CN216793876U - CTP square shell electricity core module mounting structure - Google Patents

Abstract

The utility model relates to a CTP square shell battery cell module mounting structure, which can comprise: the battery cell packaging box comprises a rectangular box body, wherein the box body comprises at least one beam, and battery cells are directly arranged in the box body in groups from the beam; the two fixed blocks are respectively and fixedly arranged at the front end and the rear end of one side of the box body far away from the cross beam; and the end plate is inserted between the battery cell and the fixing block so as to fix the battery cell module in the box body. The CTP square shell structure is simple in structure, reduces assembly steps compared with the existing CTP square shell scheme, is convenient to assemble, improves production efficiency, and reduces material cost and has lower requirements on position accuracy of box body cross beams due to the fact that only one end plate is used for a module.

Description

CTP square shell battery cell module mounting structure

Technical Field

The utility model relates to the technical field of power battery production, in particular to a CTP square-shell battery cell module mounting structure.

Background

The CTP technology of the power battery is to directly connect a large number of battery cores in series and parallel together by omitting a module, and when the CTP technology is seen from the effect, the CTP technology can play a role in reducing the use of parts, thereby achieving the purposes of optimizing the space utilization rate and simultaneously lightening the total weight of a battery pack and further achieving the effect of improving the energy density of the battery. Meanwhile, the CTP technology is also advantageous to the de-molding of the power battery, and the battery module is directly arranged in the whole vehicle through the fixing piece penetrating through the sleeve or by utilizing the mounting beam.

Fig. 1 shows that the existing CTP square shell battery cell module has the following installation procedures: stacking the battery cells, installing the end plates, pressurizing the module and putting the module into a box, specifically, arranging the battery cells in groups outside the box, and then fixedly installing the two end plates on two ends of the battery cell module; and then pressurizing two ends of the battery cell module to enable the battery cells to be tightly attached together, and finally loading the battery cells into the box body. The installation process of current CTP square shell electricity core module is more, and is comparatively more time-consuming on the one hand, and work efficiency is low, and on the other hand is higher to box crossbeam's position required precision owing to adopt two box crossbeam roof beam fixed module positions.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a CTP square shell battery cell module mounting structure which can be conveniently assembled and improve the working efficiency.

In order to realize the purpose, the technical scheme adopted by the utility model is as follows:

a CTP square shell battery cell module mounting structure, which may comprise:

the battery cell packaging box comprises a rectangular box body, wherein the box body comprises at least one beam, and battery cells are directly arranged in the box body in groups from the beam;

the two fixed blocks are respectively arranged at the front end and the rear end of one side of the box body far away from the cross beam; and

and the end plate is inserted between the battery cell and the fixing block so as to fix the battery cell modules which are arranged in the box body.

In a preferred embodiment, the fixing block and the end plate are matched by adopting an inclined surface.

In a preferred embodiment, a self-locking structure is arranged between the fixing block and the end plate.

In a preferred embodiment, the self-locking structure is a sawtooth structure.

In a preferred embodiment, the included angle alpha between the sawtooth inclined plane of the fixed block and the horizontal plane is more than or equal to 60 degrees and less than or equal to 85 degrees; and the included angle beta between the sawtooth inclined plane of the end plate and the horizontal plane meets the condition that beta-alpha is less than or equal to 3 degrees.

In a preferred embodiment, the height f of the individual serrations satisfies 0.4mm ≦ f/tan α ≦ 1.5 mm.

In a preferred embodiment, the length c of a single sawtooth in the horizontal direction on the sawtooth inclined plane of the fixed block meets the condition that c is more than or equal to 0.8mm and less than or equal to 3 mm; and the length d of the single sawtooth in the horizontal direction on the sawtooth inclined plane of the end plate meets the condition that | d-c | is less than or equal to 0.4 mm.

In a preferred embodiment, the serrations have chamfers or R ═ e fillets of length e at crest corners, e satisfying 0mm ≦ e ≦ 1 mm.

In a preferred embodiment, the two fixing blocks are respectively fixed on the front beam and the rear beam of the box body through screws.

In a preferred embodiment, the end plate is a hollow plate.

In a preferred embodiment, the CTP square-shell battery cell module mounting structure may further include a gasket interposed between the battery cell and the end plate.

By adopting the technical scheme, the CTP square shell structure has the advantages that the structure is simple, compared with the existing CTP square shell scheme, the CTP square shell structure reduces the assembly steps, is convenient to assemble, improves the production efficiency, and simultaneously, only one end plate is used for a module, so that the material cost is reduced, and the requirement on the position precision of a box body cross beam is lower.

Drawings

Fig. 1 is a schematic diagram of an assembly process of a conventional CTP square-shell battery cell module;

fig. 2 is a perspective view of a CTP square-shell battery cell module mounting structure according to the present invention, wherein an end plate mounting process is shown;

fig. 3 is another schematic perspective view of the CTP square-shell battery cell module installation structure shown in fig. 2, illustrating the CTP square-shell battery cell module after installation is completed;

fig. 4 is a schematic view of a self-locking structure between an end plate and a fixing block of the CTP square-shell battery cell module mounting structure shown in fig. 2;

fig. 5 is a schematic diagram illustrating the size of a fixing block and an end plate of the CTP square-shell battery cell module mounting structure shown in fig. 2.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 2 and 3, an installation structure of a CTP square-shell battery cell module may include a rectangular box 1, two fixing blocks 2, and an end plate 3. Wherein, the shape and size of box 1 is the same with the shape and size of the box of current CTP square shell electricity core module. In the illustrated embodiment, the left and right sides of the cabinet 1 are a cross member 11 and an opening 12, respectively, to facilitate assembly. Of course, the tank 1 can also have two beams, i.e. no openings 12. The two fixing blocks 2 are respectively fixedly installed on the front end and the rear end of the opening 12. Specifically, the two fixing blocks 2 can be respectively and fixedly mounted on the front and rear beams of the box body 1 through hexagon socket head cap screws, so that the installation and the disassembly are convenient. In this embodiment, the fixing block 2 is provided with four countersunk screw holes 22. When installing CTP square shell battery cell module, battery cell 100 directly begins to arrange in groups to opening 12 direction from crossbeam 11 in box 1. End plate 3 inserts between electric core 100 and the fixed block 2 (as shown in fig. 2) to fix the electric core module of arranging in box 1, the CTP square shell electric core module of installing is shown in fig. 3.

Preferably, an inclined surface is adopted between the fixing block 2 and the end plate 3 to absorb the length tolerance of the cell. That is, the cross sections of the fixed block 2 and the end plate 3 are both right-angled trapezoids. As shown in fig. 5, when the actual length a of the arranged cells is shorter than the theoretical length, the end plate moves downward, and the length b increases, thereby absorbing the length tolerance of the cells. Therefore, the requirement on the position precision of the inner cross beam of the CTP box body is reduced, and the box body can be assembled smoothly when the welding deformation is large.

Preferably, a self-locking structure is arranged between the fixing block 2 and the end plate 3 to prevent the end plate 3 from being separated to cause the battery cell 100 to be loosened. In this embodiment, the self-locking structure is a saw-tooth structure, as shown in fig. 4. Specifically, the opposite slopes between the fixing block 2 and the end plate 3 have serrations that engage with each other, so that the end plate 3 can be inserted downward between the fixing block 3 and the battery cell 100 without being pulled upward. When the end plate 3 is to be pulled out, the fixing block 2 must be removed first.

As shown in fig. 5, the dimensional fit relationship between the fixing block 2 and the end plate 3 is as follows:

the included angle alpha between the sawtooth inclined plane 21 of the fixed block 2 and the horizontal plane is more than or equal to 60 degrees and less than or equal to 85 degrees; and the included angle beta between the sawtooth inclined plane 31 of the end plate 3 and the horizontal plane meets the condition that beta-alpha is less than or equal to 3 degrees;

the height f of each sawtooth meets the condition that f/tan alpha is more than or equal to 0.4mm and less than or equal to 1.5mm, and the f/tan alpha value is used for applying pretightening force to the CTP square-shell battery cell module;

the length c of a single sawtooth in the horizontal direction on the sawtooth inclined plane 21 of the fixed block 2 meets the condition that c is more than or equal to 0.8mm and less than or equal to 3mm, and the value of c is used for limiting; the length d of the single sawtooth in the horizontal direction on the sawtooth inclined plane 31 of the end plate 3 meets the condition that | d-c | is less than or equal to 0.4 mm;

the sawtooth is provided with a chamfer with the length e or a chamfer with the length R ═ e at the tooth crest angle, and the e satisfies that the e is more than or equal to 0mm and less than or equal to 1 mm.

Preferably, the end plate 3 is a hollow plate to reduce the amount of material and save cost. In order to ensure sufficient strength, the cavity of the end plate 3 has a plurality of reinforcing spacers 32 extending along its length. The end plate 3 may be integrally formed. The end plate 3 and the fixing block 2 may be made of metal such as aluminum, stainless steel, or the like or of non-metallic material such as plastic, or the like.

In addition, this CTP square shell electricity core module mounting structure still can include backing plate 4, backing plate 4 is inserted and is established between electric core 100 and end plate 3 to be applicable to the electric core 100 of different specifications. Specifically, when the battery cell 100 is assembled, the distance between the battery cell and the fixing block 3 is greater than the maximum thickness of the end plate 3, and the maximum thickness can be compensated by inserting the backing plate 4. The thickness of the gasket 4 is generally smaller than the thickness of the battery cell 100. The backing plate 4 may be made of a material having a certain hardness and elasticity, such as rubber.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the utility model can be effected therein by those skilled in the art after reading the above teachings of the utility model. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (12)

1. The utility model provides a CTP square shell electricity core module mounting structure which characterized in that includes:

the battery cell packaging box comprises a rectangular box body, wherein the box body comprises at least one beam, and battery cells are directly arranged in the box body in groups from the beam;

the two fixed blocks are respectively and fixedly arranged at the front end and the rear end of one side of the box body far away from the cross beam; and

and the end plate is inserted between the battery cell and the fixing block so as to fix the battery cell modules which are arranged in the box body.

2. The CTP square shell battery cell module mounting structure of claim 1, wherein the fixing block and the end plate are in inclined surface fit.

3. The CTP square-shell battery cell module mounting structure of claim 2, wherein a self-locking structure is provided between the fixing block and the end plate.

4. The CTP square shell battery cell module mounting structure of claim 3, wherein the self-locking structure is a sawtooth structure.

5. The CTP square-shell battery cell module mounting structure of claim 4, wherein an included angle α between a sawtooth inclined plane of the fixing block and a horizontal plane is greater than or equal to 60 degrees and less than or equal to 85 degrees; and the included angle beta between the sawtooth inclined plane of the end plate and the horizontal plane meets the condition that beta-alpha is less than or equal to 3 degrees.

6. The CTP square shell cell module mounting structure of claim 5, wherein the height f of a single sawtooth satisfies f/tan α ≦ 1.5 mm.

7. The CTP square-shell battery cell module mounting structure of claim 4, wherein the length c of a single sawtooth on the sawtooth inclined plane of the fixing block in the horizontal direction satisfies 0.8mm ≤ c ≤ 3 mm; and the length d of the single sawtooth in the horizontal direction on the trapezoidal sawtooth inclined plane of the end plate meets the condition that | d-c | is less than or equal to 0.4 mm.

8. The CTP square-shell battery cell module mounting structure of claim 4, wherein the sawteeth have chamfers with length e or fillets with length R ═ e at the top corners, and e satisfies 0mm ≦ e ≦ 1 mm.

9. The CTP square-shell battery cell module mounting structure of claim 1, wherein the box comprises the cross beam and the opening at the left and right sides of the box, and the two fixing blocks are respectively fixedly mounted at the front and rear ends of the opening.

10. The CTP square shell battery cell module mounting structure of claim 1 or 9, wherein the two fixing blocks are respectively fixed on the front and rear beams of the box body by screws.

11. The CTP square-shell cell module mounting structure of claim 1, wherein the end plate is a hollow plate.

12. The CTP square shell cell module mounting structure of claim 1, further comprising a gasket plate interposed between the cell and the end plate.

Images