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Battery with external terminals

An external terminal and battery technology, applied in the directions of large-sized cells/battery packs, small-sized cells/battery packs, battery pack components, etc., can solve the problems of insufficient heat transfer and inability to ensure the welding strength of battery boxes. , to achieve the effect of improving welding operability and reducing the impact

Active Publication Date: 2019-09-13
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be noted that if the gap between the external terminal and the battery case is large, the heat during welding cannot be sufficiently transmitted to both the external terminal and the battery case, so that the gap between the external terminal and the battery case cannot be ensured. Possibility of welding strength

Method used

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  • Battery with external terminals
  • Battery with external terminals
  • Battery with external terminals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0068] (the whole frame)

[0069] figure 1 It is a plan view showing a schematic configuration of a battery 1 with external terminals according to Embodiment 1 of the present invention. figure 2 It is a side view showing a schematic configuration of the battery 1 with external terminals. image 3 yes figure 1 The III-III line sectional view in. It should be noted that, image 3 In the battery 1 with an external terminal, the part other than the electrode body 40 is shown in cross section.

[0070] In the battery 1 with external terminals, the external terminals 3 are attached to the flat battery 2 (battery) by welding, so that electric power can be supplied from the flat battery 2 to devices not shown through the external terminals 3 . That is, the battery 1 with external terminals has a flat battery 2 and external terminals 3 .

[0071] It should be noted that, as will be described later, the battery 1 with external terminals can be obtained by attaching the external t...

Embodiment approach 2

[0170] Figure 16 A schematic configuration of the external terminal 703 of the battery with an external terminal according to Embodiment 2 is shown. The external terminal 703 in this embodiment differs from the configuration of the first embodiment in that the connecting portion 762 is connected to the inner peripheral side of the outer peripheral portion 761 .

[0171] Such as Figure 16 As shown, the external terminal 703 has an outer peripheral portion 761 , a connecting portion 762 (protruding portion), and a connecting portion 763 . The configurations of the outer peripheral portion 761 and the connecting portion 763 are the same as those of the outer peripheral portion 61 and the connecting portion 63 of the external terminal 3 according to Embodiment 1, and thus detailed description thereof will be omitted.

[0172] The connecting portion 762 extends in the radial direction with respect to the annular outer peripheral portion 761 , and connects opposing portions on t...

Embodiment approach 3

[0183] Figure 17 A schematic configuration of an external terminal 803 of a battery with an external terminal according to Embodiment 3 is shown. The outer peripheral portion 861 of the external terminal 803 in this embodiment is arc-shaped, and two protruding portions 862 are provided at both ends of the outer peripheral portion 861, and the overall shape is not annular. This point is different from that of the embodiment. The composition of 1 is different.

[0184] Such as Figure 17 As shown, the external terminal 803 has an outer peripheral portion 861 , a protruding portion 862 and a connecting portion 863 . The configuration of the connection portion 863 is the same as that of the connection portion 63 of the external terminal 3 according to Embodiment 1, and thus detailed description thereof will be omitted.

[0185] The outer peripheral portion 861 is arc-shaped in plan view. The protruding portions 862 are formed at both end portions in the circumferential direct...

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Abstract

The present invention achieves a configuration that can improve weldability for external terminals of a battery with external terminals in which the external terminals are attached to the battery by welding. A positive electrode can-side bottom surface part 11 and a negative electrode can-side bottom surface part 21 of a flat battery 2 have a positive electrode can-side attachment surface 15 and anegative electrode can-side attachment surface 25 to which external terminals 3 are attached by welding. With respect to the positive electrode can-side attachment surface 15 and the negative electrode can-side attachment surface 25, the external terminals 3 each have: an outer circumference section 61 that is formed so as to overlap a region which is outside a line 1 / 2 the distance from the center to the outer edge and so as to not overlap a region which is inside the line 1 / 2 the distance from the center to the outer edge when the positive electrode can-side attachment surface 15 and the negative electrode can-side attachment surface 25 are viewed in a direction normal thereto; protruding sections 62 that are formed so as to protrude from the outer circumference section 61 toward the inside of the flat battery 2; and a connection section 63 that is formed so as to protrude from the outer circumference section 61 toward the region outside the flat battery 2 and that electrically connects the flat battery 2 to a device. The protruding sections 62 have welded sections 62a that are welded to the attachment surfaces of the flat battery 2.

Description

technical field [0001] The present invention relates to a battery with external terminals mounted to the battery by welding. Background technique [0002] Batteries with external terminals are known in which the external terminals are attached to the battery by welding. In this battery with an external terminal, electric power is supplied to the device from the battery by electrically connecting the external terminal to the device. As such a battery with external terminals, for example, Patent Document 1 discloses a flat nonaqueous electrolyte secondary battery with lead terminals in which a battery case of the flat nonaqueous electrolyte secondary battery is welded with a Lead terminals. [0003] The above-mentioned Patent Document 1 discloses that the above-mentioned lead terminal is a strip-shaped or ring-shaped metal plate. In Patent Document 1, the welding position of the lead terminal to the battery is the peripheral portion of the battery case avoiding the portion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/30H01M2/02H01M50/109H01M50/181H01M50/548H01M50/559H01M50/562H01M50/566
CPCY02E60/10H01M50/566H01M50/109H01M50/559H01M50/552H01M50/562H01M50/181H01M50/548B23K26/21
Inventor 竹内恭平
Owner MAXELL HLDG LTD
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