WO2024256767A1 - Vehicule comprenant une boite a fusibles sous caisse a acces facilite - Google Patents
Vehicule comprenant une boite a fusibles sous caisse a acces facilite Download PDFInfo
- Publication number
- WO2024256767A1 WO2024256767A1 PCT/FR2024/050658 FR2024050658W WO2024256767A1 WO 2024256767 A1 WO2024256767 A1 WO 2024256767A1 FR 2024050658 W FR2024050658 W FR 2024050658W WO 2024256767 A1 WO2024256767 A1 WO 2024256767A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuse box
- cover
- box
- fuse
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0238—Electrical distribution centers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
Definitions
- the invention relates to a vehicle, in particular electric or hybrid, comprising a fuse box.
- vehicle may be a 100% electric vehicle (i.e. without a thermal engine) or a hybrid vehicle, for example a plug-in hybrid vehicle.
- an electrical energy storage battery is arranged, more concisely called an ‘electric battery’ or even a ‘battery’.
- This type of battery has a fairly high voltage at its terminals, in practice greater than 100 volts, most often between 200 volts and 600 volts. Voltages greater than 600 volts are also not excluded.
- VLV very low voltage
- the voltage referred to by the term ‘high voltage’ is defined as a voltage greater than 50 volts.
- a fuse box is generally provided in the part of the electrical network which supplies equipment connected to high voltage.
- the fuse box is functionally interposed between the battery and certain equipment directly using high voltage.
- the inventors sought to facilitate and streamline maintenance operations involving the fuse box.
- the invention proposes a motor vehicle comprising a main floor, at least one electrical energy storage battery arranged under the main floor, a battery pack crossmember delimiting the battery pack and a fuse box mounted on the battery pack crossmember, the fuse box comprising at least one box body and a cover together delimiting an interior volume of the fuse box, with at least one joint plane, at the location of which the cover meets the box body, the joint plane having a normal direction, perpendicular to said joint plane, the fuse box comprising at least fuses, arranged in the interior volume, the cover and the fuses being screwed by means of screws having respective screw axes, said motor vehicle having a reference in space comprising a longitudinal axis following a direction of movement of said motor vehicle, a lateral axis perpendicular to the longitudinal axis, and a vertical axis perpendicular to the longitudinal axis and to the lateral axis, the vertical axis being directed from bottom to top, and conversely, directed from top to bottom
- cover of the fuse box opens in a direction inclined downwards, and optionally towards the rear, in the spatial reference of the vehicle.
- the fuse box is directly accessible from underneath the vehicle.
- the vehicle can be lifted using a garage lift or, for example, a maintenance operator can slide in under the vehicle or use a garage pit to access the fuse box area.
- the cover can be unscrewed using conventional tools, including for example electrician's screwdrivers whose shank is protected by a dielectric sheath.
- a free space available of at least 10 cm from the joint plane in the axis of each cover screw or fuse, is at least 12 cm, measured from the joint plane.
- the free space available in the axis of certain cover screws and/or certain fuses is at least 15 cm, measured from the joint plane.
- the free space available in front of the cover allows said cover to be removed without removing any other part of the vehicle (except for a possible underbody cover).
- the free space available provides access to the interior of the fuse box without removing the fuse box from its support. An operator can pass a hand through to reach the inside of the box.
- the free space available in front of the face axes allows a screwdriver to be used in line or only slightly off-axis to screw/unscrew the screw fasteners of the cover as well as for the screw fasteners of the fuses.
- the cross member is a rear cross member of a battery block.
- the fuse box is therefore located in this case at the rear of the main battery pack and the cover opens rearwards and downwards. Under these conditions, possible projections of gravel or other objects related to driving do not directly reach the cover of the fuse box. It is noted that a low wing of the crossmember can protect the body of the fuse box from below at least in part.
- the fuse box is interposed between the battery block and a fuel tank of the vehicle.
- a fuel tank is made of plastic molding.
- the shape of the tank may include, and this only opposite the fuse box, a recessed area intended to leave a desired free space available in front of the cover.
- the normal direction makes an angle with the downward vertical of between 55 degrees and 60 degrees.
- this angular range represents an optimum for access and intervention in the box without dismantling it while occupying the smallest possible space along the longitudinal direction X.
- this spatial configuration is compact in the longitudinal direction, while providing the necessary access to avoid having to dismantle the box body of the fuse box.
- the fuse box may have a general parallelepiped shape with a length denoted L1, a width denoted L2 and a height denoted H, the sum L1 + L2 + H being less than 50 cm, and preferably less than 40 cm.
- the fuse box comprises an arming connector, with a coupling direction parallel to the normal direction W0. Access to disconnect the counterpart of this connector, necessary prior action to be able to disassemble the cover, is also made possible by the orientation of the fuse box and the free space in front of the cover at this location.
- the arming connector is located in an upper portion of the fuse box arrangement in position in the vehicle.
- the arming connector is thus protected from possible direct mechanical attacks such as projections of stones or gravel.
- the cover is of flat shape. It is an easy part to manufacture, assembly and disassembly are simple and intuitive.
- the connections at the ends of the conductors are screw connections and the fuse box is devoid of connectors.
- the reliability of such an electrical distribution system is particularly high.
- the space required by the fuse box is generally much smaller than the space required in the prior art.
- the weight of the proposed assembly is less than the weight observed with a fuse box equipped with connectors.
- the fuse box comprises a box body back and fixing lugs made from the same material as the box body, each fixing lug comprising a flat with at least one hole, the flat being inclined relative to a box body back.
- the back of the box body is parallel to the lid, in the case of a conventional box shape.
- the inclination between the plane of the flats and the back of the box body is an angle 80, 80 being the 90° complement of 00, 00 being the angle between the normal direction of the joint plane relative to the downward vertical. 80 can be between 30 degrees and 35 degrees.
- a peripheral seal for closing the lid may be provided, the seal being compressed between the lid and the box body when the box is closed normally.
- the peripheral seal may be an elastomer seal.
- a sealing device is provided at the location of each wall crossing by the conductor(s), to ensure sealing not only at the level of the cover but also at the level of each of the conductor passages through the wall.
- the sealing device is of the stuffing box type and comprises an O-ring. This is an effective solution for achieving sealing around a cable passing through a wall. More specifically, the sealing device may comprise an O-ring arranged around the conductor and compressed by one or more pressurizing element(s).
- all the wall feedthroughs are arranged on the same face of the box body.
- all the high-voltage conductor inputs/outputs are on the same side of the fuse box.
- all the high-voltage inputs/outputs are directed upwards; they are away from the lower part of the fuse box which can be subject to a ricocheting impact of gravel.
- the conductors are housed in a concave and narrow space and they are well protected from the external environment.
- the fuse box can be fixed on a specific support providing the desired inclination.
- the fuse box can remain geometrically as simple as possible and the specific support is an ad-hoc part comprising the means of the inclined fixing.
- the box body and the cover are made of aluminum.
- the fuse box comprises at least one positive bus bar, one negative bus bar and fuses.
- the fuse box comprises a protective mask covering the bus bars and the fuses to provide selective and small access intended for a test probe of an electrical measuring device.
- This configuration makes it possible to protect vehicle maintenance operators who may have to open the fuse box to replace a fuse or check the presence or absence of voltage on the positive primary conductor or on one of the positive conductors.
- the protective mask prevents an operator or even an end customer from directly touching live elements with their fingers.
- FIG.1 is a schematic representation in side view of a motor vehicle with an electric energy storage battery and a fuse box, in accordance with the present invention
- FIG.2 is a schematic top view representation of a motor vehicle with an electric energy storage battery and a fuse box, in accordance with the present invention
- FIG.3 is a schematic representation in longitudinal section of a portion of the vehicle in which the fuse box is located;
- FIG.4 is a perspective view from below of a portion of the vehicle in which the fuse box is located;
- FIG.5 shows a top view, cover removed, of the fuse box according to the present invention
- FIG.6 is a view similar to Figure 3, illustrating the operations of removing the cover and the arming connector
- FIG.7 is a view similar to Figure 3, illustrating manual operations interacting with the interior volume of the fuse box
- FIG.8 is an exploded perspective schematic representation of an exemplary fuse box further illustrating an interior protective mask
- FIG.9 is a partial sectional view illustrating an example of a cover locking device at the location of a so-called arming connector
- FIG.10 illustrates an alternative embodiment without screws in the upper part of the cover.
- the motor vehicle 9 considered here may be a 100% electric vehicle (i.e. without an internal combustion engine) or a hybrid vehicle, for example a plug-in hybrid vehicle. Such a vehicle is illustrated in Figures 1 and 2.
- the motor vehicle 9 has a reference frame in space comprising a longitudinal axis X along a direction of movement of said motor vehicle, a lateral axis Y perpendicular to the longitudinal axis X, and a vertical axis Z perpendicular to the longitudinal axis X and to the lateral axis Y, the axis vertical being directed from bottom to top (notation Z+, the vertical descending downwards being noted Z-).
- the axis of the front axle is marked YF
- the axis of the rear axle is marked YR.
- the vehicle comprises a fuse box 1 at the heart of the present invention, this fuse box is in the illustrated example located in the vicinity of the rear axle in the longitudinal direction, a little in front of YR, and in the middle part in the lateral direction Y.
- the electric or hybrid vehicle 9 comprises a battery 2 whose function is to store electrical energy.
- This type of battery has a storage capacity of between 20 kWh and 150 kWh.
- the storage capacity is most often between 50 kWh and 120 kWh, which represents considerable energy.
- the battery 2 occupies a significant surface area under the floor of the vehicle as illustrated in FIG. 2.
- This type of battery has a fairly high voltage at its terminals, in practice greater than 100 volts, most often between 200 volts and 600 volts. A voltage greater than 600 volts is also not excluded.
- FIG 3 the battery 2 is shown schematically, the region illustrated is that of the rear end of the battery block. It can be seen immediately that the fuse box is neither in a vertical nor a horizontal position, it is in an inclined position as will be seen in detail below.
- the respective positive and negative terminals of the battery are electrically connected to a primary junction box, not shown in the figures.
- the primary junction box is integrated into the battery pack and provides in particular general protection and forms the distribution head.
- the primary junction box includes in particular a general isolation relay which interrupts the supply of voltage to the downstream equipment including the fuse box 1 of interest discussed below.
- the fuse box 1 is electrically arranged downstream of the primary junction box and is supplied via two primary conductors 71 which enter the fuse box 1 (see Figure 5).
- the cross-section of the primary conductors is typically between 15 mm 2 and 30 mm 2 .
- the fuse box 1 comprises at least one box body 14 and a cover 15 together delimiting an interior volume of the fuse box.
- the cover 15 is assembled on the box body 14 by means of screws 7.
- the fuse box 1 comprises a positive bus bar 30 and a negative bus bar 40, arranged in the interior volume.
- Each bus bar is a rigid conductive part, for example a plate, in particular a metal plate or otherwise called a strip, obtained by cutting from a blank with a thickness of between 2 mm and 5 mm.
- the fuse box 1 comprises four fuses, marked respectively F1, F2, F3 and F4, but the number of fuses could be different.
- the positive primary conductor connects the positive pole of the battery (via the primary junction box) to the positive bus bar 30 by passing through a wall of the box body
- the negative primary conductor connects the negative pole of the battery (via the primary junction box) to the negative bus bar 40 by passing through a wall of the box body.
- the proposed arrangement comprises four pairs of output conductors 72, which extend from the interior volume to an exterior area of the fuse box through a wall of the box body.
- Each pair of conductors comprises a negative conductor connected to the negative bus bar and a positive conductor supplied by one of the fuses.
- the cross-section of the output conductors is between 8 mm 2 and 16 mm 2 .
- connections at the ends of the conductors are screwed connections.
- a bolt/nut pair can be used, or a welded nut and a screw that engages in this welded nut, or a welded threaded stud on which a nut is engaged by screwing it.
- the primary conductors are screwed directly onto each of the bus bars respectively.
- the fuse F1 is connected by a screw connection 81 to the positive bus bar.
- the other end of the fuse is connected by a bolted connection 82 to the terminal of the first positive conductor 11.
- a cover locking system is provided using a so-called arming connector (this function is also called a cover ‘interlock’), which has the general function of interrupting the power supply serving the fuse box as soon as said cover 15 is removed from the box.
- the female part 19 is provided as an electrical connector with a female part 19 and a male part 18 permanently on the housing body.
- it is a two-pin connector whose male part consists of a shunt.
- the female part carries two conductors 68 functionally connected to a controller (not shown in the figures) which controls a power switch; e.g. an isolation relay, in the primary junction box.
- a power switch e.g. an isolation relay
- the body of the female connector 19 has a size greater than the dimension of the hole 35 through which the male connector 18 passes.
- this connector 19 must first be disconnected before the cover can be removed.
- the female plug of the connector belonging to the harness must be physically disconnected so that the cover 15 which surrounds the male plug 18 can be substantially separated from the box body.
- the coupling axis of the female plug 19 on the male connector 18, marked Wa is parallel to the axis W0, which will be discussed below.
- the location at which the cover 15 meets the box body 14 defines a joint plane denoted PJ.
- the joint plane PJ has a normal direction denoted W0. Therefore W0 is perpendicular to the joint plane PJ.
- the back 14d of the box body extends in a UV plane, U being a direction parallel to the length and V being a direction parallel to the width as illustrated in Figure 5.
- the fuse box 1 has a generally parallelepiped shape with a length noted L1, a width noted L2 and a height noted H, the sum L1 + L2 + H being less than 50 cm, and preferably less than 40 cm.
- the length L1 can be between 15 cm and 40 cm.
- the width L2 can be between 5 cm and 12 cm.
- the height H can be between 5 cm and 10 cm.
- the cover 15 is of flat shape. It may be a cut and drilled plate.
- the box body and the cover are preferably made of aluminum.
- the normal direction W0 is oriented downward.
- the normal direction W0 makes an angle with the downward vertical, denoted 00. 00 is between 30 degrees and 70 degrees.
- 00 is between 55 degrees and 60 degrees. According to a particular non-limiting embodiment, 00 is chosen at 57 degrees.
- the cover 15 is screwed by means of nine fixing screws 7, but of course this number could be different.
- a maintenance operator can use a test probe 93 to contact a downstream portion of a fuse in order to measure the voltage, i.e. absence or presence of voltage at this location.
- a maintenance operator can pass his hand UH into the free space and grasp an element inside the fuse box, e.g. a fuse to remove it or to install a new one.
- an element inside the fuse box e.g. a fuse to remove it or to install a new one.
- the battery is delimited towards the rear by a cross member 4 called the rear cross member of the battery block, this cross member can also be called a spar.
- This cross member can be part of a frame forming the armature framing the battery block.
- This crosspiece is formed as a profile with in section: a vertical core 40, an upper flange 41, and lower flanges 43, 44.
- the fuse box is fixed to the crosspiece 4, by fixing lugs 24.
- the fixing lugs 24, 24a may be integral with the box body, as illustrated in FIGS. 5 and 8.
- Each fixing lug includes a flat with one or two holes.
- a fixing lug is provided at each end of the box body along the length direction U.
- the fuse box is fixed directly to the rear cross member 4 of the battery.
- a specific support part 23 can be provided, or the fixing lugs can be one or two specific parts allowing the desired inclined position to be achieved.
- the fuse box 1 is interposed between the battery pack 2 and a fuel tank 80 of the vehicle.
- a particular shape of the tank may be provided to provide the desired available space at the rear of the fuse box cover.
- peripheral seal 12 for closing the cover.
- the peripheral seal 12 extends continuously around the periphery of the box body.
- the peripheral seal 12 is for example made of elastomeric polymer. The seal is compressed between the cover 15 and the box body 14 when the box is closed normally.
- the upper part of the cover may be devoid of fixing screws.
- a system for embedding fingers 95 in ears 96 is provided.
- two fingers 95 are provided, each inserted respectively in an ear 96 by complementarity of shape, which forms a pseudo hinge zone, of axis A6.
- This principle involves a rotation of the cover both for its closing and for its opening relative to the hinge area which includes the fingers and the ears. As a result, there are no screws to be screwed or unscrewed on the upper edge 15a of the cover and the available space to be provided can be somewhat reduced in the upper part of the assembly. In the example illustrated, there are five screws 7 which make it possible to pressurize the seal. The closing movement of the cover also makes it possible to pressurize the seal at the hinge area.
- the fuse box 1 may include a protective mask 17 covering the bus bars and the fuses to provide selective and small access intended for a test probe of an electrical measuring device.
- the mask 17 covers the entire front surface of the case above the fuses, except at the location of certain holes 170 with a diameter of between 4 and 6 millimeters. These holes 170 allow access to the screw heads with a touch probe but do not allow a finger to pass through.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Fuses (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24732738.0A EP4727807A1 (fr) | 2023-06-16 | 2024-05-22 | Vehicule comprenant une boite a fusibles sous caisse a acces facilite |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2306153A FR3149840B1 (fr) | 2023-06-16 | 2023-06-16 | Vehicule comprenant une boite a fusibles sous caisse a acces facilite |
| FRFR2306153 | 2023-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024256767A1 true WO2024256767A1 (fr) | 2024-12-19 |
Family
ID=88207054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2024/050658 Ceased WO2024256767A1 (fr) | 2023-06-16 | 2024-05-22 | Vehicule comprenant une boite a fusibles sous caisse a acces facilite |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4727807A1 (fr) |
| FR (1) | FR3149840B1 (fr) |
| WO (1) | WO2024256767A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2306153A1 (fr) | 1975-03-31 | 1976-10-29 | Nave Forges Ateliers | Chariot pour la manutention des bobines |
| CN102555755A (zh) * | 2010-12-28 | 2012-07-11 | 铃木株式会社 | 电动车辆 |
| US20190081296A1 (en) * | 2017-09-14 | 2019-03-14 | Honda Motor Co., Ltd. | Battery unit |
| EP3888963A1 (fr) * | 2020-03-31 | 2021-10-06 | Mazda Motor Corporation | Structure inférieure d'un véhicule et procédé pour loger une batterie dans un véhicule |
-
2023
- 2023-06-16 FR FR2306153A patent/FR3149840B1/fr active Active
-
2024
- 2024-05-22 EP EP24732738.0A patent/EP4727807A1/fr active Pending
- 2024-05-22 WO PCT/FR2024/050658 patent/WO2024256767A1/fr not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2306153A1 (fr) | 1975-03-31 | 1976-10-29 | Nave Forges Ateliers | Chariot pour la manutention des bobines |
| CN102555755A (zh) * | 2010-12-28 | 2012-07-11 | 铃木株式会社 | 电动车辆 |
| US20190081296A1 (en) * | 2017-09-14 | 2019-03-14 | Honda Motor Co., Ltd. | Battery unit |
| EP3888963A1 (fr) * | 2020-03-31 | 2021-10-06 | Mazda Motor Corporation | Structure inférieure d'un véhicule et procédé pour loger une batterie dans un véhicule |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3149840A1 (fr) | 2024-12-20 |
| FR3149840B1 (fr) | 2025-05-02 |
| EP4727807A1 (fr) | 2026-04-22 |
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