A kind of accumulator on-line monitoring system
Technical field
The utility model belongs to battery management technical field, is specifically related to a kind of accumulator on-line monitoring system.
Background technology
Current China machine room standby power supply used is substantially all valve controlling type accumulator, and the factors such as the installation of accumulator, daily servicing, discharge and recharge number of times and size of current, charging rectifier module and operating ambient temperature are all affecting accumulator capacity, life-span and power supply capacity constantly.And when there is power breakdown, UPS powers to ensure urgent electricity consumption by battery pack to critical loads, therefore battery pack is link the weakest in whole backup system.
According to source investigation display, all caused by battery malfunction up to the UPS fault of 80%; Nearly the accumulator of 5% can break down within quality guarantee period; Cell batteries can be backward within one day; Whole group storage battery performance is determined by the poorest accumulator; Single trouble accumulator can cause whole electric battery and lose efficacy; The service lifetime of accumulator of 8 years designed lives is general less than 4 years.
Monitoring system traditional at present generally only provides the monitoring of battery pack or single battery voltage, and the monitoring of voltage can help user to find behindhand battery usually in battery discharging process, but is difficult to find behindhand battery under floating charge state.Namely existing monitoring system is difficult to ensure Timeliness coverage behindhand battery and change, and in actual discharge process, behindhand battery is larger on electric battery impact, is a danger for whole power-supply system.
Utility model content
The purpose of this utility model adopts low discharging current to carry out high-precision accumulator internal resistance measurement, overcomes existing storage battery monitoring system and adopt heavy-current discharge to reduce the life of storage battery and cannot carry out the shortcoming of internal resistance measurement at least once-a-day;
For this reason, the utility model provides a kind of accumulator on-line monitoring system, comprises the CPU (central processing unit) of battery pack and the whole observation process of control, also comprises collecting unit and control module, described battery pack has one group at least, and often group is in series by multiple single battery; Described collecting unit is by communication bus link control module, and the voltage signal of each single battery that collecting unit is collected by described control module and resistance signal deliver to CPU (central processing unit) through communication bus transmission line.
Described collecting unit has several, each collecting unit is connected mutually by communication bus, each collecting unit is provided with seven connecting lines, comprising two power leads and five signal line, the signal intensity of five signal line to three or four single battery two ends gathers;
Described collecting unit comprises the first path selection switch and alternate path selector switch, described first path selection switch is connected with differential amplifier by wave filter, described differential amplifier is connected by the input end of integrator with an AD conversion module, and the output terminal of an AD conversion module is connected with the first central processing unit; Described alternate path selector switch is connected with the input end of an AD conversion module, and the output terminal of an AD conversion module is connected with the first central processing unit.
Be provided with third path selector switch in described control module, described third path selector switch is connected with amplifier, and described amplifier is connected with the input end of the 2nd AD conversion module, and the output terminal of described 2nd AD conversion module processes with the second central authorities and is connected.
A maximum control linkage of control module 254 collecting units, have at most between 64 control modules and mutually connect, and first collecting unit are connected with last control module.
The current path of described battery pack is provided with current sensor, and current signal is also sent to control module by the electric current on described current sensor monitoring current path; Control module is circumscribed with temperature sensor, and the temperature signal measured by it is sent to control module by described temperature sensor.
LED warning indicator light and hummer is electrically connected with in circuit in described collecting unit.
Described central control unit is connected with remote monitoring unit by network.
The beneficial effects of the utility model: this accumulator on-line monitoring system that the utility model provides, low discharging current is adopted to carry out high-precision accumulator internal resistance measurement, overcome existing storage battery monitoring system adopt heavy-current discharge to reduce the life of storage battery and the shortcoming of internal resistance measurement at least once-a-day cannot be carried out, the scale of system can be expanded by the more collecting unit of series connection or more control module in parallel, thus reach the object of the more accumulators of measurement, compatible and extendability is fabulous, without the need to correcting and manually adjustment, engineering staff can be helped to save time, the reasonable arrangement progress of work, user's Timeliness coverage fail battery can be helped, carry out targetedly safeguarding and changing, thus avoid the large scale investment that single fail battery causes battery failure and then integral replacing electric battery, significantly can reduce the touch opportunity of personnel and battery, thus the danger having ensured personal security and avoided occurring human operational error and cause.
Below with reference to accompanying drawing, the utility model is described in further details.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of the accumulator on-line monitoring system that the utility model provides.
Fig. 2 is the fundamental diagram of acquisition module.
Fig. 3 is the fundamental diagram of control module.
Description of reference numerals: 1, CPU (central processing unit); 2, temperature sensor; 3, current sensor; 4, control module; 5, collecting unit; 6, battery pack; 7, the first path selection switch; 8, alternate path selector switch; 9, wave filter; 10, differential amplifier; 11, integrator; 12, an AD conversion module; 13, the first central processing unit; 14, discharge circuit; 15, third path selector switch; 16, amplifier; 17, the 2nd AD conversion module; 18, the second central processing unit.
Embodiment
Embodiment 1:
Cannot the defect of Timeliness coverage behindhand battery for overcoming existing Monitored System of Industrial Storage Cell, present embodiments provide a kind of accumulator on-line monitoring system, as shown in Figure 1, comprise the CPU (central processing unit) 1 of battery pack 6 and the whole observation process of control, store BATTWATCH software in described CPU (central processing unit) 1, CPU (central processing unit) 1 stores all data collected, and carries out detection and display alarm state, this CPU (central processing unit) 1 can use PC, also can be PAD, aobvious control handle etc.In addition, also comprise collecting unit 5 and control module 4, wherein: described battery pack 6 has one group at least, and often group is in series by multiple single battery; Described collecting unit 5 is by communication bus link control module 4, and communication bus comprises the modes such as optical fiber, RS485, RS422, wireless transmission.The voltage signal of each single battery that collecting unit 5 is collected by described control module 4 and resistance signal are delivered to CPU (central processing unit) 1 through communication bus, electromagnetic noise impact can be reduced to greatest extent, avoid causing battery short circuit dangerous, install and use safer.Described collecting unit 5 has several, each collecting unit 5 is connected mutually by communication bus, each collecting unit 5 is provided with seven connecting lines, comprising two power leads and five signal line, the signal intensity of five signal line to three or four single battery two ends gathers; A control module 4 connects 254 collecting units 5 at most, have at most between 64 control modules 4 and mutually connect, and first collecting unit 5 is connected with last control module 4.
As shown in Figure 2, the fundamental diagram of the collecting unit 5 that the utility model provides, described collecting unit 5 comprises the first path selection switch 7 and alternate path selector switch 8, described first path selection switch 7 is connected with differential amplifier 10 by wave filter 9, described differential amplifier 10 is connected with the input end of an AD conversion module 12 by integrator 11, and the output terminal of an AD conversion module 12 is connected with the first central processing unit 13; Described alternate path selector switch 8 is connected with the input end of an AD conversion module 12, and the output terminal of an AD conversion module 12 is connected with the first central processing unit 13.
Signal wire can gather voltage signal and resistance signal, when collecting voltage signal, because a collecting unit 5 can gather three or four single batteries, need to select the single battery that will gather by alternate path selector switch 8, the voltage signal of this single battery collected is sent to an AD conversion module 12, one AD conversion module 12 is converted into digital signal simulating signal, what this digital signal was sent to collecting unit 5 is the first central processing unit 13, this first central processing unit 13 sends control module 4 to voltage signal, via control module 4, voltage signal is sent to CPU (central processing unit) 1, when signal wire collects resistance signal, by alternate path selector switch 8 select signal wire collection need carry out by discharge circuit 14 single battery that discharges, the signal of this single battery after overdischarge carries out frequency-selecting by wave filter 9, allow useful signal is zero-decrement as far as possible to be passed through, the decay large as far as possible to garbage signal, then process is amplified through differential amplifier 10 pairs of resistance signals, integration is carried out again through integrator 11 pairs of resistance signals, resistance signal after integration is through an AD conversion module 12, simulating signal is converted into digital signal, this digital signal is sent in the first central processing unit 13 of collecting unit 5 and processes, resistance signal after process is sent to CPU (central processing unit) 1 through control module 4, CPU (central processing unit) 1 stores all data collected, and detect.
Conveniently user finds fail battery timely and accurately, LED warning indicator light and hummer is electrically connected with in circuit in described collecting unit 5, when there is difference in battery, LED warning indicator light is luminous, hummer is sounded a buzzer, if there is chimes of doom, show behindhand battery, user can find behindhand battery in time according to LED and hummer, discharges obstacle.
This accumulator on-line monitoring system can monitor the accumulator of any amount and free voltage (2V/6V/8V/12V/16V) in a system simultaneously, compatible and extendability is fabulous, because a control module 4 connects 254 collecting units at most, when collecting unit 5 is more than 254, need to increase control module 4, mutually connect between multiple control module 4.
This accumulator on-line monitoring system that the present embodiment provides can the state of each single battery of Real-Time Monitoring, client is by up-to-date cell batteries Monitoring Data every day, can find timely and accurately, hidden danger of fixing a breakdown battery, carry out targetedly safeguarding and changing, thus avoid the large scale investment that single fail battery causes battery failure and then integral replacing electric battery, ensure the safety of important backup power system.
Embodiment 2:
In order to detect the discharge process of battery pack 6, and the transition temperature of accumulator and ambient temperature, the current path of described battery pack 6 is provided with current sensor 3, and current signal is also sent to control module 4 by the electric current on described current sensor 3 monitoring current path; Control module 4 is circumscribed with temperature sensor 2, and the temperature signal measured by it is sent to control module 4 by described temperature sensor 2.As shown in Figure 3, the circuit working schematic diagram of the control module 4 that the utility model provides, described control module 4 comprises third path selector switch 15, described third path selector switch 15 is connected with amplifier 16, described amplifier 16 is connected with the input end of the 2nd AD conversion module 17, and the output terminal of described 2nd AD conversion module 17 is connected with the second central processing unit 18.
Current signal or temperature signal is selected by third path selector switch 13, signal amplifies through amplifier 16 by current signal or temperature signal, through the 2nd AD conversion module 17, simulating signal is converted into digital signal again, digital signal after being converted processes through the second central processing unit 18 of control module 4, signal after process is sent to CPU (central processing unit) 1, CPU (central processing unit) 1 stores all data collected, and detects.
Conveniently user's remote monitoring accumulator situation, described CPU (central processing unit) 1 is connected with remote monitoring unit by network, thus complete remote monitoring and third party is integrated, understand battery-operated state whenever and wherever possible, significantly can reduce the touch opportunity of personnel and battery, thus the danger having ensured personal security and avoided occurring human operational error and cause.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.