JP2007035306A - Short-circuit test method of electrode plate group for lead-acid battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a short-circuit test of an electrode plate group for a lead-acid battery using a bag-like separator to be surely executed. <P>SOLUTION: When the short-circuit test of the electrode group 1 for a lead-acid battery where either positive electrode plates 4 or negative electrode plates 2 each having a lug part in an upper part thereof are housed in the bag-like separator 3, the short-circuit test of the electrode plate group 1 is executed by applying a test voltage between the positive electrode plates and the negative electrode plates of the electrode plate group 1 from a test voltage application device 13 with a part nearer to the upper end than to the center part in the vertical direction of the electrode plate group 1 pressed in the stacking direction of the electrode plate group by a pressing device 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a short circuit test method for testing the presence or absence of a short circuit between electrode plates in a group of electrode plates for a lead storage battery.

  In a lead storage battery, adjacent electrode plates may be in electrical contact with each other and short-circuited during the manufacturing process. Short-circuiting between the electrodes tends to occur more often on the upper side of the electrode that tends to protrude from the separator. For example, when taking a structure in which a positive electrode plate or a negative electrode plate is accommodated in a bag-like separator, as shown in Patent Document 1, it is formed by cutting a long strip separator into a predetermined length. Separator electrode plate assembly having a structure in which the electrode plate is sandwiched between the unit separators folded in half by applying the electrode to the middle part of the unit separator and folding the unit separator in half while sandwiching the electrode therebetween The unit separator is formed into a bag shape by joining both end portions in the width direction of the unit separator folded in half in the separator electrode plate assembly. When a bag-like separator is formed by such a method, if the unit separator is folded in two, or if there is a mistake in cutting the separator, the influence of the separator is on the opening side of the separator (pole It may appear prominently on the upper side of the plate), and the upper part of the electrode plate may not be covered by the separator. Therefore, when the electrode plate group is inserted into the battery case and pressed in the stacking direction, a short circuit between adjacent electrode plates easily occurs particularly in the upper part of the electrode plate group.

  As described above, a battery in which a short circuit between electrode plates occurs is a defective product. In order to prevent defective products from being shipped, it is necessary to test whether a short circuit has occurred between the plates. As a short circuit test method for the electrode plate group for a lead storage battery, as shown in Patent Document 2, before the electrode plate group is inserted into the battery case, the electrode plate group is pressurized in the stacking direction. A method is known in which a test voltage is applied between electrode plates to check whether a short-circuit current flows.

  In this way, if the test voltage is applied in a state where the electrode plate group is pressurized in the stacking direction, it is the same as the case where the electrode plate group is inserted into the battery case without being inserted into the battery case. Since the state can be created, it is possible to determine the quality of the product by detecting whether or not there is a possibility of a short circuit between the electrode plates before the electrode plate group is inserted into the battery case.

As shown in Patent Document 2, in the conventional short-circuit test method, when a test voltage is applied, a pressurizing tool is applied to the central portion of the electrode plate group, and the electrode plate group is placed in the stacking direction. Pressurized.
Japanese Patent Publication No.53-18254 JP 2001-236985 A

  As described above, in a lead storage battery in which a negative electrode plate or a positive electrode plate is accommodated in a bag-shaped separator, when the electrode plate group is inserted into the battery case, a short circuit between the electrode plates tends to occur at the upper part of the electrode plate group. However, in the conventional short-circuit test method, since the center part of the electrode plate group is pressurized, when the electrode plate group is inserted into the battery case, there is a place where a short circuit can occur at the upper part of the electrode plate. Could not be detected.

  An object of the present invention is to propose a short-circuit test method capable of reliably detecting a short-circuit state of a lead storage battery electrode plate group using a bag-shaped separator.

  The present invention relates to a short-circuit test method for an electrode plate group for a lead storage battery in which one of a positive electrode plate and a negative electrode plate having ears at the upper portion is accommodated in a bag-shaped separator. In the present invention, a test voltage is applied between the positive electrode plate and the negative electrode plate of the electrode plate group in a state in which a portion closer to the upper end than the center part in the vertical direction of the electrode plate group is pressed in the stacking direction of the electrode plate group. By doing so, the short circuit test of the electrode group was performed.

  In an electrode plate group for lead-acid batteries using a bag-shaped separator, the electrode plate protrudes from the separator on the upper side of the electrode plate group due to a problem in forming the separator, and the electrode plate group is placed in the battery case. There is a possibility that a short circuit between the electrode plates may occur at the top of the electrode plate group when inserted into the inside, but in the present invention, when a bag-like separator is used, a short circuit point is likely to occur near the upper end of the electrode plate group. In order to apply a test voltage between the electrodes while pressing the part in the stacking direction of the electrode plates, detection of the presence or absence of a short-circuited portion of the electrode group for lead-acid batteries using a bag-like separator is performed. This can be performed reliably in a state before being inserted into the tank.

  As described above, according to the present invention, when a bag-shaped separator is used, a pole is formed in a state in which a portion closer to the upper end than the center portion of the electrode plate group in which a short-circuited portion easily occurs is pressed in the stacking direction of the electrode plate group. Since the test voltage is applied between the plates, the short-circuit test of the lead storage battery electrode plate group using the bag-shaped separator can be accurately performed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
1A and 1B show an example of an electrode plate group 1 to be tested in the present invention. In these drawings, reference numeral 2 denotes a negative electrode plate housed in a bag-like separator 3. Is a positive electrode plate, and the negative electrode plate 2 and the positive electrode plate 4 have ears 2a and 4a at their upper portions. The bag-shaped separator 3 is formed into a bag shape by folding a belt-shaped separator material in half and sandwiching the negative electrode plate 2 therebetween, and then joining both ends in the width direction. In FIG. 1 (A), 3a and 3a have shown the junction part of the both ends of the width direction of the separator 3. FIG. Further, 5 is a negative strap for connecting the ears 2a, 2a,... Of the negative plates 2, 2,..., And 6 is a positive strap for connecting the ears 4a, 4a,.

  In the short-circuit test method of the present invention, after the electrode plate group 1 is manufactured, the electrode plate group 1 is pressed in a direction closer to the upper end than the center portion in the vertical direction in the stacking direction of the electrode plate group 1. A test voltage is applied between the plate and the positive plate. 2A and 2B show a state in which the electrode plate group is pressurized by the pressurizing device 10. The pressurizing device 10 shown in the figure is a pair of pressurizing tools 11 provided so as to come into contact with the electrode plates at both ends of the electrode plate group 1 from the outside at a portion closer to the upper end than the central portion in the vertical direction of the electrode plate group 1. 11 and a pressurizing cylinder 12 that drives the pressurizing tools 11 and 11 in a direction in which they are separated from each other and a direction in which the pressurizing tools 11 and 11 are brought close to each other.

  When performing the short-circuit test, the portion near the upper end of the electrode plate group 1 is inserted between the pair of pressurizing tools 11 and 11 before the electrode plate group 1 is inserted into the battery case. By energizing the pressure shilling 12, the portion near the upper end of the electrode plate group 1 is pressurized in the stacking direction.

  Next, as shown in FIGS. 3A and 3B, a test voltage is applied between the positive electrode plate and the negative electrode plate of the electrode plate group 1 from the test voltage application device 13 to see if a short-circuit current flows. Thus, it is determined whether or not there is a short circuit location. The illustrated test voltage application device 13 includes an insulating plate 14, electrodes 15 and 16 arranged in parallel to each other and supported at the rear end by the insulating plate 14, and a DC power source 17 that applies a test voltage between these electrodes. It is made up of. The electrodes 15 and 16 are arranged at a distance substantially equal to the distance between the centers of the straps 5 and 6 so that the respective tips can contact the negative strap 5 and the positive strap 6 from above. The test voltage can be applied between the positive electrode plate and the negative electrode plate of the electrode plate group 1 by applying a test voltage from the power source 17 to the electrodes 15 and 16 with the 16 being in contact with the straps 5 and 6, respectively. It can be done.

  As described above, when a test voltage is applied between the electrode plates in a state where the portion closer to the upper end than the central portion in the vertical direction of the electrode plate group 1 is pressed in the stacking direction of the electrode plate group, Since the test voltage can be applied in a state where the short-circuited portion is likely to be short-circuited when inserted into the battery case in the lead-acid battery electrode plate group using the Detection can be performed reliably.

(A) And (B) is the front view and left view which showed an example of the electrode group made into the test object in the test method of this invention. (A) And (B) is the front view and left view which showed the state which pressurized the electrode group made into the test object in the test method of this invention. (A) And (B) is the front view and left view which showed the state at the time of applying a test voltage to the electrode group made into the test object in the test method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrode plate group 2 Negative electrode plate 3 Bag-shaped separator 4 Positive electrode plate 5 Negative electrode strap 6 Positive electrode strap 10 Pressurization apparatus 11 Pressurization tool 12 Pressurization cylinder 13 Test voltage application apparatus

Claims (1)

One of the positive electrode plate and the negative electrode plate having ears at the top is a short-circuit test method for the electrode plate group for a lead storage battery, which is accommodated in a bag-shaped separator,
By applying a test voltage between the positive electrode plate and the negative electrode plate of the electrode plate group in a state in which a portion closer to the upper end than the central portion in the vertical direction of the electrode plate group is pressed in the stacking direction of the electrode plate group. A short-circuit test method for the electrode plate group for a lead storage battery, comprising performing a short-circuit test on the electrode plate group.

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