CN212845813U - Device for detecting abnormal cells of storage battery - Google Patents

Abstract

The utility model discloses a device for detecting abnormal single cells of storage batteries, the device comprises a bottom plate for placing the storage batteries to be detected and a mounting plate arranged above the bottom plate, a liftable detection plate is arranged below the mounting plate, a plurality of detection probes for puncturing a battery cover and contacting each direct-connected busbar of the storage batteries and detection probes respectively contacting with the positive terminal and the negative terminal of the storage batteries are arranged on the detection plate; the device also comprises a detection circuit led out from the detection probe and the detection probe, and a voltmeter used for detecting each unit cell voltage. The utility model discloses the device is through setting up test probe, and test probe directly punctures the battery cover and switches on with directly linking the busbar when detecting, need not dissect the battery during the detection, can conveniently carry out the detection of each single check utmost point crowd voltage to the lead accumulator who links the busbar structure fast, improves detection efficiency.

Description

Device for detecting abnormal cells of storage battery

Technical Field

The utility model relates to a battery testing technology field especially relates to a device for detecting battery abnormal single check.

Background

Lead-acid batteries generally comprise a plurality of cells, each cell having a group of poles connected in series to obtain a higher output voltage. The lead storage battery has the defect that the service life of the whole battery is influenced because the unit cells of the lead storage battery fall behind due to various reasons in the use process.

After such a defective battery is returned, anatomical analysis is required to find out the cause of the defect. In the prior art, the cover body of the lead storage battery needs to be cut off to expose the electrode group, and then voltage detection is carried out on each unit cell.

For example, the utility model with the publication number of grant CN207440255U discloses a device for detecting the voltage of a lead storage battery after dissection, the device comprises a plurality of pairs of electrodes which are respectively connected with the positive bus bar and the negative bus bar of a pole group during detection, each pair of electrodes is respectively connected with a voltmeter through a lead, and the electrodes are arranged on a detection frame and respectively correspond to each pole group.

However, in order to reduce the quality problem of the gap bridge and the material cost of the battery, the cast welding of the electric vehicle battery at the present stage is improved from the original gap bridge connection structure into a bus bar direct connection structure, and the bus bar is sealed by glue, so that the lead consumption of the cast welding is greatly reduced, and the gap bridge and the breakage problem of the battery basically do not exist.

For example, the utility model with the authorization notice number of CN203415642U discloses a direct series connection of positive and negative busbar between utmost point crowd does not have bridge lead acid battery, include: the battery comprises a pole group, a battery shell, leading-out terminals, busbars, grooves, busbar series connection points, grids and clamping grooves, wherein the battery shell is provided with a plurality of pole groups, the positive and negative leading-out terminals and the busbars are arranged between the pole groups, the grooves are arranged on the upper portions of the busbars, the busbar series connection points and the busbar series connection points are arranged at the busbar series connection points, and the grids and the clamping grooves are arranged inside the battery shell.

However, the new structure brings new problems, for example, for the defective battery generated in the manufacturing process, the middle cover needs to be sawn for anatomical analysis, the bus bar of each cell of the battery can be reserved after the middle cover is sawn in the original battery structure, the voltage of each cell is measured by using a voltage meter, if the voltage is abnormal, the low voltage of the cell can be displayed, and the examination and analysis are easy. However, in the existing battery structure, because the battery bus bar is sealed in the middle cover by glue, the bus bar can be cut off by sawing the middle cover, so that the voltage condition of each single cell cannot be measured, the pole group of each single cell needs to be pulled out one by one to search the cause, and the pole plate is damaged by external force.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the above-mentioned not enough that exists among the prior art, provide a device for detecting battery abnormal single check.

A device for detecting abnormal cells of a storage battery comprises a battery jar and a battery cover which are mutually covered, wherein a plurality of cells are arranged in the battery jar, a polar group is arranged in each cell, the polar groups are connected in series through direct-connected busbars, the device comprises a bottom plate for placing the storage battery to be detected and a mounting plate arranged above the bottom plate, a liftable detection plate is arranged below the mounting plate, a plurality of detection probes for puncturing the battery cover and contacting the direct-connected busbars of the storage battery and detection probes respectively contacted with the positive terminal and the negative terminal of the storage battery are arranged on the detection plate; the device also comprises a detection circuit led out from the detection probe and the detection probe, and a voltmeter used for detecting each unit cell voltage.

Preferably, the bottom plate is provided with a positioning mechanism for positioning the storage battery.

Preferably, the mounting plate is provided with an air cylinder for driving the detection plate to lift.

Preferably, a guide rod is arranged between the bottom plate and the mounting plate, and a guide hole for the guide rod to pass through is formed in the detection plate.

More preferably, the lower part of the guide rod is sleeved with a limiting sleeve for limiting the descending height of the detection plate.

Preferably, the detection circuit further comprises a variable resistor connected in parallel between the positive terminal and the negative terminal, and a switch connected in series with the variable resistor, wherein the power of the variable resistor is 0-3000W.

The utility model discloses the device is through setting up test probe, and test probe directly punctures the battery cover and switches on with directly linking the busbar when detecting, need not dissect the battery during the detection, can conveniently carry out the detection of each single check utmost point crowd voltage to the lead accumulator who links the busbar structure fast, improves detection efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the device of the present invention.

FIG. 2 is a schematic view of a probe passing through a cell cover and contacting a direct-connect bus bar.

Fig. 3 is a schematic diagram of the position of each directly connected bus in a battery.

FIG. 4 is a schematic diagram of a detection circuit.

Detailed Description

As shown in fig. 1 to 3, a device for detecting abnormal cells of a storage battery, the storage battery 1 comprises a battery jar 101 and a battery cover 102 which are mutually covered, a plurality of cells are arranged in the battery jar 101, each cell is provided with a pole group, the pole groups are connected in series through a directly connected bus bar 103, for the directly connected bus bar 103, the bus bar 103 is higher than the battery jar 101, the bus bar 103 integrally extends into a rubber groove of the battery cover 102 and is sealed by a sealant during assembly, so the directly connected bus bar 103 is sealed by the sealant in the battery cover 102 and is not easy to dissect.

The device for detecting the abnormal cells of the storage battery comprises a bottom plate 2 for placing the storage battery 1 to be detected, a positioning mechanism for positioning the storage battery 1 is arranged on the bottom plate 2, and the positioning mechanism can be a plurality of baffle plates 8 arranged on the bottom plate 2. The positioning mechanism is used for determining the position of the storage battery 1 when the storage battery is placed on the bottom plate 2, so that the storage battery can be aligned conveniently during detection.

The mounting plate 3 is arranged above the bottom plate 2, the liftable detection plate 4 is arranged below the mounting plate 3, and the cylinder 9 used for driving the detection plate 4 to ascend and descend is arranged on the mounting plate 3. The air cylinder 9 may drive the sensing plate 4 directly or may drive the sensing plate 4 indirectly through conduction through some intermediate structure.

The detection plate 4 is provided with a plurality of detection probes 5 for piercing the battery cover 102 and contacting each direct-connected bus bar 103 of the storage battery 1, and detection probes 6 respectively contacting the positive and negative terminals 104 of the storage battery 1. The ends of the detecting probes 5 are pointed ends, which can pierce the battery cover 102 when the detecting plate 4 is driven to descend by the air cylinder 9, and then, the end of each detecting probe 5 is in contact with a direct-connected bus bar 103. The detection probe 6 is not required to be pierced through the battery cover 102 because it is in contact with the terminal 104 exposed on the top surface of the battery cover 102, so that the detection probe 6 is not required to be designed as a tip like the detection probe 5. The detection probe 5 and the detection probe 6 are detachably mounted on the detection plate 4, and are convenient to replace.

As shown in fig. 3, the battery 1 has 6 electrode groups arranged in a 1 × 6 array, five bus bars 103 connected directly thereto, and two separate bus bars connected from the head to the tail to the positive and negative terminals 104, respectively, so that five detection probes 5 are in contact with the bus bars 103 connected directly thereto, and two detection probes 6 are in contact with the terminals 104.

A guide rod 10 is arranged between the bottom plate 2 and the mounting plate 3, and a guide hole for the guide rod 10 to pass through is arranged on the detection plate 4. The lower part of the guide rod 10 is sleeved with a limit sleeve 11 for limiting the descending height of the detection plate 4.

As shown in fig. 4, the apparatus of the present application further includes a detection circuit led from the detection probe 5 and the detection head 6, and a voltmeter 7 for detecting each cell voltage. The detection circuit further comprises a variable resistor 12 connected between the positive terminal and the negative terminal in parallel, and a switch 13 connected with the variable resistor 12 in series, wherein the power of the variable resistor is 0-3000W.

During detection, the storage battery 1 to be detected is placed on the bottom plate 2, the cylinder 9 drives the detection plate 4 to descend, the detection probe 5 on the detection plate 4 penetrates through the battery cover 102 and contacts with the direct-connected busbars 103 of the storage battery 1, the detection probe 6 contacts with the terminal 104 after descending, then a detection circuit is conducted, the voltage value of each single cell is displayed on each voltmeter 7 respectively, and the single cell with a problem is detected. The battery discharge current I is equal to P/U, and the battery needs more than 2 times of current to discharge, so that the cell with low voltage can be detected quickly, and the current in the circuit is adjusted by adjusting the output power of the variable resistor 12.

Claims (6)

1. A device for detecting abnormal cells of a storage battery comprises a battery jar and a battery cover which are mutually covered, wherein a plurality of cells are arranged in the battery jar, each cell is internally provided with a polar group, and the polar groups are connected in series through direct-connected busbars; the device also comprises a detection circuit led out from the detection probe and the detection probe, and a voltmeter used for detecting each unit cell voltage.

2. The device of claim 1, wherein the base plate is provided with a positioning mechanism for positioning the battery.

3. The apparatus of claim 1, wherein the mounting plate is provided with an air cylinder for driving the detection plate to ascend and descend.

4. The apparatus of claim 1, wherein a guide bar is provided between the base plate and the mounting plate, and the detection plate has a guide hole through which the guide bar passes.

5. The apparatus as claimed in claim 4, wherein a lower portion of the guide bar is sleeved with a stopper sleeve for limiting a descending height of the detection plate.

6. The apparatus of claim 1, wherein the detection circuit further comprises a variable resistor connected in parallel between the positive and negative terminals, and a switch connected in series with the variable resistor.

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