Ultrathin blade module structure

Abstract

The utility model discloses an ultrathin blade module structure which comprises a plurality of battery pack module units capable of being freely combined. Wherein each battery pack module unit is composed of a bottom pressing plate, a side profile, a middle profile, a battery cell, a series busbar I, a series busbar II, a series busbar III, a total positive aluminum bar, a total negative aluminum bar, an adapter bracket, an insulating protective cover PC sheet, aerogel, a plastic uptake bracket and an insulating sheet PC from top to bottom; according to the novel ultrathin blade battery module, the internal resistance generated in the connecting process is extremely small, and each string of voltage difference meets the actual requirement. Meanwhile, more combination schemes are provided on the aspect of module combination results, and corresponding adjustment can be made according to different working conditions. According to the ultrathin blade module structure disclosed by the utility model, the most important characteristic of the module is that the module is relatively thin, and the heat of the battery cell is dissipated through the internal air channel of the profile, so that the normal work and the timely service life of a battery pack are ensured.

Description

Technical Field

[0001] The utility model relates to the field of battery modules, in particular to an ultra-thin blade module structure. Background Art

[0002] In a battery PACK, the modules are connected by wire harnesses or aluminum bar structural parts and locked with screw fasteners to apply torque. Currently, the module structures designed for blade batteries usually stack several battery cells together, and the structural fixings are assembled and fixed with nylon straps, steel straps, sheet metal parts or die-cast end plates. The connection impedance of screw connections is much greater than that of laser welding. There are many main influencing factors for the large connection impedance formed by screw connections. For example, the surface of the cell pole connection surface is uneven, resulting in poor contact between the cell pole surfaces; the screw tightening force is insufficient, and the tightening torque of each screw is inconsistent; external factors interfere with the loosening of the screws, including the loosening of the screws caused by vibration during transportation and handling; the efficiency of a single module group is low, the universality is not high, and there are problems such as high processing and manufacturing costs and low efficiency; the overall length of a single module is relatively long, increasing the difficulty of manufacturing plastic molds, with expensive processing fees and long processing cycles, which cannot meet the requirements of rapid assembly in production and affect the product reliability. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an ultra-thin blade module structure to solve the above technical problems.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An ultra-thin blade module structure includes multiple battery pack module units that can be freely combined. Each battery pack module unit includes, from top to bottom, a bottom pressing plate, a side profile, a middle profile, a battery cell, a first series busbar, a second series busbar, a third series busbar, a total positive aluminum bar, a total negative aluminum bar, a transfer bracket, an insulating protective cover PC sheet, aerogel, a plastic suction bracket, and an insulating sheet PC. The bottom pressing plate is locked with the side profile and the middle profile by fasteners. The tooth pieces of the side profile and the middle profile are attached to the insulating sheet PC. The battery cell is inserted into the side profile and the middle profile. An aerogel is attached to the battery cell. The plastic suction bracket is stuck on the battery cell. The first series busbar, the second series busbar, and the third series busbar are sequentially stuck on the plastic suction bracket. The first series busbar, the second series busbar, and the third series busbar are laser welded to the battery cell poles in sequence. The insulating sheet PC is attached to the plastic suction bracket, and then an insulating protective cover is attached. The total positive aluminum bar and the total negative aluminum bar are locked with the transfer bracket by screws, and the transfer bracket is fixed to the side profile to form a complete battery module.

[0006] Preferably, the bottom pressing plate, the side profile, and the middle profile are made of aluminum.

[0007] Preferably, the materials of the first series busbar, the second series busbar, the third series busbar, the positive main aluminum bar, and the negative main aluminum bar are all aluminum alloy.

[0008] Preferably, the plastic suction bracket is a plastic suction part.

[0009] Preferably, in the structure of the ultra-thin blade battery module, the plastic suction bracket can be replaced by a plastic bracket.

[0010] Preferably, the first series busbar, the second series busbar, the third series busbar, the positive main aluminum bar, and the negative main aluminum bar can be replaced by other conductive metal materials, including pure nickel and pure copper.

[0011] Preferably, the aerogel can be replaced by a high-temperature resistant foam.

[0012] Compared with the prior art, the present utility model has the following advantages: In the connection process of the novel ultra-thin blade battery module, the internal resistance generated is extremely small, and the voltage difference of each string meets the actual requirements. At the same time, more combination schemes are provided in the module combination result, and corresponding adjustments can be made for different working conditions. In the structure of the ultra-thin blade module of the present utility model, the most important feature of the module is that it is relatively thin, and the heat dissipation of the battery cells is dissipated through the internal air duct of the profile to ensure the normal operation and service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an assembly schematic diagram of a single battery pack module unit of the present utility model;

[0014] Figure 2 It is a side view structure schematic diagram of a single battery pack module unit of the present utility model;

[0015] Figure 3 It is an overall schematic diagram of a single battery pack module unit of the present utility model;

[0016] In the figure: bottom pressing plate 1, side profile 2, middle profile 3, battery cell 4, first series busbar 5, second series busbar 6, third series busbar 7, positive main aluminum bar 8, negative main aluminum bar 9, adapter bracket 10, insulating protective cover PC sheet 11, aerogel 12, plastic suction bracket 13, insulating sheet PC14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0018] As Figures 1-3As shown in the figure, a structure of an ultra-thin blade module includes a plurality of battery pack module units that can be freely combined. It is characterized in that each battery pack module unit consists of a bottom pressing plate 1, a side profile 2, a middle profile 3, a battery cell 4, a series busbar 1 5, a series busbar 2 6, a series busbar 3 7, a total positive aluminum bar 8, a total negative aluminum bar 9, a transfer bracket 10, an insulating protective cover PC sheet 11, an aerogel 12, a blister bracket 13, and an insulating sheet PC 14 from top to bottom; the bottom pressing plate 1 is locked with the side profile 2 and the middle profile 3 by fasteners, the tooth pieces of the side profile 2 and the middle profile 3 are attached to the insulating sheet PC 14, the battery cell 4 is inserted into the side profile 2 and the middle profile 3, an aerogel 12 is attached to the battery cell 4, the blister bracket 13 is stuck on the battery cell 6, the series busbar 1 5, the series busbar 2 6, and the series busbar 3 7 are sequentially stuck on the blister bracket 13, and the series busbar 1 5, the series busbar 2 6, and the series busbar 3 7 are laser welded to the pole columns of the battery cell 4 in sequence. The insulating sheet PC 14 is attached to the blister bracket 13, and then an insulating protective cover 11 is attached. The total positive aluminum bar 8 and the total negative aluminum bar 9 are locked with the transfer bracket 10 by screws, and the transfer bracket 10 is fixed to the side profile 2 to form a complete battery module.

[0019] The aerogel 12 acts between battery cells. Its purpose is to play a buffering and heat insulation role when the battery cells expand and contract thermally. When a thermal runaway occurs in the battery cells, the aerogel can prevent the transfer of heat and has high-temperature resistance. The bottom pressing plate 1, the side profile 2, and the middle profile 3 are made of aluminum. The purpose is to fix the battery cells and the profiles together to form a battery pack and transfer the internal temperature of the battery pack to the outside through the heat dissipation channels inside the profiles; the series busbar 1 5, the series busbar 2 6, the series busbar 3 7, the total positive aluminum bar 8, and the total negative aluminum bar 9 are all made of aluminum alloy. Laser welding technology is used to connect with the positive and negative electrodes of the battery cells. Because of its fast cooling speed, it obtains a fine weld microstructure and good joint performance. Laser welding does not require electrodes, reducing man-hours and costs.

[0020] The blister bracket is a blister part; the blister part plays an insulating and protective role when welding the aluminum bars; the insulating sheet PC has high mechanical properties and dielectric properties, good heat resistance and moisture resistance, and good mechanical processability, and is suitable for use as an insulating and protective part in the battery pack.

[0021] In the ultra-thin blade battery module structure, the blister bracket can be replaced with a plastic bracket. The series busbar 1 5, the series busbar 2 6, the series busbar 3 7, the total positive aluminum bar 8, and the total negative aluminum bar 9 can be replaced with other conductive metal materials, including pure nickel and pure copper. The aerogel 12 can be replaced with high-temperature resistant foam.

[0022] Assembly process of the present utility model: First, lock the bottom pressing plate 1, side profiles 2, and middle profiles 3 with fasteners. The tooth pieces of the profiles are attached to the insulating sheet PC. Then, insert the battery cells 4 into the side profiles 2 and middle profiles 3 in sequence. Then, attach an aerogel 12 to the battery cells 4, and insert the battery cells 4 into the side profiles 2 and middle profiles 3 again. By analogy, insert the 16th battery cell into the side profiles 2 and middle profiles 3, then attach the aerogel 12, and lock the bottom pressing plate 1 with the side profiles 2 and the middle profiles 3 to complete the fixed assembly of the battery cells. Then, clip the plastic suction bracket 13 onto the battery cells 6, and clip the busbars onto the plastic suction bracket 13 in sequence. Laser weld the busbars to the pole columns of the battery cells 4 in sequence. The laser welding technology can minimize the internal resistance between the two modules. After welding, attach the insulating sheet PC14 to the plastic suction bracket 13, and then attach an insulating protective cover 11. Finally, lock the positive main aluminum bar 8 and the negative main aluminum bar 9 to the adapter bracket 10 with screws. The adapter bracket 10 is fixed to the side profile 2 to form a complete battery module.

[0023] The above is a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the teachings of the present utility model, without departing from the principle and spirit of the present utility model, the changes, modifications, substitutions, and variations made to the implementation manners still fall within the protection scope of the present utility model.

Claims

1. An ultra-thin blade module structure, comprising a plurality of freely combinable battery pack module units, characterized in that: Each battery pack module unit is composed of a bottom pressing plate, a side profile, a middle profile, a battery cell, a series bus bar 1, a series bus bar 2, a series bus bar 3, a total positive aluminum bar, a total negative aluminum bar, a switching bracket, an insulating protective cover PC sheet, an aerogel, a blister bracket, and an insulating sheet PC from top to bottom; the bottom pressing plate is locked with the side profile and the middle profile by fasteners, the teeth of the side profile and the middle profile are attached to the insulating sheet PC, and the battery cell is inserted into the side profile and the middle profile. An aerogel is attached to the battery cell, the blister bracket is clamped on the battery cell, the series bus bar 1, the series bus bar 2, and the series bus bar 3 are clamped on the blister bracket in sequence, and the series bus bar 1, the series bus bar 2, and the series bus bar 3 are laser welded to the battery cell pole in sequence, the blister bracket is attached with an insulating sheet PC, and then an insulating protective cover is attached, the total positive aluminum bar and the total negative aluminum bar are locked with the adapter bracket by screws, and the adapter bracket is fixed together with the side profile to form a complete battery module.

2. An ultra-thin blade module structure as claimed in claim 1, characterized in that: The bottom pressing plate, side profiles and middle profiles are made of aluminum.

3. The ultra-thin blade module structure according to claim 1, characterized in that: The series busbar 1, series busbar 2, series busbar 3, total positive aluminum bar and total negative aluminum bar are all made of aluminum alloy.

4. The ultra-thin blade module structure according to claim 1, characterized in that: The blister support is a blister piece.

5. The ultra-thin blade module structure according to claim 4, characterized in that: The blister bracket in the ultra-thin blade battery module structure can be replaced by a plastic bracket.

6. The ultra-thin blade module structure according to claim 3, characterized in that: Series bus bar 1, series bus bar 2, series bus bar 3, total positive aluminum bar and total negative aluminum bar can be replaced with conductive metal materials.

7. The ultra-thin blade module structure according to claim 1, characterized in that: Aerogel can be replaced with high temperature resistant foam.

Images