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CN-122000528-A - Battery cell

CN122000528ACN 122000528 ACN122000528 ACN 122000528ACN-122000528-A

Abstract

The present application relates to a battery including a battery housing part housing an electrode stack including an electrode and a separator, and a cooling part including a groove formed in a plate surface of the cooling part, the cooling part being provided to be closely attached to an outer surface of the battery housing part, and defining a flow path in a space between the groove and the outer surface of the battery housing part such that a refrigerant flows along the flow path, whereby the performance of dissipating heat from a battery cell can be improved, a quick charge time can be shortened, high output of the battery cell is ensured, and cost and weight are reduced.

Inventors

  • LI JIANQIU
  • Cao Tingyuan

Assignees

  • 现代自动车株式会社
  • 起亚株式会社

Dates

Publication Date
20260508
Application Date
20250521
Priority Date
20241105

Claims (15)

  1. 1. A battery, comprising: a battery housing portion housing an electrode stack including an electrode and a separator, and A cooling part including a groove formed in a plate surface of the cooling part, the cooling part being attached to an outer surface of the battery receiving part, and defining a flow path in a space between the groove and the outer surface of the battery receiving part such that a refrigerant flows along the flow path.
  2. 2. The battery of claim 1, wherein the region of the flow path disposed at the end portion of the plate surface of the cooling portion is repeatedly curved such that the flow path is continuously formed in the direction of the plate surface of the cooling portion, and the first and second opposite end portions of the flow path are in fluid communication with each other to define a closed loop.
  3. 3. The battery according to claim 2, wherein the cooling portion includes: a vaporizing portion attached to at least one side surface of the battery housing portion so that the refrigerant is vaporized in the flow path, and And a condensing part attached to a lower surface of the battery receiving part to condense the refrigerant at the condensing part.
  4. 4. A battery according to claim 3, wherein the cooling liquid flows over the condensing portion to condense the refrigerant in the flow path.
  5. 5. The battery according to claim 3, wherein the cooling part is configured by a single cooling plate in a plate shape, and the cooling plate is bent such that a first portion of the cooling plate defines a vaporization attached to one side surface of the battery housing part, and a second portion of the cooling plate defines a condensation attached to a lower surface of the battery housing part, thereby forming a longitudinal section in an "L" shape as a whole.
  6. 6. A battery according to claim 3, wherein the cooling portion is configured by a plurality of cooling plates each having a plate shape, and the cooling plates are connected to each other by brazing such that some of the cooling plates define a vaporization portion attached to one side surface of the battery housing portion, and the remaining cooling plates define a condensation portion, thereby forming a longitudinal section having an "L" shape as a whole.
  7. 7. The battery according to claim 5 or 6, wherein the cooling portions are provided as two cooling portions symmetrically arranged with respect to the battery housing portion such that vaporization portions of the two cooling portions are attached to two opposite surfaces of the battery housing portion, and condensation portions of the two cooling portions are attached to a lower surface of the battery housing portion.
  8. 8. The battery according to claim 4, wherein the cooling portion is configured by a single cooling plate in a plate shape, and a plurality of portions of the cooling plate are bent such that some of the plurality of portions define vaporization attached to two opposite surfaces of the battery accommodating portion, and the remaining portions of the plurality of portions define condensation attached to a lower surface of the battery accommodating portion.
  9. 9. The battery according to claim 8, wherein the vaporization parts are formed on two opposite sides based on bent regions of the cooling plate, and the condensation part in thermal contact with the cooling liquid is formed between the vaporization parts.
  10. 10. The battery according to claim 3, wherein the vaporizing portion is provided at a side surface of the battery housing portion, the side surface having an area relatively larger than an area of the condensing portion.
  11. 11. The battery according to claim 1, wherein the cooling portion is connected to the battery housing portion by brazing.
  12. 12. The battery according to claim 11, wherein the cooling portion is formed integrally with the battery housing portion.
  13. 13. The battery according to claim 11, wherein the battery housing portion is configured to house a quadrangular cell.
  14. 14. The battery according to claim 1, further comprising a coolant passage provided to the cooling portion.
  15. 15. The battery according to claim 1, wherein the groove is formed to be recessed in a plate surface of the cooling portion such that a flow path is formed between an outer surface of the battery housing portion and the cooling portion.

Description

Battery cell Cross Reference to Related Applications The present application claims priority from korean patent application No.10-2024-0155658, filed on 5.11.2024, the entire contents of which are incorporated herein by reference for all purposes. Technical Field The present application relates to a battery, and more particularly, to a battery that can improve heat dissipation performance of a battery cell, shorten a quick charge time, ensure high output of the battery cell, and reduce cost and weight. Background With the continuous development of technology and the increasing demand for mobile devices such as mobile phones, notebook computers, camcorders, and digital cameras, research into technology on secondary batteries capable of being charged and discharged is actively being conducted. In addition, as an alternative energy source of fossil fuel that generates air pollutants, a secondary battery (secondary battery) is applied to an Electric Vehicle (EV), a Hybrid Electric Vehicle (HEV), a plug-in hybrid electric vehicle (P-HEV), or the like. Accordingly, there is an increasing demand for developing secondary batteries. The secondary batteries currently available in the market include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium secondary batteries, and the like. Among these batteries, lithium secondary batteries have little memory effect as compared with nickel-based secondary batteries, and have been attracting attention because they can be freely charged or discharged. In addition, lithium secondary batteries have a low self-discharge rate and a high energy density, and thus, they have been attracting attention. Meanwhile, when the above secondary battery is used in a device requiring a large capacity and a high voltage, such as an electric vehicle, the secondary battery may be used in the form of a battery cell assembly or a battery pack (battery pack) in which a plurality of battery cells are provided. The battery cell assembly, the battery pack, etc. may be affected by various operating environments of the device, for example, the charge amount and output of the battery pack, etc. may vary significantly depending on the temperature conditions. Therefore, a cooling device or a heating device is also provided at the same time to maintain the temperature of the battery pack at a predetermined condition. Since the battery cells are tightly packed in a narrow space, it is very important to easily remove heat generated from the respective battery cells. The charging or discharging process of the battery cell is realized through electrochemical reaction. For this reason, if the heat generated from the battery module is not effectively removed during the charge or discharge, the heat is accumulated, and thus, the deterioration of the battery module may be accelerated, and in some cases, fire or explosion may be caused. Examples of common cooling devices may include water-cooled and air-cooled cooling devices. The water cooling device is provided with a flow path provided at the outside or inside of the battery pack so that the refrigerant can flow along the flow path, and includes ports protruding outward to circulate the refrigerant. However, if the port is damaged by an external impact or the like applied thereto, there is a risk that the refrigerant may enter the inside of the battery pack, which may cause serious accidents. To prevent this, a coolant channel is installed outside the battery system to prevent the risk of short circuits occurring in the battery due to leakage of the coolant. However, in this case, if one-sided cooling is used, the transfer of heat generated from the battery cells to the coolant channels may be limited due to the low thermal conductivity of the battery cells. If the double-sided cooling is adopted, there are problems in that a lot of costs are generated due to the increase of the coolant passages, and various limitations occur because of the process of avoiding the exhaust holes. The information included in the background section of the application is only for enhancement of understanding of the general background of the application and is not to be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art. Disclosure of Invention Aspects of the present application are directed to providing a battery in which the performance of dissipating heat from a battery cell can be improved, a quick charge time can be shortened, high output of the battery cell is ensured, and cost and weight are reduced. In order to achieve the above object, the present application provides a battery including a battery housing portion housing an electrode stack including an electrode and a separator, and a cooling portion including a groove formed in a plate surface of the cooling portion, the cooling portion being provided to be closely attached to an outer surface of the batt