Battery module

Abstract

The invention discloses a battery module, which comprises a battery cell group, the battery management system is positioned on the side surface of one end of the battery cell group and is fixedly connected with the battery cell group; the flexible circuit board is positioned at the top of the battery cell group and extends along the length direction of the battery cell group, and a plug electrically connected with a battery management system is arranged at one end of the flexible circuit board; a plurality of L-shaped connecting pieces are arranged on the two sides of the flexible circuit board at intervals, and each connecting piece comprises a first section which extends in the length direction of the battery cell group and is located in the edge of the flexible circuit board, and a second section which extends out of the edge of the flexible circuit board in the width direction of the battery cell group; and a gap is formed between the first section and the flexible circuit board. Compared with the prior art, the flexible circuit board is directly connected with the corresponding socket of the battery management system in an inserted mode through the plug, wire harness collection is omitted, wire harness switching is reduced, the risk of collection loss is reduced, the connection reliability and the collection stability are improved, the manufacturing efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a battery module. Background Art

[0002] In traditional commercial vehicle power battery modules, a BMS (battery management system) is usually used to collect data from multiple modules. The cell data is collected through a wiring harness or FPC (flexible circuit board) or PCB (printed circuit board). The wiring harness or FPC or PCB output terminal is connected to the BMS through the wiring harness.

[0003] The disadvantages of this battery module are: poor connection reliability and data collection stability. Secondly, the wiring harness inside the battery box is complicated, resulting in low manufacturing efficiency and high production costs. Summary of the invention

[0004] The present invention provides a battery module to solve the technical problems of poor connection reliability and data collection stability of the existing battery module.

[0005] To achieve the above object, the present invention adopts the following technical solution.

[0006] A battery module, comprising:

[0007] Battery cell group;

[0008] A battery management system, located on a side of one end of the battery cell group and fixedly connected to the battery cell group; and

[0009] A flexible circuit board, located on the top of the battery cell group, extending along the length direction of the battery cell group, and having one end provided with a plug for electrically connecting to the battery management system;

[0010] A plurality of L-shaped connecting pieces are provided at intervals on both sides of the flexible circuit board, wherein the connecting piece includes a first section extending along the length direction of the battery cell group and located within the edge of the flexible circuit board, and a second section extending along the width direction of the battery cell group to outside the edge of the flexible circuit board;

[0011] There is a gap between the first section and the flexible circuit board;

[0012] One end of the first section is electrically connected to the flexible circuit board, and the other end of the first section is electrically connected to one end of the second section, and the other end of the second section is electrically connected to the battery cell group.

[0013] In some embodiments, the other end of the second segment is electrically connected to a nickel sheet, the nickel sheet is electrically connected to an aluminum bar, and the aluminum bar is electrically connected to the battery cell group.

[0014] In some embodiments, a temperature sensing probe is also included, wherein a collection end of the temperature sensing probe is bonded to the aluminum bar by thermally conductive glue, and a data transmission end is electrically connected to the flexible circuit board.

[0015] The present invention has at least the following technical effects or advantages: the flexible circuit board is directly connected to the corresponding socket of the battery management system through a plug, the acquisition harness is eliminated, and the harness switching is reduced, which not only reduces the risk of acquisition loss, increases the reliability of the connection and the stability of the acquisition, but also improves the manufacturing efficiency and reduces the production cost. Secondly, the unique design of the connecting piece can improve the welding accuracy, ensure the welding consistency, and facilitate automation. At the same time, the gap between the connecting piece and the flexible circuit board can also offset the stress conducted by the nickel sheet during the vibration process, thereby improving the reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a battery module in one embodiment of the present invention;

[0017] Figure 2 for Figure 1 A top view of

[0018] Figure 3 This is a schematic diagram of the structure of a flexible circuit board in one embodiment of the present invention;

[0019] Figure 4 Schematic diagram of the structure of a connecting piece in one embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] See also Figure 1-Figure 4 A battery module includes a battery cell group 1, a battery management system 2 and a flexible circuit board 3.

[0022] in:

[0023] The battery management system 2 is fixedly mounted on the side of one end of the battery cell group 1 by means of screws.

[0024] The flexible circuit board 3 is located on the top of the battery pack 1 and extends along the length direction of the battery pack 1. A plug 31 for electrically connecting to the battery management system 2 is provided at one end of the flexible circuit board 3. That is, the flexible circuit board 3 is a direct plug-in flexible circuit board.

[0025] A plurality of L-shaped connecting pieces 4 are provided at intervals on both sides of the flexible circuit board 3. The connecting piece 4 includes a first section 41 extending along the length direction of the battery cell group 1 and located within the edge of the flexible circuit board 3, and a second section 41 extending along the width direction of the battery cell group 1 to outside the edge of the flexible circuit board 3. A gap 51 is provided between the first section 41 and the flexible circuit board 3.

[0026] One end of the first section 41 is electrically connected to the flexible circuit board 3 , and the other end is electrically connected to one end of the second section 42 . The other end of the second section 42 is electrically connected to the nickel sheet 5 . The nickel sheet 5 is electrically connected to the aluminum bar 6 . The aluminum bar 6 is electrically connected to the battery cell group 1 .

[0027] Preferably, the nickel sheet 5 is welded to the aluminum bar 6 through plum blossom point welding, and the horizontal peeling force and the vertical shearing force are set so that the tensile test of the nickel sheet 5 is within a specified range to ensure its welding reliability.

[0028] Preferably, a temperature sensing probe 7 is further included, the collection end of the temperature sensing probe 7 is bonded to the aluminum bar 6 by heat-conducting glue, and the data transmission end is electrically connected to the flexible circuit board 3.

[0029] Preferably, the temperature sensing probe 7 is an NTC thermistor, which is first adhered to the aluminum bar 6 with thermal double-sided tape for pre-fixation, and then coated with thermal conductive glue (but not limited to thermal conductive glue, it can be thermal conductive silicone grease, thermal conductive phase change material, etc.) until the temperature sensing probe is completely covered to ensure the stability of system temperature collection during the life cycle.

[0030] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0031] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0032] Those skilled in the art will appreciate that the modules or units or groups of the devices in the examples disclosed herein may be arranged in the device as described in the embodiment, or alternatively may be located in one or more devices different from the devices in the example. The modules in the foregoing examples may be combined into one module or may be divided into multiple submodules.

[0033] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or groups in the embodiments may be combined into one module or unit or group, and in addition they may be divided into a plurality of submodules or subunits or subgroups. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0034] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

[0035] In addition, some of the embodiments are described herein as methods or combinations of method elements that can be implemented by a processor of a computer system or by other devices that perform the functions. Therefore, a processor with necessary instructions for implementing the method or method elements forms a device for implementing the method or method elements. In addition, the elements described herein of the device embodiments are examples of devices for implementing the functions performed by the elements for the purpose of implementing the invention.

[0036] As used herein, unless otherwise specified, the use of ordinal numbers "first," "second," "third," etc. to describe common objects merely indicates that different instances of similar objects are involved, and is not intended to imply that the objects so described must have a given order in time, space, order, or in any other manner.

[0037] Although the present invention has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the invention thus described. In addition, it should be noted that the language used in this specification is selected primarily for readability and teaching purposes, rather than for explaining or defining the subject matter of the present invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is illustrative, not restrictive, with respect to the scope of the present invention, which is defined by the appended claims.

[0038] Finally, it should be noted that the present invention does not explain in detail the common knowledge recognized by technicians in this field. The above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module, characterized in that: include: Battery cell group; A battery management system is located on the side of one end of the battery cell group and is fixedly connected to the battery cell group; and A flexible circuit board, located on the top of the battery cell group, extending along the length direction of the battery cell group, and having one end provided with a plug for electrically connecting to the battery management system; A plurality of L-shaped connecting pieces are provided at intervals on both sides of the flexible circuit board, wherein the connecting piece includes a first section extending along the length direction of the battery cell group and located within the edge of the flexible circuit board, and a second section extending along the width direction of the battery cell group to outside the edge of the flexible circuit board; There is a gap between the first section and the flexible circuit board; One end of the first section is electrically connected to the flexible circuit board, and the other end of the first section is electrically connected to one end of the second section, and the other end of the second section is electrically connected to the battery cell group.

2. The battery module according to claim 1, characterized in that: The other end of the second section is electrically connected to the nickel sheet, the nickel sheet is electrically connected to the aluminum bar, and the aluminum bar is electrically connected to the battery cell group.

3. The battery module according to claim 2, characterized in that: It also includes a temperature sensing probe, a collection end of which is bonded to the aluminum bar by heat-conducting glue, and a data transmission end is electrically connected to the flexible circuit board.

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