JP2002324572A - Method and device for inspecting insulation of a sealed battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for inspecting a sealed battery, for reliable inspection of short-circuits. SOLUTION: First contact means 17 and 17 comprise a pair of terminal contact pieces 19 and 20 independently contacting arbitrary two points of one of terminals 13 and 14. A second contact means 18 comprises a pair of through contact pieces 21 and 21 independently penetrating arbitrary two points of coated layer. Before a practical inspection for inspecting continuity between the first contract means 17 and the second contact means 18, there are provided a first preliminary inspection for inspecting continuity between the through contact pieces 21 and 21 while the through contact pieces 21 and 21 of the second contact means 18 penetrates the coated layer, and a second preliminary inspection for inspecting continuity between terminal contact pieces 19 and 20 while the terminal contact pieces 19 and 20 of the first contact means 17 contact one of the terminals 13 and 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery insulation inspection apparatus and a sealed battery insulation inspection method.

[0002]

2. Description of the Related Art As shown in FIG. 8, a non-aqueous electrolyte sealed battery 80 using a metal resin composite film for an outer package is a power generating element in which an electrolyte layer is formed and a positive electrode and a negative electrode are laminated.
81 and a positive terminal 82 connected to the positive and negative electrodes, respectively.
And a negative electrode terminal 83, and a sealed battery package 84 that houses and seals the power generation element 81 so that the open end 82A of the positive terminal 82 and the open end 83A of the negative terminal 83 are exposed to the outside.

In such a sealed battery 80, a power generating element is provided in a sealed battery package 84 in which a predetermined metal-resin composite film 85 is formed in two folds in order to prevent the electrolyte layer from leaking outside or entering the outside air. After accommodating 81, as shown in FIG. 9, the sealed battery package 84 is closed, and flattening margins 86A and 86B are sealed by pressing in the thickness direction while heating the three openings and the surplus portion. , 86C house and seal the power generation element 81. After this, the cutting line indicated by the two-dot chain line
From 95, the surplus portion 96 of the sealed battery package 84 is cut.

[0004] The metal resin composite film 85 is made of a metal foil core made of aluminum foil, and a polyester resin such as polyethylene terephthalate (PET) or a polyamide resin such as nylon or a polyimide resin formed along the surface of the metal foil core. And a fusible resin layer having a metal adhesive property made of a polyolefin resin such as polypropylene (PP) or polyethylene (PE) along the back surface of the metal foil core material.

In the sealed battery package 84, for example, after a pair of substantially rectangular metal-resin composite films 85, 85 are arranged so as to sandwich the power generation element 81 in the thickness direction, each of the metal-resin composite films 85, 85 is formed. The power generation element 81 may be housed and sealed by forming a fusion allowance on the four sides, or the power generation element 81 may be sealed.
May be formed in a cylindrical shape capable of accommodating the same.

[0006]

SUMMARY OF THE INVENTION Such a sealed battery
Reference numeral 80 denotes the fusible resin layers 89, 89 at the time of forming the fusion margins 86A to 86C.
The positive electrode terminal 82 and the negative electrode terminal 83 come into contact with the metal foil core 87 of the metal-resin composite film, so that the positive terminal 82 and the negative electrode 83 come through the metal foil core 87 of the metal-resin composite film. May be short-circuited. Therefore, in such a sealed battery 80, it is necessary to inspect whether the positive terminal 82 and the negative terminal 83 are short-circuited before shipment.

As a short-circuit test of the positive terminal 82 and the negative terminal 83 in the sealed battery 80, for example, the first contact means of an ohmmeter (not shown) is brought into contact with one of the positive terminal 82 and the negative terminal 83 and The second contact means of the ohmmeter penetrates the metal-resin composite film in the thickness direction to contact the metal foil core 87, and the positive terminal 82 and the negative terminal are connected through the first contact means and the second contact means. 83 and metal foil core
A method to check the insulation between the 87s is conceivable. In this case, if the ohmmeter does not show conduction, the positive terminal 82, the negative terminal 83, and the metal foil core 87 are insulated.

Here, for example, when a bar-shaped member having a sharp tip is employed as the second contact means, when the second contact means is made to penetrate the metal-resin composite film, first, the protection constituting the metal-resin composite film 85 is performed. A through hole is formed in the layer or the fusible resin layer, and then a through hole is formed in the metal foil core 87.

However, burrs formed around the through hole in the protective layer or the fusible resin layer cover the inner peripheral surface of the through hole in the metal foil core material 87, and the second contact means and the metal foil core material 87 There is a possibility that a resin burr will be interposed between them.
In this state, poor contact of the second contact means with the metal foil core 87 occurs. At this time, according to the above-described conventional short-circuit inspection method, when the contact failure of the second contact means with the metal foil core material 87 occurs, the sealed battery package 84
Even if the positive terminal 82, the negative terminal 83, and the metal foil core 87 are short-circuited at other parts of the, the ohmmeter does not show conduction, the positive terminal 82, the negative terminal 83, and the metal foil core 87 are insulated. There is a risk of passing the short-circuit inspection as
There is a problem that the reliability of the short-circuit inspection is reduced. Such a problem also applies to a case where the first contact unit has a poor contact with the positive terminal 82 and the negative terminal 83.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sealed battery insulation inspection apparatus and a sealed battery insulation tester capable of performing a highly reliable short-circuit inspection. An object of the present invention is to provide an inspection method.

[0011]

In order to achieve the above-mentioned object, the present invention provides a power generating element having a separator, a negative electrode and a positive electrode, a pair of terminals respectively connected to the positive electrode and the negative electrode, A sealed battery having a sealed battery package for accommodating and sealing the power generating element with a metal-resin composite film so that the open end of the terminal is exposed to the outside; First contact means capable of contacting one of the terminals to check electrical insulation with the foil core;
A second contact means for penetrating the coating layer of the metal-resin composite film in the thickness direction until the first contact means contacts the metal foil material, wherein the first contact means is A pair of terminal contacts that can independently contact any two points on one of the terminals, and the second contact means penetrates independently to any two points on the coating layer; Before performing a main test for checking the continuity between the first contact unit and the second contact unit, each of the penetrating contacts of the second contact unit with respect to the coating layer A first preliminary inspection for inspecting the continuity between the respective penetrating contacts in a state in which the terminal contacts of the first contact means are in contact with one of the terminals. A second test for checking the continuity between the terminal contacts; And performing the Bei inspection (claim 1).

Further, the present invention has a pair of the first contact means, wherein each of the first contact means can contact each of the terminals, and the second preliminary inspection is performed on each of the terminals. (Claim 2), and each of the penetrating contacts is substantially blade-shaped (claim 3).

Further, the present invention provides a power generating element having a separator, a negative electrode and a positive electrode, a pair of terminals respectively connected to the positive electrode and the negative electrode, and the power generating element such that an open end of each terminal is exposed outside. For inspecting the electrical insulation between the terminals and the metal foil core material of the metal-resin composite film, for a sealed-type battery having a sealed-type battery package for housing and sealing the elements with a metal-resin composite film. First contact means capable of contacting one of the terminals, and second contact means for penetrating the coating layer of the metal-resin composite film in the thickness direction until the terminal comes into contact with the metal foil material. A method for inspecting insulation of a sealed battery of a sealed battery, comprising: a pair of terminal contacts capable of independently contacting any two points of one of the terminals with the first contact means. In addition, a pair of penetrating contacts penetrating independently at any two points in the coating layer are provided in the second contact means, and the second contact means of the second contact means with respect to the coating layer. A first preliminary inspection for inspecting continuity between the respective penetrating contacts while penetrating the respective penetrating contacts, and contacting the respective terminal contacts of the first contacting means with one of the respective terminals; After performing a second preliminary inspection for inspecting continuity between the terminal contacts in the state in which the contact is made, a main inspection for inspecting continuity between the first contact unit and the second contact unit is performed. (Claim 4).

According to the sealed battery insulation inspection apparatus and the sealed battery insulation inspection method as described above, the continuity between the metal foil core of the sealed battery and the second contact means is inspected as a first preliminary inspection. After the second preliminary inspection, the continuity between the positive electrode terminal, the negative electrode terminal and the first contact means is inspected, and then the short circuit between the positive electrode terminal, the negative electrode terminal and the metal foil core material is inspected as the main inspection, thereby improving the reliability of the inspection. (Claims 1 and 4).

In the case where a pair of first contact means is provided, each of the first contact means is capable of contacting with each terminal, and the second preliminary inspection is individually performed on each terminal, (1) The trouble of moving the contact means can be eliminated (claim 2). Furthermore, when each penetrating contact is substantially blade-shaped, the metal-resin composite film can be cut and the second contact means can be reliably brought into contact with the metal foil core.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a sealed battery insulation inspection apparatus and a sealed battery insulation inspection method according to the present invention. FIG. 1 is a top view and a side view showing an insulation inspection apparatus for a sealed battery according to the present invention, FIG. 2 is a view showing a first contact means according to the present invention,
FIG. 3 is a view showing a second contact means according to the present invention, FIG. 4 is a view showing a short-circuit test circuit according to the present invention, FIG. 5 is a flowchart showing a short-circuit test according to the present invention, and FIG. Flowchart showing short circuit inspection between metal foil cores, FIG. 7
FIG. 6 is a view showing another embodiment of the second contact means according to the present invention.

As shown in FIG. 1, a sealed battery insulation inspection apparatus 1 of the present invention is for testing the electrical insulation of a sealed battery 10. The sealed battery 10 includes a separator,
A power generating element 12 having a negative electrode and a positive electrode, a pair of terminals 13 and 14 respectively connected to the positive electrode and the negative electrode, and a power generating element such that the open ends of these terminals 13 and 14 are externally exposed.
And a sealed battery package 16 that accommodates and seals 12 with a metal resin composite film 15 (see FIG. 2). Then, the sealed battery insulation inspection device 1 includes a sealed battery 10
The electrical insulation between each of the terminals 13 and 14 and the metal foil core 11 of the metal-resin composite film 15 is inspected.

The sealed battery insulation inspection apparatus 1 comprises a pair of first contact means 17 and 17 which can contact one of the terminals 13 and 14 of the sealed battery 10 and a metal foil core material 11. A pair of second contact means 18, 18 which penetrate the coating layer of the metal-resin composite film 15 in the thickness direction until they come into contact with each other, and a measuring table 22 formed of a rubber-like insulating sheet for holding them. Have. As shown in FIG. 2 (A), the first contact means 17 includes an inner cylinder 19 and an outer cylinder 20 which are concentrically and doubly combined, and as shown in FIG. Outer cylinder 20 is terminal
It comes in contact with 13 and 14 at the same time.

When the first contact means 17 is brought into contact with the terminal 13 (14) of the sealed battery 10, the continuity between the inner cylinder 19 and the outer cylinder 20 is checked, whereby the first contact means 17
13 (14) can be checked whether it is in contact. That is, if the inner cylinder 19 and the outer cylinder 20 are electrically connected, the first contact means
It can be determined that 17 is in contact with terminal 13 (14). The inner cylinder 19 and the outer cylinder 20 have switches SW4 (S
W6) and SW5 (SW7) are connected.

As shown in FIG. 3, the second contact means 18 has a substantially blade-shaped contact blade portion 21 as a penetrating contact, and the contact blade portion 21 uses the metal-resin composite film of the sealed battery 10. Fifteen
Is to penetrate. The switch SW2 (SW3) is connected to the contact blade 21. In addition, contact blade
When 21 penetrates the metal-resin composite film 15, it is protected by the measuring table 22 so that the cutting edge is not broken.

With the pair of second contact means 18, it is possible to inspect whether the metal foil core 11 of the metal-resin composite film 15 is in contact with the second contact means 18, If the second contact means 18, 18 are conducting, it can be determined that these second contact means 18, 18 are in contact with the metal foil core material 11.

FIG. 4 shows an insulation inspection device 1 for this sealed battery.
Circuit. SW4 (SW6) and SW5 (SW7) are connected to the first contact means 17 and 17 as described above.
7 is connected to one terminal of an insulation resistance meter 23 via SW8 and SW1. The above-mentioned SW2, SW3 are connected to the second contact means 18, 18, and these SW2, SW3 are connected to the other terminal of the insulation resistance meter 23 via SW1.

Next, a method of inspecting the sealed battery 10 by the sealed battery insulation inspection apparatus 1 will be described with reference to the flowchart of FIG. In this case, first, as shown in FIG. 1, the sealed battery 10 to be inspected is set on the measuring table 22 (step 51).

Next, as shown in FIG.
7 and 17 are brought into contact with the positive terminal 13 and the negative terminal 14 of the sealed battery 10 (step 52). And the second contact means 18,
18 is pierced by penetrating the metal-resin composite film 15 of the sealed battery 10 (step 53).

Subsequently, as described below, the sealed battery
A short circuit test between the positive electrode terminal 13 and the negative electrode terminal 14 and the metal foil core material 11 is performed (step 54). If the short-circuit test passes, the surplus portion of the metal-resin composite film 15 of the sealed battery 10 is cut from the cutting line 23 as shown in FIG.

FIG. 6 is a flowchart showing a terminal / metal foil core short-circuit test between the positive electrode terminal 13 and the negative electrode terminal 14 and the metal foil core material 11. Here, first, as a first preliminary inspection, the second contact means 18 and 18 and the metal foil core material 11 of the sealed battery 10 are used.
A contact confirmation test is performed (step 31). In this preliminary inspection, after SW3 is turned on, SW1 is turned on and the resistance is measured by the insulation resistance meter 23.

Next, the second contact means 18, 18 and the metal foil core 11
It is determined whether or not is in contact (step 32).
Here, when the insulation resistance meter 23 indicates conduction, the second
The contact means 18, 18 are in conduction. That is, it is determined that the second contact means 18, 18 are in contact with the metal foil core material 11.

If it is determined in step 32 that there is contact, a contact confirmation test between the positive terminal 13 of the sealed battery 10 and the first contact means 17 is performed as a second preliminary inspection (step 33). . Here, after turning on SW2, SW4 and SW5,
Turn on SW1 and measure the resistance with the insulation resistance meter 23.

Next, it is determined whether or not the positive terminal 13 is in contact with the first contact means 17 (step 34). Also in this case, when the insulation resistance meter 23 indicates conduction, it is determined that the positive terminal 13 and the first contact unit 17 are conducting, that is, in contact with each other.

If it is determined in step 34 that there is contact, a contact confirmation test between the negative terminal 14 of the sealed battery 10 and the first contact means 17 is performed as a second preliminary inspection (step 35). ). Here, after SW2, SW6 and SW7 are turned on, SW1 is turned on and the resistance is measured by the insulation resistance meter 23.

Next, it is determined whether or not the negative electrode terminal 14 is in contact with the first contact means 17 (step 36). Also in this case, when the insulation resistance meter 23 indicates the resistance value, it is determined that the contact is in contact.

If it is determined in step 36 that the battery is in contact with the battery, then, as a main test, the positive terminal 13 of the sealed battery 10 is checked.
A short circuit test between the first contact means 17 and the second contact means 18, 18 is performed (step 37). This short-circuit inspection is SW4, SW
5. After turning on SW8, turn on SW1 and measure the resistance with the insulation resistance meter 23.

Next, it is determined whether the first contact means 17 on the positive electrode terminal 13 side and the second contact means 18, 18 are short-circuited (step 38). Here, when the insulation resistance meter 23 indicates an infinite resistance value, it is determined that the positive terminal 13 and the first contact means 17 are not conducting, that is, not short-circuited.

If it is determined in step 38 that there is no short circuit, then a short circuit test between the first contact means 17 and the second contact means 18 on the negative electrode terminal 14 side is performed as a main test (step 38). 39). In this short-circuit inspection, after SW6, SW7, and SW8 are turned on, SW1 is turned on, and the resistance is measured by the insulation resistance meter 23.

Next, it is determined whether the first contact means 17 on the negative electrode terminal 14 side and the second contact means 18, 18 are short-circuited (step 40). Also here, if the insulation resistance meter 23 indicates an infinite resistance value, it is determined that a short circuit has not occurred.

If it is determined in step 40 that there is no short circuit, the inspection of the short circuit between the terminal and the metal foil core material ends. In this case, each of the first contact means 17, 17 is a sealed battery.
The positive contact 13 and the negative contact 14 of the battery 10 are correctly contacted, and the second contact means 18, 18 are made of metal foil core material of the sealed battery 10.
11, the metal foil core material 11 is insulated from the positive electrode terminal 13 and the negative electrode terminal 14, and the test passes.

Step 32, step 34, step
If it is determined at 36 that there is no contact, and
38, If it is determined in step 40 that there is a short circuit,
Error processing is performed.

The order of the first preliminary inspection and the second preliminary inspection can be changed as appropriate. Further, if the portions related to the first preliminary inspection and the second preliminary inspection in the inspection circuit of FIG. 4 can be temporarily made independent circuits, these preliminary inspections can be performed simultaneously.

As described above, according to the sealed battery insulation inspection apparatus 1 and the sealed battery insulation inspection method of the present invention, the main inspection is performed after the first preliminary inspection and the second preliminary inspection. The performance is improved. Further, the second contact means 18, 18 have a blade-shaped contact blade 21 (FIG. 3), and the contact blade 21 surely cuts the metal-resin composite film 15 of the sealed battery 10 to form a contact blade. Since the metal 21 reliably contacts the metal foil core material 11 at the intermediate portion, it is possible to prevent poor contact and improve the reliability of the short-circuit inspection.

Further, the first contact means 17 is connected to the positive terminal 13 and the negative terminal 14 of the sealed battery 10 by two.
Since the first contact means 17 are provided, the trouble of moving the first contact means 17 can be reduced as compared with the case where only one first contact means 17 is provided.

In the above embodiment, the second contact means
Although a blade-shaped contact blade portion 21 was provided as a penetrating contact on 18,
As shown in FIG. 7, a needle-like (thousand-threaded) contact needle portion 25 may be provided in place of the contact blade portion 21.

[0042]

As described above, according to the sealed battery insulation inspection apparatus and the sealed battery insulation inspection method of the present invention, as a preliminary inspection, the metal foil core material of the sealed battery and the second contact means are used. After checking the continuity of the positive and negative terminals and the continuity between the positive and negative terminals and the first contact means, a short circuit between the positive and negative terminals and the metal foil core material is checked as the main inspection, so that the reliability of the inspection is improved. 4).

In the case where a pair of first contact means is provided, each of the first contact means is capable of contacting with each terminal, and the second preliminary inspection is individually performed on each terminal, Since there is no need to move the one contact means, it is possible to save labor for inspection (claim 2).

Further, when each penetrating contact is substantially blade-shaped, the metal-resin composite film can be cut and the second contact means can be reliably brought into contact with the metal foil core, so that the reliability of the inspection is improved. It is improved (claim 3).

[Brief description of the drawings]

FIG. 1 is a top view showing an insulation inspection device for a sealed battery according to the present invention.

FIG. 2 is a view showing a first contact means according to the present invention.

FIG. 3 is a view showing a second contact means according to the present invention.

FIG. 4 is a diagram showing a short circuit inspection circuit according to the present invention.

FIG. 5 is a flowchart showing a short circuit inspection according to the present invention.

FIG. 6 is a flowchart showing a short-circuit inspection between a terminal and a metal foil core material according to the present invention.

FIG. 7 is a view showing another embodiment of the second contact means according to the present invention.

FIG. 8 is a view showing a state in the process of manufacturing a general sealed battery.

FIG. 9 is a diagram showing a general sealed battery.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulation inspection device of sealed battery 10 Sealed battery 11 Metal foil core material 12 Power generation element 13 Positive terminal 14 Negative terminal 15 Metal-resin composite film 16 Package for sealed battery 17 First contact means 18 Second contact means 19 Inner cylinder (Terminal contact) 20 Outer cylinder (Terminal contact) 21 Contact blade (Through contact) 25 Contact needle (Through contact)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G014 AA03 AB61 AC01 5H024 BB13 CC04 CC19 DD01 DD11 DD14 EE01 EE09 5H028 AA01 BB01 BB05 BB12 CC02 EE10

Claims (4)

[Claims] 1. A power generating element having a separator, a negative electrode and a positive electrode, a pair of terminals respectively connected to the positive electrode and the negative electrode, and a metal resin such that an open end of each terminal is exposed to the outside. For a sealed battery having a sealed battery package that is housed and sealed by a composite film, to inspect the electrical insulation between the terminals and the metal foil core material of the metal resin composite film, First contact means capable of contacting one of the terminals, and second contact means for penetrating the coating layer of the metal-resin composite film in the thickness direction until it contacts the metal foil core material. An insulation testing device for a sealed battery, wherein the first contact means has a pair of terminal contacts capable of independently contacting any two points on one of the terminals, and The contact means has a pair of penetrating contacts penetrating independently at any two points in the coating layer, and before conducting a main test for inspecting the continuity between the first contact means and the second contact means. A first preliminary inspection for inspecting continuity between the penetrating contacts in a state where the penetrating contacts of the second contact means penetrate the coating layer; and for one of the terminals, A second preliminary inspection for inspecting continuity between the terminal contacts in a state where the terminal contacts of the first contact means are in contact with each other. 2. The method according to claim 1, wherein the first contact means has a pair, each of the first contact means can contact each of the terminals, and the second preliminary inspection is individually performed on each of the terminals. The insulation inspection device for a sealed battery according to claim 1, wherein: 3. The insulation inspection device for a sealed battery according to claim 1, wherein each of the penetrating contacts has a substantially blade shape. 4. A power generating element having a separator, a negative electrode and a positive electrode, a pair of terminals respectively connected to the positive electrode and the negative electrode, and a metal resin so that an open end of each terminal is exposed to the outside. For a sealed battery having a sealed battery package that is housed and sealed by a composite film, to inspect the electrical insulation between the terminals and the metal foil core material of the metal resin composite film, First contact means capable of contacting one of the terminals, and second contact means for penetrating the coating layer of the metal-resin composite film in the thickness direction until it contacts the metal foil core material. A method for inspecting insulation of a sealed battery, wherein a pair of terminal contacts capable of independently contacting arbitrary two points on one of the terminals is provided on the first contact means, Said pair of through contacts penetrating independently for any two points in Kutsugaeso second
A first preliminary inspection for providing continuity between the penetrating contacts in a state where the penetrating contacts of the second contacting means are penetrated with respect to the coating layer; A second preliminary test for checking continuity between the terminal contacts in a state where the terminal contacts of the first contact means are in contact with one of the first contact means, and then the first contact means A method for inspecting the continuity of the sealed battery with the second contact means.