Battery pack and electric device

1. A battery pack comprising:

a plurality of battery blocks each including a plurality of batteries fixed by a holder and a peripheral surface on one end or both ends of which a first connector is provided;

a connecting unit which connects the plurality of battery blocks to each other such that two first connectors are opposed to each other; wherein the connecting unit is provided between end faces of connected battery blocks, and

a second connector which fits in the two first connectors opposed to each other,

wherein at least one battery block of the plurality of battery blocks is rotated around a connection direction of the plurality of battery blocks and fixed to the connecting unit,

wherein the at least one battery block of the plurality of battery blocks includes a plurality of first clicks provided on a circumference of the end faces, the connecting unit includes a plurality of second clicks provided on a circumference, and the plurality of first clicks and the plurality of second clicks are rotational so that each of the plurality of second clicks rotationally fit in an inner side of each of the plurality of first clicks,

wherein the first connectors includes a first socket, a second socket and a third socket,

and an electrode terminal is provided in each of the first and second sockets,

wherein a signal terminal is provided in the third socket between the first and second sockets,

wherein a fitting direction of the second connector is a direction perpendicular or substantially perpendicular to the connecting direction of the plurality of battery blocks, and

wherein the second connector is configured to fix two battery blocks and electrically connect the two battery blocks to each other, and

wherein the second connector is provided with a base body and two connector elements provided on the base body, and the two connector elements fit in the two first connectors opposed to each other, respectively,

wherein one of the two connector elements includes a positive electrode terminal plug and a negative electrode terminal plug for electrically connecting two battery blocks to each other in series or in parallel and the signal terminal provided between the positive electrode terminal plug and the negative electrode terminal plug,

wherein the positive electrode terminal plug includes a plate spring-shaped terminal which grips the electrode terminal provided in the first socket,

wherein the negative electrode terminal plug includes a plate spring-shaped terminal which grips the electrode terminal provided in the second socket and

wherein the signal terminal fits in the third socket such that the signal terminal includes a plurality of terminals which are brought into contact with terminals of the third socket,

wherein the at least one battery block of the plurality of battery blocks and the connecting unit are further provided with a positioning unit for positioning the at least one battery block battery block with respect to the connecting unit, and

wherein the positioning unit is a ring-shaped or partially ring-shaped projection provided at the center of the at least one battery block battery block end face and the center of the connecting unit, and wherein the diameter of the projection of the connecting unit has a slightly smaller or larger diameter than a diameter of the projection of the at least one battery block battery block such that the projection of the at least one battery block battery block and the projection of the connecting unit fit in each other.

2. The battery pack according to claim 1 , wherein the at least one battery block of the plurality of battery blocks is provided with a battery block main body, a wiring substrate provided on the battery block main body, and a cover provided on the battery block main body so as to cover the wiring substrate, and the cover is provided with a wall portion pressed against the wiring substrate to enclose a predetermined area of the wiring substrate and a sealing member provided on a tip end of the wall portion.

3. The battery pack according to claim 1 , wherein the at least one battery block of the plurality of battery blocks is provided with a battery block main body, a tray provided on the battery block main body, and a wiring substrate provided on the tray, and the tray is provided with a peripheral wall portion pressed against the wiring substrate.

4. An electric device comprising: the battery pack according to claim 1 .

5. The electric device according to claim 4 , wherein the electric device is provided with a power generating unit which generates electric power from given power and supplies the electric power to the battery pack.