Sensor unit and energy storage module
A sensor unit disclosed herein is a temperature sensor unit to be attached to an energy storage device. The temperature sensor unit includes an FPC to be positioned on an energy storage device body, a temperature sensor connected to a detection line of the FPC, a housing disposed on the FPC and covering the temperature sensor, and a biasing member elastically and deformably held in the housing and configured to bias the lower housing of the housing toward the energy storage device body by elastic restoring force to bring the temperature sensor into contact with the energy storage device body with the FPC therebetween.
1. A sensor unit to be attached to a detection object, the sensor unit comprising:
a conductive path member to be positioned on a detection object, the conductive path member including a conductive path and having flexibility and a band-like shape;
a sensor element disposed on a surface of the conductive path member and connected to the conductive path;
a mount disposed on the conductive path member and covering the sensor element; and
a biasing member elastically deformably held in the mount and configured to bias the mount toward the detection object by elastic restoring force to bring a rear surface of the conductive path member into contact with the detection object.
2. The sensor unit according to claim 1 , wherein
the mount has a locking portion engageable with a retainer of the detection object, and
the biasing member is elastically deformed by engagement between the locking portion and the retainer in a direction in which the locking portion and the retainer are engaged.
3. The sensor unit according to claim 2 , wherein
the sensor element is a temperature sensor for detecting temperature of the detection object, and
the sensor unit further includes a plate on the rear surface of the conductive path member at a position corresponding to the sensor element.
4. The sensor unit according to claim 3 , wherein the plate is a metal plate having heat conductivity.
5. The sensor unit according to claim 1 , further comprising a resin protector covering the sensor element in a space between the mount and the sensor element.
6. The sensor unit according to claim 1 , wherein
the biasing member is a helical metal coil spring, and
the biasing member biases around an outer edge of the sensor element.
7. The sensor unit according to claim 1 , wherein
the mount is formed of a synthetic resin, and
the biasing member is formed of a synthetic resin and integrally formed with the mount.
8. An energy storage module comprising:
a detection object; and
the sensor unit according to claim 1 , wherein
the detection object is an energy storage device.
9. A sensor unit to be attached to a detection object, the sensor unit comprising:
a conductive path member to be positioned on a detection object, the conductive path member including a conductive path and having flexibility and a band-like shape;
a sensor element disposed on a surface of the conductive path member and connected to the conductive path;
a mount disposed on the conductive path member and covering the sensor element; and
a biasing member elastically deformably held in the mount and configured to bias the mount toward the detection object by elastic restoring force to bring a rear surface of the conductive path member into contact with the detection object,
wherein
the biasing member is a helical metal coil spring,
the biasing member biases around an outer edge of the sensor element,
the mount includes a spring housing that houses a portion of the biasing member in an axial orientation and a cover attached to the spring housing in an axial direction of the biasing member, and
the biasing member is sandwiched between the spring housing and the cover in the axial direction.
10. The sensor unit according to claim 9 , further comprising:
an adhesive, wherein
the mount further includes a sensor housing that houses the sensor element, and the sensor housing is attached to the conductive path member with the adhesive.
11. A sensor unit to be attached to a detection object, the sensor unit comprising:
a conductive path member to be positioned on a detection object, the conductive path member including a conductive path and having flexibility and a band-like shape;
a sensor element disposed on a surface of the conductive path member and connected to the conductive path;
a mount disposed on the conductive path member and covering the sensor element; and
a biasing member elastically deformably held in the mount and configured to bias the mount toward the detection object by elastic restoring force to bring a rear surface of the conductive path member into contact with the detection object,
wherein
the biasing member includes two metal leaf springs, and the two metal leaf springs are retained by two spring retainers located on two opposite sides of the sensor element in the mount.
12. The sensor unit according to claim 11 , wherein the leaf springs are positioned in such a manner that portions of the leaf springs that bias the mount are point-symmetric about the sensor element.