Battery pack provided with transverse and longitudinal beams and electric vehicle

Abstract

The utility model provides a battery pack with transverse and longitudinal beams and an electric car, which belong to the technical field of batteries, and comprise a frame, a plurality of first longitudinal beams are arranged in the frame, and the plurality of first longitudinal beams are parallel to one another; a plurality of cross beams are arranged between every two adjacent first longitudinal beams or between the adjacent frames and the first longitudinal beams. A plurality of first longitudinal beams are arranged in a frame, and the first longitudinal beams are parallel to one another; a plurality of cross beams are arranged between the two adjacent first longitudinal beams or between the adjacent frame and the first longitudinal beams, and the first longitudinal beams and the cross beams are arranged in the frame, so that the frame is reinforced, the frame rigidity of the battery pack is enhanced, larger local stress can be borne, and the rigidity in the Z direction (namely the height of the battery pack) is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery technical field, and particularly relates to a battery pack provided with horizontal and vertical beams and an electric car. BACKGROUND

[0002] Cell To Pack (CTP) is an advanced battery pack design, and its core advantage lies in simplifying the assembly process of the battery pack, improving the energy density, reducing the production cost, and enhancing the reliability of the battery. The design concept and technical advantage of the CTP battery pack make it have a broad application prospect in electric vehicles, smart phones and other mobile devices. With the continuous progress of technology and the reduction of cost, it is expected that the CTP battery pack will play an increasingly important role in the future battery technology field.

[0003] The battery cells of the CTP battery pack are generally connected by the bottom surface of the battery cell and the liquid cooling plate or the bottom guard through adhesive connection. However, the liquid cooling plate and the bottom guard plate are usually flat structures, and the Z-direction stiffness is weak, which leads to the problems of weak stiffness of the battery pack system and large local stress. At the same time, since the bottom surface of the battery cell is directly connected with the liquid cooling plate or the bottom guard through adhesive connection, the explosion-proof valve of the battery cell cannot be designed at the bottom of the battery cell. SUMMARY

[0004] In view of the above problems, the utility model provides a battery pack provided with horizontal and vertical beams, which comprises a frame, a plurality of first vertical beams are arranged in the frame, and the plurality of first vertical beams are parallel to each other, and a plurality of horizontal beams are arranged between adjacent two first vertical beams and / or between the frame and the first vertical beam adjacent thereto.

[0005] Further, the inner surface of the frame and the two ends of the first vertical beam are welded or adhered, the two ends of the horizontal beam and the surface of the first vertical beam are welded or adhered, and / or the two ends of the horizontal beam are welded or adhered to the surface of the first vertical beam and the inner surface of the frame adjacent thereto.

[0006] Further, the battery pack further comprises a second vertical beam, the second vertical beam is parallel to the first vertical beam, the second vertical beam is installed in the groove on the lower surface of the horizontal beam between the adjacent two first vertical beams, and / or the second vertical beam is installed in the groove on the lower surface of the horizontal beam between the frame and the first vertical beam adjacent thereto.

[0007] Further, the surface of the second vertical beam is welded or adhered to the groove on the lower surface of the horizontal beam, and the two ends of the second vertical beam are welded or adhered to the inner surface of the frame.

[0008] Further, the cross section of the first vertical beam is a "convex" structure.

[0009] Further, the first vertical beam is a solid or a cavity is formed in the first vertical beam.

[0010] Further, the battery pack further comprises a cell, the cell is placed in the space surrounded by the first longitudinal beam and the cross beam, and / or the cell is placed in the space surrounded by the frame, the first longitudinal beam and the cross beam.

[0011] Further, the cell is fixedly installed on the first longitudinal beam by glue, or the cell is fixedly installed on the first longitudinal beam and the frame by glue.

[0012] Further, the cell is connected with the two adjacent first longitudinal beams and the cross beam between the two first longitudinal beams by gluing or welding, or the cell is connected with the adjacent first longitudinal beam and the frame and the cross beam between the first longitudinal beam and the frame by gluing or welding.

[0013] An electric vehicle comprises a vehicle body and the above-mentioned battery pack, and the battery pack is installed on the vehicle body.

[0014] The utility model discloses beneficial effects:

[0015] 1. The frame is provided with a plurality of first longitudinal beams, and the plurality of first longitudinal beams are parallel to each other. A plurality of cross beams are arranged between the two adjacent first longitudinal beams or between the adjacent frame and the first longitudinal beam. By arranging the first longitudinal beam and the cross beam in the frame, the frame is reinforced, the rigidity of the frame of the battery pack is enhanced, the local stress that can be borne is increased, and the rigidity in the Z direction (i.e. the height of the battery pack) is enhanced.

[0016] 2. The battery pack further comprises a second longitudinal beam, the second longitudinal beam is parallel to the first longitudinal beam, and the second longitudinal beam is installed in the groove in the lower surface of the cross beam. With the increase of one second longitudinal beam, one row of cell groups can be added. The two adjacent cell groups are in contact with the second longitudinal beam and are pasted by structural glue. The second longitudinal beam provides sufficient rigidity, greatly enhances the rigidity and strength of the CTP battery pack system, and improves the mechanical properties.

[0017] 3. The transverse and longitudinal beam structure of the utility model is applicable to double-row cell groups, can be applicable to single-row cell groups by removing the second longitudinal beam, and can be applicable to multi-row cell groups by increasing the number of second longitudinal beams. That is, the universal connection of cell groups with different rows can be realized by removing or increasing the number of second longitudinal beams. The universality of the transverse and longitudinal beam structure is realized.

[0018] 4. The cell is fixedly installed on the first longitudinal beam by glue. An explosion-proof valve is installed on the cell. The explosion-proof valve is located on the surface of the cell facing the second longitudinal beam. The middle position of the bottom of the cell is in a suspended state by the first longitudinal beam and the cross beam. In this state, the explosion-proof valve can face downward in addition to facing upward or facing two sides. The diversity of the direction of the explosion-proof valve is increased, and more situations are adapted.

[0019] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0021] Figure 1 The overall structure schematic diagram of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0022] Figure 2 Another schematic diagram of the overall structure of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0023] Figure 3 The partial structure schematic diagram of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0024] Figure 4 The partial structure schematic diagram of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0025] Figure 5 The partial structure schematic diagram of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0026] Figure 6 The partial structure schematic diagram of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0027] Figure 7 The partial structure schematic diagram of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0028] Figure 8 The partial structure schematic diagram of the battery pack provided with the transverse and longitudinal beams in the embodiment of the present application is shown.

[0029] In the drawings, 1, cell; 2, first longitudinal beam; 3, transverse beam; 4, second longitudinal beam; 5, frame; 6, explosion-proof valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely explained in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] Embodiment 1,

[0032] Reference Figure 1 , Figure 1 The overall structure schematic diagram of the battery pack provided with horizontal and vertical beams in the embodiments of the utility model is shown. A battery pack provided with horizontal and vertical beams comprises a frame 5, a plurality of first vertical beams 2 are arranged in the frame 5, and the plurality of first vertical beams 2 are parallel to each other; a plurality of horizontal beams 3 are arranged between adjacent two first vertical beams 2 and / or between the frame 5 and the first vertical beam 2 adjacent thereto. The first vertical beam 2 and the horizontal beam 3 of the utility model are simple in structure, easy to process, low in cost and can be mass-produced; by arranging the first vertical beam 2 and the horizontal beam 3 in the frame 5, the frame 5 is reinforced, thereby improving the system stiffness of the battery pack and being able to bear greater local stress, and the stiffness in the Z direction (i.e. the height of the battery pack) is enhanced.

[0033] In the embodiments of the utility model, the inner surface of the frame 5 and the two ends of the first vertical beam 2 are welded or glued, the two ends of the horizontal beam 3 and the surface of the first vertical beam 2 are welded or glued, and / or the two ends of the horizontal beam 3 are welded or glued with the surface of the first vertical beam 2 and the inner surface of the frame 5 adjacent thereto. Specifically, the connection form of the two ends of the horizontal beam 3 with the side surface of the first vertical beam 2 and the lower end groove of the middle part of the horizontal beam 3 with the second vertical beam 4 is not restricted and can be various forms such as welding or gluing (reference Figure 4 ).

[0034] Further, the battery pack further comprises a second vertical beam 4, the second vertical beam 4 is parallel to the first vertical beam 2, the second vertical beam 4 is installed in the groove of the lower surface of the horizontal beam 3 between the adjacent two first vertical beams 2, and / or the second vertical beam 4 is installed in the groove of the lower surface of the horizontal beam 3 between the frame 5 and the first vertical beam 2 adjacent thereto. Specifically, by increasing the second vertical beam 4, a row of group batteries 1 can be further increased, specifically, one row of group batteries 1 can be increased for each second vertical beam 4, the adjacent two group batteries 1 are in contact with the second vertical beam 4 and are pasted by structural glue, thereby improving the installation strength of the group battery 1 and the strength of the frame 5.

[0035] In the above embodiment, alternatively, another embodiment is that the groove on the lower surface of the cross beam 3 and the surface of the second longitudinal beam 4 are welded or glued, and the two ends of the second longitudinal beam 4 are welded or glued with the inner surface of the frame 5 (see Figure 2 ). Specifically, the connection form of the two ends of the cross beam 3 with the side surface of the first longitudinal beam 2 and the lower end groove of the middle part of the cross beam 3 with the second longitudinal beam 4 is not restricted, which can be welding or gluing and various forms.

[0036] Further, the cross section of the first longitudinal beam 2 is a "convex" structure. The first longitudinal beam 2 is solid or has a cavity inside. Specifically, the first longitudinal beam 2 is a convex structure, and the internal cavity of the first longitudinal beam 2 and the cross beam 3 is not limited, which can be solid or can be shaped into different cavities according to actual needs.

[0037] The battery pack further comprises a battery cell 1, which is placed in the space surrounded by the first longitudinal beam 2 and the cross beam 3, and / or the battery cell 1 is placed in the space surrounded by the frame 5, the first longitudinal beam 2 and the cross beam 3. Specifically, the internal space surrounded by the cross beam 3 and the first longitudinal beam 2 is used to place the single-row group battery cell 1 of the CTP battery pack (see Figure 6 and Figure 7 ). The large faces on both sides of the single-row group battery cell 1 are tightly attached to the cross beam 3 by the expansion force (the large faces on both sides of the battery cell 1 refer to the end faces with larger cross sections, such as the face next to the cross beam 3 as shown in Figure 3 ); the two ends of the bottom of the single-row group battery cell 1 are respectively placed on the boss of the first longitudinal beam 2 and are bonded with the boss of the first longitudinal beam 2 by heat-conducting structural glue or structural glue. The two ends of the bottom of the battery cell 1 are directly bonded with the boss of the first longitudinal beam 2, and the second longitudinal beam 4 provides sufficient rigidity, greatly enhancing the mechanical properties such as rigidity and strength of the CTP battery pack system.

[0038] In the above embodiment, alternatively, another embodiment is that the internal space surrounded by the cross beam 3 and the first longitudinal beam 2 is used to place the double-row group battery cell 1 of the CTP battery pack (see Figure 2 and Figure 3 ). The large faces on both sides of the double-row group battery cell 1 are tightly attached to the cross beam 3 by the expansion force (the large faces on both sides of the battery cell 1 refer to the end faces with larger cross sections, such as the face next to the cross beam 3 as shown in Figure 3 ); the two ends of the bottom of the double-row group battery cell 1 are respectively placed on the boss of the first longitudinal beam 2 and the upper surface of the second longitudinal beam 4, and are bonded with the boss of the first longitudinal beam 2 by heat-conducting structural glue or structural glue, and the double-row battery cell 1 is bonded with the upper surface of the second longitudinal beam 4 by heat-conducting structural glue or structural glue. The two ends of the bottom of the battery cell 1 are directly bonded with the boss of the first longitudinal beam 2 and the upper surface of the second longitudinal beam 4, and the second longitudinal beam 4 provides sufficient rigidity, greatly enhancing the mechanical properties such as rigidity and strength of the CTP battery pack system.

[0039] In the above embodiment, another optional implementation is that, as shown in Figure 3 The internal space surrounded by the cross beam 3 and the first longitudinal beam 2 is used to place three rows of battery cell groups 1. The large faces on both sides of the three rows of battery cell groups 1 are tightly attached to the cross beam 3 by the expansion force (the large faces on both sides of the battery cell group 1 refer to the end faces with relatively large cross sections, such as the face next to the cross beam 3 as shown in Figure 3 ); the two ends of the bottom of the two rows of battery cell groups 1 on both sides are respectively placed on the boss of the first longitudinal beam 2 and the upper surface of the second longitudinal beam 4, and the two ends of the bottom of the middle row of battery cell groups 1 are respectively placed on the upper surface of the second longitudinal beam 4 and are bonded with the boss of the first longitudinal beam 2 by the heat-conducting structural adhesive or the structural adhesive. The two rows of battery cell groups 1 are bonded with the upper surface of the second longitudinal beam 4 by the heat-conducting structural adhesive or the structural adhesive. The two ends of the bottom of the battery cell group 1 are directly bonded with the boss of the first longitudinal beam 2 and the upper surface of the second longitudinal beam 4, which greatly enhances the mechanical properties such as the rigidity of the CTP battery pack system.

[0040] The transverse and longitudinal beam structure of the utility model is applicable to the two rows of battery cell groups 1, can be applicable to the single row of battery cell groups 1 by removing the second longitudinal beam 4 (for reference Figure 6 ), and can be applicable to the multiple rows of battery cell groups 1 by increasing the number of the second longitudinal beam 4. That is, the universal connection of the battery cell groups 1 with different rows can be realized by removing or increasing the number of the second longitudinal beam 4. The universality of the transverse and longitudinal beam structure is realized.

[0041] Referring to Figure 2 , the battery cell group 1 and the two adjacent first longitudinal beams 2 and the cross beam 3 between the two first longitudinal beams 2 are connected by gluing or welding, or the battery cell group 1 and the adjacent first longitudinal beam 2 and the cross beam 3 between the first longitudinal beam 2 and the frame 5 are connected by gluing or welding. The explosion-proof valve 6 is installed on the battery cell group 1, and the explosion-proof valve 6 is located on the surface of the battery cell group 1 facing the second longitudinal beam 4. Specifically, the middle position of the bottom of the battery cell group 1 is in a suspended state by the first longitudinal beam 2 and the cross beam 3, so that the explosion-proof valve 6 can also face downward in addition to upward or to both sides. The diversity of the direction of the explosion-proof valve 6 is increased, thereby adapting to more situations.

[0042] Embodiment 2,

[0043] A trolley car includes a car body and the battery pack of embodiment 1, and the battery pack is installed on the car body.

[0044] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A battery pack provided with cross beams, characterized by, The frame (5) is provided with a plurality of first longitudinal beams (2) which are parallel to each other, and a plurality of cross beams (3) are arranged between two adjacent first longitudinal beams (2) and / or between the frame (5) and the first longitudinal beam (2) adjacent thereto; the cross section of the first longitudinal beam (2) is in the shape of a "convex" character.

2. The battery pack provided with longitudinal and cross beams according to claim 1, wherein, the inner surface of the frame (5) and the two ends of the first longitudinal beam (2) are welded or glued, the two ends of the cross beam (3) and the surface of the first longitudinal beam (2) are welded or glued, and / or the two ends of the cross beam (3) are welded or glued with the surface of the first longitudinal beam (2) and the inner surface of the frame (5) adjacent thereto, respectively.

3. The battery pack provided with cross beams according to claim 1, characterized in that, The battery pack further comprises a second longitudinal beam (4) which is parallel to the first longitudinal beam (2), the second longitudinal beam (4) is installed in the groove on the lower surface of the cross beam (3) between two adjacent first longitudinal beams (2), and / or the second longitudinal beam (4) is installed in the groove on the lower surface of the cross beam (3) between the frame (5) and the first longitudinal beam (2) adjacent thereto.

4. The battery pack provided with longitudinal and cross beams according to claim 3, wherein, the surface of the second longitudinal beam (4) is welded or glued with the groove on the lower surface of the cross beam (3), and the two ends of the second longitudinal beam (4) are welded or glued with the inner surface of the frame (5), respectively.

5. The battery pack provided with cross beams according to claim 1, characterized in that, The first longitudinal beam (2) is solid or has a cavity inside.

6. The battery pack provided with cross beams according to any one of claims 2-5, characterized in that, The battery pack further comprises a battery cell (1) which is placed in the space surrounded by the first longitudinal beam (2) and the cross beam (3), and / or the battery cell (1) is placed in the space surrounded by the frame (5), the first longitudinal beam (2) and the cross beam (3).

7. The battery pack provided with cross beams according to claim 6, characterized in that, The battery cell (1) is connected to the two adjacent first longitudinal beams (2) and the cross beam (3) between the two first longitudinal beams (2) by gluing or welding, or the battery cell (1) is connected to the adjacent first longitudinal beam (2) and the frame (5) and the cross beam (3) between the first longitudinal beam (2) and the frame (5) by gluing or welding.

8. The battery pack provided with cross beams according to claim 6, characterized in that, An explosion-proof valve (6) is installed on the battery cell (1), and the explosion-proof valve (6) is located on the surface of the battery cell (1) facing the second longitudinal beam (4).

9. An electric vehicle, characterized by The vehicle body is provided with the battery pack according to any one of claims 1-8.

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