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DE-102025146558-A1 - Cell connector, connector repair piece and battery, comprising such a connector

DE102025146558A1DE 102025146558 A1DE102025146558 A1DE 102025146558A1DE-102025146558-A1

Abstract

The invention relates to a connector. The invention is used in a battery system, particularly in electric vehicles. The connector comprises a main part and at least one positive terminal and/or one negative terminal and is characterized in that it comprises at least one connector branch for the positive terminal and/or at least one connector branch for the negative terminal, wherein the connector branch for the positive terminal and/or the connector branch for the negative terminal comprises a positioning part (8a, 8b) located within the outline of the main part 8 of the connector 2, which comprises at least one positioning means (6a, 6b), a terminal connection (10, 12) and a connecting section (10a, 12a) located between the terminal (10, 12) and the positioning part (8a, 8b).

Inventors

  • Bartosz Perenc
  • Barnaba Franciszek Czyszczon
  • Krzysztof Paweł Mateja
  • Tomasz Stefan Nowak
  • Dariusz Siwek
  • Łukasz Zbigniew Pawlik

Assignees

  • EMBS SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ

Dates

Publication Date
20260513
Application Date
20251111
Priority Date
20241112

Claims (18)

  1. Cell connector comprising a main part of the connector and at least one positive terminal and/or negative terminal, characterized in that it comprises at least one connector branch for the positive terminal and/or at least one connector branch for the negative terminal, wherein the connector branch for the positive terminal and/or the connector branch for the negative terminal comprises: - a positioning part (8a, 8b) located within the contour of the main part 8 of the connector 2, wherein the positioning part comprises at least one positioning means (6a, 6b) - a terminal (10, 12) and - a connecting section (10a, 12a) located between the terminal (10, 12) and the positioning part (8a, 8b).
  2. connector after Claim 1 , characterized in that the connecting section (10a, 10b) connects the higher positioning part (8a, 8b) to the lower pole connection (10, 12).
  3. connector after Claim 2 , characterized in that the connecting section (10a, 12a) includes a bend (13, 14) which forms a step between the positioning part (8a, 8b) and the pole connection (10, 12).
  4. connector after Claim 1 or Claim 2 or Claim 3 , characterized in that it is a left edge connector 2a and includes at least one connector branch 21 only for the negative pole.
  5. connector after Claim 1 or Claim 2 or Claim 3 , characterized in that it is a right edge connector 2c and includes at least one connector branch 20 for the positive pole only.
  6. connector after Claim 1 or Claim 2 or Claim 3 , characterized in that it is a middle connector 2b and comprises at least one branch 21 of the connector for both the negative pole and at least one branch 20 of the connector for the positive pole.
  7. Connector according to any of the preceding claims, characterized in that the positioning means is a mounting slot (6a, 6b).
  8. Connector according to any of the preceding claims, characterized in that the positioning means is a mounting hole (7).
  9. Battery comprising a core, characterized in that the core comprises a container (3) having on its upper side a mounting surface for the connector (3d) which includes at least one mounting means (11) and at least one connector according to any one of the Claims 1 until 8 , which is arranged on the mounting means (11).
  10. Repair piece of the connector branch for the positive pole, characterized in that it comprises: - a positioning part (8a') which can be attached to the main part 8 of the connector 2, wherein the positioning part comprises at least one positioning means (17) - a pole connection (10') and - a connecting section (10a') which is located between the pole connection (10') and the positioning part (8a').
  11. Repair piece according to Claim 10 , characterized in that the connecting section (10a') connects the higher positioning part (8a') to the lower pole connection (10').
  12. Repair piece according to Claim 11 , characterized in that the connecting section (10a') includes a bend (15) which forms a step between the positioning part (8a) and the connection (10').
  13. Repair piece according to Claim 10 or Claim 11 or Claim 12 , characterized in that the positioning means (17) is a mounting hole (17).
  14. Repair part of the connector branch for the negative pole, characterized in that it comprises: - a positioning part (8b') which can be attached to the main part (8) of the connector (2), wherein the positioning part (8b') comprises at least one positioning means (18) - a pole connection (12') and - a connecting section (12a') which is located between the connection (12') and the positioning part (8b).
  15. Repair piece according to Claim 14 , characterized in that the connecting section (12a') connects the higher positioning part (8b') to the lower pole connection (12').
  16. Repair piece according to Claim 15 , characterized in that the connecting section (12a') comprises a bend (16) which forms a step between forms the positioning part (8b') and the connection (12').
  17. Repair piece according to Claim 14 or Claim 15 or Claim 16 , characterized in that the positioning means (18) is a mounting hole (18).
  18. Battery comprising a core, characterized in that the core comprises a container (3) having on its upper side a mounting surface for the connector (3d), which includes at least one mounting means (11) and at least one repair piece of the branch according to any of the Claims 10 until 16 , which is arranged on the mounting means (11).

Description

The invention relates to a cell connector designed for attachment to cylindrical battery cells by laser welding. The invention also relates to a battery comprising cylindrical cells connected by such a connector. Repair components for the connector are also included. The invention is applicable to batteries for electric vehicles, including electric bicycles, and particularly to batteries that can be repaired. Solutions are currently known that enable the one-sided connection of cylindrical battery cells using the "wire bonding" method. The patent specification US 2007/0188147 A1 Disclosure reveals a method for connecting cylindrical cells using wire. In this solution, the wire connecting the cells also acts as a fuse. If the current becomes too high, for example during a short circuit, the wire breaks and the connection between the cells is severed. This type of cell connection allows the cells to be reconnected with a wire if the fuse fails. Furthermore, the "wire bonding" method is used in many other specific solutions where the cells are aligned so that they are all connected on one side, e.g. US 10,243,184 B1 One variation of wire bonding is the tape bonding method, which uses metal plates instead of wire. The different cross-sections and the way the metal plates are connected to the cell allow, for example, the transmission of higher current and a reduction in heat generation. Such connectors are used, for example, in the Lucid Air car battery and are attached to the cells using ultrasonic welding. The one-sided joining of cells using sheet metal connectors is also described in the patent specifications. US 2019/0296310 A1 , US 2024/0162572 A1 , WO 2022/235096 and WO 2022/005032 revealed. The sheet metal connectors are connected to the busbars, which transfer the energy to the main battery terminals. However, existing connection methods using sheet metal connectors do not allow for the replacement of individual cells when they wear out. Attempting to separate a single cell by cutting the connector irreparably damages the connector, leaving no possibility of reconnecting the cells. Furthermore, directly severing the connection between the connector and the cell permanently damages the connector, preventing any possibility of reconnecting the cells. The aim of the invention is therefore to provide a connector for connecting cells that are oriented in such a way that they can be connected on one side, whereby individual cells can be replaced, the stability of the connection is maintained and the connector is correctly positioned before and after the cell replacement. The essence of the invention is that the cell connector, comprising a main part of the connector and at least one positive terminal and/or one negative terminal, is characterized in that it comprises at least one connector branch for the positive pole and/or at least one connector branch for the negative pole, wherein the connector branch for the positive pole and/or the connector branch for the negative pole comprises a positioning part located within the outline of the main part of the connector, wherein the positioning part comprises at least one means for positioning the pole terminal and a connecting section located between the pole terminal and the positioning part. Preferably, the connecting section connects the higher-lying positioning part to the lower-lying pole connection. Preferably, the connecting section includes a bend that forms a step between the positioning part and the pole connection. Preferably, the connector is a left-hand edge connector and includes at least one connector branch for the negative pole only. Preferably, the connector is a right-hand edge connector and includes at least one connector branch for the positive pole only. Preferably, the connector is a middle connector and comprises at least one connector branch for both the negative pole and at least one connector branch for the positive pole. Preferably, the positioning means is a mounting slot. Preferably, the positioning means is a mounting hole. In a further embodiment of the invention, the essence consists in the fact that the battery, which comprises a core, is characterized by that the core comprises a container which has on its upper side a mounting surface for the connector, comprising at least one mounting means, and at least one connector according to the invention which is arranged on the mounting means. In yet another embodiment of the invention, the essence consists in the fact that the repair part of the connector branch for the positive pole is characterized in that it comprises a positioning part which can be abutted against the main part of the connector, wherein the positioning part comprises at least one positioning means, and further comprises a pole connection and a connecting section which is located between the pole connection and the positioning part. In yet another embodiment of the invention, the essence consists in the fact that th