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Power supply device and electric vehicle

A technology for power supply devices and power storage equipment, which can be applied in the direction of power consumption devices, circuit devices, electric vehicles, etc., and can solve the problem of not being able to suppress the temperature deviation of the unit well

Inactive Publication Date: 2010-03-10
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the above-mentioned method has the disadvantage that if the configuration of the power supply unit or the ambient temperature is unknown, the temperature variation of the unit cannot be suppressed well.

Method used

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  • Power supply device and electric vehicle
  • Power supply device and electric vehicle
  • Power supply device and electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 【0019】

[0052] figure 2 It is a circuit diagram showing Embodiment 1 of the power supply device of the present invention. Power storage devices V1 , V2 , V3 , FETs (Field Effect Transistors) 1 , 2 as switching elements, PTC 3 , and resistors 11 , 12 as temperature detection units are provided in power supply device 101 . Since the same circuit is used for each of the power storage devices V1 to V3, the power storage device V1 will be described below.

[0053] 【0020】

[0054] like figure 2 As shown, the source side of FET1 is connected to one end of resistor 11 and the source side of FET2. In addition, the drain side of FET1 is connected to load 10 and other power storage devices V2 to V3. In addition, the gate side of the FET1 is connected to the other end of the resistor 11 and one end of the resistor 12 .

[0055]【0021】

[0056] The source side of FET2 is connected to one end of resistor 11 and the source side of FET1. In addition, the drain side of FET2 is...

Embodiment 2

[0072] 【0029】

[0073] use Figure 4 A method of using the bipolar transistor 4 of the second embodiment will be described. In addition, since the same circuit is used for each electric storage devices V1-V3, V1 is demonstrated below.

[0074] 【0030】

[0075] Figure 4 It is a circuit diagram showing Embodiment 2 of the power supply device of the present invention. The power supply unit 102 differs from the first embodiment in that the connection between the bipolar transistor 4 and the resistor 13 and the PTC 3 is used.

[0076] 【0031】

[0077] One end of PTC3 is connected to the positive side of power storage device V1 and the drain side of FET2. In addition, the other end of PTC3 is connected to one end of resistor 13 and the base side of bipolar transistor 4 .

[0078] 【0032】

[0079] The collector side of bipolar transistor 4 is connected to the other end side of resistor 12 . In addition, the emitter side of the bipolar transistor 4 is connected to the other end...

Embodiment 3

[0095] 【0040】

[0096] In the above-mentioned Embodiment 1 and Embodiment 2, although the example of using the PTC3 whose resistance increases as the temperature rises is given, in Embodiment 3, as Figure 5 As shown in the temperature characteristics of the thermistor 5 of , the case of using the thermistor 5 whose resistance decreases as the temperature rises will be described. Also, in the third embodiment, an NTC is used as the thermistor 5 . In addition, since the same circuit is used for each electric storage devices V1-V3, V1 is demonstrated below.

[0097] 【0041】

[0098] Image 6 It is a circuit diagram showing Embodiment 3 of the power supply device of the present invention. The difference between the power supply device 103 and the above-mentioned second embodiment is that a resistor 14 is arranged at the position of the PTC 13 , and a thermistor 5 is arranged at the position of the resistor 13 .

[0099] 【0042】

[0100] With this configuration, when the tempe...

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PUM

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Abstract

Provided is a power supply device having a plurality of electric storage devices connected in parallel. The power supply device is provided with a temperature detecting section for detecting the temperature of each electric storage device; a switch element connected in series to each electric storage device, and a control section for controlling the on-state and off-state of the switch element. The control section brings the switch element into the off-state when the temperature detected by the temperature detecting section is higher than a prescribed temperature.

Description

technical field [0001] 【0001】 [0002] The present invention relates to a power supply device used by connecting a plurality of power storage devices in parallel, and an electric vehicle including the power supply device. Background technique [0003] 【0002】 [0004] Conventionally, a high-voltage, high-capacity power supply device that connects a plurality of power storage devices in series or in parallel has been proposed. figure 1 It is a circuit diagram of a power supply device 100 in which a plurality of power storage devices V1 to V3 are connected in parallel. exist figure 1 In the power supply device 100 of , conventional power storage devices V1 to V3 having different internal resistances R1 to R3 are connected in parallel to supply electric power to the load 10 . [0005] 【0003】 [0006] because figure 1 The internal resistances R1 to R3 of the respective power storage devices V1 to V3 are different, so the currents flowing in the respective power storage devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/10H01M10/50H01M10/44B60L11/18H01M10/60H01M10/613H01M10/617H01M10/625H01M10/633H01M10/637H01M50/249H02J7/00
CPCY02E60/12Y02T10/7055B60L11/1864H01M2200/105H02J7/0026H01M10/482Y02T10/7005B60L3/0046Y02T10/7061B60L11/1872H01M2200/106B60L58/21B60L58/25H02J7/0014Y02T10/70Y02E60/10H02J7/00309H01M10/63H01M10/48H01M10/625H01M2220/20
Inventor 濑尾和宏阿部裕司
Owner SANYO ELECTRIC CO LTD