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EP-4738580-A1 - BATTERY ASSEMBLY

EP4738580A1EP 4738580 A1EP4738580 A1EP 4738580A1EP-4738580-A1

Abstract

Disclosed is a battery assembly. The battery assembly includes a base plate; a first side wall coupled to an upper surface of the base plate and extending in a front and rear direction; a second side wall coupled to the upper surface of the base plate and extending in the front and rear direction, the second side wall being spaced apart from the first side wall; a plurality of battery cells positioned between the first side wall and the second side wall and stacked in a right and left direction; and a top cover having one side coupled to the first side wall and the other side coupled to the second side wall.

Inventors

  • JO, SANG-HYUN
  • LEE, JEONG-WON
  • JEONG, CHAN-YOUNG

Assignees

  • LG Energy Solution, Ltd.

Dates

Publication Date
20260506
Application Date
20241017

Claims (13)

  1. A battery assembly comprising: a base plate; a first side wall coupled to an upper surface of the base plate and extending in a front and rear direction; a second side wall coupled to the upper surface of the base plate and extending in the front and rear direction, the second side wall being spaced apart from the first side wall; a plurality of battery cells positioned between the first side wall and the second side wall and stacked in a right and left direction; and a top cover having one side coupled to the first side wall and the other side coupled to the second side wall.
  2. The battery assembly according to claim 1, wherein the first side wall and the second side wall compress the plurality of battery cells in the right and left direction.
  3. The battery assembly according to claim 1, further comprising: a first fastening member configured to fasten the first side wall and the top cover; and a second fastening member configured to fasten the second side wall and the top cover.
  4. The battery assembly according to claim 1, further comprising: a third fastening member configured to fasten the first side wall and the base plate; and a fourth fastening member configured to fasten the second side wall and the base plate.
  5. The battery assembly according to claim 1, further comprising: a front cover positioned in front of the plurality of battery cells and having one side coupled to the first side wall and the other side coupled to the second side wall.
  6. The battery assembly according to claim 5, wherein the front cover includes: a body configured to cover between the first side wall and the second side wall; a first coupling portion extending rearward from the body and configured to cover an outer surface of the first side wall; and a second coupling portion extending rearward from the body and configured to cover an outer surface of the second side wall.
  7. The battery assembly according to claim 6, further comprising: a fifth fastening member configured to fasten the first coupling portion and the first side wall; and a sixth fastening member configured to fasten the second coupling portion and the second side wall.
  8. The battery assembly according to claim 1, wherein the plurality of battery cells constitute a first battery array, and wherein the battery assembly comprises: a third side wall coupled to the upper surface of the base plate and positioned rearward of the first side wall and extending in the front and rear direction; a fourth side wall coupled to the upper surface of the base plate and positioned rearward of the second side wall and extending in the front and rear direction; and a second battery array positioned between the third side wall and the fourth side wall and having a plurality of battery cells stacked in the right and left direction.
  9. The battery assembly according to claim 8, wherein one side of the top cover is coupled to the third side wall, and wherein the other side of the top cover is coupled to the fourth side wall.
  10. The battery assembly according to claim 8, further comprising: a first bracket having one side coupled to the first side wall and the other side coupled to the third side wall; and a second bracket having one side coupled to the second side wall and the other side coupled to the fourth side wall.
  11. The battery assembly according to claim 10, further comprising: a rear cover positioned rearward of the second battery array and having one side coupled to the third side wall and the other side coupled to the fourth side wall.
  12. A battery assembly comprising the battery assembly according to any one of claims 1 to 11.
  13. An energy storage system comprising the battery assembly according to any one of claims 1 to 11.

Description

TECHNICAL FIELD The present disclosure relates to a battery assembly. This application is based on and claims priority from Korean Patent Application No. 10-2023-0154000, filed on November 8, 2023, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. BACKGROUND ART Currently, commercially available secondary batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium secondary batteries and the like, and among them, lithium secondary batteries have little or no memory effect, and thus they are gaining more attention than nickel-based secondary batteries for their advantages that recharging can be done whenever it is convenient, the self-discharge rate is very low and the energy density is high. Recently, as issues such as power shortage and eco-friendly energy have come to the fore, an energy storage system (ESS) for storing generated power has been receiving more attention. For example, a smart grid system has been proposed as one of the methods for controlling power supply and demand. The amount of power consumed by consumers is not always constant and may fluctuate frequently. A representative example is that power consumption increases rapidly in the afternoon in the summer due to the use of air conditioners and then decreases rapidly at night. In terms of power consumers, power consumption is not constant and may fluctuate frequently, but in terms of power suppliers, it is realistically difficult to match such power consumption even if power production is controlled to some extent. Therefore, such imbalance in power supply and consumption may cause power oversupply or power shortage, and the smart grid system may flexibly store and control power to solve such problems. A smart grid system is a concept that stores electricity when or where there is a surplus of electricity, and supplies the stored electricity when or where there is a shortage of electricity. One of the key components for building such a smart grid system is an energy storage system for storing electricity. In addition, as the commercialization of electric vehicles has been in full swing, energy storage systems may also be utilized in facilities for charging electric vehicles, such as charging stations. Such an energy storage system may include a plurality of battery packs or battery assemblies. In order to reduce the weight of the energy storage system and increase the energy density, a structure is required that may stably accommodate battery cells while simplifying the structure of the battery assembly. DISCLOSURE Technical Problem The present disclosure is designed to solve these and other problems. The present disclosure is also directed to providing a battery assembly in which a plurality of battery cells are stably fixed. The present disclosure is also directed to providing a battery assembly with a reduced number of components and a simplified structure. The present disclosure is also directed to providing a battery assembly with improved energy density. Technical Solution In one aspect of the present disclosure, there is provided a battery assembly comprising: a base plate; a first side wall coupled to an upper surface of the base plate and extending in a front and rear direction; a second side wall coupled to the upper surface of the base plate and extending in the front and rear direction, the second side wall being spaced apart from the first side wall; a plurality of battery cells positioned between the first side wall and the second side wall and stacked in a right and left direction; and a top cover having one side coupled to the first side wall and the other side coupled to the second side wall. In addition, the first side wall and the second side wall may compress the plurality of battery cells in the right and left direction. In addition, the battery assembly may further comprise a first fastening member configured to fasten the first side wall and the top cover; and a second fastening member configured to fasten the second side wall and the top cover. In addition, the battery assembly may further comprise a third fastening member configured to fasten the first side wall and the base plate; and a fourth fastening member configured to fasten the second side wall and the base plate. In addition, the battery assembly may further comprise a front cover positioned in front of the plurality of battery cells and having one side coupled to the first side wall and the other side coupled to the second side wall. In addition, the front cover may include a body configured to cover between the first side wall and the second side wall; a first coupling portion extending rearward from the body and configured to cover an outer surface of the first side wall; and a second coupling portion extending rearward from the body and configured to cover an outer surface of the second side wall. In addition, the battery assembly may fur