CN214252526U - Device for detecting capacity of single-chip polar plate of storage battery - Google Patents
Device for detecting capacity of single-chip polar plate of storage battery Download PDFInfo
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- CN214252526U CN214252526U CN202023038831.8U CN202023038831U CN214252526U CN 214252526 U CN214252526 U CN 214252526U CN 202023038831 U CN202023038831 U CN 202023038831U CN 214252526 U CN214252526 U CN 214252526U
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Abstract
The utility model discloses a device for detecting battery monolithic polar plate capacity, including having a plurality of just, the voltage acquisition device of negative pole sample end, have a plurality of just, the battery charge and discharge machine of negative pole output line, a plurality of just, the negative pole shunt, just, the negative pole shunt all includes the input, the output, connect the definite value resistance between input and output, the positive pole output line is connected with the input of the anodal shunt that corresponds, the negative pole output line is connected with the output of the negative pole shunt that corresponds, voltage acquisition device's positive pole sample end connects gradually to the input of anodal shunt and the input of negative pole shunt, voltage acquisition device's negative pole sample end connects gradually to the output of anodal shunt and the output of negative pole shunt. The utility model discloses a detect the capacity of single polar plate in the battery, make comprehensive judgement to deviations such as single polar plate thickness, weight, be favorable to promoting measurement accuracy.
Description
Technical Field
The utility model belongs to the technical field of lead acid battery, concretely relates to a device for detecting battery monolithic polar plate capacity.
Background
The conventional lead-acid storage battery generally comprises a shell, wherein a plurality of cells are arranged in the shell, and a battery cluster is arranged in each cell, so that a single-cell storage battery is formed. Each cell cluster then comprises a positive plate, a negative plate, a separator disposed between the positive and negative plates, and each cell cluster typically comprises 5 negative plates and 4 positive plates (so-called negative-clad positive), or 5 positive plates and 4 negative plates (so-called positive-clad negative). The positive plate or the negative plate comprises an internal grid and an active substance (diachylon) coated on the grid, the positive plate grid and the negative plate grid are respectively provided with a positive lug and a negative lug which are electrically connected with the outside, and the positive lug or the negative lug are mutually connected in parallel through a busbar.
In the production process, the thickness of the active material applied to the grid may vary, and accordingly, the weight of the individual plates may not be uniform. When the thickness and the weight of the pole plates are uneven, the compression ratio of each single-cell storage battery is easy to be different, namely, when a temporary battery cluster is assembled in a single cell, the situation that the battery cluster is loose or tight exists, the pressure of the single cell is different, the acid absorption amount of the single cell is different, the concentration of sulfuric acid between the pole plates of each pole is unbalanced, and the balance of the voltage of the single cell is difficult.
It can be understood that whether the weight, the thickness and other parameters of the pole plate are uniform or not are detected, so that the design requirement of people is very difficult and troublesome, especially for the assembled storage battery, the outer shell is required to be completely disassembled, the pole plate is taken out for detection, the workload is large, and the thickness of each point of the pole plate has errors, so that the measurement precision can be influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a device for detecting battery monolithic polar plate capacity can conveniently detect the capacity of single check polar plate in the battery to the performance difference that deviation such as single polar plate thickness, weight caused makes comprehensive judgement, avoids the measurement degree of difficulty height that direct measurement polar plate thickness, weight isoparametric exist effectively, problem that measurement accuracy is low.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a device for detecting the capacity of a single polar plate of a storage battery comprises a voltage acquisition device with a plurality of positive sampling ends and a plurality of negative sampling ends, a storage battery charging and discharging machine with a plurality of positive output lines and negative output lines, a plurality of negative shunts and a plurality of positive shunts, wherein each of the negative shunts and the positive shunts comprises an input end, an output end and a fixed value resistor connected between the input end and the output end, the positive output line of the storage battery charging and discharging machine is connected with the input end of the corresponding positive shunt, the negative output line of the storage battery charging and discharging machine is connected with the output end of the corresponding negative shunt, the positive sampling ends of the voltage acquisition device are sequentially connected to the input end of the positive shunt and the input end of the negative shunt, and the negative sampling ends of the voltage acquisition device are sequentially connected to the output end of the positive shunt and the output end of the negative shunt, during detection, the output end of the positive electrode shunt is connected with the positive electrode lug of the positive plate in the storage battery unit cell to be detected, and the input end of the negative electrode shunt is connected with the negative electrode lug of the negative plate in the storage battery unit cell to be detected.
First, the utility model discloses a polar plate capacity detection device includes the voltage acquisition device of measurable voltage, is used for battery charge and discharge machine, a plurality of negative pole shunts and the anodal shunt that have definite value resistance of battery charge and discharge. When the detection is needed, the negative electrode bus bar or the positive electrode bus bar of the battery cluster in the storage battery unit cell to be measured is firstly cut off, so that the positive electrode plates and the negative electrode plates are mutually independent and are not connected in parallel. And then connecting the positive output line of the storage battery charge-discharge machine to the input end of the positive shunt, and sequentially connecting the negative output line of the storage battery charge-discharge machine to the output end of the negative shunt. When the storage battery charging and discharging machine is started to enable the storage battery to start to discharge with the set discharging voltage and discharging current, the voltage on the constant-value resistor in the loop formed by the corresponding positive plate or negative plate can be collected through the voltage collecting device, then the current value of the loop is calculated, and the current value is multiplied by the discharging time to obtain the capacity of the single plate.
That is to say, the utility model discloses avoided the weight that detects the monolithic polar plate and the parameter that thickness etc. are difficult to detect, and changed to the direct current that embodies monolithic polar plate capacity, voltage, discharge time isoparametric, both shown the ground and made things convenient for the detection and can ensure the precision of detection data again.
Preferably, the set discharge current of the storage battery charging and discharging machine is 8A-12A, the set discharge voltage is 1.5V-2.0V, and the set discharge time is 1min-2 min. Further, the set discharge current of the battery charging and discharging machine is 10A, the set discharge voltage is 1.75V, and the set discharge time is 1 min.
Through controlling appropriate discharge current, discharge voltage and discharge time, the accuracy of the detection result is favorably improved, and the detection efficiency is improved.
Preferably, the number of the positive plates and the negative plates in each cell is n, the first positive plate is the negative plate, and the last positive plate is the negative plate, during detection, the positive lugs with the serial numbers of 1 to n-1 are sequentially connected with the output ends of the positive shunts with the serial numbers of 1 to n-1, and the negative lugs with the serial numbers of 2 to n are sequentially connected with the output ends of the negative shunts with the serial numbers of 1 to n-1.
Because the detection data of head and the tail polar plate in the cell have great skew, consequently, when detecting the utility model discloses make the utmost point ear of the positive plate of head and the tail and the negative plate be in the state of opening a way. For example, when the number of the positive and negative electrode plates is 6, only 5 positive electrode plates and 5 negative electrode plates are detected, so that the accuracy and precision of detection can be improved to the maximum extent.
Preferably, the number of the negative electrode shunts and the positive electrode shunts is 5, the constant resistances of the 1 st to 5 th negative electrode shunts are 14.94 milliohm, 15.04 milliohm and 14.76 milliohm in this order, and the constant resistances of the 1 st to 5 th positive electrode shunts are 7.57 milliohm, 7.35 milliohm and 7.56 milliohm in this order.
By properly controlling the resistance value of each constant value resistor, the accuracy of the voltage measurement value on the constant value resistor is improved, and the detection accuracy of the capacity of the single polar plate is further improved.
Therefore, the utility model discloses following beneficial effect has: the capacity of a single polar plate in the storage battery can be conveniently detected, so that the performance difference caused by the deviation of the thickness, the weight and the like of the single polar plate can be comprehensively judged, and the problems of high measurement difficulty and low measurement precision in the process of directly measuring the parameters of the thickness, the weight and the like of the polar plate are effectively solved.
Drawings
Fig. 1 is a schematic view of a connection structure of the polar plate capacity detecting device of the present invention.
In the figure: 1. the device comprises a voltage acquisition device 11, a positive electrode sampling end 12, a negative electrode sampling end 2, a storage battery charge and discharge machine 21, a positive electrode output line 22, a negative electrode output line 3, a positive electrode shunt 31, a fixing strip 4, a negative electrode shunt 41, an input end 42, an output end 5, a storage battery 51, a lug 52, a positive electrode plate 53 and a negative electrode plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, a device for detecting the capacity of a single plate of a storage battery comprises a voltage acquisition device 1, a storage battery charging and discharging machine, a plurality of negative electrode shunts 4, and a plurality of positive electrode shunts 3.
The voltage acquisition device comprises a liquid crystal display screen for displaying detection voltage, a plurality of detection channels, a channel switch selection button for selecting the detection channels, a start button, a stop button and a data storage button, wherein each detection channel comprises a positive electrode sampling end and a negative electrode sampling end which are connected through a lead.
The storage battery charging and discharging machine comprises a liquid crystal display screen for displaying setting program parameters, a voltage setting button, a current setting button, a mode setting button (comprising charging/discharging/standing/ending), a recording condition setting button for selecting the length of recording time, a starting/ending button, a leading-out button for leading out test data, and a plurality of groups of positive output lines and negative output lines for connecting with a storage battery.
Since the voltage acquisition device and the storage battery charging and discharging machine are the prior art, detailed description is not provided in this embodiment.
The negative electrode shunt and the positive electrode shunt have substantially the same structure, and each of the negative electrode shunt and the positive electrode shunt includes an input terminal 41, an output terminal 42, and a constant resistor (not shown in the figure) connected between the input terminal and the output terminal.
The utility model discloses include following step when detecting:
a. opening the upper cover of the shell of the storage battery 5, cutting off the negative bus bar or the positive bus bar of the battery cluster in the single cell to be measured, and leading out each tab 51 by a lead to facilitate the connection at the back;
b. the positive tab of each positive plate 52 is connected in turn to the output of a positive shunt, and the negative tab of each negative plate 53 is connected in turn to the input of a negative shunt. That is, the positive tab, the negative tab, the positive shunt and the negative shunt are numbered as 1, 2 and 3 … … in sequence, and then corresponding serial number connections are installed;
c. sequentially connecting an anode output line 21 of the storage battery charging and discharging machine to the input end of the anode shunt, and sequentially connecting a cathode output line 22 of the storage battery charging and discharging machine to the output end of the cathode shunt;
d. sequentially connecting a positive sampling end 11 of the voltage acquisition device to an input end of a positive shunt and an input end of a negative shunt, and sequentially connecting a negative sampling end 12 of the voltage acquisition device to an output end of the positive shunt and an output end of the negative shunt;
e. starting a discharge mode of the storage battery charge and discharge machine, starting a voltage acquisition device, and displaying and recording discharge voltages corresponding to the positive plates or the negative plates with corresponding serial numbers on each fixed value resistor;
f. and calculating the discharge current of the positive plate or the negative plate with the corresponding serial number according to the discharge voltage and the fixed value resistance, and obtaining the capacity of the single plate according to the discharge current and the discharge time.
It should be noted that the discharge current is equal to the discharge voltage divided by the constant resistance, and the capacity is equal to the discharge current multiplied by the discharge time.
That is to say, the utility model discloses avoided the weight that detects the monolithic polar plate and the parameter that thickness etc. are difficult to detect, and changed to direct embodied monolithic polar plate capacity discharge current, discharge voltage, discharge time isoparametric, both shown the ground and made things convenient for the detection and can ensure the precision of detection data again.
In addition, for convenience of use, the negative electrode shunt and the positive electrode shunt can be provided with two input ends and two output ends, one side, close to the input ends, of each negative electrode shunt can be fixed on one fixing strip 31, one side, close to the output ends, of each negative electrode shunt can be fixed on the other fixing strip, and therefore the whole negative electrode shunt forms a whole. Similarly, the side of each positive electrode shunt close to the input end can be fixed on one fixing strip, and the side of each positive electrode shunt close to the output end can be fixed on the other fixing strip, so that the whole positive electrode shunt forms a whole.
Preferably, in step e, the set discharge current of the battery charging and discharging machine may be set to be between 8A and 12A, in this embodiment 10A, the set discharge voltage may be set to be between 1.5V and 2.0V, in this embodiment 1.75V, and the set discharge time is 1min to 2min, in this embodiment 1 min. Through controlling appropriate discharge current, discharge voltage and discharge time, the accuracy of the detection result is favorably improved, and the detection efficiency is improved.
As a preferable scheme, when the number of the positive plates and the negative plates in a single cell is n, the first positive plate in the single cell is the negative plate, and the last positive plate in the single cell is the positive plate, in the step b, the number of the positive electrode shunts and the number of the negative electrode shunts are n-1, the positive electrode lugs with the serial numbers of 1 to n-1 are sequentially connected with the output ends of the constant value resistors of the positive electrode shunts with the serial numbers of 1 to n-1, and the open circuit state is arranged at the positive electrode lug with the serial number of n; and sequentially connecting the cathode lugs with the serial numbers of 2 to n with the output ends of the constant-value resistors of the cathode shunts with the serial numbers of 1 to n-1, wherein the cathode lug with the serial number of 1 is in an open circuit state.
It can be understood that when the number of the positive plates and the negative plates in the cell is n, the first positive plate and the last negative plate in the cell are n-1, in step b, the number of the positive electrode shunts and the number of the negative electrode shunts are n-1, the positive electrode lugs with the serial numbers of 2 to n are sequentially connected with the output ends of the constant resistors of the positive electrode shunts with the serial numbers of 1 to n-1, and the positive electrode lug with the serial number of 1 is in an open circuit state; and sequentially connecting the cathode lugs with the serial numbers of 1 to n-1 with the output ends of the constant-value resistors of the cathode shunts with the serial numbers of 1 to n-1, wherein the cathode lug with the serial number of n is in an open circuit state.
Because the detection data of the first polar plate in the unit check have a bigger deviation, consequently, the utility model discloses make being in the state of opening a way then of the positive plate and the negative plate of first. For example, when the number of the positive and negative electrode plates is 6, only 5 positive electrode plates and 5 negative electrode plates are detected, so that the accuracy and precision of detection can be improved to the maximum extent.
Further, when the number of the negative electrode shunts and the number of the positive electrode shunts are all 5, the 1 st to 5 th negative electrode shunts have respective constant resistances of 14.94 milliohm, 15.04 milliohm and 14.76 milliohm in this order, and the 1 st to 5 th positive electrode shunts have respective constant resistances of 7.57 milliohm, 7.35 milliohm and 7.56 milliohm in this order. By properly controlling the resistance value of each constant value resistor, the accuracy of the voltage measurement value on the constant value resistor is improved, and the detection accuracy of the capacity of the single polar plate is further improved.
Claims (5)
1. A device for detecting the capacity of a single plate of a storage battery is characterized by comprising a voltage acquisition device with a plurality of positive sampling ends and a plurality of negative sampling ends, a storage battery charging and discharging machine with a plurality of positive output lines and negative output lines, a plurality of negative shunts and a plurality of positive shunts, wherein each of the negative shunts and the positive shunts comprises an input end, an output end and a fixed value resistor connected between the input end and the output end, the positive output line of the storage battery charging and discharging machine is connected with the input end of the corresponding positive shunt, the negative output line of the storage battery charging and discharging machine is connected with the output end of the corresponding negative shunt, the positive sampling ends of the voltage acquisition device are sequentially connected to the input end of the positive shunt and the input end of the negative shunt, and the negative sampling ends of the voltage acquisition device are sequentially connected to the output end of the positive shunt and the output end of the negative shunt, during detection, the output end of the positive electrode shunt is connected with the positive electrode lug of the positive plate in the storage battery unit cell to be detected, and the input end of the negative electrode shunt is connected with the negative electrode lug of the negative plate in the storage battery unit cell to be detected.
2. The apparatus as claimed in claim 1, wherein the discharge current of the battery charger/discharger is set to 8A-12A, the discharge voltage is set to 1.5V-2.0V, and the discharge time is set to 1min-2 min.
3. The apparatus as claimed in claim 2, wherein the discharge current of the battery charger/discharger is set to 10A, the discharge voltage is set to 1.75V, and the discharge time is set to 1 min.
4. The device for detecting the capacity of the single plate of the storage battery as claimed in claim 1, wherein the number of the positive plates and the negative plates in the single cell is n, the first plate is the negative plate, and the last plate is the positive plate, when detecting, the positive lugs with the serial numbers of 1 to n-1 are sequentially connected with the output ends of the positive shunts with the serial numbers of 1 to n-1, and the negative lugs with the serial numbers of 2 to n are sequentially connected with the output ends of the negative shunts with the serial numbers of 1 to n-1.
5. The apparatus as claimed in claim 1, wherein the number of the negative electrode shunts and the positive electrode shunts is 5, the constant resistance values of the 1 st to 5 th negative electrode shunts are 14.94 milliohm, 15.04 milliohm and 14.76 milliohm, and the constant resistance values of the 1 st to 5 th positive electrode shunts are 7.57 milliohm, 7.35 milliohm and 7.56 milliohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023038831.8U CN214252526U (en) | 2020-12-16 | 2020-12-16 | Device for detecting capacity of single-chip polar plate of storage battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023038831.8U CN214252526U (en) | 2020-12-16 | 2020-12-16 | Device for detecting capacity of single-chip polar plate of storage battery |
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| CN214252526U true CN214252526U (en) | 2021-09-21 |
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| CN202023038831.8U Active CN214252526U (en) | 2020-12-16 | 2020-12-16 | Device for detecting capacity of single-chip polar plate of storage battery |
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