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CN-122029672-A - Battery module

CN122029672ACN 122029672 ACN122029672 ACN 122029672ACN-122029672-A

Abstract

Provided is a battery module which can be easily manufactured and which can further reduce the contact of an ejection object ejected from an abnormal battery that has generated an abnormality with a normal battery adjacent to the abnormal battery. A Battery Module (BM) includes a plurality of Batteries (BT) arranged in a first direction, the batteries having explosion-proof valves (EV) on an upper surface thereof, a first heat shield (HI 1) arranged above the plurality of Batteries (BT), and a second heat shield (HI 2) arranged between the plurality of batteries, the first heat shield (HI 1) having a plurality of Openings (OP) each arranged in a first direction at a position facing the explosion-proof valves (EV), and Slits (SL) arranged between the Openings (OP), the second heat shield (HI 2) having a main Body (BP) facing the Batteries (BT), and a protrusion (PP) protruding from the main Body (BP) toward the first heat shield (HI 1), the protrusion (PP) being inserted into the Slits (SL) and the protrusion (PP) covering the Openings (OP).

Inventors

  • Sekine Dachiya

Assignees

  • 株式会社村田制作所

Dates

Publication Date
20260512
Application Date
20250307
Priority Date
20240529

Claims (7)

  1. 1. A battery module is provided with: A plurality of batteries arranged in a first direction, the batteries having explosion-proof valves on an upper surface thereof; A first heat-insulating plate disposed above the plurality of cells, and A second heat insulating plate disposed between a plurality of the cells, The first heat shield includes: A plurality of openings respectively arranged at positions opposite to the explosion-proof valves and arranged in the first direction, and Slits arranged between the openings, The second heat shield includes: A main body part facing the battery, and A protruding portion protruding from the main body portion toward the first heat insulating plate, The protruding portion is inserted into the slit, and the protruding portion covers the opening.
  2. 2. The battery module of claim 1, wherein, The protruding portion inserted into the slit is bent toward the opening.
  3. 3. The battery module according to claim 1 or 2, wherein, The protruding dimension of the protruding portion is shorter than the dimension between the slits.
  4. 4. The battery module according to any one of claims 1 to 3, wherein, The width dimension of the protruding portion is shorter than the inter-terminal distance of the battery.
  5. 5. The battery module according to any one of claims 1 to 4, wherein, The second insulating panel comprises a fibrous material.
  6. 6. The battery module according to any one of claims 1 to 5, wherein, The width of the main body is greater than or equal to the width of the battery, and the height of the main body is greater than or equal to the height of the battery.
  7. 7. The battery module according to any one of claims 1 to 6, wherein, The size of the opening is equal to or larger than the size of the explosion-proof valve in plan view.

Description

Battery module Technical Field The present disclosure relates to battery modules. Background Patent document 1 discloses a battery module including a battery (2) and a heat shield plate (4), wherein the heat shield plate (4) is provided on a side of an electric connection unit (3) close to an upper case (12), a plurality of pressure release holes (41) are provided in the heat shield plate (4), and each pressure release hole (41) is provided in correspondence with an explosion-proof valve (21) of the battery (2) (see paragraphs [0047] and fig. 2 of patent document 1). Further, patent document 1 (refer to claim 4) discloses that a mounting hole (42) is provided in the heat shield plate (4), and a positioning pin (311) is provided in the electrical connection unit (3), and the positioning pin (311) is fixed in the mounting hole (42) by heat staking after being fitted in the mounting hole (42). Prior art literature Patent literature Patent document 1 Chinese utility model No. 218299959 specification Disclosure of Invention Technical problem to be solved by the invention In the battery module described in patent document 1, the fixing of the heat shield plate (4) uses the mounting holes (42) and the positioning pins (311), and therefore, there is a technical problem that it is difficult to align all the positioning pins (311) with the mounting holes (42). Further, since the step of fixing the positioning pin (311) to the mounting hole (42) by heat staking is performed, the number of steps increases, and the manufacturing cost is high. Further, the spouting material spouted from the battery (2) due to thermal runaway of the battery (2) may pass through the pressure release hole (41) and pass through the adjacent pressure release hole (41) to cause the gas or the spouting material to flow to the normal battery (2). As a result, the normal battery (2) may be adversely affected. The present disclosure has been completed in view of such an angle. That is, a primary object of the present disclosure is to provide a battery module that can be easily manufactured and further reduce the contact of an ejection object ejected from an abnormal battery that generates an abnormality with a normal battery adjacent to the abnormal battery. Technical scheme for solving technical problems The battery module of the present disclosure is provided with: A plurality of batteries arranged in a first direction, the batteries having explosion-proof valves on an upper surface thereof; A first heat-insulating plate disposed above the plurality of cells, and A second heat insulating plate disposed between a plurality of the cells, The first heat shield has a plurality of openings each arranged at a position facing the explosion-proof valve and aligned in the first direction, and slits provided between the openings, The second heat shield includes a main body portion facing the battery, and a protruding portion protruding from the main body portion toward the first heat shield, The protruding portion is inserted into the slit, and the protruding portion covers the opening. Effects of the invention According to the present disclosure, manufacturing can be easily performed, and it is possible to further reduce the contact of the ejection object ejected from the abnormal cell in which the abnormality occurs with the normal cell adjacent to the abnormal cell. Drawings Fig. 1 is a perspective view of a battery module according to an embodiment. Fig. 2 is an exploded perspective view of a battery module according to an embodiment. Fig. 3 is a top view of the first heat shield. Fig. 4 is a front view of a second heat shield. Fig. 5 is a front view of the battery. Fig. 6 is a schematic view (corresponding to a sectional view taken along the VI-VI line of fig. 2) showing a mounted state of the first heat shield and the second heat shield. Fig. 7 is an enlarged schematic view of the dotted line area of fig. 6. Fig. 8 is a schematic view showing a state in which the protruding portion is bent in fig. 7. Fig. 9 is a schematic diagram showing a state in which an abnormality occurs in one battery provided in the battery module. Detailed Description Hereinafter, a battery module according to an embodiment of the present disclosure will be described in more detail. Although described with reference to the drawings as necessary, various elements in the drawings are shown schematically and exemplarily for understanding the present disclosure, and the appearance, the dimensional ratio, and the like may be different from those of the actual ones. The term "planar view" as used herein refers to a state when an object (for example, a battery module) is placed on the device and viewed from directly above in the thickness (height) direction, and is synonymous with a planar view. As an example, the plane view is a state when viewed in the positive direction in the "Z direction" shown in fig. 1. Unless otherwise specified, the term "side view" as used herein refers t