Electrical storage device, method for estimating capacity of electrical storage element, and program for estimating capacity of electrical storage element
A technology for electric storage components and electric storage devices, which is applied in the direction of circuit devices, electrical components, battery circuit devices, etc., and can solve problems such as unstable capacity of electric storage components and inability to measure current and voltage of electric storage components
Pending Publication Date: 2021-10-29
GS YUASA INT LTD
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Problems solved by technology
If the measurement part cannot perform measurement, the current and voltage of the storage element cannot be measured, and the capacity of the storage element becomes unstable.
Method used
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Embodiment approach 1
[0039] 1. Description of battery 50
[0040] figure 1 is the side view of the vehicle, figure 2 It is an exploded perspective view of the storage battery. The vehicle 10 is an engine-driven vehicle and includes an engine 20 and a battery 50 . exist figure 1 In the diagram, only the engine 20 and the battery 50 are shown, and other components constituting the vehicle 10 are omitted. The storage battery 50 is an example of an "electricity storage device".
[0041] Such as figure 2 As shown, the storage battery 50 includes a battery pack 60 , a circuit board unit 65 , and a storage body 71 .
[0042] The storage body 71 includes a main body 73 and a lid body 74 made of a synthetic resin material. The main body 73 has a bottomed cylindrical shape. The main body 73 has a bottom portion 75 and four side portions 76 . An upper opening 77 is formed at an upper end portion of the four side surfaces 76 .
[0043] The storage body 71 houses the battery pack 60 and the circuit...
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An electrical storage device 50 is provided with: external terminals 51, 52; an electrical storage element 60; a switch 53 positioned in a current route 55P from the electrical storage element 60 to the external terminal 51; a measuring unit 150 for measuring current and voltage of the electrical storage element 60; and a managing unit 130. The measuring unit 150 and the managing unit 130 receive electric power supply from the electrical storage element 60. A lowest operation voltage V1 of the managing unit 130 is lower than a lowest operation voltage V2 of the measuring unit 150. The managing unit 130, if the voltage of the electrical storage element 60 is lower than a threshold value voltage V0 of more than or equal to the lowest operation voltage V2 of the measuring unit 150, controls the switch 53 to cut off external discharge via the external terminal 52, and, on the basis of an elapsed time from an arbitrary time point t1 in a first period in which the voltage of the electrical storage element 60 decreases from the threshold value voltage V0 to the lowest operation voltage V2 of the measuring unit 150, estimates a capacity of the electrical storage element 60 after the arbitrary time point t1.
Description
technical field [0001] The present invention relates to a technique for estimating the capacity of an electric storage element. Background technique [0002] Among the power storage devices, there is a power storage device that includes a measurement unit that measures the current and voltage of the power storage element, and a management unit that manages the power storage device. In Patent Document 1 below, it is described that electric power is supplied from an electric storage element to a measurement unit and a management unit. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2017-184534 Contents of the invention [0006] The problem to be solved by the invention [0007] When the electric storage element supplies electric power to the measurement unit, if the voltage of the electric storage element becomes lower than or equal to the minimum operating voltage of the measurement unit, the measurement ...
Claims
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IPC IPC(8): H01M10/44H01M10/48B60R16/04H02J7/00G01R31/382G01R31/385
CPCH01M10/48H01M2220/20H01M2010/4271H02J7/0048G01R31/388G01R31/3842G01R31/396G01R31/3828G01R19/16542H02J7/007182B60R16/033H01M10/425
Inventor 今中佑树
Owner GS YUASA INT LTD