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DE-102025127471-B3 - Method for manufacturing a battery, battery, motor vehicle

DE102025127471B3DE 102025127471 B3DE102025127471 B3DE 102025127471B3DE-102025127471-B3

Abstract

A method for manufacturing a battery (100) for a motor vehicle (200) is proposed, wherein battery cells (1) are arranged on a cell carrier (2), the cell carrier (2) being inserted into a battery housing (3), the cell carrier (3) having a groove (4) comprising an inlet (4.1) and an outlet (4.2) located next to the inlet (4.1), the groove (4) extending from the inlet (4.1) to the outlet (4.2) along the sides of the cell carrier (2) towards the battery housing (3), and a sealing agent being introduced into the inlet (4.1) until the sealing agent emerges at the outlet (4.2). Furthermore, a battery (100) and a motor vehicle (200) are proposed.

Inventors

  • Tobias Totzke

Assignees

  • DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT

Dates

Publication Date
20260513
Application Date
20250714

Claims (10)

  1. Method for manufacturing a battery (100) of a motor vehicle (200), wherein battery cells (1) are arranged on a cell carrier (2), wherein the cell carrier (2) is inserted into a battery housing (3), wherein the cell carrier (2) has a groove (4), wherein the groove (4) has an inlet (4.1) and an outlet (4.2) arranged next to the inlet (4.1), wherein the groove (4) is arranged extending from the inlet (4.1) to the outlet (4.2) towards the battery housing (3) along the sides of the cell carrier (2), wherein a sealing agent is introduced into the inlet (4.1) until the sealing agent emerges at the outlet (4.2).
  2. Procedure according to Claim 1 , characterized in that the cell carrier (2) is bonded to the battery housing (3) with the sealant.
  3. Method according to one of the preceding claims, characterized in that the cell carrier (2) has venting openings (2.1) and the battery housing (3) has further venting openings (3.1), wherein the venting openings (2.1) and the further venting openings (3.1) are arranged one above the other.
  4. Procedure according to Claim 3 , characterized in that a metal foil, in particular a metal adhesive tape (6), is applied to the outside of the battery housing (3) at least over the further venting openings.
  5. Method according to one of the preceding claims, characterized in that the battery cells (1) are potted on the cell carrier (2) before being inserted into the battery housing (3).
  6. Procedure according to Claim 5 , characterized in that the escape of potting compound (10) during potting is prevented by a raised edge (7) of the cell carrier (2).
  7. Method according to one of the preceding claims, characterized in that an upper cell carrier (5) is arranged on the battery cells (1) before insertion into the battery housing (3), wherein the upper cell carrier (5) is preferably bonded to the battery cells (1), wherein the upper cell carrier (5) is particularly bonded to the battery cells (1) at specific points.
  8. Procedure according to Claim 7 , characterized in that the cell carrier (2) and the upper cell carrier (5) are arranged such that less than 25% and in particular less than 10% of the side surfaces of the respective battery cells (1) are in direct contact with the cell carrier (2) and the upper cell carrier (5).
  9. Battery (100) for a motor vehicle (200), characterized in that the battery (100) has battery cells (1) which are arranged on a cell carrier (2), wherein the cell carrier (2) is arranged on a battery housing (3), wherein the cell carrier (2) has a groove (4) in which a sealing agent is arranged which bonds the cell carrier (2) to the battery housing (3) and seals an interior of the battery (100), wherein the battery (100) is preferably manufactured using a method according to one of the preceding claims.
  10. motor vehicle (200) having a battery (100) according to Claim 9 .

Description

The present invention relates to a method for manufacturing a motor vehicle battery. The present invention further relates to a motor vehicle battery and a motor vehicle. Electric and hybrid vehicles have an electrified powertrain. The main components of such an electrified powertrain are the electric motor for traction, the battery for supplying the electric motor with electrical energy, and the power electronics, which supplies energy from the battery to the electric motor as needed. The battery of the vehicle, as defined in the present invention, is the so-called traction battery, i.e., a high-voltage battery for supplying the powertrain. Current developments in electrified powertrains focus not only on increasing efficiency but also on ensuring durability and simplifying the manufacturing processes of the powertrain components. A battery typically consists of multiple battery cells. These cells are arranged within a battery casing, where they are temperature-controlled, particularly cooled, and secured. The cells are usually secured by pressing them into the casing. This creates a tight seal between the cells and the casing, preventing them from shifting during operation, especially during acceleration, deceleration, or steering maneuvers. During battery operation, the battery cells regularly undergo changes in size. Experts refer to this as swelling or breathing. The compression of the battery cells within the battery casing leaves little room for such changes. From the printed text DE 10 2022 133 863 A1 A traction battery for a motor vehicle is known. The traction battery has a battery housing in which battery cells are arranged. The battery housing has venting openings for degassing the battery cells. It is therefore an object of the present invention to provide a method for manufacturing a battery, a motor vehicle battery and a motor vehicle which do not have the aforementioned disadvantages of the prior art, but enable simple manufacturing of the battery in conjunction with an advantageous arrangement of the battery cells which allows a change in the size of the battery cells and at the same time a high degree of safety against leakage of a coolant from the battery housing. This problem is solved by a method for manufacturing a motor vehicle battery according to claim 1. Furthermore, this problem is solved by a motor vehicle battery according to claim 9 and by a motor vehicle according to claim 10. The method according to the invention is a method for manufacturing a motor vehicle battery, in particular a traction battery for a motor vehicle. To manufacture the battery, battery cells are arranged on a cell carrier. The cell carrier preferably has ribs between which the battery cells can be inserted. The ribs advantageously stabilize the battery cells in their position during the manufacturing process. The cell carrier with the battery cells is inserted into a battery housing. A groove is provided on the cell carrier, which faces the battery housing. The groove has an inlet on one side of the cell carrier and an outlet directly next to the inlet. From the inlet, the groove extends along the sides of the cell carrier to the outlet. In other words, the groove is practically a circumferential groove. To seal and fix the cell carrier in the battery housing, a sealant is introduced into the groove at the inlet until it emerges at the outlet. This applies the sealant circumferentially and connects the cell carrier to the battery housing. Advantageous embodiments and further developments of the invention can be found in the dependent claims and in the description with reference to the drawings. According to a preferred embodiment of the present invention, the cell carrier is bonded to the battery housing with the sealant. This achieves a high degree of security against movement of the cell carrier and the batteries along the XY plane of the vehicle. A particularly preferred embodiment of the present invention is one in which the cell carrier has venting openings and the battery housing has further venting openings. The venting openings and the further venting openings are arranged one above the other. This advantageously makes it possible to protect the battery cells in the event of thermal runaway. To degas in a targeted manner. The groove is positioned so that it surrounds the venting openings. This advantageously prevents coolant from escaping the battery through the other venting openings. According to a further preferred embodiment of the present invention, a metal foil, in particular a metal adhesive tape, is affixed to the outside of the battery housing, at least over the additional venting openings. This prevents dirt from entering the battery through the additional venting openings. Furthermore, the metal foil ensures compliance with EMC requirements. In addition, the application of the metal adhesive tape is very simple, which facilitates manufacturing. According to a further preferred embodiment