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EP-4369486-B1 - BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME

EP4369486B1EP 4369486 B1EP4369486 B1EP 4369486B1EP-4369486-B1

Inventors

  • CHOI, JONG CHUL

Dates

Publication Date
20260506
Application Date
20221107

Claims (13)

  1. A battery module (100) comprising: a bottom plate (120), a cell frame (130) located on the bottom plate, a plurality of battery cells (110) mounted to the cell frame, and an adhesive layer (140) located between the bottom plate and the plurality of battery cells, wherein the cell frame has light transmittance, wherein the cell frame is formed of a resin that generates total internal reflection into the cell frame, wherein said resin has a higher refractive index than a medium outside the cell frame, characterized in that a diffuse reflection member (190) is formed on a part of the surface of the cell frame.
  2. The battery module according to claim 1, wherein: the adhesive layer is formed of a photocurable resin.
  3. The battery module according to claim 1, wherein: the cell frame is formed with a plurality of holes for mounting the battery cells.
  4. The battery module according to claim 3, wherein: the adhesive layer is formed in the plurality of holes and contacts at least one of the bottom plate and the bottom portion of the battery cell.
  5. The battery module according to claim 1, wherein: the resin has a transmittance of 90% or more.
  6. The battery module according to claim 1, wherein: the diffuse reflection member is formed on a boundary surface between the cell frame and the adhesive layer.
  7. The battery module according to claim 6, wherein: a light that entered the cell frame passes through the diffuse reflection member and is emitted to the adhesive layer, so that the adhesive layer is photo-cured.
  8. The battery module according to claim 1, wherein: the adhesive layer includes a photocuring initiator.
  9. The battery module according to claim 1, wherein: the bottom plate is a cooling plate.
  10. The battery module according to claim 1, wherein: the battery cell is cylindrical.
  11. The battery module according to claim 1, wherein: the bottom plate and the cell frame are integrally formed.
  12. The battery module according to claim 1, wherein: a plurality of light paths are formed inside the cell frame.
  13. A battery pack comprising the battery module as set forth in claim 1.

Description

The present disclosure relates to a battery module and a battery pack including the same, and more particularly, to a battery module whose process time is reduced, and a battery pack including the same. [BACKGROUND] With the technology development and increased demand for mobile devices, demand for secondary batteries as energy sources has been rapidly increasing. A variety of researches on secondary batteries capable of meeting various needs have been carried out accordingly. A secondary battery has attracted considerable attention as an energy source for power-driven devices, such as an electric bicycle, an electric vehicle, and a hybrid electric vehicle, as well as an energy source for mobile devices, such as a mobile phone, a digital camera and a laptop computer. Lithium secondary batteries, which are frequently used among secondary batteries, classified based on the shape of the exterior material into a can-type secondary battery in which the electrode assembly is built into a metal can, and a pouch-type secondary battery in which the electrode assembly is built into a pouch of an aluminum laminate sheet Among them, the can-type secondary battery can manufacture a metal can for accommodating an electrode assembly in a cylindrical shape. Such a can-type secondary battery is provided with a housing that accommodates multiple secondary batteries, thereby realizing a battery module. However, when the multiple secondary batteries are accommodated in the housing inner space of the battery module without fixing means, the secondary battery is easily movable in the accommodation space inside the housing in an environment where the vehicle equipped with the battery module is subject to frequent vibrations and shocks caused by dropping, which causes problems such as damage to the secondary battery or breakage of the connection between the electrode terminal and the busbar. US2020185797A1 discloses a battery module. US2019386356A1 discloses a thermal management power battery assembly and battery pack. [DETAILED DESCRIPTION OF THE INVENTION] [Technical Problem] It is an object of the present disclosure to provide a battery module whose process time is reduced, and a battery pack including the same. However, the technical problem to be solved by embodiments of the present disclosure is not limited to the above-described problems, and can be variously expanded within the scope of the technical idea included in the present disclosure. [Technical Solution] According to the invention, there is provided a battery module comprising: a bottom plate, a cell frame located on the bottom plate, a plurality of battery cells mounted to the cell frame, and an adhesive layer located between the bottom plate and the plurality of battery cells, wherein the cell frame has light transmittance. The adhesive layer may be formed of a photocurable resin. The cell frame may be formed with a plurality of holes for mounting the battery cells. The adhesive layer may be formed in the plurality of holes and contacts at least one of the bottom plate and the bottom portion of the battery cell. The cell frame is formed of a resin that generates total internal reflection into the cell frame. The resin may have a transmittance of 90% or more. The battery module further comprises a diffuse reflection member formed on a part of the surface of the cell frame. The diffuse reflection member may be formed on a boundary surface between the cell frame and the adhesive layer. A light that entered the cell frame passes through the diffuse reflection member and is emitted to the adhesive layer, so that the adhesive layer can be photo-cured. The adhesive layer may include a photocuring initiator. The bottom plate may be a cooling plate. The battery cell may be cylindrical. The bottom plate and the cell frame may be integrally formed. A plurality of light paths may be formed inside the cell frame. According to another aspect of the present disclosure, there is provided a battery pack comprising the above-mentioned battery module. [Advantageous Effects] According to embodiments, a light-transmitting cell frame having a total reflection function and a photocurable resin are used as an adhesive, thereby capable of reducing a process time. The effects of the present disclosure are not limited to the effects mentioned above and additional other effects not described above will be clearly understood from the description of the appended claims by those skilled in the art. [BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a diagram showing a battery module according to a comparative example;Fig. 2 is a diagram showing a method of forming a battery module according to the comparative example of Fig. 1;Fig. 3 is a diagram showing a battery module according to one embodiment of the present disclosure;Fig. 4 is a plan view of the cell frame shown in Fig. 3;Fig. 5 is a diagram showing a method of forming a battery module according to the embodiment of Fig. 3;Fig. 6 is a diagram