Battery module and battery pack

Abstract

The utility model relates to the technical field of new energy batteries, and discloses a battery module and a battery pack, the battery module has a first direction, a second direction and a third direction which are intersected pairwise, and the battery module comprises a plurality of battery cells which are arranged along the second direction; the frame comprises a first side plate, a second side plate, a first end plate and a second end plate, a containing cavity is defined by the first side plate, the second side plate, the first end plate and the second end plate, and the battery cell is arranged in the containing cavity; the first side plate and the second side plate each comprise a plate body and a reinforcing rib, the reinforcing ribs extend in the second direction, and the two ends of each reinforcing rib are connected with the first end plate and the second end plate correspondingly. The first side plate, the second side plate, the first end plate and the second end plate of the frame are connected through the reinforcing ribs, and the reinforcing ribs can improve the structural strength of the first side plate and the second side plate, so that the overall rigidity of the frame and the protection effect on the battery cell are improved, the battery cell is firmly fixed, and the service life of the battery cell is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field especially relates to a battery module and battery pack. BACKGROUND

[0002] In recent years, with the continuous development of new energy vehicles, power battery as the power source of new energy vehicles is widely used in new energy vehicles. The manufacturing cost of battery pack directly affects the cost of the whole vehicle. In the use process of the vehicle, the battery pack with the module structure is more convenient for maintenance and recycling, and is widely used in the existing vehicle.

[0003] The battery module includes a cell and a frame, the cell is arranged inside the frame, the frame is used for fixing the cell, the frame of the existing battery module is mostly made of plastic material to reduce the weight of the battery module, but the connection strength of the frame made of plastic material is not enough, which affects the service life of the cell. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a battery module to improve the strength of the frame and prolong the service life of the cell, and further provides a battery pack using the battery module.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a battery module, the battery module has first direction, second direction and third direction which intersect with each other, and the battery module comprises:

[0006] a cell, the cell has a plurality of cells, and each cell is arranged along the second direction;

[0007] a frame, the frame comprises a first side plate, a second side plate, a first end plate and a second end plate, the first side plate and the second side plate are spaced apart along the first direction, the first end plate and the second end plate are spaced apart along the second direction, the first side plate, the second side plate, the first end plate and the second end plate form a containing cavity, and the cell is arranged in the containing cavity.

[0008] The first side plate and the second side plate both comprise a plate body and a reinforcing rib fixedly assembled with the plate body, the reinforcing rib extends along the second direction, and the two ends of the reinforcing rib are connected with the first end plate and the second end plate respectively.

[0009] Preferably, the reinforcing rib has a first plug and a second plug beyond the plate body, the first plug and the second plug are respectively located at the two ends of the reinforcing rib along the second direction, the first end plate and the second end plate are provided with plug slots respectively close to the plate surface of the plate body, and the first plug and the second plug are respectively inserted and assembled with the plug slots.

[0010] Preferably, the reinforcing rib has a first plug and a second plug beyond the plate body, the first plug and the second plug are respectively located at two ends of the reinforcing rib along the second direction, and the first plug and the second plug are respectively fastened and assembled with the first end plate and the second end plate.

[0011] Preferably, the plate body is an injection molding part, and the reinforcing rib is a steel plate part, and the plate body and the reinforcing rib are integrally injection molded.

[0012] Preferably, the frame further comprises a partition plate, the partition plate is connected with the plate body, a plurality of partition plates are spaced apart along the second direction, and a slot for embedding the battery cell is formed between adjacent two partition plates.

[0013] Preferably, along the first direction, the size of the partition plate is smaller than the size of the end plate.

[0014] Preferably, the first side plate and the second side plate each comprise at least two reinforcing ribs, and each reinforcing rib is spaced apart along the third direction.

[0015] Preferably, the battery module further comprises a cable tie, and the cable tie is arranged in a closed structure around the first side plate, the first end plate, the second side plate and the second end plate.

[0016] Preferably, the side away from the accommodating cavity of the first side plate, the first end plate, the second side plate and the second end plate is provided with an assembly groove, and the cable tie is embedded in the assembly groove.

[0017] The utility model further provides a battery pack comprising the battery module of any one of the above technical solutions.

[0018] Compared with the prior art, the first side plate and the second side plate of the frame are formed by the plate body and the reinforcing rib, the reinforcing rib is connected with the first end plate and the second end plate, the first side plate, the second side plate, the first end plate and the second end plate of the frame are connected through the reinforcing rib, the reinforcing rib can improve the structural strength of the first side plate and the second side plate, thereby improving the overall rigidity of the frame and the protection effect on the battery cell, the battery cell is fixed firmly, and the service life of the battery cell is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the battery module of the utility model;

[0020] Figure 2 is Figure 1 an explosion schematic view of the battery module of

[0021] Figure 3 is Figure 1A schematic diagram of the structure of the second side plate of the battery module;

[0022] Figure 4 yes Figure 3 Front view of the second side panel;

[0023] Figure 5 This is a schematic diagram of the arrangement of two sets of reinforcing ribs in the battery module of this utility model;

[0024] Figure 6 This is a schematic diagram of the arrangement of two sets of cable ties in the battery module of this utility model.

[0025] In the diagram, 1 is the battery cell, 2 is the frame, 3 is the first side plate, 4 is the second side plate, 5 is the first end plate, 6 is the second end plate, 7 is the plate body, 8 is the reinforcing rib, 81 is the first plug, 82 is the second plug, 9 is the slot, 10 is the partition, 11 is the groove, 12 is the cable tie, 13 is the assembly groove, 14 is the bolt, 15 is the receiving cavity, X is the first direction, Y is the second direction, and Z is the third direction. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] A preferred embodiment of the battery module of this utility model is as follows: Figures 1 to 6 As shown, the battery module has a first direction X, a second direction Y, and a third direction Z that intersect each other. Specifically, in this embodiment, the first direction X is the length direction of the battery module, the second direction Y is the width direction of the battery module, and the third direction Z is the height direction of the battery module.

[0028] The battery module includes battery cells 1 and a frame 2. There are multiple battery cells 1, which are arranged along a second direction Y. The thickness direction of the battery cells 1 is the same as the second direction Y of the battery module, and the width direction of the battery cells 1 is the same as the first direction X of the battery module. The frame 2 fixes and limits the battery cells 1, so that the battery cells 1 are securely fixed together.

[0029] The frame 2 includes a first side plate 3, a second side plate 4, a first end plate 5, and a second end plate 6. The first side plate 3 and the second side plate 4 are parallel and spaced apart along a first direction X. The first end plate 5 and the second end plate 6 are parallel and spaced apart along a second direction Y. The first side plate 3, the second side plate 4, the first end plate 5, and the second end plate 6 form a receiving cavity 15. The battery cell 1 is arranged in the receiving cavity 15, and the receiving cavity 15 provides protection for the battery cell 1.

[0030] The first side plate 3 and the second side plate 4 each include a plate body 7 and a reinforcing rib 8, the reinforcing rib 8 is fixedly assembled with the plate body 7, the reinforcing rib 8 extends along the second direction Y, and two ends of the reinforcing rib 8 are connected with the first end plate 5 and the second end plate 6 respectively. In the embodiment, the reinforcing rib 8 is integrally injection molded with the plate body 7, and the reinforcing rib 8 is additionally arranged in the plate body 7, so that the structural strength of the first side plate 3 and the second side plate 4 is increased, and the structural strength of the entire frame 2 is further increased.

[0031] The first side plate 3 and the second side plate 4 of the frame 2 of the battery module are each formed by a plate body 7 and a reinforcing rib 8, the reinforcing rib 8 is connected with the first end plate 5 and the second end plate 6, and the first side plate 3, the second side plate 4, the first end plate 5 and the second end plate 6 of the frame 2 are connected through the reinforcing rib 8. The reinforcing rib 8 can improve the structural strength of the first side plate 3 and the second side plate 4, improve the structural strength at the connection position of the first side plate 3 and the second side plate 4 with the first end plate 5 and the second end plate 6, and further improve the overall rigidity of the frame 2 and the protection effect on the battery cell 1, so that the battery cell 1 is fixed firmly and the service life of the battery cell 1 is prolonged.

[0032] Preferably, the reinforcing rib 8 has a first plug 81 and a second plug 82 which protrude from the plate body 7, the first plug 81 and the second plug 82 are respectively located at two ends of the reinforcing rib 8 along the second direction Y, and the first end plate 5 and the second end plate 6 are respectively provided with a plug slot 9 close to the plate surface of the plate body 7, and the first plug 81 and the second plug 82 are respectively plug-fitted with the plug slot 9.

[0033] The reinforcing rib 8 is plug-fitted with the plug slot 9 on the first end plate 5 and the second end plate 6 through the first plug 81 and the second plug 82, and the first plug 81 and the second plug 82 have a limiting action with the plug slot 9, which simplifies the assembly mode between the reinforcing rib 8 and the first end plate 5 and the second end plate 6, and also facilitates disassembly of the frame 2 when needed.

[0034] Preferably, the reinforcing rib 8 has a first plug 81 and a second plug 82 which protrude from the plate body 7, the first plug 81 and the second plug 82 are respectively located at two ends of the reinforcing rib 8 along the second direction Y, and the first plug 81 and the second plug 82 are respectively tightly assembled with the first end plate 5 and the second end plate 6.

[0035] The first plug 81 and the second plug 82 are respectively tightly assembled with the first end plate 5 and the second end plate 6, and the tight assembly can increase the structural strength of the connection position and increase the rigidity of the frame 2 and the battery module. In the embodiment, the first plug 81 and the second plug 82 are tightly connected with the first end plate 5 and the second end plate 6 through the bolts 14.

[0036] Preferably, the plate body 7 is an injection molded part, the reinforcing rib 8 is a steel plate part, and the plate body 7 and the reinforcing rib 8 are integrally injection molded.

[0037] The injection-molded parts are made of insulating material, giving the plate 7 insulating properties and increasing the insulation safety between the individual battery cells 1; in addition, injection molding is a low-cost manufacturing method. In this embodiment, the plate 7 can be made of materials such as plastic, and the reinforcing ribs 8 are made of steel strips.

[0038] Preferably, the frame 2 further includes a partition 10, which is connected to the plate 7. Multiple partitions 10 are spaced apart along the second direction Y, and a groove 11 for embedding the power supply core 1 is formed between two adjacent partitions 10 or between the partition 10 and the end plate.

[0039] Multiple partitions 10 are fixedly connected to the plate 7. Grooves 11 are formed between the partitions 10 and between the partitions 10 and the first end plate 5 or the second end plate 6. Each battery cell 1 can be embedded in a separate groove 11 to fix each battery cell 1. At the same time, the partitions 10 can increase the distance between the battery cells 1 to ensure the expansion gap and service life of the battery cells 1.

[0040] Preferably, along the first direction X, the size of the partition 10 is smaller than the size of the end plate.

[0041] The partition 10 fixedly connected to the plate 7 of the first side plate 3 and the partition 10 fixedly connected to the plate 7 of the second side plate 4 are arranged opposite to each other along the first direction X. Since the size of the partition 10 is smaller than the size of the end plate, there is a gap between the opposite partitions 10 on the first side plate 3 and the second side plate 4. This gap allows the adjacent cells 1 to expand, ensuring the expansion gap of the battery.

[0042] Preferably, both the first side plate 3 and the second side plate 4 include at least two reinforcing ribs 8, and each reinforcing rib 8 is distributed at intervals along the third direction Z.

[0043] At least two reinforcing ribs 8 are provided at intervals along the third direction Z on the plate 7 of the first side plate 3 and the second side plate 4, which can further improve the structural strength of the first side plate 3 and the second side plate 4 and the rigidity of the battery module.

[0044] Preferably, the battery module further includes cable ties 12, which are arranged in a closed structure around the first side plate 3, the first end plate 5, the second side plate 4, and the second end plate 6.

[0045] Cable ties 12 are arranged in a closed structure around the first side plate 3, the first end plate 5, the second side plate 4, and the second end plate 6, which can bind the first side plate 3, the first end plate 5, the second side plate 4, and the second end plate 6 into a whole, thus reinforcing the entire battery module. In this embodiment, the cable ties 12 can be made of materials such as nylon or steel, which can be determined according to the size and length of the battery module.

[0046] Preferably, the first side plate 3, the first end plate 5, the second side plate 4, and the second end plate 6 are all provided with an assembly groove 13 on the side opposite to the receiving cavity 15, and the cable tie 12 is embedded in the assembly groove 13.

[0047] Assembly slots 13 are provided on the side of the first side plate 3, the first end plate 5, the second side plate 4, and the second end plate 6 away from the receiving cavity 15. After the cable tie 12 is embedded in the assembly slot 13, the surface of the cable tie 12 is flush with the surface of the first side plate 3, the first end plate 5, the second side plate 4, and the second end plate 6, which can increase the battery density when multiple battery modules are arranged.

[0048] This utility model also provides a preferred embodiment of a battery pack, including a battery module. The specific structure of the battery module is the same as that of the battery module in any of the above embodiments, and will not be described again here.

[0049] In summary, this utility model embodiment provides a battery module and battery pack, wherein the first side plate and the second side plate of the frame are both formed by a plate and a reinforcing rib. The reinforcing rib is connected to the first end plate and the second end plate. The first side plate, the second side plate, the first end plate and the second end plate of the frame are connected by the reinforcing rib. The reinforcing rib can improve the structural strength of the first side plate and the second side plate, thereby improving the overall rigidity of the frame and the protection effect on the battery cell. The battery cell is firmly fixed and the service life of the battery cell is extended.

[0050] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery module, characterized in that, The battery module has a first direction (X), a second direction (Y), and a third direction (Z) that intersect each other in pairs, and the battery module includes: A battery cell (1), wherein there are multiple battery cells (1), and each battery cell (1) is arranged along the second direction (Y); The frame (2) includes a first side plate (3), a second side plate (4), a first end plate (5), and a second end plate (6). The first side plate (3) and the second side plate (4) are spaced apart along the first direction (X), and the first end plate (5) and the second end plate (6) are spaced apart along the second direction (Y). The first side plate (3), the second side plate (4), the first end plate (5), and the second end plate (6) form a receiving cavity (15), and the battery cell (1) is arranged in the receiving cavity (15). Both the first side plate (3) and the second side plate (4) include a plate body (7) and a reinforcing rib (8) fixedly assembled with the plate body (7). The reinforcing rib (8) extends along the second direction (Y), and the two ends of the reinforcing rib (8) are respectively connected to the first end plate (5) and the second end plate (6).

2. The battery module according to claim 1, characterized in that, The reinforcing rib (8) has a first plug (81) and a second plug (82) extending beyond the plate (7). The first plug (81) and the second plug (82) are located at both ends of the reinforcing rib (8) along the second direction (Y). The first end plate (5) and the second end plate (6) are respectively provided with slots (9) on the plate surface near the plate (7). The first plug (81) and the second plug (82) are respectively inserted into the slots (9).

3. The battery module according to claim 1, characterized in that, The reinforcing rib (8) has a first plug (81) and a second plug (82) extending beyond the plate (7). The first plug (81) and the second plug (82) are located at both ends of the reinforcing rib (8) along the second direction (Y). The first plug (81) is fastened to the first end plate (5) and the second plug (82) is fastened to the second end plate (6).

4. The battery module according to any one of claims 1-3, characterized in that, The plate (7) is an injection molded part, and the reinforcing rib (8) is a steel plate part. The plate (7) and the reinforcing rib (8) are integrally injection molded.

5. The battery module according to any one of claims 1-3, characterized in that, The frame (2) also includes a partition (10), which is connected to the plate (7). The partition (10) is provided with a plurality of partitions at intervals along the second direction (Y), and a slot (11) for embedding the battery cell (1) is formed between two adjacent partitions (10).

6. The battery module according to claim 5, characterized in that, Along the first direction (X), the size of the partition (10) is smaller than the size of the end plate.

7. The battery module according to any one of claims 1-3, characterized in that, Both the first side plate (3) and the second side plate (4) include at least two reinforcing ribs (8), and each reinforcing rib (8) is distributed at intervals along the third direction (Z).

8. The battery module according to any one of claims 1-3, characterized in that, The battery module also includes cable ties (12), which are arranged in a closed structure around the first side plate (3), the first end plate (5), the second side plate (4), and the second end plate (6).

9. The battery module according to claim 8, characterized in that, The first side plate (3), the first end plate (5), the second side plate (4), and the second end plate (6) are all provided with an assembly groove (13) on the side away from the receiving cavity (15), and the cable tie (12) is embedded in the assembly groove (13).

10. A battery pack, characterized in that, Includes the battery module as described in any one of claims 1-9.

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