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Battery operated device

A battery application and equipment technology, which is applied in the direction of secondary batteries, battery pack components, and isolation of batteries from their environment. It can solve problems such as temperature rise, fire, and heat generation, and achieve the effects of improving safety and reducing costs.

Inactive Publication Date: 2007-07-25
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the batteries shown in FIG. 6 and FIG. 7, since the exhaust valves 55, 67 are arranged on the upper walls 54, 64 of the battery cases 53, 62, even if the exhaust valves 55, 67 are opened, the battery 52 , 61 still has the electrolyte solution before gasification, and as a result, the battery function continues to be displayed, and the overcharging continues. In the worst case, it may cause heat and smoke.
In order to avoid this phenomenon, a diaphragm with a shut-off function is sometimes used. The structure of the diaphragm is designed to close the tiny pores flowing through the electrolyte when the temperature rises, but the problem is that the charging current cannot be completely zero , so charging for a long time will cause the temperature to rise continuously. If the thermal runaway temperature of the positive or negative electrode material is reached, it will also cause smoke and fire.

Method used

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Experimental program
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no. 1 Embodiment approach

[0034] First, a battery pack mounted in a battery application device according to a first embodiment of the present invention will be described with reference to FIG. 1 . In FIGS. 1( a ) and ( b ), the battery pack 1 is composed of a plurality of batteries 2 such as lithium ion batteries, and each battery 2 is constituted by accommodating a positive electrode, a negative electrode, a separator, and an electrolytic solution in a battery case 3 . The battery pack 1 is installed in any battery application equipment (not shown) in the posture shown in FIG. 1( a ). In addition, when the battery application device (not shown) is a fixed device, or a device that maintains a constant vertical posture even if it is a mobile or movable body, the arrangement posture of the battery pack 1 is as shown in FIG. 1(a) The posture is fixed, and the present invention can be effectively brought into play. On the other hand, in the case of a mobile or movable body, if it is a device whose posture...

no. 2 Embodiment approach

[0041] Next, a second embodiment in which the present invention is applied to a battery pack mounted on a hybrid vehicle will be described with reference to FIGS. 2 to 4 .

[0042] As shown in FIG. 4, a hybrid vehicle 10 as a battery application device is configured to drive wheels 13 with either or both of an engine 11 and an electric motor 12. The electric motor 12 uses a battery pack 15 as a power source through an inverter 14. To be driven, the battery pack 15 is configured to be charged by the generator 16 driven by the engine 11 through the inverter 14 .

[0043] As shown in FIGS. 2 and 3 , the battery pack 15 is configured as follows: a battery pack 21 in which a plurality of rectangular batteries 22 are arranged in parallel, and positive terminals 24 are provided on the upper parts of both end surfaces in the longitudinal direction of each battery 22 . and the negative terminal 25, and each battery 22 is arranged side by side alternately and reversely, and each battery...

Embodiment 1

[0051] A specific example using a nonaqueous electrolyte secondary battery will be described.

[0052] (i) Preparation of positive electrode

[0053] Regarding the production of the positive electrode, the LiNi 1 / 3 mn 1 / 3 co 1 / 3 o 3 as a positive electrode active material. The positive electrode material uses lithium carbonate (LiCO 3 ) and nickel-manganese-cobalt eutectic hydroxide ((Ni Mn Co)OH 2 ) The positive electrode active material obtained by mixing according to the specified number of moles and calcining at 950° C. in an air atmosphere for 10 hours. In 100 parts by weight of the positive electrode active material, N-methylpyrrolidone of polyvinylidene fluoride is prepared in an amount of 3 parts by weight of acetylene black as a conductive material and 5 parts by weight of polyvinylidene fluoride as a binding material. solution, and after stirring and mixing, a paste-like positive electrode mixture was obtained. Next, aluminum foil with a thickness of 15 μm wa...

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Abstract

A battery operated device is equipped with one or more batteries each including a positive electrode, a negative electrode, a separator, and an electrolyte in a battery case. In this battery operated device, the battery has a gas vent that is opened due to an increase in pressure inside the battery case, and is configured to dispose the gas vent at a lower position thereof when installed in the battery operated device. Therefore, the battery function is ceased due to actuation of the gas vent.

Description

technical field [0001] The present invention relates to a battery-applied device with improved battery safety. Background technique [0002] As battery-applied devices that use batteries as power sources, there are known, for example, personal computers and mobile electronic devices, various home appliances, electric power-assisted bicycles, electric wheelchairs, motorcycles, automobiles, especially electric vehicles including hybrid vehicles, robots, And a wide variety of equipment for power supply and backup power supply. [0003] In recent years, secondary batteries used in these battery-applied devices have been increased in capacity and power, and the energy stored in the batteries has increased. Therefore, battery-applied equipment is designed to ensure safety by performing temperature control while performing charge and discharge control by a control circuit. In addition, a technique is known in which an exhaust valve is provided to prevent the battery itself from b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/12H01M2/10H01M50/209
CPCH01M2/1094H01M2/12H01M10/0566H01M2/1077Y02E60/10H01M50/30H01M50/24H01M50/209H01M50/10H01M50/20
Inventor 永山雅敏畑中刚藤田秀明
Owner PANASONIC CORP