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CN-122000512-A - Power storage device

CN122000512ACN 122000512 ACN122000512 ACN 122000512ACN-122000512-A

Abstract

The present disclosure provides an electrical storage device. The temperature detection unit includes a first temperature detection unit disposed on a first direction side of the module center and a second temperature detection unit disposed on a second direction side of the module center. The first detection connector is electrically connected to the first temperature detection unit and is disposed on the first direction side with respect to the module body. The second detection connector is electrically connected to the second temperature detection unit and is disposed on the second direction side with respect to the module body.

Inventors

  • Keisuke Sakashita

Assignees

  • 丰田自动车株式会社

Dates

Publication Date
20260508
Application Date
20251104
Priority Date
20241105

Claims (5)

  1. 1. A power storage device is provided with: a battery module including a plurality of electric storage units arranged in an arrangement direction; a bus bar module electrically connected with the battery module; temperature detecting unit, and At least one detection module electrically connected to the temperature detection unit and disposed at one end side in the arrangement direction in the battery module, In the case where the direction intersecting with the arrangement direction is set as the intersecting direction, One of the intersecting directions is set as a first direction, When the other direction of the intersecting direction is set as the second direction, The bus bar module includes: a plurality of first bus bars arranged on the first direction side of a module center located at the center in the cross direction in the battery module, A plurality of second bus bars arranged on the second direction side of the module center, The temperature detection unit includes: A first temperature detection unit disposed on the first direction side of the module center and capable of detecting a temperature of at least one of the plurality of first bus bars, and A second temperature detection unit which is disposed on the second direction side of the module center and can detect the temperature of at least one of the plurality of second bus bars, The detection module comprises a module main body, a first detection connector and a second detection connector which are connected with the module main body, The first detection connector is electrically connected to the first temperature detection unit and is disposed on the first direction side with respect to the module main body, The second detection connector is electrically connected to the second temperature detection unit and is disposed on the second direction side with respect to the module main body.
  2. 2. The power storage device according to claim 1, wherein, The module main body is disposed at a position overlapping the battery modules in the arrangement direction.
  3. 3. The power storage device according to claim 1 or 2, wherein, The at least one detection module comprises: a first detection module arranged on one side of the arrangement direction relative to the battery modules, and A second detection module disposed on the other side of the arrangement direction with respect to the battery modules, The first detection connector of the first detection module is electrically connected to the first temperature detection portion disposed on the one side than a predetermined position in the arrangement direction, The second detection connector of the first detection module is electrically connected to the second temperature detection section arranged on the side of the predetermined position in the arrangement direction, The first detection connector of the second detection module is electrically connected to the first temperature detection portion disposed on the other side than the predetermined position in the arrangement direction, The second detection connector of the second detection module is electrically connected to the second temperature detection section disposed on the other side than the predetermined position in the arrangement direction.
  4. 4. The power storage device according to claim 1 or 2, wherein, The bus bar module includes: A first bus bar connector connected to the first detection connector; A first printed substrate formed with a first wiring electrically connecting the first bus bar and the first bus bar connector; A second bus bar connector connected with the second detection connector, and A second printed board having a second wiring for electrically connecting the second bus bar and the second bus bar connector, The battery module includes: A first side surface of the first direction side in the crossing direction, and A second side surface on the second direction side in the intersecting direction, The first printed board is disposed at a position opposite to the first side surface, The second printed board is disposed at a position facing the second side surface.
  5. 5. The power storage device according to claim 1 or 2, wherein, The first test connector includes a first test pin for temperature detection, The second test connector includes a second test pin for temperature detection, The number of the first detection pins and the number of the second detection pins are equal to or greater than the sum of the number of the first bus bars whose temperature is detected by the first temperature detection unit and the number of the second bus bars whose temperature is detected by the second temperature detection unit.

Description

Power storage device Technical Field The present disclosure relates to an electric storage device. Background Japanese patent application laid-open No. 2024-085194 discloses a secondary battery in which a plurality of battery cells are arranged. The secondary battery includes a bus bar connecting positive electrodes at one end of each battery cell and negative electrodes at the other end of each battery cell to each other. The bus bar is provided with a temperature detection unit as a sensor for detecting the temperature of the bus bar. Signals from the temperature detecting portions provided to the respective bus bars are transmitted through the flexible board to the connector provided outside the flexible board. Disclosure of Invention In the secondary battery (power storage device) described in japanese patent application laid-open No. 2024-085194, as described above, signals are transmitted to the connector from temperature detecting portions provided on bus bars at both ends of a battery cell (power storage unit). For example, when (pins of) the connector are arranged to face the one end side, it is considered that it is difficult to electrically connect the temperature detecting portion on the other end side to the connector. Specifically, in order to electrically connect the temperature detecting section on the other end side and the connector via the flexible substrate, it is necessary to detour the flexible substrate to the one end side. Therefore, the secondary battery is considered to be large-sized. The present disclosure has been made to solve the above-described problems, and an object of the present disclosure is to provide an electric storage device in which, when temperature detection units are provided on both sides in a cross direction intersecting an arrangement direction of electric storage units, detection modules disposed on one end side in the arrangement direction of unit modules can be easily electrically connected to the temperature detection units on both sides. The power storage device according to one aspect of the present invention includes a battery module including a plurality of power storage cells arranged in an arrangement direction, a bus bar module electrically connected to the battery module, a temperature detection unit, and at least one detection module electrically connected to the temperature detection unit and disposed on one end side in the arrangement direction in the battery module. When the direction intersecting the arrangement direction is the intersecting direction, and one direction of the intersecting direction is the first direction, and the other direction of the intersecting direction is the second direction, the bus bar module includes a plurality of first bus bars arranged on the first direction side of the module center located at the center of the intersecting direction in the battery module, and a plurality of second bus bars arranged on the second direction side of the module center. The temperature detection unit includes a first temperature detection unit that is disposed on a first direction side of a module center and is capable of detecting a temperature of at least one of the plurality of first bus bars, and a second temperature detection unit that is disposed on a second direction side of the module center and is capable of detecting a temperature of at least one of the plurality of second bus bars. The detection module comprises a module body and a first detection connector and a second detection connector which are connected with the module body. The first detection connector is electrically connected to the first temperature detection unit and is disposed on the first direction side with respect to the module body. The second detection connector is electrically connected to the second temperature detection unit and is disposed on the second direction side with respect to the module body. The above and other objects, features, aspects and advantages of the present invention will become apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. Drawings Fig. 1 is a perspective view showing the structure of the power storage device according to the present embodiment. Fig. 2 is a plan view showing a detailed structure of the power storage device. Fig. 3 is a partial enlarged view illustrating the battery module and the detection module of fig. 2. Fig. 4 is a partial enlarged view showing a structure in the vicinity of the detection module of fig. 2. Fig. 5 is a diagram showing the pin arrangement of the detection connector on the X1 side. Fig. 6 is a diagram showing the pin arrangement of the detection connector on the X2 side. Detailed Description Embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings referred to below, the same or corresponding components are denoted by the same reference numerals. Fig. 1