description

母排电压检测方法和电路Busbar voltage detection method and circuit 技术领域Technical field
本发明实施例涉及电路领域，尤其涉及一种母排电压检测方法和电路。Embodiments of the present invention relate to the field of circuits, and in particular, to a busbar voltage detection method and circuit.
背景技术Background technique
电源管理系统中，通常会采用电池作为备电设备，为保证和延长电池的寿命，需要对电池进行智能管理。在对电池的管理过程中，需要检查电池电路在应用过程中的一些参数，例如：母排电压、电池电压、电池电流检测、电池熔丝检测等。In a power management system, a battery is usually used as a backup device. To ensure and extend the life of the battery, the battery needs to be intelligently managed. In the process of managing the battery, it is necessary to check some parameters of the battery circuit during the application process, such as: bus voltage, battery voltage, battery current detection, battery fuse detection, and the like.
图1为现有母排电压检测电路原理图。如图1所示，该检测电路包括：电池电路11、差分检测电路12以及转换电路13。其中，电池电路11为由电池、接触器、分流器、空开开关、继电器、二极管等组成的回路，现有技术中，对于母排电压的检测主要依赖于在电池电路的母排正极+48V端连接运放电路的同相端，在电池电路的母排负极-48V端通过转换电路11，组成一个差分检测电路12，该差分检测电路12和转换电路13在同一个单板上。通过该单板来实现对于电池电路的母排电压的检测。Figure 1 is a schematic diagram of a conventional busbar voltage detection circuit. As shown in FIG. 1, the detection circuit includes a battery circuit 11, a differential detection circuit 12, and a conversion circuit 13. The battery circuit 11 is a circuit composed of a battery, a contactor, a shunt, an open switch, a relay, a diode, etc. In the prior art, the detection of the bus voltage mainly depends on the positive bus of the bus circuit +48V. The end is connected to the non-inverting terminal of the operational amplifier circuit, and passes through the conversion circuit 11 at the negative terminal -48V end of the bus circuit of the battery circuit to form a differential detecting circuit 12, and the differential detecting circuit 12 and the converting circuit 13 are on the same single board. The detection of the busbar voltage of the battery circuit is achieved by the single board.
现有技术中的转换电路13与电池电路的母排负极-48端需要线路连接，线路上电流通过会造成压差，另外当交流停电时，备用电池启用后，接触器会断开，差分检测电路内的模拟公共地(Analog ground，简称AGND)失去参考点，都会造成母排电压检测结果的精确度。The switching circuit 13 in the prior art and the negative terminal -48 end of the busbar of the battery circuit need to be connected by a line, and the current passing through the line causes a voltage difference, and when the AC power is cut off, the contactor is disconnected after the backup battery is activated, and the differential detection is performed. The analog ground (AGND) in the circuit loses the reference point, which will result in the accuracy of the busbar voltage detection result.
发明内容Summary of the invention
本发明实施例提供一种母排电压检测方法和电路，通过对母排正极检测电路和母排负极检测电路的第一电压和第二电压跟第一分压比和第二分压比的运算，获取母排电压，解决了现有技术中单板连接造成的压差问题，提高母排电压检测的精确度。Embodiments of the present invention provide a method and a circuit for detecting a busbar voltage by calculating a first voltage and a second voltage of a busbar positive pole detecting circuit and a busbar negative pole detecting circuit with a first voltage dividing ratio and a second voltage dividing ratio The busbar voltage is obtained, which solves the problem of voltage difference caused by the connection of the single board in the prior art, and improves the accuracy of the voltage detection of the busbar.
本发明第一方面提供一种母排电压检测电路，包括： A first aspect of the present invention provides a busbar voltage detecting circuit, including:
电池电路、母排正极检测电路和母排负极检测电路；Battery circuit, busbar positive detecting circuit and busbar negative detecting circuit;
所述母排正极检测电路的第一端与所述电池电路的母排正极连接，所述母排正极检测电路的第二端与所述电池电路中的参考地共地，所述母排正极检测电路的分压比为第一分压比；a first end of the busbar positive pole detecting circuit is connected to a positive pole of the bus circuit of the battery circuit, and a second end of the busbar positive pole detecting circuit is common to a reference ground in the battery circuit, and the busbar positive pole The voltage dividing ratio of the detecting circuit is the first voltage dividing ratio;
所述母排负极检测电路的第一端与所述电池电路的母排负极连接，所述母排负极检测电路的第二端与所述电池电路中的所述参考地共地，所述母排负极检测电路的分压比为第二分压比。a first end of the busbar negative pole detecting circuit is connected to a busbar negative pole of the battery circuit, and a second end of the busbar negative pole detecting circuit is common to the reference ground in the battery circuit, the mother The partial pressure ratio of the negative electrode detecting circuit is the second partial pressure ratio.
结合第一方面，在第一方面的第一种可能的实施方式中，所述母排正极检测电路包括至少一个分压电阻；所述母排负极检测电路包括至少一个分压电阻。In conjunction with the first aspect, in a first possible implementation of the first aspect, the busbar positive polarity detecting circuit includes at least one voltage dividing resistor; and the busbar negative electrode detecting circuit includes at least one voltage dividing resistor.
结合第一方面的第一种可能的实施方式，在第一方面的第二种可能的实施方式中，所述母排正极检测电路包括两个或两个以上分压电阻，且所述两个或两个以上分压电阻采用串联和/或并联连接；In conjunction with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the busbar positive polarity detecting circuit includes two or more voltage dividing resistors, and the two Or two or more voltage dividing resistors are connected in series and/or in parallel;
所述母排负极检测电路包括两个或两个以上分压电阻，且所述两个或两个以上分压电阻采用串联和/或并联连接。The busbar negative pole detecting circuit includes two or more voltage dividing resistors, and the two or more voltage dividing resistors are connected in series and/or in parallel.
本发明第二方面提供一种母排电压检测电路的检测方法，包括：A second aspect of the present invention provides a method for detecting a busbar voltage detecting circuit, including:
检测母排正极检测电路的第二端相对于参考点的第一电压，并检测母排负极检测电路的第二端相对于所述参考点的第二电压；其中，所述母排正极检测电路的第一端与所述电池电路的母排正极连接，所述母排正极检测电路的第二端与所述电池电路中的参考地共地，所述母排负极检测电路的第一端与所述电池电路的母排负极连接，所述母排负极检测电路的第二端与所述电池电路中的所述参考地共地；Detecting a first voltage of the second end of the busbar positive detecting circuit relative to the reference point, and detecting a second voltage of the second end of the busbar negative detecting circuit with respect to the reference point; wherein the busbar positive detecting circuit The first end of the bus circuit is connected to the positive electrode of the bus circuit, the second end of the bus bar positive detecting circuit is common to the reference ground in the battery circuit, and the first end of the bus bar negative detecting circuit is a busbar negative pole of the battery circuit is connected, a second end of the busbar negative pole detecting circuit is co-located with the reference ground in the battery circuit;
根据所述第一电压、所述第二电压、所述母排正极检测电路的第一分压比以及所述母排负极检测电路的第二分压比，获取母排电压。And obtaining a busbar voltage according to the first voltage, the second voltage, a first voltage dividing ratio of the busbar positive electrode detecting circuit, and a second voltage dividing ratio of the busbar negative electrode detecting circuit.
结合第二方面，在第二方面的第一种可能的实施方式中，所述根据所述第一电压、所述第二电压、所述母排正极检测电路的第一分压比以及所述母排负极检测电路的第二分压比，获取母排电压之前，还包括：In conjunction with the second aspect, in a first possible implementation of the second aspect, the first voltage dividing ratio according to the first voltage, the second voltage, the busbar positive pole detecting circuit, and the The second voltage dividing ratio of the busbar negative detecting circuit, before acquiring the busbar voltage, further includes:
对所述第一电压和所述第二电压进行模数转换。Performing analog to digital conversion on the first voltage and the second voltage.
结合第二方面的第一种可能的实施方式，在第二方面的第二种可能的实施方式中，所述根据所述第一电压、所述第二电压、所述母排正极检测 电路的第一分压比以及所述母排负极检测电路的第二分压比，获取母排电压，包括：In conjunction with the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the detecting, according to the first voltage, the second voltage, the busbar positive pole a first voltage dividing ratio of the circuit and a second voltage dividing ratio of the busbar negative detecting circuit to obtain a busbar voltage, including:
对所述第一电压与所述第一分压比做乘积运算，得到所述母排正极检测电路的第一输出电压；Performing a product operation on the first voltage and the first voltage dividing ratio to obtain a first output voltage of the busbar positive detecting circuit;
对所述第二电压与所述第二分压比做乘积运算，得到所述母排负极检测电路的第二输出电压；Performing a product operation on the second voltage and the second voltage dividing ratio to obtain a second output voltage of the busbar negative electrode detecting circuit;
对所述第一输出电压与所述第二输出电压做差值运算，得到所述母排电压。Performing a difference operation between the first output voltage and the second output voltage to obtain the busbar voltage.
本发明实施例提供的母排电压检测方法和电路，通过在电池电路的母排正极连接母排正极检测电路，在电池电路的母排负极连接母排负极检测电路，分别测量母排正极检测电路的第二端和母排负极检测电路的第二端相对于参考点的第一电压和第二电压，并根据该第一电压、第二电压、母排正极检测电路的第一分压比和母排负极检测电路的第二分压比，运算获取母排电压，解决了现有技术中单板连接造成的压差问题，提高母排电压检测的精确度。The busbar voltage detecting method and circuit provided by the embodiments of the present invention connect the busbar positive pole detecting circuit in the busbar positive pole of the battery circuit, and connect the busbar negative pole detecting circuit in the busbar anode of the battery circuit to respectively measure the busbar positive pole detecting circuit. The second end and the second end of the busbar negative detecting circuit are opposite to the first voltage and the second voltage of the reference point, and according to the first voltage, the second voltage, the first voltage dividing ratio of the busbar positive detecting circuit, and The second voltage dividing ratio of the busbar negative detecting circuit is calculated to obtain the busbar voltage, which solves the problem of the voltage difference caused by the single board connection in the prior art, and improves the accuracy of the busbar voltage detection.
附图说明DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.
图1为现有母排电压检测电路原理图；Figure 1 is a schematic diagram of a conventional busbar voltage detecting circuit;
图2为本发明母排电压检测电路实施例一的结构示意图；2 is a schematic structural view of Embodiment 1 of a busbar voltage detecting circuit of the present invention;
图3为本发明母排电压检测电路实施例三的结构示意图；3 is a schematic structural view of a third embodiment of a busbar voltage detecting circuit of the present invention;
图4为本发明母排电压检测方法实施例一的流程图。4 is a flow chart of Embodiment 1 of a busbar voltage detecting method according to the present invention.
具体实施方式detailed description
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描 述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention more clearly, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It is apparent that the described embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
图2为本发明母排电压检测电路实施例一的结构示意图。如图2所示，该母排电压检测电路包括：电池电路21、母排正极检测电路22和母排负极检测电路23。所述母排正极检测电路22的第一端221与所述电池电路21的母排正极211连接，所述母排正极检测电路22的第二端222与所述电池电路21中的参考地213共地，所述母排正极检测电路22的分压比为第一分压比。2 is a schematic structural view of Embodiment 1 of a busbar voltage detecting circuit of the present invention. As shown in FIG. 2, the busbar voltage detecting circuit includes a battery circuit 21, a busbar positive detecting circuit 22, and a busbar negative detecting circuit 23. The first end 221 of the busbar positive pole detecting circuit 22 is connected to the busbar positive pole 211 of the battery circuit 21, the second end 222 of the busbar positive pole detecting circuit 22 and the reference ground 213 in the battery circuit 21. In common, the voltage dividing ratio of the busbar positive electrode detecting circuit 22 is the first voltage dividing ratio.
所述母排负极检测电路23的第一端231与所述电池电路21的母排负极213连接，所述母排负极检测电路23的第二端232与所述电池电路21中的所述参考地213共地或者连接，所述母排负极检测电路23的分压比为第二分压比。The first end 231 of the busbar negative electrode detecting circuit 23 is connected to the busbar negative electrode 213 of the battery circuit 21, and the second end 232 of the busbar negative electrode detecting circuit 23 and the reference in the battery circuit 21 The ground 213 is connected or connected in common, and the partial pressure ratio of the busbar negative electrode detecting circuit 23 is a second voltage dividing ratio.
在本实施例中，母排正极检测电路22和母排负极检测电路23是外接在电池电路21的母排正极211和母排负极212两端的分压电路，用于对电池电路21两端的电压进行分压，可以由任意的分压元件组成，根据实际情况调整具体元件的参数，该母排正极检测电路22的第一分压比和母排负极检测电路23的第二分压比必须在连接该检测电路之前确定，该第一分压比和第二分压比可以相同，也可以不相同。通过何种方式确定分压比本发明不做限制。In the present embodiment, the busbar positive electrode detecting circuit 22 and the busbar negative electrode detecting circuit 23 are voltage dividing circuits externally connected to the busbar positive electrode 211 and the busbar negative electrode 212 of the battery circuit 21 for voltages across the battery circuit 21. The partial pressure may be composed of any voltage dividing element, and the parameters of the specific component may be adjusted according to actual conditions. The first voltage dividing ratio of the busbar positive detecting circuit 22 and the second voltage dividing ratio of the busbar negative detecting circuit 23 must be Before connecting the detecting circuit, it is determined that the first partial pressure ratio and the second partial pressure ratio may be the same or different. The manner in which the partial pressure is determined is not limited by the present invention.
母排正极检测电路22和母排负极检测电路23可以根据系统的需求连接在相应的位置，组成系统大闭环，检测点更为灵活。The busbar positive pole detecting circuit 22 and the busbar negative pole detecting circuit 23 can be connected at corresponding positions according to the requirements of the system to form a large closed loop of the system, and the detecting points are more flexible.
本发明实施例提供的母排电压检测电路，通过在电池电路的母排正极连接母排正极检测电路，在电池电路的母排负极连接母排负极检测电路，根据母排正极检测电路的第一分压比和母排负极检测电路的第二分压比，获取母排电压，解决了现有技术中单板连接造成的压差问题，提高母排电压检测的精确度，并使对电池电路的检测更为灵活。The busbar voltage detecting circuit provided by the embodiment of the invention connects the busbar positive pole detecting circuit to the busbar positive pole of the battery circuit, and connects the busbar negative pole detecting circuit to the busbar anode of the battery circuit, according to the first row of the busbar positive detecting circuit. The voltage dividing ratio and the second voltage dividing ratio of the busbar negative detecting circuit acquire the busbar voltage, solve the problem of the voltage difference caused by the single board connection in the prior art, improve the accuracy of the busbar voltage detection, and make the battery circuit The detection is more flexible.
在母排电压检测电路实施例二中，在上述图1所示的实施例的基础上，优选的，所述母排正极检测电路22包括至少一个分压电阻，所述母排负极检测电路23包括至少一个分压电阻。 In the second embodiment of the busbar voltage detecting circuit, based on the embodiment shown in FIG. 1, preferably, the busbar positive detecting circuit 22 includes at least one voltage dividing resistor, and the busbar negative detecting circuit 23 Includes at least one voltage divider resistor.
在本实施例中，母排正极检测电路22或母排负极检测电路23可以由分压电阻组成，对于分压电阻的数量不做限制，可根据实际情况选择合适的阻值和个数。In this embodiment, the busbar positive pole detecting circuit 22 or the busbar negative pole detecting circuit 23 may be composed of a voltage dividing resistor. The number of the voltage dividing resistors is not limited, and an appropriate resistance value and number may be selected according to actual conditions.
可选的，所述母排正极检测电路22包括两个或两个以上分压电阻，且所述两个或两个以上分压电阻采用串联和/或并联连接；所述母排负极检测电路23包括两个或两个以上分压电阻，且所述两个或两个以上分压电阻采用串联和/或并联连接。Optionally, the busbar positive pole detecting circuit 22 includes two or more voltage dividing resistors, and the two or more voltage dividing resistors are connected in series and/or in parallel; the busbar negative pole detecting circuit 23 includes two or more voltage dividing resistors, and the two or more voltage dividing resistors are connected in series and/or in parallel.
在本实施例中，当母排正极检测电路22或母排负极检测电路23由多个分压电阻组成时，该多个分压电阻的链接方式可以为串联、并联，或者任意的串并联组合。下面特举一实例说明该母排电路检测电路的结构和原理：In this embodiment, when the busbar positive electrode detecting circuit 22 or the busbar negative electrode detecting circuit 23 is composed of a plurality of voltage dividing resistors, the plurality of voltage dividing resistors may be connected in series, in parallel, or in any series-parallel combination. . The following is an example to illustrate the structure and principle of the busbar circuit detection circuit:
图3为本发明母排电压检测电路实施例三的结构示意图，本实施例的电池电路内部结构本发明不做限制，可以为由电池、接触器、分流器、空开开关、继电器、二极管等组成的母排电路，也可以为其他电源管理系统的中的供电电路。如图3所示，本实施例中的母排正极检测电路22由分压电阻R12、R13、R14、R15、R16、R17组成，其中，R12、R13、R14、R15与并联链接的R16与R17依次串联连接，这些分压电阻的阻值可以根据实际情况选择，该母排正极检测电路22的第一端221与电池电路21的母排正极211连接，第二端222与电池电路21内部的参考地213共地或者连接。母排负极检测电路23由分压电阻R18、R19、R20、R21、R22、R23组成，其中，R18、R10、R20、R21与并联链接的R22与R23依次串联连接，这些分压电阻的阻值可以根据实际情况选择，该母排负极检测电路22的第一端232与电池电路21的母排负极212连接，第二端231与电池电路21内部的参考地213共地。在连接该母排电压检测电路之前，需要确定母排正极检测电路22和母排负极检测电路23的第一分压比和第二分压比，可以通过将母排正极检测电路22连接在其他供电电路中，测量通过该母排正极检测电路22分压后的电压值，并获取该分压后的电压值与分压前的电压值的比值作为第一分压比，可通过同样的方式获取第二分压比。3 is a schematic structural view of a third embodiment of the bus voltage detecting circuit of the present invention. The internal structure of the battery circuit of the present embodiment is not limited, and may be a battery, a contactor, a shunt, an open switch, a relay, a diode, etc. The busbar circuit is also composed of power supply circuits in other power management systems. As shown in FIG. 3, the busbar positive electrode detecting circuit 22 in this embodiment is composed of voltage dividing resistors R12, R13, R14, R15, R16, and R17, wherein R12, R13, R14, and R15 are connected with R16 and R17 in parallel. The resistance values of the voltage dividing resistors can be selected according to actual conditions. The first end 221 of the busbar positive pole detecting circuit 22 is connected to the busbar positive pole 211 of the battery circuit 21, and the second end 222 is internal to the battery circuit 21. Reference ground 213 is common or connected. The busbar negative pole detecting circuit 23 is composed of voltage dividing resistors R18, R19, R20, R21, R22, and R23, wherein R18, R10, R20, and R21 are connected in series with R22 and R23 connected in parallel, and the resistance values of these voltage dividing resistors are sequentially connected. According to the actual situation, the first end 232 of the busbar negative electrode detecting circuit 22 is connected to the busbar negative electrode 212 of the battery circuit 21, and the second end 231 is shared with the reference ground 213 inside the battery circuit 21. Before connecting the busbar voltage detecting circuit, it is necessary to determine the first voltage dividing ratio and the second voltage dividing ratio of the busbar positive detecting circuit 22 and the busbar negative detecting circuit 23, and the busbar positive detecting circuit 22 can be connected to other In the power supply circuit, the voltage value after being divided by the busbar positive electrode detecting circuit 22 is measured, and the ratio of the voltage value after the voltage dividing to the voltage value before the voltage dividing is obtained as the first voltage dividing ratio, and the same manner can be adopted. Obtain the second partial pressure ratio.
连接完成该母排电压检测电路后，可选定某确定的参考点(例如：大 地)，测量母排正极检测电路22的第二端222与该选定参考点之间的第一电压，并测量母排负极检测电路23的第二端232与该选定参考点之间的第二电压，将该第一电压和第二电压通过模数转换器(Analog-to-Digital Converter，简称ADC)或者其他方式进行模数转换，并通过软件对模数转换后的第一电压和第二电压进行软差分处理，即：第一电压和第一分压比的乘积运算结果与第二电压和第二分压比的乘积运算结果的做差值运算，获取最终的母排电压。After the connection completes the busbar voltage detection circuit, a certain reference point can be selected (for example: large Ground, measuring a first voltage between the second end 222 of the busbar positive detection circuit 22 and the selected reference point, and measuring between the second end 232 of the busbar negative detection circuit 23 and the selected reference point a second voltage, the first voltage and the second voltage are analog-to-digital converted by an analog-to-digital converter (ADC) or other means, and the first voltage and the analog-to-digital converted by software The second voltage is subjected to soft differential processing, that is, the result of the product operation of the first voltage and the first voltage division ratio is compared with the result of the product operation of the second voltage and the second voltage division ratio to obtain the final bus voltage.
此外，本实施例中，母排正极检测电路22和母排负极检测电路23的分压电阻数量和其之间的链接方式可以相同，也可以不同。本实施例不做限制。In addition, in this embodiment, the number of voltage dividing resistors of the busbar positive electrode detecting circuit 22 and the busbar negative electrode detecting circuit 23 and the manner of linking therebetween may be the same or different. This embodiment is not limited.
本发明实施例提供的母排电压检测电路，通过在电池电路的母排正极连接由若干分压电阻组成的母排正极检测电路，在电池电路的母排负极连接由若干分压电阻组成的母排负极检测电路，根据母排正极检测电路的第一分压比和母排负极检测电路的第二分压比，并进行运算获取母排电压，解决了现有技术中单板连接造成的压差问题，提高母排电压检测的精确度，并使对电池电路的检测更为灵活。The busbar voltage detecting circuit provided by the embodiment of the invention connects a busbar positive pole detecting circuit composed of a plurality of voltage dividing resistors on the positive pole of the bus circuit of the battery circuit, and connects the mother pole composed of a plurality of voltage dividing resistors in the busbar negative pole of the battery circuit. The negative pole detecting circuit solves the pressure caused by the single board connection in the prior art according to the first voltage dividing ratio of the busbar positive detecting circuit and the second voltage dividing ratio of the busbar negative detecting circuit, and performs calculation to obtain the busbar voltage. The problem of difference is to improve the accuracy of the busbar voltage detection and make the detection of the battery circuit more flexible.
图4为本发明母排电压检测方法实施例一的流程图。如图4所示，该母排电压检测方法的步骤为：4 is a flow chart of Embodiment 1 of a busbar voltage detecting method according to the present invention. As shown in FIG. 4, the steps of the busbar voltage detecting method are:
S401：检测母排正极检测电路的第二端相对于参考点的第一电压，并检测母排负极检测电路的第二端相对于所述参考点的第二电压。S401: Detect a first voltage of the second end of the busbar positive detecting circuit relative to the reference point, and detect a second voltage of the second end of the busbar negative detecting circuit with respect to the reference point.
在本实施例中，所述母排正极检测电路的第一端与所述电池电路的母排正极连接，所述母排正极检测电路的第二端与所述电池电路中的参考地共地，所述母排负极检测电路的第一端与所述电池电路的母排负极连接，所述母排负极检测电路的第二端与所述电池电路中的所述参考地共地。In this embodiment, the first end of the busbar positive pole detecting circuit is connected to the busbar positive pole of the battery circuit, and the second end of the busbar positive pole detecting circuit is associated with a reference ground in the battery circuit. The first end of the busbar negative pole detecting circuit is connected to the busbar negative pole of the battery circuit, and the second end of the busbar negative pole detecting circuit is common to the reference ground in the battery circuit.
S402：根据所述第一电压、所述第二电压、所述母排正极检测电路的第一分压比以及所述母排负极检测电路的第二分压比，获取母排电压。S402: Acquire a busbar voltage according to the first voltage, the second voltage, a first voltage dividing ratio of the busbar positive detecting circuit, and a second voltage dividing ratio of the busbar negative detecting circuit.
在本实施例中，第一分压比和第二分压比在连接母排电压检测电路之前获取，该获取母排电压的方式可以为人工检测计算，也可以通过软件实现。In this embodiment, the first voltage dividing ratio and the second voltage dividing ratio are obtained before being connected to the busbar voltage detecting circuit, and the manner of obtaining the busbar voltage may be manually detected or calculated by software.
本实施例提供的母排电压检测方法，通过在电池电路的母排正极连接 母排正极检测电路，在电池电路的母排负极连接母排负极检测电路，分别测量母排正极检测电路的第二端和母排负极检测电路的第二端相对于参考点的第一电压和第二电压，并根据该第一电压、第二电压、母排正极检测电路的第一分压比和母排负极检测电路的第二分压比，运算获取母排电压，解决了现有技术中单板连接造成的压差问题，提高母排电压检测的精确度。The busbar voltage detecting method provided by this embodiment is connected through the busbar positive pole of the battery circuit The busbar positive pole detecting circuit is connected to the busbar negative pole detecting circuit in the busbar negative pole of the battery circuit, and respectively measures the first voltage of the second end of the busbar positive pole detecting circuit and the second end of the busbar negative pole detecting circuit with respect to the reference point a second voltage, and according to the first voltage, the second voltage, the first voltage dividing ratio of the busbar positive detecting circuit and the second voltage dividing ratio of the busbar negative detecting circuit, calculating the busbar voltage, and solving the prior art The voltage difference caused by the connection of the single board improves the accuracy of the busbar voltage detection.
在上述图4所示实施例的基础上，步骤S402之前，还需要对所述第一电压和所述第二电压进行模数转换。本实施例中的模数转换可通过模数转换器(Analog-to-Digital Converter，简称ADC)实现，也可通过相应的芯片和软件实现，将检测到的连续变化的模拟量转换成为离散的数字量，以便后续获取母排电压过程中的运算。Based on the embodiment shown in FIG. 4 above, before the step S402, the first voltage and the second voltage need to be analog-to-digital converted. The analog-to-digital conversion in this embodiment can be realized by an analog-to-digital converter (ADC), or can be realized by a corresponding chip and software, and the detected continuously varying analog quantity is converted into discrete Digital quantity for subsequent operations in the busbar voltage process.
进一步的，步骤S402的具体实现方式为：对所述第一电压与所述第一分压比做乘积运算，得到所述母排正极检测电路的第一输出电压。对所述第二电压与所述第二分压比做乘积运算，得到所述母排负极检测电路的第二输出电压。Further, the specific implementation of step S402 is: performing a product operation on the first voltage and the first voltage division ratio to obtain a first output voltage of the busbar positive polarity detecting circuit. Performing a product operation on the second voltage and the second voltage dividing ratio to obtain a second output voltage of the busbar negative electrode detecting circuit.
将上述步骤中的所述第一输出电压与所述第二输出电压做差值运算，得到所述母排电压。Comparing the first output voltage in the above step with the second output voltage to obtain the busbar voltage.
具体的检测方式参考图3所示的实施例，其实现原理和技术效果类似，此处不再赘述。For a specific detection manner, refer to the embodiment shown in FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.
本领域普通技术人员可以理解：实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时，执行包括上述各方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above may be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。 Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims (6)

  1. 一种母排电压检测电路，其特征在于，包括：A busbar voltage detecting circuit is characterized by comprising:
    电池电路、母排正极检测电路和母排负极检测电路；Battery circuit, busbar positive detecting circuit and busbar negative detecting circuit;
    所述母排正极检测电路的第一端与所述电池电路的母排正极连接，所述母排正极检测电路的第二端与所述电池电路中的参考地共地，所述母排正极检测电路的分压比为第一分压比；a first end of the busbar positive pole detecting circuit is connected to a positive pole of the bus circuit of the battery circuit, and a second end of the busbar positive pole detecting circuit is common to a reference ground in the battery circuit, and the busbar positive pole The voltage dividing ratio of the detecting circuit is the first voltage dividing ratio;
    所述母排负极检测电路的第一端与所述电池电路的母排负极连接，所述母排负极检测电路的第二端与所述电池电路中的所述参考地共地，所述母排负极检测电路的分压比为第二分压比。a first end of the busbar negative pole detecting circuit is connected to a busbar negative pole of the battery circuit, and a second end of the busbar negative pole detecting circuit is common to the reference ground in the battery circuit, the mother The partial pressure ratio of the negative electrode detecting circuit is the second partial pressure ratio.
  2. 根据权利要求1所述的母排电压检测电路，其特征在于，所述母排正极检测电路包括至少一个分压电阻；所述母排负极检测电路包括至少一个分压电阻。The busbar voltage detecting circuit according to claim 1, wherein said busbar positive electrode detecting circuit comprises at least one voltage dividing resistor; and said busbar negative electrode detecting circuit comprises at least one voltage dividing resistor.
  3. 根据权利要求2所述的母排电压检测电路，其特征在于，所述母排正极检测电路包括两个或两个以上分压电阻，且所述两个或两个以上分压电阻采用串联和/或并联连接；The busbar voltage detecting circuit according to claim 2, wherein said busbar positive electrode detecting circuit comprises two or more voltage dividing resistors, and said two or more voltage dividing resistors are connected in series and / or connected in parallel;
    所述母排负极检测电路包括两个或两个以上分压电阻，且所述两个或两个以上分压电阻采用串联和/或并联连接。The busbar negative pole detecting circuit includes two or more voltage dividing resistors, and the two or more voltage dividing resistors are connected in series and/or in parallel.
  4. 一种母排电压检测电路的检测方法，其特征在于，包括：A method for detecting a busbar voltage detecting circuit, comprising:
    检测母排正极检测电路的第二端相对于参考点的第一电压，并检测母排负极检测电路的第二端相对于所述参考点的第二电压；其中，所述母排正极检测电路的第一端与所述电池电路的母排正极连接，所述母排正极检测电路的第二端与所述电池电路中的参考地共地，所述母排负极检测电路的第一端与所述电池电路的母排负极连接，所述母排负极检测电路的第二端与所述电池电路中的所述参考地共地；Detecting a first voltage of the second end of the busbar positive detecting circuit relative to the reference point, and detecting a second voltage of the second end of the busbar negative detecting circuit with respect to the reference point; wherein the busbar positive detecting circuit The first end of the bus circuit is connected to the positive electrode of the bus circuit, the second end of the bus bar positive detecting circuit is common to the reference ground in the battery circuit, and the first end of the bus bar negative detecting circuit is a busbar negative pole of the battery circuit is connected, a second end of the busbar negative pole detecting circuit is co-located with the reference ground in the battery circuit;
    根据所述第一电压、所述第二电压、所述母排正极检测电路的第一分压比以及所述母排负极检测电路的第二分压比，获取母排电压。And obtaining a busbar voltage according to the first voltage, the second voltage, a first voltage dividing ratio of the busbar positive electrode detecting circuit, and a second voltage dividing ratio of the busbar negative electrode detecting circuit.
  5. 根据权利要求4所述的方法，其特征在于，所述根据所述第一电压、所述第二电压、所述母排正极检测电路的第一分压比以及所述母排负极检测电路的第二分压比，获取母排电压之前，还包括：The method according to claim 4, wherein said first voltage, said second voltage, said first voltage dividing ratio of said busbar positive detecting circuit, and said busbar negative detecting circuit The second partial pressure ratio, before acquiring the bus voltage, also includes:
    对所述第一电压和所述第二电压进行模数转换。 Performing analog to digital conversion on the first voltage and the second voltage.
  6. 根据权利要求4或5所述的方法，其特征在于，所述根据所述第一电压、所述第二电压、所述母排正极检测电路的第一分压比以及所述母排负极检测电路的第二分压比，获取母排电压，包括：The method according to claim 4 or 5, wherein said first voltage dividing ratio according to said first voltage, said second voltage, said busbar positive electrode detecting circuit, and said busbar negative electrode detecting The second voltage division ratio of the circuit to obtain the bus voltage, including:
    对所述第一电压与所述第一分压比做乘积运算，得到所述母排正极检测电路的第一输出电压；Performing a product operation on the first voltage and the first voltage dividing ratio to obtain a first output voltage of the busbar positive detecting circuit;
    对所述第二电压与所述第二分压比做乘积运算，得到所述母排负极检测电路的第二输出电压；Performing a product operation on the second voltage and the second voltage dividing ratio to obtain a second output voltage of the busbar negative electrode detecting circuit;
    对所述第一输出电压与所述第二输出电压做差值运算，得到所述母排电压。 Performing a difference operation between the first output voltage and the second output voltage to obtain the busbar voltage.
PCT/CN2015/077349 2014-04-25 2015-04-24 Busbar voltage measurement method and circuit WO2015161822A1 (en)

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