JP3663577B2 - Multi-channel meter relay - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a multi-channel meter configured so that a meter relay that turns on or off a contact when various measured values exceed a set upper limit value or lower limit value can be shared by a plurality of channels. Regarding relays.
[0002]
[Prior art]
FIG. 4 is an explanatory diagram of a conventional example, in which a plurality of secondary batteries B1 to Bn are connected in series to a charging / discharging device 40, and charging and discharging of the secondary batteries B1 to Bn are performed by the charging / discharging device 40. When performing and testing the characteristics of the secondary batteries B1 to Bn, meter relays 41-1 to 41-n for measuring the terminal voltage are provided for the secondary batteries B1 to Bn. Each of the meter relays 41-1 to 41-n includes contacts 42-1 to 42-n, and sets an upper limit value or a lower limit value of the voltage when the contacts 42-1 to 42-n are turned off. It can be done. The charging / discharging device 40 is always in an on state, and a loop is formed by the contacts 42-1 to 42-n.
[0003]
During the charge / discharge test, the contact is turned off when the terminal voltage of any secondary battery rises above the set upper limit value or falls below the lower limit value. When any of the contacts is turned off, the charging / discharging device 40 stops the charging / discharging operation for the secondary batteries B1 to Bn because the loop via the contacts 42-1 to 42-n is opened. Thereby, it is possible to prevent danger due to continuing charging and discharging, and to prevent damage to other normal secondary batteries.
[0004]
[Problems to be solved by the invention]
It is necessary to provide meter relays for each of the secondary batteries B1 to Bn that perform charge / discharge tests collectively by the charge / discharge device 40, and set the upper and lower limits for each meter relay and set the measured values. It is a relatively expensive component with a contact or open collector transistor circuit that operates when the value is exceeded. Therefore, there is a problem that a test apparatus for performing a charge / discharge test of a large number of secondary batteries B1 to Bn is expensive and the space is relatively large.
An object of the present invention is to reduce the size and economy by increasing the number of shared parts, and to improve the reliability of operation.
[0005]
[Means for Solving the Problems]
The multi-channel meter relay of the present invention includes (1) measuring contacts S1-1, S1-2,... Sn-1, Sn-2 for connection to a measuring point, and the ON period of the measuring contacts. The scan relay 1 in which a pair of operation confirmation contacts S1, S2,... Sn, which are turned on before, is provided corresponding to the channel, and a divided voltage corresponding to the channel from a connection point where a plurality of resistors R are connected in series. A position dividing voltage output circuit, a divided voltage via the position confirmation contact, and an AD converter 3 for inputting the measured value of the measurement point via the measurement contact and converting them into a digital signal, sequentially In response to the channel, the operation confirmation contact of the scan relay 1 is turned on / off, the measurement contact is turned on / off, and the divided voltage via the operation confirmation contact follows the normal operation sequence. Judgment whether or not there is, and the measured value through the contact for measurement And a determining control processing section 2 whether it is normal.
[0006]
(2) The control processing unit 2 is set by means such as a set input unit 4 and a set selection unit 5 for setting one or both of the upper limit value and the lower limit value of the measurement value in correspondence with the channel. Means for displaying an alarm corresponding to the channel when the measured value exceeds one of the upper limit value and the lower limit value.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory diagram of an embodiment of the present invention. 1 is a scan relay, 2 is a control processing unit, 3 is an AD converter (A / D), 4 is a set input unit, 5 is a set selection unit, 6 Is a display selection unit, 7 is an alarm display unit, 8 is a display panel, 9 is an alarm output unit, 10 is a charging / discharging device, B1 to Bn are secondary batteries, r is a resistance for short circuit prevention, and R is a voltage dividing circuit. The constituting resistors, S1 to Sn, S0 are contact points for operation confirmation, S1-1, S1-2,... Sn-1, Sn-2 are contact points for measurement.
[0008]
The voltage divider circuit outputs a divided voltage corresponding to the number of channels. For example, in the case of a 16-channel configuration, the divided voltage is, for example, 1V, 2V, 3V,. The voltage V and the resistance R are selected. Further, when the number of channels is larger, it is configured to output a divided voltage corresponding to the number of channels. Note that the divided voltage corresponding to the channel is generally the same voltage interval because the resistance R connected in series is generally the same resistance value. However, it is also possible to obtain a divided voltage with different voltage intervals by using different values for the resistors R connected in series.
[0009]
Further, the scan relay 1 includes channel-conforming operation confirmation contacts S1, S2,... Sn and measurement contacts S1-1, S1-2, S2-1, S2-2,. 2 and S0 is a common operation confirmation contact, which is turned on when the operation confirmation contacts S1 to Sn are turned on. Each contact is sequentially turned on and off in correspondence with the channel by the control processing unit 2. For example, the operation check contacts S1 and S0 are turned on and the voltage V of the voltage dividing circuit is input to the AD converter 3. . Next, the same measurement contacts S1-1 and S1-2 as the channel of the operation check contact S1 are turned on, and the terminal voltage of the secondary battery B1 is input to the AD converter 3. Next, the operation check contacts S2 and S0 are turned on, and the divided voltage V (n-1) / n of the voltage dividing circuit is input to the AD converter 3, and then the measurement contacts S2-1 and S2-2 are input. Is turned on, and the terminal voltage of the secondary battery B2 is input to the AD converter 3. Similarly, the on / off of each contact corresponding to the channel is controlled.
[0010]
The set input unit 4 has a configuration for setting an upper limit value and a lower limit value of measurement values, and the set selection unit 5 selects channels to be measured, and generally selects all channels. However, any channel can be selected not to measure. The display selection unit 6 selects a channel for displaying the measurement value. The alarm display section 7 is displayed for each channel. For example, when the measured value exceeds the upper limit value or the lower limit value, the alarm display section 7 is continuously lit. Display can be enabled. The display panel 8 displays the measured values of the selected channel. The alarm output unit 9 performs the same operation as the output from the contact point of the meter relay, and inputs an alarm signal to the charging / discharging device 10 in the alarm display state.
[0011]
FIG. 2 is a diagram for explaining the operation of the embodiment of the present invention. S1, S2,... Sn are contact points for checking the operation of the scan relay 1, S1-1, S2-1, and Sn-1 are contact points for measurement. Dn, D2,... Dn are judgment outputs, G is good, and NG is bad.
[0012]
In the first scan cycle, when the operation check contacts S1 and S0 of the scan relay 1 are turned on, the control processing unit 2 is normal if the voltage from the voltage dividing circuit indicates the applied voltage V ± α. When the terminal voltage of the secondary battery B1 is measured by turning on the measurement contacts S1-1 and S1-2 and then measuring the terminal voltage of the secondary battery B1, the set upper limit value or lower limit value is not exceeded. In this case, good G is set and the determination output is set to good G. Α can be set to a value of about 5% to 1% of the applied voltage V in accordance with the stability of the applied voltage V, the accuracy of the resistance R, and the like.
[0013]
Next, if the operation check contacts S2 and S0 are turned on and the voltage from the voltage dividing circuit indicates V (n-1) / n ± α as described above, the normal order is obtained. Then, the measurement contacts S2-1 and S2-2 are turned on, the terminal voltage of the secondary battery B2 is measured, and if the set upper limit value or lower limit value is not exceeded, it is determined as good G and the determination output Is good G. Similarly, if the voltage when the operation confirmation contact Sn is turned on indicates V / n ± α, it is determined as good G in a regular order, and the measurement contacts Sn-1 and Sn-2 are The terminal voltage of the secondary battery Bn is measured by the ON control, and when the set upper limit value or lower limit value is not exceeded, it is determined as good G, and the process proceeds to the next cycle.
[0014]
In the next cycle, when the operation check contacts S1 and S0 are turned on, for example, if the divided voltage is not within the range of V ± α, the operation is not performed in the normal order. judge. In this case, even if the measurement value when the measurement contacts S1-1 and S1-2 are turned on is good G that does not exceed the upper limit value or the lower limit value, the determination output D1 is determined as defective NG. Further, when the operation check contacts S2 and S0 are turned on, it is determined that the order is normal, and even when the good G is determined, the measured value when the next measurement contacts S2-1 and S2-2 are turned on is the upper limit value or When it is determined as defective NG due to exceeding the lower limit value, the determination output D2 is determined as defective NG.
[0015]
In this case, since the operation confirmation contact S1 is turned on at the beginning of the scan cycle and the operation confirmation contact Sn is turned on last, the divided voltage of the voltage dividing circuit selected by the operation confirmation contact is gradually decreased. It changes to become. Therefore, when the divided voltage decreases in a predetermined order, it is determined that the contacts are operating in a regular order. Contrary to the case described above, in the order that the operation confirmation contact Sn is turned on at the beginning of the scan cycle and the operation confirmation contact S1 is turned on at the end, the divided voltages selected by the operation confirmation contact are sequentially changed. It changes to be higher. Therefore, when the divided voltage increases in a predetermined order, it can be determined that the contacts are operating in a regular order.
[0016]
In addition, if a divided voltage that does not follow the normal order is detected, this indicates that the scan relay 1 is not operating normally, and the measured value when the measuring contact is turned on may be measured at another measuring point. Since it is high, it is determined as defective NG. Therefore, the reliability of the operation of the scan relay 1 can be improved. In FIG. 1, when the above-mentioned failure NG occurs, an alarm signal is sent from the alarm output unit 9 to the charging / discharging device 10 to stop the operation of the charging / discharging device 10, and the secondary batteries B1-Bn The charge / discharge test can be stopped.
[0017]
FIG. 3 is an explanatory diagram of the operation panel display panel. The outline of the configuration having the functions of the set input unit 5, the set selection unit 5, the display selection unit 6, the alarm display unit 7 and the display panel 8 of FIG. Show. That is, SEL indicates a selection switch for channels 1 to n constituting the display selection unit 6, and VOLT indicates a digital voltmeter constituting the display panel 8. HiSET, LoSET, and ENT indicate an upper limit value setting switch, a lower limit value setting switch, and an input confirmation switch that constitute the set input unit 4. Note that the upper limit value setting switch and the lower limit value setting switch can have a multi-digit rotary switch configuration.
[0018]
The ALM has a display element such as a light emitting diode corresponding to the channels CH1 to CHn constituting the alarm display unit 7, and the upper limit value or lower limit value is determined by comparing the measured value in the control processing unit 2 with the upper limit value or the lower limit value. When the value is exceeded, the display element corresponding to the channel is turned on. If the scanner relay 1 is defective NG, it can be displayed blinking. In addition, the switch corresponding to the channels CH1 to CHn indicates that the measurement corresponding to the channel is turned on when the switch is turned to the upper side ON, and that the corresponding channel is not measured when the switch is set to the neutral position OFF. In addition, when the switch is moved down to the lower side SET, the upper limit value or lower limit value corresponding to the channels CH1 to CHn is set.
[0019]
The above-described upper limit value or lower limit value can be set when only one switch is tilted to the SET side. At that time, the upper limit value and lower limit value of the previous setting contents are displayed on the display panel 8. Are alternately displayed at a predetermined cycle such as 1 second. Then, the upper limit value and the lower limit value are set by HiSET and LoSET, and the setting for the channel is completed by pressing the input confirmation switch. Therefore, an upper limit value or a lower limit value can be set for each channel.
[0020]
It is also possible to adopt a configuration in which a plurality of switches are tilted to the SET side and a common upper limit value and lower limit value are set for the corresponding channel. For example, when all the secondary batteries B1 to Bn have the same characteristics, the terminal voltage and the upper limit value and the lower limit value thereof can be handled as the same, so that the channels CH1 to CHn can be set in common. It is. The end of the setting mode is when all the switches corresponding to the channel are turned on or off. If there are any switches that are turned on, the measurement for the corresponding channel is started.
[0021]
Although the above-mentioned embodiment shows the case of the multi-channel type meter relay applied at the time of the test of the charge / discharge characteristics of the secondary batteries B1 to Bn, the measurement point for connecting the measurement contact is another type of measurement point, For example, using the outputs of sensors such as flow rate, pressure, current, temperature, etc. as measurement points, it is determined whether or not a set upper limit value or a set lower limit value has been exceeded for a plurality of measurement points via the scan relay 1 and the protection means is activated And alarm generation means can be activated.
[0022]
【The invention's effect】
As described above, the present invention uses the voltage such as the terminal voltage of the secondary batteries B1 to Bn or the output of a sensor such as current, temperature, pressure, and flow rate as a measurement point to connect to the measurement point. Scan relay 1 in which a set of measurement contacts S1-1, S1-2,... Sn-1, Sn-2 and operation check contacts S1, S2,. A voltage dividing circuit for position confirmation, an AD converter 3, and a control processing unit 2. The AD converter 3 includes a divided voltage via the position confirmation contact and a measurement point via the measurement contact. The measured value is converted into a digital signal and input to the control processing unit 2, and the control processing unit 2 sequentially turns on / off the operation confirmation contact of the scan relay 1 corresponding to the channel, and then performs measurement. ON / OFF control of the contact for contact, and the divided voltage via the operation check contact is positive In the conventional example in which a meter relay is provided for a plurality of channels, it is determined whether or not the measured value via the measuring contact is normal. In comparison, there are many shared parts, and the size and economy can be reduced. In addition, the scan relay 1 is used to sequentially input the measurement values corresponding to each channel, but the operation confirmation can be performed using the operation confirmation contacts S1 to Sn of the scan relay 1, so that the time division is performed. The reliability of the measurement performed automatically can be improved.
[0023]
Further, means such as the set input unit 4 and the set selection unit 5 for setting one or both of the upper limit value and the lower limit value of the measured value to correspond to the channels CH1 to CHn, and the upper limit value and the lower limit value set by this means. It is possible to set measurement conditions for any channel as a multi-channel meter relay by means such as the alarm display unit 8 that displays a channel-compatible alarm when the measured value exceeds either of the above. When the measured value exceeds the set condition, an alarm can be displayed.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an embodiment of the present invention.
FIG. 2 is an operation explanatory diagram of the embodiment of the present invention.
FIG. 3 is an explanatory diagram of an operation display panel.
FIG. 4 is an explanatory diagram of a conventional example.
[Explanation of symbols]
1 Scan Relay 2 Control Processing Unit 3 AD Converter (A / D)
4 set input unit 5 set selection unit 6 display selection unit 7 alarm display unit 8 display panel 9 alarm output unit r resistance R for short-circuit prevention resistors S1 to Sn, S0 contacts for operation check S1-1, S1- 2-Sn-1, Sn-2 contact for measurement

Claims (2)

A scan relay in which a set of a measurement contact for connecting to a measurement point and an operation check contact that is turned on before the on-period of the measurement contact is provided for the channel;
A voltage dividing circuit for position confirmation that outputs a divided voltage corresponding to a channel from a connection point in which a plurality of resistors are connected in series;
An AD converter that inputs the divided voltage via the position confirmation contact and the measurement value of the measurement point via the measurement contact and converts them into a digital signal;
For the sequential channel, the operation confirmation contact of the scan relay is turned on / off, the measurement contact is turned on / off, and the divided voltage via the operation confirmation contact is in a normal operation order. A multi-channel meter relay comprising: a control processing unit that determines whether or not the measured value is normal, and determines whether or not the measured value through the measurement contact is normal. The control processing unit is configured to set one or both of an upper limit value and a lower limit value of a measurement value corresponding to a channel, and measure either the upper limit value or the lower limit value set by the means. The multi-channel meter relay according to claim 1, further comprising means for displaying an alarm corresponding to the channel when the value exceeds.

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