Non-aqueous electrolyte battery and method of manufacturing same

• US 5,458,993 A
• Filed: 11/22/1994
• Issued: 10/17/1995
• Est. Priority Date: 11/22/1993
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Ogawa, Satoshi, Terao, Yoshiki, Sadakuni, Sakae, Daio, Fumio
• Primary Examiner(s): Niebling, John
• Assistant Examiner(s): Bell, Bruce F.
• Application Number:
  US08/343,636
• Time in Patent Office: 329 Days
• Field of Search: 429/94, 429/164, 429/165, 429/218, 429/225, 429/233, 429/247, 429/194, 29/623.1, 29/623.4, 29/623.2, 29/623.5
• US Class Current: 429/94
• CPC Class Codes: H01M 10/05 Accumulators with non-aqueous electrolyte H01M10/39 takes precedence
• CPC Class Codes: H01M 4/06 Electrodes for primary cells
• CPC Class Codes: H01M 4/50 of manganese
• CPC Class Codes: H01M 4/502 for non-aqueous cells H01M4/505 takes precedence
• CPC Class Codes: H01M 50/489 Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
• CPC Class Codes: H01M 50/533 characterised by the shape of the leads or tabs
• CPC Class Codes: H01M 6/10 with wound or folded electrodes
• CPC Class Codes: H01M 6/16 with organic electrolyte H01M6/18 takes precedence
• CPC Class Codes: H01M 6/50 Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10T 29/49108 Electric battery cell making
• CPC Class Codes: Y10T 29/4911 including sealing
• CPC Class Codes: Y10T 29/49114 including adhesively bonding
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A non-aqueous electrolyte battery comprising a positive electrode plate and a negative electrode plate of a light metal spirally wound with a separator in between and an electrolyte, wherein said separator is a microporous membrane or a non-woven cloth provided with a non-ion-permeable insulating band on at least one side and in a direction along the length of, and in the middle of the width of said separator, or said positive electrode plate comprises manganese dioxide as the cathodic active material and is provided with a band of a manganese lower oxide thereon at the middle and in a direction along the length of the electrode plate, having not only superior high-rate discharge performance but also high capacity and reliability without affecting prior art manufacturing processes used to produce the battery.

Claims

1. A non-aqueous electrolyte battery comprising a strip positive electrode plate and strip negative electrode plate of a light metal with a lead plate spirally wound with a strip separator in between, and an electrolyte, wherein said separator is of a microporous membrane or a non-woven cloth provided with a non-ion-permeable band-shape insulating part, disposed on at least one side along the length of the separator in the middle of the width thereof.

2. A non-aqueous electrolyte battery according to claim 1, wherein said non-ion-permeable insulating part is formed by attaching an insulating adhesive tape to said separator or by laying and drying an insulating paint on said separator.

3. A non-aqueous electrolyte battery of claim 1, wherein said microporous membrane and non-woven cloth are of polyolefin.

4. The method of manufacturing a non-aqueous electrolyte battery of claim 3, wherein said non-ion-permeable insulating part is formed by applying an insulating adhesive tape to said separator or by laying and drying an insulating paint on said separator.

5. The method of manufacturing a non-aqueous electrolyte battery of claim 3, wherein said microporous membrane separator and said non-woven cloth welded on said separator are of polyolefin.

6. A non-aqueous electrolytic battery comprising a strip positive electrode plate and a strip negative electrode plate of lithium foil with a lead plate fixed to said negative electrode plate and a strip separator of microporous membrane with a non-woven cloth fixed thereon at specific points, said negative electrode plate and said non-woven cloth being combined to form one body spirally wound with said separator between said electrode plates to form an electrode plate assembly and an organic electrolyte, wherein said non-woven cloth is provided with a non-ion-permeable band-shaped insulating part on at least one side, in a direction along the length of said separator in the middle of the width thereof.

7. A non-aqueous electrolyte battery according to claim 6 wherein said non-ion-permeable insulating part is formed by attaching an adhesive tape to such separator or by laying and drying an insulating paint on said separator.

8. A non-aqueous electrolyte battery according to claim 6 wherein said microporous membrane and non-woven cloth are of polyolefin.

9. A method of manufacturing a non-aqueous electrolyte battery comprising the steps of:

forming a non-ion-permeable band-shaped insulating part on at least one side of a non-woven cloth,

welding said non-woven cloth on a strip microporous membrane separator at a plurality of points at the middle of the width thereof and in a direction, along the length of said separator,

pressing said non-woven cloth on a strip negative electrode plate of lithium foil with a lead plate to form one body,

spirally winding said negative electrode plate and a strip positive electrode plate with said separator in between to form an electrode plate assembly,

placing said electrode plate assembly in a container,

pouring an organic electrolyte in said container; and

sealing said container.

10. A non-aqueous electrolyte battery comprising a strip negative electrode plate of light metal foil with a lead plate and a strip positive electrode plate with manganese dioxide as the cathodic active material spirally wound with a separator in between to form an electrode plate assembly and an organic electrolyte;

wherein said positive electrode plate is provided with a band of a manganese lower oxide thereon at the middle and in a direction along at least a portion of the length of said separator.

11. A method of manufacturing a non-aqueous electrolyte battery comprising the steps of:

preparing a strip positive electrode plate having manganese oxide as the cathodic active material, and a strip negative electrode plate of light metal foil having a lead plate,

projecting a laser beam on said electrode plate to form a band of a manganese lower oxide thereon at the middle and in a direction along at least a portion of the length of said separator,

spirally winding said positive electrode plate and negative electrode plate with a band separator in between to form an electrode plate assembly,

putting said electrode plate assembly in to a battery container,

pouring an organic electrolyte into the container, and

sealing said container.

12. The method of manufacturing a non-aqueous electrolyte battery of claim 11, wherein said laser beam is obtained by a carbon dioxide gas laser apparatus or by YAG laser apparatus.

13. The method of manufacturing a non-aqueous electrolyte battery of claim 11, wherein the power of said laser beam is 3 to 8 watts for the carbon dioxide laser apparatus and 10 to 30 watts for YAG laser apparatus.