CN218213189U - Electric energy meter circuit convenient for measuring battery life - Google Patents
Electric energy meter circuit convenient for measuring battery life Download PDFInfo
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- CN218213189U CN218213189U CN202221504336.8U CN202221504336U CN218213189U CN 218213189 U CN218213189 U CN 218213189U CN 202221504336 U CN202221504336 U CN 202221504336U CN 218213189 U CN218213189 U CN 218213189U
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Abstract
The utility model relates to a conveniently carry out battery life measuring electric energy meter circuit, including battery BT1, super capacitor C1 and supply circuit V1, battery BT1, super capacitor C1, supply circuit V1 be connected through competition and electronic circuit such as main MCU. And a short-circuit point CB1 used for measuring the service life of the battery under the condition that the power supply circuit V1 is powered off is arranged between the outputs of the battery BT1 and the super capacitor C1. Compared with the prior art, the utility model has the advantages of battery life measures more accurate swift, the design is simpler, production is more convenient.
Description
Technical Field
The utility model relates to an electric energy meter supply circuit especially relates to a conveniently carry out battery life measuring electric energy meter circuit.
Background
In the current national grid electric energy meter design, a battery for power failure display and a super capacitor for supplying power to a real-time clock under the condition of undervoltage of the battery are designed. In the requirement of national grid, the battery of the electric energy meter can keep the electric energy meter working for 5 years under the condition of power failure. If the requirement of 5 years is met, a longer time is needed in the actual test. Nor is there a test method given in the standard how to perform a 5 year life of the battery.
Through retrieval, the patent "method for monitoring the battery power consumption of an electric energy meter" (patent application No. CN 104678314A) and the patent "automatic monitor for the battery power consumption of an electric energy meter and use method" (No. CN 104833942B) propose that a fixed divider resistor is added on a battery circuit, and the battery power consumption of the electric energy meter is judged by sampling the voltage at two ends of the divider resistor. However, for a specific electric energy meter, there may be wake-up and the like during the sleep, and the current passing through the wake-up and wake-up processes is different. This method is not necessarily accurate.
The patent 'an accelerated test system and method for the service life of a single-phase electric energy meter battery' (No. CN 105044614B) induces an inner processor of the electric energy meter to operate in a high-power consumption state by simulating complex working conditions such as a power failure and recovery event, different temperatures and humidity and the like under a real-load working condition, accelerates the discharge process of the battery, obtains a battery service life accelerated test value, and is used for evaluating the service life of the single-phase electric energy meter battery under a field operation environment. However, the method for judging the energy consumption of the electric energy meter in the normal sleep state by using the energy consumption of the electric energy meter in the sleep stage has no strict scientific basis.
The patent "a test method of intelligent ammeter clock battery performance based on operating mode simulation" (No. CN 106019167B), proposes to collect and measure the static power consumption of the ammeter; acquiring and measuring the dynamic power consumption of the electric energy meter; and respectively establishing a data model and a data chart for the static power consumption data and the dynamic power consumption data obtained by measurement, and respectively analyzing and calculating the service life of the battery on the electric energy meter. But there is no description of how to measure the static power consumption and the dynamic power consumption of the electric energy meter.
The method for measuring the power consumption of the current electric energy meter under the condition of power failure generally adopts the mode of fig. 1. Short-circuit points for testing are reserved on the circuit board. When the electric energy meter is normally used, the two short-circuit points are respectively in short circuit, and the super capacitor C1 and the battery BT1 work normally. When the power of the battery needs to be tested, the CB1 and the CB2 are disconnected, the super capacitor is prevented from supplying power to the chip, a resistor is connected between two terminals of the CB2, the current of the electric energy meter is calculated according to the voltage detected at two ends of the resistor under the condition of power failure, and the working time under the condition of power failure is calculated according to the capacity of the battery BT 1. In fig. 1, C1 is a supercapacitor and BT1 is a battery. Under the condition of no power failure, the V1 supplies power to the electric energy meter. Under the condition of power failure, the super capacitor and the battery supply power for the electric energy meter.
There are two disadvantages to such a circuit. One of the problems is that the consumed current of the electric energy meter is not constant under the condition of power failure, so that when the consumed current is measured, if the resistance between CB2 is too small, the voltage at two ends of the resistance is too small, and the voltage is difficult to detect; if the connected resistor is too large, the voltage at two ends of the resistor is too large when the consumption current of the electric energy meter is large, the power supply voltage of the electric energy meter chip is too small, the normal work of the electric energy meter chip can be influenced, and errors are brought to measurement. And the other is that two terminals need to be short-circuited in normal production, so that the workload is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric energy meter circuit that conveniently carries out battery life measurement in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
according to the utility model discloses an aspect provides a conveniently carry out battery life measuring electric energy meter circuit, including battery BT1, super capacitor C1 and supply circuit V1, parallelly connected back output and the electronic circuit connection such as main MCU of battery BT1 and super capacitor C1, supply circuit V1, battery BT1 and super capacitor C1's output between be equipped with and be used for conveniently carrying out battery life measuring short circuit point CB1.
As a preferential technical scheme, the battery BT1 is detachably connected in an electric energy meter circuit.
As a preferred technical scheme, the output end of the super capacitor C1 is connected with the electric energy meter through a diode D1.
As a preferred technical solution, the output end of the battery BT1 is connected to the electric energy meter through a diode D3.
As a preferred technical solution, the output end of the power supply circuit V1 is connected to the electric energy meter through a diode D2.
As a preferred technical solution, the circuit further includes a voltage measuring unit disposed at two ends of the super capacitor C1.
As a preferential technical scheme, the voltage measuring unit is a multimeter.
Compared with the prior art, the utility model discloses the effectual operation through a period of circuit and measuring method measures the average current of electric energy meter under the power failure condition, can obtain the accurate life-span of electric energy meter battery. And the circuit design of the electric energy meter is simpler, short-circuit operation is not needed under the production condition, and the production is more convenient.
Drawings
FIG. 1 is a detailed circuit diagram of a conventional circuit;
fig. 2 is a specific circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
As shown in FIG. 2, the electric energy meter circuit convenient for measuring the service life of the battery comprises a battery BT1, a super capacitor C1 and a power supply circuit V1, wherein the output end of the battery BT1, the super capacitor C1 and the power supply circuit V1 are connected in parallel and then connected with an electronic circuit such as a main MCU, and a short-circuit point CB1 used for short-circuit under the condition that the power supply circuit V1 is powered off and under the condition that the service life of the battery needs to be measured is arranged between the outputs of the battery BT1 and the super capacitor C1.
The battery BT1 is detachably connected in the electric energy meter circuit.
And the output end of the super capacitor C1 is connected with an electronic circuit such as a main MCU (microprogrammed control Unit) through a diode D1. The output end of the battery BT1 is connected with an electronic circuit such as a main MCU and the like through a diode D3. The output end of the power supply circuit V1 is connected with an electronic circuit such as a main MCU through a diode D2.
A short contact is provided between the supercapacitor C1 and the output of the battery BT 1. When the electric energy meter normally works, the short contact is not short-circuited. Under the condition of power failure, the super capacitor and the battery supply power to the electric energy meter through competition.
When the service life of the battery of the electric energy meter needs to be measured, the electric energy meter is powered off, the battery BT1 is detached (the battery can be conveniently detached and replaced in the electric energy meter requirement of the national power grid), the CB1 is in short circuit, the super capacitor C1 supplies power to the electric energy meter chip, and the electric energy meter works in a normal dormant state. At this time, the voltage at the two ends of the super capacitor C1 is measured (universal meters and other tools can be used), after a period of time (possibly 10 hours), the voltage at the two ends of the super capacitor C1 is measured again, and the consumed current of the electric energy meter under the power failure condition is calculated according to the two voltage differences. The life of the battery in the case of power outage is then calculated from the capacity of the battery BT 1.
The calculation formula is as follows:
T＝Cbt/(C1*(U1-U2)/t)
wherein Cbt is the battery capacity and the unit is Ah;
c1 is the super capacitor capacity, and the unit is F (farad);
u1 and U2 are the voltage at two ends of the capacitor when the test is started and ended respectively, and the unit is V (volt);
t is the time consumed by the test respectively, and the unit is second;
t is the battery life in h (hours).
The utility model discloses the effectual operation through short period of time of circuit measures the average power consumption of electric energy meter under the power failure condition, obtains the accurate life-span of electric energy meter battery (can be used for judging whether to exceed 5 years). And the circuit design of the electric energy meter is simpler, short-circuit operation is not needed under the production condition, and the production is more convenient.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The electric energy meter circuit convenient for measuring the service life of the battery comprises a battery BT1, a super capacitor C1 and a power supply circuit V1, wherein the output end of the battery BT1, the super capacitor C1 and the power supply circuit V1 are connected in parallel and then connected with an electronic circuit such as a main MCU (microprogrammed control unit), and the electric energy meter circuit is characterized in that a short circuit point CB1 used for conveniently measuring the service life of the battery is arranged between the outputs of the battery BT1 and the super capacitor C1.
2. The electric energy meter circuit convenient for battery life measurement according to claim 1, wherein the battery BT1 is detachably connected in the electric energy meter circuit.
3. The electric energy meter circuit for facilitating battery life measurement according to claim 1, wherein the output end of the super capacitor C1 is connected to the electric energy meter through a diode D1.
4. The electric energy meter circuit convenient for battery life measurement according to claim 1, wherein the output terminal of the battery BT1 is connected to the electric energy meter through a diode D3.
5. The electric energy meter circuit convenient for battery life measurement according to claim 1, wherein the output end of the power supply circuit V1 is connected with the electric energy meter through a diode D2.
6. An electric energy meter circuit facilitating battery life measurement according to claim 1, characterized in that the circuit further comprises a voltage measuring unit arranged across the supercapacitor C1.
7. The electric energy meter circuit convenient for battery life measurement according to claim 6, wherein the voltage measuring unit is a multimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221504336.8U CN218213189U (en) | 2022-06-15 | 2022-06-15 | Electric energy meter circuit convenient for measuring battery life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221504336.8U CN218213189U (en) | 2022-06-15 | 2022-06-15 | Electric energy meter circuit convenient for measuring battery life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218213189U true CN218213189U (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221504336.8U Active CN218213189U (en) | 2022-06-15 | 2022-06-15 | Electric energy meter circuit convenient for measuring battery life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218213189U (en) |
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2022
- 2022-06-15 CN CN202221504336.8U patent/CN218213189U/en active Active
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