EP3682491A1 - Systeme de fixation d'une barre omnibus de vehicule automobile - Google Patents
Systeme de fixation d'une barre omnibus de vehicule automobileInfo
- Publication number
- EP3682491A1 EP3682491A1 EP18752603.3A EP18752603A EP3682491A1 EP 3682491 A1 EP3682491 A1 EP 3682491A1 EP 18752603 A EP18752603 A EP 18752603A EP 3682491 A1 EP3682491 A1 EP 3682491A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective cover
- bus bar
- screw
- fixing
- head
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the invention relates to a fastening system of a motor vehicle bus bar. More particularly, the invention intends to propose a solution for fixing but also to protect and electrically isolate a particular type of motor vehicle electrical cable which carries a high voltage (> 450 Volts), hence specific risks, these electric cables being known. at present under the name of bus bar or bus bar.
- An electric vehicle such as an electric car or a hybrid car comprises a battery pack comprising a plurality of battery cells.
- the battery pack therefore comprises a plurality of battery cells in which the positive and negative electrodes are arranged adjacent each other, and the positive and negative electrodes of two adjacent battery cells are coupled to each other. other via a bus bar.
- a battery pack is constituted by the connection in series of all the battery cells, so that a high output voltage can be delivered (> 450 volts).
- a bus bar for battery pack is conventionally in the form of a rigid bar which is formed by a conductor, for example copper, coated with insulation over its entire length.
- a bus bar has at its two ends a pair of two orifices in which the electrodes, negative and positive, of two batteries are introduced.
- the bus bars are optimally positioned in the battery environment (narrow areas, winding passages, etc.).
- a plurality of bus bars are often held together by a non-conductive support.
- the carrier has a plurality of insulating protective covers which are each attached to the end of a bus bar. Such a protective cover conventionally prevents any physical contact of a portion (its ends) of the bus bar.
- EP 1872421 which describes a housing or connection support for bus bars, or bus bar, comprising an insulating protective cover.
- patent EP 2688122 which describes a wiring module comprising bus bars or bus bars, comprising insulating elements having one or both of the connection holes having an oblong shape.
- the protective covers must also carry fixing screws able to maintain and secure a close connection between the battery electrodes and the bus bar. These fixing screws must imperatively remain in position once screwed, first to ensure a good electrical connection between the electrodes and the bus bar but also to avoid creating short circuits by contacting other conductive elements, thus deteriorating irreparably battery pack, including creating arcs.
- the present invention intends to propose a simple and economical solution for securing definitively the position of these fastening screws once these last screwed, ensuring on the one hand the fixing of the bus bar to the electrodes and on the other hand the anchoring of a protective cover at the busbar.
- the present invention proposes a system for fixing a bus bar of a motor vehicle, comprising a bus bar, an electrically insulating protective cover of the bus bar at least partially covering said bar and at least one screw of fixing, comprising a body and a screw head, for fixing between said bar and a power supply, the bus bar and the protective cover having an orifice for the passage respectively of the screw body and the screw head , characterized in that the width of the orifice of the protective cover is at most equal to the diameter of the screw head.
- An advantage of the present invention is that it does not use any additional parts so that this solution is both economical and simple (without adding weight to the vehicle).
- hood also makes it possible not to lose the fastening screw in case of unwanted unscrewing during the use of the vehicle.
- the width of the orifice of the protective cover is less than the diameter of the screw head by at most one millimeter.
- the width of the orifice of the protective cover is at least 0.1 mm smaller than the diameter of the screw head.
- the orifice of the protective cover has a section of oblong shape, the length of the orifice being greater than its width.
- This advantageous characteristic of the invention therefore makes it possible to reduce the diversity of tooling parts used and thus to reduce tooling costs. In addition, this solution saves time during assembly.
- the length of the opening of the protective cover is at least equal to 1.5 times its width.
- the protective cover is made of plastic.
- the protective cover has, at its orifice for the passage of the screw head, a projecting portion extending along the longitudinal axis of the fastening screw, of a length at least equal to twice the length of the thickness of the screw head.
- the screw head is encased in this protruding portion of the protective cover, in a kind of cylinder (having a section of oblong shape), particularly preventing it from coming into contact with or near other electrically conductive elements of the vehicle.
- the protective cover covers, over the entire length of said cover, the bus bar and the body of the fixing screw.
- the present invention intends to overcome a disadvantage of the prior art.
- the protective covers of the state of the art do not cover the entire end of the bus bar on which they are attached.
- an accidental contact between the unprotected end of the bus bar and the body can occur, creating arcing that can lead to an aggravated short circuit.
- These arcs can cause serious injury to the operator (burns) and damage the part, rendering it unusable (removal of insulating material).
- the system for fixing a bus bar of a motor vehicle according to the invention comprises a plurality of fixing screws and as many orifices respectively of the bus bar and the protective cover.
- each protective cover of a bus bar must embark two fixing screws, since each end of a bus bar is attached to two battery electrodes.
- the present invention also proposes a motor vehicle, characterized in that it comprises at least one system for fixing a bus bar as briefly described above.
- FIG. 1 is a schematic top view of a bus bar on the end of which a protective cover according to the state of the art is attached;
- FIG. 2 is a schematic bottom view of the bus bar and the protective cover according to the state of the art shown in Figure 1;
- FIG. 3 is a schematic representation of a conventional bus bar
- FIG. 4 is a sectional view illustrating an embodiment of a protective cover according to the invention and a bus bar on which are fixed two fixing screws;
- FIG. 5 is a schematic top view of a protective cover according to the invention and a bus bar on which are fixed two fastening screws;
- FIG. 6 is a sectional view illustrating an alternative embodiment of a protective cover according to the invention and a bus bar on which are fixed two fastening screws
- - Figure 7 is a sectional view illustrating another alternative embodiment of a protective cover according to the invention and a bus bar on which are fixed two fixing screws.
- FIGS. 1 and 2 show, seen from above and from below, a bus bar 1 on which is fixed a protective cover 2 according to the prior art, the connection zone 3 of these two elements 1, 2 not being protected against electrically conductive contacts.
- the power supply source mentioned above consists of a battery, not shown in the accompanying figures.
- This battery conventionally comprises two electrodes, one positive and the other negative, which are each respectively inserted into one of the two holes 1 1, 12 present at the two ends of a bus bar 1 (see FIG. ), a fixing screw then being screwed to maintain an electrically conductive contact between the bus bar and each of the electrodes. That is why it is so important to maintain and secure the position of use (screwed) of the fixing screw.
- the primary object of the present invention is to keep the fixing screw in its position of use so that it becomes captive.
- the invention is not limited to a system necessarily using two fastening screws even if at present a source of electrical energy of a motor vehicle consists of a battery having two electrodes and therefore requiring two fixing screws .
- the problems of short circuits and arcs arise only when the two electrodes are connected, via an electrically conductive circuit (conductive materials such as fixing screws).
- FIG. 4 shows an embodiment of the protective cover 4 according to the invention.
- two fixing screws 5 traditionally the number of screws required for the attachment of a bus bar 1.
- the fixing screws 5 extend along a longitudinal axis XX 'determined by the axis of the body 6 of screws 5.
- the protective cover 4 covers here only partially the end of the bus bar 1 and does not cover the bodies 6 of screws 5. At the openings for the passage of the heads 7 of screws 5, the protective cover 4 has a protruding portion 8 or protruding substantially cylindrical enclosing the screw head 7 5.
- This portion 8 extends from the inner surface of the cover 4 , in contact with the bus bar 1, along the axis XX 'of the screw bodies 6.
- the height of this portion 8 is more than twice the thickness of the screw heads 7. 5. More specifically, in this embodiment, the height of this portion 8 is nearly three times greater than the thickness of the heads 7 fixing screw 5.
- the height of this portion 8 may vary but is preferably always greater than twice the thickness of a screw head to prevent contact of the screw head with another electrically conductive element.
- the openings of the cover 4 for the passage of the screw heads 5, as well as the aforesaid portion 8, have, in a horizontal section (plane perpendicular to the axis XX 'of the fastening screws 5), a section of oblong shape.
- the openings of the cover 4 have a length, along the axis ⁇ , greater than its width, along the axis ZZ '.
- the length of the openings of the cover 4 for the passage of the screw heads 7 have a length at least 1, 5 times greater than its width, the latter being equal (or lower) to the diameter of a screw head 5.
- the length of such a hole of the protective cover 4 (for the passage of the screw heads 5) can be up to twice its width.
- the present invention provides that the fixing screw 5 must not move throughout the cycle of use, so the invention proposes that the width of the opening of the protective cover 4 is at most equal to the diameter of the head 7 screw 5.
- this width of the opening of the cover of protection 4 is less, at most one millimeter (mm) and at least 0.1 mm, to the diameter of the screw head 7 5.
- the fastening screw 5 can fully perform its function, during the anchoring of the protective cover 4 to the bus bar 1, that is to say that the fixing screw 5 must be able to be fully screwed so that the fixing of the bus bar 1 to the two electrodes is optimal.
- the friction and friction of the head 7 of screws 5 against the walls of the hole of the cover 4 should not be too large to impede the screwing but these mechanical means (clamping / friction) must be sufficient to ensure the retention of the fixing screw 5 (via its head 7) once it screwed.
- the protective cover 4 consists of a plastic material, advantageously flexible.
- This advantageously flexible plastic material may consist of a thermoplastic or a thermosetting material.
- This thermoplastic may consist of a polyolefin, for example a polyethylene (low or high density) or PVC, a polystyrenic, for example a high impact polystyrene, a cellulose acetate, or a polyimide.
- a polyolefin for example a polyethylene (low or high density) or PVC
- a polystyrenic for example a high impact polystyrene
- a cellulose acetate or a polyimide.
- the protective cover 4 may also consist of a thermosetting material, in particular a silicone (of the family of polyoranololsiloxanes).
- the protective cover 4 comprises a protective cap 9 to fulfill an identical function (electrical insulation and protection) with the screw bodies 6.
- this cap 9 extends, besides along the surface of the bodies 6 of screws 5, on all the surfaces of the end of the busbar 1 not covered by the hood. protection 4.
- this cap 9 is in the form of two individual sleeves 10 each respectively covering a body 6 of screws 5.
- this cap 9 or 10 is formed of an insulating material identical to or different from that of the protective cap 4.
- the cap 9 or 10 is connected or not to the protective cover 4.
- the protective cover 4 includes, by connection, the cap 9 or 10
- a particularly flexible material is advantageously chosen to form this or these elements 4, 9 or 10 so that the establishment of the assembly on the bus bar 1 is easy for an operator.
- the cap 9 or 10 is not connected to the protective cover 4.
- the cap 9 or 10 consists of a separate element of the protective cover 4, the latter 9 or 10 is advantageously removable so that it can be removed once the assembly of the bus bars on the batteries made by an operator.
- Such a protective cover 4, 9 or 10 according to the invention on the one hand to prevent any risk of electric arcs can damage the battery of the vehicle as hurting staff during assembly / assembly and on the other hand effectively protect against oxidation at the contacts, this especially if no coating is used (tin, nickel, etc.) to obtain a cost saving.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1758494A FR3071108B1 (fr) | 2017-09-13 | 2017-09-13 | Systeme de fixation d’une barre omnibus de vehicule automobile |
| PCT/FR2018/051953 WO2019053345A1 (fr) | 2017-09-13 | 2018-07-30 | Systeme de fixation d'une barre omnibus de vehicule automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3682491A1 true EP3682491A1 (fr) | 2020-07-22 |
Family
ID=60302306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18752603.3A Withdrawn EP3682491A1 (fr) | 2017-09-13 | 2018-07-30 | Systeme de fixation d'une barre omnibus de vehicule automobile |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3682491A1 (fr) |
| CN (1) | CN111095606A (fr) |
| FR (1) | FR3071108B1 (fr) |
| MA (1) | MA50228A (fr) |
| WO (1) | WO2019053345A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054453B (zh) * | 2020-09-02 | 2022-06-07 | 中电科能源有限公司 | 一种汇流条安装结构及其使用方法 |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1533493A (fr) * | 1967-06-26 | 1968-07-19 | Siemens Ag | Jonction d'une barre collectrice enrobée de matière isolante pour postes de distribution électrique avec au moins un conducteur dérivant de cette barre |
| FR2462793A1 (fr) * | 1979-08-03 | 1981-02-13 | Legrand Sa | Appareillage electrique a vis imperdable |
| US5829935A (en) * | 1997-05-12 | 1998-11-03 | The United States Of America As Represented By The Secretary Of The Army | Fastening arrangement |
| US6848758B1 (en) * | 2003-10-31 | 2005-02-01 | Chih-Cheng Yeh | Do it yourself (DIY) modular cabinet |
| JP2006147319A (ja) * | 2004-11-18 | 2006-06-08 | Sanyo Electric Co Ltd | 電源装置 |
| JP5070695B2 (ja) * | 2005-01-18 | 2012-11-14 | 日産自動車株式会社 | 組電池および保護カバー |
| KR100868255B1 (ko) | 2005-04-19 | 2008-11-11 | 주식회사 엘지화학 | 단자 연결장치 |
| FR2885983B1 (fr) * | 2005-05-19 | 2015-07-24 | Valeo Equip Electr Moteur | Etancheite par deformation de matiere |
| KR100754056B1 (ko) * | 2005-11-21 | 2007-08-31 | 대구텍 주식회사 | 절삭공구 |
| US20070122252A1 (en) * | 2005-11-28 | 2007-05-31 | Bosacco Stephen A | Fastener for sheet material |
| DE102006034463B3 (de) * | 2006-07-26 | 2008-01-10 | A. Raymond Et Cie | Vorrichtung zum Befestigen eines Anbauteiles und eines Trägerteiles in einem Abstand voneinander |
| DE102007058051B3 (de) * | 2007-11-30 | 2009-08-20 | Phoenix Contact Gmbh & Co. Kg | Anordnung zur Schraubensicherung von elektrischen Anschlussklemmen |
| DE102009060373A1 (de) * | 2009-12-24 | 2011-06-30 | Schneider Electric Industries Sas | Elektrische Klemmvorrichtung |
| JP5668555B2 (ja) * | 2011-03-18 | 2015-02-12 | 株式会社オートネットワーク技術研究所 | 電池モジュール |
| US9472797B2 (en) * | 2011-05-25 | 2016-10-18 | Samsung Sdi Co., Ltd. | Battery pack |
| DE102012018086A1 (de) * | 2012-09-13 | 2014-03-13 | Daimler Ag | Stromschienenanordnung |
| JP2014082010A (ja) * | 2012-10-12 | 2014-05-08 | Minebea Co Ltd | 照明装置および取付孔 |
| JP6264720B2 (ja) * | 2012-12-04 | 2018-01-24 | 株式会社Gsユアサ | 蓄電装置 |
| CN205303606U (zh) * | 2016-01-05 | 2016-06-08 | 江苏正昀新能源技术股份有限公司 | 一种新型锂电池模组的连接固定结构 |
| CN206003876U (zh) * | 2016-09-12 | 2017-03-08 | 广东电网有限责任公司中山供电局 | 蓄电池连接条 |
| KR101731393B1 (ko) * | 2016-11-02 | 2017-04-28 | 주식회사 서울디핑 | 버스바용 절연보호커버 |
-
2017
- 2017-09-13 FR FR1758494A patent/FR3071108B1/fr active Active
-
2018
- 2018-07-30 EP EP18752603.3A patent/EP3682491A1/fr not_active Withdrawn
- 2018-07-30 MA MA050228A patent/MA50228A/fr unknown
- 2018-07-30 CN CN201880059817.2A patent/CN111095606A/zh active Pending
- 2018-07-30 WO PCT/FR2018/051953 patent/WO2019053345A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019053345A1 (fr) | 2019-03-21 |
| FR3071108A1 (fr) | 2019-03-15 |
| CN111095606A (zh) | 2020-05-01 |
| MA50228A (fr) | 2020-07-22 |
| FR3071108B1 (fr) | 2019-08-30 |
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