CN-122025936-A - Battery shell and battery core

Abstract

One embodiment of the present disclosure relates to a battery case and a battery cell, the battery case according to one embodiment including a case body having an opening portion in which an electrode assembly is received, a cap plate inserted into the opening portion, and a protrusion portion into which the cap plate is inserted and which protrudes in an outer direction than other regions of the case body.

Inventors

• JIN XUANXI
• Lu Meishao
• LI DONGHUI

Assignees

• SK新能源株式会社

Dates

Publication Date

20260512

Application Date

20251023

Priority Date

20241111

Claims (12)

1. 1. A battery case, comprising: a case body having an opening portion in which the electrode assembly is accommodated; a cover plate inserted into the opening, and And a protruding portion into which the cover plate is inserted, and which protrudes in an outer direction than other regions of the housing main body.
2. 2. The battery case according to claim 1, wherein, The width (W2) of the cover plate is larger than the width (W1) of the opening.
3. 3. The battery case according to claim 1, wherein, The protruding portion protrudes a difference (W2-W1) between a width (W2) of the cover plate and a width (W1) of the opening.
4. 4. The battery case according to claim 1, wherein, The thickness of the other region of the case body is the same as the thickness of the case body at the protruding portion.
5. 5. The battery case according to claim 1, wherein, The cover plate includes an insertion region having a width smaller than a width of the opening.
6. 6. The battery case according to claim 1, wherein, The protruding portion is formed in a longitudinal direction and/or a width direction of the housing main body.
7. 7. The battery case according to claim 1, wherein, The housing body is prismatic or cylindrical.
8. 8. The battery case according to claim 1, wherein, The housing body is cylindrical, and an outer diameter of the cover plate is larger than an inner diameter of the opening portion.
9. 9. A battery cell, comprising: a case body having an opening portion in which the electrode assembly is accommodated; An electrode assembly accommodated in the case body; a cover plate inserted into the opening, and And a protruding portion into which the cover plate is inserted, and which protrudes in an outer direction than other regions of the housing main body.
10. 10. The cell of claim 9, wherein, The width (W2) of the cover plate is larger than the width (W1) of the opening.
11. 11. The cell of claim 9, wherein, The thickness of the other region of the case body is the same as the thickness of the case body at the protruding portion.
12. 12. The cell of claim 9, wherein, The shell body and the cover plate are sealed in a welding mode.

Description

Battery shell and battery core Technical Field The present disclosure relates to a battery case and a battery cell, and more particularly, to a battery case and a battery cell having excellent stability. Background A secondary battery is a battery that converts electric energy into chemical energy and stores it so that it can be reused by being charged and discharged a plurality of times. Secondary batteries are widely used in various industries due to their economical and environmental characteristics. In particular, the lithium secondary battery (Lithium Secondary Battery) among the secondary batteries is widely used in various industries including portable devices requiring high-density energy. The working principle of the lithium secondary battery is electrochemical redox reaction. Namely, it is a principle that electricity is generated by movement of lithium ions (Lithium Ion) and charged by the reverse process. In a lithium secondary battery, a phenomenon in which lithium ions escape from a negative electrode (Anode) and move to a positive electrode (Cathode) through an electrolyte and a separator is called discharge. In addition, a process opposite to this phenomenon is called charging. The secondary battery is fabricated by assembling a plurality of components, and in particular, an electrode assembly and an electrolyte are contained in a case. Since the sealability of the case is an important factor capable of determining the performance of the secondary battery, many studies have been conducted in order to improve the sealability. Disclosure of Invention First, the technical problem to be solved An embodiment of the present disclosure provides a battery case and a battery cell having excellent stability. An embodiment of the present disclosure provides a battery case and a battery cell having excellent sealability. One embodiment of the present disclosure provides a battery case and a battery cell in which leakage of an electrolyte does not occur. On the other hand, the battery case and the battery cell according to the present disclosure may be widely applied to the Green Technology (Green Technology) fields of electric vehicles (ELECTRIC VEHICLE), battery charging stations (Battery Charging Station), energy storage systems (Energy Storage System, ESS), and other solar Power generation (Photovoltaics) and Wind Power generation (windpower) using batteries. In addition, the battery assembly according to the present disclosure may be used to prevent climate change by suppressing atmospheric pollution and greenhouse gas emission, environmental protection (eco-friendly) vehicles (Mobility) including electric vehicles and Hybrid (Hybrid) vehicles, and the like. (II) technical scheme An embodiment of the present disclosure provides a battery case including a case body having an opening portion in which an electrode assembly is received, a cap plate inserted into the opening portion, and a protrusion portion inserted into the protrusion portion and protruding in an outer direction than other regions of the case body. In one embodiment, the width W2 of the cover plate may be greater than the width W1 of the opening portion. In one embodiment, the protruding portion may protrude a difference (W2-W1) between a width W2 of the cover plate and a width W1 of the opening portion. In one embodiment, the thickness of the other region of the housing body and the thickness of the housing body at the protruding portion may be the same. In one embodiment, the cover plate may include an insertion region having a width smaller than that of the opening portion. In one embodiment, the protruding portion may be formed in a length direction and/or a width direction of the housing main body. In one embodiment, the housing body may be prismatic or cylindrical. In one embodiment, the case body may be cylindrical, and an outer diameter of the cover plate may be larger than an inner diameter of the opening portion. An embodiment of the present disclosure provides a battery cell that may include a case body having an opening portion in which an electrode assembly is received, the electrode assembly being received in the case body, a cap plate inserted into the opening portion, and a protrusion portion inserted into the cap plate and protruding in an outer direction than other regions of the case body. In one embodiment, the width W2 of the cover plate may be greater than the width W1 of the opening portion. In one embodiment, the thickness of the other region of the housing body and the thickness of the housing body at the protruding portion may be the same. In one embodiment, the housing body and the cover plate may be sealed by welding. (III) beneficial effects An embodiment of the present disclosure may provide a battery case and a battery cell having excellent stability. In one embodiment of the present disclosure, a battery case and a battery cell having excellent sealability can be provided. In one embodiment of the presen