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DE-102024132601-A1 - Method for manufacturing a battery base for a motor vehicle, a battery base and a battery for a motor vehicle

DE102024132601A1DE 102024132601 A1DE102024132601 A1DE 102024132601A1DE-102024132601-A1

Abstract

A method for manufacturing a battery base (100) for a motor vehicle battery is proposed. The method comprises the following steps: • Providing a base plate (10) wherein the base plate has a first side (12) and a second side (14), and • Applying a metal (13) to one of the two sides (12, 14) of the base plate (10) at least in a predefined area (A).

Inventors

  • Christian Paul

Assignees

  • BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT

Dates

Publication Date
20260513
Application Date
20241108

Claims (8)

  1. A method for manufacturing a battery base (100) for a motor vehicle battery, comprising the following steps: • Providing a base plate (10), wherein the base plate has a first side (12) and a second side (14), and • Applying a metal (13) to one of the two sides (12, 14) of the base plate (10) at least in a predefined area (A).
  2. Procedure according to Claim 1 , wherein the metal (13) is applied according to a pattern (15).
  3. Method according to one of the preceding claims, wherein the metal (13) is applied by means of a welding process to form at least one weld seam (16).
  4. Method according to one of the preceding claims, wherein the metal (13) is applied layer by layer using an additive manufacturing process.
  5. Method according to one of the preceding claims, wherein the total wall thickness of the battery base (100) is increased at least partially by 2.00 mm to 4.50 mm by the application of the metal (13).
  6. Method according to one of the preceding claims, wherein the metal (13) is applied to the first side (12) of the base plate (10), wherein the first side (12) of the base plate (10) is the outside of the base plate (10).
  7. Battery base (100) for a battery for a motor vehicle, which is manufactured according to a method according to one of the Claims 1 until 6 is manufactured.
  8. Battery for a motor vehicle, comprising a battery base (100) according to Claim 7 .

Description

The invention relates generally to the field of batteries for motor vehicles. In particular, the invention relates to a method for manufacturing a battery base for a motor vehicle, such a battery base, and such a battery for a motor vehicle. The safety of vehicle traction batteries is a critical issue addressed intensively by manufacturers and regulatory authorities. Modern lithium-ion batteries, for example, must comply with specific safety standards. Battery technology is constantly evolving to improve safety. New materials, cell chemistries, and battery management systems aim to minimize the risk of overheating, short circuits, and other potential hazards. Key factors for battery safety include robust construction, efficient cooling systems, and adherence to stringent testing and certification procedures. Despite these advances, aspects such as fire protection, protection against mechanical damage, and handling in the event of accidents continue to pose challenges. The object of the present invention is to address the challenges described above and, in particular, to overcome at least some of the disadvantages of the prior art. Specifically, the invention aims to provide an improved method for manufacturing a battery base for a motor vehicle, enabling the production of an improved battery base. The invention also aims to provide an improved battery for a motor vehicle. The invention is defined in the independent claims. Advantageous embodiments of the invention are described in the dependent claims and the following description. A first aspect of the present disclosure relates to a method for manufacturing a battery base for a motor vehicle battery. The method comprises the following steps: • Providing a base plate, wherein the base plate has a first side and a second side, and • Applying a metal to one of the two sides of the base plate, at least in a predefined area. A method for manufacturing a battery base for a motor vehicle is proposed, which can start with a base plate. A base plate, having a first and a second side, can be provided in a first process step. This can be a functional base plate, i.e., a base plate suitable for installation in a battery or battery housing. In a second process step, a metal can be applied to at least a defined area of this base plate. Possible metals include aluminum, steel, and metal alloys such as steel-chromium. The base plate can consist primarily of sheet steel. The base plate can be made of deep-drawn steel, high-strength steel, and/or stainless steel. High-strength steel can prove advantageous because this type of steel offers high strength at a lower weight. The predefined area of the floor panel can designate a specific section or area of the battery tray that may be particularly susceptible to damage in the event of an accident or impact to the battery or the floor panel. The predefined area may therefore be an area that, due to its location and/or geometry, may have an increased risk of damage. The battery base can be designed to protect the sensitive battery cells of a motor vehicle battery from mechanical damage, e.g., in accidents or impacts from below. The battery base can be an integral part of the battery housing. The battery base can form the bottom of a battery housing. By selectively applying metal to the base plate, the mechanical stability and impact resistance of the entire battery base can be improved. By selectively applying the metal only to critical areas, weight can be saved while simultaneously improving the required mechanical properties. This method can produce a battery base that contributes to increased safety and reliability of the entire battery system in the vehicle. Another advantage of this method is that a mass-produced base plate can be reused to meet varying impact resistance requirements for the battery base. Subsequent modifications or processing of the base plate eliminate the need to redesign the entire production process. This allows for a high degree of flexibility to accommodate the diverse requirements. to meet the safety standards of various authorities. According to one embodiment, the metal is applied according to a pattern. By selectively and patternfully applying the metal to critical areas, the impact resistance of the battery base can be specifically enhanced. For example, a grid pattern of metal strips on the outer edges and corners of the base plate can reinforce these areas. A radially symmetrical pattern with concentrically arranged metal rings can help to efficiently dissipate shocks and impacts. An irregular but strategically placed distribution of metal dots can increase impact resistance, particularly across the entire surface. A star-shaped pattern for applying the metal to the base plate can also be an effective way to selectively improve impact resistance. A radial arrangement of a metal coating or metal strips can improve shock and impact dissipation. According to one embodiment, the metal is applied