Assembly and corresponding manufacturing process

Abstract

Assembly and corresponding manufacturing process. This assembly (2) comprises a primary electrochemical element (4), a rechargeable electrical element (6) electrically connected in parallel to the primary electrochemical element, and a holding element (14) for the primary electrochemical element and the rechargeable electrical element relative to each other. The holding element maintains the primary electrochemical element and the rechargeable electrical element relative to each other in a predefined spatial configuration. The holding element includes positioning surfaces defining the predefined spatial configuration. The positioning surfaces include first positioning surfaces (30), which are positioning surfaces for the primary electrochemical element, and second positioning surfaces (32), which are positioning surfaces for the rechargeable electrical element.The first and second positioning surfaces (30, 32) define the predefined spatial configuration in the presence and absence of contact between the primary electrochemical element and the rechargeable electrical element with these positioning surfaces. Figure for the abstract: 2.

Description

Title of the invention: Assembly and corresponding manufacturing process

[0001] The present invention relates to an assembly of the type comprising a primary electrochemical element, a rechargeable electrical element electrically connected in parallel to the primary electrochemical element, and an element for maintaining the primary electrochemical element and the rechargeable electrical element relative to each other.

[0002] Assemblies comprising a primary electrochemical element, such as a primary electrochemical cell, and a rechargeable electrical element that is electrically connected in parallel to the primary electrochemical element are known. These assemblies further comprise an element for holding the primary electrochemical element and the rechargeable electrical element relative to each other. This holding element is usually made of a flexible, self-adhesive and / or heat-shrinkable plastic tape.

[0003] These assemblies entail, among other things, the following disadvantages:

[0004] - The plastic ribbon, due to its flexibility, does not define in a way The relative positions of the primary electrochemical element and the rechargeable electrical element are certain. Therefore, when assembling two sets, the primary electrochemical element and the rechargeable electrical element may have different relative positions.

[0005] - The quantity of raw material used is relatively high for a capacity given maintenance, since the ribbon usually has to make more than one full turn around the primary electrochemical element and the rechargeable electrical element.

[0006] - Tape assembly is complicated and difficult to reproduce identically.

[0007] - Similarly, the position of electrical connection elements, such as wires The electrical relationship between the primary electrochemical element and the rechargeable electrical element is not defined.

[0008] - The assembly has a relatively limited lifespan, particularly due to the tendency of the rechargeable electrical element to age faster than the primary electrochemical element.

[0009] In particular for the Internet of Things (IoT) industry (in English In the context of "interactive electronics," there is a need for an assembly that can be easily integrated into an electrical device and is easy to handle. Other intended applications include smart meters and monitoring systems.

[0010] In addition, there is a need for the assembly to be able to provide electrical energy with a very high degree of autonomy and reliability under adverse environmental conditions, such as high humidity and temperature variations.

[0011] Assemblies are known by EP2328200A1, EP3079180A1, EP3193387A1, JP2006185751A, WO2015167084Al, and WO2016032106A1.

[0012] The invention aims to provide a reliable electricity supply system that can be economically integrated into a device, in particular of the "Internet of Things" type.

[0013] In general, the invention aims to overcome at least one of the above disadvantages, and this with economical means.

[0014] To this end, the invention relates to an assembly, as indicated above, characterized in that the retaining element maintains the primary electrochemical element and the rechargeable electrical element relative to each other in a predefined spatial configuration, and in that

[0015] The holding element comprises positioning surfaces defining the predefined spatial configuration, in that the positioning surfaces comprise first positioning surfaces (30), which are positioning surfaces of the primary electrochemical element, and second positioning surfaces (32), which are positioning surfaces of the rechargeable electrical element, and in that

[0016] the first and second positioning surfaces (30, 32) define the predefined spatial configuration in the presence and absence of contact of the primary electrochemical element and the rechargeable electrical element with these positioning surfaces.

[0017] According to particular embodiments of the assembly, it may comprise one or more of the following characteristics:

[0018] - the assembly includes a first central axis, which is a central axis of the element primary electrochemical, and the assembly includes a second central axis, which is a central axis of the rechargeable electrical element, and

[0019] the predefined spatial configuration includes on the one hand

[0020] either the first central axis is perpendicular to the second central axis,

[0021] either the first central axis is parallel to the second central axis,

[0022] either the first central axis is coaxial with the second central axis,

[0023] and / or on the other hand

[0024] either the rechargeable electrical element is axially centered on the first central axis

[0025] either the rechargeable electrical element is axially offset with respect to the first central axis,

[0026] either the rechargeable electrical element is axially aligned with respect to a front face of the primary electrochemical element,

[0027] either the rechargeable electrical element is axially centered with respect to the front faces of the primary electrochemical element;

[0028] - the retaining element is equipped

[0029] - of a first retaining portion adapted to hold the electro element primary chemical and including the initial positioning surfaces, and

[0030] - of a second retaining portion adapted to retain the electrical element chargeable and including the second positioning surfaces.

[0031] - on the one hand the first maintenance portion

[0032] is made all around the primary electrochemical element around the first central axis,

[0033] is either interrupted circumferentially around the first central axis,

[0034] is either an inner annular portion of a connecting plate and / or

[0035] on the other hand the second maintenance portion

[0036] is made all around the rechargeable electrical element around the second central axis

[0037] is interrupted circumferentially around the second central axis.

[0038] - either the first retaining portion extends along the entire length of the electro element primary chemical along the first central axis,

[0039] - either the primary electrochemical element extends axially beyond the first portion maintenance;

[0040] - the first retaining portion has a wall thickness greater than 0.200 mm, in particular greater than 0.300mm, and / or

[0041] the second retaining portion has a wall thickness greater than 0.200 mm, in particular greater than 0.300 mm, and / or

[0042] the retaining element is made of plastic, in particular non-heat shrinkable;

[0043] - the retaining element comprises a cap, provided with a peripheral wall and of an end wall,

[0044] and the first retaining portion comprises the peripheral wall;

[0045] - the second retaining portion comprises the end wall, and optionally the peripheral wall;

[0046] - the first retaining portion includes an axial stop;

[0047] - the second retaining portion includes positioning projections, and / or

[0048] the first maintenance portion includes

[0049] i.e., a peripheral wall extending from the connecting portion,

[0050] i.e. an inner annular portion;

[0051] - the retaining element includes a connecting portion which links the first portion maintenance and the second maintenance portion;

[0052] - the rechargeable electrical element is coated with a sealing material, including polymer resin;

[0053] - the sealing material has the physical property according to which the percentage maximum water absorption after 30 days according to method 1 of ISO 62:2008 3rd edition is less than or equal to 1.0% and preferably less than or equal to 0.2%.

[0054] The invention also relates to a method for manufacturing an assembly as defined above, characterized in that it comprises the following successive steps:

[0055] - to provide the primary electrochemical element,

[0056] - provide the rechargeable electrical element,

[0057] - provide the retaining element,

[0058] - electrically connect the rechargeable electrical element in parallel with the element primary electrochemical,

[0059] - apply the rechargeable electrical element to the second surfaces of position operation,

[0060] - apply the primary electrochemical element to the first posi surfaces operation,

[0061] - fix the rechargeable electrical element onto the retaining element, and

[0062] - fix the primary electrochemical element onto the retaining element.

[0063] The invention will be better understood upon reading the following description, given solely by way of example and made with reference to the accompanying drawings, in which:

[0064] [Fig-1] The [Fig. 1] shows, side view, a first embodiment of an assembly according to the invention;

[0065] [Fig.2] The [Fig.2] shows the whole of the [Fig.1] in perspective;

[0066] [Fig. 3] [Fig. 3] shows the entirety of Figures 1 and 2 in a section along a plane parallel to the plane of [Fig.1] and perpendicular to the cutting plane of [Fig.4];

[0067] [Fig.4] [Fig.4] is a cross-sectional view along line IV-IV of [Fig.1] the element primary electrochemical being shown schematically in dashed lines;

[0068] [Fig.5] The [Fig.5] is a perspective view of part of the retaining element of the set of Figures 1 to 4;

[0069] [Fig.6] The [Fig.6] is a plan view of a closing washer of the assembly of Figures 1 to 4;

[0070] [Fig.7] The [Fig.7] is a schematic median cross-sectional view of a second embodiment of an assembly according to the invention;

[0071] [Fig.8] Fig.8 is a schematic cross-sectional view along line VIII-VIII of the [Fig.7];

[0072] [Fig.9] The [Fig.9] is a schematic median section view of a third embodiment of an assembly according to the invention;

[0073] [Fig. 10] The [Fig. 10] is a schematic cross-sectional view along line XX of the [Fig.9];

[0074] [Fig. 11] The [Fig. 11] is a side view of a fourth embodiment of an assembly according to the invention during assembly, the rechargeable electrical element being represented in dashed lines;

[0075] [Fig. 12] The [Fig. 12] is a top view of a fifth embodiment of an assembly according to the invention, the assembly being in the assembled state;

[0076] [Fig. 13] The [Fig. 13] is a side view of the fifth embodiment of an assembly according to the invention, the assembly being in the assembled state;

[0077] [Fig. 14] The [Fig. 14] is a rear view of the fifth embodiment of an assembly according to the invention, the assembly being in the assembled state;

[0078] [Fig. 15] The [Fig. 15] is a top view of a sixth embodiment of an assembly according to the invention, omitting the primary electrical element and the rechargeable electrical element;

[0079] [Fig. 16] The [Fig. 16] is a front view of the sixth embodiment of an assembly according to the invention, omitting the primary electrical element and the rechargeable electrical element;

[0080] [Fig. 17] The [Fig. 17] is a side view of the sixth embodiment of an assembly according to the invention, the assembly being in the assembled state;

[0081] [Fig. 18] The [Fig. 18] is a front view of the sixth embodiment of an assembly according to the invention, the assembly being in the assembled state;

[0082] [Fig. 19] The [Fig. 19] is a schematic median cross-sectional view of a seventh embodiment of an assembly according to the invention;

[0083] [Fig.20] The [Fig.20] is a schematic cross-sectional view along line XX-XX of the [Fig.19] of the seventh embodiment of an assembly according to the invention;

[0084] [Fig. 21] Fig. 21 is a schematic median cross-sectional view of an eighth mode of manufacturing an assembly according to the invention; and

[0085] [Fig.22] The [Fig.22] is a schematic median sectional view of a ninth embodiment of an assembly according to the invention.

[0086] In what follows, unless otherwise indicated, the expressions "axial"; "radial"; "circumferentially" generally refer to the axis of the element concerned.

[0087] Figure 1 shows an assembly according to a first embodiment of the invention, designated by the general reference 2.

[0088] Assembly 2 is an electrochemical assembly that is adapted to supply electricity to an electrical device (not shown), such as an internet of objects. Set 2 is a module which can be manipulated autonomously, and whose constituent elements do not separate from each other, at least not under the effect of the force of gravity.

[0089] The set 2 comprises a primary electrochemical element 4 and a rechargeable electrical element 6 ([Fig.3]).

[0090] The rechargeable electrical element 6 is electrically connected in parallel to the primary electrochemical element 4.

[0091] Assembly 2 is provided with a power connection 8, in this case comprising two electrical wires 10 and a connector 12. The power connection 8 is electrically connected in parallel to the rechargeable electrical element 6 and serves to supply the electrical device (not shown) by assembly 2.

[0092] The assembly 2 also includes a holding element 14 of the primary electrochemical element 4 and the rechargeable electrical element 6 relative to each other.

[0093] The primary electrochemical element 4 is a non-rechargeable electrochemical element, also referred to as a "battery", in particular an element of the type Lithium Thionyl Chloride (Li-SOCl2), Lithium Manganese Dioxide (Li-MnO2), Li-SO2, Li-CFx, Li-SO2Cl2, or mixtures of these components.

[0094] The primary electrochemical element 4 in this case comprises a cylindrical peripheral surface 16 and two front faces 18, 20. The assembly 2 comprises a first central axis XX, which is a central axis of the primary electrochemical element 4, and which, in this case, is the central axis of the peripheral surface 16. The cylindrical peripheral surface 16 has in particular a circular cross-section.

[0095] The front faces 18, 20 are substantially flat and extend perpendicularly with respect to the first central axis XX. These front faces 18, 20 have a known shape of negative pole surface, respectively positive pole surface of an electrochemical element.

[0096] The primary electrochemical element 4 preferably has a shape corresponding essentially to that of a standard cell of the type AA, AAA, AAAA, C, D, 3LR12 / 3R12, or E.

[0097] The rechargeable electrical element 6 is, for example, a capacitor, a hybrid capacitor or a secondary electrochemical element, preferably of the Li-Ion type.

[0098] In the case of a capacitor or a hybrid capacitor, it has for example a capacitance between 8pF and 50 F, preferably between 10.0 mF and 30.0 mF, between 2.0 F and 4.0 F, between 18.0 F and 22.0 F or between 38.0F and 42.0F.

[0099] The capacitor may be a "supercapacitor" or an "electrochemical double layer capacitor" (in English, "Electrochemical Double Layer Capacitor"). (EDLC)"), or "ultracapacitor." This is a device that stores energy by accumulating ions on two electrodes that act as ion collectors when a potential difference is applied between them. Energy storage in a (super)capacitor is electrostatic in origin, not electrochemical as in the case of batteries. The hybrid capacitor can be a hybrid capacitor, with a positive electrode of the supercapacitor type based on activated carbon, and a negative electrode of the Li-Ion type with a sheet structure that inserts / disinserts lithium ions.

[0100] In the case where the rechargeable electrical element 6 is a secondary electrochemical element, it may be a rechargeable electrochemical element, preferably cylindrical, with a capacity between 0.1 Ah and 1 Ah.

[0101] The rechargeable electrical element 6 in this case comprises a cylindrical peripheral surface 22 and two front faces 24, 26. The assembly 2 includes a second central axis YY, which is a central axis of the rechargeable electrical element 6, and which, in this case, is the central axis of the peripheral surface 22. The cylindrical peripheral surface 22 advantageously has a circular cross-section.

[0102] The front faces 24, 26 of the rechargeable electrical element 6 are substantially flat and extend perpendicularly with respect to the second central axis YY. These front faces 24, 26 can have a known shape of negative pole surface respectively of positive pole of an electrical cell.

[0103] The rechargeable electrical element 6 preferably has a shape essentially corresponding to that of a capacitor, therefore with a cylindrical outer surface. The diameter of the cylinder can be inscribed within a diameter of 10 mm.

[0104] According to the invention, the retaining element 14 maintains the primary electrochemical element 4 and the rechargeable electrical element 6 relative to each other in a predefined spatial configuration. Even in the absence of the primary electrochemical element 4 and the rechargeable electrical element 6, the retaining element 14 is suitable for maintaining the primary electrochemical element 4 and the rechargeable electrical element 6 in the predefined spatial configuration.

[0105] The predefined spatial configuration is a determined position and a determined orientation of the primary electrochemical element 4 and the rechargeable electrical element 6 relative to each other.

[0106] In particular, the spatial configuration is definitely defined for a given primary electrochemical element 4 and a rechargeable electrical element 6 by the holding element 14, even in the unassembled state of the primary electrochemical element 4 and the rechargeable electrical element 6.

[0107] The retaining element 14 is a rigid element, that is to say, it does not visibly deform under its own weight. The retaining element 14 is made of any condition more rigid than self-adhesive or heat-shrinkable tapes.

[0108] The retaining element 14 includes positioning surfaces defining the predefined spatial configuration. The positioning surfaces include first positioning surfaces 30, which are positioning surfaces of the primary electrochemical element 4. The positioning surfaces also include second positioning surfaces 32, which are positioning surfaces of the rechargeable electrical element 6.

[0109] The first positioning surfaces 30 and the second positioning surfaces 32 define the predefined spatial configuration when the primary electrochemical element 4 is in contact with the first positioning surfaces 30 and when the rechargeable electrical element 6 is in contact with the second positioning surfaces 32. The first positioning surfaces 30 and the second positioning surfaces 32 also define the predefined spatial configuration when the primary electrochemical element 4 is not in contact with the first positioning surfaces 30 and when the rechargeable electrical element 6 is not in contact with the second positioning surfaces 32. This means that even before assembly, for a given primary electrochemical element 4 and a given rechargeable electrical element 6, the predefined spatial configuration is fixed by the retaining element 14.

[0110] Unlike a heat-shrinkable type tape of the prior art, which is flexible and does not pre-define any configuration, the retaining element 14 is sufficiently rigid to guarantee the spatial configuration of the primary electrochemical element 4 and the rechargeable electrical element 6.

[0111] As illustrated in [Fig.4], the predefined spatial configuration includes the first central axis XX being perpendicular to the second central axis YY.

[0112] Furthermore, in the present case, the rechargeable electrical element 6 is axially centered on the first central axis XX. The second central axis YY therefore intersects the first central axis XX. The axial length of the rechargeable electrical element 6 along the second axis YY is essentially identical on both sides of the first central axis XX.

[0113] The retaining element 14 is provided with a first retaining portion 34 adapted to retain the primary electrochemical element 4 and comprising the first positioning surfaces 30. The retaining element 14 is provided with a second retaining portion 36 adapted to retain the rechargeable electrical element 6 and comprising the second positioning surfaces 32.

[0114] A connecting portion 37 links the first holding portion 34 and the second holding portion 36. The connecting portion may be omitted or minimal, in the case where the first holding portion 34 and the second holding portion 36 are contiguous. In any case, the first support portion 34 and the second support portion 36 are fixed relative to each other.

[0115] The retaining element 14 comprises, in this case, a cap 38, having a peripheral wall 40 and an end wall 42. The cap 38 is, in this case, made of plastic, one-piece, and is, for example, manufactured by injection molding. Generally, the retaining element 14 is made of plastic, in particular non-heat-shrinkable.

[0116] The plastic material of the cap 38, more generally of the retaining element 14, can be thermoplastic material, such as Polyethylene, PE, PP, ABS, and PET.

[0117] In this case, the first retaining portion 34 comprises the peripheral wall 40, and the first positioning surfaces 30 comprise an inner surface of the peripheral wall. The first retaining portion 34 runs all the way around the primary electrochemical element 4 about the first central axis XX. The first retaining portion 34 has a wall thickness El greater than 0.200 mm, in particular greater than 0.300 mm.

[0118] The first retaining portion 34 defines the position of the primary electrochemical element 4 relative to the retaining element 14 in a radial direction relative to the first central axis XX.

[0119] The first retaining portion 34 also includes an axial stop 44 which defines the position of the primary electrochemical element 4 relative to the retaining element 14 in an axial direction relative to the first central axis XX.

[0120] The primary electrochemical element 4 extends axially beyond the first retaining portion 34 and therefore beyond the peripheral wall 40. The axial length of this extension is marked L1 in [Fig. 3]. Thus, indications on the surface of the primary electrochemical element 4 can be seen.

[0121] The peripheral wall 40 includes at least one, in this case two, reduced wall thickness sectors 46. These reduced wall thickness sectors 46 allow on the one hand the passage of the electrical wires 10 of the rechargeable electrical element 6 to the outside of the cap 38 and on the other hand the passage of a negative interconnection element 58 (see below).

[0122] The retaining element 14 comprises in this case a separation disc 50, which axially separates the primary electrochemical element 4 and the rechargeable electrical element 6. The separation disc 50 is a separate component of the cap 38. Alternatively, the retaining element 14 comprises, instead of the separation disc 50, a separating wall between the primary electrochemical element 4 and the rechargeable electrical element 6. The retaining element 14 may be a single piece or in several pieces.

[0123] The axial stop 44 is formed in this case by axial ribs or columns 52 of the cap 38, on which the separation disc 50 is applied. The primary electrochemical element 4 is applied axially to the separation disk 50.

[0124] In an alternative not shown, the separating disc 50 is omitted. In this case, the axial stop 44 is formed, for example, by projections of the cap 38, such as axial ribs 52, and the primary electrochemical element 4 is applied axially to the projections of the cap 38.

[0125] The separation disc 50 is shown in plan view in [Fig. 6]. The separation disc 50 is substantially flat and its periphery is essentially complementary to the inner surface of the cap 38. The separation disc 50 includes notches 54, which, in the assembled state of the separation disc 50 and the cap 38, are located opposite the sectors with reduced wall thickness 46.

[0126] The separation disc 50 is also provided with a central passage opening 56.

[0127] The material of the separation disc 50 is advantageously compatible with or identical to the material of the cap 38. The material of the separation disc 50 is, for example, also plastic.

[0128] Assembly 2 includes a negative interconnecting element 58 electrically connecting the negative terminal of the primary electrochemical element 4 to the negative terminal of the rechargeable electrical element 6. This negative interconnecting element 58 is, in this case, a conductive ribbon. Assembly 2 includes a positive interconnecting element 60 connecting the positive terminal of the primary electrochemical element 4 to the positive terminal of the rechargeable electrical element 6. This positive interconnecting element 60 is, in this case, a conductive ribbon.

[0129] The central opening 56 allows the passage of the positive interconnecting element 60.

[0130] The separation disc 50 includes a passage 62 for the two electrical wires 10, in the form of a through opening. The passage 62 is eccentric with respect to the central axis XX.

[0131] The second retaining portion 36 comprises the end wall 42 of the cap 38. The second retaining portion 36 has a wall thickness E2 greater than 0.200mm, in particular greater than 0.300mm.

[0132] The second retaining portion 36, in this case the end wall 42, includes positioning projections 68 which form the second positioning surfaces 32. The positioning projections 68 have, in cross-section, parallel to the central axis XX and perpendicular to the axis YY in the Figures, a shape flaring towards the rechargeable electrical element 6. In this case, this shape is substantially in the form of a truncated V.

[0133] In the assembled state of assembly 2, the peripheral surface 22 of the electrical element rechargeable 6 applies against positioning protrusions 68 and on second positioning surfaces 32.

[0134] The second retaining portion 36 thus defines the position of the rechargeable element 6 relative to the retaining element 14 in a radial direction relative to the second central axis YY.

[0135] In this case, the second retaining portion 36 also includes the peripheral wall 40, or alternatively a part of this peripheral wall 40. The peripheral wall 40 thus forms an axial positioning surface that defines the axial position of the rechargeable electrical element 6 along its central axis YY. This axial positioning surface is, for example, a contact surface between a peripheral end edge of the rechargeable electrical element 6 and a generatrix of the peripheral wall 40.

[0136] The rechargeable electrical element 6 is coated, in particular completely coated, with a sealing material 72. The sealing material 72 is a solidified paste or liquid and surrounds the rechargeable electrical element 6 in a watertight manner. The sealing material 72 is in particular made of a polymer resin or a solidified adhesive, such as polyurethane, polyacrylate, and their copolymers. The sealing material 72 advantageously fills the volume between the end wall 42 and the separating disc 50, and also advantageously fills small volumes and gaps.

[0137] The sealing material, during its application, has a viscosity of 4500 mPa·s or less, preferably 1500 mPa·s or less. This facilitates the introduction of the sealing material. After application, the sealing material hardens and becomes solid.

[0138] At the very least, the sealing material 72 extends in the cap 38 up to a level that completely covers the rechargeable electrical element 6, for example in the absence of a separation disc 50.

[0139] The sealing material 72, once implemented, advantageously has the following physical property: the maximum percentage of water absorption after 30 days according to method 1 of ISO 62:2008 3rd edition is less than or equal to 1.0% and preferably less than or equal to 0.2%.

[0140] The manufacture of assembly 2 comprises the following steps:

[0141] - The rechargeable electrical element 6 is placed in the cap 38 such that the peripheral surface 22 is in contact with the second positioning surfaces 32.

[0142] - Where appropriate, the rechargeable electric 6 is positioned in the cap 38 of such so that it is in contact with the axial positioning surface, therefore in this case the peripheral wall.

[0143] - Optionally, before installing the rechargeable electrical element 6 in the cap 38, glue is added to temporarily hold the rechargeable electrical element 6 in the cap 38.

[0144] - Next, the sealing material 72 is introduced in a non-solid state into the cap 38 until the rechargeable electrical element 6 is completely covered and the sealing material 72 is allowed to solidify.

[0145] - Then, if necessary, the separation disc 50 is added to the material of sealing 72.

[0146] - The primary electrochemical element 4 is connected to the interconnecting element 58 negative and to the interconnection element 60 positive.

[0147] - The primary electrochemical element 4 is introduced axially into the cap 38 until the primary electrochemical element 4 is applied against the separation disc 50, or in the absence of a separation disc 50 against the axial ribs 52.

[0148] Figures 7 and 8 show a second embodiment of an assembly according to the invention in a schematic median sectional view and a cross-sectional view. Only the differences compared to the previous embodiment will be described hereafter. Similar elements bear the same reference numerals.

[0149] The retaining element 14 comprises a stepped cap 38. The first retaining portion 34 comprises a first axial part 80 of a peripheral wall 40 having a first internal diameter DL. The second retaining portion 36 comprises a second axial part 82 of the peripheral wall 40 having a second internal diameter D2 which is greater than the first diameter DL. Between the two axial parts 80, 82 of the peripheral wall 40, the peripheral wall comprises an annular part 84.

[0150] The first positioning surfaces 30 include the inner surface of the first axial part 80. The axial position of the primary electrochemical element 4 is determined by axial stops not shown.

[0151] The second positioning surfaces 32 include the inner surface of the second axial part 82. Thus, the axial position of the rechargeable electrical element 6 is determined by the inner surface of the second axial part 82.

[0152] The second positioning surfaces 32 further comprise a front surface of the annular part 84. For this purpose, the rechargeable electrical element 6 is applied against the annular part 84. The annular part can also be provided with positioning projections, such as positioning projections 68 of the first embodiment.

[0153] The retaining element 14, in this case, does not include a separating disc 50. The sealing material 72 therefore encases the rechargeable electrical element 6 and the end of the primary electrochemical element 4.

[0154] In order for the assembly 2 to be assembled, the retaining element 14 can be in less two parts, for example the end wall 42 can be a separate component and form a cover.

[0155] Figures 9 and 10 show a third embodiment of an assembly according to the invention in a schematic median sectional view and a schematic axial sectional view along line XX. Hereafter, only the differences compared to the previous embodiment will be described. Similar elements bear the same reference numerals.

[0156] The retaining element 14 includes a non-stepped cap 38.

[0157] The predefined spatial configuration includes the first central axis XX being perpendicular to the second central axis YY, and the rechargeable electrical element 6 being axially offset with respect to the first central axis XX. Thus, a transverse plane of the rechargeable electrical element 6 extending midway between the axial ends of the rechargeable electrical element 6 is offset from the central axis XX of the primary electrochemical element 4. In this case, the rechargeable electrical element 6 is axially offset with respect to the first central axis XX such that the front face 24 of the rechargeable electrical element 6 is substantially aligned with the peripheral surface 16 of the primary electrochemical element 4.

[0158] The first retaining portion 34 comprises a first axial part 80 of a peripheral wall 40 having an internal diameter D. The second retaining portion 36 comprises a second axial part 82 of the peripheral wall 40 having an internal diameter which is identical to the diameter D. Between the two axial parts 80, 82 of the peripheral wall 40, the peripheral wall 40 therefore does not have an annular part and also has the internal diameter D.

[0159] The inner diameter D is greater than the diameter of the peripheral surface 16 of the primary electrochemical element 4. The peripheral wall 40 and the primary electrochemical element 4 therefore form a radial gap E with respect to the central axis XX.

[0160] The first retaining portion 34 extends along the entire length of the primary electrochemical element 4 along the first central axis XX. Thus, the primary electrochemical element 4 is entirely disposed within the peripheral wall 40 over the axial length L2.

[0161] The first positioning surfaces 30 include the inner surface of the first axial part 80. The axial position of the primary electrochemical element 4 is determined by axial stops not shown.

[0162] The second positioning surfaces 32 include the inner surface of the second axial part 82. Thus, the axial position of the rechargeable electrical element 6 is determined by the inner surface of the second axial part 82.

[0163] The second retaining portion 36 comprises the end wall 42 of the cap 38. The second positioning surfaces 32 comprise a front surface of the end wall 42 or projections not represented in a similar manner to the projections 68 of the first embodiment.

[0164] The retaining element 14, in this case, does not include a separating disc 50. The sealing material 72 encases the rechargeable electrical element 6, one end of the primary electrochemical element 4, and the primary electrochemical element 4 over substantially its entire axial height. The sealing material 72 therefore essentially occupies the entire space between, on the one hand, the primary electrochemical element 4 and the rechargeable electrical element 6, and on the other hand, the cap 38.

[0165] Figure 11 shows a side view of a fourth embodiment of an assembly according to the invention, omitting the rechargeable electrical element 6. Hereafter, only the differences compared to the previous embodiment will be described. Similar elements bear the same reference numerals.

[0166] The retaining element 14 includes a connecting plate 90 forming the connecting portion 37 between the first retaining portion 34 and the second retaining portion 36.

[0167] The connecting plate 90 has an inner annular portion which cooperates by complementarity of shapes with the positive pole of the primary electrochemical element 4 (indicated in dashed lines) and which is in this case the first holding portion.

[0168] The second retaining portion 36 comprises retaining arms 92 extending on either side of the rechargeable electrical element 6. The retaining arms 92 have ends that are located apart from each other. Thus, the second retaining portion 36 is interrupted circumferentially around the second central axis YY.

[0169] Figures 12 to 14 show a fifth embodiment of an assembly according to the invention. This embodiment combines aspects of the first and fourth embodiments. Hereafter, only the differences with respect to the first and fourth embodiments will be described. Analogous elements bear the same reference numerals.

[0170] Fig. 12 is a top view of this fifth embodiment.

[0171] The retaining element 14 includes a connecting plate 90 forming the connecting portion 37 between the first retaining portion 34 and the second retaining portion 36.

[0172] The first retaining portion 34 comprises the peripheral wall 40, and the first positioning surfaces 30 comprise an inner surface of the peripheral wall, similarly to the first embodiment. The first retaining portion 34 also comprises the axial stop 44, which is formed by an annular peripheral wall extending radially inward from the peripheral wall 40. The axial stop 44 is therefore formed by a peripheral portion adjacent to the connecting plate 90.

[0173] The connecting plate 90 does not include an inner annular portion which cooperates by complementary shapes with the positive pole of the primary electrochemical element 4.

[0174] Similar to the fourth embodiment, the second retaining portion 36 comprises retaining arms 92 extending on either side of the rechargeable electrical element 6. The retaining arms 92 have ends which are situated apart from each other and which form second positioning surfaces 32.

[0175] The second holding portion 36 includes positioning projections 68 similar to the projections 68 of the first embodiment and which also form second positioning surfaces 32.

[0176] Figures 15 to 18 show a sixth embodiment of an assembly 2 according to the invention. Hereafter, only the differences compared to the first embodiment will be described. Analogous elements bear the same reference numerals.

[0177] The spatial configuration predefined by the retaining element 14 includes the first central axis XX being parallel to, but not coaxial with, the second central axis YY. The primary electrochemical element 4 and the rechargeable electrical element 6 are arranged such that the front face 18 of the primary electrochemical element 4 and the front face 24 of the rechargeable electrical element 6 are axially substantially aligned.

[0178] The retaining element 14 is a retaining clip.

[0179] In this embodiment, the first retaining portion 34 is interrupted circumferentially around the first central axis XX. In this case, the first retaining portion 34 comprises two retaining walls 100 facing each other, which have partial cylinder surfaces 102 complementary to the peripheral surface of the primary electrochemical element 4. These partial cylinder surfaces 102 each extend over an angular range of less than 180° around the central axis XX, and for example, over an angular range between 60° and 100°. These partial cylinder surfaces 102 cover the primary electrochemical element 4 on at least one plane intersecting the central axis XX. Thus, the two retaining walls 100 radially retain the primary electrochemical element 4.

[0180] The retaining walls 100 advantageously extend over the entire axial length of the primary electrochemical element 4.

[0181] The first retaining portion 34 also includes an axial stop 44 in the form of two stop walls 104 which project radially inwards from one end of the retaining walls 100.

[0182] Stop walls 104 can be arranged on one axial end only or on both axial ends of the two retaining walls 100.

[0183] Similar to the first retaining portion 34, the second retaining portion 36 is interrupted circumferentially around the second central axis YY. In this case, the second retaining portion 36 comprises two retaining walls 106 facing each other, which have partial cylinder surfaces 108 complementary to the peripheral surface of the rechargeable electrical element 6. These partial cylinder surfaces 108 each extend over an angular range of less than 180° around the central axis YY, and for example, over an angular range between 60° and 100°. These partial cylinder surfaces 108 cover the rechargeable electrical element 6 on at least one plane intersecting the central axis YY. Thus, the two retaining walls 106 radially retain the rechargeable electrical element 6.

[0184] The retaining walls 106 extend over the entire axial length of the rechargeable electrical element 6.

[0185] The second retaining portion 36 also includes an axial stop in the form of two stop walls 110 which project radially inwards from one end of the retaining walls 100.

[0186] Figures 19 and 20 schematically represent a seventh embodiment of an assembly according to the invention in a median sectional view and an axial sectional view along the line XX-XX. The differences or similarities with the preceding embodiments will then be described. Analogous elements bear the same reference numerals.

[0187] The spatial configuration predefined by the retaining element 14 is identical to that of the fifth embodiment of Figures 15 to 18.

[0188] The retaining element 14 is axially closed on one side and axially open on the other side.

[0189] The second retaining portion goes all the way around the rechargeable electrical element around the second central axis YY.

[0190] Figure 21 schematically represents an eighth embodiment of a assembly according to the invention. Subsequently, the differences or similarities compared to previous embodiments will be described. Analogous elements bear the same reference numerals.

[0191] The spatial configuration predefined by the retaining element 14 includes the first central axis XX being coaxial with the second central axis.

[0192] The retaining element 14 comprises a hollow, tubular sleeve. The diameters of the first positioning surfaces 30 and the second positioning surfaces 32, defining the radial position of the primary electrochemical element 4 and the rechargeable electrical element 6, respectively, are identical.

[0193] The retaining element 14 is open on two axial sides.

[0194] The first positioning surfaces 30 respectively the second positioning surfaces 32 may include axial positioning surfaces formed for example by radial projections not shown.

[0195] The second retaining portion goes all the way around the rechargeable electrical element around the second central axis YY.

[0196] Figure 22 schematically represents a ninth embodiment of an assembly according to the invention. The differences compared to the eighth embodiment will then be described. Analogous elements bear the same reference numerals.

[0197] The retaining element 14 comprises, in addition to the hollow tubular sleeve, a plug 112 closing one axial end of the sleeve. The plug 112 forms an axial stop for the rechargeable electrical element 6 and thus defines axial positioning surfaces.

[0198] Electrical connection elements are not shown in all embodiments. They are of course present.

[0199] The following general characteristics may apply to each of the embodiments, provided that this is technically compatible:

[0200] The second retaining portion goes all the way around the rechargeable electrical element around the second central axis YY.

[0201] Alternatively, the cylindrical peripheral surface 16 has a non-circular cross-section, for example a rectangle with rounded corners or ends.

[0202] In an alternative not shown, the rechargeable electrical element is axially centered with respect to the front faces of the primary electrochemical element.

[0203] The assembly according to the invention is reliable and has a long service life for a given cost. Furthermore, the assembly according to the invention is economical and easy to manufacture. The assembly according to the invention also allows for the integration of a primary electrochemical element and a rechargeable electrical element in a predetermined manner within a device to be powered by the assembly.

[0204] The preceding description contains technical features of the invention. These technical features, although presented in a technical context and possibly in combination with other technical features, can each time be used individually, without the other technical features, insofar as this is technically possible.

Claims

Demands

1. Assembly (2), of the type comprising - a primary electrochemical element (4), - a rechargeable electrical element (6) electrically connected in parallel to the primary electrochemical element, and - a holding element (14) of the primary electrochemical element and the rechargeable electrical element relative to each other, the holding element maintaining the primary electrochemical element and the rechargeable electrical element relative to each other in a predefined spatial configuration, and the holding element comprising positioning surfaces defining the predefined spatial configuration, the positioning surfaces comprising first positioning surfaces (30), which are positioning surfaces of the primary electrochemical element, and second positioning surfaces (32), which are positioning surfaces of the rechargeable electrical element, and the first and second positioning surfaces (30, 32) defining the predefined spatial configuration in the presence and absence of contact of the primary electrochemical element and the rechargeable electrical element with these positioning surfaces; the assembly comprising a first central axis (XX), which is a central axis of the primary electrochemical element (4), and the assembly comprising a second central axis (YY), which is a central axis of the rechargeable electrical element, characterized in that the predefined spatial configuration includes the first central axis (XX) being perpendicular to the second central axis (YY).

2. Assembly according to claim 1, wherein the predefined spatial configuration comprises either the rechargeable electrical element (6) is axially centered on the first central axis, or the rechargeable electrical element is axially offset from the first central axis, or the rechargeable electrical element is axially aligned with respect to a front face of the primary electrochemical element, or the rechargeable electrical element is axially centered with respect to front faces of the primary electrochemical element.

3. Assembly according to claim 1 or 2, wherein the retaining element (14) is provided - with a first retaining portion (34) adapted to retain the primary electrochemical element and comprising the first positioning surfaces, and - with a second retaining portion (36) adapted to retain the rechargeable electrical element and comprising the second positioning surfaces.

4. Assembly according to claims 2 and 3 taken together, wherein on the one hand the first retaining portion (34) either goes all the way around the primary electrochemical element (4) around the first central axis (XX), or is interrupted circumferentially around the first central axis, or is an inner annular portion of a connecting plate and / or on the other hand the second retaining portion (36) either goes all the way around the rechargeable electrical element (6) around the second central axis, or is interrupted circumferentially around the second central axis.

5. Assembly according to claim 4, wherein - either the first retaining portion (34) extends along the entire length of the primary electrochemical element (4) along the first central axis, - or the primary electrochemical element extends axially beyond the first retaining portion.

6. Assembly according to any one of claims 3 to 5, wherein the first retaining portion (34) has a wall thickness (E1) greater than 0.200mm, in particular greater than 0.300mm, and / or the second retaining portion (36) has a wall thickness (E2) greater than 0.200mm, in particular greater than 0.300mm, and / or the retaining element (14) is made of plastic, in particular non-heat shrinkable.

7. Assembly according to any one of claims 3 to 6, wherein the retaining element (14) comprises a cap (38), provided with a peripheral wall (40) and an end wall (42), and wherein the first retaining portion comprises the peripheral wall.

8. Assembly according to claim 7, wherein the second retaining portion (36) comprises the end wall, and optionally the peripheral wall (40).

9. Assembly according to any one of claims 3 to 8, wherein the first retaining portion (34) comprises an axial stop (44).

10. Assembly according to any one of claims 7 to 9, wherein the second retaining portion (36) comprises positioning protrusions, and / or the first retaining portion (34) comprises either a peripheral wall (40) extending from a connecting portion, or an inner annular portion.

11. Assembly according to any one of claims 3 to 10, wherein the retaining element comprises one or the connecting portion (37) which connects the first retaining portion (34) and the second retaining portion (36).

12. Assembly according to any one of claims 1 to 11, wherein the rechargeable electrical element is coated with a sealing material (72), in particular polymer resin.

13. Assembly according to claim 12, wherein the sealing material has the physical property that the maximum percentage of water absorption after 30 days according to method 1 of ISO 62:2008 3rd edition is less than or equal to 1.0% and preferably less than or equal to 0.2%.

14. A method for manufacturing an assembly according to any one of the preceding claims, comprising the following successive steps: - supplying the primary electrochemical element (4), - supplying the rechargeable electrical element (6), - supplying the retaining element (14), - electrically connecting the rechargeable electrical element in parallel with the primary electrochemical element, - applying the rechargeable electrical element to the second positioning surfaces (32), - applying the primary electrochemical element to the first positioning surfaces (30), - fixing the rechargeable electrical element to the retaining element (14), and - fixing the primary electrochemical element to the retaining element (14).

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