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KR-20260066256-A - BATTERY CELL TEST DEVICE

KR20260066256AKR 20260066256 AKR20260066256 AKR 20260066256AKR-20260066256-A

Abstract

A battery cell test device according to one embodiment of the present invention includes a first plate assembly and a second plate assembly arranged parallel to the first plate assembly and movable in a direction orthogonal to the surface formed by the first plate assembly, and the first plate assembly and the second plate assembly may each include a plurality of plate units assembled together to form a flat plate assembly.

Inventors

  • 김효성
  • 김인정

Assignees

  • 주식회사 엘지에너지솔루션

Dates

Publication Date
20260512
Application Date
20241104

Claims (15)

  1. First plate assembly; and It includes a second plate assembly arranged parallel to the first plate assembly and movable in a direction orthogonal to the surface formed by the first plate assembly, A battery cell testing device comprising a plurality of plate units, wherein the first plate assembly and the second plate assembly are each assembled together to form a flat plate assembly.
  2. In paragraph 1, Each of the plurality of plate units comprises at least one protrusion formed protruding on a contact surface in contact with an adjacent plate unit; and A battery cell testing device comprising at least one recess formed from the contact surface to engage with the above-mentioned protrusion.
  3. In paragraph 2, A battery cell testing device in which at least one protrusion and at least one depression are alternately formed on the contact surface of each of the plurality of plate units.
  4. In paragraph 2, A battery cell testing device in which the width (W1) of the protrusion at a first point spaced apart from the contact surface of the plate unit by a predetermined distance is greater than the width (W2) of the protrusion at any second point between the first point and the contact surface.
  5. In paragraph 2, Each of the plurality of plate units comprises: a guide protrusion formed protrudingly on a protruding contact surface where the protrusion contacts the recess; and A battery cell testing device comprising a guide recess formed by a recess on a recess contact surface in which the recess contacts the protrusion so as to engage with the guide protrusion.
  6. In paragraph 5, A battery cell testing device in which the guide protrusion is formed to extend along the perimeter of the protruding contact surface of the protrusion.
  7. In paragraph 1, A battery cell testing device further comprising reinforcing members each coupled to adjacent plate units among the plurality of plate units.
  8. In Paragraph 7, A battery cell testing device wherein each of the first plate assembly and the second plate assembly further comprises a reinforcing groove in which the reinforcing member is received.
  9. In paragraph 8, The reinforcing groove is formed to extend in a direction toward an adjacent plate unit from any one of the plurality of plate units, and A battery cell testing device in which, when any one of the above plate units and an adjacent plate unit are assembled, the reinforcing grooves formed in each plate unit are connected to each other.
  10. In paragraph 8, A battery cell testing device in which the reinforcing groove is formed on the back surface of the first plate assembly and the second plate assembly facing each other.
  11. In Paragraph 7, A battery cell testing device in which the reinforcing member is detachably coupled to the plate unit.
  12. In paragraph 1, A battery cell testing device having at least one guide hole formed in a plate unit disposed at the edge of the first plate assembly and the second plate assembly among a plurality of plate units.
  13. In Paragraph 12, A battery cell testing device in which the guide holes are formed to be spaced apart along the edges of the first plate assembly and the second plate assembly when the plurality of plate units are assembled.
  14. In Paragraph 13, A battery cell testing device further comprising a plurality of guide axes that penetrate a plurality of guide holes formed in the first plate assembly and the second plate assembly and guide the movement of the second plate assembly.
  15. In Paragraph 14, A stopper member coupled to the plurality of guide axes above to restrict the movement of the first plate assembly; and A battery cell testing device further comprising a pressing member coupled to the plurality of guide axes above to press the second plate assembly toward the first plate assembly.

Description

Battery Cell Test Device The present invention relates to a battery cell testing device, and more specifically, to a battery cell testing device capable of testing battery cells of various sizes. In modern society, as the use of portable devices such as mobile phones, laptops, camcorders, and digital cameras, as well as energy storage systems (ESS), has become commonplace, the development of technologies in related fields is becoming active. Furthermore, rechargeable secondary batteries are being utilized as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to address air pollution caused by conventional gasoline vehicles using fossil fuels; consequently, the need for the development of secondary batteries is increasing. Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are receiving the most attention due to their advantages of free charging and discharging, low self-discharge rate, and high energy density. These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and a battery case that seals and houses the electrode assembly together with an electrolyte. Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet. Recently, secondary batteries are being widely used not only in small devices such as portable electronic equipment but also in medium-to-large devices such as automobiles and power storage systems. For applications in medium-to-large devices, a large number of secondary batteries can be electrically connected to increase capacity and output. In this context, pouch-type secondary batteries are becoming increasingly popular due to their advantages, such as ease of stacking and light weight. Pouch-type secondary batteries can generally be manufactured through a process in which an electrolyte is injected while an electrode assembly is housed in a pouch outer casing, and the pouch outer casing is sealed. Secondary batteries can generate internal gas due to degradation caused by repeated charging and discharging cycles. When such internal gas is generated, the increased internal pressure can lead to swelling, where at least a portion of the casing bulges. In particular, pouch-type secondary batteries are more susceptible to severe swelling compared to can-type batteries because their casings have weaker structural rigidity. As such, when swelling occurs in secondary batteries, the internal pressure increases and the volume expands, which can have an adverse effect on the structural stability of the battery module. Furthermore, battery modules often contain a large number of secondary batteries. In particular, for medium-to-large battery modules used in automobiles or energy storage systems (ESS), a very large number of secondary batteries may be included and interconnected to achieve high output or high capacity. In this case, even if the volume of each secondary battery increases only slightly due to swelling, the volume changes of each secondary battery are aggregated to form the total deformation of the battery module, which can reach a severe level. Therefore, the volume expansion caused by the swelling of each secondary battery can generally degrade the structural stability of the battery module. Figure 1 is a schematic diagram of a conventional battery cell test apparatus. Referring to FIG. 1, a conventional battery cell test device (10) includes a lower plate (11) that supports a battery cell (20) and an upper plate (12) that presses the battery cell (20) from above. Such a conventional battery cell test device (10) can only test battery cells (20) of a size corresponding to the size of the lower plate (11) and the upper plate (12). However, since the battery cell (20) can have various sizes, a lower plate (11) and an upper plate (12) are required according to the size of the battery cell (20). Accordingly, the conventional battery cell test device (10) has a problem of reduced test efficiency, such as preparing and replacing the lower plate (11) and the upper plate (12) according to the size of the battery cell (20). FIG. 1 is a schematic perspective view of a conventional battery cell test apparatus. FIG. 2 is a perspective view showing a battery cell test device according to one embodiment of the present invention. FIG. 3 is a plan view of the first