Cylindrical lithium battery pack convenient to assemble

Abstract

The utility model relates to a cylindrical lithium battery pack convenient to assemble, which comprises a battery cell support, first cylindrical battery cells and second cylindrical battery cells, a plurality of first cylindrical battery cells are arranged at the upper part in the battery cell support, and a plurality of second cylindrical battery cells are arranged at the lower part in the battery cell support; positive and negative electrodes of the second cylindrical battery cells and the first cylindrical battery cells are oppositely arranged, a fixed bracket is mounted at the top of the battery cell bracket, a BMS is mounted on the fixed bracket, one end of each first cylindrical battery cell is connected with a first nickel strap, and one end of each second cylindrical battery cell is connected with a second nickel strap; the other ends of the first cylindrical battery cell and the second cylindrical battery cell are connected with the third nickel strap; the internal structure of the battery pack adopts a copper-nickel composite metal copper bar for current collector confluence, one end is spot-welded on a plurality of battery cells, and the other end is locked on a BMS acquisition point by adopting a thread structure, so that the consistency of the product structure can be ensured, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field especially relates to a cylindrical lithium battery group convenient to assemble. BACKGROUND

[0002] With the rise of new energy lithium battery and the improvement of life requirement, lithium battery gradually replaces lead-acid battery due to the advantages of large energy density, small environmental pollution and intelligent management control of equipment information interaction, but the battery group is generally composed of multiple cylindrical cells, generally connected by wire soldering, the structure is complex and is not conducive to standardized production, which greatly reduces the production efficiency. UTILITY MODEL CONTENT

[0003] The utility model solves the technical problem that the battery group is generally composed of multiple cylindrical cells, generally connected by wire soldering, the structure is complex and is not conducive to standardized production, which greatly reduces the production efficiency.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A cylindrical lithium battery group convenient to assemble, including cell support, first cylindrical cell and second cylindrical cell, the cell support inside upper portion is installed with a plurality of first cylindrical cells, the cell support inside lower portion is installed with a plurality of second cylindrical cells, and the positive and negative poles of the second cylindrical cell and the first cylindrical cell are placed reversely, the cell support top is installed with fixed support, the fixed support is installed with BMS, the first cylindrical cell one end is connected with first nickel strip, the second cylindrical cell one end is connected with second nickel strip, the first cylindrical cell and second cylindrical cell other end are connected with third nickel strip.

[0006] Preferably, the BMS is installed with positive electrode current collector and negative electrode current collector, and the positive electrode current collector is connected with the first nickel strip, and the negative electrode current collector is connected with the second nickel strip.

[0007] Preferably, the positive electrode current collector includes first red copper sheet connected with the BMS and first nickel sheet connected with the first nickel strip.

[0008] Preferably, the negative electrode current collector includes second red copper sheet connected with the BMS and second nickel sheet connected with the second nickel strip.

[0009] Preferably, the fixed support and BMS are fixed by screw connection, and the positive electrode current collector and negative electrode current collector are fixed by screw connection with the BMS.

[0010] The utility model discloses a beneficial effect is: to the battery pack internal structure adopts copper nickel composite metal copper row to carry the current collector convergence, and one end point is welded in the screw structure lock in BMS collection point on the one end of many electric core, can guarantee the consistency of product structure, improve production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is whole structure schematic diagram of the utility model.

[0012] LEGEND:

[0013] 1, electric core support 2, first cylindrical electric core 3, second cylindrical electric core 4, fixed support 5, BMS 6, first nickel strip 7, second nickel strip 8, third nickel strip 9, positive electrode current collector 10, negative electrode current collector. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiments of the utility model will be apparently and completely described below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of protection of the utility model.

[0015] The specific embodiments are given below.

[0016] Referring to Figure 1 A cylindrical lithium battery pack convenient to assemble, including electric core support 1, first cylindrical electric core 2 and second cylindrical electric core 3, the top inside of electric core support 1 is installed with a plurality of first cylindrical electric core 2, the bottom inside of electric core support 1 is installed with a plurality of second cylindrical electric core 3, and the positive and negative poles of second cylindrical electric core 3 and first cylindrical electric core 2 are placed reversely, the top of electric core support 1 is installed with fixed support 4, and BMS 5 is installed on fixed support 4, one end of first cylindrical electric core 2 is connected with first nickel strip 6, one end of second cylindrical electric core 3 is connected with second nickel strip 7, and the other end of first cylindrical electric core 2 and second cylindrical electric core 3 is connected with third nickel strip 8.

[0017] BMS 5 is installed with positive electrode current collector 9 and negative electrode current collector 10, and the positive electrode current collector 9 is connected with first nickel strip 6, and the negative electrode current collector 10 is connected with second nickel strip 7, the positive electrode current collector 9 includes the first red copper sheet connected with BMS 5 and the first nickel sheet connected with first nickel strip 6, and the negative electrode current collector 10 includes the second red copper sheet connected with BMS 5 and the second nickel sheet connected with second nickel strip 7, first nickel strip 6 and second nickel strip 7 are welded and connected with positive electrode current collector 9 and negative electrode current collector 10 respectively, realizing that the positive and negative poles of first cylindrical electric core 2 and second cylindrical electric core 3 are connected with positive electrode current collector 9 and negative electrode current collector 10.

[0018] The fixed support 4 and the BMS 5 are fixed by screw connection, the positive electrode current collector 9 and the negative electrode current collector 10 are both fixed by screw connection with the BMS 5, and installation and connection among the BMS 5, the positive electrode current collector 9 and the negative electrode current collector 10 are facilitated.

[0019] The first cylindrical battery cell 2 and the second cylindrical battery cell 3 are units of the battery pack, are assembled with the battery cell support 1 to form a battery pack module, the battery cell support 1 is of plastic material, the circular ring structure can fix the positive and negative poles of the cylindrical battery cell, the first nickel belt 6, the second nickel belt 7 and the third nickel belt 8 are welded at two ends of the first cylindrical battery cell 2 and the second cylindrical battery cell 3 by a cylindrical battery cell resistance welding machine, the positive electrode current collector 9 and the negative electrode current collector 10 are current collectors that are composed of a copper sheet and a nickel sheet by laser welding, and the nickel sheet is welded outside the first nickel belt 6 and the second nickel belt 7 by the cylindrical battery cell resistance welding machine.

[0020] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A cylindrical lithium battery pack which is easy to assemble, characterized in that, The application relates to a battery pack, which comprises a battery cell support (1), a first cylindrical battery cell (2) and a second cylindrical battery cell (3), the battery cell support (1) is internally provided with a plurality of first cylindrical battery cells (2) arranged on the top, the battery cell support (1) is internally provided with a plurality of second cylindrical battery cells (3) arranged on the bottom, the second cylindrical battery cell (3) is arranged reversely to the positive and negative poles of the first cylindrical battery cell (2), a fixing support (4) is arranged on the top of the battery cell support (1), a BMS (5) is arranged on the fixing support (4), one end of each of the first cylindrical battery cells (2) is connected with a first nickel belt (6), one end of each of the second cylindrical battery cells (3) is connected with a second nickel belt (7), and the other end of each of the first cylindrical battery cells (2) and the second cylindrical battery cells (3) is connected with a third nickel belt (8).

2. A cylindrical lithium battery pack for easy assembly according to claim 1, wherein The BMS (5) is internally provided with a positive electrode current collector (9) and a negative electrode current collector (10), the positive electrode current collector (9) is connected with the first nickel belt (6), and the negative electrode current collector (10) is connected with the second nickel belt (7).

3. A cylindrical lithium battery pack for easy assembly according to claim 2, wherein The positive electrode current collector (9) comprises a first red copper sheet connected with the BMS (5) and a first nickel sheet connected with the first nickel belt (6).

4. A cylindrical lithium battery pack for easy assembly according to claim 3, wherein The negative electrode current collector (10) comprises a second red copper sheet connected with the BMS (5) and a second nickel sheet connected with the second nickel belt (7).

5. A cylindrical lithium battery pack for easy assembly according to claim 4, wherein The fixing support (4) and the BMS (5) are fixedly connected through screws, and the positive electrode current collector (9) and the negative electrode current collector (10) are fixedly connected with the BMS (5) through screws.

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