Secondary battery state detection device and secondary battery state detection method
A state detection device and secondary battery technology, applied to secondary batteries, measuring devices, circuits, etc., can solve problems such as secondary battery abnormalities
Active Publication Date: 2019-06-07
FURUKAWA ELECTRIC CO LTD +1
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Problems solved by technology
In this case, there is a problem that since normal detection cannot be performed, it is wrongly determined that the secondary battery is abnormal, and the secondary battery is replaced even if it is not necessary.
Method used
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Embodiment Construction
[0031] Next, embodiments of the present invention will be described.
[0032] (A) Description of the structure of the embodiment
[0033] figure 1 It is a diagram showing a power supply system of a vehicle provided with a secondary battery state detecting device according to an embodiment of the present invention. In this figure, secondary battery state detection device 1 has a control unit 10 , a voltage sensor 11 , a current sensor 12 , a temperature sensor 13 , and a discharge circuit 15 as main components, and detects the state of a secondary battery 14 . Here, the control unit 10 detects the state of the secondary battery 14 with reference to outputs from the voltage sensor 11 , the current sensor 12 , and the temperature sensor 13 . The voltage sensor 11 detects the terminal voltage of the secondary battery 14 and notifies it to the control unit 10 . The current sensor 12 detects the current flowing in the secondary battery 14 and notifies it to the control unit 10 . ...
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An object of the present invention is to accurately detect the state of the secondary battery when the secondary battery is mounted on a vehicle. A secondary battery state detection device (1) for detecting the state of a secondary battery (14) mounted on a vehicle has: a first operation mode, which is an initial operation mode when the secondary battery is newly connected; and a second operation mode. 2. Operation mode, which is a normal operation mode after the first operation mode. The secondary battery state detection device includes: an initial state detection unit (control unit (10)), which transfers to the first operation mode when the secondary battery is connected. An operation mode that detects an initial state of the secondary battery with reference to a terminal voltage of the secondary battery; and a normal state detection unit (control unit (10)) that detects the state of the secondary battery at a predetermined time by the initial state detection unit , shifts to the second operation mode, and detects the normal state of the secondary battery based on the terminal voltage and charge and discharge current of the secondary battery.
Description
technical field [0001] The invention relates to a secondary battery state detection device and a secondary battery state detection method. Background technique [0002] Patent Document 1 discloses a technique for detecting SOC (State of Charge: state of charge) of a lead acid battery. In this technique, a relational expression between the terminal voltage and the discharge current is obtained in advance for a lead-acid storage battery whose SOC is known, and the coefficients of the relational expression are obtained according to the state when the SOC is different. In addition, the SOC of the lead-acid storage battery at any time can be obtained by applying the terminal voltage and the discharge current to the obtained relational expression. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2005-188965 Contents of the invention [0006] The problem to be solved by the invention [0007] However, in the ve...
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IPC IPC(8): G01R31/387
CPCG01R31/3828G01R31/3835Y02E60/10H01M10/48G01R31/3842
Inventor 石原英明佐藤悦藏
Owner FURUKAWA ELECTRIC CO LTD