Battery pack assembly

Abstract

The utility model is applicable to the technical field of surface cleaning equipment, and particularly relates to a battery pack assembly, which comprises a battery monomer, a first end cover, a second end cover, a first pole piece, a second pole piece and a circuit board, the first end cover is covered on the first end of the battery monomer, the second end cover is covered on the second end of the battery monomer, and the first pole piece and the second pole piece are arranged on the circuit board. The circuit board is arranged on one side of the single battery, a first notch, a second notch and a third notch are formed in the circuit board, the first pole piece is connected with the first end of the single battery and penetrates through the first notch, and the second pole piece is connected with the second end of the single battery and penetrates through the second notch or the third notch. The utility model aims to solve the technical problems that the universality of parts among the existing battery packs with different specifications is poor, and the manufacturing cost is not favorably reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a battery pack assembly. Background Art

[0002] With the increasing popularity of wireless appliances, the market demand for battery packs continues to rise. Common lithium-ion batteries on the market include 18650 and 21700. These different grades and specifications vary not only in capacity but also in size. Application manufacturers typically use these different grades and specifications to create battery pack components, and often require both grades and specifications. For example, within the same appliance, there may be high-end and standard configurations. For example, a high-end product might use a 21700 lithium-ion battery, while a standard product might use an 18650 lithium-ion battery.

[0003] A battery pack refers to a whole composed of multiple lithium battery cells connected in series and parallel. They are usually wrapped in a shell and then connected through a circuit board. The above-mentioned 18650 lithium battery and 21700 lithium battery refer to two specifications of lithium battery cells. In the prior art, when electrical appliance manufacturers design battery packs of different capacities, they often keep the number of battery cells unchanged and only change the brand specifications of the battery cells. For example, a battery pack composed of 6 cells, using 6 18650 lithium battery cells and 6 21700 lithium battery cells has a different total capacity. This design can ensure that the overall size of the battery pack is not much different, which is conducive to ensuring the consistency of the battery pack during installation. However, this design still cannot avoid the need to configure different shells and circuit boards when the battery pack is manufactured, resulting in poor versatility between battery pack parts, which is not conducive to reducing production costs. Utility Model Content

[0004] The purpose of the present utility model is to provide a battery pack assembly, aiming to solve the technical problem that the parts of existing battery packs of different specifications have poor commonality, which is not conducive to reducing production costs.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A battery pack assembly includes a battery cell, a first end cover, a second end cover, a first pole piece, a second pole piece and a circuit board, wherein the first end cover is provided on the first end of the battery cell, the second end cover is provided on the second end of the battery cell, the circuit board is provided on one side of the battery cell, and a first notch, a second notch and a third notch are provided on the circuit board, the first pole piece is connected to the first end of the battery cell and is provided through the first notch, and the second pole piece is connected to the second end of the battery cell and is provided through the second notch or the third notch.

[0007] Optionally, it includes a battery cell, a first end cover, a second end cover, a first pole piece, a second pole piece and a circuit board, wherein the first end cover is provided on the first end of the battery cell, the second end cover is provided on the second end of the battery cell, the circuit board is provided on one side of the battery cell, and a first notch, a second notch and a third notch are provided on the circuit board, the first pole piece is connected to the first end of the battery cell and is passed through the first notch, and the second pole piece is connected to the second end of the battery cell and is passed through the second notch or the third notch.

[0008] Optionally, the first end cover is provided with a first notch at a position corresponding to the first pole piece, and the outer side of the first pole piece is exposed from the first notch; the second end cover is provided with a second notch at a position corresponding to the second pole piece, and the outer side of the second pole piece is exposed from the second notch.

[0009] Optionally, the first pole piece is configured as a flat metal sheet, and the second pole piece is configured as a flat metal sheet.

[0010] Optionally, a first groove is provided on the inner side of the first end cover, and a second groove is provided on the inner side of the second end cover. The first end of the battery cell is adaptively embedded in the first groove, and the second end of the battery cell is adaptively embedded in the second groove.

[0011] Optionally, a connecting seat is provided on the side of the first end cover, and a connecting column is provided on the side of the second end cover corresponding to the connecting seat, and the connecting column is connected to the connecting seat by screws.

[0012] Optionally, there are multiple first slots, and the multiple first slots are arranged in a row at intervals; there are multiple second slots, and the multiple second slots are arranged in a row at intervals; there are multiple third slots, and the multiple third slots are arranged in a row at intervals.

[0013] Optionally, the first notch and the third notch are arranged at the edge of the circuit board, and the first notch and the third notch are set to be open on one side facing the edge; the second notch is located between the first notch and the third notch, and the second notch is closer to the third notch.

[0014] Optionally, a positioning post is provided on the side of the first end cover and the second end cover facing the circuit board, and a positioning hole is provided on the circuit board at a position corresponding to the positioning post, and the positioning post is embedded in the positioning hole.

[0015] Optionally, the outer ends of the first end cover and the second end cover are both provided with fixing seats.

[0016] The battery pack assembly of the present invention is provided with a first notch, a second notch and a third notch on the circuit board, so that the second pole piece can be selectively inserted into the second notch or the third notch, so that the circuit board can be suitable for battery cells of two specifications, solving the technical problem that the circuit boards of existing battery packs of different specifications cannot be used interchangeably, which is not conducive to reducing production costs.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of a battery pack assembly provided by an embodiment of the present utility model;

[0019] Figure 2 A perspective view of a battery pack assembly provided by an embodiment of the present invention using an 18650 lithium battery cell;

[0020] Figure 3 A cross-sectional view of a battery pack assembly provided by an embodiment of the present invention using an 18650 lithium battery cell;

[0021] Figure 4 A perspective view of a battery pack assembly provided by an embodiment of the present invention using an 18650 lithium battery cell;

[0022] Figure 5 This is a cross-sectional view of a battery pack assembly provided in an embodiment of the present invention using a 21700 lithium battery cell.

[0023] The names and numbers of the components in the figure are:

[0024] 1. Battery cell; 2. First end cap; 3. Second end cap; 4. First pole piece; 5. Second pole piece; 6. Circuit board; 7. First notch; 8. Second notch; 9. Third notch; 10. First groove; 11. Second groove; 12. Connecting post; 13. Connecting base; 14. Positioning post; 15. Positioning hole; 16. Fixing base; 17. First gap; 18. Second gap. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] Please refer to the attached Figure 1-5As shown, an embodiment of the present invention provides a battery pack assembly, including a battery cell 1, a first end cover 2, a second end cover 3, a first pole piece 4, a second pole piece 5 and a circuit board 6, wherein the first end cover 2 is provided on the first end of the battery cell 1, the second end cover 3 is provided on the second end of the battery cell 1, the circuit board 6 is provided on one side of the battery cell 1, and a first notch 7, a second notch 8 and a third notch 9 are provided on the circuit board 6, the first pole piece 4 is connected to the first end of the battery cell 1 and is passed through the first notch 7, the second pole piece 5 is connected to the second end of the battery cell 1 and is passed through the second notch 8 or the third notch 9.

[0027] Optionally, it includes a battery cell 1, a first end cover 2, a second end cover 3, a first pole piece 4, a second pole piece 5 and a circuit board 6, wherein the first end cover 2 is covered on the first end of the battery cell 1, the second end cover 3 is covered on the second end of the battery cell 1, the circuit board 6 is arranged on one side of the battery cell 1, and a first notch 7, a second notch 8 and a third notch 9 are provided on the circuit board 6, the first pole piece 4 is connected to the first end of the battery cell 1 and is passed through the first notch 7, and the second pole piece 5 is connected to the second end of the battery cell 1 and is passed through the second notch 8 or the third notch 9.

[0028] Optionally, the first end cover 2 is provided with a first notch 17 at a position corresponding to the first pole piece 4, and the outer side of the first pole piece 4 is exposed from the first notch 17; the second end cover 3 is provided with a second notch 18 at a position corresponding to the second pole piece 5, and the outer side of the second pole piece 5 is exposed from the second notch 18.

[0029] Optionally, the first pole piece 4 is configured as a flat metal sheet, and the second pole piece 5 is configured as a flat metal sheet.

[0030] Optionally, a first groove 10 is provided on the inner side of the first end cover 2, and a second groove 11 is provided on the inner side of the second end cover 3. The first end of the battery cell 1 is adaptively embedded in the first groove 10, and the second end of the battery cell 1 is adaptively embedded in the second groove 11.

[0031] Optionally, a connecting seat 13 is provided on the side of the first end cover 2, and a connecting column 12 is provided on the side of the second end cover 3 corresponding to the connecting seat 13, and the connecting column 12 is connected to the connecting seat 13 by screws.

[0032] Optionally, there are multiple first slots 7, which are arranged in a row at intervals; there are multiple second slots 8, which are arranged in a row at intervals; there are multiple third slots 9, which are arranged in a row at intervals.

[0033] Optionally, the first notch 7 and the third notch 9 are provided at the edge of the circuit board 6, with the first notch 7 and the third notch 9 being open on the side facing the edge; the second notch 8 is located between the first notch 7 and the third notch 9, with the second notch 8 being closer to the third notch 9. Opening the first notch 7 and the third notch 9 on the side facing the edge increases the tolerance during design and manufacturing, making dimensional deviation less likely to occur during installation.

[0034] Optionally, a positioning post 14 is provided on the first end cover 2 and the second end cover 3 on the side facing the circuit board 6 , and a positioning hole 15 is provided on the circuit board 6 at a position corresponding to the positioning post 14 , and the positioning post 14 is embedded in the positioning hole 15 .

[0035] Optionally, the outer ends of the first end cover 2 and the second end cover 3 are both provided with a fixing seat 16. The fixing seat 16 is used to fix the battery pack during installation.

[0036] In specific applications, if the battery cell 1 uses an 18650 lithium battery cell, the first end cap 2 and the second end cap 3 should be compatible with the battery cell, but the circuit board 6 should be a universal circuit board 6. Since the 18650 lithium battery cell is shorter than the 21700 lithium battery cell, the first pole piece 4 at the first end of the 18650 lithium battery cell is inserted into the first notch 7, and the second pole piece 5 at the second end of the 18650 lithium battery cell is inserted into the second notch 8. If the battery cell 1 uses a 21700 lithium battery cell, since the 21700 lithium battery cell is longer than the 18650 lithium battery cell, the first pole piece 4 at the first end is still inserted into the first notch 7, but the second pole piece 5 at the second end is inserted into the third notch 9. Thus, the circuit board 6 is applicable to both 18650 and 21700 lithium battery cells.

[0037] To sum up, the battery pack assembly of the present invention is provided with a first notch 7, a second notch 8 and a third notch 9 on the circuit board 6, so that the second pole piece 5 can be selectively inserted into the second notch 8 or the third notch 9, so that the circuit board 6 can be suitable for two specifications of battery cells 1, solving the technical problem that the circuit boards 6 of existing battery packs of different specifications cannot be used interchangeably, which is not conducive to reducing production costs.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery pack assembly, characterized in that: It includes a battery cell, a first end cover, a second end cover, a first pole piece, a second pole piece and a circuit board, the first end cover is provided on the first end of the battery cell, the second end cover is provided on the second end of the battery cell, the circuit board is provided on one side of the battery cell, and a first notch, a second notch and a third notch are provided on the circuit board, the first pole piece is connected to the first end of the battery cell and is provided through the first notch, and the second pole piece is connected to the second end of the battery cell and is provided through the second notch or the third notch.

2. The battery pack assembly according to claim 1, characterized in that: The circuit board extends at least to the outside of the first end cover on one side of the first end of the battery cell, and extends at least to the outside of the second end cover on one side of the second end of the battery cell. The first notch is arranged flush with the first end of the battery cell, and the second notch or the third notch is arranged flush with the second end of the battery cell.

3. The battery pack assembly according to claim 2, characterized in that: The first end cover is provided with a first notch at a position corresponding to the first pole piece, and the outer side of the first pole piece is exposed from the first notch; the second end cover is provided with a second notch at a position corresponding to the second pole piece, and the outer side of the second pole piece is exposed from the second notch.

4. The battery pack assembly according to claim 3, characterized in that: The first pole piece is configured as a flat metal sheet, and the second pole piece is configured as a flat metal sheet.

5. The battery pack assembly according to claim 1, characterized in that: A first groove is provided on the inner side of the first end cover, a second groove is provided on the inner side of the second end cover, the first end of the battery cell is adaptively embedded in the first groove, and the second end of the battery cell is adaptively embedded in the second groove.

6. The battery pack assembly according to claim 5, characterized in that: A connecting seat is provided on the side of the first end cover, and a connecting column is provided on the side of the second end cover corresponding to the connecting seat. The connecting column and the connecting seat are connected by screws.

7. The battery pack assembly according to claim 1, characterized in that: There are multiple first notches, which are arranged in a row at intervals; there are multiple second notches, which are arranged in a row at intervals; there are multiple third notches, which are arranged in a row at intervals.

8. The battery pack assembly according to claim 7, characterized in that: The first notch and the third notch are arranged at the edge of the circuit board, and the first notch and the third notch are set to be open on one side of the edge; the second notch is located between the first notch and the third notch, and the second notch is closer to the third notch.

9. The battery pack assembly according to claim 1, characterized in that: Positioning posts are provided on the first end cover and the second end cover on one side facing the circuit board. Positioning holes are provided on the circuit board at positions corresponding to the positioning posts, and the positioning posts are embedded in the positioning holes.

10. The battery pack assembly according to claim 1, characterized in that: The outer ends of the first end cover and the second end cover are both provided with fixing seats.

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