# US 2010/0167094 A1 · Battery structure

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- Number: US 2010/0167094 A1
- Document ID: US20100167094A1
- Status: Published application
- Kind: A1
- Application number: 12/600,956
- Filed: 2008-06-04
- Published: 2010-07-01
- Earliest claimed: 2007-06-06
- Assignees: Panasonic Corporation
- Inventors: Shinya Geshi; Yasunori Uchida; Masahiko Katou; Shintaro Shimizu; Fuminori Ozaki
- Web page: https://patentgrep.com/patent/US20100167094A1

## CPC

- H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658)
- H01M 50/213: adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence)
- H01M 50/505: comprising a single busbar
- H01M 50/51: Connection only in series
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

This invention relates to a battery structure with improved safety. The battery structure includes: at least two batteries disposed axially parallel to each other, positive terminals thereof facing opposite directions, negative terminals thereof facing opposite directions; an insulating material covering each of the batteries; and a connecting member provided at an end of the at least two batteries for connecting the positive terminal of one of the batteries with the negative terminal of the other battery. The connecting member includes: a negative terminal connector attached to the other battery so as to come into contact with the negative terminal of the other battery; and a bus bar connected at one end portion thereof to the positive terminal of the one battery. The negative terminal connector has a socket into which the other end portion of the bus bar is to be inserted. The tip of the other end portion of the bus bar in the direction of insertion into the socket is chamfered so that it does not impair the insulating material.

## Claims

### Claim 1

A battery structure comprising:
at least two batteries disposed axially parallel to each other, positive terminals thereof facing opposite directions, negative terminals thereof facing opposite directions;
an insulating material covering each of the batteries; and
a connecting member provided at an end of the at least two batteries for connecting the positive terminal of one of the batteries with the negative terminal of the other battery,
wherein the connecting member includes: a negative terminal connector attached to the other battery so as to come into contact with the negative terminal of the other battery; and a bus bar connected at one end portion thereof to the positive terminal of said one battery,
the negative terminal connector has a socket into which the other end portion of the bus bar is to be inserted, and
the tip of the other end portion of the bus bar in the direction of insertion into the socket is chamfered.

### Claim 2 (depends on 1)

The battery structure in accordance with claim 1, wherein the socket of the negative terminal connector is prismatic.

### Claim 3 (depends on 1)

The battery structure in accordance with claim 1, wherein the negative terminal connector comprises: a cylindrical portion fitting to the end portion of the other battery on the negative terminal side; and a flat plate facing the bottom of the other battery on the negative terminal side, and the flat plate has the socket.

### Claim 4 (depends on 1)

The battery structure in accordance with claim 1, wherein the other end portion of the bus bar has a step that protrudes toward the flat plate when the other end portion is inserted into the socket.

### Claim 5 (depends on 1)

The battery structure in accordance with claim 1, wherein the flat plate of the negative terminal connector has a protrusion to come into contact with the other end portion of the bus bar upon insertion into the socket, and the protrusion is provided at least in front of or behind the socket in the insertion direction.

### Claim 6 (depends on 5)

The battery structure in accordance with claim 5, wherein the protrusion is in the shape of a line, dots, or an oval.

### Claim 7 (depends on 1)

The battery structure in accordance with claim 1, wherein the other end portion of the bus bar has an insertion-depth defining protrusion to abut against an opening edge of the socket to define the depth of insertion into the socket.