Battery module, battery pack and power device

Abstract

The utility model discloses a battery module, a battery pack and a power device, the battery module comprises a plurality of single batteries which are arranged in a stacking manner; the bus bar assembly comprises a bus bar bracket, and the bus bar bracket extends along the stacking direction of the battery cells; and the flexible circuit board is arranged between the busbar bracket and the battery monomers. According to the battery module disclosed by the utility model, the flexible circuit board is arranged between the busbar bracket and the battery monomers (namely, the flexible circuit board is arranged below the busbar bracket), so that the structure of the battery module is simplified, the production cost of the battery module is reduced, the production period of the battery module is shortened, and the applicability of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery module, a battery pack and a power device. Background Art

[0002] It is pointed out in the relevant technology that if the FPC flexible circuit board is used for module sampling in the current battery pack, in order to securely fix and protect the FPC, most of the time a blister bracket or a solution similar to a blister bracket is used to place the FPC on top of the bracket. In this way, the FPC can be isolated from the battery cell, and then the FPC is fixed to the bracket by hot rivets, rivets or adhesives to facilitate the welding of the FPC nickel sheet, ensuring that the FPC does not fall off or shake.

[0003] The existing solution of fixing the FPC on the top of the blister bracket has the following disadvantages: ① Whether it is a blister bracket or an injection molded bracket, the production of the bracket requires a mold, which will incur certain mold costs. The bracket produced by the mold requires a relatively long cycle, which wastes time; ② The design of this type of bracket will be limited by the space limitation of the height difference between the module bus and the surface of the battery cell. If the space is too small, the thickness of the bracket may not be sufficient. If the space is too large, additional products may need to be added under the bracket and the battery cover for support. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery module with low production cost and high assembly efficiency.

[0005] The utility model also provides a battery pack having the battery module.

[0006] The utility model also provides a power device having the battery pack.

[0007] According to the first aspect of the utility model, the battery module comprises: a plurality of battery cells, the plurality of battery cells are stacked and arranged; a bus assembly, the bus assembly comprises a bus bracket, the bus bracket extends along the stacking direction of the battery cells; and a flexible circuit board, the flexible circuit board is arranged between the bus bracket and the battery cells.

[0008] According to the battery module of the utility model, by arranging the flexible circuit board between the bus bracket and the battery cell (that is, arranging the flexible circuit board below the bus bracket), the structure of the battery module is simplified, the production cost of the battery module is reduced, the production cycle of the battery module is shortened, and the applicability of the battery module is increased.

[0009] In some embodiments, the battery cell has a top cover, one side surface of the flexible circuit board is connected to the top cover, and the other side surface of the flexible circuit board is connected to the busbar bracket.

[0010] In some embodiments, the flexible circuit board includes a temperature sensor and a temperature sensing bracket, and the temperature sensor is fixed to the top cover through the temperature sensing bracket.

[0011] In some embodiments, the flexible circuit board is connected to the top cover via foam, and the flexible circuit board is connected to the bus bracket via double-sided tape, and / or the flexible circuit board is connected to the bus bracket via riveting.

[0012] In some embodiments, the busbar assembly includes a busbar body, and the battery module further includes: a reinforcement plate, which is connected to an end of the flexible circuit board and is riveted to the busbar body.

[0013] In some embodiments, the reinforcing plate is connected to the top cover via foam.

[0014] In some embodiments, the battery module further includes: a connecting piece, which is connected between the bus body and the flexible circuit board and is electrically connected to both the bus body and the flexible circuit board.

[0015] In some embodiments, the busbar support is formed as a polycarbonate piece.

[0016] A battery pack according to a second aspect of the present invention comprises a battery module according to the first aspect of the present invention.

[0017] According to the battery pack of the utility model, by providing the battery module of the first aspect, the safety performance of the battery pack is improved, the production cost of the battery pack is reduced, and the production cycle of the battery pack is shortened.

[0018] The power device according to the third aspect of the utility model comprises the battery pack according to the second aspect of the utility model.

[0019] According to the power device of the utility model, by providing the battery pack of the second aspect, the overall performance of the power device is improved and the production cost of the power device is reduced.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1is a schematic diagram of a battery module according to an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of the rear view of the battery module shown in .

[0023] Reference numerals:

[0024] 100. Battery module;

[0025] 1. Busbar bracket; 2. Busbar body;

[0026] 3. Flexible circuit board; 31. Temperature sensor; 32. Temperature sensing bracket;

[0027] 4. Reinforcement plate; 5. Connecting piece;

[0028] 6. Double-sided tape; 7. Foam; 8. Cover. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Reference below Figure 1 and Figure 2 A battery module 100 according to an embodiment of the first aspect of the present invention is described.

[0031] like Figure 1 As shown, the battery module 100 according to the first embodiment of the utility model includes: a battery cell, a bus bar assembly and a flexible circuit board 3.

[0032] Specifically, a plurality of battery cells are stacked, the busbar assembly includes a busbar bracket 1, the busbar bracket 1 extends along the stacking direction of the battery cells, and the flexible circuit board 3 is arranged between the busbar bracket 1 and the battery cells. Therefore, the battery module 100 has a simple structural design and low production cost.

[0033] According to the battery module 100 of the embodiment of the utility model, by arranging the flexible circuit board 3 between the bus bracket 1 and the battery cell (that is, arranging the flexible circuit board 3 below the bus bracket 1), the structure of the battery module 100 is simplified, the production cost of the battery module 100 is reduced, the production cycle of the battery module 100 is shortened, and the applicability of the battery module 100 is increased.

[0034] Furthermore, the busbar support 1 is disposed on the cover 8 .

[0035] In some embodiments of the present invention, the battery cell has a top cover, one side surface of the flexible circuit board 3 is connected to the top cover, and the other side surface of the flexible circuit board 3 is connected to the busbar bracket 1. As a result, the structure of the battery module 100 is simple, and the assembly method of the battery module 100 is simple, which improves the production efficiency of the battery module 100.

[0036] In some embodiments of the present invention, as shown in the figure, the flexible circuit board 3 includes a temperature sensor 31 and a temperature sensing bracket 32, and the temperature sensor 31 is fixed to the top cover through the temperature sensing bracket 32. Therefore, the structure design of the flexible circuit board 3 is ingenious and easy to install.

[0037] In some embodiments of the utility model, the flexible circuit board 3 is connected to the top cover by foam 7, and the flexible circuit board 3 is connected to the bus bracket 1 by double-sided adhesive 6, and / or the flexible circuit board 3 is connected to the bus bracket 1 by riveting. In other words, the flexible circuit board 3 and the bus bracket 1 can be connected by bonding with double-sided adhesive 6, the flexible circuit board 3 and the bus bracket 1 can also be connected by hot riveting or expansion rivets, and the flexible circuit board 3 and the bus bracket 1 can also be embedded in the flexible circuit board 3. Therefore, the connection method between the flexible circuit board 3, the bus bracket 1 and the top cover is simple, which simplifies the production steps and reduces the production cost.

[0038] In some embodiments of the present invention, the busbar assembly includes a busbar body 2, and the battery module 100 further includes a reinforcing plate 4, which is connected to the end of the flexible circuit board 3 and is riveted to the busbar body 2. Therefore, the reinforcing plate 4 and the busbar body 2 have a simple connection process and a reliable connection, are light in weight, and have good corrosion resistance.

[0039] Since the foam 7 is elastic, light, fast, pressure-sensitive, easy to use, flexible, ultra-thin, and reliable in performance, the reinforcing plate 4 is connected to the top cover through the foam 7 .

[0040] In some embodiments of the present invention, the battery module 100 further includes: a connecting sheet 5, which is connected between the busbar body 2 and the flexible circuit board 3, and is electrically connected to both the busbar body 2 and the flexible circuit board 3. Preferably, the connecting sheet 5 is a nickel sheet.

[0041] Since polycarbonate has good heat resistance, impact resistance, flame retardancy and excellent mechanical properties, the busbar holder 1 is formed as a polycarbonate member.

[0042] The battery pack according to the second embodiment of the present invention includes the battery module 100 according to the first embodiment of the present invention.

[0043] According to the battery pack of the embodiment of the utility model, by providing the battery module 100 of the first embodiment, the safety performance of the battery pack is improved, the production cost of the battery pack is reduced, and the production cycle of the battery pack is shortened.

[0044] The power device according to the embodiment of the third aspect of the utility model includes the battery pack according to the embodiment of the second aspect of the utility model.

[0045] According to the power device of the embodiment of the utility model, the battery pack of the above-mentioned second aspect embodiment is provided, thereby improving the overall performance of the power device and reducing the production cost of the power device.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are stacked and arranged; A busbar assembly, the busbar assembly comprising a busbar bracket, the busbar bracket extending along the stacking direction of the battery cells; A flexible circuit board is arranged between the busbar support and the battery cell.

2. The battery module according to claim 1, characterized in that: The battery cell has a top cover, one side surface of the flexible circuit board is connected to the top cover, and the other side surface of the flexible circuit board is connected to the busbar bracket.

3. The battery module according to claim 2, characterized in that: The flexible circuit board comprises a temperature sensor and a temperature sensing bracket, and the temperature sensor is fixed on the top cover through the temperature sensing bracket.

4. The battery module according to claim 2, characterized in that: The flexible circuit board is connected to the top cover via foam, and the flexible circuit board is connected to the bus bracket via double-sided tape, and / or the flexible circuit board is connected to the bus bracket via riveting.

5. The battery module according to claim 2, characterized in that: The busbar assembly includes a busbar body, and the battery module further includes a reinforcing plate, which is connected to the end of the flexible circuit board and is riveted to the busbar body.

6. The battery module according to claim 5, characterized in that: The reinforcing plate is connected to the top cover via foam.

7. The battery module according to claim 6, characterized in that: Also includes: A connecting piece is connected between the bus body and the flexible circuit board, and is electrically connected to both the bus body and the flexible circuit board.

8. The battery module according to any one of claims 1 to 7, characterized in that: The busbar holder is formed as a polycarbonate part.

9. A battery pack, characterized in that: A battery module comprising any one of claims 1-8.

10. A power device, characterized in that: A battery pack comprising the battery pack of claim 9.

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