Storage module
A storage module in which a plurality of storage elements are electrically connected by bus bars includes: a temperature sensor which contacts a surface of the storage element and detects a temperature of the storage element; a pressing member which presses the temperature sensor to the storage element; and a regulation member which regulates a movement of the temperature sensor in a direction orthogonal to a pressing direction of the pressing member.
1. A storage module in which a plurality of storage elements are electrically connected by bus bars, the storage module comprising:
a temperature sensor which contacts a surface of the storage element and detects a temperature of the storage element;
a pressing member which presses the temperature sensor to the storage elements;
a regulation member which regulates a movement of the temperature sensor in a direction orthogonal to a pressing direction of the pressing member; and
a bus bar cover which has an insulating plate disposed between the bus bars adjacent to each other,
wherein the pressing member is separated from the temperature sensor,
a pressing force transmission portion which is connected to or separated from the temperature sensor and transmits pressing force to the temperature sensor is provided in the pressing member,
the pressing member has an accommodation portion which accommodates the temperature sensor and a pair of elastic force generation portions of which base ends are connected to the accommodation portion,
a leading edge of the elastic force generation portion engages with a receiving portion of the bus bar cover, and
the regulation member regulates the movement of the temperature sensor via the accommodation portion.
2. The storage module according to claim 1 , wherein
the temperature sensor has an approximately rectangular parallelepiped shape and a lead wire extends from a surface opposite to a contact surface contacting the surface of the storage element, and
the pressing force transmission portion contacts four corners of the surface opposite to the contact surface of the temperature sensor to avoid the lead wire.
3. The storage module according to claim 2 , wherein
the storage element includes a container which has a terminal attachment surface on which an electrode terminal is disposed, and
the temperature sensor contacts the terminal attachment surface.
4. The storage module according to claim 3 , wherein
an electrode terminal of a positive electrode and an electrode terminal of a negative electrode are disposed on the terminal attachment surface,
a gas discharge valve which cleaves under a predetermined pressure and discharges gas in the container is provided between the positive electrode terminal and the negative electrode terminal, and
the temperature sensor contacts at least one of a portion between an end of the terminal attachment surface of the positive electrode terminal side and the positive electrode terminal and a portion between an end of the terminal attachment s face of the negative electrode terminal side and the negative electrode terminal.
5. The storage module according to claim 2 , wherein
the temperature sensor has a heat sensitive element and a sealing portion sealing the heat sensitive element, and
the pressing member is made of a material having an elastic modulus lower than an elastic modulus of the sealing portion.
6. The storage module according to claim 2 , wherein
the temperature sensor has a heat sensitive element and a sealing portion sealing the heat sensitive element, and
the sealing portion is made of a material having thermal conductivity higher than thermal conductivity of the pressing member.
7. The storage module according to claim 1 , wherein
the storage element includes a container which has a terminal attachment surface on which an electrode terminal is disposed, and
the temperature sensor contacts the terminal attachment surface.
8. The storage module according to claim 7 , wherein
an electrode terminal of a positive electrode and an electrode terminal of a negative electrode are disposed on the terminal attachment surface,
a gas discharge valve which cleaves under a predetermined pressure and discharges gas in the container is provided between the positive electrode terminal and the negative electrode terminal, and
the temperature sensor contacts at least one of a portion between an end of the terminal attachment surface of the positive electrode terminal side and the positive electrode terminal and a portion between an end of the terminal attachment surface of the negative electrode terminal side and the negative electrode terminal.
9. The storage module according to claim 1 , wherein
the temperature sensor has a heat sensitive element and a sealing portion sealing the heat sensitive element, and
the pressing member is made of a material having an elastic modulus lower than an elastic modulus of the sealing portion.
10. The storage module according to claim 1 , wherein
the temperature sensor has a heat sensitive element and a sealing portion sealing the heat sensitive element, and
the sealing portion is made of a material having thermal conductivity higher than thermal conductivity of the pressing member.