摘要:
A method for detecting a minor short in at least one of a plurality of cells of a battery pack includes: a first step of measuring a voltage of at least one of the plurality of cells in a process of charging the battery pack; a second step of measuring a voltage of the at least one of the plurality of cells in a process of discharging the battery pack; and a third step of detecting the minor short in the at least one of the plurality of cells based on measurement results from the first step and the second step.
a first radiating element; a second radiating element located opposite said first radiating element; and an earth on the opposite side to the first radiating element with respect to the second radiating element, and opposite the second radiating element, wherein the first radiating element or the second radiating element is equipped with a feed terminal, and electric fields are generated at least between the first radiating element and the second radiating element, and between the second radiating element and the earth, and electric wave transmission and reception is performed.
摘要:
A top-loaded monopole antenna apparatus having a feeding point is provided for use in a communication system such as a mobile communication system or the like. The top-loaded monopole antenna apparatus includes a grounding conductor, a top-loading electrode, a linear conductor element, and a short-circuit conductor. The top-loading electrode is provided so as to oppose to the grounding conductor. The linear conductor element electrically connects the feeding point with the top-loading electrode, and the short-circuit conductor electrically connects the top-loading electrode through a reactive element to the grounding conductor. This structure leads to a height lower than that of prior art, and easy impedance matching.
摘要:
A battery pack controlling apparatus for controlling input to or output from a battery pack is provided. The battery pack includes a plurality of blocks in series connection. Each of the plurality of blocks includes a plurality of batteries in series connection. The battery pack controlling apparatus includes: a battery power input/output section for controlling input and output of battery power to and from the battery pack; a block voltage detection section for detecting a block voltage of each of the plurality of blocks; a battery current detection section for detecting a battery current of the battery pack; an unusual heating detection section for detecting unusual heating of at least one of the plurality of batteries based on the block voltage and the battery current; and a vehicle controlling section for controlling the battery power input/output section based on results of unusual heating detection by the unusual heating detection section. The unusual heating detection section includes an internal resistance calculation section for calculating an internal resistance of each of the plurality of blocks based on the block voltage and the battery current. The unusual heating detection section detects unusual heating of the at least one of the plurality of batteries based on the internal resistance of each of the plurality of blocks and a predetermined threshold value.
a first radiating element; a second radiating element located opposite said first radiating element; and an earth on the opposite side to the first radiating element with respect to the second radiating element, and opposite the second radiating element, wherein the first radiating element or the second radiating element is equipped with a feed terminal, and electric fields are generated at least between the first radiating element and the second radiating element, and between the second radiating element and the earth, and electric wave transmission and reception is performed.
摘要:
A method for detecting an abnormal cell in a battery system, wherein: the battery system includes a plurality of blocks serially connected together; each of the plurality of blocks includes a plurality of cells serially connected together; and the method includes: a first step of detecting a block voltage for each of the plurality of blocks and detecting a current of the battery system; a second step of calculating a charge/discharge electric power for each of the plurality of blocks based on the block voltage and the current; a third step of determining whether or not a value of the current is equal to or greater than a first predetermined value; a fourth step of determining whether or not a difference of the charge/discharge electric power between at least any two of the plurality of blocks is equal to or greater than a second predetermined value; and a fifth step of detecting a block including an abnormal cell based on determination results from the third step and the fourth step.
摘要:
In an ultrasonic transmitter-receiver for an apparatus for measuring the position or distance of an object, a composite vibrating unit is constructed with a piezoelectric vibrator (10) and a cone (11), wherein a substantial conical vertex of the cone is connected to a center of vibration of the piezoelectric vibrator, and a node of vibration (17) is generated on the cone at positions symmetrical about its center axis when the piezoelectric vibrator vibrates with deflection.