CN219144529U

CN219144529U - Collecting conducting strip, battery module and battery pack

Info

Publication number: CN219144529U
Application number: CN202223595230.6U
Authority: CN
Inventors: 周航; 杨红新; 张建彪; 仇惠惠; 常一鸣
Original assignee: Dr Octopus Intelligent Technology Shanghai Co Ltd
Current assignee: Dr Octopus Intelligent Technology Shanghai Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-06
Anticipated expiration: 2032-12-30

Abstract

The utility model provides a collecting conducting plate, a battery module and a battery pack, wherein the collecting conducting plate comprises a conducting plate body connected between a battery cell and a BMS collecting plate, the conducting plate body is provided with a first conducting plate connected with the BMS collecting plate, a second conducting plate connected with the battery cell and a connecting conducting plate connected with the first conducting plate and the second conducting plate; the first conducting strip is integrated with the connecting conducting strip and is arranged at an included angle, and a U-shaped buffer structure which arches out to one side of the thickness direction of the first conducting strip is arranged at the joint of the first conducting strip and the connecting conducting strip. According to the collecting conductive sheet, the structure of the conductive sheet body is optimized, and the U-shaped buffer structure is arranged, so that stress at the joint of the first conductive sheet and the second conductive sheet can be absorbed and decomposed when vibration occurs, the structural strength of the conductive sheet body is improved, and breakage of the conductive sheet body is prevented.

Description

Collecting conducting strip, battery module and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to an acquisition conducting strip. Meanwhile, the utility model also relates to a battery module provided with the collecting conducting plate and a battery pack provided with the battery module.

Background

The development of the electric automobile drives the development of the power battery technology, so that the power battery is developed towards the high-density, low-cost and long-endurance directions. One of the important development directions is CTP (cell to pack), namely, the battery cell is directly transferred to the battery pack instead of being transferred to the battery pack by the module, so that a great amount of mechanical structures and space can be saved, more space is saved for placing the battery cell to improve the energy density, and meanwhile, the cost is saved due to the fact that the module shell is saved.

In the prior art, the connection mode of the battery cell of CTP and the BMS acquisition board is mainly four, and the battery cell is connected by bolts, wire harnesses, aluminum wire bonding and welding and nickel sheet connection. The nickel sheet is connected in such a way that the single voltage of the battery core is acquired by welding the nickel sheet on the electrode lug or the bus bar of the battery core and the bonding pad between the BMS sampling plates, and the nickel sheet connection is ensured compared with the aluminum wire bonding welding connection yield.

At present, the mainstream host factories are developing the nickel sheet connection process, but the existing nickel sheets are limited by the structure of the nickel sheets, the phenomenon of fracture easily occurs in the use process, and the nickel sheets are difficult to maintain after fracture and can only be replaced. In addition, since the power supply needs to be disconnected when the BMS collecting board is inspected, namely the nickel sheet needs to be disconnected, however, the nickel sheet cannot be restored once disconnected, and must be scrapped, so that the cost is wasted.

Disclosure of Invention

In view of this, the present utility model aims to propose a collecting conductive sheet to optimize the structure of the conductive sheet between the cells and the BMS collecting plate.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the collecting conducting strip comprises a conducting strip body connected between a battery cell and a BMS collecting plate, wherein the conducting strip body is provided with a first conducting strip connected with the BMS collecting plate, a second conducting strip connected with the battery cell and a connecting conducting strip connected with the first conducting strip and the second conducting strip;

the first conducting strip with connect the conducting strip is integrative and the contained angle sets up, just first conducting strip with connect the junction of conducting strip, be equipped with to one side of first conducting strip thickness direction arch out's U type buffer structure, buffer structure is used for absorbing and decomposing when taking place the vibration first conducting strip with the stress of second conducting strip junction.

Further, the buffer structure comprises a first connecting portion connected with the first conductive sheet, a second connecting portion integrally connected with the connecting conductive sheet, and a third connecting portion connected between the first connecting portion and the second connecting portion, wherein the first connecting portion is connected with the first conductive sheet, the third connecting portion is connected with the first connecting portion, and the third connecting portion is connected with the second connecting portion, and included angles are formed between the third connecting portion and the second connecting portion.

Further, the first conductive sheet is arranged perpendicular to the connecting conductive sheet; and/or, the first connecting part and the first conducting strip, the third connecting part and the first connecting part, and the third connecting part and the second connecting part are all arranged vertically.

Further, the first conductive sheet is connected to the bottom of the BMS collecting plate, and the buffer structure is upwardly arched in the thickness direction of the first conductive sheet.

Further, the BMS collecting plate is provided with a groove penetrating through the thickness direction of the BMS collecting plate, and the buffer structure is located in the groove.

Further, the connecting conductive sheet is connected with the second conductive sheet in a clamping manner.

Further, the connecting conducting strip is provided with a buckle, the second conducting strip is provided with a clamping hole, and the buckle is clamped in the clamping hole.

Further, the collecting conductive sheet is a nickel sheet.

Compared with the prior art, the utility model has the following advantages:

according to the collecting conductive sheet, the structure of the conductive sheet body is optimized, and the U-shaped buffer structure which is arched to one side of the thickness direction of the first conductive sheet is arranged at the joint of the first conductive sheet and the connecting conductive sheet, so that the stress at the joint of the first conductive sheet and the second conductive sheet can be absorbed and decomposed when vibration occurs, and the structural strength of the conductive sheet body is improved, and the breakage of the conductive sheet body is prevented.

In addition, through being provided with the recess on BMS gathers the board, can make gather the conducting strip can not occupy the space of battery package inside more, be favorable to promoting the space utilization of battery package inside.

In addition, through making the connection conducting strip and the second conducting strip joint link to each other, be convenient for realize the connection or disconnection between electric core and the BMS collection board through connecting or disconnection between connection conducting strip and the second conducting strip.

Another object of the present utility model is to provide a battery module having the collecting conductive sheet as described above.

It is still another object of the present utility model to provide a battery pack including the battery module as described above.

The battery module and the battery pack have the same beneficial effects as the collecting conductive sheet in the prior art, and are not repeated herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic diagram of a connection structure between a collecting conductive sheet and a BMS collecting board according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a first conductive sheet and a connecting conductive sheet according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a second conductive sheet according to an embodiment of the utility model.

Reference numerals illustrate:

1. a first conductive sheet; 2. a second conductive sheet; 3. connecting conductive sheets; 4. a first connection portion; 5. a second connecting portion; 6. a third connecting portion; 7. BMS acquisition board; 701. a groove; 8. a clamping hole; 9. a buckle; 10. a first transition arc; 11. and a second transition arc.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Example 1

This embodiment relates to a collection conducting strip, on the whole constitution, should gather the conducting strip including connecting the conducting strip body between electric core and BMS collection board 7, the conducting strip body has the first conducting strip 1 that links to each other with BMS collection board 7, the second conducting strip 2 that links to each other with the electric core to and connect the connection conducting strip 3 of first conducting strip 1 and second conducting strip 2. The first conducting strip 1 is integrated with the connecting conducting strip 3 and is arranged at an included angle, and the joint of the first conducting strip 1 and the connecting conducting strip 3 is provided with a U-shaped buffer structure which arches out to one side of the thickness direction of the first conducting strip 1, and the buffer structure is used for absorbing and decomposing the stress of the joint of the first conducting strip 1 and the second conducting strip 2 when vibration occurs.

Based on the above overall description, as a preferred embodiment, as shown in fig. 1 to 3, in this embodiment, the buffer structure includes a first connection portion 4 connected to the first conductive sheet 1, a second connection portion 5 integrally connected to the connection conductive sheet 3, and a third connection portion 6 connected between the first connection portion 4 and the second connection portion 5, and all the angles between the first connection portion 4 and the first conductive sheet 1, between the third connection portion 6 and the first connection portion 4, and between the third connection portion 6 and the second connection portion 5 are set. So, can increase the flexibility of conducting strip body and BMS collection board 7, when taking place mechanical vibration or impact, most stress all is absorbed by the contained angle between first connecting portion 4 and the third connecting portion 6 to and the contained angle between second connecting portion 5 and the third connecting portion 6, can not transmit first conducting strip 1 and BMS collection board 7 hookup location, thereby effectively protect BMS collection board 7 and first conducting strip 1 hookup location's integrality.

And as further preferable, as shown in fig. 2, in the present embodiment, the first conductive sheet 1 is disposed perpendicularly to the connection conductive sheet 3, and between the first connection portion 4 and the first conductive sheet 1, between the third connection portion 6 and the first connection portion 4, and between the third connection portion 6 and the second connection portion 5, both are disposed perpendicularly, so that it is possible to provide a good structural strength at the connection position between the first conductive sheet 1 and the connection conductive sheet 3.

Further, in the present embodiment, preferably, the connection position between the first connection portion 4 and the third connection portion 6 and the connection position between the second connection portion 5 and the third connection portion 6 are provided with circular arc transitions, and the transition circular arc between the first connection portion 4 and the third connection portion 6 and the transition circular arc between the second connection portion 5 and the third connection portion 6 are the same in size.

As shown in fig. 2, a first transition arc 10 located on the inner side and a second transition arc 11 located on the outer side are formed at the connection position of the second connection portion 5 and the third connection portion 6, respectively, and preferably, the arc length of the first transition arc 10 is 0.24mm, the chord length is 0.21mm, and the radius is 0.15mm. The arc length of the second transition arc 11 is 0.63mm, the chord length is 0.57mm, and the radius is 0.40mm. The transition arc between the first connecting portion 4 and the third connecting portion 6 may be designed with reference to the transition arc between the second connecting portion 5 and the third connecting portion 6, and will not be described herein.

Of course, the above-mentioned first conductive sheet 1 and the connecting conductive sheet 3 are vertically arranged, or the vertical arrangement between the first connecting portion 4 and the first conductive sheet 1, or between the connecting portions is merely a preferred embodiment, and may be arranged at other angles when implemented, and may be selected according to the space arrangement situation and the requirement of structural strength.

As a preferred arrangement, as shown in fig. 1 and 2, in the present embodiment, the first conductive sheet 1 is connected to the bottom of the BMS collecting plate 7, and the buffer structure is upwardly arched in the thickness direction of the first conductive sheet 1. And as shown in fig. 1, be equipped with the recess 701 that runs through self thickness direction on BMS collection board 7, buffer structure is located recess 701, so be convenient for when this collection conducting strip's the arrangement, through being provided with recess 701 on BMS collection board 7, then the shared space of collection conducting strip of this embodiment is the same with the ordinary conducting strip that does not set up buffer structure occupied space to make the collection conducting strip of this embodiment can not occupy the space of battery package inside more, be favorable to promoting the space utilization of battery package inside. In particular, the first connecting portion 4 is arranged parallel to the bottom of the groove 701, and preferably, in the present embodiment, the distance between the first connecting portion 4 and the bottom of the groove 701 is 0.36mm.

In addition, in order to facilitate connection or disconnection between the battery cell and the BMS collection board 7, it is preferable that the connection conductive sheet 3 in the present embodiment is connected to the second conductive sheet 2 in a clamping manner, so that connection or disconnection between the battery cell and the BMS collection board 7 is facilitated through connection or disconnection between the connection conductive sheet 3 and the second conductive sheet 2.

In the specific implementation, as shown in fig. 2 and 3, the connecting conductive sheet 3 is provided with the buckle 9, and the second conductive sheet 2 is provided with the clamping hole 8, and the buckle 9 is clamped in the clamping hole 8, so that the connection between the second conductive sheet 2 and the connecting conductive sheet 3 can be realized. After the buckle 9 is taken out of the clamping hole 8, the disconnection between the second conducting strip 2 and the connecting conducting strip 3 can be realized. And through the form that is provided with buckle 9 and draw-in hole 8, also make between second conducting strip 2 and the connection conducting strip 3 have great laminating area, avoid because contact area is little to lead to the joint resistance grow and influence the collection precision. When the BMS collecting plate 7 is required to be powered off, the buckle 9 is disconnected with the clamping hole 8, and after the problem of the BMS collecting plate 7 is inspected, the buckle 9 is clamped in the clamping hole 8.

It should be noted that, the collecting conductive sheet in this embodiment is preferably a nickel sheet. Of course, the collecting conductive sheet in this embodiment may be a nickel sheet, or may be another metal with good conductivity, such as an aluminum alloy, a copper alloy, or the like.

The collecting conductive sheet of this embodiment optimizes the structure of the conductive sheet body, and through being equipped with the U type buffer structure that arches to one side of the thickness direction of first conductive sheet 1 in the junction of first conductive sheet 1 and connecting conductive sheet 3, can absorb and decompose the stress of first conductive sheet 1 and the junction of second conductive sheet 2 when taking place the vibration to promote the structural strength of conductive sheet body, prevent that it from taking place the fracture.

Example two

The embodiment relates to a battery module, in which an acquisition conductive sheet in the first embodiment is disposed.

The battery module of this embodiment has the same beneficial effects as the collecting conductive sheet of the first embodiment with respect to the prior art, and will not be described here again.

Example III

The present embodiment relates to a battery pack including the battery module of the second embodiment.

The battery pack of the embodiment and the battery module of the second embodiment have the same beneficial effects as compared with the prior art, and are not described herein.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. An acquisition conducting strip which is characterized in that:

the battery cell comprises a conductive sheet body connected between a battery cell and a BMS acquisition board, wherein the conductive sheet body is provided with a first conductive sheet connected with the BMS acquisition board, a second conductive sheet connected with the battery cell and a connecting conductive sheet connected with the first conductive sheet and the second conductive sheet;

2. The acquisition conducting strip of claim 1, wherein:

the buffer structure comprises a first connecting part connected with the first conducting strip, a second connecting part integrally connected with the connecting conducting strip, and a third connecting part connected between the first connecting part and the second connecting part, wherein the first connecting part is connected with the first conducting strip, the third connecting part is connected with the first connecting part, and the third connecting part is connected with the second connecting part.

3. The acquisition conducting strip of claim 2, wherein:

the first conductive sheet is arranged vertically to the connecting conductive sheet; and/or the number of the groups of groups,

the first connecting part is perpendicular to the first conductive sheet, the third connecting part is perpendicular to the first connecting part, and the third connecting part is perpendicular to the second connecting part.

4. The acquisition conducting strip of claim 1, wherein:

the first conducting strip is connected to the bottom of the BMS acquisition board, and the buffer structure is upwards arched in the thickness direction of the first conducting strip.

5. The acquisition conducting strip of claim 4, wherein:

the BMS acquisition board is provided with a groove penetrating through the thickness direction of the BMS acquisition board, and the buffer structure is located in the groove.

6. The acquisition conducting strip of claim 1, wherein:

the connecting conducting strip is connected with the second conducting strip in a clamping mode.

7. The acquisition conducting strip of claim 6, wherein:

the connecting conductive sheet is provided with a buckle, the second conductive sheet is provided with a clamping hole, and the buckle is clamped in the clamping hole.

8. The collecting conducting strip according to any one of claims 1 to 7, wherein:

the collecting conductive sheet is a nickel sheet.

9. A battery module, characterized in that:

the battery module is provided with the collecting conductive sheet according to any one of claims 1 to 8.

10. A battery pack, characterized in that:

comprising the battery module according to claim 9.