JPS6348949Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an assembled battery, and particularly to an improvement in the structure of an external terminal portion thereof.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a battery group in which six unit cells 2 are arranged in two rows by conductive plates 3. Reference numeral 4 denotes an insulator placed on the end face of the battery group 1, which is provided with a pair of through holes 41 and 42 facing the positive electrode cap A exposed on the end face of the battery group and the bottom face B of the negative terminal outer case, respectively. A communication groove 40 along which a terminal plate of each pole, which will be described later, extends is formed on the upper and outer surfaces.

Reference numerals 5 and 6 are positive and negative terminal plates having the same shape, and one end 51 and 61 are spot-welded S to predetermined positions of the relevant battery, respectively, and the insulator 4 is connected through the through holes 41 and 42. extends along the groove 40,
The other ends 50 and 60 are located on opposite outer surfaces of the insulator 4, respectively. That is, the external terminal portion is constructed by pressing and fixing the insulator 4 that protects the end face of the battery pack with the positive and negative terminal plates 5 and 6. 7 is a connecting tape for connecting battery rows.

Incidentally, in recent years, a method has been proposed in which when charging a secondary battery, the battery temperature at the time of charging is detected and the opening/closing of the charging circuit is controlled. Specifically, a heat-sensitive element such as a thermostat or heat-sensitive resistance element is attached to the battery to be charged, and the heat-sensitive element is incorporated into the charging circuit.
In addition to the positive and negative terminals for discharging, one of the external terminals is provided exclusively for charging via the heat-sensitive element.

As mentioned above, this embodiment shows an assembled battery in which a secondary battery such as a nickel cadmium battery is used as a unit cell and a heat-sensitive element is attached. The thermostat is wound and fixed with, for example, aluminum tape 9, and is arranged in a valley 10 formed between battery rows. The outer can 2 is normally covered with a paper tube 11 for insulation, but a part of the outer can 2' is exposed, and the thermostat 8 is attached to this exposed part.

One end of the thermostat 8 is connected to the lead wire 12.
It is connected to the negative external terminal plate 6 via a lead wire 13, and the other end is connected to a negative terminal plate 14 exclusively for charging, which is fixed to the insulator 4 through a lead wire 13.

According to the assembled battery of the present invention, a battery group is formed by arranging a plurality of secondary batteries connected in series in two rows, an insulator placed on an end face of the battery group and provided with a pair of through holes; A positive and negative terminal plate extends along the outer surface of the insulator through each through hole, presses and fixes the insulator, and has one end fixed to the end face of each row, and a charging station fixed to the insulator. A dedicated terminal board, and a heat-sensitive element arranged between the two rows of valleys of the battery group, one end of which is connected to either the positive terminal board or the negative terminal board, and the other end of which is connected to the charging-only terminal board. As a result, the insulator that protects the end face of the battery group can be easily fixed, and the mechanical structure of the external terminal part can be easily fixed compared to the conventional structure in which the external terminal is simply led out by leading wires. The target strength is significantly improved. In addition, by arranging the heat-sensitive elements between the two rows of battery groups, the external size of the assembled battery does not increase.Furthermore, by fixing the charging-only terminal board to the insulator, a support for supporting the charging terminal board is provided. Since there is no need to use a separate member, an assembled battery having three external terminals can be easily created, and there is an advantage that the assembled battery can be made smaller.

[Brief explanation of the drawing]

The drawings are all related to the present invention; FIG. 1 is an enlarged perspective view of the assembled battery of the present invention, and FIG. 2 is an exploded perspective view of the constituent elements. 1...Battery group, 2...Battery, 2'...Exterior can,
4... Insulator, 40... Communication groove, 41, 42...
Through hole, 5, 6... Positive and negative terminal plate, 8... Thermostat, 9... Aluminum tape, 14...
Terminal board for charging only.

Claims (1)

[Scope of utility model registration request] A battery group formed by arranging a plurality of secondary batteries connected in series, an insulator placed on the end face of the battery group and provided with a pair of through holes, and an insulator formed through each of the through holes. positive and negative terminal plates extending along the outer surface of the insulator to press and fix the insulator and having one end fixed to the end face of each row; a charge-only terminal plate fixed to the insulator; and the battery group. and a heat-sensitive element arranged between two rows of valleys, one end of which is connected to either one of the positive terminal plate and the negative terminal plate, and the other end of which is connected to the charging-only terminal plate.