Abstract: A gap inspection apparatus and a gap inspection method are disclosed. The gap inspection apparatus is configured for a wound battery cell, where in a height direction of the wound battery cell. The gap inspection apparatus includes: an X-ray source and an X-ray detector and a bearing mechanism located between the X-ray source and the X-ray detector. The bearing mechanism includes at least one accommodating groove, the accommodating groove is configured to accommodate the wound battery cell, and the height direction of the wound battery cell crosses a first direction in which the X-ray source points to the X-ray detector. The X-ray source is configured to irradiate an arc-shaped area of the wound body portion, and the X-ray detector is configured to obtain an imaging image of the irradiated arc-shaped area, so as to obtain a gap value between two electrode plates within the arc-shaped area.

Abstract: A gap inspection apparatus and a gap inspection method are disclosed. The gap inspection apparatus is configured for a wound battery cell, where in a height direction of the wound battery cell. The gap inspection apparatus includes: an X-ray source and an X-ray detector and a bearing mechanism located between the X-ray source and the X-ray detector. The bearing mechanism includes at least one accommodating groove, the accommodating groove is configured to accommodate the wound battery cell, and the height direction of the wound battery cell crosses a first direction in which the X-ray source points to the X-ray detector. The X-ray source is configured to irradiate an arc-shaped area of the wound body portion, and the X-ray detector is configured to obtain an imaging image of the irradiated arc-shaped area, so as to obtain a gap value between two electrode plates within the arc-shaped area.

Abstract: An inspection method includes obtaining an image of a corner region of the wound cell that includes an image of a cathode electrode plate at N layers of the corner region of the wound cell and an anode electrode plate at the N layers, and determining, based on the image of the corner region, amounts of misalignment between the cathode electrode plate and the anode electrode plate that are adjacent in the wound cell. N is a positive integer.

Abstract: The invention relates to a material hardness testing instrument, specifically to a portable digital display hardness tester, comprising a magnetic chuck, a support, a force measuring device, an indenter, an electronic circuit board, a digital display, and a force applying and indentation depth measuring device consisting of a hand wheel, a rotary encoder and a micrometric screw pair. The support is equipped with the rotary encoder. The micrometric nut is installed in a hole. The digital display is located in the front. The support is fixed on the magnetic chuck. The micrometric nut is internally provided with the micrometric screw. The rotating shaft of the rotary encoder is connected with the micrometric screw and rotates along with the micrometric screw. The upper end of the micrometric screw is connected with the hand wheel, while the lower end is connected with the force measuring device. The lower end of the force measuring device is connected with the indenter.

Abstract: The invention relates to a material hardness testing instrument, specifically to a portable digital display hardness tester, comprising a magnetic chuck, a support, a force measuring device, an indenter, an electronic circuit board, a digital display, and a force applying and indentation depth measuring device consisting of a hand wheel, a rotary encoder and a micrometric screw pair. The support is equipped with the rotary encoder, The micrometric nut is installed in a hole. The digital display is located in the front. The support is fixed on the magnetic chuck. The micrometric nut is internally provided with the micrometric screw. The rotating shaft of the rotary encoder is connected with the micrometric screw and rotates along with the micrometric screw. The upper end of the micrometric screw is connected with the hand wheel, while the lower end is connected with the force measuring device. The lower end of the force measuring device is connected with the indenter.