CN220207811U

CN220207811U - Battery pack voltage inspection equipment based on industrial uninterruptible power supply

Info

Publication number: CN220207811U
Application number: CN202321483093.9U
Authority: CN
Inventors: 赵龙; 高洪良; 张立; 李娇娜; 李�浩; 母传亚; 王梦峤; 赵福升; 夏银山
Original assignee: Shenyang Ruijie Electric Power Technology Co ltd
Current assignee: Shenyang Ruijie Electric Power Technology Co ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-12-19
Anticipated expiration: 2033-06-12

Abstract

The utility model belongs to the technical field of electronic equipment, and particularly relates to battery pack voltage inspection equipment based on an industrial uninterruptible power supply. The method can effectively detect the voltage value of each battery of the multi-section series battery pack, and the electromagnetic isolation technology and the high-frequency electronic switch are used for carrying out cooperative work so as to collect the voltage of each battery. The device comprises a series battery pack, an isolation acquisition module, a voltage processing module, a singlechip module, a 485 communication module and an upper computer; the serial battery pack is connected with the isolation acquisition module, the isolation acquisition module is connected with the voltage processing module, the singlechip module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module, the 485 communication module is connected with the upper computer, and the power module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module.

Description

Battery pack voltage inspection equipment based on industrial uninterruptible power supply

Technical Field

The utility model belongs to the technical field of electronic equipment, and particularly relates to battery pack voltage inspection equipment based on an industrial uninterruptible power supply.

Background

In industrial uninterruptible power supplies, the working condition of the lead-acid battery pack plays an absolute role, and detecting the voltage value of each battery is important, because tens of batteries are connected in series, the voltage reaches hundreds of volts, and if manual detection is performed, manpower is wasted, and danger is more likely to occur in operation.

The traditional battery pack detection adopts relay or optocoupler switching detection, the above detection mode not only can generate a fire, but also can be accompanied with false detection and false judgment caused by high switching frequency and huge heating value, and the situation of high-voltage direct current short circuit of the battery pack caused by long-term high-frequency opening and closing of a switching contact can also occur more seriously, so that normal working industrial field equipment is stopped, and even fire is easily caused by short circuit of the battery.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides battery pack voltage inspection equipment based on an industrial uninterruptible power supply. The device can effectively detect the voltage value of each battery of a plurality of series battery packs, and uses the electromagnetic isolation technology and the high-frequency electronic switch to perform cooperative work so as to collect the voltage of each battery.

In order to achieve the purpose, the utility model adopts the following technical scheme that the battery pack comprises a series battery pack, an isolation acquisition module, a voltage processing module, a singlechip module, a 485 communication module and an upper computer.

The serial battery pack is connected with the isolation acquisition module, the isolation acquisition module is connected with the voltage processing module, the singlechip module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module, the 485 communication module is connected with the upper computer, and the power module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module.

Further, the isolation acquisition module comprises a plurality of isolation acquisition units, the number of the isolation acquisition units is equal to the number of the batteries in the series battery pack, and each battery in the series battery pack corresponds to one isolation acquisition unit.

The isolation acquisition unit comprises a first battery, a first resistor, a seventh resistor, a first tantalum capacitor, a first diode, a second diode, a first homonymous end homonymous magnetic ring double inductor and a first high-frequency MOS switch tube.

The positive pole of first battery is connected one end of first resistance, the negative pole of first battery is connected one end of second resistance, the other end of first resistance is connected with one end of third resistance and one end of fourth resistance respectively, the other end of second resistance is connected with the other end of third resistance and one end of fifth resistance respectively, the other end of fourth resistance is connected with the positive pole of first tantalum capacitor and the negative pole of second diode respectively, the other end of fifth resistance is connected with the positive pole of first diode and the 4 feet of first homonymous end homonymous magnetic ring double inductance respectively, the negative pole of first tantalum capacitor is connected with the negative pole of first diode, the positive pole of second diode is connected with the 3 feet of first homonymous end homonymous magnetic ring double inductance, the 1 foot of first homonymous end homonymous magnetic ring double inductance is connected with one end of seventh resistance, the 2 feet of first homonymous end homonymous magnetic ring double inductance are connected with the 3 feet of first high frequency MOS switch tube, the other end of seventh resistance is connected with voltage processing module (ComMOS signal processing module) and the first homonymous end of first diode and the high frequency MOS switch tube (SCM), the other end of first SCM is connected with the high frequency MOS signal processing module (SCM), the SCM is connected with the first MOS signal pin of six SCM 1.

Further, the voltage processing module includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a diode D1, a diode D2, a high-frequency MOS switch Q1, a high-frequency MOS switch Q2, a capacitor C1, an operational amplifier OP1A, an operational amplifier OP2A, and an operational amplifier OP3A.

One end of a resistor R2 is respectively connected with an isolation acquisition module (ComFoot signal end), the cathode of a diode D1, the anode of the diode D2 and one end of a resistor R11, the other end of the resistor R2 is respectively connected with a 3 pin of a high-frequency MOS switch tube Q1, one end of a capacitor C1 and one end of a resistor R3, the 2 pin of the high-frequency MOS switch tube Q1 is respectively connected with the anode of the diode D1, the other end of the capacitor C1 and GND signal ground, the 1 pin of the high-frequency MOS switch tube Q1 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with a singlechip module (PWM_P singlechip signal), the other end of the resistor R3 is respectively connected with one end of the resistor R2 and the 3 pin of an operational amplifier OP1A, the other end of the resistor R1 is connected with GND signal ground, the 2 pin of the operational amplifier OP1A is respectively connected with one end of a resistor R7 and one end of a resistor R8, the other end of the resistor R7 is connected with a 2.5V direct current power supply, the other end of the resistor R8 is respectively connected with the 1 pin of the operational amplifier OP1A and one end of the resistor R4, the 8 pin of the operational amplifier OP1A is connected with a 5V direct current power supply, the 4 pin of the operational amplifier OP1A is connected with GND signal ground, the other end of the resistor R4 is connected with the 3 pin of the operational amplifier OP2A, the 2 pin of the operational amplifier OP2A is respectively connected with the 1 pin of the operational amplifier OP2A and one end of the resistor R5, the 8 pin of the operational amplifier OP2A is connected with the 5V direct current power supply, the 4 pin of the operational amplifier OP2A is connected with GND signal ground, the other end of the resistor R5 is connected with a single chip microcomputer module (VoADC single chip microcomputer analog acquisition signal), the cathode of the diode D2 is connected with the 3 pin of the high-frequency PWM switching tube Q2, the 2 pin of the high-frequency PWM switching tube Q2 is connected with GND signal ground, the 1 pin of the high-frequency PWM switching tube Q2 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with a singlechip module (RSW singlechip signal), the other end of the resistor R11 is respectively connected with a 2 pin of the operational amplifier OP3A and a 1 pin of the operational amplifier OP3A, a 3 pin of the operational amplifier OP3A is connected with one end of the resistor R10, an 8 pin of the operational amplifier OP3A is connected with a 5V direct current power supply, a 4 pin of the operational amplifier OP3A is connected with a GND signal ground, and the other end of the resistor R10 is connected with the (PWM_N singlechip signal) singlechip module.

Further, the series battery pack includes 10 batteries.

Compared with the prior art, the utility model has the beneficial effects.

The utility model provides battery pack voltage inspection equipment based on an industrial uninterruptible power supply, wherein all circuits in the equipment are isolated from an external power supply, and an electromagnetic isolation technology and a high-frequency electronic switch are used for carrying out cooperative work so as to collect the voltage of each battery, so that the electronic devices in the equipment are not interfered by the outside, and the sampling precision of each battery is improved; the inside of the equipment is controlled by adopting a high-frequency electronic switch, 1 battery can be collected within 50 microseconds, and the response time and sampling frequency of the whole equipment are improved; because the equipment does not have large-scale power devices, the equipment does not generate heat even if the equipment works continuously for a long time, and the stability of the equipment in continuous long time work is improved; the device can be used independently or online, when the number of the batteries in the battery pack exceeds the maximum number of the measurable batteries of the device, the device can meet the expansion requirement only by orderly connecting the devices in parallel, and the modularized use of the device is truly realized; the device has the characteristics of low heating, low error, low fault, high flexibility, high precision and high stability.

Drawings

The utility model is further described below with reference to the drawings and the detailed description. The scope of the present utility model is not limited to the following description.

Fig. 1 is a system block diagram of the voltage patrol apparatus of the present utility model.

Fig. 2 is a schematic circuit diagram of an isolated acquisition module according to an embodiment.

Fig. 3 is a schematic circuit diagram of a voltage processing module according to an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more clear, the present utility model will be described in further detail with reference to the accompanying drawings and specific embodiments. The specific embodiments described herein are to be considered in an illustrative sense only and are not intended to limit the utility model.

As shown in fig. 1, the battery pack voltage inspection device based on the industrial uninterruptible power supply comprises a series battery pack, an isolation acquisition module (also called an isolation acquisition circuit), a voltage processing module (also called a voltage processing circuit), a singlechip module, a 485 communication module and an upper computer; the serial battery pack is connected with the isolation acquisition module, the isolation acquisition module is connected with the voltage processing module, the singlechip module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module, the 485 communication module is connected with the upper computer, and the power module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module.

The isolation acquisition circuit is used for realizing that all signal processing and acquisition loops in the equipment share one reference ground in an electromagnetic isolation mode for the voltage of each battery in the battery pack, so as to meet the requirement of acquirability.

The voltage processing circuit is used for conducting an isolation connection loop of the same-name end and the magnetic ring double-inductance in the battery pack isolation acquisition circuit, comparing and processing the isolated voltage and increasing the driving capability of the single-chip microcomputer analog acquisition pin.

As shown in fig. 2, the isolated acquisition circuit includes: the ten groups of isolation units corresponding to the ten batteries are used for a unit circuit, and a first battery detection unit circuit is independently introduced; the first battery detection unit circuit includes: the high-frequency MOS power supply comprises a first battery BT1, a first resistor R9, a second resistor R10, a third resistor R15, a fourth resistor R24, a fifth resistor R25, a sixth resistor R30, a seventh resistor R35, a first tantalum capacitor C5, a first diode D5, a second diode D10, a first homonymous end homonymous ring double-inductor T5 and a first high-frequency MOS switch tube Q5.

The positive electrode of the first battery BT1 is connected with one end of a first resistor R9, the negative electrode of the first battery BT1 is connected with one end of a second resistor R10, the other end of the first resistor R9 is respectively connected with one end of a third resistor R15 and one end of a fourth resistor R24, the other end of the second resistor R10 is respectively connected with the other end of the third resistor R15 and one end of a fifth resistor R25, the other end of the fourth resistor R24 is respectively connected with the positive electrode of a first tantalum capacitor C5 and the negative electrode of a second diode D10, the other end of the fifth resistor R25 is respectively connected with the positive electrode of a first diode D5 and the first common-name end of the second resistor R5, the negative electrode of the first tantalum capacitor C5 is connected with the negative electrode of the first diode D5, the positive electrode of the second diode D10 is connected with the 3 pin of the first common-name end of the second resistor R5, the 1 pin of the first common-name end of the second resistor T5 is connected with one end of a seventh resistor R35, the 2 pin of the first common-name end of the second resistor T5 is connected with the 2 pin of the first resistor T5 and the negative electrode of the first resistor D5, the other end of the fifth resistor R25 is connected with the first MOS transistor Q2, the second MOS is connected with the first MOS transistor Q2, the other end of the MOS is connected with the sixth MOS transistor Q2, and the MOS signal Q is connected with the MOS signal Q1, and the MOS signal Q is connected with the MOS signal Q1.

In this embodiment, the battery pack isolation acquisition circuit may be connected with at most 10 batteries, as shown in fig. 2, where 10 batteries are connected in series, and the positive electrode of the first battery BT1 and the negative electrode of the first battery BT1 represent voltages measured by the first battery, and the negative electrode of the second battery BT2 is connected with the positive electrode of the first battery BT1, so that the voltage measured by the second battery BT2 is equivalent to the voltage measured between the positive electrode of the second battery BT2 and the positive electrode of the first battery BT1, and so on, the voltage measured by the third battery BT3 is equivalent to the voltage measured between the positive electrode of the third battery BT3 and the positive electrode of the second battery BT2 until the voltage measured by the tenth battery BT10 is equivalent to the voltage measured between the positive electrode of the tenth battery BT10 and the positive electrode of the ninth battery BT9, and the hardware circuits detected by each battery are the same; therefore, the detection unit circuit corresponding to the first battery BT1 is described in detail herein, the first resistor R9, the second resistor R10 and the third resistor R15 perform voltage division, so that the voltage value of the first battery BT1 is reduced to about 3V (at this time, the first battery BT1 is the ideal voltage 12V), so that the later-stage circuit is convenient to process, and at this time, the voltages at the two ends of the third resistor R15 are the voltages to be collected; the fourth resistor R24 and the fifth resistor R25 have the functions of current limiting protection, and only allow the current passing through the resistor to be microampere, so that the influence of the detection circuit on the current detection battery is reduced to the greatest extent, and the accelerated aging and attenuation of the battery caused by the formation of a load loop are prevented; because the cathode of the first tantalum capacitor C5 and the cathode of the first diode D5 are connected in series, the voltage between the anode of the first tantalum capacitor C5 and the anode of the first diode D5 is equivalent to the voltage across the third resistor R15, the anode of the voltage across the third resistor R15 passes through the fourth resistor R24, the first tantalum capacitor C5, the first diode D5 and the fifth resistor R25, and then flows back to the cathode of the voltage across the third resistor R15 to form a loop, the first tantalum capacitor C5 is charged in the process, the first diode D5 works by utilizing the leakage current of the first diode D5, the diode leakage current working principle is introduced below, the current flow direction of the diode is from the anode to the cathode under normal conditions, and a certain voltage drop exists, the current flowing is very large, but the current flowing in reverse is not passed if the current flows from negative to positive, which is mainly influenced by the flowing of internal PN power, but only in ideal state, a very small current signal can flow through the diode from negative to positive, only in microampere level, the current is small enough to be ignored, but does exist in the circuit, especially the normal operation of a part of sensitive hardware circuit and an operational amplifier is influenced, here, the leakage current of the first diode D5 is utilized to charge the first tantalum capacitor C5, the capacity value of the first tantalum capacitor C5 can not be too large because the current can only pass through microampere, and the charging time can be influenced by the excessively large current at about 100 nF; the second diode D10 is used for charging the inductor between the 3 pins and the 4 pins of the first homonymous end homonymous magnetic ring double inductor T5 by utilizing leakage current, and the voltage value of the second diode D10 is the voltage of the two ends of the third resistor R15; the inductance effect between the 1 pin and the 2 pin of the first homonymous end homonymous magnetic ring double-inductance is to isolate and output the voltage value loaded at the two ends of the third resistor R15 after waiting for starting the working signal; the seventh resistor R35 has the function of protecting the isolated and collected voltage signal ComFoot from the ground; the sixth resistor R30 has the function of limiting the current of the output signal B1SW of the singlechip; the first high-frequency MOS switch tube Q5 has the function that when the output signal B1SW of the singlechip is at a high level, the 3 pin and the 2 pin of the first high-frequency MOS switch tube Q5 are conducted, so that a loop for GND ground signals is formed, the loop represents the starting of collecting the voltage value of the first battery BT1, and the switching function is realized.

The above introduces the use of the hardware connection structure of the battery pack isolation acquisition circuit and the use of each hardware, and the main function of the battery pack isolation acquisition circuit is to isolate and acquire the voltage value of the corresponding battery so as to enable the singlechip to perform voltage acquisition.

As shown in fig. 3, the voltage processing circuit includes: the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, the first diode D1, the second diode D2, the first high-frequency MOS switch tube Q1, the second high-frequency MOS switch tube Q2, the first capacitor C1, the first operational amplifier OP1A, the second operational amplifier OP2A and the third operational amplifier OP3A.

One end of a second resistor R2 is respectively connected with a ComFoot signal end, a cathode of a first diode D1, an anode of the second diode D2 and one end of an eleventh resistor R11, the other end of the second resistor R2 is respectively connected with a 3 pin of a first high-frequency MOS switch tube Q1, one end of a first capacitor C1 and one end of a third resistor R3, a 2 pin of the first high-frequency MOS switch tube Q1 is respectively connected with the anode of the first diode D1, the other end of the first capacitor C1 and GND signal ground, a 1 pin of the first high-frequency MOS switch tube Q1 is connected with one end of a sixth resistor R6, the other end of the sixth resistor R6 is connected with a PWM_P single chip microcomputer signal, the other end of the third resistor R3 is respectively connected with one end of the first resistor R2 and the 3 pin of a first operational amplifier OP1A, the other end of the first resistor R1 is respectively connected with GND signal ground, the 2 pin of the first operational amplifier OP1A is respectively connected with one end of a seventh resistor R7 and one end of an eighth resistor R8, the other end of the seventh resistor R7 is connected with a 2.5V direct current power supply, the other end of the eighth resistor R8 is respectively connected with the 1 pin of the first operational amplifier OP1A and one end of the fourth resistor R4, the 8 pin of the first operational amplifier OP1A is connected with the 5V direct current power supply, the 4 pin of the first operational amplifier OP1A is connected with the GND signal, the other end of the fourth resistor R4 is connected with the 3 pin of the second operational amplifier OP2A, the 2 pin of the second operational amplifier OP2A is respectively connected with the 1 pin of the second operational amplifier OP2A and one end of the fifth resistor R5, the 8 pin of the second operational amplifier OP2A is connected with the 5V direct current power supply, the 4 pin of the second operational amplifier OP2A is connected with the GND signal, the other end of the fifth resistor R5 is connected with the VoADC single chip analog acquisition signal, the negative electrode of the second diode D2 is connected with the 3 pin of the second high-frequency PWM switching tube Q2, the 2 pin of the second high-frequency switching tube Q2 is connected with the GND signal, the 1 foot of the second high-frequency PWM switching tube Q2 is connected with one end of a ninth resistor R9, the other end of the ninth resistor R9 is connected with an RSW single chip microcomputer signal, the other end of an eleventh resistor R11 is respectively connected with the 2 foot of a third operational amplifier OP3A and the 1 foot of the third operational amplifier OP3A, the 3 foot of the third operational amplifier OP3A is connected with one end of a tenth resistor R10, the 8 foot of the third operational amplifier OP3A is connected with a 5V direct current power supply, the 4 foot of the third operational amplifier OP3A is connected with a GND signal, and the other end of the tenth resistor R10 is connected with a PWM_N single chip microcomputer signal.

In this embodiment, the isolated and collected voltage signal ComFoot obtained from the battery pack isolation and collection circuit in fig. 2 is the voltage source of the collected voltage signal of the battery pack voltage processing circuit in fig. 3, the loop formed by the second resistor R2, the first diode D1, the first high-frequency MOS switch tube Q1, the sixth resistor R6 and the GND signal ground is used in cooperation, when the single chip microcomputer signal pwm_p outputs a high level, the sixth resistor R6 acts to limit the current of the single chip microcomputer signal pwm_p, the 3 pin and the 2 pin of the first high-frequency MOS switch tube Q1 are turned on, the voltage signal ComFoot at this time directly releases the GND signal ground, and meanwhile, the first diode D1 returns the redundant residual voltage to the voltage signal ComFoot to achieve the effect of accelerating the release, so that the voltage signal ComFoot is rapidly reduced to 0V, so that the resistance of the second resistor R2 is less than 100R, otherwise, the effect of the first high-frequency MOS switch tube Q1 is controlled to rapidly break the loop; when the signal PWM_P of the singlechip outputs a low level, the voltage signal ComFoot enters a later-stage hardware circuit, and the first capacitor C1 plays a role in filtering, but the capacity value of the first capacitor C1 is very small and is less than 1nF because of the condition that the voltage is rapidly released in the above, otherwise, the response time of the rapidly released voltage is influenced; the third resistor R3, the first resistor R1, the seventh resistor R7, the eighth resistor R8 and the first operational amplifier OP1A are combined to form a subtracter, the aim of the subtracter is that a voltage signal ComFoot returns an error value in an isolated acquisition loop which is not connected with a battery, the error value is lower than 2V voltage, the error value is filtered by the subtracter, so that an actually acquired voltage signal is obtained, the resistance values of the third resistor R3 and the seventh resistor R7 are the same, the resistance values of the first resistor R1 and the eighth resistor R8 are the same and are twice the resistance values of the third resistor R3 and the seventh resistor R7, and the voltage (the voltage signal ComFoot-2.5V) is obtained at the 1 foot output end of the first operational amplifier OP1A, namely (the voltage signal ComFoot-2.5V) is doubled; the fourth resistor R4 and the second operational amplifier OP2A are combined into a follower, and the main purpose is to shield the influence of the front stage and the rear stage, so that an analog acquisition signal VoADC entering the singlechip is purer and has strong input capability; the second diode D2 functions to prevent the voltage fluctuation caused when the second high frequency PWM switching tube Q2 is operated from returning to the voltage signal comroot; the ninth resistor R9 has the function of limiting the current of the output signal RSW of the singlechip; the second high-frequency PWM switching tube Q2 has the function of being rapidly turned on and off; the tenth resistor R10, the eleventh resistor R11 and the third operational amplifier OP3A form a return difference circuit, the singlechip outputs a signal PWM_N to output a periodic signal, and the periodic signal is matched with the voltage signal ComFoot to drive the magnetic field change of the same-name end same magnetic ring double inductors in the battery pack isolation acquisition circuit of FIG. 2, so that the voltage value of the real and effective voltage signal ComFoot is obtained.

The above introduces the hardware connection structure of the battery pack voltage processing circuit and the use function among the hardware, and the main function of the battery pack voltage processing circuit is to perform signal processing on the isolated acquisition voltage and drive the same-name end same-magnet ring double-inductance output isolated signal mode.

The operation logic of the device is introduced below, in the initial state of the device, ten batteries are respectively connected to each detection loop of the battery pack isolation acquisition circuit, taking the detection unit circuit of the first battery BT1 as an example, when the first battery BT1 is connected to the loop, two ends of the third resistor R15 are divided by the resistor to obtain a voltage source of about 3V to charge the first tantalum capacitor C5, the voltage source loads voltages on the 3 pin and the 4 pin of the first homonymous end homonymous magnetic ring double inductor T5 in a leakage current mode of the second diode D10, but at the moment, the inductance between the 3 pin and the 4 pin of the first homonymous end homonymous magnetic ring double inductor T5 is not measured, because the inductance is equivalent to a wire in the power-on process and is not converted into magnetic flux for isolation operation, the signal B1SW is in a low level, and the 3 pin and the 2 pin of the first high-frequency MOS switch tube Q5 is disconnected; in the battery pack voltage processing circuit, a singlechip signal RSW is high level, residual voltage of a voltage signal ComFoot is released for a long time to enable the residual voltage to be 0V, PWM_P and PWM_N are complementary signals output by the singlechip, PWM_N is high level when PWM_P is low level, PWM_N is low level when PWM_P is high level, the voltage signal ComFoot is released to be 0V, PWM_N is low level, and the closing return difference circuit does not trigger electromagnetic conversion of double inductors of the same-name end same magnetic ring; the device starts to work, the complementary signals PWM_P and PWM_N output by the single chip microcomputer are periodically changed, the output frequency is 20HZ, the period is 50 ms, the duty ratio is 0.1%, namely 50 μs, the specific operation flow is that in the battery pack voltage processing circuit, the single chip microcomputer output signal RSW is low level, the 3 pin and the 2 pin of the second high-frequency MOS switch tube Q2 are disconnected, the voltage signal ComFoot is in a high-resistance state, the PWM_P is low level, the 3 pin and the 2 pin of the first high-frequency MOS switch tube Q1 are disconnected, the voltage value output by the voltage signal ComFoot is waited for being received, the PWM_N is high level, the high-level signal is sent to the voltage signal ComFoot through the return difference circuit, the electromagnetic conversion of the same-name end and the same magnetic ring double inductance is ready to be started, when the voltage of the first battery pack BT1 is detected in the battery pack isolation acquisition circuit, the rest B2SW-B10SW is low level, so that the 2 pin and the 3 pin of the first high-frequency MOS switch tube Q5 are conducted, a loop is formed between the 1 pin and the 2 pin of the first homonymous end magnetic ring double-inductance T5, the high-level signal returned by the return difference circuit triggers the electromagnetic conversion of the first homonymous end magnetic ring double-inductance T5, the voltage between the 3 pin and the 4 pin of the first homonymous end magnetic ring double-inductance T5 can be converted into a magnetic field, then the magnetic field is converted into the inductive voltage between the 1 pin and the 2 pin of the first homonymous end magnetic ring double-inductance T5, the voltage is the voltage signal ComFoot after passing through the seventh resistor R35, the voltage signal ComFoot at the moment is equivalent to the voltage value at the two ends of the third resistor R15, the voltage signal ComFoot is shielded by a subtracter formed by a first operational amplifier OP1A in the battery voltage processing circuit, the output voltage of the 1 pin of the first operational amplifier OP1A is calculated to be (voltage signal ComFoot-2.5V) x 2, the follower formed by the second operational amplifier OP1A is mainly a stable and pure analog acquisition signal for the single chip microcomputer, the single chip microcomputer needs to process the acquisition data at the moment, the voltage of the first battery needs to be calculated to obtain the transformation ratio, the analog signal acquired by the single chip microcomputer is VoADC, the battery voltage is (VoADC/2+2.5) x 4, wherein 4 is the voltage after the transformation ratio coefficient is obtained by 12V/3V, 12V is a battery reference source, and 3V is the voltage after resistor voltage division; the voltage acquisition of the first battery BT1 is completed, and the consumed time is 1 duty cycle, that is, 50 microseconds; then the electric energy of a voltage signal ComFoot is released, a single chip microcomputer signal B1SW is low level in a battery pack isolation acquisition circuit, a 2 pin and a 3 pin of a first high-frequency MOS tube Q5 are disconnected, an isolation acquisition loop is disconnected, single chip microcomputer signals PWM_P and RSW in a battery pack voltage processing circuit are high level, the 2 pin and the 3 pin of a first high-frequency MOS switch tube Q1 and a second high-frequency MOS switch tube Q2 are conducted, so that the voltage signal ComFoot is directly connected with a GND ground signal to enable the voltage to be 0V, meanwhile, the single chip microcomputer signal PWM_N is low level, a closing return difference circuit does not trigger electromagnetic conversion of the same-name end same magnetic ring double inductance, the holding state time of the released voltage signal ComFoot electric energy is 50 milliseconds in one period, and the acquisition time is subtracted by 50 microseconds, and the explanation of the working state in the first period is more than 50 microseconds; and so on, the second battery BT2 is collected when the second period is reached, and the control and the collection are carried out according to the control logic for collecting the first battery BT1, and only the singlechip signal B1SW is changed into the singlechip signal B2 SW; after the tenth battery is collected, the single chip can transmit the collected voltage of the ten batteries to the upper computer through the 485 communication module, and the voltage state of each battery can be seen on the upper computer in real time by using the MODBUS485 protocol for transmission.

It should be understood that the foregoing detailed description of the present utility model is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present utility model, and those skilled in the art should understand that the present utility model may be modified or substituted for the same technical effects; as long as the use requirement is met, the utility model is within the protection scope of the utility model.

Claims

1. The battery pack voltage inspection equipment based on the industrial uninterruptible power supply comprises a series battery pack, an isolation acquisition module, a voltage processing module, a singlechip module, a 485 communication module, an upper computer and a power module; the method is characterized in that: the serial battery pack is connected with the isolation acquisition module, the isolation acquisition module is connected with the voltage processing module, the singlechip module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module, the 485 communication module is connected with the upper computer, and the power module is respectively connected with the isolation acquisition module, the voltage processing module and the 485 communication module.

2. The battery pack voltage inspection device based on an industrial uninterruptible power supply of claim 1, wherein: the isolation acquisition module comprises a plurality of isolation acquisition units, the number of the isolation acquisition units is equal to that of the batteries in the series battery pack, and each battery in the series battery pack corresponds to one isolation acquisition unit;

the isolation acquisition unit comprises a first battery, a first resistor, a seventh resistor, a first tantalum capacitor, a first diode, a second diode, a first homonymous end homonymous magnetic ring double inductor and a first high-frequency MOS switch tube;

the positive pole of first battery is connected one end of first resistance, the negative pole of first battery is connected one end of second resistance, the other end of first resistance is connected with one end of third resistance and one end of fourth resistance respectively, the other end of second resistance is connected with the other end of third resistance and one end of fifth resistance respectively, the other end of fourth resistance is connected with the positive pole of first tantalum electric capacity and the negative pole of second diode respectively, the other end of fifth resistance is connected with the positive pole of first diode and the 4 feet of first homonymous end homonymous magnetic ring double inductance respectively, the negative pole of first tantalum electric capacity is connected with the negative pole of first diode, the positive pole of second diode is connected with the 3 feet of first homonymous end homonymous magnetic ring double inductance, the 1 foot of first homonymous end homonymous magnetic ring double inductance is connected with one end of seventh resistance, the 2 feet of first homonymous end homonymous magnetic ring double inductance are connected with the 3 feet of first high frequency MOS switch tube, the other end of seventh resistance is connected with voltage processing module, the first high frequency MOS switch tube is connected with the six MOS signal pins of first switch module, six MOS module is connected with the other end of first resistance.

3. The battery pack voltage inspection device based on an industrial uninterruptible power supply of claim 1, wherein: the voltage processing module comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a diode D1, a diode D2, a high-frequency MOS switch tube Q1, a high-frequency MOS switch tube Q2, a capacitor C1, an operational amplifier OP1A, an operational amplifier OP2A and an operational amplifier OP3A;

one end of a resistor R2 is respectively connected with an isolation acquisition module, the cathode of a diode D1, the anode of the diode D2 and one end of a resistor R11, the other end of the resistor R2 is respectively connected with a 3 pin of a high-frequency MOS switch tube Q1, one end of a capacitor C1 and one end of a resistor R3, the 2 pin of the high-frequency MOS switch tube Q1 is respectively connected with the anode of the diode D1, the other end of the capacitor C1 and GND signal ground, the 1 pin of the high-frequency MOS switch tube Q1 is respectively connected with one end of a resistor R6, the other end of the resistor R6 is connected with a singlechip module, the other end of the resistor R3 is respectively connected with one end of the resistor R2 and the 3 pin of an operational amplifier OP1A, the other end of the resistor R1 is connected with GND signal ground, the 2 pin of the operational amplifier OP1A is respectively connected with one end of a resistor R8, the other end of the resistor R7 is connected with a 2.5V direct current power supply, the other end of the resistor R8 is respectively connected with the 1 pin of the operational amplifier OP1A and one end of the resistor R4, the 8 pin of the operational amplifier OP1A is connected with a 5V direct current power supply, the 4 pin of the operational amplifier OP1A is connected with GND signal ground, the other end of the resistor R4 is connected with the 3 pin of the operational amplifier OP2A, the 2 pin of the operational amplifier OP2A is respectively connected with the 1 pin of the operational amplifier OP2A and one end of the resistor R5, the 8 pin of the operational amplifier OP2A is connected with the 5V direct current power supply, the 4 pin of the operational amplifier OP2A is connected with GND signal ground, the other end of the resistor R5 is connected with a singlechip module, the cathode of the diode D2 is connected with the 3 pin of the high-frequency PWM switching tube Q2, the 2 pin of the high-frequency PWM switching tube Q2 is connected with GND signal ground, the 1 pin of the high-frequency PWM switching tube Q2 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the singlechip module, the other end of the resistor R11 is respectively connected with the 2 pin of the operational amplifier OP3A and the 1 pin of the operational amplifier OP3A, the 3 pin of the operational amplifier OP3A is connected with one end of a resistor R10, the 8 pin of the operational amplifier OP3A is connected with a 5V direct current power supply, the 4 pin of the operational amplifier OP3A is connected with GND signal ground, and the other end of the resistor R10 is connected with a singlechip module.

4. The battery pack voltage inspection device based on an industrial uninterruptible power supply of claim 1, wherein: the series battery pack includes 10 cells.