阅读说明：本技术 蜂窝状的能量存储单元容纳件、电池组及制造电池组的方法 (Honeycomb-shaped energy storage cell holder, battery pack, and method for producing a battery pack ) 是由 安德烈亚斯·布伦纳 曼努埃尔·格劳尔 妮基察·泽里克 于 2020-03-30 设计创作，主要内容包括：本发明涉及一种用于固定和/或接触多个能量存储单元(2)的机动车能量存储单元容纳件(1),具有两个容纳装置(3),能量存储单元(2)保持在所述两个容纳装置之间,其中,所述能量存储单元(2)分别具有正极和负极的接触元件,其中,所述容纳装置(3)分别具有至少一个承载板(4)和至少一个接触片(5),其中,所述承载板(4)和所述接触片(5)都具有用于容纳所述多个能量存储单元(2)的蜂窝状结构。本发明还涉及一种具有机动车能量存储单元容纳件(1)的电池组(15)和一种用于制造电池组(15)的方法。(The invention relates to a motor vehicle energy storage unit holder (1) for fixing and/or contacting a plurality of energy storage units (2), comprising two holders (3) between which the energy storage units (2) are held, wherein the energy storage units (2) each have a positive and a negative contact element, wherein the holders (3) each have at least one carrier plate (4) and at least one contact strip (5), wherein the carrier plate (4) and the contact strips (5) each have a honeycomb structure for receiving the plurality of energy storage units (2). The invention further relates to a battery pack (15) having a motor vehicle energy storage cell holder (1) and to a method for producing a battery pack (15).)

1. A motor vehicle energy storage unit receptacle (1) for fastening and/or contacting a plurality of energy storage units (2), the motor vehicle energy storage unit receptacle has two receiving devices (3) between which the energy storage unit (2) is held, wherein the energy storage units (2) each have a contact element of a positive pole and a negative pole, wherein the receiving devices (3) each have at least one carrier plate (4) and at least one contact plate (5), wherein the carrier plate (4) and the contact plate (5) each have a honeycomb structure for accommodating the plurality of energy storage cells (2), characterized in that the carrier plate (4) has an outer, hexagonally shaped component receptacle (6) connected to one another, and the contact plate (5) has frames (9) of hexagonal configuration inside and outside connected to each other.

2. The motor vehicle energy storage unit receptacle (1) according to claim 1, characterized in that the carrier plate (4) is provided as a support body for receiving the plurality of energy storage units (2) and is configured in the form of a plate.

3. The motor vehicle energy storage unit receptacle according to any one of the preceding claims, characterized in that the contact piece (5) is provided for contacting the plurality of energy storage units (2) and is configured in the shape of a plate.

4. The motor vehicle energy storage unit receptacle (1) according to one of the preceding claims, characterized in that the at least one contact piece (5) is connected with the at least one carrier plate (4) in a form-fitting manner in a tensioned or non-fitting manner.

5. The motor vehicle energy storage unit receptacle (1) according to one of the preceding claims, characterized in that the positive contact elements of the plurality of energy storage units (2) are connected to the first contact piece (5) by a joining or sewing-like process and the negative contact elements of the plurality of energy storage units (2) are connected to the second contact piece (5) by a joining or sewing-like process.

6. The motor vehicle energy storage unit receptacle (1) according to claim 5, characterized in that the first contact piece (5) is arranged opposite the second contact piece (5).

7. A battery pack (15) having a motor vehicle energy storage unit receptacle (1) according to one of claims 5 or 6, characterized in that the first and second contact pieces (5) each form an upper outer side or a lower outer side of the battery pack (15) having two receiving devices (3) and a plurality of energy storage units (2) arranged between the two receiving devices.

8. Battery pack (15) according to claim 7, characterized in that a central hole (13) is arranged in the centre of the contact web (8), said central hole being dimensioned such that, when the battery pack (15) is completed, the contact elements of one of the plurality of energy storage units (2) engage to establish electrical contact.

9. Method for manufacturing a battery pack (15) according to claim 7 or 8, wherein at least one carrier plate (4) is injection-molded or compression-molded, at least one contact piece (5) is stamped or formed, and the carrier plate (4) and the contact piece (5) are constructed by a honeycomb structure for accommodating a plurality of energy storage cells (2).

Technical Field

The invention relates to an energy storage cell holder for fixing and/or contacting a plurality of energy storage cells, a battery pack having an energy storage cell holder, and a method for producing a battery pack.

Background

Battery packs are already known from the prior art. For example, DE 202014008335U 1 discloses a battery pack for electric vehicles, in which battery modules are arranged on a base plate, which are constructed from identical basic battery modules that can be connected to form larger sub-units, in particular battery sub-modules, wherein a layer of a flame-retardant material is provided between the base plate and the battery modules and on the other side of the battery modules.

Heretofore, retainers have been implemented on rigid lattice structures, usually manufactured in a molding process, which do not allow flexibility in their smallest units. These variants are mostly connected to the contact lugs in a form-fitting or force-fitting manner, wherein the "+" and "-" sides are then fixed in the housing. These solutions provide good handlability of the tolerances, however their flexibility is greatly limited.

Furthermore, holders have hitherto been provided in various embodiments as plug-in systems providing high flexibility. However, the handling of the occurring tolerance chains is very difficult here, and the contact with regard to the uniform fixability of the "+" and "-" sides is evaluated as poor.

Overall, it is disadvantageous in the embodiments according to the prior art that, on the one hand, there is no flexibility, in particular flexibility of the outer contour, and, on the other hand, a contacting and holding of the battery cells with a moderate fixability is achieved.

It is an object of the present invention to provide an energy storage cell receptacle which overcomes or at least reduces the disadvantages of the prior art. Therefore, a flexible device should be provided which simultaneously achieves a reliable holding and contacting of the battery cells.

Disclosure of Invention

The object of the invention is achieved in the device according to the invention in that the energy storage cell holder for fixing and/or contacting a plurality of energy storage cells is formed with two holders between which the energy storage cells are held, wherein the energy storage cells each have a positive and a negative contact element, wherein the holders each have at least one carrier plate/cell holder/carrier structure and at least one contact strip, wherein both the carrier plate/cell holder and the contact strips have a honeycomb structure for accommodating a plurality of energy storage cells.

In this way, the invention provides for the holding and contacting of the battery cells in a highly flexible manner and in a sustainable manner with completely different types of solutions for the holding elements and the contact elements connecting the "+" side and the "-" side. A honeycomb-like arrangement corresponding to the energy storage unit has the advantage of an efficient use of the installation space. Nevertheless, such an arrangement provides sufficient space between the individual energy storage units for cooling the units, for example by means of a fluid.

Furthermore, a device of the type mentioned has the advantage that the definition of a unit device can be produced cost-effectively.

Advantageous embodiments are claimed in the dependent claims and are set forth in more detail below.

For example, it is expedient if the carrier plate has a hexagonal component receptacle on the outside which is connected to one another, wherein each component receptacle has an inner contour which is dimensioned for the non-positive and/or positive retention of the energy storage unit. In other words, this means that the individually shaped hexagonal component receptacles are arranged next to one another and in this way form a preferably closed, planar carrier plate with a honeycomb structure.

Furthermore, it is advantageous if at least one or more component receptacles are connected on the outside with at least one or more component receptacles of the same type. In this case, the wall of the component holder comes into contact with the wall of the adjacent component holder. This ensures a space-efficient construction.

Preferably, the component holder has at least one axial position limiter for the energy storage unit, which is oriented in such a way that it rests against the end face of the energy storage unit or is arranged adjacent to the end face of the energy storage unit in the inserted state of the energy storage unit in the carrier plate.

Furthermore, it is expedient if the two opposing axial position limiters engage via the energy storage unit when the energy storage unit is arranged inside the wall of the component receptacle. In other words, this means that the axial position limiter defines the position of the battery to be accommodated in the axial direction.

It is therefore expedient for each axial position limiter to have a hook-like, tab-like or boomerang-like shape. In other words, this means that each axial position limiter has two legs, preferably of the same length, which project inward into the component holder and are connected to a further leg, which is parallel to the hexagonal lateral edges.

Further advantages result if the contact plate has a plurality of frames which are designed in a hexagonal manner on the inside and on the outside and are connected to one another in an integral manner or are fastened to one another in a separate construction. In this case, the frame of the design of the contact lug preferably corresponds in shape and size to the component holder of the carrier plate.

It is particularly expedient for the contact webs to be designed as web-like connections between two opposite corners of the hexagonally shaped frame. This has the particular advantage that the contact webs serve on the one hand for electrical contact with the energy storage cells and on the other hand the contact webs configured in this way impart stability to the hexagonally shaped frame.

Preferably, the axial position limiters of the component receiver converge toward one another and between them define a spacing region which is exactly covered or filled by the contact webs of the hexagonally shaped frame of the axial contact piece. In other words, this means that the width of the contact web corresponds to 1/5 being smaller than the length of the deployed axial position limiter.

Furthermore, it is advantageous if the thickness of the contact web measured in the axial direction preferably corresponds exactly to the thickness of the axial position limiter measured in the axial direction. In addition, it is expedient for all contact webs to be designed parallel to one another.

It is also expedient for the carrier plate to be provided as a support body for accommodating a plurality of energy storage cells and to be constructed in the form of a plate, preferably by plastic injection molding or by embossing. In other words, this means that support geometries which are produced in the form of plates, for example by injection molding of plastic or by molding, are developed on the basis of such honeycomb structures. It is advantageous here if the carrier plate is preferably made of plastic, in order on the one hand not to have electrically conductive properties and on the other hand to provide a sufficient support function in combination with the honeycomb structure and the support geometry associated therewith.

Preferably, the contact plate is provided for electrical contacting of a plurality of energy storage cells and is formed in the shape of a plate, preferably by stamping or by deformation. In other words, the contact lugs, which are likewise embodied as plates, are produced in a suitable manner with the carrier plate, for example in a stamping/deformation process.

The at least one contact lug is expediently connected to the at least one carrier plate in a form-fitting manner in a tensioned or non-positive manner. In other words, this means that the one contact piece and the carrier plate, depending on the later use/application purpose, require a form-fitting tensioning or alternatively a non-form-fitting interconnection in a method similar to the stitching/wrapping process of the stator winding head or the rotor winding head.

A stitching/binding process in this application is understood to be a process in which the at least one contact piece is connected to the at least one carrier plate such that the at least one contact piece resembles stitching or binding generally known from the textile field. By this procedure, therefore, the connection of materials of the same type or of different types is described by means of a seam, which brings the advantage that the seam connection is regarded as very stable and load-bearing.

It is furthermore advantageous if the composite of the at least one contact strip and the at least one carrier plate is configured such that the shape and dimensions are adapted along the (preferably flexible) honeycomb structure to a shape and dimensions corresponding to the intended purpose. In other words, the composite formed from the carrier plate/support body plate and the contact strip is now once again brought after joining along the honeycomb structure by a shearing process or sawing process very flexibly into a shape for later use. In other words, the geometric design of the body can be optimized for the later flexible shaping of the energy storage cell bundle by shearing and/or sawing. Accordingly, the contact element/energy storage cell pole and the contact piece may be in contact with each other.

It is also preferred that the positive contact elements of the plurality of energy storage units are connected to the first contact piece by joining, in particular welding, or by a process like a stitching/binding process of the stator or rotor winding head, and the negative contact elements of the plurality of energy storage units are connected to the second contact piece by joining, in particular welding, or by a process like a stitching/binding process of the stator or rotor winding head. In other words, the "+" and "-" sides of each energy storage unit to be housed may be connected by the engagement of the pole/contact elements and contact pads (e.g., welding) or by a process similar to stitching.

For this purpose, the first contact plate is expediently arranged opposite the second contact plate.

Furthermore, the invention relates to a battery pack or "InED battery pack" having an energy storage cell holder according to any of the preceding aspects, wherein the first and second contact tabs each form an upper or lower outer side of the battery pack formed by two holding devices and a plurality of energy storage cells arranged between the two holding devices. This means that the battery pack is constructed from the first lower side contact, the first carrier plate, the plurality of energy storage cells, then the second carrier plate, and then the second upper side contact plate in this order.

Advantageously, a central opening is arranged in the center of the contact web, which central opening is dimensioned such that, when the battery pack is completed, the contact elements of one of the plurality of energy storage units engage preferably positively and/or non-positively to establish the electrical contact. This has the advantage that, by the engagement of the contact elements/poles of each energy storage unit, the energy storage unit corresponds to a predetermined position via the respective central opening and can be fixed accordingly.

Preferably, the half thickness of the energy storage cell receptacle measured in the axial direction has less than one third of the thickness or height of the energy storage cell measured in the axial direction.

Overall, the hexagonal grid structure made of preferably reinforced plastic serves to receive or hold a plurality of cylindrical energy storage cells (in particular 18650 or 21700) in a non-positive and positive manner and associated geometrically similar/identical electrically conductive contact strips as common connections for the energy storage cells having the respective positive or negative pole.

The modular, interrelatable solution thus allows a high flexibility of the outer geometric contour or boundary of the energy storage cell holder or cell unit. In addition to the simple and cost-effective production by the largely uniform basic shape for the carrier plate and the contact strip, an arrangement for preventing polarity reversal is obtained by the identically oriented grouping of the energy storage cells.

The invention also relates to a method for producing a battery according to the above-mentioned aspects with respect to the battery, wherein at least one carrier plate is injection molded, preferably plastic injection molded or compression molded, at least one contact piece is stamped or formed, and the carrier plate and the contact piece are constructed by a honeycomb structure for accommodating a plurality of energy storage cells.

This has the advantage that, due to the geometry optimization and the method adaptation, the possibility arises of increasing the durability of the components and the component groups of the energy storage cell holder with the respective pole contact/contact element contact.

The invention therefore provides a high flexibility in the shaping of the later energy storage cell bundles with a very good control of the tolerances in all spatial directions simultaneously. Furthermore, the possibility exists of standardizing the basic components by means of an optimized geometry. This has the advantage of a lower cost of the value chain.

Drawings

The invention is elucidated below with the aid of the drawing. Wherein:

figure 1 shows a schematic view of a housing arrangement of an energy storage unit housing,

figure 2 shows a schematic view of the component accommodation of the carrier plate,

figure 3 shows a schematic view of a frame for contacting contact pieces of a contact element of an energy storage unit,

Figure 4 shows a schematic view of the carrier plate of one of the receiving means,

fig. 5 shows a schematic view of a contact plate of one of the receiving means, an

Fig. 6 shows a schematic diagram of a battery pack.

Detailed Description

The drawings are only schematic and are merely for the understanding of the present invention. Like elements are provided with like reference numerals.

The motor vehicle energy storage unit holder 1 for fastening and/or contacting a plurality of energy storage units 2 has two holders 3. Fig. 1 shows a schematic view of such a receiving device 3 of an energy storage cell receiver 1 according to the disclosure. Such receiving means 3 each have a carrier plate 4 and a contact plate 5. As can be seen in fig. 1, both the carrier plate 4 and the contact plate 5 have a honeycomb structure for accommodating a plurality of energy storage cells 2.

In fig. 1, it can be seen that the contact strip 5 is mounted on the carrier plate 4. Furthermore, the structure/shape and size of the contact strip 5 are adapted to the structure/shape and size of the carrier plate 4. As will be described in more detail below with reference to fig. 2, the component receptacle 6 of the carrier plate 4 is configured with two axial position limiters 7. As described in more detail with reference to fig. 3, the contact webs 8 of the hexagonally shaped frame 9 of the contact piece 5 are located between these axial position limiters 7 of the component receptacle 6.

As shown in fig. 1, the thickness in the axial direction of the contact piece 5 is approximately the thickness 1/10 of the carrier plate 4.

Fig. 2 is a schematic view of the component receptacle 6 of the carrier plate 4 according to the present disclosure. Each of the hexagonal component receptacles 6 has six lateral edges, which are referred to below as walls 8. The outer sides of the walls 8 are configured in line with each other to thereby form a flat carrier plate 4.

A defined number of component receptacles 6 bear against one another in combination with a defined number of frames 9 on the component receptacles 6 corresponding to the number of component receptacles 6 and thus form one of the two receptacles 3.

Axial position limiters 7 are respectively attached to two walls 10 that face each other. The axial position limiter 7 is of sheet-like design. Geometrically, each of the axial position limiters 7 has a first leg and a second leg 11, which are preferably of equal length/length configuration and preferably start in a corner point of the hexagonal component receiver 6 and project into the interior of the respective component receiver 6 at a predetermined, preferably identical angle. The first and second legs 11 pass through the wall 10 of the component holder 6 on one side and are connected to a third leg 12 which is oriented parallel to the respective wall 10.

Furthermore, it is provided according to fig. 2 that only the outer contour of the component receptacle 6 has a hexagonal shape and the inner contour of the component receptacle 6 has a shape/geometry corresponding to the shape/geometry of the energy storage unit 2 to be received. Preferably, a cylindrical energy storage unit 2, preferably a battery or an accumulator, is accommodated, and therefore the inner contour of the component receptacle 6 is preferably configured as a circle.

Fig. 3 shows a schematic view of a frame 9 for contacting a contact piece 5 of a contact element of an energy storage unit 2 according to the present disclosure. The contact webs 8 extend from an angular point of the hexagonal frame 9 to an angular point opposite to the angular point. Preferably, the contact webs 8 of the frame 9 are dimensioned at the most so widely that they form/occupy 1/3 of the entire width of the frame 9.

Each frame 9 has a central hole 13 in the centre. A central hole 13 is provided in the contact web 8 and serves to accommodate a contact element of the respective energy storage unit 2. Such contact elements (not shown) are each formed on an end face of the energy storage unit 2, one contact element being formed as a positive pole and one contact element being formed as a negative pole. Furthermore, the central opening 13 serves for the position-defined arrangement of the respective energy storage unit 2. The contact web 8 is oriented parallel to the two lateral frame edges 14 which are not in contact with the contact web.

Fig. 4 is a schematic view of a carrier plate 4 of the receiving mechanism in the receiving mechanism 3 according to the present disclosure. The carrier plate 4 has component receptacles 6 (as shown in fig. 2) which are connected to one another and are hexagonally shaped on the outside. At least one or more component receptacles 6 are connected on the outside with at least one or more component receptacles 6 of the same type. The axial position limiter 7 is oriented according to fig. 4 in the same direction in each component receiver 6. All third legs 12 of the component receivers 6, which are suspended together, are therefore arranged/oriented parallel to one another.

Fig. 5 shows a schematic view of the contact piece 5 of one of the receiving mechanisms 3 according to the present disclosure. The contact piece 5 has an interconnected inner and outer hexagonally shaped frame 9 (as shown in fig. 3). The arrangement of the frame 9 corresponds to the arrangement of the component accommodation portions 6. The contact webs 8 of all the frames 9 which are suspended together are oriented parallel to one another.

Fig. 6 shows a schematic diagram of a battery pack 15 according to the present disclosure. The battery pack 15 has an upper side formed by the contact pieces 5. The first contact strip 5 is placed on the first carrier plate 4 or fixed thereto. The component receptacle 6 of the first carrier plate 4 receives the energy storage unit 2. The position of the energy storage unit 2 is determined by the component receptacle 6 and is limited in the axial direction by the axial position limiter 7. The contact elements/poles (not shown) of the energy storage unit 2 engage in and are electrically connected to the respective central opening 13 in the respective contact web 8 of the upper contact plate 5.

A corresponding arrangement is provided on the underside of the battery pack 15. The underside of the battery pack 15 therefore has a contact lug 5, which abuts the carrier plate 4 and the carrier plate 4 in turn receives the other side of the energy storage unit 2. Thus, either all energy storage cells 2 have their "-" side on the lower side of the battery pack 15 and have their "+" side on the upper side of the battery pack 15 or correspondingly just the opposite.

According to fig. 6, the individual energy storage units 2 are connected to one another only by the contact strip 5 and the carrier plate 4. Between the energy storage units 2, air channels are provided in the region of the energy storage units 2 between the two receiving devices 3. In this way, cooling in the form of an air flow of the energy storage unit 2 can be provided or overheating can be avoided.

List of reference numerals

1 energy storage cell holder

2 energy storage unit

3 accommodating device

4 bearing plate

5 contact sheet

6 parts accommodation part

7 axial position limiter

8 contact web

9 frame

10 wall

11 first and second legs

12 third leg

13 center hole

14 side frame edge

15 Battery pack

The claims (modification according to treaty clause 19)

1. A motor vehicle energy storage cell holder (1) for fastening and/or contacting a plurality of energy storage cells (2), having two holders (3) between which the energy storage cells (2) are held, wherein the energy storage cells (2) each have a positive and a negative contact element, wherein the holders (3) each have at least one carrier plate (4) and at least one contact plate (5) for electrical contacting, which are connected to the at least one carrier plate (4) in a positively locking or non-positively locking manner, wherein the carrier plate (4) and the contact plate (5) each have a honeycomb-like structure for accommodating the plurality of energy storage cells (2), characterized in that the carrier plate (4) has an outer, hexagonally shaped component holder (6) which is connected to one another, and the contact plate (5) has a plurality of frames (9), the frames (9) being connected to one another, wherein each frame (9) is formed in a hexagonal shape on the inner side and on the outer side, respectively.

2. The motor vehicle energy storage unit receptacle (1) according to claim 1, characterized in that the carrier plate (4) is provided as a support body for receiving the plurality of energy storage units (2) and is configured in the form of a plate.

3. The motor vehicle energy storage unit receptacle according to any one of the preceding claims, characterized in that the contact piece (5) is provided for contacting the plurality of energy storage units (2) and is configured in the shape of a plate.

4. The motor vehicle energy storage unit receptacle (1) according to one of the preceding claims, characterized in that the at least one contact piece (5) has a connecting web (8) with an energy storage unit for electrical contacting.

5. The motor vehicle energy storage unit receptacle (1) according to one of the preceding claims, characterized in that the positive contact elements of the plurality of energy storage units (2) are connected to the first contact piece (5) by a joining or sewing-like process and the negative contact elements of the plurality of energy storage units (2) are connected to the second contact piece (5) by a joining or sewing-like process.

6. The motor vehicle energy storage unit receptacle (1) according to claim 5, characterized in that the first contact piece (5) is arranged opposite the second contact piece (5).

7. A battery pack (15) having a motor vehicle energy storage unit receptacle (1) according to one of claims 5 or 6, characterized in that the first and second contact pieces (5) each form an upper outer side or a lower outer side of the battery pack (15) having two receiving devices (3) and a plurality of energy storage units (2) arranged between the two receiving devices.

8. Battery pack (15) according to claim 7, characterized in that a central hole (13) is arranged in the centre of the contact web (8) in the contact sheet (5), said central hole being dimensioned such that, when the battery pack (15) is completed, the contact elements of one of the plurality of energy storage units (2) engage to establish electrical contact.

9. Method for manufacturing a battery pack (15) according to claim 7 or 8, wherein at least one carrier plate (4) is injection-molded or compression-molded, at least one contact piece (5) is stamped or formed, and the carrier plate (4) and the contact piece (5) are constructed by a honeycomb structure for accommodating a plurality of energy storage cells (2).