Balanced heating battery module structure

Abstract

The utility model discloses a battery module structure which is reasonable in design, good in stability and balanced in heating. The battery pack comprises a plurality of battery cells stacked side by side and aluminum sheet connecting pieces, the plurality of battery cells are connected through the aluminum sheet connecting pieces to form a battery cell module, end plates are arranged at the two ends of the battery cell module, side plates are symmetrically arranged between the two sides of the lower portions of the two end plates, and the aluminum sheet connecting pieces are arranged at the two ends of the battery cell module. Limiting plates are symmetrically arranged between the two sides of the upper portions of the two end plates, heating pieces are symmetrically arranged between the two sides of the middles of the two end plates, the heating pieces are attached to the side walls of the middles of the battery cell modules, the two end plates are used for limiting left-right movement of the battery cell modules, and the two side plates are used for limiting front-back movement of the battery cell modules. And a module cover plate is mounted between the two limiting plates. The battery module is applied to the technical field of battery modules.

Description

Technical Field

[0001] The utility model relates to a battery module structure, in particular to a battery module structure with balanced heating. Background Art

[0002] In the northern winter environment, at 0℃, in a low temperature environment, the electrolyte conductivity of the lithium battery decreases, resulting in a decrease in lithium ion transmission activity, an increase in the internal resistance of the battery, and affecting the discharge performance. In addition, the transmission rate of lithium ions inside the positive and negative electrodes will also decrease, and the discharge chemical reaction rate will slow down, causing the battery to easily reach the discharge cut-off potential, thereby reducing the battery's available capacity. If the temperature is too low, the machine cannot be started and cannot work normally. In order to ensure normal operation at a lower temperature, the battery needs to be heated in advance, so there is a need to add a heating plate to the battery to heat the lithium battery to a temperature that the battery can be used to maintain outdoor use.

[0003] In the existing technology, when the battery module is heated, the battery module has uneven heating areas and uneven power, which will cause the disadvantage of uneven heating of multiple battery cells, affecting the life and stability of the battery. If a battery module with balanced heating can be developed, the life and stability of the battery can be greatly improved. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a battery module structure with reasonable design, good stability and balanced heating.

[0005] The technical solution adopted by the utility model is: the utility model includes a plurality of battery cells and aluminum sheet connectors stacked side by side, and the plurality of battery cells are connected to form a battery cell module through the aluminum sheet connector, and end plates are arranged at both ends of the battery cell module, side plates are symmetrically arranged between the lower sides of the two end plates, limiting plates are symmetrically arranged between the upper sides of the two end plates, heating plates are symmetrically arranged between the middle sides of the two end plates, and the heating plates are attached to the middle side walls of the battery cell module, the two end plates are used to limit the left and right movement of the battery cell module, the two side plates are used to limit the front and back movement of the battery cell module, and a module cover is installed between the two limiting plates.

[0006] Furthermore, Mylar sheets are arranged between adjacent battery cells, and epoxy boards are attached to the four sides of the battery cell module.

[0007] Furthermore, the end plate includes a panel, a connecting frame plate is arranged around the rear end of the panel, a plurality of first threaded holes are arranged on both sides of the connecting frame plate, and a plurality of second threaded holes are arranged at the lower end of the connecting frame plate; the side plate includes a bottom support plate and a side support plate vertically connected to one side of the bottom support plate, both ends of the bottom support plate are provided with second connecting holes adapted to the second threaded holes, the limiting plate includes an upper limiting support plate and a side panel, the side panel is perpendicular to the upper end of the upper limiting support plate, both ends of the upper limiting support plate and both ends of the heating plate and both ends of the side panel are provided with first connecting holes adapted to the first threaded holes, and the module cover plate is locked between the two side panels by bolts.

[0008] Furthermore, a mounting groove is provided on one side of the upper end of the connecting frame plate, and a connecting terminal is installed in the mounting groove; the aluminum sheet connector is used to connect to the positive and negative electrodes of the battery cell, and the outer end of the aluminum sheet connector is provided with a waist-shaped hole fixed to the connecting terminal.

[0009] Furthermore, the four epoxy plates around the battery cell module are respectively located between the side support plate and the battery cell module and between the upper limit support plate and the battery cell module.

[0010] Furthermore, a third threaded hole is provided in the middle of the upper end of the connecting frame plate, an expansion bracket is provided between the middle of the upper ends of the two connecting frame plates, and third connecting holes compatible with the third threaded hole are provided at both ends of the expansion bracket, and the expansion bracket is located between the electrical module and the module cover plate.

[0011] Furthermore, EVA foam is arranged between the end plate and the battery core module.

[0012] Furthermore, the epoxy board and the heating plate are both made of composite materials; the Mylar sheet and the module cover are both made of polyester film.

[0013] The beneficial effects of the utility model are: 1. The two sides of the battery cell module can be easily assembled, the heating can be evenly distributed, and the size of the heating plate can be adjusted according to the actual working conditions by adjusting the size of the side plate and the limit plate, and it is extremely flexible and versatile; 2. The heating plate is arranged in the middle of the two sides of the battery cell module, so that the battery cell is heated from the middle of the two sides, which solves the problem of uneven heating of multiple battery cells in the battery cell module, thereby improving the service life and overall stability of the overall battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is an explosion schematic diagram of the utility model;

[0016] Figure 3 It is a structural diagram of the end plate. DETAILED DESCRIPTION

[0017] like Figures 1 to 3 As shown, in this embodiment, the utility model includes a plurality of battery cells 1 and aluminum sheet connectors 2 stacked side by side, and the plurality of battery cells 1 are connected by the aluminum sheet connectors 2 to form a battery cell module, and end plates 3 are arranged at both ends of the battery cell module, and side plates 4 are symmetrically arranged between the lower sides of the two end plates 3, and limiting plates 5 are symmetrically arranged between the upper sides of the two end plates 3, and heating plates 6 are symmetrically arranged between the middle sides of the two end plates 3, and the heating plates 6 are attached to the middle side walls of the battery cell module, the two end plates 3 are used to limit the left and right movement of the battery cell module, and the two side plates 4 are used to limit the forward and backward movement of the battery cell module, and a module cover plate 7 is installed between the two limiting plates 5, and the end plates, the side plates and the limiting plates are all made of cold-rolled plates, which are easy to process, and the purpose is to fix the stacked battery cells 1 together.

[0018] In this embodiment, a Mylar sheet 8 is arranged between adjacent battery cells 1. The Mylar sheet 8 acts between the battery cells 1 and serves to provide heat insulation and buffering when the battery cells 1 expand. The Mylar sheet 8 and the module cover 7 are both made of polyester film, which has high transparency, heat resistance, mechanical strength, high insulation, and good processability.

[0019] The battery module is surrounded by epoxy plates 9. The epoxy plates 9 and the heating plate 6 are made of composite materials and have high mechanical properties in a medium temperature environment and stable electrical properties in a high temperature environment. In addition, the epoxy plates 9 also have good moisture resistance and heat resistance.

[0020] In this embodiment, the end plate 3 includes a panel 31, and a connecting frame plate 32 is arranged around the rear end of the panel 31. Three first threaded holes 33 are arranged on both sides of the connecting frame plate 32, and a plurality of second threaded holes 34 are arranged at the lower end of the connecting frame plate 32; the side plate 4 includes a bottom support plate and a side support plate vertically connected to one side of the bottom support plate, and both ends of the bottom support plate are provided with second connecting holes adapted to the second threaded holes 34; the limiting plate 5 includes an upper limit support plate and a side panel, and the side panel is perpendicular to the The upper end of the upper limit support plate, both ends of the upper limit support plate, both ends of the heating plate 6 and both ends of the side support plate are provided with a first connecting hole compatible with the first threaded hole 33, and the module cover plate 7 is bolted between the two side panels. This design is easy to disassemble and assemble as a whole, and the heating plate 6 can be bolted between the middle parts of the two end plates 3. It is easy to process and the area of ​​the heating plate 6 can be increased or decreased by adjusting the size of the side plate 4 and the limit plate 5. Battery cells 1 of different specifications can be heated, and it is highly versatile.

[0021] In this embodiment, a mounting groove 35 is provided on one side of the upper end of the connecting frame plate 32, and a connecting terminal 36 is installed in the mounting groove 35; the aluminum sheet connector 2 is used to connect with the positive and negative electrodes of the battery cell 1, and the outer end of the aluminum sheet connector 2 is provided with a waist-shaped hole fixed to the connecting terminal 36, and the aluminum sheet connector 2 includes a series aluminum sheet 21 and a total positive and negative aluminum sheet 22. The series aluminum sheet 21 and the total positive and negative aluminum sheet 22 are made of AL1060O soft aluminum, and are connected to the positive and negative electrodes of the battery cell 1 using laser welding technology. AL1060o soft aluminum has good electrical conductivity and excellent thermal conductivity, which reduces the problem of different heights of the battery cell 1 ears due to welding, and reduces working hours and costs.

[0022] In this embodiment, the four epoxy plates 9 around the battery cell module are respectively located between the side support plate and the battery cell module and between the upper limit support plate and the battery cell module.

[0023] In this embodiment, a third threaded hole 37 is provided in the middle of the upper end of the connecting frame plate 32, and an expansion bracket 10 is provided between the middle of the upper ends of the two connecting frame plates 32. Third connecting holes matching the third threaded hole 37 are provided at both ends of the expansion bracket 10. The expansion bracket 10 is located between the battery cell module and the module cover plate 7. The expansion bracket 10 is also made of cold-rolled plate, and electrical components can be installed at the upper end of the expansion bracket 10.

[0024] In this embodiment, an EVA foam 11 is provided between the end plate 3 and the battery core module to prevent vibration.

[0025] The utility model is applied to the technical field of battery modules.

[0026] Although the embodiments of the present invention are described with practical solutions, they do not constitute limitations on the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A battery module structure with heating balance, characterized in that: It comprises a plurality of battery cells (1) and aluminum sheet connectors (2) stacked side by side. The plurality of battery cells (1) are connected by the aluminum sheet connectors (2) to form a battery cell module. End plates (3) are arranged at both ends of the battery cell module. Side plates (4) are symmetrically arranged between the lower sides of the two end plates (3). Limiting plates (5) are symmetrically arranged between the upper sides of the two end plates (3). Heating plates (6) are symmetrically arranged between the middle sides of the two end plates (3). The heating plates (6) are attached to the middle side walls of the battery cell module. The two end plates (3) are used to limit the left and right movement of the battery cell module. The two side plates (4) are used to limit the front and rear movement of the battery cell module. A module cover plate (7) is installed between the two limiting plates (5).

2. A heating and balancing battery module structure according to claim 1, characterized in that: Mylar sheets (8) are arranged between adjacent battery cells (1), and epoxy boards (9) are attached to the four sides of the battery cell module.

3. A heating and balancing battery module structure according to claim 2, characterized in that: The end plate (3) comprises a panel (31), a connecting frame plate (32) is arranged around the rear end of the panel (31), a plurality of first threaded holes (33) are arranged on both sides of the connecting frame plate (32), and a plurality of second threaded holes (34) are arranged at the lower end of the connecting frame plate (32); the side plate (4) comprises a bottom support plate and a side support plate vertically connected to one side of the bottom support plate, and second connection holes matching the second threaded holes (34) are arranged at both ends of the bottom support plate; the limiting plate (5) comprises an upper limit support plate and a side panel, and the side panel is perpendicular to the upper end of the upper limit support plate, and first connection holes matching the first threaded holes (33) are arranged at both ends of the upper limit support plate, the two ends of the heating plate (6) and the two ends of the side panel, and the module cover plate (7) is locked between the two side panels by bolts.

4. A heating and balancing battery module structure according to claim 3, characterized in that: The upper end of the connection frame plate (32) is provided with a mounting groove (35), and the mounting groove (35) is provided with a connecting terminal (36); the aluminum sheet connector (2) is used to connect with the positive and negative electrodes of the battery cell (1), and the outer end of the aluminum sheet connector (2) is provided with a waist-shaped hole fixed to the connecting terminal (36).

5. The battery module structure with heating balance according to claim 3, characterized in that: The four epoxy plates (9) around the battery cell module are respectively located between the side support plate and the battery cell module and between the upper limit support plate and the battery cell module.

6. A heating and equalizing battery module structure according to claim 3, characterized in that: A third threaded hole (37) is provided in the middle of the upper end of the connection frame plate (32), an expansion bracket (10) is provided between the middle of the upper ends of the two connection frame plates (32), and third connection holes matching the third threaded hole (37) are provided at both ends of the expansion bracket (10), and the expansion bracket (10) is located between the battery cell module and the module cover plate (7).

7. The battery module structure with heating balance according to claim 1, characterized in that: EVA foam (11) is arranged between the end plate (3) and the battery core module.

8. A heating and balancing battery module structure according to claim 2, characterized in that: The epoxy plate (9) and the heating plate (6) are both made of composite materials; the Mylar sheet (8) and the module cover plate (7) are both made of polyester film.

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