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Battery packs, battery packs and vehicles

A battery pack and battery pack technology, applied in battery/battery traction, battery electrodes, small flat batteries/batteries, etc., can solve problems such as failure to achieve practical application and decrease in battery output density

Active Publication Date: 2020-09-08
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the output density of the battery decreases, so it has not yet reached practical use.

Method used

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  • Battery packs, battery packs and vehicles
  • Battery packs, battery packs and vehicles
  • Battery packs, battery packs and vehicles

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0037] Figure 1 ~ Figure 4B The first embodiment is shown in . figure 1 It is a vertical cross-sectional view showing a schematic configuration of the entire assembled battery 1 of the present embodiment. The assembled battery 1 of the present embodiment has an exterior member (case) 2 and a battery main body 3 housed in the exterior member 2 . The exterior member 2 can be a member having a structure described later, for example, formed of a laminated film in which a metal layer is sandwiched between two resin films.

[0038] In the battery main body 3, two nonaqueous electrolyte batteries (the first nonaqueous electrolyte battery 4 and the second nonaqueous electrolyte battery 5) are stacked, and the first nonaqueous electrolyte battery 4 and the second nonaqueous electrolyte battery 5 of the stack A sheet-shaped lead 6 having an area larger than that of the surface facing the non-aqueous electrolyte battery is disposed therebetween. Here, lead wire 6 is made of aluminum ...

no. 2 Embodiment approach

[0086] Figure 5A , Figure 5B and Image 6The second embodiment is shown. The assembled battery 101 of the present embodiment has the same configuration as that of the first embodiment (refer to Figure 1 ~ Figure 4B ) five nonaqueous electrolyte batteries 102 identical to the first nonaqueous electrolyte battery 4 (or the second nonaqueous electrolyte battery 5) in the assembled battery 1; .

[0087] The battery main body 104 of this embodiment is as Figure 5A As shown, the non-aqueous electrolyte batteries 102 are connected in series in a straight line in a state where the sheet-shaped lead wires 103 are sandwiched between each of the non-aqueous electrolyte batteries 102 to form a series connection body 105 . Then, the linear series connection body 105 such as Figure 5B As shown, they are stacked alternately to form a laminated body 106 . Such as Image 6 As shown, the laminated body 106 is accommodated inside the exterior member 107 in the state.

no. 3 Embodiment approach

[0089] Figure 7 The third embodiment is shown. The assembled battery 201 of this embodiment has the same configuration as that of the first embodiment (refer to Figure 1 ~ Figure 4B ) of the same first nonaqueous electrolyte battery 4 and second nonaqueous electrolyte battery 1. In the assembled battery 201 of the present embodiment, a positive electrode tab stacked portion 19 a formed by stacking three positive electrode tabs 19 of the first non-aqueous electrolyte battery 4 is provided. The positive electrode tab laminated portion 19a is fixed to one end portion of the lead wire 6 constituting a bent portion having a radius R by, for example, welding ( Figure 7 The surface of middle left end) ( Figure 7 upper middle surface) to connect. In addition, a negative electrode tab laminated portion 18 a formed by laminating four negative electrode tabs 18 of the second nonaqueous electrolyte battery 5 is provided. The negative electrode tab laminated portion 18a is fixed t...

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Abstract

Embodiments of the present invention relate to an assembled battery, a battery pack, and a vehicle. Embodiments provide an assembled battery and a battery pack capable of preventing liquid conduction between single cells when the cells are connected in series inside the battery. A battery pack according to an embodiment includes a plurality of stacked non-aqueous electrolyte batteries (4, 5) and at least one lead (6) arranged between two adjacent batteries and electrically connected to the batteries. The plurality of batteries respectively comprise at least one positive electrode (10), at least one negative electrode (9) and a non-aqueous electrolyte. The positive electrode includes a current collector and positive electrode active material layers provided on both surfaces of the current collector. The negative electrode includes a current collector and negative electrode active material layers provided on both surfaces of the current collector. An area of ​​an opposing surface of the lead wire opposing the two batteries is set larger than an area of ​​a surface opposing the opposing surface of the lead wire in each of the two batteries.

Description

technical field [0001] Embodiments of the present invention relate to an assembled battery, a battery pack, and a vehicle. Background technique [0002] In recent years, research and development of non-aqueous electrolyte batteries such as lithium-ion secondary batteries have been widely carried out as high-energy-density batteries. Non-aqueous electrolyte batteries are expected to be used as power sources for hybrid vehicles, electric vehicles, and uninterruptible power supplies for cellular phones and local area stations. However, even if the single cell of the lithium ion secondary battery is enlarged, the voltage obtained from the single cell is as low as about 3.7V. Therefore, in order to obtain a high output, it is necessary to extract a large current from an enlarged single cell, so there is a problem of increasing the size of the entire device. [0003] As a battery that solves these problems, a bipolar battery has been proposed. A bipolar battery is a method in w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/0585H01M2/20H01M50/178H01M50/211H01M50/296H01M50/517H01M50/528H01M50/533H01M50/54H01M50/548H01M50/553
CPCH01M10/058H01M10/0585H01M2220/20H01M50/553H01M50/517H01M50/178H01M50/296H01M50/211H01M50/533H01M50/548H01M50/54H01M10/0413H01M10/0436B60L50/64Y10S903/907B60L58/10Y02T10/70Y02E60/10H01M50/528Y02P70/50H01M4/131H01M10/0565H01M10/4257H01M2300/0082H01M2300/0085H01M50/20H01M50/531H01M50/502H01M50/543B60L3/0046B60L7/10H01M10/425H01M10/441
Inventor 吉间一臣原田康宏高见则雄
Owner KK TOSHIBA