High-strength battery pack shell structure for vehicle

Abstract

The utility model discloses a high-strength vehicle battery pack shell structure, relates to the technical field of battery shells, and solves the problems that although an existing power battery shell and an all-metal shell are high in strength, the corresponding insulativity is poor, and potential safety hazards easily exist under the conditions of battery core liquid leakage and the like. Comprising a lower shell and an upper shell, the lower shell comprises an outer frame and an insulating inner shell, a plurality of equal-height rib plates are connected to a bottom plate of the insulating inner shell, and battery cells are installed in the insulating inner shell and abut against the equal-height rib plates; the outer frame is arranged outside the insulating inner shell in a sleeving manner, the upper shell is detachably connected to the outer frame, the upper shell comprises a cooling plate on the lower side, and the cooling plate abuts against the upper side of the battery cell. The outer frame and the insulating inner shell are arranged, the outer frame improves the strength of the battery shell, the insulating inner shell improves the internal insulating property, and the equal-height rib plates are arranged to form the cavity in the lower part of the insulating inner shell, so that leaked liquid is prevented from being in contact with a battery cell, and the effect of improving the safety of the battery shell is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery shells, and in particular to a high-strength vehicle battery pack shell structure. Background Art

[0002] At present, energy and environmental protection issues are the focus of great social attention. New energy vehicles have been rapidly developed and applied in this context. In the development of new energy vehicles, batteries are an important component. With the development of the times, the need for energy conservation and environmental protection has promoted their development and application. Improving the quality of batteries and optimizing the production process are of great significance to promoting the development of the new energy industry.

[0003] However, the existing power battery casing, although the all-metal casing has high strength, has poor corresponding insulation properties and needs to be improved through insulating coating and other means. It is easy to have safety hazards in the event of battery cell leakage. Utility Model Content

[0004] The purpose of the utility model is to provide a high-strength vehicle battery pack shell structure, which is provided with an outer frame and an insulating inner shell, wherein the outer frame improves the strength of the battery shell, the insulating inner shell improves the internal insulation performance, and equal-height ribs are provided to form a cavity at the lower part of the insulating inner shell to reduce leakage contact with the battery cell, etc. A cooling plate is provided to provide a cooling effect, thereby improving the safety of the battery shell.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A high-strength vehicle battery pack shell structure includes a lower shell and an upper shell, the lower shell includes an outer frame and an insulating inner shell, a plurality of equal-height ribs are connected to the bottom plate of the insulating inner shell, and a battery cell is installed in the insulating inner shell and abuts against the equal-height ribs; the outer frame is sleeved outside the insulating inner shell, and the upper shell is detachably connected to the outer frame, and the upper shell includes a cooling plate on the lower side, and the cooling plate abuts against the upper side of the battery cell.

[0007] By adopting the above technical solution, the outer frame improves the strength of the battery shell, the insulating inner shell improves the internal insulation performance, and equal-height ribs are arranged to form a cavity at the bottom of the insulating inner shell to reduce the danger of leakage contacting the battery cells, etc. At the same time, a cooling plate is arranged to provide a cooling effect to cool the overheating situation and improve the safety of the battery shell.

[0008] Furthermore, the outer frame is a hollow metal frame.

[0009] By adopting the above technical solution, the strength is improved while the overall mass of the shell is reduced as much as possible.

[0010] Furthermore, a sponge sheet is connected to the bottom of the insulating inner shell between adjacent ribs of equal height to absorb leaked liquid.

[0011] By adopting the above technical solution, the corresponding leaked liquid is absorbed by the sponge sheet, the danger caused by the leakage flow and the like is reduced, and the safety of the battery is further improved.

[0012] Furthermore, the cooling plate is inserted into the upper shell in a horizontal direction.

[0013] By adopting the above technical solution, the connection and installation of the cooling plate are facilitated.

[0014] Furthermore, a plurality of positioning blocks are connected to the lower shell, and positioning grooves matching the positioning blocks are provided on the cooling plate.

[0015] By adopting the above technical solution, the stability of the cooling plate position after installation is improved.

[0016] Furthermore, one end of the cooling plate extends out of the lower shell and is connected to the coolant inlet and the coolant outlet, and a coolant flow channel with two ends respectively connected to the coolant inlet and the coolant outlet is provided in the cooling plate.

[0017] By adopting the above technical solution, the coolant is introduced into and discharged from the cooling plate, thereby realizing the circulation of the coolant.

[0018] Furthermore, there are two coolant inlets / coolant outlets, which are symmetrically arranged on both sides of the coolant outlet / coolant inlet, and an integral connecting block is connected to the cooling plate. The coolant inlet and the coolant outlet are opened on the integral connecting block. The connecting block is used to connect a connecting pipe. The connecting pipe includes a plug at the end. The plug is provided with three plug heads, which are respectively plugged into each coolant inlet and coolant outlet.

[0019] By adopting the above technical solution, two coolant inlets and one coolant outlet are connected at one time through a connecting pipe, which facilitates the connection between the coolant pipe and the cooling plate, realizes a symmetrical cooling effect on both sides of the battery, and improves the uniformity of cooling.

[0020] Furthermore, two coolant inlets are provided, and the coolant enters the coolant flow channel through the coolant inlets and finally flows out from the coolant outlet in the middle.

[0021] By adopting the above technical solution, the coolant enters the cooling plate through the coolant inlets on both sides and finally flows out from the coolant outlet in the middle, thereby improving the cooling effect at the periphery, making it easier to deal with the problem that the electrodes at both ends of the battery cell heat up more seriously than in the middle, and improving the uniformity of cooling.

[0022] In summary, the utility model has the following beneficial effects:

[0023] The lower shell includes an outer frame and an insulating inner shell. The outer frame is a hollow metal frame, which improves the strength of the battery shell and minimizes the overall mass of the shell. The insulating inner shell improves the internal insulation performance, and is provided with equal-height ribs to form a cavity at the bottom of the insulating inner shell to reduce the risk of leakage contacting the battery cell, and a sponge sheet is connected at the bottom of the insulating inner shell between adjacent equal-height ribs to absorb leakage, reduce the risk of leakage flow, and further improve the safety of the battery.

[0024] At the same time, a cooling plate is provided to provide a cooling effect, cool down the overheating situation, and improve the safety of the battery housing. The cooling plate is plugged into the upper housing in a horizontal direction, which is convenient for the connection and installation of the cooling plate, and the stability of the cooling plate position after installation is improved by the positioning block;

[0025] Two coolant inlets and one coolant outlet are connected at one time through a connecting pipe, which facilitates the connection between the coolant pipe and the cooling plate and realizes symmetrical cooling effect on both sides of the battery. The coolant enters the cooling plate at the coolant inlets on both sides and finally flows out from the coolant outlet in the middle, thereby improving the cooling effect at the periphery, making it easier to deal with the problem that the electrodes at both ends of the battery cell heat up more seriously than in the middle, thereby improving the uniformity of cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the overall structure of a high-strength vehicle battery pack shell structure of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the insulating inner shell part of a high-strength vehicle battery pack shell structure of the utility model;

[0029] Figure 3 It is a structural schematic diagram of a cooling plate portion in a high-strength vehicle battery pack shell structure of the utility model.

[0030] In the figure, 1, lower shell; 11, outer frame; 12, insulating inner shell; 121, equal height ribs; 122, sponge sheet; 123, positioning block; 2, upper shell; 3, cooling plate; 31, coolant inlet; 32, coolant outlet; 33, coolant flow channel; 34, integral connecting block. DETAILED DESCRIPTION

[0031] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation of the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] A high-strength vehicle battery pack shell structure, such as Figure 1 As shown, it includes a lower shell 1 and an upper shell 2. The lower shell 1 includes an outer frame 11 and an insulating inner shell 12. The outer frame 11 is a hollow metal frame, which improves the strength while reducing the overall mass of the shell as much as possible.

[0033] like Figure 2 As shown, a plurality of equal-height ribs 121 are connected to the bottom plate of the insulating inner shell 12, and the battery cells are installed in the insulating inner shell 12 and abut against the equal-height ribs 121; a sponge sheet 122 is connected to the bottom of the insulating inner shell 12 between adjacent equal-height ribs 121 to absorb the leaked liquid, so as to reduce the danger caused by the flow of the leaked liquid.

[0034] The outer frame 11 is sleeved outside the insulating inner shell 12 and can be fixed by screws. The upper shell 2 is detachably connected to the outer frame 11 by screws. The upper shell 2 includes a cooling plate 3 on the lower side, and the cooling plate 3 abuts against the upper side of the battery cell.

[0035] like Figure 2 and Figure 3 As shown, the cooling plate 3 is inserted into the upper shell 2 in the horizontal direction (extension plates are extended outward from the upper parts of both sides of the cooling plate 3, and are slidably connected to the upper shell 2 along the slide grooves on both sides of the upper shell 2); a plurality of positioning blocks 123 can be connected to the top of the insulating inner shell 12, and positioning grooves compatible with the positioning blocks 123 are provided on the cooling plate 3 to improve stability after installation.

[0036] like Figure 3 As shown, one end of the cooling plate 3 extends out of the lower shell 1 and is connected to the coolant inlet 31 and the coolant outlet 32. The cooling plate 3 is also provided with a coolant flow channel 33 whose two ends are respectively connected to the coolant inlet 31 and the coolant outlet 32, thereby realizing the introduction and discharge of the coolant in the cooling plate 3 and the circulation of the coolant.

[0037] like Figure 3As shown, there are two coolant inlets 31 / coolant outlets 32, which are symmetrically arranged on both sides of the coolant outlet 32 / coolant inlet 31, and the cooling plate 3 is connected to an integral connecting block 34. The coolant inlet 31 and the coolant outlet 32 ​​are opened on the integral connecting block 34. The connecting block is used to connect a connecting pipe by means of screws or the like. The connecting pipe includes a plug at the end, and three plug heads are provided on the plug, which are respectively plugged into each coolant inlet 31 and the coolant outlet 32. The two coolant inlets 31 and one coolant outlet 32 ​​are connected at one time through the connecting pipe, which is convenient for connection; it can also be provided with three independent pipe openings to connect pipelines respectively;

[0038] In this embodiment, two coolant inlets 31 are provided, and the coolant enters the coolant flow channel 33 through the coolant inlet 31. The coolant flow channel 33 is serpentine and can be provided with partitions inside to separate multiple parallel capillary flow channels, and finally flows out from the coolant outlet 32 ​​in the middle. The coolant enters the cooling plate 3 through the coolant inlets 31 on both sides, and finally flows out from the coolant outlet 32 ​​in the middle, so as to cope with the problem that the electrodes at both ends of the battery cell heat up more seriously than in the middle, and improve the cooling uniformity.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. A high-strength vehicle battery pack housing structure, characterized in that: The invention comprises a lower shell (1) and an upper shell (2), wherein the lower shell (1) comprises an outer frame (11) and an insulating inner shell (12), a plurality of equal-height ribs (121) are connected to the bottom plate of the insulating inner shell (12), and a battery cell is installed in the insulating inner shell (12) and abuts against the equal-height ribs (121); the outer frame (11) is sleeved outside the insulating inner shell (12), the upper shell (2) is detachably connected to the outer frame (11), and the upper shell (2) comprises a cooling plate (3) on the lower side, and the cooling plate (3) abuts against the upper side of the battery cell.

2. A high-strength vehicle battery pack housing structure according to claim 1, characterized in that: The outer frame (11) is a hollow metal frame.

3. A high-strength vehicle battery pack housing structure according to claim 1 or 2, characterized in that: The bottom of the insulating inner shell (12) is located between adjacent ribs (121) of equal height and connected to a sponge sheet (122) to absorb leaked liquid.

4. The high-strength vehicle battery pack housing structure according to claim 1, characterized in that: The cooling plate (3) is inserted into the upper shell (2) in a horizontal direction.

5. The high-strength vehicle battery pack housing structure according to claim 4, characterized in that: A plurality of positioning blocks (123) are connected to the lower shell (1), and positioning grooves matching the positioning blocks (123) are provided on the cooling plate (3).

6. The high-strength vehicle battery pack housing structure according to claim 1, characterized in that: One end of the cooling plate (3) extends out of the lower shell (1) and is connected to a cooling liquid inlet (31) and a cooling liquid outlet (32); a cooling liquid flow channel (33) is also provided in the cooling plate (3) with two ends respectively connected to the cooling liquid inlet (31) and the cooling liquid outlet (32).

7. A high-strength vehicle battery pack housing structure according to claim 6, characterized in that: The coolant inlet (31) / coolant outlet (32) is provided with two, which are symmetrically arranged on both sides of the coolant outlet (32) / coolant inlet (31). The cooling plate (3) is connected to an integral connecting block (34). The coolant inlet (31) and the coolant outlet (32) are provided on the integral connecting block (34). The connecting block is used to connect a connecting pipe. The connecting pipe includes a plug at the end. The plug is provided with three plug heads, which are respectively plugged into each coolant inlet (31) and the coolant outlet (32).

8. The high-strength vehicle battery pack housing structure according to claim 7, characterized in that: The coolant inlets (31) are provided with two, and the coolant enters the coolant flow channel (33) through the coolant inlets (31) and finally flows out from the coolant outlet (32) in the middle.

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