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KR-20260067226-A - BATTERY

KR20260067226AKR 20260067226 AKR20260067226 AKR 20260067226AKR-20260067226-A

Abstract

The present invention provides a battery comprising: a battery housing portion housing an electrode laminate including an electrode and a separator; and a cooling portion having a recessed groove formed on a plate surface and disposed in close contact with the outer surface of the battery housing portion to form a flow path through which a refrigerant flows in the space between the recessed groove and the outer surface of the battery housing portion. By improving the heat dissipation performance of the battery cell, the invention enables the reduction of rapid charging time and the securing of high output of the battery cell, while also providing the effect of reducing cost and weight.

Inventors

  • 이건구
  • 조정원

Assignees

  • 현대자동차주식회사
  • 기아 주식회사

Dates

Publication Date
20260512
Application Date
20241105

Claims (12)

  1. A battery housing that accommodates an electrode stack including an electrode and a separator; A cooling unit having a recessed groove formed on a plate surface and positioned in close contact with the outer surface of the battery storage unit to form a flow path through which a refrigerant flows in the space between the recessed groove and the outer surface of the battery storage unit; Battery included.
  2. In paragraph 1, A battery in which the above-mentioned flow path is continuously formed along the direction of the plate surface of the cooling part by repeatedly bending the area disposed at the end of the plate surface of the cooling part, and both ends of the flow path are interconnected to form a closed loop.
  3. In paragraph 2, A battery comprising a cooling unit that is positioned in close contact with at least one side of the battery storage unit and a vaporization unit in which vaporization occurs in the flow path, and a condensation unit that is positioned in close contact with the lower surface of the battery storage unit and in which condensation occurs in the flow path by passing through external cooling water.
  4. In paragraph 3, A battery configured such that the cooling portion is formed as a single cooling plate formed in a plate shape, and the cooling plate is bent to form a vaporization portion in which a part is in close contact with one side of the battery storage portion, and another part forms a condensation portion to form an overall 'L'-shaped cross-section.
  5. In paragraph 3, A battery configured such that the cooling portion is formed by a plurality of plate-shaped cooling plates, and the cooling plates are brazed together to form a vaporization portion in which a portion is in close contact with one side of the battery storage portion, and another portion forms a condensation portion, thereby forming an overall 'L'-shaped cross-section.
  6. In paragraph 5, A battery in which two cooling units are arranged symmetrically with respect to the battery storage unit, such that the vaporization unit is in close contact with each of the two sides of the battery storage unit and the condensation unit is in close contact with the bottom surface of the battery storage unit.
  7. In paragraph 3, A battery in which the cooling portion is formed by a single cooling plate formed in a plate shape, and the cooling plate is bent at multiple locations to form the vaporization portion, in which a portion is in close contact with both sides of the battery storage portion, and the condensation portion, in which another portion is in close contact with the lower surface of the battery storage portion.
  8. In Paragraph 7, A battery in which vaporization sections are formed on both sides based on the bent area of the cooling plate, and a condensation section that is in thermal contact with the cooling water is formed between the vaporization sections and the vaporization sections.
  9. In paragraph 3, The above vaporization unit is a battery disposed on the side of the battery storage unit having a relatively large surface area.
  10. In any one of paragraphs 1 through 9, The above cooling unit is a battery that is brazed to the above battery housing.
  11. In Paragraph 10, The above cooling unit is a battery formed integrally with the above battery storage unit.
  12. In Paragraph 10, The above battery housing is a battery formed of rectangular cells.

Description

Battery The present invention relates to a battery, and more specifically, to a battery that can reduce the rapid charging time and secure high output of the battery cell, and reduce cost and weight by improving the heat dissipation performance of the battery cell. As technology development and demand for mobile devices such as mobile phones, laptops, camcorders, and digital cameras increase, technology related to rechargeable secondary batteries is becoming more active. Furthermore, as secondary batteries serve as an alternative energy source to fossil fuels that cause air pollutants and are being applied to electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs), the need for secondary battery development is steadily increasing. Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density. Meanwhile, when such a secondary battery is used in devices requiring large capacity and high voltage, such as electric vehicles, it is used in the form of a battery cell assembly or battery pack having a structure in which multiple battery cells are arranged. Since battery cell assemblies or battery packs, etc., may be affected by various operating environments of the device, for example, significant differences in charge amount and output may occur depending on temperature conditions, cooling means or heating means are provided together to maintain the temperature of the battery pack at a predetermined condition. In particular, since battery cells are densely packed in a confined space, it is very important to easily dissipate the heat generated by each cell. Since the charging or discharging process of a battery cell is carried out by electrochemical reactions, if the heat generated in the battery module during the charging or discharging process is not effectively removed, heat accumulation occurs, which consequently accelerates the degradation of the battery module and, in some cases, can even lead to ignition or explosion. Common cooling methods include water cooling and air cooling. In the case of water cooling, a passage is provided on the outside or inside of the battery pack for the refrigerant to flow, while a port for circulation protrudes outward. However, if the port is damaged due to external impact or other factors, there is a risk that refrigerant may leak into the pack, leading to a major accident. To prevent this, a cooling channel is mounted externally to the battery system to prevent the risk of battery short circuits caused by cooling leakage; however, if single-sided cooling is applied, there are limitations in transferring heat generated from the battery cells to the cooling channel due to the low thermal conductivity of the battery cells, and if double-sided cooling is applied, there are problems such as increased costs due to the addition of a cooling channel and various limitations arising from the need to avoid venting holes. FIG. 1 is a perspective view illustrating a structure in which a front laminate is separated in a battery according to the present invention, and FIG. 2 is an exploded perspective view illustrating a battery according to a first embodiment of the present invention, and FIG. 3 is a perspective view illustrating a structure in which a battery is assembled according to a first embodiment of the present invention, and FIG. 4 is a perspective view illustrating the structure of a flow path formed in a battery according to a first embodiment of the present invention, and FIG. 5 is an exploded perspective view illustrating a battery according to a second embodiment of the present invention, and FIG. 6 is a perspective view illustrating a structure in which a battery is assembled according to a second embodiment of the present invention, and FIG. 7 is a perspective view illustrating the structure of a flow path formed in a battery according to a second embodiment of the present invention, and FIG. 8 is an exploded perspective view illustrating a battery according to a third embodiment of the present invention, and FIG. 9 is a perspective view illustrating a structure in which a battery is assembled according to a third embodiment of the present invention, and FIG. 10 is a perspective view illustrating the structure of a flow path formed in a battery according to a third embodiment of the present invention, and FIG. 11 is a plan view illustrating the structure of a flow path formed in the refrigerant portion of a battery according to the present invention, and FIG. 12 is a plan view illustrating a structure in which a battery according to the present invention is installed on one side of a cooling water channel. Hereinaf