WO2020078814A1 - Module de résistance et procédé de fabrication d'un module de résistance, et capteur de batterie - Google Patents

Module de résistance et procédé de fabrication d'un module de résistance, et capteur de batterie Download PDF

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Publication number
WO2020078814A1
WO2020078814A1 PCT/EP2019/077440 EP2019077440W WO2020078814A1 WO 2020078814 A1 WO2020078814 A1 WO 2020078814A1 EP 2019077440 W EP2019077440 W EP 2019077440W WO 2020078814 A1 WO2020078814 A1 WO 2020078814A1
Authority
WO
WIPO (PCT)
Prior art keywords
line section
resistance element
joining surface
line
resistance
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
Application number
PCT/EP2019/077440
Other languages
German (de)
English (en)
Inventor
Henryk Frenzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aumovio Germany GmbH
Original Assignee
Continental Automotive Technologies GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Publication of WO2020078814A1 publication Critical patent/WO2020078814A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R3/00—Apparatus or processes specially adapted for the manufacture or maintenance of measuring instruments, e.g. of probe tips
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/364—Battery terminal connectors with integrated measuring arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts

Definitions

  • the invention relates to a resistance module for a battery sensor, in particular for a vehicle battery, with two line sections and a resistance element arranged between the line sections, the line sections each being electrically conductively connected to a contact surface of the resistance element with a wing surface.
  • the invention further relates to a method for producing such a resistor assembly.
  • the invention relates to a battery sensor with such a resistance assembly
  • Battery sensors are used in vehicles to record battery parameters of the vehicle battery in order to be able to make statements about the state of charge and / or the state of health of the battery.
  • the battery parameters to be recorded are, for example, the battery voltage, the battery current and the temperature of the battery.
  • the battery voltage and the battery current ideally have to be permanently recorded in order, for example, to be able to make an exact statement about the state of charge of the battery.
  • the battery sensor is usually arranged on one of the battery poles and has, for example, a battery pole terminal for contacting the vehicle battery. Furthermore, the battery sensor has a cable connection for a cable, for example a ground cable.
  • a resistance element arranged in the current path of the load current is provided to detect the battery current.
  • the resistance element is electrically conductively connected to two line sections, which are formed by the battery terminal and the cable connection, so that the entire load current flows through the resistance element.
  • the line sections and the resistance element together form one Resistor assembly.
  • a voltage detection device is provided for detecting a voltage drop dropping across the resistance element. If the electrical resistance of the resistance element is known, the current flowing across the resistance element, that is to say the battery sensor, can be calculated from Ohm's law from the detected voltage drop across the resistance element.
  • the battery sensor Due to the installation situation in a vehicle, in particular in a Polish of a vehicle battery, the battery sensor has to be very compact. In addition, high demands are placed on the battery sensor in terms of mechanical stability. In normal vehicle operation, there are strong mechanical loads, such as shocks or vibrations. Large forces, which are also transmitted to the battery sensor, can act in particular on the ground cable. The battery sensor must ensure a secure electrical connection of the cable of the vehicle battery connected to the cable connection in the event of all loads occurring in the vehicle. Up to now, additional stiffening elements have often been used to increase the stability of the battery sensor. However, additional work steps are required during assembly.
  • the object of the invention is to provide a resistance module for a battery sensor and a battery sensor which are simple to manufacture and have sufficient mechanical stability for the loads occurring in vehicle operation.
  • the object of the invention is further to provide a method for producing such a resistor assembly.
  • a resistor assembly for a battery sensor in particular for a vehicle battery, has two line sections and a resistance element arranged between the line sections, the line sections each being electrically conductively connected to a contact surface of the resistance element with a wing surface, at least a line section at least on one to the Joining area adjacent area has increased strength, in particular increased bending rigidity.
  • the area of the line sections from which the battery pole terminal or a cable connection is formed must be flexible, for example in order to produce the battery pole terminal from the line section by means of a bending process.
  • a certain flexibility of the battery pole clamp is required in order to be able to clamp it to the battery pole.
  • the line sections should have a high strength, in particular a high bending stiffness, in order to be able to absorb the loads acting on the battery sensor. In the present case, this is achieved by increasing the strength in this area. This means that additional stiffening elements can be dispensed with.
  • the thickness of the line section can be increased at least in the area adjacent to the joining surface.
  • the line sections are made of a material with a constant thickness. This has manufacturing reasons.
  • the line sections and the resistance element are connected to one another in a continuous joining process, for example an electron beam process, the same welding parameters always being used. Different materials, on the other hand, require different welding parameters that were not possible with the previously used processes.
  • a single welding method is used to solve the task, in which the welding parameters (energy, pressure, time, etc.) can be individually adapted to the respective welded connection.
  • the thickness of the material can therefore be matched to the desired material property of the line section in this area.
  • the material can be thinner, so that this is more flexible and can be processed more easily, in particular deformed.
  • the material is thicker, so that it can absorb higher loads without being deformed or damaged.
  • the line section in the area adjacent to the joining surface consists of a material with increased strength, in particular with increased bending stiffness. That is, the material thickness can remain the same while increasing the strength of the material so that the desired strength of the material is achieved.
  • the line section in a region adjacent to the joining surface can have a material with a different chemical composition than the rest of the line section, in particular a different alloy.
  • the material composition, in particular the alloy is selected so that it has the desired properties.
  • different copper alloys can be used, so that a very good electrical conductivity of the entire line section is always ensured.
  • a CuFeO.I P alloy can be used for the area of the line section with increased strength and a CUFE2P alloy for the remaining line section.
  • the line section can consist of the same material throughout and the strength of the material of the line section in the area adjacent to the joining surface has been increased by a post-treatment, in particular by a heat treatment or a roller treatment.
  • a post-treatment in particular by a heat treatment or a roller treatment.
  • This enables a simpler production of the line section, since it consists of the same material throughout and can be shaped, for example punched out or cut out, from the same.
  • the area of the line section in which a higher strength is desired is then subjected to an aftertreatment which increases the strength.
  • at least one contact surface extends at an angle of 30 ° to 60 °, in particular at an angle of 45 °, to the longitudinal axis of the resistance element.
  • At least one joining surface can also run at an angle of 30 ° to 60 °, in particular at an angle of 45 °, to the longitudinal axis of the line section.
  • the joining surfaces and the contact surfaces are preferably designed such that the longitudinal axis of at least one line section and the longitudinal axis of the resistance element are angled relative to one another, in particular enclose an angle of at least 45 °, in particular 90 °.
  • a very compact resistor assembly can thus be provided.
  • the line sections are angled relative to one another, in particular at an angle of 90 °.
  • a battery sensor is also provided with a resistance module as described above and with a detection device for detecting a voltage drop across the resistance element.
  • a method for producing a battery sensor according to one of the preceding claims is also provided, with the following steps:
  • the individual welding process allows the welding parameters to be individually adapted to the material properties of the area of the line section adjoining the wing surface.
  • the strength of an area adjacent to the joining surface can be increased on at least one line section by a post-treatment.
  • Figure 2 shows the resistor assembly according to the invention for one
  • Figure 3a shows a detailed view of a second embodiment of a
  • Figure 3b shows a detailed view of a third embodiment of a
  • Resistor assembly and Figure 4 shows a fourth embodiment of a resistor assembly.
  • FIG. 1 shows a battery sensor 10 for recording battery parameters.
  • the battery sensor 10 has a first line section 12, which has a battery pole terminal 14, and a second line section 16, which has a cable connection 18 for a cable, for example a ground cable.
  • the line sections 12, 16 are electrically connected to one another via a resistance element 20.
  • Resistor element 20 together form a resistor assembly 22 shown in detail in FIG. 2.
  • the resistance element 20 is in each case electrically conductively connected to a joining surface 26a, 26b of the line sections 12, 16 with a contact surface 24a, 24b.
  • the battery sensor has a housing 28 which encloses the resistance element 20 and at least in sections the line sections 12, 16.
  • An evaluation unit (not shown in detail here) for evaluating the battery values detected with the battery sensor 10 is provided in the housing 28.
  • the evaluation unit comprises, for example, a voltage detection device for detecting a voltage drop across the resistance element 20.
  • the voltage detection device is contacted with contact points 33a, 33b in front of and behind the resistance element 20.
  • the electrical resistance of the resistance element 20 is known.
  • the current flowing via the resistance element 20, that is to say the battery sensor 10, can be determined from the known electrical resistance of the resistance element 20 and the detected voltage drop.
  • the resistance element 20 can consist of a material with low temperature dependence, for example one
  • the evaluation unit can determine a correction value for the electrical resistance in order to correct a change in the electrical resistance, for example due to aging phenomena or temperature changes.
  • the longitudinal axis 32 of the first line section 12 runs parallel to the longitudinal axis 34 of the resistance element 20.
  • the longitudinal axis 36 of the second line section 16 runs perpendicular to the longitudinal axis 34 of the resistance element 20.
  • the right-angled arrangement of the resistance element 20 and the second line section 16 results in an inside corner 38 on the battery sensor. If tensile forces 40 act on the cable that is connected to the second line section 16, this inside corner is heavily loaded, in particular by notch stresses.
  • Resistor assemblies 22 or battery sensors 10 are therefore known from the prior art, which have an additional reinforcing element that connects the resistance element 20 to at least one of the line sections 12, 16 and supports them. At least part of the force acting on the second line section 16 is thus dissipated via the reinforcing element.
  • the reinforcing element must be connected to the line section 12, 16 and / or the resistance element 20, which requires additional work steps.
  • the second line section 16 has an increased strength, in particular an increased bending stiffness, in an area 30 adjoining the joining surface 26b.
  • the increased strength of the area 30 is achieved in that the area 30 is made of a material that has an increased strength compared to the rest of the line section 16.
  • the area 30 consists of the same material as the rest of the line section 16.
  • the increased strength was achieved by post-treatment of the material. This can be, for example, a heat treatment or a roll treatment.
  • the line section 16 is therefore also made in one piece from one material, only the area 30 of the line section 16 being post-treated in such a way that it has increased strength compared to the rest of the line section 16.
  • the region 30 can also consist, for example, of a material with a different chemical composition than the rest of the line section, in particular of a different alloy.
  • the chemical composition or the alloy can be chosen arbitrarily in order to achieve the desired strength, in particular the desired bending stiffness.
  • the chemical composition is only to be selected in such a way that a good mechanical and electrical connection with the resistance element 20 is possible.
  • the area 30 is connected in advance to the rest of the line section 16 and then connected to the resistance element 20.
  • different copper alloys for example CuFeO.I P and CuFe2P, are used for the line section 16 and the region 30.
  • materials with different R values can be used, for example with an R value of R300 and R420.
  • FIGS. 3a and 3b A further possibility for increasing the strength of the area 30 is shown in FIGS. 3a and 3b.
  • the line section 16 is made of one material throughout.
  • the thickness of the material in the area 30 is increased in comparison with the other line section 16.
  • the bending stiffness is significantly higher.
  • the thickness increases starting from the joining surface 26b, so that the joining surface has the same dimensions as the corresponding contact surface 24b.
  • the area 30 has a constant thickness that is greater than that of the rest of the line section 16 and the resistance element 20.
  • the line section 16 and the resistance element 20 have a constant thickness.
  • the line sections and the resistance element were connected to one another in a continuous joining process, for example an electron beam process, always using the same welding parameters.
  • Different materials on the other hand, require different welding parameters that were not possible with the previously used processes.
  • the resistance element 20 To connect the resistance element 20 to one another, a single welding process is therefore used, in which the welding parameters (energy, pressure, time, etc.) can be individually adapted to the respective weld connection.
  • the welding parameters energy, pressure, time, etc.
  • the longitudinal axis 32 of the first line section 12 runs parallel to the longitudinal axis 34 of the resistance element 20.
  • the longitudinal axis 36 of the second line section 16 runs perpendicular to the longitudinal axis 34 of the resistance element 20.
  • the longitudinal axis 34 of the resistance element 20 is angled both to the longitudinal axis 32 of the first line section 12 and to the longitudinal axis 36 of the second line section 16 (FIG. 4).
  • the angle 42 between the The longitudinal axis 32 of the first line section 12 and the longitudinal axis 34 of the resistance element 20 is approximately 145 ° in the embodiment shown here.
  • the angle 44 between the longitudinal axis 36 of the second line section 16 and the longitudinal axis 34 of the resistance element 20 is approximately 125 ° in the embodiment shown here
  • the angle between the second line section 16 and the resistance element 20 makes the inner corner 38 significantly less strong, so that there are significantly lower tensions, in particular notch tensions, on the inner corner 38 due to tensile forces 40 which act on the second line section 16.
  • the current distribution over the cross section of the resistance element 20 is substantially more homogeneous due to the smaller angle between the second line section 16 and the resistance element 20, so that local heating of the resistance element 20 and the second line section turns out to be significantly less or can even be avoided entirely.
  • the angle by which the longitudinal axis 34 of the resistance element 20 is angled to the longitudinal axis 32, 36 of the line sections 12, 16 is between 30 ° and 60 °, preferably approximately 45 °.
  • the contact surfaces 24a, 24b are parallel to one another, so that the current path across the resistance element 20 is essentially of the same amount over the entire cross section of the resistance element 20.
  • the joining surfaces 26a, 26b are each inclined to the longitudinal axis 32, 36 of the line section 12, 16. The bending of the longitudinal axes 32, 36 of the line sections 12, 16 is thus achieved by the inclined joining surfaces 26a, 26b.
  • the joining surfaces 26a, 26b are preferably inclined at an angle 42, 44 of 30 ° to 60 °, in particular at an angle of approximately 45 °.
  • the angle between the longitudinal axes 32, 36 of the line sections 12, 16 is preferably 90 °, so that the battery sensor 10 described above can be used instead of the battery sensor 10 ′ described in FIGS. 1 and 2 without changing the installation situation on the vehicle battery, in particular the installation situation in a vehicle.
  • an area 30 can also be provided on the first line section 12, in which the strength of the material of the line section 12 is increased.
  • the line section 12, in particular the battery pole terminal 14 is usually produced in a bending process, for example a stamping and bending process, and must therefore be made of a material with a low bending stiffness. It is therefore not possible to consistently become the first line section 12 from a material that has a high degree of flexural strength. With the measures described above, it is possible to produce the first line section 12 from a material that enables the battery pole terminal 14 to be easily formed, but nevertheless provides a high stability of the resistance assembly 22 and thus of the battery sensor ten.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un module de résistance (22) destiné à un capteur de batterie (10), en particulier à une batterie de véhicule, comportant deux parties de circuit (12, 16) et un élément de résistance agencé entre les parties de circuit, les parties de circuit (12, 16) étant chacune reliées de manière électroconductrice à une surface de contact (24a, 24b) de l'élément de résistance (20) par une surface d'assemblage (26a, 26b). Au moins une partie de circuit (12, 16) présente, au moins dans une zone (30) adjacente à la surface d'assemblage (26a, 26b), une résistance plus élevée, en particulier une résistance plus élevée à la flexion. L'invention concerne par ailleurs un capteur de batterie (10) muni d'un tel module de résistance (22), ainsi qu'un procédé de fabrication d'un tel module de résistance (22).
PCT/EP2019/077440 2018-10-15 2019-10-10 Module de résistance et procédé de fabrication d'un module de résistance, et capteur de batterie Ceased WO2020078814A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018217614 2018-10-15
DE102018217614.0 2018-10-15

Publications (1)

Publication Number Publication Date
WO2020078814A1 true WO2020078814A1 (fr) 2020-04-23

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PCT/EP2019/077440 Ceased WO2020078814A1 (fr) 2018-10-15 2019-10-10 Module de résistance et procédé de fabrication d'un module de résistance, et capteur de batterie

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DE (1) DE102019215502A1 (fr)
WO (1) WO2020078814A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021210583A1 (de) 2021-09-23 2023-03-23 Continental Automotive Technologies GmbH Widerstandselement für einen Batteriesensor, Batteriesensor und Verfahren zur Herstellung eines Widerstandselements

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005039587A1 (de) * 2005-08-19 2007-02-22 Robert Bosch Gmbh Batteriesensoreinheit
DE102006019497A1 (de) * 2006-04-26 2007-10-31 Siemens Ag Sensorvorrichtung für eine Starterbatterie in einem Kraftfahrzeug
EP2197075A1 (fr) * 2008-12-10 2010-06-16 Robert Bosch GmbH Agencement de borne polaire
DE102010031113A1 (de) * 2010-07-08 2012-01-12 Robert Bosch Gmbh Messanordnung für eine Batteriemessklemme, Batteriemessklemme und Verfahren zur Herstellung einer Messanordnung für eine Batteriemessklemme
DE102012211701A1 (de) * 2011-09-16 2013-03-21 Robert Bosch Gmbh Messwiderstand für Stromsensor und Stromsensoreinheit
KR20160101251A (ko) * 2015-02-16 2016-08-25 강민정 자동차 배터리 전류센서용 션트 및 그 제조방법
DE102015218796A1 (de) * 2015-07-10 2017-01-12 Continental Automotive Gmbh Batteriesensoreinheit mit integriertem Widerstandselement
US20180180681A1 (en) * 2015-07-01 2018-06-28 Furukawa Electric Co., Ltd. Battery state sensing device and manufacturing method therefor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005039587A1 (de) * 2005-08-19 2007-02-22 Robert Bosch Gmbh Batteriesensoreinheit
DE102006019497A1 (de) * 2006-04-26 2007-10-31 Siemens Ag Sensorvorrichtung für eine Starterbatterie in einem Kraftfahrzeug
EP2197075A1 (fr) * 2008-12-10 2010-06-16 Robert Bosch GmbH Agencement de borne polaire
DE102010031113A1 (de) * 2010-07-08 2012-01-12 Robert Bosch Gmbh Messanordnung für eine Batteriemessklemme, Batteriemessklemme und Verfahren zur Herstellung einer Messanordnung für eine Batteriemessklemme
DE102012211701A1 (de) * 2011-09-16 2013-03-21 Robert Bosch Gmbh Messwiderstand für Stromsensor und Stromsensoreinheit
KR20160101251A (ko) * 2015-02-16 2016-08-25 강민정 자동차 배터리 전류센서용 션트 및 그 제조방법
US20180180681A1 (en) * 2015-07-01 2018-06-28 Furukawa Electric Co., Ltd. Battery state sensing device and manufacturing method therefor
DE102015218796A1 (de) * 2015-07-10 2017-01-12 Continental Automotive Gmbh Batteriesensoreinheit mit integriertem Widerstandselement

Also Published As

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