Drive Battery for a Motor Vehicle, and Motor Vehicle Comprising Such a Drive Battery

Patent metadata

Field	Value
Publication number	US-2024258599-A1
Application number	US-202218290864-A
Country	US
Kind code	A1
Filing date	Jul 22, 2022
Priority date	Jul 23, 2021
Publication date	Aug 1, 2024
Grant date	—

Abstract

A drive battery for a motor vehicle has a drive battery housing which has a top wall and a bottom wall. Located in the drive battery housing are a battery cell layer having a plurality of battery cells arranged vertically and next to one another and a support layer, which can also be referred to as a degassing layer, spacer layer, or deformation layer. The battery cell layer is bonded to the top wall by way of an upper adhesive layer and to the support layer by way of a lower adhesive layer, in particular over a large area, for example over its entire surface. The support layer is also bonded to the bottom wall by way of a further adhesive layer.

First claim

1 .- 26 . (canceled)

27 . A drive battery for a motor vehicle, comprising:
a drive battery housing which has a cover wall and a base wall; a battery cell layer having a multiplicity of battery cells, which are arranged vertically and next to one another; and a support layer, wherein the support layer and the battery cell layer are disposed in the drive battery housing, wherein the battery cell layer is adhesively bonded across a large area, to the cover wall via an upper adhesive layer and to the support layer via a lower adhesive layer, and the support layer is further adhesively bonded to the base wall via a further adhesive layer.

28 . The drive battery according to claim 27 , wherein
each battery cell is composed of a battery cell housing in which a jelly roll is received, an upper end side of the battery cell housing is in each case adhesively bonded to the cover wall, and a lower end side of the battery cell housing is in each case adhesively bonded to the support layer.

29 . The drive battery according to claim 27 , wherein
the battery cell layer is formed from a multi-chamber structure having a multiplicity of vertical chambers in which, in each case, one or a plurality of jelly rolls are received, an upper end side of the multi-chamber structure is adhesively bonded to the cover wall, and a lower end side of the multi-chamber structure is adhesively bonded to the support layer.

30 . The drive battery according to claim 27 , further comprising:
a battery cell contacting system embedded in the upper adhesive layer and/or in the lower adhesive layer.

31 . The drive battery according to claim 30 , wherein
the battery cell contacting system, by way of both contacting terminals, is embedded in the upper adhesive layer.

32 . The drive battery according to claim 27 , wherein
one degassing opening is formed in each battery cell in a side which faces the support layer.

33 . The drive battery according to claim 32 , wherein
a clearance is provided in the support layer in each case in a region of the degassing openings of the battery cells, and adjacent clearances are connected to one another by degassing ducts.

34 . The drive battery according to claim 27 , wherein
the support layer is formed from a foamed plastics material.

35 . The drive battery according to claim 27 , wherein
the cover wall is configured as a heat exchanger for temperature control of the battery cell layer.

36 . The drive battery according to claim 27 , wherein
the support layer is configured as a heat exchanger for temperature control of the battery cell layer.

37 . The drive battery according to claim 27 , wherein
heat-exchange devices are provided between the battery cells, or heat-exchange devices are provided on shell faces of the battery cells, respectively.

38 . The drive battery according to claim 27 , wherein
the cover wall and the base wall are connected to one another by a flange connection, and form a fluid-tight drive battery housing.

39 . The drive battery according to claim 27 , wherein
the base wall is provided on an inside thereof with a heat-protection layer.

40 . The drive battery according to claim 27 , wherein
the base wall and/or the cover wall are provided on an inside thereof with an electrical insulation layer.

41 . The drive battery according to claim 27 , wherein
the base wall and/or the cover wall are formed from aluminum or from an aluminum alloy or a steel material or a fiber-reinforced plastics material.

42 . The drive battery according to claim 27 , wherein
the drive battery is configured to be assembled on a floor pan of a body of the motor vehicle, wherein the floor pan has a left longitudinal member and a right longitudinal member, and the drive battery, or the drive battery housing, is assembled on the floor pan from below, respectively, wherein the cover wall at least in portions forms a base of the floor pan.

43 . A motor vehicle, comprising:
a body; and a drive battery according to claim 27 .

44 . The motor vehicle according to claim 43 , wherein
the body has a floor pan having a left longitudinal member and a right longitudinal member, and the drive battery is assembled on the floor pan from below, wherein the assembled drive battery at least in portions forms a base of the floor pan.

45 . The motor vehicle according to claim 44 , wherein
the drive battery and the floor pan form in an interacting manner a fluid-tight base of a passenger cabin of the motor vehicle, wherein a fluid-tightness of the passenger cabin is established only by an interaction between the drive battery and the floor pan.

46 . The motor vehicle according to claim 44 , wherein
the drive battery is embodied and connected to the floor pan in such a manner that the drive battery increases a body stiffness for a driving operation of the motor vehicle and the drive battery increases a body strength for a load arising in an event of a collision of the motor vehicle.

47 . A method for producing a drive battery for a motor vehicle, the method comprising the steps of:
disposing a cover wall of a battery housing or a battery cell contacting system, and a battery cell layer, on top of one another; filling intermediate spaces between individual layers and battery cells of the battery cell layer with a liquid foam precursor product; and foaming, by way of reaction of the liquid foam precursor product after the filling procedure, so as to form a foamed material which adhesively bonds the cover wall, or the battery cell contacting system, and the battery cell layer to one another.

48 . The method according to claim 47 , wherein,
in the step of disposing, a support layer is additionally disposed, or after the step of foaming, the support layer is adhesively bonded to the battery cell layer.

49 . The method according to claim 48 , wherein,
in the step of disposing, a base wall of the battery housing is additionally disposed, or after the step of foaming, the base wall is adhesively bonded to the support layer.

50 . A method for producing a drive battery for a motor vehicle, the method comprising the steps of:
disposing a base wall of a battery housing, a support layer, a battery cell layer, and optionally a battery cell contacting system, on top of one another; filling intermediate spaces between individual layers and battery cells of the battery cell layer with a liquid foam precursor product, in a form of a bi-component mixture or a multi-component mixture; foaming, by way of reaction of the foam precursor product after the step of filling, so as to form a foamed material which adhesively bonds the base wall, the support layer, optionally the battery cell contacting system, and the battery cell layer to one another.

51 . The method according to claim 50 , wherein,
in the step of disposing, a cover wall is additionally disposed, or after the step of foaming, the cover wall is adhesively bonded to the support layer.

52 . The method according to claim 50 , wherein during the step of foaming, participating layers are mutually compressed or braced.

53 . The method according to claim 47 , wherein during the step of foaming, participating layers are mutually compressed or braced.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Harsch Thomas
• Karges Christian
• Krohmer Alexander

Classifications

• H01M50/213

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• B60L50/64 Primary

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• B60Y2306/01

  Reducing damages in case of crash, e.g. by improving battery protection · CPC title