阅读说明：本技术 用于机动车辆的牵引电池系统 (Traction battery system for a motor vehicle ) 是由 S·穆斯图菲 C·福尔克默 P·克尔纳 于 2020-09-14 设计创作，主要内容包括：本发明涉及一种用于机动车辆的牵引电池系统,该牵引电池系统包括：牵引电池(3),该牵引电池被设计成能够以不可运动的方式接纳在该机动车辆(2)的车身中；以及保护结构(6),该保护结构被布置在牵引电池(3)与机动车辆(2)的行车道(5)之间,其中该保护结构(6)借助于固定系统(13)与牵引电池(3)连接。根据本发明,所述固定系统(13)是能够松脱的固定系统(13),其中,所述固定系统(13)被设计成具有阴元件和阳元件,该阴元件和该阳元件被设计成相互间实现形状配合连接。(The invention relates to a traction battery system for a motor vehicle, comprising: a traction battery (3) designed to be able to be received in a non-movable manner in the body of the motor vehicle (2); and a protective structure (6) which is arranged between the traction battery (3) and a roadway (5) of the motor vehicle (2), wherein the protective structure (6) is connected to the traction battery (3) by means of a fastening system (13). According to the invention, the fastening system (13) is a releasable fastening system (13), wherein the fastening system (13) is designed with a female element and a male element, which are designed to form a form-fit connection with each other.)

1. A traction battery system for a motor vehicle, the traction battery system comprising: a traction battery (3) designed to be able to be received in a non-movable manner in the body of the motor vehicle (2); and a protective structure (6) which is arranged between the traction battery (3) and a roadway (5) of the motor vehicle (2), wherein the protective structure (6) is connected to the traction battery (3) by means of a fastening system (13),

it is characterized in that the preparation method is characterized in that,

the fastening system (13) is a releasable fastening system (13), wherein the fastening system (13) is designed with a female element and a male element, which are designed to achieve a form-fitting connection with each other.

2. The traction battery system according to claim 1,

it is characterized in that the preparation method is characterized in that,

the fixing system (13) is designed in the form of a nylon lock or a pressure lock.

3. Traction battery system according to claim 1 or 2,

it is characterized in that the preparation method is characterized in that,

the protective structure (6) is designed in the form of a plate.

4. Traction battery system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the protective structure (6) has a flange (11) at its periphery for firmly fastening the protective structure (6) to the vehicle body and/or the traction battery (3).

5. Traction battery system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the protective structure (6) has at least one load introduction element (7) on its bearing surface (9) which is designed to face the traction battery (3).

6. The traction battery system according to claim 5,

it is characterized in that the preparation method is characterized in that,

the female or male element is arranged on a tab face (17) of the load introduction element (7) which is designed toward the traction battery (3).

7. Traction battery system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the female and/or male elements of the fastening system (13) are connected to the protective structure (6) and/or the traction battery (3) in a material-fit manner.

8. The traction battery system according to claim 7,

it is characterized in that the preparation method is characterized in that,

the material-fit connection is realized by means of an adhesive material.

9. Traction battery system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the protective structure (6) is fastened to a battery module (4) of the traction battery (3).

10. Traction battery system according to one of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the fastening points (18) of the fastening system (13) are formed over a large area on the protective structure (6) and on the traction battery (3).

Technical Field

The present invention relates to a traction battery system for a motor vehicle according to the preamble of patent claim 1.

Background

Traction battery systems for motor vehicles are known. A plurality of battery modules are involved, which have a plurality of battery cells which are designed for an electric or partial drive in the form of a hybrid drive. A plurality of battery cells are bundled into one battery module, wherein the plurality of battery modules are received in a battery housing of the traction battery. The traction battery is protected against the roadway of the motor vehicle by means of a plate-shaped protective structure which is fastened to the support element, preferably to the transverse and longitudinal supports of the battery housing, by screwing.

From documents US 2007/224498 a1, US 2012/301770 a1 and US 2015/035370 a1, a traction battery is known, which is assembled from a plurality of battery cells, wherein the individual battery cells are connected to one another by means of nylon latches or shackles. Furthermore, US 2012/301770 a1 discloses a heat-conducting plate which is arranged between two battery cells and is fastened to the battery cells with nylon locking pieces.

A traction battery system is known from the documents US 2018/294503 a1 and US 2017/144566 a1, respectively, in which the battery cells are arranged between two tension member plates, which serve to protect the battery cells, in particular in the event of a crash.

Patent document US 9,016,765B 1 discloses a traction battery system for a motor vehicle, which comprises a plurality of battery cells, which are protected against a traffic lane by means of a battery protection structure against damage due to contact with the traffic lane. The battery protection structure is firmly connected to the traction battery system by means of screws on the side of the traction battery system that is designed to face the roadway. In order to protect the traction battery, a plurality of battery protection structures are provided.

Disclosure of Invention

The object of the present invention is to provide an improved traction battery system for a motor vehicle, in particular with a reduced installation space.

According to the invention, this object is achieved by a traction battery system for a motor vehicle having the features of patent claim 1. Advantageous embodiments of the invention with suitable and important developments are specified in the respective dependent claims.

The traction battery system for a motor vehicle according to the present invention comprises: a traction battery designed to be able to be received in a body of the motor vehicle in an immovable manner; and a protective structure arranged between the traction battery and a traffic lane of the motor vehicle. The protective structure is connected to the traction battery by means of a fastening system. According to the invention, the fastening system is a releasable fastening system, wherein the fastening system is designed with a female element/female part and a male element/male part, wherein the female element and the male element are designed to achieve a form-fit connection with each other. In other words, the fastening system is composed of at least two parts (female element and male element), wherein the two parts can form a releasable, preferably repeatedly releasable, form-fit connection. The advantage is that the protective structure is connected to the traction battery in a manner that is space-optimized and can be released quickly in the case of maintenance. For example, in the case of a battery module in which the traction battery has to be replaced, a quick and therefore cost-effective removal of the protective structure can be achieved due to the quick releasable fastening system. Conventional protective structures are connected to the traction battery or to a housing associated with the traction battery by means of a plurality of bolts or other non-repeatably releasable connecting elements, the release of which represents a high expenditure of time. The proposed fixing system enables repeated attachment of the protective structure to the traction battery even if detachment of the protective structure may occur due to excessive loads.

Preferably, the fastening system is designed in the form of a hook and loop fastener (klettverseschluss) or a pressure lock/mushroom fastener (druckverseschluss). In other words, a repeated connection or disconnection between the protective structure and the traction battery can be achieved, while the effort involved in releasing the connection and in establishing the connection is low. The advantage of the nylon locking or pressure locking avoids a local reduction of the so-called crash performance of the protective structure, since it is not necessary to design a hole in the protective structure which constitutes the initial position of the fracture, as is the case, for example, with a bolt connection.

In a further embodiment, the protective structure is designed in the form of a plate, as a result of which a smaller extension of the protective structure in the direction of the vertical axis of the vehicle body can be achieved and thus a reduction of the overall height of the body of the motor vehicle can be achieved. Preferably, due to the plate-shaped protective structure, a ground clearance of the floor of the vehicle body which is as small as possible is conceivable.

In order to receive the protective structure fixedly on the motor vehicle, the protective structure has a flange on its periphery for fastening the protective structure firmly to the vehicle body and/or the traction battery. In other words, the protective structure can be connected to the vehicle body at its periphery, in particular by means of a flange, which forms a kind of flange. For a fixed connection, a connecting element, for example a screw, can be used. However, due to the fixing system, these bolts can be reduced in their number.

In a further embodiment of the traction battery system according to the invention, the protective structure has at least one load introduction element on its bearing surface which is designed to face the traction battery. Preferably a plurality of load introduction elements are formed. These load introduction elements serve to absorb forces acting on the protective structure from the direction of the roadway, so that forces acting on the traction battery are at least reduced, but preferably prevented.

In order to form a fixed connection between the female element and the male element, the element (female element or male element) mounted on the protective structure is arranged on the tab side of the load-introducing element which is designed towards the traction cell.

The material-fit connection of the female and/or male element of the fixing system to the protective structure and/or the traction battery constitutes a cost-effective and rapidly implementable connection solution between the component and the fixing system. A particularly cost-effective traction battery system can be realized with a material-fit connection by means of an adhesive material.

In a further embodiment of the traction battery system according to the invention, the protective structure is fastened to the battery module of the traction battery. This means that a preferably low height of the traction battery system is formed, since intermediate elements between the battery module and the protective structure can be dispensed with due to the direct connection of the protective structure. The battery module is usually received in a battery housing of the traction battery, which, in addition to its lateral surfaces, has a cover plate which closes the housing upward and a base plate which closes the housing downward. In order to avoid damage to the battery module, the base plate is usually designed with a certain thickness, so that connecting elements in the form of bolts or pins or rivets can form a fixed connection of the protective element to the traction battery. Since the fastening system is embodied so as not to penetrate into the base plate, in particular in the case of nylon locking elements, the base plate can either be significantly reduced in its thickness or can be dispensed with, as is the case in the proposed design. In the case of a protective structure having at least one load introduction element, the overall height of the traction battery system and thus the structural space is reduced while at least the so-called crash performance is maintained, which is even improved according to the embodiment of the load introduction element.

In a further embodiment of the traction battery system according to the invention, the fastening point of the fastening system is formed over a large area on the protective structure and on the traction battery. In other words, the fastening points of the fastening system are formed in a preferably uniformly distributed manner over a large area of the protective structure. The advantage is that the acoustics is improved when the protective structure is connected to the traction battery in a large-area distributed manner by the fixing system, thereby avoiding a tendency to vibrate and thus also avoiding detachment of the protective structure.

A cost-effective and space-optimized traction battery system for a motor vehicle can thus be achieved, which, in particular in the case of a vehicle construction in which the battery module carries the load and the battery box is dispensed with, makes it possible for the protective structure to be connected to the vehicle body only in its edge region, wherein deformations of the protective structure associated with the operating load of the motor vehicle are prevented by the fastening system.

Drawings

Further advantages, features and details of the invention are obtained from the following description of preferred embodiments and with the aid of the drawings. The features and feature combinations mentioned above in the description and the features and feature combinations mentioned below in the description of the figures and/or shown in the figures individually can be used not only in the respectively given combination but also in other combinations or alone without departing from the framework of the invention. Identical reference numbers are assigned to identical or functionally identical elements. In the drawings:

fig. 1 shows a part of a traction battery system according to the invention in a sectional view, and

fig. 2 shows a battery protection structure of the traction battery system in a perspective view.

Detailed Description

Fig. 1 shows a detail of a traction battery system 1 according to the invention for a motor vehicle 2 in cross section. The motor vehicle 2 has a body (not shown in detail) which is designed to receive the traction battery system 1. The traction battery 3 of the traction battery system 1 comprises a plurality of battery modules 4, each having a plurality of battery cells (not shown in detail), which are received in a module housing 14 of the battery module 4.

The traction battery 3 is designed in the shape of a cuboid, wherein it is received in a cavity of the body in such a way that it is bounded by the body at least on its side faces and on its top face formed towards the body. In another embodiment (not shown in detail), the traction battery 3 has a battery housing which is designed to receive the battery module 4.

On the bottom side of the traction battery 3, which is formed facing away from the top side, the traction battery is covered by means of a protective structure 6 with respect to the roadway of the motor vehicle 2. In other words, at least the protective structure 6 is arranged between the roadway and the traction battery 3. In the embodiment shown, the protective structure 6 is arranged directly on the module housing 14. In the case of a traction battery 3 with a battery housing, however, it is also possible for protective structures to be arranged on this battery housing. The traction battery 3 can also be placed in a receptacle of the vehicle body with or without a battery housing, which completely surrounds the traction battery 3 on its circumference, wherein the protective structure 6 is arranged on the side of the receptacle facing the traffic lane 5.

The protective structure 6 is configured in the form of a plate and has a plurality of load introduction elements 7 with a u-shaped or v-shaped contour 8. In order to improve the load absorption, the legs 15 of the load introduction element 7 are preferably embodied at an angle to the element webs 16 of the load introduction element 7 which are formed toward the traction battery 3 and which connect the legs 15 to one another, wherein an angle α is formed between the element webs 16 and the legs 15, which angle has a value of more than 90 °.

The protective structure 6 has a receiving plate 9 which supports the load introduction elements 7 and is delimited at its outer periphery by a collar 11 which rises towards the traction battery 3 relative to a support surface 10 with the load introduction elements 7. The collar 11 has a plurality of receiving openings 12 for receiving fasteners, preferably releasable fasteners, in particular bolts (not shown in detail).

In this embodiment shown in fig. 1 and 2, the protective structure 6 is fastened to the body of the motor vehicle 2 by means of fasteners. This fastening means is preferably used in a vehicle construction mode in which the battery module 4 is designed to carry loads and in which a battery housing designed to receive the battery module 4 is omitted. It is likewise possible for the protective structure 6 to be fastened firmly to the battery module 4 or additionally also to the vehicle body.

In order to avoid the protective structure 6 from bending in the direction of the carriageway 5 (for example when the operating load of the motor vehicle 2 is high), the protective structure 6 is connected to the battery module 4 by means of a fastening system 13 which establishes a releasable connection, wherein the fastening system 13 is designed in the present embodiment in the form of a nylon locking piece. Connecting the protective structure 6 to the battery module 4 enables a reduction in the extension of the traction battery system 1, which is composed of the traction battery 3 and the protective structure 6, in the direction of the vertical axis of the vehicle body. In another embodiment (not shown in detail), the fixing system 13 is realized in the form of a pressure lock.

The exemplary fixing system 13 is distinguished in principle in that one of the elements to be connected (protective structure 6 and exemplary battery module 4) has the female element of the fixing system 13 and the other element has the male element of the fixing system 13. That is to say in other words, the battery module 4 can either have a female element or a male element, and the protective structure 6 can therefore have a male element or a female element in order to achieve the connection.

The fixing system 13 is further distinguished in that the female element is designed for a repeatable, releasable connection with the male element, wherein a form-fitting connection is obtained between the female element and the male element. Upon application of a certain force, the positive-fit connection separates, wherein, in the absence of defects in the two elements and thus in the fixing system 13, a re-establishment of the connection can be achieved.

The nylon locking pieces 13 used in the present embodiment are designed in the form of a strip, wherein the elements of the fixing system 13 (female element and male element) are connected with the corresponding components (battery module 4 and protective structure 6) by means of a material-fit connection, preferably with an adhesive material.

The elements of the fastening system 13 which are mounted on the protective structure 6 can be fastened to the support surface 9 or the load introduction element 7, for example, with a material fit. Naturally, the element can also be fastened to the bearing surface 9 and the load introduction element 7. Advantageously, the elements of fastening system 13 mounted on protective structure 6 are positioned on a web surface 17 of element web 16 opposite battery module 4.

In order to avoid bending of the protective structure 6, the elements of the fixing system 13 are preferably arranged in the middle region of the receiving plate 9. The number of fixing points 18 of the fixing system 13 depends on the dimensions of the protective structure 6 and on the coupling force between the female and male elements of the fixing system 13. The fastening points 18 of the fastening system 13 are formed over a large area on the protective structure 6 and the traction battery 3.

The element of the fastening system 13 opposite the protective structure 6, which is likewise designed in the form of a band in the present exemplary embodiment, is fastened to the battery module 4 with adhesive material. The element can likewise be connected to a battery box, a battery base, a battery housing or a battery module housing. The element is therefore mounted on the battery side, preferably opposite the protective structure 6.