Detachable battery cell module

Abstract

The utility model provides a detachable battery cell module, which belongs to the technical field of battery modules and comprises a battery cell, a base and a tab welding piece, the battery cell, the base and the tab welding piece form a single battery cell component, a battery cell module is formed by the single battery cell assembly, a connecting bar, an end plate, a steel belt, a harmonica-shaped plate, a heat-conducting silica gel pad and a U-shaped fixing plate, the battery cells and the base are connected into a whole through structural adhesive, a gluing layer is arranged on the upper portion of the base, a gluing table is arranged in the gluing layer and is of a double-ring structure, the inner ring and the outer ring of the double-ring structure have height difference, and the inner ring and the outer ring of the double-ring structure have height difference. The tab welding pieces are arranged at the tops of the battery cells, and the connecting row is used for connecting the adjacent battery cells by connecting the tab welding pieces; the embedded hexagon nuts are arranged on the two sides of the bottom of the base, through the design of the detachable module, maintenance and replacement are more convenient and faster, and the production and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery modules, and in particular relates to a detachable battery core module. Background Art

[0002] A cell is the most basic component of a battery, usually an electrochemical device encapsulated in a metal shell. It is a unit that stores and releases electrical energy, converting chemical energy into electrical energy through chemical reactions. A cell is usually composed of a positive electrode, a negative electrode, a separator, and an electrolyte. A battery module is a unit assembled from multiple cells to provide higher voltage and capacity. It is a component in a battery system, usually consisting of several cells, connectors, a battery management system (BMS for short), and a shell. The main function of a battery module is to connect multiple cells together to increase the voltage and energy storage capacity of the battery system. By connecting cells in parallel or in series, a battery module can meet the power requirements of different applications. Connecting cells in series can increase the total voltage, while connecting cells in parallel can increase the total capacity.

[0003] However, since square-shell batteries have no fixed points, they are often bonded to the base of the module box and PACK box using structural adhesive. After bonding, the batteries cannot be separated from the module box and PACK box, which causes great trouble for the subsequent maintenance of the batteries. At the same time, the positive and negative pole ears of general square-shell lithium batteries are mostly flat and cannot be threaded. When the batteries are connected in series or parallel, they are connected in the form of welded connecting pieces, which are not easy to disassemble and are prone to damage to the positive and negative pole ears of the batteries during disassembly. Utility Model Content

[0004] In view of this, the utility model provides a detachable battery cell module, which improves the utilization rate and maintainability of the battery cell by providing a detachable battery cell module structure and a threadedly connected pole ear structure.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a detachable battery module, comprising a battery, a base, and a tab welding sheet, wherein the battery, the base, and the tab welding sheet form a single battery assembly, wherein the single battery assembly and a connecting row, an end plate, a steel belt, a harmonica plate, a thermally conductive silicone pad, and a U-shaped fixing plate form a battery module, wherein the battery and the base are connected as one body by structural adhesive, a glue coating layer is provided on the upper part of the base, a glue coating platform is provided in the glue coating layer, the glue coating platform is a double-ring structure, and the inner and outer rings of the double-ring structure have a height difference, the tab welding sheet is provided on the top of the battery, and the connecting row is used to connect the adjacent battery cells by connecting the tab welding sheets;

[0007] Wherein, embedded hexagonal nuts are arranged on both sides of the bottom of the base.

[0008] The technical effects of a detachable battery cell module provided by the utility model are as follows: the overall structure constitutes a detachable module, so that the battery cell module and the box body can be easily installed and disassembled, which improves the convenience of repair and replacement and reduces production and maintenance costs; the battery cell and the base are bonded into an integrated structure with structural adhesive, so that the connection between the battery cell and the base is more firm and stable, and the quality and performance of the product are improved; the structural design of the base is reasonable, which can effectively support the battery cell and improve the stability and reliability of the entire module.

[0009] On the basis of the above technical solution, a detachable battery cell module of the utility model can also be improved as follows:

[0010] Wherein, the widths of two sides of the bottom of the base are smaller than the width of the base table top.

[0011] A glue coating table with height difference is provided in the glue coating layer, which can effectively control the uniformity of glue coating and prevent it from overflowing from the base. There are embedded hexagonal nuts on both sides of the base, and the width of both sides is smaller than the width of the base surface, which is convenient for installing U-shaped plates for fixing.

[0012] Furthermore, there are a plurality of hexagonal nuts, and the hexagonal nuts are used to fix the bottom surface of the single-cell assembly.

[0013] Furthermore, an M4 rivet screw is provided on the upper portion of the tab welding sheet, which is used to weld the tab welding sheet to the positive pole tab of the battery cell and the negative pole tab of the battery cell to form a threaded connection point.

[0014] Furthermore, there are multiple tab welding sheets.

[0015] Furthermore, the connecting row is connected to the tab welding sheet to realize serial and parallel threaded connection between the plurality of battery cells.

[0016] Furthermore, the U-shaped fixing plate connects the battery cell module and the module box body.

[0017] Furthermore, the hexagonal nut at the bottom of the base fixes the battery cell module and the module box body.

[0018] Furthermore, the tab welding sheet is an aluminum bar.

[0019] Furthermore, the base is a high-strength, flame-retardant plastic part that is resistant to high and low temperatures.

[0020] Compared with the prior art, the detachable battery module provided by the utility model has the following beneficial effects:

[0021] 1: The detachable design of the cell module and the box in the module box, PACK box and other structures is realized, so that the cell module can be easily installed and disassembled, which improves the convenience of maintenance and replacement and reduces the production and maintenance costs;

[0022] 2: Design a detachable structure for each battery cell so that the battery cells can be replaced individually, which improves the utilization and maintainability of the battery cells and reduces waste and costs;

[0023] 3: Ensure that the battery cell tabs will not be damaged during the disassembly process, thereby ensuring the safety and reliability of the battery cell and avoiding safety hazards caused by tab damage;

[0024] 4: It does not affect the installation of steel belts and end plates, making the entire structure more stable and reliable, and improving the quality and performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is an example diagram of a detachable battery cell module;

[0027] Figure 2 This is a disassembled diagram of a single cell component of Part A of a detachable cell module;

[0028] Figure 3 A top view of a detachable battery cell module;

[0029] Figure 4 It is a side view of a single cell assembly of a detachable cell module;

[0030] Figure 5 This is an example diagram of a detachable battery module base;

[0031] Figure 6 A bottom view of a detachable battery module base;

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1. Battery cell; 2. Base; 21. Glue coating layer; 22. Glue coating platform; 3. Tab welding sheet; 4. End plate; 5. Steel belt; 6. Harmonica board; 7. Thermal conductive silicone pad; 8. Connecting row; 9. U-shaped fixing plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the implementation mode of the present invention clearer, the technical solution in the implementation mode of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation mode of the present invention.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, it is a first embodiment of a detachable battery cell module provided by the utility model. In this embodiment, it includes a battery cell 1, a base 2, and a pole ear welding sheet 3. The battery cell 1, the base 2 and the pole ear welding sheet 3 constitute a single battery cell assembly, wherein the single battery cell assembly and the end plate 4, the steel belt 5, the harmonica plate 6, the thermal conductive silicone pad 7, the connecting row 8, and the U-shaped fixing plate 9 constitute a battery cell module, the battery cell 1 and the base 2 are connected as a whole by structural adhesive, a glue coating layer 21 is provided on the upper part of the base 2, a glue coating platform 22 is provided in the glue coating layer 21, the glue coating platform 22 is a double-ring structure, and the inner and outer rings of the double-ring structure have a height difference, the pole ear welding sheet 3 is arranged on the top of the battery cell 1, and the connecting row 8 is used to connect adjacent battery cells 1 by connecting the pole ear welding sheets 3;

[0036] Wherein, embedded hexagonal nuts are arranged on both sides of the bottom of the base 2.

[0037] It should be added that the hexagonal nut model - Grade C Type I hexagonal nut - Grade A and B hexagonal thin nut (GB / T41-2000) (GB / T6170-2000) (GB / T6172.1-2000); hexagonal nut with thread specification D = M12, performance level 5, no surface treatment, Grade C: nut GB / T41-2000M12; thread specification D = M12, performance level 8, no surface treatment, Grade A Type I hexagonal nut: nut GB / T6170-2000M12.

[0038] Among them, in the above technical solution, the width of both sides of the bottom of the base 2 is smaller than the width of the base table.

[0039] The bottom of the base is equipped with an embedded hexagonal nut to meet the needs of fixing the bottom surface of a single battery cell. After the base coating layer is filled with structural glue, the battery cell is placed on the base.

[0040] Furthermore, in the above technical solution, there are multiple hexagonal nuts, and the hexagonal nuts are used to fix the bottom surface of the single-cell assembly.

[0041] Furthermore, in the above technical solution, an M4 rivet screw is provided on the upper portion of the tab welding piece 3, which is used to weld the tab welding piece 3 to the positive and negative tabs of the battery cell 1 to form a threaded connection point.

[0042] Furthermore, in the above technical solution, there are multiple tab welding sheets 3.

[0043] Furthermore, in the above technical solution, the connection row 8 is connected to the tab welding sheet 3 to realize the threaded connection between the multiple battery cells 1 in series or in parallel.

[0044] Furthermore, in the above technical solution, the U-shaped fixing plate 9 connects the battery cell module and the module box body.

[0045] Furthermore, in the above technical solution, the tab welding sheet 3 is an aluminum bar.

[0046] Furthermore, in the above technical solution, the base 2 is a high-strength flame-retardant plastic part that is resistant to high and low temperatures.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, it is a second embodiment of a detachable battery cell module provided by the utility model. In this embodiment, it includes a battery cell 1, a base 2, and a pole ear welding sheet 3. The battery cell 1, the base 2 and the pole ear welding sheet 3 constitute a single battery cell assembly, wherein the single battery cell assembly and the end plate 4, the steel belt 5, the harmonica plate 6, the thermal conductive silicone pad 7, the connecting row 8, and the U-shaped fixing plate 9 constitute a battery cell module, the battery cell 1 and the base 2 are connected as a whole by structural adhesive, a glue coating layer 21 is provided on the upper part of the base 2, a glue coating platform 22 is provided in the glue coating layer 21, and the glue coating platform 22 is a double-ring structure, and the inner and outer rings of the double-ring structure have a height difference, the pole ear welding sheet 3 is arranged on the top of the battery cell 1, and the connecting row 8 is used to connect adjacent battery cells 1 by connecting the pole ear welding sheets 3;

[0048] Wherein, embedded hexagonal nuts are arranged on both sides of the bottom of the base 2.

[0049] Among them, in the above technical solution, the width of both sides of the bottom of the base 2 is smaller than the width of the base table.

[0050] The bottom of the base is equipped with an embedded hexagonal nut to meet the needs of fixing the bottom surface of a single battery cell. After the base coating layer is filled with structural glue, the battery cell is placed on the base.

[0051] Furthermore, in the above technical solution, there are multiple hexagonal nuts, and the hexagonal nuts are used to fix the bottom surface of the single-cell assembly.

[0052] Furthermore, in the above technical solution, an M4 rivet screw is provided on the upper portion of the tab welding piece 3, which is used to weld the tab welding piece 3 to the positive and negative tabs of the battery cell 1 to form a threaded connection point.

[0053] Furthermore, in the above technical solution, there are multiple tab welding sheets 3.

[0054] Furthermore, in the above technical solution, the connection row 8 is connected to the tab welding sheet 3 to realize the threaded connection between the multiple battery cells 1 in series or in parallel.

[0055] Furthermore, in the above technical solution, the hexagonal nut at the bottom of the base 2 fixes the battery cell module and the module box body.

[0056] Furthermore, in the above technical solution, the tab welding sheet 3 is an aluminum bar.

[0057] Furthermore, in the above technical solution, the base 2 is a high-strength flame-retardant plastic part that is resistant to high and low temperatures.

[0058] Specifically, the principle of the utility model is: the battery cell, the base and the tab connecting piece are used to form a structural form of the battery cell, so that the battery cell can be stably connected in the module, thereby improving the utilization rate and maintainability of the battery cell, reducing waste and cost, and the battery cell and the base are connected as one with structural adhesive, and the tab connecting piece is welded to the battery cell tab as one structure, so that the battery cell can be stably connected in the module, thereby improving the stability and reliability of the entire module. At the same time, the design of the detachable module makes maintenance and replacement more convenient and quick, and reduces production and maintenance costs.

Claims

1. A detachable battery cell module, comprising a battery cell (1), a base (2), and a tab welding sheet (3), wherein the battery cell (1), the base (2), and the tab welding sheet (3) constitute a single battery cell assembly, characterized in that: The single cell assembly, the end plate (4), the steel belt (5), the harmonica plate (6), the thermally conductive silicone pad (7), the connecting row (8), and the U-shaped fixing plate (9) form a cell module; the cell (1) and the base (2) are connected as one body by means of structural adhesive; a coating layer (21) is provided on the upper part of the base (2); a coating platform (22) is provided in the coating layer (21); the coating platform (22) is a double-ring structure; the inner and outer rings of the double-ring structure have a height difference; the tab welding sheet (3) is provided on the top of the cell (1); the connecting row (8) is used to connect adjacent cells (1) by connecting the tab welding sheet (3); Wherein, embedded hexagonal nuts are arranged on both sides of the bottom of the base (2).

2. A detachable battery module according to claim 1, characterized in that: The widths of two sides of the bottom of the base (2) are smaller than the width of the base surface.

3. A detachable battery module according to claim 2, characterized in that: There are multiple hexagonal nuts, and the hexagonal nuts are used to fix the bottom surface of the single-cell assembly.

4. A detachable battery cell module according to claim 3, characterized in that: An M4 pressure rivet screw is provided on the upper part of the tab welding sheet (3) for welding the tab welding sheet (3) to the positive pole tab of the battery cell (1) and the negative pole tab of the battery cell (1) to form a threaded connection point.

5. A detachable battery cell module according to claim 4, characterized in that: There are a plurality of tab welding sheets (3).

6. A detachable battery module according to claim 5, characterized in that: The connection row (8) is connected to the tab welding sheet (3) to realize serial and parallel threaded connection between the plurality of battery cells (1).

7. A detachable battery cell module according to claim 6, characterized in that: The U-shaped fixing plate (9) connects the battery core module and the module box body.

8. A detachable battery module according to claim 7, characterized in that: The hexagonal nut at the bottom of the base (2) fixes the battery cell module and the module box body.

9. A detachable battery cell module according to claim 8, characterized in that: The tab welding sheet (3) is an aluminum bar.

10. A detachable battery cell module according to claim 9, characterized in that: The base (2) is a high-strength, flame-retardant plastic part that is resistant to high and low temperatures.

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