New energy automobile battery pack structure based on phase change material

Abstract

A new energy automobile battery pack structure based on a phase change material comprises an upper shell and a lower shell, and a plurality of battery piece loading grids are arranged in the lower shell; anti-collision grid beams are arranged on the upper surface of the upper shell and the lower surface of the lower shell, and phase change material layers are laid on the lower surface of the upper shell and the surfaces of the battery piece loading grids; the upper shell and the lower shell are fixedly connected through the mounting lugs; a ventilation temperature adjusting hole channel is formed in a side wall plate of the lower shell, and an air inlet and an air outlet are formed in an installation lug of the lower shell side by side. One end of the ventilation temperature-adjusting hole channel is communicated with the air inlet, and the other end of the ventilation temperature-adjusting hole channel is communicated with the air outlet; an electric heating layer is arranged between the surface of the battery piece loading grid and the phase change material layer; the upper shell and the lower shell are made of aluminum alloy materials. The phase change material layer is made of a paraffin-expanded graphite composite phase change material; the battery piece connecting wires in the battery piece loading grids are wrapped by an insulating material, the insulating material adopts a glass fiber reinforced epoxy resin matrix composite material, and a wrapping mode is adopted.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy vehicles, and in particular relates to a new energy vehicle battery pack structure based on phase change materials. Background Art

[0002] The current mainstream battery pack structure is mainly composed of three layers: battery pack → battery module → battery cell, and the thermal treatment performance of the battery pack directly determines the overall performance of the battery. Especially in northern regions, there is a huge difference in ambient temperature between winter and summer, and ambient temperature will also become a key constraint affecting battery performance. Therefore, in order to overcome the impact of ambient temperature factors on battery performance, it is necessary to design an effective thermal treatment solution for the battery pack from a structural level. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a new energy vehicle battery pack structure based on phase change materials, which can adjust the battery pack temperature according to different ambient temperatures, reduce the impact of ambient temperature factors on battery performance, and ensure the stable performance of the battery.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new energy vehicle battery pack structure based on phase change material, including an upper shell and a lower shell, the upper shell and the lower shell are snap-fitted and installed together; a plurality of battery cell loading grids are arranged inside the lower shell; an upper anti-collision grid beam is arranged on the upper surface of the upper shell; a lower anti-collision grid beam is arranged on the lower surface of the lower shell; an upper phase change material layer is laid on the lower surface of the upper shell; and a lower phase change material layer is laid on the surface of the battery cell loading grid.

[0005] Four upper mounting ears are evenly arranged on the edge of the upper shell, and four lower mounting ears are evenly arranged on the edge of the lower shell; the positions of the upper mounting ears correspond to the lower mounting ears one by one, and the upper mounting ears are fixedly connected and matched with the lower mounting ears by a bolt assembly.

[0006] A ventilation and temperature regulating hole is opened inside the side wall plate of the lower shell, and an air inlet and an air outlet are arranged in parallel on the lower mounting ear; the air inlet side of the ventilation and temperature regulating hole is connected to the air inlet, and the air outlet side of the ventilation and temperature regulating hole is connected to the air outlet; the air inlet is externally connected to a cooling fan.

[0007] An electric heating layer is arranged between the lower phase change material layer and the surface of the battery cell loading grid.

[0008] The upper shell and the lower shell are both made of aluminum alloy.

[0009] The upper phase change material layer and the lower phase change material layer are both made of paraffin-expanded graphite composite phase change material.

[0010] The battery cell connecting wires in the battery cell loading grid are wrapped by insulating material, the insulating material is made of glass fiber reinforced epoxy resin-based composite material, and the wrapping method is wrapping.

[0011] Beneficial effects of the utility model:

[0012] The new energy vehicle battery pack structure based on phase change materials of the utility model can adjust the temperature of the battery pack according to different ambient temperatures, reduce the influence of ambient temperature factors on battery performance, and ensure stable battery performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional schematic diagram of a new energy vehicle battery pack structure based on phase change materials of the utility model;

[0014] Figure 2 This is a cross-sectional schematic diagram of a new energy vehicle battery pack structure based on phase change materials according to the utility model;

[0015] Figure 3 It is a three-dimensional schematic diagram of the upper shell of the utility model;

[0016] Figure 4 It is a three-dimensional schematic diagram of the lower shell of the utility model;

[0017] In the figure, 1 is an upper shell, 2 is a lower shell, 3 is a battery cell loading grid, 4 is an upper anti-collision grid beam, 5 is a lower anti-collision grid beam, 6 is an upper phase change material layer, 7 is a lower phase change material layer, 8 is an upper mounting ear, 9 is a lower mounting ear, 10 is a ventilation and temperature control channel, 11 is an air inlet, 12 is an air outlet, and 13 is an electric heating layer. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figures 1 to 4 As shown, a new energy vehicle battery pack structure based on phase change material includes an upper shell 1 and a lower shell 2, wherein the upper shell 1 and the lower shell 2 are snap-fitted and installed; a plurality of battery cell loading compartments 3 are arranged inside the lower shell 2; an upper anti-collision grid beam 4 is arranged on the upper surface of the upper shell 1; a lower anti-collision grid beam 5 is arranged on the lower surface of the lower shell 2; an upper phase change material layer 6 is laid on the lower surface of the upper shell 1; and a lower phase change material layer 7 is laid on the surface of the battery cell loading compartment 3.

[0020] Four upper mounting ears 8 are evenly arranged on the edge of the upper shell 1, and four lower mounting ears 9 are evenly arranged on the edge of the lower shell 2; the positions of the upper mounting ears 8 and the lower mounting ears 9 correspond one to one, and the upper mounting ears 8 and the lower mounting ears 9 are fixedly connected and matched by a bolt assembly.

[0021] A ventilation and temperature control hole 10 is provided inside the side wall plate of the lower shell 2, and an air inlet 11 and an air outlet 12 are arranged in parallel on the lower mounting ear 9; the air inlet side of the ventilation and temperature control hole 10 is connected to the air inlet 11, and the air outlet side of the ventilation and temperature control hole 10 is connected to the air outlet 12; the air inlet 11 is externally connected to a cooling fan

[0022] An electric heating layer 13 is provided between the lower phase change material layer 7 and the surface of the battery cell loading grid 3 .

[0023] The upper shell 1 and the lower shell 2 are both made of aluminum alloy.

[0024] The upper phase change material layer 6 and the lower phase change material layer 7 are both made of paraffin-expanded graphite composite phase change material.

[0025] The cell connection wires in the cell loading compartment 3 are wrapped with insulating material, the insulating material is made of glass fiber reinforced epoxy resin-based composite material, and the wrapping method is wrapping. Specifically, good insulation of the cell connection wires is one of the core components to ensure stable battery performance.

[0026] In this embodiment, the overall size of the battery pack formed by the buckling of the upper shell 1 and the lower shell 2 is 2000mm×1000mm×600mm (length×width×height), the single beam thickness of the upper anti-collision grid beam 4 and the lower anti-collision grid beam 5 is 40mm, and the single beam height is 20mm; the radius of the ventilation and temperature regulating duct 10 is 20mm, and the materials of the upper shell 1 and the lower shell 2 are both 6063 aluminum alloy.

[0027] When the new energy vehicle battery pack adopts the solution of the present invention, when the temperature inside the battery pack is high, the excess heat will be absorbed and stored by the upper phase change material layer 6 and the lower phase change material layer 7. When the external ambient temperature is low, the upper phase change material layer 6 and the lower phase change material layer 7 will release the stored heat to adjust the temperature inside the battery pack to make it relatively constant.

[0028] When the energy storage of the upper phase change material layer 6 and the lower phase change material layer 7 reaches the upper limit, the cooling fan is started to blow air into the ventilation and temperature regulating duct 10. As the air flows in the ventilation and temperature regulating duct 10, the excess heat in the battery pack will be carried away by the flowing air and finally discharged from the battery pack through the air outlet 12, thereby preventing the temperature in the battery pack from being too high and ensuring that the battery performance is in a relatively stable state.

[0029] In cold winter, due to the low external environment, in order to ensure relatively stable battery performance, the electric heating layer 13 can be activated according to the actual temperature of the external environment. The electric heating layer 13 can adjust the temperature inside the battery pack to prevent the temperature inside the battery pack from being too low and affecting the battery performance.

[0030] The solutions in the embodiments are not intended to limit the protection scope of the present utility model. All equivalent implementations or changes that do not deviate from the protection scope of the present utility model are included in the protection scope of the present utility model.

Claims

1. A new energy vehicle battery pack structure based on phase change material, characterized in that: It comprises an upper shell and a lower shell, wherein the upper shell is snap-fitted with the lower shell; a plurality of battery cell loading compartments are arranged inside the lower shell; an upper anti-collision grid beam is arranged on the upper surface of the upper shell; a lower anti-collision grid beam is arranged on the lower surface of the lower shell; an upper phase change material layer is laid on the lower surface of the upper shell; and a lower phase change material layer is laid on the surface of the battery cell loading compartment.

2. According to claim 1, a new energy vehicle battery pack structure based on phase change material is characterized in that: Four upper mounting ears are evenly arranged on the edge of the upper shell, and four lower mounting ears are evenly arranged on the edge of the lower shell; the positions of the upper mounting ears correspond to the lower mounting ears one by one, and the upper mounting ears are fixedly connected and matched with the lower mounting ears by a bolt assembly.

3. A new energy vehicle battery pack structure based on phase change material according to claim 2, characterized in that: A ventilation and temperature regulating hole is opened inside the side wall plate of the lower shell, and an air inlet and an air outlet are arranged in parallel on the lower mounting ear; the air inlet side of the ventilation and temperature regulating hole is connected to the air inlet, and the air outlet side of the ventilation and temperature regulating hole is connected to the air outlet, and the air outlet is externally connected to a cooling fan.

4. The new energy vehicle battery pack structure based on phase change material according to claim 1, characterized in that: An electric heating layer is arranged between the lower phase change material layer and the surface of the battery cell loading grid.

5. The new energy vehicle battery pack structure based on phase change material according to claim 1, characterized in that: The upper shell and the lower shell are both made of aluminum alloy.

6. The new energy vehicle battery pack structure based on phase change material according to claim 1, characterized in that: The upper phase change material layer and the lower phase change material layer are both made of paraffin-expanded graphite composite phase change material.

7. The new energy vehicle battery pack structure based on phase change material according to claim 1, characterized in that: The battery cell connecting wires in the battery cell loading grid are wrapped by insulating material, the insulating material is made of glass fiber reinforced epoxy resin-based composite material, and the wrapping method is wrapping.

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