A removable battery pack

Abstract

The utility model discloses a detachable battery pack, comprising a main body support, wherein the main body support is provided with a plurality of placement holes for placing battery cells, the battery cells are placed in the placement holes, bus bars are connected to both ends of the battery cells, a cover plate is provided on the outer side of the bus bar, through holes are correspondingly provided on the cover plate and the main body support, a long screw is installed in the through hole, an extension portion is provided on one side of the bus bar, the middle section of the extension portion is bent, the rear section of the extension portion is provided as a bending zone, the bending zone is provided with a mounting hole, the mounting hole in the bending zone is installed on a nut terminal through a conducting piece, the nut terminal is welded on a BMS board, the BMS board is located on one side of the main body support, the bus bar and the battery cell are detachable, so that the battery can be detached, replaced and reused.

Description

Technical Field

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

[0002] A battery pack is a high-voltage, large-capacity battery system formed by a precise combination of many individual battery cells. According to various application scenarios, the battery pack can be flexibly assembled with single cells of different numbers, chemical compositions and sizes. In conventional battery packs, the connection between the battery cell and the busbar is mainly achieved through resistance welding and laser welding. For example, patent CN214848944U discloses a busbar structure, a battery cell module and a battery pack. A specific busbar structure is used in the battery pack, which is conducive to improving the space utilization and wiring efficiency of the battery cell module. The positive pole of one battery cell and the negative pole of another battery cell are respectively welded to the corresponding output row welding part. However, after welding, the battery cell and the busbar are difficult to disassemble. If some of the battery cells have problems, it is difficult to replace a single battery cell. If the entire battery cell is scrapped, the scrapping cost is high and it is not conducive to environmental protection. In recent years, especially for overseas markets such as the European Union and the United Kingdom, out of the pursuit of environmental protection, it is necessary to realize the detachable, replaceable and reusable batteries in the future. Therefore, a detachable battery pack is required to meet market demand. Utility Model Content

[0003] The purpose of the present utility model is to overcome the above-mentioned defects or problems existing in the background technology and provide a detachable battery pack.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A detachable battery pack comprises a main frame, wherein the main frame is provided with a plurality of placement holes for placing battery cells, the battery cells are placed in the placement holes, bus bars are connected to both ends of the battery cells, a cover plate is provided on the outside of the bus bar, through holes are provided on the cover plate and the main frame correspondingly, a long screw is installed in the through hole, an extension portion is provided on one side of the bus bar, the middle section of the extension portion is bent, the rear section of the extension portion is provided as a bending zone, the bending zone is provided with a mounting hole, the mounting hole in the bending zone is installed on a nut terminal through a conductive piece, the nut terminal is welded on a BMS board, and the BMS board is located on one side of the main frame.

[0006] In some embodiments of the present invention, the main frame is provided with a placement groove corresponding to the extension portion.

[0007] In some embodiments of the present invention, a bent shock-absorbing portion is provided at the front section of the extension portion, and an arc-shaped bend is adopted in the middle section of the extension portion.

[0008] In certain embodiments of the utility model, the conducting member is configured as a conducting screw, and a locking nickel sheet for fixing the bending area is sleeved on the conducting screw.

[0009] In some embodiments of the present invention, positioning posts are provided at both ends of the main support, and the busbar is provided with positioning holes corresponding to the positioning posts.

[0010] In some embodiments of the present invention, the cover plate is provided with an elastic pad corresponding to the placement hole.

[0011] In certain embodiments of the utility model, a support grid is arranged inside the cover plate, a side of the cover plate facing the main support is arranged as a flat surface, and the elastic pad is fixed on the flat surface by secondary injection molding.

[0012] In certain embodiments of the present invention, the through holes are evenly distributed on the main support, the BMS board is located on the top side of the main support, and the two ends of the battery cell are connected to the busbar by pressing.

[0013] In certain embodiments of the utility model, the busbar includes a bus body, which is provided with a connecting portion corresponding to the placement hole, the connecting portion includes a pole connecting position, the pole connecting position is connected to the bus body through a plurality of thin bent cantilever beams, and the extension portion is arranged on one side of the bus body.

[0014] In some embodiments of the utility model, adhesive backing is provided on both sides of the converging body, and the adhesive backing on both sides is used to fix and bond the main body bracket and the cover plate respectively.

[0015] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The busbar and the battery cell are detachable, making the battery detachable, replaceable and reusable. The battery pack is convenient and safe during the disassembly and replacement process. At the same time, retired batteries can be reused. Retired batteries can be installed in the bracket body and used in home and industrial energy storage.

[0017] 2. The elastic pad is used to absorb the parts tolerance and assembly tolerance of the battery pack. The fine bent cantilever beam facilitates the deformation and pressing of the busbar during use. The elastic pad cooperates with the fine bent cantilever beam to ensure a tight pressing between the busbar and the battery cell.

[0018] 3. The long screws are evenly arranged in the main bracket. The long screws that penetrate the main bracket are used to enhance the structural strength of the main bracket. Support grids are set in the cover plates on both sides of the main bracket, so that the structural strength of the cover plates is better, which effectively protects the internal battery cells of the main bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 A schematic diagram of a cover plate of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the busbar of the utility model;

[0023] Figure 4 is a schematic diagram of an extension portion of the utility model;

[0024] Description of main reference numerals:

[0025] 1. Main bracket, 10. Placement hole, 11. Placement groove, 12. Positioning column, 2. Battery cell, 3. Bus, 30. Extension part, 31. Bending area, 32. Mounting hole, 33. Bending cushion part, 34. Positioning hole, 35. Bus body, 36. Pole connection position, 37. Thin bent cantilever beam, 4. Cover plate, 40. Through hole, 41. Elastic pad, 42. Support grid, 43. Flat surface, 5. Long screw, 6. BMS board, 60 nut terminal, 61. Conductor, 62. Locking nickel sheet. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. is to distinguish different objects rather than to describe a specific order.

[0028] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the invention.

[0029] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0030] In the claims, specification and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0031] For example, see Figure 1-4 .

[0032] A detachable battery pack includes a main frame 1, the main frame 1 is provided with a plurality of placement holes 10 for placing battery cells 2, the battery cells 2 are placed in the placement holes 10, bus bars 3 are connected to both ends of the battery cells 2, a cover plate 4 is provided on the outside of the bus bar 3, the cover plate 4 and the main frame 1 are correspondingly provided with through holes 40, the through holes 40 are installed with long screws 5, and the main frame 1 is connected and fixed to the cover plates 4 on both sides through the long screws 5.

[0033] An extension portion 30 is provided on one side of the busbar 3 , and the extension portion 30 is detachably mounted on a nut terminal 60 . The nut terminal 60 is welded on a BMS board 6 , and the BMS board 6 is located on one side of the main support 1 .

[0034] Specifically, the middle section of the extension 30 is bent, the front section of the extension 30 is connected to the bus 3, and the rear section of the extension 30 is set as a bending area 31. The bending area 31 is provided with a mounting hole 32. The mounting hole 32 of the bending area 31 is installed on the nut terminal 60 through the conductive member 61, so that the bus 3 is conductively connected to the BMS board 6. It can be understood that the extension 30 and the bus 3 are integrally formed. Preferably, the bending angle of the middle section of the extension 30 is set to 90°.

[0035] As an implementation manner, the conducting member 61 is configured as a conducting screw, and a locking nickel sheet 62 for fixing the bending area 31 is sleeved on the conducting screw.

[0036] As an implementation mode, a bending shock absorbing portion 33 is provided at the front section of the extension portion 30, and the middle section of the extension portion 30 is arc-shaped, and the center point of the arc is offset in a direction away from the extension portion 30, thereby playing a buffering and shock absorbing role.

[0037] As an implementation manner, the main frame 1 is provided with a placement groove 11 corresponding to the extension portion 30 , and the placement groove 11 facilitates the installation and placement of the extension portion 30 .

[0038] As an implementation manner, positioning posts 12 are provided at both ends of the main frame 1 , and positioning holes 34 are provided on the bus 3 corresponding to the positioning posts 12 , so as to facilitate the installation and positioning of the bus 3 .

[0039] As an implementation mode, the BMS board 6 is located on the top side of the main support 1. It can be understood that the BMS board 6 is provided with a plurality of plug-in connectors, and the plug-in connectors are convenient for wiring harness connection.

[0040] As an embodiment, the cover plate 4 is provided with an elastic pad 41 corresponding to the placement hole 10, the busbar 3 includes a busbar body 35, the busbar body 35 is provided with a connection portion corresponding to the placement hole 10, the connection portion includes a pole connection position 36, the pole connection position 36 is connected to the busbar body 35 through a plurality of thin bent suspension beams 37, and the extension portion 30 is provided on one side of the busbar body 35. The thin bent suspension beam 37 is curved in an arc shape, and the extension portion 30 is integrally formed with the busbar body 35.

[0041] As an implementation mode, the two ends of the battery cell 2 are connected to the pole connection position 36 of the busbar 3 by pressing, which is not easy to be separated due to shaking during use, thereby ensuring a good conduction effect.

[0042] As an implementation manner, the pole connection position 36 is provided with four thin bent suspension beams 37 , and the four thin bent suspension beams 37 are evenly distributed outside the pole connection position 36 .

[0043] The elastic pad 41 is used to absorb the component tolerance and assembly tolerance of the battery pack, and the thin bent suspension beam 37 facilitates the deformation and pressing of the busbar 3 during use to ensure the matching effect with the battery cell 2. The elastic pad 41 cooperates with the thin bent suspension beam 37 to ensure a tight pressing between the busbar 3 and the battery cell 2. Preferably, the compression amount of the elastic pad 41 is set to 25%.

[0044] It is understandable that the elastic pad 41 is a rubber pad or a silicone pad.

[0045] As an implementation mode, adhesive backing is provided on both sides of the bus body 35, and the adhesive backing on both sides is used to fix and bond the main body bracket 1 and the cover plate 4 respectively, so that the connection is more secure and avoids the failure of the bus 3 and the battery cell 2 to cooperate with each other due to the movement of the position between the battery cell 2 and the bus 3 during actual use of the battery pack product.

[0046] As an implementation mode, a support grid 42 is provided inside the cover plate 4, so that the structural strength of the cover plate 4 is better. The side of the cover plate 4 facing the main bracket 1 is set as a flat surface 43, and the elastic pad 41 is fixed on the flat surface 43 by secondary injection molding. The secondary injection molding method makes the installation of the elastic pad 41 more secure and effectively prevents the elastic pad 41 from falling off.

[0047] As an embodiment, the cover plate 4 includes an upper cover and a lower cover, and the upper cover and the lower cover are respectively located on both sides of the main support 1. The long screw 5 passes through the lower cover and the main support 1 in sequence and then connects to the upper cover. When disassembling, the upper cover is removed after the long screw 5 is rotated, and the bus 3 and the battery cell 2 to be replaced can be removed. Preferably, the front end of the long screw 5 is provided with a connecting thread, and the through hole 40 of the upper cover and the through hole 40 of the lower cover are respectively provided with threaded holes corresponding to the connecting thread, and the through hole 40 of the main support 1 is set as a through hole.

[0048] As an implementation manner, the through holes 40 are evenly distributed on the main frame 1 , so that the main frame 1 is subjected to uniform force, thereby effectively protecting the battery cells 2 .

[0049] The description of the above specification and embodiments is used to explain the protection scope of the utility model, but does not constitute a limitation on the protection scope of the utility model. Through the enlightenment of the utility model or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent replacements or other improvements to the embodiments of the utility model or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the utility model.

Claims

1. A detachable battery pack, characterized in that: It includes a main body bracket, which is provided with a plurality of placement holes, in which battery cells are placed, bus bars are connected at both ends of the battery cells, a cover plate is provided on the outside of the bus bar, through holes are provided on the cover plate and the main body bracket correspondingly, a long screw is installed in the through hole, an extension part is provided on one side of the bus bar, the middle section of the extension part is bent, the rear section of the extension part is provided as a bending zone, the bending zone is provided with a mounting hole, the mounting hole in the bending zone is detachably mounted on the nut terminal through a conductive piece, the nut terminal is welded on the BMS board, and the BMS board is located on one side of the main body bracket.

2. A detachable battery pack according to claim 1, characterized in that: The main frame is provided with a placement groove corresponding to the extension portion.

3. A detachable battery pack according to claim 1, characterized in that: The front section of the extension part is provided with a bending shock-absorbing part, and the middle section of the extension part is bent in an arc shape.

4. A detachable battery pack according to claim 1, characterized in that: The conducting member is configured as a conducting screw, and a locking nickel sheet for fixing the bending area is sleeved on the conducting screw.

5. A detachable battery pack according to claim 1, characterized in that: Positioning posts are arranged at both ends of the main frame, and positioning holes are arranged on the busbar corresponding to the positioning posts.

6. A detachable battery pack according to claim 1, characterized in that: The cover plate is provided with an elastic pad corresponding to the placement hole.

7. A detachable battery pack according to claim 6, characterized in that: A supporting grid is arranged inside the cover plate, and a side of the cover plate facing the main support is arranged as a flat surface, and the elastic pad is fixed on the flat surface by secondary injection molding.

8. The detachable battery pack according to claim 1, characterized in that: The through holes are evenly distributed on the main support, the BMS board is located on the top side of the main support, and the two ends of the battery cell are connected to the busbar by pressing.

9. A detachable battery pack according to any one of claims 1 to 8, characterized in that: The busbar comprises a busbar body, which is provided with a connection portion corresponding to the placement hole, and the connection portion comprises a pole connection position, which is connected to the busbar body through a plurality of thin bent cantilever beams, and the extension portion is arranged on one side of the busbar body.

10. A detachable battery pack according to claim 9, characterized in that: Adhesive backing is arranged on both sides of the confluence body.

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