BATTERY INSPECTION DEVICE AND BATTERY INSPECTION METHOD

A problem to be addressed by the present invention is to provide a battery inspection device and a battery inspection method that make it possible to inspect the positional shift of the electrode accurately in a short time. The problem is solved by using the inspection method, which is used to inspect the position of a plurality of plate-like electrodes housed generally in parallel in the battery, and by providing the device making such an inspection possible. The inspection method includes the steps of: 1) using an X-ray source disposed so as to be able to radiate X-rays in a direction in which said plate-like electrode extends, a light-receiver configured to receive said X-rays from said X-ray source, and means capable of displacing the relative positions of said X-ray source and the electrode in a direction vertical to the direction in which said plate-like electrode extends, to displace the relative positions of said X-ray source and said electrode in said direction vertical to said direction in which said plate-like electrode extends, and at the same time, substantially continuously take images of all of the plurality of electrodes housed in said battery; 2) selecting the image having the smallest projection width from among said images substantially continuously taken of each of said electrodes; 3) computing the position of each of said electrodes in said battery on the basis of data in said image selected, and; 4) using the computation results as a base to determine whether said battery is acceptable.