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Backup power supply device for vehicle

A backup power supply, vehicle-mounted technology, applied in the direction of circuit devices, battery circuit devices, emergency power supply arrangements, etc., can solve the problem of inability to carry out electrical actions of the load, and achieve the effect of simple structure

Pending Publication Date: 2021-12-17
AUTONETWORKS TECH LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the power supply system for vehicles, when a failure state such as interruption of power supply from the main power supply occurs, power is not supplied to the load, and the electrical operation of the load cannot be performed.

Method used

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  • Backup power supply device for vehicle
  • Backup power supply device for vehicle
  • Backup power supply device for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] [Structure of power supply unit]

[0051] The vehicle-mounted backup power supply device 1 (hereinafter also referred to as the power supply device 1 ) according to Embodiment 1 is used as an output for an electric drive device (such as an electric motor) in a vehicle such as a hybrid car or an electric vehicle (EV (Electric Vehicle)). A power source of electric power for driving. Such as figure 1 As shown, the power supply device 1 has a battery unit 10 , a discharge circuit 11 , a balancing circuit 70 , and a control unit 12 . The battery unit 10 is formed by electrically connecting a plurality of unit cells 10A in series. The unit battery 10A uses, for example, a lithium ion storage battery or the like. The battery part 10 has an inter-battery electrode part 10B and an end electrode part 10C. The inter-battery electrode portion 10B is a portion where adjacent unit cells 10A are electrically connected in series. The end electrode portion 10C is an electrode on th...

Embodiment approach 2

[0082] Next, refer to Figure 6 A vehicle-mounted backup power supply device 2 (hereinafter also referred to as a power supply device 2 ) according to Embodiment 2 will be described. The power supply device 2 has a plurality of equalizing circuits 170, the equalizing circuit 170 corresponds to each battery pack that divides the battery unit 110 into a plurality of unit battery packs 110A, 110B, the structure of the third conductive circuit 131A, and the first circuit unit The structure of 130 is different from that of the first embodiment. The same reference numerals are assigned to the same structures as those in Embodiment 1, and descriptions of structures, operations, and effects are omitted.

[0083] [Structure of power supply unit]

[0084] The battery unit 110 is formed by connecting a plurality of unit cells 10A in series. The battery unit 110 has a plurality of unit battery packs 110A, 110B.

[0085] The balancing circuit 170 is provided corresponding to each of th...

Embodiment approach 3

[0102] Next, refer to Figure 7-9 A vehicle-mounted backup power supply device 3 (hereinafter also referred to as a power supply device 3 ) according to Embodiment 3 will be described. The power supply device 3 is different from the second embodiment in the configuration of the equalization circuit 270 and the like. The same reference numerals are assigned to the same structures as those in Embodiment 2, and descriptions of structures, operations, and effects are omitted.

[0103] [Structure of power supply unit]

[0104] The power supply device 3 includes a plurality of equalization circuits 270 . Each equalization circuit 270 has a switching unit 272 and a power storage unit 271 . Switching unit 272 has a plurality of switch groups 272A. Each switch group 272A has a first switch element 272B and a second switch element 272C. For the first switching element 272B and the second switching element 272C, for example, a MOSFET or the like is used. Power storage unit 271 diff...

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PUM

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Abstract

Provided is technology with which it is possible to perform a backup operation during failure without using a dedicated backup power supply. A backup power supply device (1) for a vehicle comprises: a battery unit (10) in which a plurality of unit batteries (10A) are connected in series; a discharge circuit (11) that performs a first discharge operation for supplying power to a third conductive path (31A) on the basis of a charge accumulated in the battery unit (10); a balance circuit (70) that performs a cell balance operation on the battery unit (10); and a control unit (12) that controls the balance circuit (70). The balance circuit (70) is configured to perform a second discharge operation for supplying power to the third conductive path (31A) on the basis of a charge accumulated in a plurality of power storage elements (71A). The control unit (12) performs first control for causing the balance circuit (70) to perform the cell balance operation, and second control for causing the balance circuit (70) to perform the second discharge operation. The control unit causes the second control to be performed when a failure has occurred whereby the first discharge operation could not be performed normally.

Description

technical field [0001] The present disclosure relates to a vehicle backup power supply device. Background technique [0002] When a power supply system for a vehicle is in a failure state where the power supply from the main power supply is cut off, power is no longer supplied to the load, and the load cannot be electrically operated. However, depending on the load, continuation of the operation may be strongly required. Therefore, a configuration in which a dedicated backup power supply separate from the main power supply is provided separately is known as a configuration responding to such a requirement. Patent Documents 1 and 2 disclose an example of such a power supply system. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2018-13136 [0006] Patent Document 2: Japanese Patent Laid-Open No. 2018-62253 [0007] Patent Document 3: International Publication No. 2015 / 105923 Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/34H02J7/14H02J9/06B60R16/033
CPCH02M3/00B60R16/033H02J7/0016H02J7/0063H02J2207/20H02J9/061H02J2310/46
Inventor 内田幸贵
Owner AUTONETWORKS TECH LTD