JPH06333579A - Method for selecting cylindrical dry battery - Google Patents

Abstract

(57) [Abstract] [Purpose] A metal outer can that is electrically insulated from a positive electrode terminal and a negative electrode terminal is provided, and an insulating ring or seal is provided between at least one of the terminals and the metal outer can. It is an object of the present invention to provide a method of selecting a ring-uninserted product with excellent reliability by utilizing the difference in the total cell height depending on the presence or absence of a ring in a cylindrical dry battery having a ring. [Structure] When the ring is not inserted, the total height of the battery is higher than that of a normally inserted battery. Therefore, it has external terminals with the same terminal distance as the total height of the battery to be sorted, When the battery passes between the external terminals, electrical continuity is established between the external terminals via the bipolar terminals of the battery. By this method, it becomes possible to electrically detect a defective ring not inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for selecting defective cylindrical dry batteries, and more particularly, to a cylindrical dry battery having an insulating ring or a seal ring, which can be easily and reliably checked for the presence or absence of an insulating ring or a seal ring. The present invention relates to a sorting method that can be detected in.

[0002]

2. Description of the Related Art In a cylindrical dry battery, for example, a cylindrical manganese dry battery, a separator is inserted and placed inside a cylindrical zinc container that also serves as a negative electrode, and a positive electrode mixture is filled and pressurized inside the positive electrode mixture center. After inserting the carbon rod, sealed with a resin sealing body, further, with the negative electrode metal terminal on the bottom of the zinc container, with the seal ring being placed, the whole is covered with a heat-shrinkable tube, and the top of the resin sealing body is covered. After arranging the positive electrode metal terminal and the insulating ring and inserting them into a cylindrical metal outer can, an insulating ring is provided between the upper end of the metal outer sheath and the positive electrode metal terminal, and the insulating ring is placed between the lower end of the metal outer sheath and the negative electrode metal terminal. The structure is such that a seal ring covered with a heat-shrinkable tube is sealed in each state.

In the above-mentioned cylindrical manganese dry battery, if the insulating ring is not inserted, the terminals and the metal outer casing may have poor insulation, and the battery may be easily short-circuited. Conventionally, the following method has been performed as a method for detecting a non-inserted insulating ring.

1. A method in which a person visually detects. 2. A method of detecting the presence or absence of a ring by an optical sensor.

3. By measuring the insulation resistance between the battery terminal and the surface of the metal exterior. On the other hand, if the seal ring is not inserted, the sealing performance of the battery may decrease and the storage performance may deteriorate.In the case of a manganese dry battery, when the liquid generated by the discharge inside the battery has a hole in the zinc can. May leak to the outside of the zinc can and further to the outside of the battery, which may contaminate the equipment used or impair the functions of the equipment. As a method for detecting the uninserted seal ring, the above methods 1 and 2 are performed.

[0006]

However, the above-mentioned 1
In the case of the above method, if the reliability of detection is increased, the productivity must be reduced. Moreover, even if it is lowered, sufficient reliability cannot be obtained. In the case of the above method 2, the smaller the battery type, the smaller the ring and the area illuminated by light, so the reliability of detection decreases. In the case of the method described in 3 above, when there is a printed coating film having an insulating property used for design and display on the surface of the metal exterior, the printed coating film becomes an insulator, the measurement accuracy is lowered, and the reliability of detection is lowered. To do. Therefore, also in the cases 2 and 3, the visual method 1 is often used together. It is an object of the present invention to solve the above problems and to provide a method for improving the detection reliability of a defective non-inserted insulating ring or seal ring.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a metal outer can that is electrically insulated from a positive electrode terminal and a negative electrode terminal, and insulates between at least one of the terminals and the metal outer can. In a method for selecting a cylindrical dry battery having a ring or a seal ring, the external height of the battery to be selected is approximately the same as the total height of the batteries to be sorted, and the ring is used when the battery to be sorted passes between the external terminals. According to the difference in the total height of the battery depending on the presence or absence of the battery, the battery electrically connected between the external terminals via the bipolar terminals of the battery is electrically detected as a defective product.

[0008]

[Function] In a cylindrical dry battery, when there is no insulating ring or seal ring, compared to when assembled normally,
The total height of the battery becomes higher than the normal variation range.
As a method of detecting by using the difference in the total battery height between good and defective products, by using a method in which the external terminals of the electric circuit through which the selected battery passes is set to a predetermined size The electric circuit does not conduct through the battery,
When the ring-uninserted product passes through, it conducts through the battery to be sorted and can be electrically detected.

[0009]

EXAMPLES The present invention will be specifically described below based on examples.

FIG. 1 is a structural diagram of a cylindrical manganese dry battery. The zinc can 1, the separator paper 2, the positive electrode mixture 3, the carbon rod 4, and the sealing body 5 are arranged as shown in FIG. Further, an insulating ring 8 is installed between the positive electrode terminal 6 and the metal outer can 7, and a metal outer sheath is provided between the negative electrode terminal 9 and the metal outer can via a seal ring 11 covered with the heat-shrinkable tube 10. It is manufactured by a method of seaming the can end with a certain size.

FIG. 2 is a cross-sectional view of a non-defective product and a non-inserted defective ring product. 12 is a battery without an insulating ring between the positive electrode terminal and the metal outer casing, 13 is a good product, 14 is a battery without a seal ring between the negative electrode terminal and the metal outer casing, 15 is an insulating ring,
Represents a battery without both seal rings. For example, 12 is sealed in a state where there is no insulating ring between the positive electrode terminal and the metal outer casing, and the positive electrode terminal further protrudes by the dimension of the thickness of the insulating ring as compared with the non-defective product 13, so that the total battery height is high. It becomes the same size. Also in No. 14, for the same reason as above, the total cell height is increased by the thickness dimension of the seal ring. In 15, the thickness of both rings is the difference in the total battery height from the non-defective product. In this case, the distance between the external terminals through which the battery passes is set to be larger than the upper limit of the total height variation of the non-defective battery, and is fixed at a position where the non-inserted battery bipolar terminals of the battery come into contact with the external terminals.

FIG. 3 shows an embodiment of the detection circuit according to the present invention. External terminal lower position 16 and upper position 1 through which the battery passes
The distance between 7 is the distance 18 between the external terminals. In this figure, [1] represents a state in which a defective ring-uninserted product comes into contact with an external terminal and the electric circuit is conducted when the defective product is passed. [2] represents a state in which a good product passes through an electric circuit
In this case, there is no continuity because the terminals of the battery do not contact the terminals of the electric circuit.

[0013]

As described above, according to the present invention, it is possible to improve the accuracy of selecting a defective ring-not-inserted product.

[Brief description of drawings]

FIG. 1 Structural diagram of a cylindrical manganese dry battery

FIG. 2 is a schematic cross-sectional view of defective and non-inserted rings.

FIG. 3 is an electric circuit diagram of a ring non-inserted defective product detection circuit according to an embodiment of the present invention.

[Explanation of symbols]

 1 Zinc can 2 Separation paper 3 Positive electrode mixture 4 Carbon rod 5 Sealing body 6 Positive electrode terminal 7 Metal outer can 8 Insulation ring 9 Negative electrode terminal 10 Heat shrinkable tube 11 Seal ring 12 Batteries without insulation ring 13 Good product 14 No seal ring Battery 15 Battery without insulation ring or seal ring 16 External terminal lower part 17 External terminal upper part 18 Distance between external terminals

Claims (1)

[Claims] 1. A cylinder having a metal outer can that is electrically insulated from a positive electrode terminal and a negative electrode terminal, and having an insulating ring or a seal ring between at least one of the terminals and the metal outer can. A method of selecting a dry battery, the method including an external terminal having a terminal distance that is substantially the same as a total height of a battery to be sorted, and the battery to be sorted according to the presence or absence of the ring when the battery to be sorted passes between the external terminals. A method of selecting a cylindrical dry battery, which electrically detects a battery, which has a conduction between external terminals via both terminals of the battery due to a difference in height, as a defective product.