Pouch cell

一种电池、电路的技术，应用在袋装电池领域，能够解决电池存在安全隐患等问题

Active Publication Date: 2016-11-30
FUNENG TECH (USA) CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In conclusion, pouch batteries are a safety hazard especially under abuse conditions

Method used

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Examples

Experimental program
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Effect test

Embodiment approach

[0048] According to a preferred embodiment of the present invention, the fault switch is a pressure switch.

[0049] Pressure Switch

[0050] According to the present invention, preferably, the pressure switch should have one or more of the characteristics listed below:

[0051] (1) It should be reversible so that once the battery is vented it will prevent the battery from continuing to discharge through the heating element.

[0052] (2) It should activate rapidly within a narrow pressure range.

[0053] (3) It should be designed with the ability to adapt to different pressure responses.

[0054] (4) It should be designed to have the ability to adapt to different battery types.

[0055] (5) It should be free from accidental triggering.

[0056] (6) It should be easy to attach to the battery and have high reliability and yield.

[0057] (7) Its cost should be lower

[0058] As mentioned above, the pressure switch of the present invention can be triggered by excessive pres...

Embodiment 1

[0084] This example is used to illustrate the pouch battery of the present invention.

[0085] like Figure 7 and Figure 8 As shown, a pouch battery of about 2Ah was assembled, wherein a nickel-chromium alloy wire with a length of about 1 cm and a diameter of about 0.1 mm was used as the heating element, and it was placed on the sealing area outside the pouch battery. The natural void that exists between the jelly roll and the sealed side of the tab acts as a pressure mechanism as the pouch cell expands. A sheet of copper foil was placed across the void so that it was positioned opposite the copper foil attached to the cell frame supporting the cell. The positive tab is connected by wire to the copper foil on the frame (opposite the copper foil applied to the battery). The copper foil on the pouch battery is connected to the nickel-chromium alloy wire along the outer edge of the battery cup. The other end of the nickel-chromium alloy wire is connected to the negative term...

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Abstract

The present invention relates to the field of battery cells, particularly to a pouch cell comprising a packaging seal, a heating element and a fault switch, wherein the fault switch will activate the heating element to generate heat to make the packaging seal delaminate when the inner space of the pouch cell reaches a predetermined pressure, such that the pouch cell vents. The mechanism and components of these venting concepts can be designed to be fully compatible with existing manufacturing methods and typical cell handling situations. The most favorable configuration has both vent device components outside the cell, with nothing passing through or even into the seal. Such a configuration has the advantage of having no impact on the seal integrity relative to a conventional pouch cell, is easy to manufacture, and has improved safety.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a bagged battery. Background technique [0002] The use of lithium-ion batteries in consumer electronics has quadrupled over the past 10 years as pouch batteries continue to improve. The current annual revenue of the market is close to 1 billion US dollars. With the foreseeable introduction of larger lithium-ion batteries in applications such as hybrid electric vehicles (HEVs), there is a potential for substantial growth in orders across the market over the next 20 years. Lithium-ion batteries currently come in a variety of forms. They can be broadly categorized as cylindrical batteries (batteries with a hard stainless steel case and crimped or laser welded heads), prismatic batteries (flat cells with a hard case and laser welded heads), and pouch batteries ( flat cells in thin aluminum laminate packaging). Cylindrical batteries are commonly used in computers and other portable elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M10/0525H01M50/105H01M50/119H01M50/121H01M50/129H01M50/133
CPCH01M10/0525H01M50/317H01M50/105H01M50/129H01M50/119H01M50/121H01M50/133H01M2200/20Y02E60/10H01M50/103H01M50/375
Inventor K·D·开普勒A·W·拉森
Owner FUNENG TECH (USA) CO
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