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CN-114502402-B - Electric power supply assembly for a motor vehicle

CN114502402BCN 114502402 BCN114502402 BCN 114502402BCN-114502402-B

Abstract

An electrical power supply assembly (10 ';10 ") comprising a housing (12 '; 12") having a bottom (14 ', 14 ") and at least two side walls (20 ',22', 20",22 "), a collection of battery modules (30 ',32', 30",31,32 "), each of these modules comprising a battery (34 ', 34") having two opposite ends (36 ',38', 36", 38") and two opposite flanges (40 ',42', 40", 42") covering said ends, these modules being mounted on said bottom in the form of a plurality of rows (24 ',26',28', 24",26",28 ") of (I) modules arranged substantially in line with each other. The rows are arranged such that the flanges (40 ',42',50'; 50', 40', 42') are aligned edge to edge and the aligned flanges are connected to the bottom of the housing so as to form a rigid cross member inside the housing.

Inventors

  • B. ALSAC
  • C. G. gaussier
  • L Herrich
  • M. Lalabetti jaregi
  • S. Rudier

Assignees

  • 雷诺股份公司

Dates

Publication Date
20260512
Application Date
20200904
Priority Date
20190910

Claims (10)

  1. 1. An electric power supply assembly (10 ';10' ') for a motor vehicle, the electric power supply assembly comprising: -a housing (12 ';12 ") having a bottom (14 '; 14") and at least two side walls (20 ',22';20 ", 22") opposite each other and projecting upright from the bottom (14 ';14 "). -A collection of battery modules (30 ',32';30 ", 31, 32"), each of the modules in the collection having a battery (34 ';34 ") with two opposite ends (36', 38'; 36", 38 ") and two opposite flanges (40', 42'; 40", 42 ") covering the ends, respectively, the modules (30', 32'; 30", 31,32 ") in the collection being mounted inside the casing (12'; 12") in the form of a plurality of consecutive rows (24 ',26',28';24 ", 26", 28 ") made up of n modules, coaxially located in an extension of each other and substantially parallel to the side walls (20', 22'; 20", 22 ") on the bottom (14'; 14"). Characterized in that the successive rows (24 ',26',28';24 ", 26", 28 ") are arranged such that the flanges (40 ',42',50; 50", 40 ", 42") of the modules of the rows are aligned edge to edge, respectively, in a direction substantially perpendicular to the opposite side walls (20 ',22';20 ", 22"); And the aligned flanges (40 ',42',50;50'',40'',42 '') are fixed to the bottom (14 ';14' ') of the housing (12'; 12 '') so as to form a rigid cross member inside the housing.
  2. 2. The power supply assembly according to claim 1, wherein the modules (30 ',32';30 ", 31, 32") of each of the rows (24 ',26',28';24 ", 26", 28 ") are connected together in pairs by only a single flange.
  3. 3. The power supply assembly according to claim 1 or 2, wherein the modules (30 ',32';30 ", 31, 32") in the set have only a single length.
  4. 4. The power supply assembly according to claim 1 or 2, wherein the housing (12 ';12 ") has a front wall (16 '; 16") and an opposite rear wall (18 ';18 ") projecting upright from the bottom (14 '; 14") and connecting the side walls (20 ',22';20 ", 22") substantially perpendicularly, respectively, so as to enclose the housing (12 ';12 ").
  5. 5. The power supply assembly according to claim 1, wherein each of the flanges has a given thickness and at least one through-going aperture (60, 62;60'' ',62' '') is made in the thickness so as to allow a fastening screw (64, 66;64'' ',66' '') to pass through.
  6. 6. The power supply assembly of claim 5, wherein the bottom (14 ") of the housing has a threaded portion (68, 70) for receiving a screw (64, 66) for tightening the flange.
  7. 7. The power supply assembly of claim 5 or 6, wherein the bottom (14 ' ") of the housing comprises a threaded collar (68 '", 70' ") for receiving the fastening screw (64 '", 66' ").
  8. 8. The power supply assembly according to claim 7, characterized in that the flange has a recess (80, 82) in the continuation of the through aperture (60 '' ',62' '') so as to be able to accommodate the collar (68 '' ',70' '').
  9. 9. The power supply assembly according to claim 1 or 2, wherein each of the flanges (40 ',42',50;40 ", 42", 50' ") has a substantially rectangular parallelepiped shape.
  10. 10. The power supply assembly according to claim 1 or 2, wherein each of the flanges (40 ',42',50;40 ", 42", 50' ") is integrally formed from an aluminum alloy.

Description

Electric power supply assembly for a motor vehicle Technical Field The present invention relates to an electric power supply assembly for a motor vehicle. Background In particular, one application area envisaged is an electric vehicle or even a hybrid vehicle, the electric power supply assembly of which is onboard. Therefore, the electric power supply assembly of the hybrid vehicle is generally mounted under the trunk of the vehicle. The power supply assembly includes a housing having a bottom and four walls opposing each other in pairs and upstanding from the bottom, two side walls, a rear wall and a front wall. The power supply assembly also includes a battery module assembly mounted inside the housing. Each of the modules in the set has a battery pack with two opposite ends and two opposite flanges covering the two ends, respectively. For example, these batteries are prismatic lithium batteries mounted in series between two flanges. The collective modules are mounted inside the housing in a plurality of consecutive rows of n modules on the bottom. The n modules are coaxially located in the extension of each other and substantially parallel to the side walls. Moreover, the modules are electrically coupled in series. The housing equipped with the collection of modules must provide resistance to deformation and must pass an impact test or "crash test". Thus, to do this, reinforcing cross members are mounted across the housing between the modules and perpendicular to the side walls. These reinforcing cross members then extend from one side wall to the other to mechanically connect the side walls and make the housing more rigid. However, the installation of these reinforcing cross members is disadvantageous in terms of reserving space for the battery module and thus in terms of the amount of electrical energy that can be stored. It is therefore envisaged to mount the reinforcing element outside the casing, but always without being beneficial to reserve space for the battery. Reference may be made to CN 101209659A, which describes such stiffening elements. Disclosure of Invention Accordingly, one problem that arises and is addressed by the present invention is to provide an electrical power supply assembly for a motor vehicle that provides good resistance to deformation without affecting the energy that can be stored and the ease of integration in the vehicle, and without unduly increasing the weight and volume of the interior and exterior of the housing. In order to solve this problem, an electric power supply assembly for a motor vehicle is proposed, comprising a housing having a bottom and at least two side walls opposite to each other and projecting upright from said bottom, and a collection of battery modules, each of which has a battery with two opposite ends and two opposite flanges respectively covering said ends, the modules of the collection being mounted inside said housing in a plurality of consecutive rows of n modules on said bottom, coaxially located in an extension of each other and substantially parallel to said side walls. The successive rows being arranged such that the flanges of the modules of the rows are aligned edge to edge in a direction substantially perpendicular to the opposed side walls, respectively, and the aligned flanges are secured to the bottom of the housing so as to form a rigid cross member inside the housing. It is therefore a feature of the present invention that the particular arrangement of the rows of modules allows the flanges to be assembled edge to edge and also aligned in a direction perpendicular to the side walls and additionally allows the flanges to be secured to the bottom of the housing. In other words, the structure of the module itself is utilized to form a cross member with the flange, which then allows the housing to be more rigid. In fact, since the flanges are assembled edge-to-edge in a direction perpendicular to the side walls and are additionally fixed to the bottom of the casing, these flanges constitute rigid elements capable of withstanding compression (as will be explained in more detail in the rest of the present description). In this way, no auxiliary cross members need to be installed, and therefore, the housing is reserved only for the installation of the battery modules, and is still rigid so as to be able to resist deformation and pass the crash test. According to a particularly advantageous embodiment of the invention, the modules of each of the rows are connected together in pairs by means of a single flange only. In this way, for each of these rows, two battery packs are connected by a single flange, and therefore, a greater number of batteries are accommodated with respect to a given row length (where the modules each have two flanges). Moreover, the modules in the set of modules advantageously have only a single length. In this way, all flanges of the module may be aligned edge-to-edge inside the housing and may thus constitute reinfo