Detection apparatus and battery production device
View Patent ↗A detection apparatus and a battery production device are described. The detection apparatus includes a scanning frame, a radiation source, a detector, and a carrying platform. The radiation source and the detector are both connected to the scanning frame, and the detector is opposite an emission port of the radiation source. The carrying platform is located between the radiation source and the detector, where the radiation source and the detector can rotate around a same rotation axis, and a rotation direction of the radiation source is the same as a rotation direction of the detector, such that during rotation, the detector remains opposite the emission port of the radiation source, and the carrying platform is located between the radiation source and the detector. The carrying platform is configured to hold a to-be-tested battery. The detection apparatus can achieve detection of deformation of the to-be-tested battery.
1 . A detection apparatus for detecting battery deformation, comprising:
a scanning frame;
a radiation source connected to the scanning frame;
a detector connected to the scanning frame, wherein the detector is opposite an emission port of the radiation source; and
a carrying platform located between the radiation source and the detector, wherein the carrying platform is configured to hold a to-be-tested battery on a carrying surface;
wherein the radiation source and the detector are arranged for rotating around a same rotation axis, a rotation direction of the radiation source is the same as a rotation direction of the detector, such that during rotation, the detector remains opposite the emission port of the radiation source, and the carrying platform is located between the radiation source and the detector;
wherein the detection apparatus further comprises:
a controller, wherein the radiation source is electrically and/or communicatively connected to the controller, and the detector is electrically and/or communicatively connected to the controller;
wherein the controller is configured to:
control the radiation source and the detector to rotate around the rotation axis;
control, when the radiation source rotates, the radiation source to emit radiation that passes through the to-be-tested battery on the carrying platform and that is projected onto the detector;
acquire a detection image of the to-be-tested battery based on the radiation received by the detector; and
determine deformation information of the to-be-tested battery based on the detection image;
wherein the to-be-tested battery comprises a bottom surface, the bottom surface has a gluing region, and the controller is further configured to:
position the carrying platform such that the rotation axis is located on the carrying surface of the carrying platform during rotation of the radiation source and the detector to control the bottom surface of the to-be-tested battery, said bottom surface being attached to the carrying surface of the carrying platform.
2 . The detection apparatus according to claim 1 , wherein the scanning frame comprises:
a base having a mounting groove; and
a scanning ring, at least partially located in the mounting groove, wherein the scanning ring is capable of rotating around the rotation axis;
wherein the radiation source and the detector are both connected to the scanning ring, and the radiation source and the detector are located at two opposite ends of a diameter of the scanning ring.
3 . The detection apparatus according to claim 2 , wherein the scanning frame further comprises:
a support wheel located in the mounting groove, wherein the support wheel is connected to the base, and an outer ring of the scanning ring abuts against the support wheel.
4 . The detection apparatus according to claim 1 , wherein a rotation angle α of the radiation source satisfies: α≥180°.
5 . The detection apparatus according to claim 1 , wherein the carrying platform is movably located between the radiation source and the detector, and a movement direction of the carrying platform is parallel to an extension direction of the rotation axis.
6 . The detection apparatus according to claim 1 , wherein when the scanning frame comprises a base and a scanning ring, the controlling the radiation source and the detector to rotate around the rotation axis comprises configuring the controller to:
control the scanning ring to rotate around the rotation axis.
7 . The detection apparatus according to claim 1 , wherein when the carrying platform is capable of moving along an extension direction of the rotation axis, the controller is further configured to:
control the carrying platform to move along the extension direction of the rotation axis, such that the carrying platform is located between the radiation source and the detector.
8 . The detection apparatus according to claim 1 , wherein the acquiring the detection image of the to-be-tested battery based on the radiation received by the detector comprises configuring the controller to:
acquire multiple original images based on the radiation received by the detector;
perform three-dimensional reconstruction on the multiple original images to obtain multiple cross-sectional detection images of the to-be-tested battery, wherein cross-sections of the multiple cross-sectional detection images are parallel and sequentially spaced along an extension direction of the rotation axis; and
determine the detection image of the to-be-tested battery based on the multiple cross-sectional detection images.
9 . The detection apparatus according to claim 8 , wherein the determining the detection image of the to-be-tested battery based on the multiple cross-sectional detection images comprises configuring the controller to:
perform fuzzy processing on each of the multiple cross-sectional detection images to obtain multiple first images;
perform convolution processing on each of the multiple first images to obtain multiple second images; and
perform enhancement processing on each of the multiple second images to obtain the detection image of the to-be-tested battery.
10 . The detection apparatus according to claim 8 , wherein a distance between any two adjacent cross-sectional detection images in the multiple cross-sectional detection images is greater than or equal to 0.05 millimeter and less than or equal to 0.5 millimeter.
11 . The detection apparatus according to claim 1 , wherein the determining the deformation information of the to-be-tested battery based on the detection image comprises configuring the controller to:
determine a deformation amount of the to-be-tested battery based on the detection image; and
determine the deformation information of the to-be-tested battery based on the deformation amount.
12 . The detection apparatus according to claim 11 , wherein the determining the deformation amount of the to-be-tested battery based on the detection image comprises configuring the controller to:
identify a bottom surface of the to-be-tested battery in the detection image;
determine a distance between the bottom surface and a battery cell in the to-be-tested battery; and
determine the deformation amount of the to-be-tested battery based on the distance.
13 . The detection apparatus according to claim 11 , wherein the controller is further configured to:
determine, in response to the deformation amount being greater than a preset value, that the to-be-tested battery is unqualified.
14 . The detection apparatus according to claim 13 , wherein the preset value is greater than or equal to 1 millimeter and less than or equal to 3 millimeters.
15 . A battery production device, comprising the detection apparatus according to claim 1 .
16 . A detection apparatus for detecting battery deformation, comprising:
a scanning frame;
a radiation source connected to the scanning frame;
a detector connected to the scanning frame, wherein the detector is opposite an emission port of the radiation source; and
a carrying platform located between the radiation source and the detector, wherein the carrying platform is configured to hold a to-be-tested battery on a carrying surface;
wherein the radiation source and the detector are arranged for rotating around a same rotation axis, a rotation direction of the radiation source is the same as a rotation direction of the detector, such that during rotation, the detector remains opposite the emission port of the radiation source, and the carrying platform is located between the radiation source and the detector;
wherein the carrying surface of the carrying platform is configured to hold a bottom surface of the to-be-tested battery, and
wherein the carrying platform is arranged such that the rotation axis is located on the carrying surface of the carrying platform during rotation of the radiation source and the detector around the rotation axis.