Small battery pack with protective case

Abstract

The present invention discloses a small battery pack with a protective box, which solves the problems of the prior art such as single battery style, flammability and explosion, and is characterized in that: the box body (1) is a rectangular straight-cylinder structure, the four sides are arc-shaped edges (4), and a round hole (5) is arranged at the edge of the top opening; the box cover (2) is a concave square structure, two threading holes (9) for leading out the positive and negative bus of the battery module are arranged on the bottom plate of the cover, threaded holes (7) are arranged at the round holes (5) arranged at the edge of the top opening of the box body (1) on the surrounding side walls, and an embedded fixed edge (8) is arranged at the outer edge of the top; the battery module (3) is assembled by a high-capacity battery core (10), a single-sided nickel sheet (11) and a double-sided nickel sheet (12) according to the PCAK procedure. It has the advantages of compact structure, simple production, safe use, adjustable size, various styles, beautiful appearance, etc., and can be widely used in various types of electric vehicles.

Description

Technical field:

[0001] The invention belongs to the field of new energy battery accessories, and in particular relates to a small battery pack with a protection box. Background technology:

[0002] The 21st century is an era with new energy as its theme, and new energy power batteries also show their unstoppable development momentum in response to the needs of the times. At present, the battery packs in the new energy market are of the same style and size, and cannot be changed in production. They cannot adapt well to the market's upgrades. The single style cannot meet the needs of the market and customers. In the process of battery production and use, there are problems such as fire and explosion. Electric vehicle batteries are only wrapped with PVC plastic parts in production and use, and the outer layer is unprotected. When the battery is impacted by fire and explosion, it cannot effectively protect the safety of the vehicle and the user. At the same time, the battery module cannot be isolated from the outside world in a vacuum, and cannot effectively prevent water ingress, water leakage and other adverse phenomena on rainy days, reducing the battery life. Summary of the invention:

[0003] The object of the present invention is to provide a small battery pack with a protective box which has a compact structure, is simple to manufacture, is safe to use, has adjustable size, has various styles, and has a beautiful appearance.

[0004] The technical solution adopted by the present invention is as follows: it comprises a box body, a box cover and a battery module arranged in the box body, the box body is a rectangular straight-cylindrical structure, the four sides of the box body are arc-shaped edges, and a circular hole is arranged at the edge of the open end of the box body. The box cover is a concave square structure, two threading holes for leading out the positive and negative buses of the battery module are arranged on the top plate of the box cover, threaded holes are arranged on the side wall of the box cover corresponding to the circular holes, and an embedded fixed edge is arranged at the open end of the box cover. The battery module is assembled from battery cells and nickel sheets according to the combined packaging process of the battery pack, and the electrodes of several battery cells are arranged in the same direction and in parallel as a group, and the positive and negative electrodes of the two connected groups of battery cells are connected by nickel sheets, and the positive and negative buses are led out from the positive and negative electrodes of the battery cells at the end of the battery module; the space between the battery module and the box body is filled with flame-retardant colloid.

[0005] Furthermore, the circular hole is a sinking hole on the outer wall, and a flange is provided on the inner wall of the threaded hole.

[0006] Furthermore, the battery module is composed of a plurality of battery cells as a group, and the positive and negative poles of two adjacent groups of battery cells are arranged closely and inverted, the positive and negative poles of the two adjacent groups of battery cells in the middle are connected by double-sided nickel sheets, and the positive and negative poles of the battery cells at both ends of the battery module are connected by single-sided nickel sheets to lead out positive and negative buses, and the battery pack is assembled according to the combined packaging process to form a silverfish-shaped structure.

[0007] Furthermore, the battery module can also be composed of several cells as a group, and the positive and negative electrodes of several groups of cells are connected in series up and down into a row through a single-sided nickel sheet, and the positive and negative electrodes of multiple columns of cells are mutually inverted and overlapped into a whole. The positive and negative electrodes of two adjacent overlapping columns of cell groups at the ends of the battery module are connected through a double-sided nickel sheet, and the negative electrode of the first group of cells in the first column and the positive electrode of the last group of cells in the last column are led out to the positive and negative bus through a single-sided nickel sheet, and then assembled into a series-parallel folding structure according to the combined packaging process of the battery pack.

[0008] The beneficial effects of the present invention are: high-capacity small-size batteries, with the production process, the same model can produce battery packs of different sizes according to different needs, can quickly respond to the update of battery size in the market, and each model has a variety of styles (such as silverfish style, folding style, long strip style), which is more in line with the needs of the market and customers. The steel structure is firm, which can prevent the impact caused by battery fire and explosion, and ensure the personal safety of users; the full glue process is used inside to isolate the battery module from the outside vacuum, effectively preventing the occurrence of adverse phenomena such as water ingress and leakage, and extending the service life of the battery. It has the advantages of compact structure, simple production, safe use, adjustable size, diverse styles, beautiful appearance, etc., and can be widely used in various types of electric vehicles.

[0009] The present invention will be further described below in conjunction with the accompanying drawings. Description of the drawings:

[0010] Figure 1 This is a three-dimensional assembly exploded view of the present invention;

[0011] Figure 2 It is a schematic diagram of the three-dimensional structure of the box cover of the present invention;

[0012] Figure 3 This is a schematic diagram of the assembly structure of the whitebait-type battery module of the present invention;

[0013] Figure 4 This is a schematic diagram of the assembly structure of the foldable battery module of the present invention;

[0014] Figure 5 It is a schematic diagram of the assembly structure of the long-bar battery module of the present invention.

[0015] In the figure: 1 is a box body, 2 is a box cover, 3 is a battery module, 4 is an arc-shaped edge, 5 is a round hole, 6 is a positive and negative bus, 7 is a threaded hole, 8 is an embedded fixed edge, 9 is a threading hole, 10 is a high-capacity battery cell, 11 is a single-sided nickel sheet, and 12 is a double-sided nickel sheet. Specific implementation method:

[0016] The small battery pack with a protective box is composed of a box body 1, a box cover 2 and a battery module 3 arranged in the box body 1. Figure 1As shown, the box body 1 is a rectangular straight-cylindrical structure, the four sides of the box body 1 are arc-shaped edges 4, and a circular hole 5 is provided at the edge of the opening end of the box body 1, and the circular hole 5 is a sinking hole in the outer wall. Figure 2 As shown, the box cover 2 is a concave square structure, and two threading holes 9 for leading out the positive and negative bus of the battery module are arranged on the top plate of the box cover 2. The side wall of the box cover 2 is provided with a threaded hole 7 corresponding to the circular hole 5, and the inner wall of the threaded hole 7 is provided with a flange. The open end of the box cover 2 is provided with an embedded fixed edge 8. The battery module 3 is assembled by a battery cell 10, a single-sided nickel sheet 11 or a double-sided nickel sheet 12 according to the combined packaging process of the battery pack. The electrodes of several battery cells 10 are arranged in the same direction and are grouped together. The positive and negative electrodes of the two connected groups of battery cells are connected by a single-sided nickel sheet 11 or a double-sided nickel sheet 12, and the positive and negative buses 6 are led out at the ends of the battery module 3 through the single-sided nickel sheet 11; the battery module 3 and the box body are bonded and connected with flame retardant glue.

[0017] like Figure 3 As shown, the battery module 3 is composed of a plurality of battery cells 10 as a group, and the positive and negative electrodes of two adjacent groups of battery cells 10 are arranged closely and inverted, and the positive and negative electrodes of the two adjacent groups of battery cells 10 in the middle are connected by double-sided nickel sheets 12, and the positive and negative electrodes of the battery cells 10 at both ends of the battery module 3 are connected by single-sided nickel sheets 11 to lead out the positive and negative buses 6, and are assembled into a silverfish-shaped structure according to the combined packaging process of the battery pack.

[0018] like Figure 4 , Figure 5 As shown, the battery module 3 may also be composed of a plurality of battery cells 10 as a group, the positive and negative electrodes of the plurality of battery cell groups are connected in series up and down into a column through a single-sided nickel sheet 11, the positive and negative electrodes of the plurality of battery cell columns are mutually inverted and overlapped into a whole, the positive and negative electrodes of the two adjacent overlapping battery cell groups at the ends of the battery module 3 are connected through a double-sided nickel sheet 12, and the negative electrode of the first group of battery cells in the first column and the positive electrode of the last group of battery cells in the last column are led out to the positive and negative bus 6 through a single-sided nickel sheet 11, and then assembled into a series-parallel folding structure according to the combined packaging process of the battery pack.

[0019] Embodiment 1:

[0020] like Figure 3As shown, 52 high-capacity batteries 10 are taken, 4 batteries per group, and two adjacent groups are arranged upside down and closely to form a battery module 3. The positive and negative electrodes of the battery groups at both ends of the battery module 3 are connected by spot welding through a single-sided nickel sheet 11, and the positive and negative buses 6 are led out. The positive and negative electrodes of the two adjacent battery groups in the middle are connected by a double-sided nickel sheet 12. The size of the silverfish-style small battery module 3 assembled according to PCAK is 74mm×66mm×250mm. A rectangular straight-cylinder box body 1 with an overall size of 78mm×70mm×260mm and a concave square box cover 2 with a size of 75mm×67mm×10mm are made of metal materials. First, the small battery module 3 assembled by PCAK is placed in the box body 1 of a rectangular straight-cylinder structure, and the positive and negative buses 6 are led out through the positive and negative bus threading holes 9 on the top plate of the box cover 2, and then the box cover 2 is embedded in the box body 1. At this time, the embedded fixed edge 8 is stuck on the opening edge of the rectangular straight-cylinder box body 1. Then, a vacuum glue pouring process is used around the small battery module 3 to fill the space between the battery module 3 and the box body 1 with flame retardant colloid, so that the battery module 3 is in a vacuum state, and finally the box body 1, the box cover 2 and the small battery module 3 are fixed together with bolts through the sunken circular hole 5 set at the edge of the opening of the box body 1 and the corresponding inward flange threaded hole 7 of the box cover 2. It has the advantages of compact structure, simple production, safe use, beautiful appearance, etc., and can be widely used in various types of electric vehicles.

[0021] Embodiment 2:

[0022] like Figure 4As shown, 52 high-capacity battery cells 10 are taken, and each group of 4 is divided into 13 groups, and each group of 5 is connected in series through a single-sided nickel sheet 11 to form a full column, and the other 3 groups are connected in series to form a half column, and the electrodes of the battery cells of the two full columns are reversed and overlapped, and then the electrodes of the half column and the overlapped battery cells are reversed and overlapped, and the positive and negative electrodes of the two adjacent groups of battery cells at the ends are connected through the double-sided nickel sheet 12, and at the end of the battery module 3, the negative electrode of the first battery cell group and the positive electrode of the last battery cell group are led out to the positive and negative bus 6 through the single-sided nickel sheet 11; taking the series-parallel foldable small battery module 3 with an overall size of 74mm×55mm×325mm assembled by PCAK as an example, a rectangular straight cylindrical box body 1 with an overall size of 78mm×60mm×335mm and an inwardly concave square box cover 2 with a size of 75mm×57mm×10mm are made of metal material. First, put the small battery module 3 assembled by PCAK into the rectangular straight-cylinder box body 1, lead the positive and negative bus 6 through the positive and negative bus threading holes 9 on the bottom plate of the box cover 2, and then embed the box cover 2 into the box body 1. At this time, the embedded fixed edge 8 is stuck on the opening edge of the rectangular straight-cylinder box body 1. Then, a vacuum glue pouring process is used around the small battery module 3 to make it in a vacuum state. Finally, the box body 1, the box cover 2 and the small battery module 3 are fixed together with bolts through the sunken circular hole 5 set on the opening edge of the box body 1 and the corresponding inward flange threaded hole 7 of the box cover 2. It has the advantages of compact structure, simple production, safe use, beautiful appearance, etc., and can be widely used in various types of electric vehicles.

[0023] Embodiment three:

[0024] like Figure 5As shown, 52 high-capacity battery cells 10 are taken, and each group of 4 is divided into 13 groups, and they are connected in series into 7 groups in one column and 6 groups in one column through a single-sided nickel sheet 11. Then, the electrodes of the two columns of battery cell groups are reversed and overlapped, and the positive and negative electrodes of the two adjacent battery cell groups at the ends are connected through a double-sided nickel sheet 12, and the negative electrode of the first group of battery cells in the first column and the positive electrode of the last group of battery cells in the last column are led out to the positive and negative bus 6 through the single-sided nickel sheet (11). Taking the series-parallel foldable small battery module 3 with an overall size of 74mm×37mm×455mm assembled by PCAK as an example, a rectangular straight-cylinder box body 1 with an overall size of 78mm×40mm×465mm and an inward-recessed square box cover 2 with a size of 75mm×38mm×10mm are made of metal materials. First, put the small battery module 3 assembled by PCAK into the rectangular straight-cylinder box body 1, lead the positive and negative bus 6 through the positive and negative bus threading holes 9 on the bottom plate of the box cover 2, and then embed the box cover 2 into the box body 1. At this time, the embedded fixed edge 8 is stuck on the opening edge of the rectangular straight-cylinder box body 1. Then, a vacuum glue pouring process is used around the small battery module 3 to make it in a vacuum state. Finally, the box body 1, the box cover 2 and the small battery module 3 are fixed together with bolts through the sunken circular hole 5 set on the opening edge of the box body 1 and the corresponding inward flange threaded hole 7 of the box cover 2. It has the advantages of compact structure, simple production, safe use, beautiful appearance, etc., and can be widely used in various types of electric vehicles.

Claims

1. A small battery pack with a protective box, comprising a box body (1), a box cover (2) and a battery module (3) arranged in the box body (1), characterized in that: The box body (1) is a rectangular straight-cylindrical structure, the four sides of the box body (1) are arc-shaped edges (4), and a circular hole (5) is provided at the edge of the open end of the box body (1); the box cover (2) is a concave square structure, two threading holes (9) for leading out the positive and negative buses of the battery module are provided on the top plate of the box cover (2), threaded holes (7) are provided on the side wall of the box cover (2) corresponding to the circular holes (5), and an embedded fixing edge (8) is provided at the open end of the box cover (2); the battery module (3) is assembled from battery cells (10) and nickel sheets according to the combined packaging process of the battery pack, and the electrodes of a plurality of battery cells (10) are arranged in the same direction as a group, and the positive and negative electrodes of the two groups of battery cells are connected by nickel. The battery module (3) is connected to the box body (1), and the positive and negative electrodes of the battery cells at the end of the battery module (3) are connected to the positive and negative buses (6); the battery module (3) and the box body (1) are filled with flame retardant colloid; the circular hole (5) is a sink hole on the outer wall, and the inner wall of the threaded hole (7) is provided with a flange; the battery module (3) is composed of a plurality of battery cells (10) as a group, and the positive and negative electrodes of two adjacent groups of battery cells (10) are arranged in reverse and closely, and the positive and negative electrodes of the two adjacent groups of battery cells (10) in the middle are connected by a double-sided nickel sheet (12), and the positive and negative electrodes of the battery cells (10) at the two ends of the battery module (3) are connected by a single-sided nickel sheet (11) to lead out the positive and negative buses (6), and the battery pack is assembled according to the combined packaging process to form a silverfish-shaped structure; Take 52 battery cells (10), with 4 cells in each group, and arrange two adjacent groups upside down and closely to form a battery module (3). The positive and negative electrodes of the battery cell groups at both ends of the battery module (3) are respectively connected by spot welding through a single-sided nickel sheet (11), and the positive and negative electrodes of the two adjacent battery cell groups in the middle are connected through a double-sided nickel sheet (12). According to the size of the silverfish-shaped small battery module (3) assembled by PCAK, the size of 74mm×66mm×250mm is 74mm×66mm×250mm. A rectangular straight-tube box body (1) with an overall size of 78mm×70mm×260mm and an inwardly concave square box cover (2) with a size of 75mm×67mm×10mm are made of metal materials. First, the small battery module (3) assembled by PCAK is placed in the rectangular straight-tube structure The positive and negative buses (6) are inserted into the box body (1), the positive and negative buses are led out through the positive and negative bus threading holes (9) on the top plate of the box cover (2), and the box cover (2) is then embedded into the box body (1). At this time, the embedded fixing edge (8) is stuck on the opening edge of the rectangular straight-cylinder box body (1), and then a vacuum glue pouring process is used around the small battery module (3) to fill the space between the battery module (3) and the box body (1) with flame-retardant glue, so that the battery module (3) is in a vacuum state. Finally, the box body (1), the box cover (2) and the small battery module (3) are fixed together by bolts through the sunken circular holes (5) provided on the opening edge of the box body (1) and the corresponding inward flange threaded holes (7) of the box cover (2). The invention has the advantages of compact structure, simple manufacture, safe use and beautiful appearance, and is widely used in various types of electric vehicles.

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