Battery pack and power device

Abstract

The utility model discloses a battery pack and a power plant, the battery pack comprises: a housing, which is provided with an accommodating cavity and is internally provided with a cross beam; an insulating plate is arranged at one end of the battery module, and the insulating plate and the cross beam are arranged at an interval; and the elastic piece is arranged between the insulating plate and the cross beam, and the elastic piece always has a force for abutting between the insulating plate and the cross beam. According to the battery pack disclosed by the utility model, the elastic piece is arranged, and the elastic piece elastically deforms to absorb the position tolerance when the battery module enters a box, so that the expansion space, close to the battery pack cross beam, of the end part of the battery module is zero, and the expansion force of the battery module in the later cycle period is reduced, thereby prolonging the cycle life of the battery pack.

Description

Technical Field

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

[0002] The relevant technology points out that for existing battery packs that use blade cells, when the assembled modules are put into the box, in order to ensure that the modules can be grabbed by a robot for automatic boxing, a certain gap needs to be reserved between the insulating sheet at the end of the module and the crossbeam of the battery pack, generally 2 to 4 mm. The gap between the insulating sheet at the end of the module and the crossbeam of the battery pack is relatively large, resulting in a large expansion space (generally greater than 2 mm) for the cells at the end of the module close to the crossbeam of the battery pack. However, for iron-lithium cells, the smaller the expansion space (air gap) of the large surface of the cell, the higher the cycle life of the cell. If the expansion space (air gap) of the cell at the end of the module close to the crossbeam of the battery pack is greater than 2 mm, it will have a certain impact on the cycle life of the cell, reducing the cycle life of the cell. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery pack with a simple structure and ingenious design.

[0004] The utility model also provides a power device having the battery pack.

[0005] The battery pack according to the first aspect of the utility model includes: a shell, the shell forms a accommodating cavity, and the shell has a cross beam; a battery module, one end of the battery module is provided with an insulating plate, and the insulating plate and the cross beam are spaced apart; an elastic member, the elastic member is arranged between the insulating plate and the cross beam, and the elastic member always has a force abutting between the insulating plate and the cross beam.

[0006] According to the battery pack of the present invention, an elastic member is provided, which undergoes elastic deformation to absorb the position tolerance of the battery module when it is put into the box, thereby ensuring that the expansion space at the end of the battery module near the battery pack cross beam is zero, reducing the expansion force of the battery module in the later stage of the cycle, and thus improving the cycle life of the battery pack.

[0007] In some embodiments, the elastic member includes at least two plates, and the at least two plates are connected in sequence. Every two plates are arranged at an angle, and every two adjacent angles are internally staggered angles.

[0008] In some embodiments, a limiting groove is formed on the crossbeam, the limiting groove is recessed in a thickness direction of the crossbeam, and one end of the elastic member extends into the limiting groove.

[0009] In some embodiments, a cavity is formed in the beam, and a reinforcing rib is formed in the cavity.

[0010] In some embodiments, the reinforcing rib includes: a first rib and a second rib, wherein the first rib extends in a vertical direction and is connected to a top wall and a bottom wall of the cavity, and the second rib is connected to the first rib and a side wall of the cavity.

[0011] In some embodiments, the second rib extends obliquely downward in a direction from the sidewall of the cavity toward the first rib, and / or the second rib extends obliquely upward in a direction from the sidewall of the cavity toward the first rib.

[0012] In some embodiments, the depth of the limiting groove is in the range of 0.5 mm-1 mm.

[0013] In some embodiments, the plate has a thickness in the range of 0.5 mm to 1.5 mm, and / or the plate is formed as a spring steel piece.

[0014] In some embodiments, the thickness of the insulating board is not less than 6 mm, and / or the insulating board is an epoxy board.

[0015] The power device according to the second aspect of the utility model comprises the battery pack according to the first aspect of the utility model.

[0016] According to the power device of the utility model, by providing the battery pack of the first aspect, the overall performance of the power device is improved, the safety performance of the power device is enhanced, and the maintenance cost of the power device is reduced.

[0017] 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

[0018] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of another perspective of the battery pack shown in ;

[0020] Figure 3 yes Figure 2 Schematic diagram of the AA section shown in;

[0021] Figure 4 yes Figure 3 The enlarged schematic diagram of point B shown in FIG.

[0022] Figure 5 yes Figure 1A schematic diagram of the elastic member shown in ;

[0023] Figure 6 yes Figure 5 Schematic diagram of another perspective of the elastic member shown in .

[0024] Reference numerals:

[0025] 100. Battery pack; 1. Shell; 11. Crossbeam; 111. Reinforcing rib; 1111. First rib; 1112. Second rib; 112. Limiting groove; 2. Battery module; 3. Elastic member; 31. Plate; 4. Insulating plate. DETAILED DESCRIPTION

[0026] 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.

[0027] Reference below Figure 1-Figure 6 A battery pack 100 according to an embodiment of the first aspect of the present invention is described.

[0028] like Figure 1 As shown, the battery pack 100 according to the first embodiment of the utility model includes: a shell 1, a battery module 2 and an elastic member 3.

[0029] Specifically, the housing 1 is formed with a receiving cavity, the housing 1 has a cross beam 11, one end of the battery module 2 is provided with an insulating plate 4, the insulating plate 4 and the cross beam 11 are spaced apart, the elastic member 3 is provided between the insulating plate 4 and the cross beam 11, and the elastic member 3 always has a force abutting between the insulating plate 4 and the cross beam 11. Therefore, the battery pack 100 has a simple structure and an ingenious design.

[0030] According to the battery pack 100 of the embodiment of the utility model, by providing an elastic member 3, the elastic member 3 undergoes elastic deformation to absorb the position tolerance of the battery module 2 when it is put into the box, thereby ensuring that the expansion space at the end of the battery module 2 close to the cross beam 11 of the battery pack 100 is zero, reducing the expansion force of the battery module 2 in the later stage of the cycle, thereby improving the cycle life of the battery pack 100.

[0031] In some embodiments of the present invention, the elastic member 3 includes at least two plates 31, at least two plates 31 are connected in sequence, each two plates 31 are arranged at an angle, and each two adjacent angles are internal staggered angles. In other words, the elastic member 3 can be V-shaped, N-shaped, W-shaped, M-shaped, etc. Figure 5 and Figure 6As shown, the elastic member 3 is W-shaped. Therefore, when the elastic member 3 is subjected to an external force, it undergoes elastic deformation to absorb the assembly position tolerance of the battery module 2 .

[0032] Furthermore, one end face of the elastic member 3 extends vertically and completely fits the surface of the insulating plate 4, and the other end face of the elastic member 3 extends obliquely upward from the insulating plate 4 toward the cross beam 11. Thus, the elastic member 3 is conveniently placed between the insulating plate 4 and the cross beam 11.

[0033] Furthermore, the connection between the plates 31 is smoothly transitioned.

[0034] In some embodiments of the utility model, a limiting groove 112 is formed on the crossbeam 11, the limiting groove 112 is recessed in the thickness direction of the crossbeam 11, and one end of the elastic member 3 extends into the limiting groove 112. Therefore, the setting of the limiting groove 112 can effectively prevent the elastic member 3 from moving upward, and prevent the elastic member 3 from moving upward and falling off under the action of vibration or impact force of the battery pack 100.

[0035] In some embodiments of the present invention, a cavity is formed in the cross beam 11, and a reinforcing rib 111 is formed in the cavity. Thus, the structural strength of the cross beam 11 is improved, and the assembly position tolerance of the battery module 2 can be further absorbed.

[0036] In some embodiments of the present invention, Figure 4 As shown, the reinforcing rib 111 includes: a first rib 1111 and a second rib 1112. The first rib 1111 extends in the vertical direction and is connected to the top wall and the bottom wall of the cavity, and the second rib 1112 is connected to the first rib 1111 and the side wall of the cavity. The second rib 1112 extends obliquely downward from the side wall of the cavity toward the first rib 1111, and / or the second rib 1112 extends obliquely upward from the side wall of the cavity toward the first rib 1111. Therefore, the reinforcing rib 111 is arranged inside the crossbeam 11, which further improves the ability to absorb the expansion force of the battery cell in the later stage of the cycle and prolongs the cycle life of the battery cell.

[0037] For example, as shown in the figure, the reinforcing rib 111 is in a fishbone shape as a whole.

[0038] In some embodiments of the present invention, the depth of the limiting groove 112 is in the range of 0.5 mm-1 mm. For example, the depth of the limiting groove 112 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc.

[0039] In some embodiments of the present invention, the thickness of the plate body 31 is in the range of 0.5 mm-1.5 mm, and / or the plate body 31 is formed as a spring steel member. For example, the thickness of the plate body 31 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, etc.

[0040] Specifically, the elastic member 3 is made by bending spring steel with a thickness of 0.5 mm-1.5 mm.

[0041] In some embodiments of the present invention, the thickness of the insulating plate 4 is not less than 6 mm, and / or the insulating plate 4 is an epoxy plate. For example, the thickness of the insulating plate 4 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, etc.

[0042] Preferably, the insulating plate 4 is made of a high modulus and high strength epoxy plate, thereby providing sufficient support for the battery module 2 .

[0043] The following will refer to Figure 1-Figure 6 The assembly process of the battery pack 100 according to a specific embodiment of the present invention is described.

[0044] The robot grabs the battery module 2 and installs it into the shell 1. After the battery module 2 is installed into the shell 1, the elastic member 3 is installed manually or by the robot, and the elastic member 3 is pressed between the beam 11 and the insulating plate 4. One end of the elastic member 3 extends into the limiting groove 112 to complete the installation.

[0045] The power device according to the embodiment of the second aspect of the utility model includes the battery pack 100 according to the embodiment of the first aspect of the utility model.

[0046] According to the power device of the embodiment of the utility model, by providing the battery pack 100 of the first embodiment, the overall performance of the power device is improved, the safety performance of the power device is enhanced, and the maintenance cost of the power device is reduced.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 pack (100), characterized in that: include: A housing (1), the housing (1) being formed with a receiving cavity, and the housing (1) having a crossbeam (11) therein; A battery module (2), wherein an insulating plate (4) is provided at one end of the battery module (2), and the insulating plate (4) is spaced apart from the crossbeam (11); An elastic member (3), wherein the elastic member (3) is arranged between the insulating plate (4) and the cross beam (11), and the elastic member (3) always has a force abutting between the insulating plate (4) and the cross beam (11).

2. The battery pack (100) according to claim 1, characterized in that: The elastic member (3) comprises at least two plates (31), the at least two plates (31) are connected in sequence, each two plates (31) are arranged at an angle, and each two adjacent angles are internally staggered angles.

3. The battery pack (100) according to claim 2, characterized in that: A limiting groove (112) is formed on the cross beam (11), the limiting groove (112) is recessed in the thickness direction of the cross beam (11), and one end of the elastic member (3) extends into the limiting groove (112).

4. The battery pack (100) according to claim 3, characterized in that: A cavity is formed in the crossbeam (11), and a reinforcing rib (111) is formed in the cavity.

5. The battery pack (100) according to claim 4, characterized in that: The reinforcing rib (111) comprises: a first rib (1111) and a second rib (1112), wherein the first rib (1111) extends in a vertical direction and is connected to the top wall and the bottom wall of the cavity, and the second rib (1112) is connected to the first rib (1111) and the side wall of the cavity.

6. The battery pack (100) according to claim 5, characterized in that: The second rib (1112) extends obliquely downward in a direction from the side wall of the cavity toward the first rib (1111), and / or the second rib (1112) extends obliquely upward in a direction from the side wall of the cavity toward the first rib (1111).

7. The battery pack (100) according to claim 3, characterized in that: The depth of the limiting groove (112) is in the range of 0.5 mm to 1 mm.

8. The battery pack (100) according to claim 2, characterized in that: The thickness of the plate body (31) is in the range of 0.5 mm to 1.5 mm, and / or the plate body (31) is formed as a spring steel piece.

9. The battery pack (100) according to any one of claims 1 to 8, characterized in that: The thickness of the insulating plate (4) is not less than 6 mm, and / or the insulating plate (4) is an epoxy plate.

10. A power device, characterized in that: A battery pack (100) comprising any one of claims 1 to 9.

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