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Cell assembly and battery system

A technology for battery systems and battery packs, applied in the field of battery systems, can solve the problems of increased interval, decreased battery capacity, increased internal resistance, etc., and achieves the effect of easy wiring and connection operation and compact assembly.

Inactive Publication Date: 2012-11-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In a laminated lithium secondary battery, if the gap between the laminated positive electrode plate and negative electrode plate becomes large due to gas generated inside the battery can, etc., causing the battery can to expand, the internal resistance will change. Large and there is a risk of battery capacity drop
In addition, in addition to the deformation of the battery cans of each secondary battery (single cell), if the structure of the stacked battery pack is misaligned or deformed, the connection terminal parts connecting the respective battery cans are deformed or damaged, so there is a problem that cannot be achieved. Desired battery capacity at risk

Method used

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  • Cell assembly and battery system
  • Cell assembly and battery system
  • Cell assembly and battery system

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Embodiment Construction

[0071] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same reference numerals are used for the same components, and detailed description thereof will be appropriately omitted.

[0072] use figure 1 , figure 2 The battery pack M1 according to this embodiment will be described. figure 1 is a schematic cross-sectional view showing the overall structure of the assembled battery M1 of the first embodiment, figure 2 It is a rough plan view. The battery pack M1 is configured to exert a large battery capacity by connecting a plurality of single cells composed of laminated secondary batteries, such as figure 1 As shown, a plurality of, for example, four battery cells RB1 , RB2 , RB3 , and RB4 are stacked and integrally connected to form a battery pack M1 .

[0073] Furthermore, connecting members 7 ( 7A) are respectively inserted on both sides of the side on which the external terminals 11f ( 11fa , 11fb ) are...

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Abstract

The present invention provides a cell assembly and a battery system. The cell assembly can compactly link single cells composed of secondary cells, can securely fix the single cells in place so as not to become misaligned with each other, and can facilitate wiring connection. In order to obtain the battery system in which cell assembly modules using the cell assembly can be compactly assembled, and wiring connection and other operations can be facilitated, a joint (21) between a cover member (12) and an exterior case (11) protrudes outward from an external peripheral edge of the exterior case, a plurality of secondary cells are stacked along a vertical direction of a laminating direction, and linking members (7) for linking the plurality of secondary cells together into a single unit by clamping the stacked top-level joint and bottom-level joint are interposed, thus cell assemblies (M1-M4) are formed, and a battery system (BS) is formed by vertically connecting a plurality of modularized cell assembly modules (MJ) in which a circuit unit (80) is combined into a single unit on one side of each cell assembly.

Description

technical field [0001] The present invention relates to a battery pack in which a plurality of secondary batteries are connected, and a storage battery system using the battery pack. Background technique [0002] Lithium secondary batteries have been used as power supply batteries for portable electronic devices such as mobile phones and notebook personal computers in recent years because they have high energy density and can be reduced in size and weight. In addition, since the capacity can be increased, it is also attracting attention as a motor drive power supply or power storage battery for electric vehicles (EV) and hybrid electric vehicles (HEV). [0003] The above-mentioned lithium secondary battery accommodates an electrode group in which a positive electrode plate and a negative electrode plate are arranged facing each other across a separator plate, is filled with an electrolytic solution, and has positive electrode current collecting tabs ( tab) connected positiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M2/30H01M10/058H01M50/528H01M50/51H01M50/514
CPCY02E60/12H01M2/202H01M2/22H01M10/0486H01M10/0585Y02E60/10H01M50/528Y02P70/50H01M50/514H01M50/51
Inventor 冈野哲史佃至弘
Owner SHARP KK
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