Large-current detection device for storage battery

Abstract

A storage battery large current detection device comprises a detection clamp set and a conversion device which is connected in series between a power supply and the detection clamp set and used for switching the positive electrode and the negative electrode of the power supply. Each detection clamp group is composed of two side-by-side detection clamps, and the two detection clamps are in one-to-one correspondence with terminals at the upper ends of the batteries; the two detection clamps in the same group are respectively connected with the positive and negative electrodes of the power supply; the conversion device comprises a bottom plate and a bidirectional knife switch; the bottom plate is provided with an upper lug plate group, a middle lug plate group and a lower lug plate group which are arranged side by side. Each lug plate group is composed of a left lug plate and a right lug plate. And one end of the bidirectional knife switch is hinged to the middle lug plate group. Rapid remodeling of positive and negative polarity of the large-current detection device is realized, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead-acid batteries, and particularly relates to a large-current detection device for batteries. Background Art

[0002] In the battery manufacturing industry, large-current detection devices are usually used to perform discharge tests on lead-acid batteries before leaving the factory. Through large-current detection, faulty batteries can be quickly identified and removed. During the use of large-current detection devices, since the terminals of lead-acid batteries have two polar states: normal installation and reverse installation, during the production process, it is often necessary to adjust the power supply connection wires of the two detection jigs of the large-current detection device according to the different polarities of the battery terminals, either in normal installation or reverse installation.

[0003] The current adjustment method for the connection wires of the detection jigs of the large-current detection device is as follows: Remove the fixing screws of the connection wires on the detection jigs corresponding to the two terminals of the battery, and then swap the connection wires on the two detection jigs. After swapping, the polarities of the positive and negative circuits are converted, and then the fixing screws are tightened. Such a swapping method increases the labor intensity, and frequent disassembly and fixing of the fixing screws on the detection jigs are also likely to cause wear of the screws, resulting in poor contact between the connection wires and the detection jigs, affecting the detection jigs from burning out the battery terminal posts during the large-current detection process. Therefore, it is necessary to design a large-current detection device for batteries to solve the problem of frequent model changes during the battery production process, reduce the labor intensity, improve the production efficiency, and improve the problem of terminal burning caused by poor contact of the jig connection wires. Summary of the Invention

[0004] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art, so as to provide a large-current detection device for batteries, realizing the rapid model change of the positive and negative polarities of the large-current detection device and improving the production efficiency.

[0005] The technical solution of the utility model is: A large-current detection device for batteries, comprising:

[0006] A detection jig group, each group of the detection jig group consists of two side-by-side detection jigs, and the two detection jigs correspond one by one to the terminals at the upper end of the battery;

[0007] The two detection jigs in the same group are respectively connected to the positive and negative poles of the power supply;

[0008] A conversion device connected in series between the power supply and the detection jig group for switching the positive and negative poles of the power supply, the conversion device includes a bottom plate and a double-throw knife switch;

[0009] Three groups of terminal piece groups arranged side by side, upper, middle and lower, are provided on the bottom plate, and each group of the terminal piece groups consists of two terminal pieces, left and right;

[0010] One end of the double-way knife switch is hinged to the middle set of connection pieces.

[0011] Two connection pieces of the middle set of connection pieces are respectively connected to the output terminals of the three-phase fully controlled bridge rectifier circuit; the left connection piece of the upper set of connection pieces is connected to the right connection piece of the lower set of connection pieces through a wire, and the left connection piece of the upper set of connection pieces is connected to one of the detection jigs of the detection jig set, and the right connection piece of the upper set of connection pieces is connected to the left connection piece of the lower set of connection pieces through a wire, and the right connection piece of the upper set of connection pieces is connected to the other detection jig of the detection jig set.

[0012] The input end of the three-phase fully controlled bridge rectifier circuit is connected to the power supply.

[0013] Connection posts protrude from the four connection pieces of the two sets of connection pieces arranged side by side up and down.

[0014] The double-way knife switch includes two juxtaposed connection frames. One ends of the two connection frames are respectively hinged to the two connection pieces of the middle set of connection pieces. The other ends of the two connection frames are connected by an insulating ceramic cross bar, and there is a protruding handle in the middle of the cross bar.

[0015] There are two clamping pieces in the middle of the connection frame that can clamp the connection posts on the connection pieces. The distance between the two clamping pieces is slightly smaller than the width of the connection posts on the connection pieces.

[0016] A button is provided at the lower end of the bottom plate. The normally closed contact K1 of the button is connected to one end of the open contact K2 and then connected to one of the detection jigs of the detection jig set. The normally closed contact K3 is connected to one end of the open contact K4 and then connected to the other detection jig of the detection jig set. The other ends of the normally closed contact K1 and the open contact K4 are connected and then communicated with the input end of the voltage isolation sensor. The other ends of the normally closed contact K3 and the open contact K2 are connected and then communicated with the other input end and output end of the voltage isolation sensor. The input end of the voltage isolation sensor is connected to the PLC controller.

[0017] The utility model is mainly used for the large current detection of the storage battery. By switching the opening and closing directions of the double-way knife switch, the positive and negative poles of the fixture can be quickly switched, and the production efficiency can be improved. Description of the Drawings

[0018] Figure 1 is the front view of the utility model;

[0019] Figure 2 is the side view of the utility model;

[0020] Figure 3 is the position relationship diagram of the detection jig set and the battery;

[0021] Figure 4 is the structure diagram of the conversion device;

[0022] Figure 5 It is the circuit wiring diagram of the power supply circuit of the detection fixture;

[0023] Figure 6 It is the circuit schematic diagram of the detection fixture signal acquisition. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a detection fixture group and a conversion device are arranged on a frame 1; the detection fixture group consists of a detection fixture 10 and a detection fixture 2 11, which are arranged side by side and correspond to the battery terminals at the upper end of the battery, and the detection fixture 10 and the detection fixture 2 11 are used to clamp the battery terminals, and the detection fixture 10 and the detection fixture 2 11 can use the terminal fixture of the existing structure. The conversion device is used to switch the positive and negative poles of the power supply, and the conversion device is connected in series to the power line 13 between the output end of the three-phase full-controlled bridge rectifier circuit 15 and the detection fixture group.

[0026] like Figure 4 As shown, the conversion device includes a base plate and a two-way switch 9. The base plate is provided with 6 connecting pieces, which are arranged side by side on the base plate in pairs, forming three groups of connecting pieces arranged side by side at the top, middle and bottom on the base plate 2. The four connecting pieces of the two groups of connecting pieces arranged side by side at the top and bottom have connecting posts 17 protruding from them. The two-way switch 9 includes two connecting frames arranged side by side, and two clips 16 are provided in the middle of the connecting frames to clamp the connecting posts 17 on the connecting pieces. The spacing between the two clips 16 is slightly smaller than the width of the connecting posts 17 on the connecting pieces. One end of the two connecting frames is hinged to the connecting piece three 5 and the connecting piece four 6 respectively, and the other ends of the two connecting frames are connected through an insulating ceramic cross bar, and a raised handle is provided in the middle of the cross bar.

[0027] like Figure 5As shown, the power lines led out by the terminal lug three 5 and the terminal lug four 6 are connected to the two output terminals of the three-phase fully controlled bridge rectifier circuit 15. The power lines behind the terminal lug one 3 and the terminal lug two 4 are connected to the test fixture one 10 and the test fixture two 11 of a set of test fixture groups. The terminal lug one 3 is connected to the terminal lug six 8 through a wire, and the terminal lug five 7 is connected to the terminal lug two 4 through a wire. When the two-way knife switch 9 rotates to clamp the terminal lug one 3 and the terminal lug two 4, the cables behind the terminal lug one 3, the terminal lug two 4, the terminal lug three 5, and the terminal lug four 6 form a path with the test fixture one 10 and the test fixture two 11, and a lead-acid battery with reverse-mounted terminals can be produced. When it is necessary to produce a lead-acid battery with forward-mounted terminals by changing the type, the two-way knife switch 9 can be rotated to the terminal lug five 7 and the terminal lug six 8. The cable behind the terminal lug five 7 is connected to the terminal lug two 4, and the cable behind the terminal lug six 8 is connected to the terminal lug one 3. When the two-way knife switch 9 rotates to clamp the terminal lug five 7 and the terminal lug six 8, the cables behind the terminal lug five 7, the terminal lug six 8, the terminal lug three 5, and the terminal lug four 6 form a path with the test fixture one 10 and the test fixture two 11, and a lead-acid battery with forward-mounted terminals can be produced.

[0028] As Figure 1 , Figure 6 shown, in another embodiment, there is 1 button 14 provided under the conversion device base plate. The button 14 is connected in series on the signal acquisition line 13 between the two test fixtures of the test fixture group and the voltage isolation sensor 12. One end of the normally closed contact K1 of the button 14 is connected to one end of the open contact K2 and then connected to one of the test fixtures of the test fixture group. One end of the normally closed contact K3 is connected to one end of the open contact K4 and then connected to the other test fixture of the test fixture group. The other ends of the normally closed contact K1 and the open contact K4 are connected and then communicated with the negative input terminal of the voltage isolation sensor 12. The other ends of the normally closed contact K3 and the open contact K2 are connected and then communicated with the positive input terminal output of the voltage isolation sensor 12. The input terminal of the voltage isolation sensor 12 is connected to the PLC controller. The voltage isolation sensor 12 is used to receive the battery state information detected by the large current detection device. When the two-way knife switch 9 rotates to clamp the terminal lug five 7 and the terminal lug six 8, the handle of the two-way knife switch 9 will press the button switch downward, and the open contacts K2 and K4 will close, transmitting the detection information of the forward-mounted terminal battery to the PLC module. When the two-way knife switch 9 rotates to clamp the terminal lug one 3 and the terminal lug two 4, the handle of the two-way knife switch 9 will leave the button switch, and the button switch will bounce upward, and the normally closed contacts K1 and K3 will close, transmitting the detection information of the reverse-mounted terminal battery to the PLC controller.

[0029] The above has specifically described an embodiment of the present utility model creation. However, the present utility model creation is not limited to the said embodiment. Those skilled in the art can also make other equivalent variations or substitutions without departing from the spirit of the present utility model creation, and these equivalent variations or substitutions are included within the scope defined by the claims of this application.

Claims

1. A large current detection device for a storage battery, characterized in that: Including: A group of detection jigs, each group of the detection jig groups consists of two side-by-side detection jigs, and the two detection jigs correspond one-to-one to the terminals at the upper end of the battery; The two detection jigs in the same group are respectively connected to the positive and negative electrodes of the power supply; A conversion device (2) connected in series between the power supply and the detection jig group and used to switch the positive and negative electrodes of the power supply, and the conversion device (2) includes a bottom plate and a double-throw knife switch (9); There are three groups of terminal block groups arranged side by side on the upper, middle and lower parts of the bottom plate, and each group of the terminal block groups consists of two terminal blocks on the left and right; One end of the double-throw knife switch (9) is hinged on the middle group of terminal block groups; 2. The large current detection device for storage battery according to claim 1, characterized in that: The two terminal blocks of the middle group of terminal block groups are respectively connected to the output terminals of the three-phase fully controlled bridge rectifier circuit (15); the left terminal block of the upper group of terminal block groups is connected to the right terminal block of the lower group of terminal block groups through a wire, and the left terminal block of the upper group of terminal block groups is connected to one of the detection jigs of the detection jig group, and the right terminal block of the upper group of terminal block groups is connected to the left terminal block of the lower group of terminal block groups through a wire, and the right terminal block of the upper group of terminal block groups is connected to the other detection jig of the detection jig group; 3. The large current detection device for storage battery according to claim 2, wherein: The input end of the three-phase fully controlled bridge rectifier circuit (15) is connected to the power supply; 4. The large current detection device for a storage battery according to claim 1, characterized in that: Terminal posts (17) protrude from the four terminal blocks of the two groups of terminal block groups arranged side by side on the upper and lower parts; 5. The large current detection device for storage battery according to claim 1 or 4, characterized in that: The double-throw knife switch (9) includes two side-by-side connecting frames, one ends of the two connecting frames are respectively hinged on the two terminal blocks of the middle group of terminal block groups, and the other ends of the two connecting frames are connected by an insulating ceramic cross bar, and there is a protruding handle in the middle of the cross bar; 6. The large current detection device for a storage battery according to claim 5, wherein: There are two clamping pieces (16) in the middle of the connecting frame that can clamp the terminal posts (17) on the terminal blocks, and the distance between the two clamping pieces (16) is slightly smaller than the width of the terminal posts (17) on the terminal blocks; 7. The large current detection device for a storage battery according to claim 1, characterized in that: A button (14) is provided at the lower end of the bottom plate. One end of the normally closed contact K1 of the button (14) is connected to one end of the open contact K2 and then connected to one of the detection jigs of the detection jig group. One end of the normally closed contact K3 is connected to one end of the open contact K4 and then connected to the other detection jig of the detection jig group. The other ends of the normally closed contact K1 and the open contact K4 are connected and then communicated with the input end of the voltage isolation sensor (12). The other ends of the normally closed contact K3 and the open contact K2 are connected and then communicated with the other input end output of the voltage isolation sensor (12). The input end of the voltage isolation sensor (12) is connected to the PLC controller.

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