METHOD FOR MANUFACTURING A BATTERY, AND CORRESPONDING MANUFACTURING DEVICE

Abstract

A method for manufacturing a battery, which has a battery housing and at least one cell module, the cell module being introduced into the battery housing to form an intermediate space between a wall of the battery housing and the cell module, and a heat conducting medium then being introduced by an introduction device into the intermediate space. One operating mode is selected from a first operating mode of the introduction device and a second operating mode of the introduction device and is used for introducing the heat conducting medium, with the introduction of the heat conducting medium in the first operating mode occurring with an introduction volume flow set to a preset volume flow and in the second operating mode occurring with an introduction pressure set to a preset pressure.

Claims

1-10. (canceled)

11. A method for manufacturing a battery that has a battery housing and at least one cell module, wherein the cell module is introduced into the battery housing to form an intermediate space between a wall of the battery housing and the cell module, and a heat conducting medium is then introduced into the intermediate space by an introduction device, wherein one operating mode is selected from a first operating mode of the introduction device and a second operating mode of the introduction device and is used for introducing the heat conducting medium, with the introduction of the heat conducting medium in the first operating mode is carried out with a volumetric flow rate set to a preset introduction volume flow and in the second operating mode with an introduction pressure set to a preset pressure.

12. The method of claim 11, wherein at the beginning of the introduction of the heat conducting medium, the first operating mode is used and then switched to the second operating mode.

13. The method of claim 11, wherein the selection of the operating mode is carried out depending on a pressure of the heat conducting medium.

14. The method of claim 13, wherein the pressure of the heat conducting medium is measured in the intermediate space or upstream of an outlet opening of the introduction device.

15. The method according to claim 14, wherein the outlet opening is fluidically connected to a static mixer and the pressure is measured fluidically downstream of the static mixer.

16. The method of claim 14, wherein the first operating mode is used when the measured pressure is below a limit value and the second operating mode is used when the pressure at least corresponds to the limit value.

17. The method of claim 16, wherein the first operating mode is used continuously during the introduction and the second operating mode is used continuously from introduction or exceeding of the limit value by the measured pressure until the end of the introduction.

18. The method of claim 11, wherein the introduction in the first operating mode takes place with a higher introduction volume flow than in the second operating mode.

19. A manufacturing device for manufacturing a battery having a battery housing and at least one cell module, wherein the manufacturing device is provided and designed to introduce the cell module, to form an intermediate space between a wall of the battery housing and the cell module, into the battery housing and then to introduce a heat conducting medium into the intermediate space by an introduction device, wherein the manufacturing device is further provided and designed to select, from a first operating mode of the introduction device and a second operating mode of the introduction device, an operating mode and to use it for introducing the heat conducting medium, the intro-duction of the heat conducting medium in the first operating mode being carried out with an introduction volume flow set to a preset volume flow and in the second operating mode with an introduction pressure set to a preset pressure.

20. The manufacturing device of claim 19, wherein a pressure sensor for measuring a pressure of the heat conducting medium is fluidically arranged be-tween a static mixer and an outlet opening through which the heat con-ducting medium exits for introduction into the intermediate space.

21. The method of claim 12, wherein the selection of the operating mode is carried out depending on a pressure of the heat conducting medium.

22. The method of claim 15, wherein the first operating mode is used when the measured pressure is below a limit value and the second operating mode is used when the pressure at least corresponds to the limit value.

23. The method of claim 12, wherein the introduction in the first operating mode takes place with a higher introduction volume flow than in the second operating mode.

24. The method of claim 13, wherein the introduction in the first operating mode takes place with a higher introduction volume flow than in the second operating mode.

25. The method of claim 14, wherein the introduction in the first operating mode takes place with a higher introduction volume flow than in the second operating mode.

26. The method of claim 15, wherein the introduction in the first operating mode takes place with a higher introduction volume flow than in the second operating mode.

27. The method of claim 16, wherein the introduction in the first operating mode takes place with a higher introduction volume flow than in the second operating mode.

28. The method of claim 17, wherein the introduction in the first operating mode takes place with a higher introduction volume flow than in the second operating mode.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0039] The invention is explained in more detail below with reference to the exemplary embodiments illustrated in the drawing, without the invention being restricted. In particular:

[0040] FIG. 1 shows a schematic representation of a manufacturing device for manufacturing a battery having a battery housing and at least one cell module, and

[0041] FIG. 2 shows a diagram in which a volume flow and a pressure of a heat conducting medium introduced into the battery by means of an introduction device are plotted over time.

DETAILED DESCRIPTION

[0042] FIG. 1 shows a schematic representation of a manufacturing device 1 which is used to manufacture a battery which has a battery housing and at least one cell module. In particular, an introduction device 2 of the manufacturing device 1 is shown, by means of which a heat conducting medium can be introduced into the battery. More specifically, the battery has an intermediate space formed by introducing the cell module into the battery case. The intermediate space is between a wall of the battery case and the cell module.

[0043] The introduction device 2 is used to introduce a heat conducting medium into this intermediate space. Only part of the introduction device 2 is shown here, namely a static mixer 3 and a nozzle 4, the nozzle 4 having an outlet opening 5 at the end. The heat conducting medium is discharged through the outlet opening 5 for introduction into the intermediate space. In terms of flow, there is a pressure sensor 6 between the static mixer 3 and the nozzle 4, by means of which the pressure of the heat conducting medium can be determined at this point.

[0044] Provision is now made for the introduction device 2 to be operable in different operating modes, namely at least in a first operating mode and a second operating mode. In the first operating mode, the introduction of the heat conducting medium into the intermediate space is carried out with an introduction volume flow set to a preset volume flow. In the second operating mode, on the other hand, the heat conducting medium is introduced with an introduction pressure set to a preset pressure.

[0045] This ensures that, despite rapid introduction of the heat conducting medium into the intermediate space, a permissible pressure of the heat conducting medium in the intermediate space is not exceeded, so that damage to the battery is reliably avoided. The introduction volume flow is, for example, at least 1 cm.sup.3/s and at most 15 cm.sup.3/s, for example at least 2 cm.sup.3/s and at most 10 cm.sup.3/s, particularly preferably at least 4 cm.sup.3/s and at most 9 cm.sup.3/s. A pressure of at least 2 bar and at most 10 bar, at least 4 bar and at most 8 bar or approximately or exactly 4 bar or 6 bar is used as the preset pressure.

[0046] FIG. 2 shows a diagram in which curves 7 and 8 are shown over time t. The curve 7 shows the volume flow V of the heat conducting medium and the curve 8 the pressure, which is measured by the pressure sensor 6. The measured pressure p is preferably set equal to or corresponds to the introduction pressure. It is clear that at the beginning of the introduction, the introduction takes place with a comparatively high volume flow Vo. First, the measured pressure p is low. However, starting from time t.sub.0, it increases until, at time t.sub.1, it reaches a pressure p.sub.1, which is used as a limit value for switching between the first operating mode and the second operating mode.

[0047] At time t.sub.1, there is a switchover from the first operating mode to the second operating mode, and the heat conducting medium is then introduced in the second operating mode. In this mode, the introduction pressure corresponding to the measured pressure is set to the preset pressure, which corresponds to the limit value. From this it follows that the pressure remains constant after time t.sub.1, whereas the volume flow decreases steadily.

[0048] The introduction of the heat conducting medium in the second operating mode is carried out until the desired amount of heat conducting medium has been introduced into the intermediate space. The procedure described using the manufacturing device 1 shown has the advantage that an extremely rapid introduction of the heat conducting medium into the intermediate space is ensured, while at the same time damage to the battery to be manufactured is reliably avoided.

REFERENCE LIST

[0049] 1 manufacturing device [0050] 2 introduction device [0051] 3 static mixer [0052] 4 nozzle [0053] 5 outlet opening [0054] 6 pressure sensor [0055] 7 curve [0056] 8 curve