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DE-102025107767-B3 - BATTERY BUSBAR SYSTEM, METHOD FOR ASSEMBLING THE BATTERY BUSBAR SYSTEM, ELECTRICAL ENERGY STORAGE AND METHOD FOR MANUFACTURING THE ELECTRICAL ENERGY STORAGE

DE102025107767B3DE 102025107767 B3DE102025107767 B3DE 102025107767B3DE-102025107767-B3

Abstract

The invention relates to a battery busbar system (15), a method for assembling the battery busbar system (10), an electrical energy storage device, and a method for manufacturing the electrical energy storage device, wherein the battery busbar system (15) comprises a cell connector (55), a flexible printed circuit board (60) with a conductor track (80), a contact device (65), a spring element (155), and at least one temperature sensor (160), wherein the flexible printed circuit board (60) comprises a base section (100) and an arm section (105) arranged on the base section (100), wherein the ribbon-shaped arm section (105) comprises a contact section (140) and a substantially curved shaped section (135) adjoining the base section (100), wherein the temperature sensor (160) is arranged on the contact section (140), and the conductor track (80) extends over the arm section (105) and the base section (100), wherein the base section (100) the contact device (65) is arranged and the conductor track (80) electrically connects the temperature sensor (160) to the contact device (65), wherein the cell connector (55) is arranged in a stacked manner between the system section (140) and the base section (100) and the spring element (155) is arranged between the system section (140) and the intermediate section (95), wherein the spring element (155) provides a clamping force (FS) when clamped.

Inventors

  • Lennart Frank

Assignees

  • YAZAKI SYSTEMS TECHNOLOGIES GMBH

Dates

Publication Date
20260513
Application Date
20250228

Claims (11)

  1. Battery busbar system (15) for an electrical energy storage device (10) of a vehicle, - wherein the battery busbar system (15) comprises at least one cell connector arrangement (50) with at least one cell connector (55), a flexible printed circuit board (60) with at least one conductor arrangement (75) with at least one conductor (80), a contact device (65), a spring element (155), and at least one temperature sensor (160), - wherein the flexible printed circuit board (60) comprises a base section (100) and an arm section (105) arranged on the base section (100) and extending away from the base section (100), - wherein the ribbon-shaped arm section (105) comprises a contact section (140) and a substantially curved shaped section (135) adjoining the base section (100), - wherein the temperature sensor (160) is arranged on the contact section (140) and the conductor extends (80) extends over the arm section (105) and the base section (100), - wherein the contact device (65) is arranged on the base section (100) and the conductor track (80) electrically connects the temperature sensor (160) to the contact device (65), - wherein the base section (100) and at least one intermediate section (95) of the cell connector (55) are arranged parallel to each other, - wherein the cell connector (55) is arranged in a stacked manner between the contact section (140) and the base section (100) and the spring element (155) is arranged between the contact section (140) and the intermediate section (95), - wherein the spring element (155) is configured to provide a clamping force (FS) when clamped, and the intermediate section (95) is configured to provide a counterforce (FG) to the clamping force (FS), - wherein the spring element (155) is configured to use the clamping force (FS) to clamp the contact section (140) away from the cell connector (55).
  2. Battery busbar system (15) according to Claim 1 , - wherein the forming section (135) is arc-shaped, in particular U-shaped, and extends from a fixed end of the arm section (105) between the attachment section (140) and the base section (100) around the intermediate section (95).
  3. Battery busbar system (15) according to one of the preceding claims, - wherein the spring element (155) is connected on one side to the intermediate section (95) and on the other side to the mounting section (140), - wherein on a side facing away from the cell connector (55) the mounting section (140) has a battery mounting surface (150) for thermal contacting an energy storage cell (25, 30) of the electrical energy storage device (10), - wherein the temperature sensor (160) is arranged on a side of the mounting section (140) facing the cell connector (55) and is thermally connected to the battery mounting surface (150).
  4. Battery busbar system (15) according to one of the preceding claims, - wherein the system section (140), the intermediate section (95) and the base section (100) have at least a partial overlap along an axis (z), - wherein the axis (z) is inclined, preferably perpendicular, to the intermediate section (95).
  5. Battery busbar system (15) according to one of the preceding claims, - wherein the arm section (105) is connected to the base section (100) at a fixed end (125), - wherein the base section (100) extends substantially in a first plane (110), - wherein the attachment section (140) extends substantially in a second plane (145) and is preferably aligned parallel to the base section (100).
  6. Battery busbar system (15) according to one of the preceding claims, - wherein the intermediate section (95) of the cell connector (55) is ribbon-shaped and extends substantially along a first principal extension direction (115), - wherein the arm section (105) extends substantially along a second principal extension direction (120), - wherein the second principal extension direction (120) is inclined, in particular perpendicular, to the first principal extension direction (115).
  7. Battery busbar system (15) according to one of the preceding claims, - wherein the base section (100) has a recess (130), - wherein the arm section (105) protrudes from the recess (130), - wherein the recess (130) essentially follows a development of the arm section (105).
  8. Battery busbar system (15) according to one of the preceding claims, - wherein the spring element (155) is designed as a hollow body at least in sections, - wherein the spring element (155) is arranged circumferentially around the temperature sensor (160).
  9. Method for assembling a battery busbar system (15) according to one of the preceding claims, - wherein the cell connector assembly (50) with at least the cell connector (55), the flexible printed circuit board (60), the contact device (65), the spring element (155), and the temperature sensor (160) are provided, - wherein the contact device (65) and the temperature sensor (160) are arranged on the flexible printed circuit board (60), - wherein the spring element (155) is arranged on the contact section (140) of the arm section (105), - wherein the flexible printed circuit board (60) is arranged on the cell connector assembly (50) such that the base section (100) is offset and parallel to the intermediate section (95), - wherein the arm section (105) is bent out of the base section (100) around the cell connector (55) in the forming section (135) such that the spring element (155) is positioned between the contact section (140) and the intermediate section (95) of the cell connector (55) and the intermediate section (95) between the base section (100) and the spring element (155).
  10. Electrical energy storage device (10) for a vehicle, - wherein the electrical energy storage device (10) is a battery busbar system (15) according to one of the Claims 1 until 8 and an energy storage cell arrangement (20) comprising at least one first energy storage cell (25) and a second energy storage cell (30) arranged offset from the first energy storage cell (25), - wherein the battery busbar system (15) is arranged on the energy storage cell arrangement (20), - wherein the cell connector (55) is electrically connected at a first connection section (85) to a terminal (35, 40) of the first energy storage cell (25) and at a second connection section (90) to a terminal (35, 40) of the second energy storage cell (30), - wherein the intermediate section (95) electrically and mechanically connects the first connection section (85) to the second connection section (90), - wherein the spring element (155) with the tension force (FS) presses the mounting section (140) against the first energy storage cell (25) and the temperature sensor (160) is thermally connected to the first energy storage cell (25).
  11. Method for manufacturing the electrical energy storage device (10) according to Claim 10 , - wherein the battery busbar system (15) is configured according to one of the Claims 1 until 8 an energy storage cell arrangement (20) comprising the first energy storage cell (25) and the second energy storage cell (30) arranged offset from the first energy storage cell (25), - wherein the battery busbar system (15) is arranged along a mounting axis (175) on the energy storage cell arrangement (20), - wherein the cell connector (55) is electrically connected at the first connection section (85) to the terminal (35, 40) of the first energy storage cell (25) and at the second connection section (90) to the terminal (35, 40) of the second energy storage cell (30), - wherein the spring element (155) is tensioned between the intermediate section (95) and the first energy storage cell (25) such that the spring element (155) with the tension force (FS) presses the mounting section (140) against the first energy storage cell (25) and the temperature sensor (160) is thermally connected to the first energy storage cell (25). becomes.

Description

The invention relates to a battery busbar system according to claim 1, a method for assembling the battery busbar system according to claim 9, an electrical energy storage device according to claim 10 and a method for manufacturing the electrical energy storage device according to claim 11. Out of EP 3 565 022 B1 is a flexible printed circuit board and a carrier device for an electrical energy storage device. Furthermore, it is from DE 10 2023 111 286 A1 a measuring device for an electrical energy storage device and an electrical energy storage device with the measuring device are known. Furthermore, it shows CN 2 07 183 388 U a battery module comprising a variety of batteries, a variety of electrically connecting films, and an FPC. The object of the invention is to provide an improved battery busbar system, an improved method for assembling the battery busbar system, an improved electrical energy storage device and an improved method for manufacturing the electrical energy storage device. This problem is solved by means of a battery busbar system according to claim 1, a method for assembling the battery busbar system according to claim 9, an electrical energy storage device according to claim 10, and a method for manufacturing the electrical energy storage device according to claim 11. Advantageous embodiments are specified in the dependent claims. It was recognized that an improved battery busbar system for a vehicle's electrical energy storage system can be provided by comprising at least one cell connector assembly with at least one cell connector, a flexible printed circuit board with at least one conductor arrangement with at least one conductor track, a contact device, a spring element, and at least one temperature sensor. The flexible printed circuit board has a base section and an arm section arranged on the base section and extending away from it. The ribbon-shaped arm section has a contact section, for example, substantially plate-shaped, and a substantially curved forming section adjoining the base section. The temperature sensor is arranged on the contact section, and the conductor track extends over the arm section and the base section. The conductor track electrically connects the temperature sensor to the contact device. The contact device is arranged on the base section. Furthermore, the base section and at least one intermediate section of the cell connector can be arranged parallel to and offset from each other. The cell connector is arranged in a stacked configuration between the contact section and the base section, and the spring element is arranged between the contact section and the intermediate section. The spring element is designed to provide a tension force when under tension, and the intermediate section is designed to provide a counterforce to the tension force, wherein the spring element is designed to use the tension force to push the attachment section away from the cell connector. This design has the advantage that, due to the stacked configuration of the battery busbar system, it is particularly suitable for energy storage cell arrangements with a high number of energy storage cells in a small space, especially for electrical energy storage cell arrangements with cylindrical cells. The spring element ensures reliable contact of the temperature sensor, allowing the battery busbar system to reliably provide information about the temperature measured by the temperature sensor at the contact device. In a further embodiment, the forming section is arc-shaped, in particular U-shaped, and extends from a fixed end of the arm section between the contact section and the base section around the intermediate section. This design has the advantage that the arc-shaped, in particular U-shaped, design prevents a kink in the flexible printed circuit board and thus ensures a long service life for the flexible printed circuit board even under large temperature fluctuations and therefore a large pivoting movement of the arm section. In a further embodiment, the spring element is connected on one side to the intermediate section and on the other side to the contact section, wherein the contact section has a battery contact surface on a side facing away from the cell connector for thermal contact with an energy storage cell of the electrical energy storage system. The temperature sensor is arranged on a side of the contact section facing the cell connector and is thermally connected to the battery contact surface. This design has the advantage that the battery contact surface can be flat, thus ensuring good, even contact between the battery contact surface and the associated cell. ten electrical energy storage cells are ensured. In a further embodiment, the system section, the intermediate section, and the base section have at least partial overlap along an axis. The axis is inclined, preferably perpendicular, to the intermediate section. The overlap has the advantage of ensuring the stacked co