Battery pack collision barrier structure

Abstract

The utility model discloses a battery pack collision barrier structure, which belongs to the technical field of automobile safety detection and comprises a barrier base and a barrier step, the barrier base comprises a fan-shaped column, the arc of the fan-shaped column is a semicircle or a major arc, the barrier step comprises a plurality of groups of arc barriers, each arc barrier comprises an inner arc section and an outer arc section, and the inner arc section and the outer arc section are arranged in parallel. The inner arc section, the outer arc section and the fan-shaped column are concentrically arranged, the radius of the inner arc section is equal to that of the fan-shaped column, the arc wall barriers are detachably and fixedly connected with the fan-shaped column, each group of arc wall barriers comprises at least one arc wall barrier, and the arc wall barriers in the same group are the same. And the radiuses of the outer arc sections of different groups of arc barriers are different. The vehicle body boundary simulation device can simulate vehicle body boundaries of different sizes or battery packs of different sizes after collision, and is high in flexibility, good in universality and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile safety detection, in particular to a battery pack collision barrier structure. Background Art

[0002] The automobile industry is developing faster and faster, and there are more and more new energy models, including pure electric EV models, plug-in hybrid PHEV models, extended-range hybrid REV models, etc. The biggest common feature of new energy models is that they are all equipped with a high-voltage battery as a power source or auxiliary power source. Today, the penetration rate of new energy vehicles in the Chinese market has exceeded 30%. With the popularization of new energy vehicles, people are paying more and more attention to the safety of electric vehicles.

[0003] In addition, the collision safety performance of automobiles has also received extensive attention. Automobile collisions are usually divided into frontal / side / rear collisions, rollovers, and pedestrian collisions. In addition, with the rapid development of the new energy vehicle market, domestic and foreign automakers have also invested a lot of manpower and material resources in the research and development of new energy, hybrid and other vehicles. The safety performance of new energy vehicles has received more and more attention, and the phenomenon of thermal runaway of batteries after collision has also increased. How to ensure the protection of high-voltage batteries and driver and passenger safety in different collision areas, especially in the side collision of new energy vehicles, especially in the side column collision condition has become the focus of the market and society. The performance development of battery packs in the side collision conditions of new energy vehicles is the top priority. Safety is the foundation of automobiles, but compared with traditional fuel vehicles, the safety requirements of new energy vehicles are even higher, because in addition to considering the safety of the vehicle structure and occupant protection, it will also test the safety performance of the three electrics after the collision, especially the battery. Under normal circumstances, the development of battery pack collision performance needs to be carried on the whole vehicle, which is costly and has a long reaction time cycle. How to verify the safety performance of battery packs more efficiently and earlier, identify the design defects of battery packs, and avoid confusion with factors affecting the entire vehicle are issues that R&D personnel need to consider.

[0004] In the existing battery pack side pole impact simulation test, the side pole first squeezes the body and then the battery pack. For the body, it first squeezes the door system (frame), then the body boundary, and finally the battery pack. Therefore, how to simulate body systems of different sizes in the collision test is an issue worthy of attention. The existing single-pack system collision barrier cannot be adjusted and can only simulate a single-size body boundary or a single-size battery pack. It has poor flexibility and versatility. At the same time, the collision barrier has low strength and poor stability. Utility Model Content

[0005] In order to solve at least one of the problems mentioned in the above background technology, the utility model provides a battery pack collision barrier structure, which can simulate vehicle body boundaries of different sizes or battery packs of different sizes after collision, and has high flexibility, good versatility and low cost.

[0006] The specific technical solutions provided by the utility model are as follows:

[0007] A battery pack collision barrier structure is provided, comprising a barrier base and a barrier step, wherein the barrier base comprises a sector-shaped column, the arc of the sector-shaped column is a semicircle or a major arc, the barrier step comprises a plurality of groups of arc barriers, the arc barriers comprise an inner arc segment and an outer arc segment, the inner arc segment, the outer arc segment and the sector-shaped column are all concentrically arranged, the radii of the inner arc segment and the sector-shaped column are equal, the arc barriers are detachably fixedly connected to the sector-shaped column, each group of the arc barriers comprises at least one arc barrier, and the arc barriers in the same group are the same, while the radii of the outer arc segments of the arc barriers in different groups are different.

[0008] By means of the above technical scheme, the utility model sets a barrier base of a fan-shaped column and a barrier step of an arc barrier, so that in the battery pack side column collision test, different arc barriers are connected to the fan-shaped column to achieve different combinations, thereby simulating the vehicle body boundaries of different sizes or battery packs of different sizes after the collision, thereby replacing the whole vehicle collision to simulate the collision deformation of the battery pack system, with high flexibility, good versatility and low cost.

[0009] As a preferred embodiment of the above solution, the sector column is detachably fixedly connected to one of the arc barriers.

[0010] As a preferred embodiment of the above solution, the fan-shaped column is detachably fixedly connected to a plurality of the circular arc barriers in the same group.

[0011] As a preferred embodiment of the above solution, the fan-shaped column is detachably fixedly connected to a plurality of the arc barriers in different groups.

[0012] As a preferred embodiment of the above scheme, a threaded hole is formed on the arc surface of the sector column, and a threaded through hole is formed on the arc barrier, and the threaded hole and the threaded through hole are connected with bolts to realize the detachable fixed connection between the arc barrier and the sector column. According to the above scheme, the detachable fixed connection between the arc barrier and the sector column is realized by the threaded hole and the threaded through hole being connected with bolts, so that the connection between the arc barrier and the sector column is convenient and fast, and the installation and disassembly are convenient, and the combination of the sector column and the arc barriers of different sizes can be quickly realized.

[0013] As a preferred embodiment of the above scheme, the threaded holes are arranged in two rows on both sides of the arc surface of the fan-shaped column, and the threaded through holes are arranged in two rows on both sides of the arc barrier, and the two rows of threaded holes correspond to the two rows of threaded through holes.

[0014] As a preferred embodiment of the above solution, the barrier base further includes a mounting plate, the fan-shaped column is arranged on the mounting plate, and the mounting plate is provided with a plurality of vertical long waist holes. According to the above solution, by connecting bolts on the long waist holes, the mounting plate can be fixed on the collision trolley, and the collision trolley moves to realize the collision of the collision barrier with the battery pack. By moving the installation position of the bolts on the long waist holes, the height of the barrier can be adjusted to match battery packs of different positions or sizes, thereby further improving the flexibility of the collision barrier.

[0015] As a preferred embodiment of the above solution, the barrier base further comprises a transition support member, the transition support member is used to connect the mounting plate and the sector column, the transition support member is provided in a plurality of groups, and the transition support member is evenly connected to the sector column and the mounting plate. According to the above solution, the setting of the transition support member serves as a buffer between the barrier step, the sector column and the mounting plate, which can support load transfer and avoid barrier deformation during a collision test.

[0016] As a preferred embodiment of the above solution, two sides of the transition support are respectively fixedly connected to the mounting plate and the fan-shaped column.

[0017] As a preferred embodiment of the above solution, the transition support members are provided in three groups, and the three groups of transition support members are respectively fixedly connected to the upper end, middle end and lower end of the fan-shaped column. According to the above solution, the provision of the three groups of transition support members further achieves the stability of the entire barrier structure, further improves the strength and avoids deformation.

[0018] As a preferred embodiment of the above solution, the transition support member includes several layers of support plates and side plates, the side plates are fixed on both sides of the support plate, the side plates on one side of the support plate are fixedly connected to the fan-shaped column, and the side plates on the other side of the support plate are fixedly connected to the mounting plate. According to the above solution, the provision of the side plates facilitates the fixed connection between the support plate and the fan-shaped column and the mounting plate, while improving the connection strength.

[0019] As a preferred embodiment of the above solution, the transition support member includes three layers of support plates, and the three layers of support plates are respectively connected to the upper end, middle end and lower end of the side plate. According to the above solution, the provision of three layers of support plates further strengthens the connection stability between the fan-shaped column and the mounting plate, further improves the barrier strength and avoids deformation.

[0020] As a preferred embodiment of the above scheme, the long waist holes are arranged in two groups on the mounting plates on both sides of the fan-shaped column, each group of the long waist holes includes two rows of the long waist holes, and each row of the long waist holes includes a plurality of the long waist holes. According to the above scheme, the arrangement of the two groups of long waist holes makes the connection between the entire barrier structure and the collision trolley more flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a front view structural schematic diagram of the barrier base of the utility model;

[0024] Figure 3 This is a schematic structural diagram of an arc barrier of the utility model;

[0025] Figure 4 This is a schematic structural diagram of an arc barrier of the utility model;

[0026] Figure 5 This is a schematic structural diagram of an arc barrier of the utility model;

[0027] Figure 6 This is a structural schematic diagram of an installation method of the utility model;

[0028] Figure 7 This is a structural schematic diagram of an installation method of the utility model;

[0029] Figure 8 This is a structural schematic diagram of an installation method of the utility model;

[0030] Fig. 9 This is a structural schematic diagram of an installation method of the utility model;

[0031] Fig.10 This is a structural schematic diagram of an installation method of the utility model;

[0032] Fig.11 It is a schematic diagram of the state of the utility model during the collision test with the battery pack. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The following content is for reference Figures 1 to 11 .

[0035] A battery pack collision barrier structure described in the utility model includes a barrier base 1 and a barrier step 2, wherein the barrier base 1 includes a sector column 11, the arc of the sector column 11 is a semicircle or a major arc, the barrier step 2 includes a plurality of groups of arc barriers 21, the arc barriers 21 include an inner arc segment 211 and an outer arc segment 212, the inner arc segment 211 and the outer arc segment 212 are concentrically arranged with the sector column 11, the radius of the inner arc segment 211 is equal to that of the sector column 11, the arc barriers 21 and the sector column 11 are detachably fixedly connected, each group of the arc barriers 21 includes at least one arc barrier 21, and the arc barriers 21 in the same group are the same, while the radii of the outer arc segments 212 of different groups of the arc barriers 21 are different.

[0036] The utility model sets a barrier base 1 of a sector column 11 and a barrier step 2 of an arc barrier 21. In this way, in a battery pack side column collision test, different arc barriers 21 are connected to the sector column 11 to achieve different combinations, thereby simulating vehicle body boundaries of different sizes after a collision, thereby replacing the collision deformation of a battery pack system in a vehicle collision simulation, with high flexibility, good versatility and low cost.

[0037] The arc surface of the sector column 11 is formed with a threaded hole 111, and the arc barrier 21 is formed with a threaded through hole 211. The threaded hole 111 and the threaded through hole 211 are connected with bolts to realize the detachable fixed connection between the arc barrier 21 and the sector column 11. The threaded hole 111 and the threaded through hole 211 are connected with bolts to realize the detachable fixed connection between the arc barrier 21 and the sector column 11, so that the connection between the arc barrier 21 and the sector column 11 is convenient and fast, and the installation and disassembly are convenient, and the combination of the sector column 11 and the arc barriers 21 of different sizes can be quickly realized. The threaded holes 111 are arranged in two rows on both sides of the arc surface of the sector column 11, and the threaded through holes 211 are arranged in two rows on both sides of the arc barrier 21. The two rows of threaded holes 111 correspond to the two rows of threaded through holes 211. In this embodiment, each row of threaded holes 111 is provided with at least 7 to accommodate the installation of multiple arc barriers 21 in the axial direction of the sector column 11, and each row of threaded through holes 211 is provided with at least two to cooperate with the threaded holes 111, so that the arc barrier 21 and the sector column 11 are fixed stably and firmly.

[0038] The barrier base 1 also includes a mounting plate 12, and the fan-shaped column 11 is arranged on the mounting plate 12, and a plurality of vertical long waist holes 121 are provided on the mounting plate 12. By connecting bolts on the long waist holes 121, the mounting plate 12 can be installed and fixed on the collision trolley, and the collision trolley moves to realize the collision of the collision barrier with the battery pack. By moving the mounting position of the bolts on the long waist holes 121, the height of the barrier can be adjusted to match battery packs of different positions or sizes, which further improves the flexibility of the collision barrier. The long waist holes 121 are arranged in two groups on the mounting plates 12 on both sides of the fan-shaped column 11, and each group of the long waist holes 121 includes two rows of the long waist holes 121, and each row of the long waist holes 121 includes a plurality of the long waist holes 121. The provision of two groups of long waist holes 121 makes the connection between the entire barrier structure and the collision trolley more flexible and convenient.

[0039] The barrier base 1 also includes a transition support 13, and the transition support 13 is used to connect the mounting plate 12 and the fan-shaped column 11. The transition support 13 is provided with several groups, and the transition support 13 is evenly connected to the fan-shaped column 11 and the mounting plate 12. The setting of the transition support 13 serves as a buffer between the barrier step 2, the fan-shaped column 11 and the mounting plate 12, which can support load transfer and avoid barrier deformation during a collision test. The two sides of the transition support 13 are respectively fixedly connected to the mounting plate 12 and the fan-shaped column 11, and specifically, the fixing method is welding. The transition support 13 is provided with three groups, and the three groups of transition support 13 are respectively fixedly connected to the upper end, the middle end and the lower end of the fan-shaped column 11. The setting of the three groups of transition support 13 further realizes the stability of the entire barrier structure, further improves the strength and avoids deformation. The transition support member 13 includes several layers of support plates 131 and side plates 132. The side plates 132 are fixed on both sides of the support plate 131. The side plates 132 on one side of the support plate 131 are fixedly connected to the fan-shaped column 11, and the side plates 132 on the other side of the support plate 131 are fixedly connected to the mounting plate 12. According to the above scheme, the setting of the side plates 132 facilitates the fixed connection between the support plate 131 and the fan-shaped column 11 and the mounting plate 12, and at the same time improves the connection strength. The transition support member 13 includes three layers of support plates 131, and the three layers of support plates 131 are respectively connected to the upper end, the middle end and the lower end of the side plates 132. In this embodiment, there are three groups of transition support members 13, and each group of transition support members 13 is provided with three layers of support plates 131. The setting of a total of nine layers of support plates 131 further strengthens the connection stability between the fan-shaped column 11 and the mounting plate 12, further improves the barrier strength and avoids deformation.

[0040] In this embodiment, the radius of the sector column 11 is 127mm, and the radius of the arc barrier 21 is 160-230mm. Specifically, this embodiment is provided with an arc barrier 21 with a radius of 170mm, an arc barrier 21 with a radius of 200mm, and an arc barrier 21 with a radius of 230mm. The simulated side columns are standard side columns with a diameter of 254mm and non-standard side columns with a diameter greater than 254mm. The arc barrier 21 of the utility model simulates the deformation of the vehicle body boundary outside the battery pack after the side column collision, so as to replace the verification under the side column collision condition of the whole vehicle. Therefore, the inner arc segment 211, the outer arc segment 212 of the arc barrier 21 and the sector column 11 are all concentrically arranged with the side column. In the specific implementation of this embodiment, Fig.11 As shown, the battery pack 100 is composed of a battery cell (not shown), a top cover 101 and a side frame 102. The side frame is L-shaped. In an actual vehicle, the battery pack is installed on the vehicle through the lower part of the side frame. The battery pack is fixed to a rigid wall. The mounting plate 12 is fixed to the collision trolley 200 through a long waist hole 121 and bolts, and then arc barriers 21 of different layers and sizes are installed on the fan-shaped column 11 according to the length and width of the vehicle body boundary after the impact to be simulated. Specifically, when simulating a non-standard side column collision, the vehicle body boundary is flush and has a uniform width after the collision. Different layers of arc barriers 21 are installed according to the length of the vehicle body boundary (along the axial direction of the fan-shaped column, the number of layers represents the number). The fan-shaped column can be detachably fixedly connected to one of the arc barriers, such as Figure 1 As shown, the fan-shaped column can also be detachably fixedly connected with a plurality of arc barriers. Figure 6-7 As shown, when simulating a standard side pole collision, the upper and lower widths of the vehicle body boundary are different after the collision. Different layers of arc barriers 21 are installed according to the length of the vehicle body boundary, and different groups of arc barriers 21 are installed according to the different upper and lower widths of the vehicle body boundary after the collision. At the same time, since the vehicle body boundary first hits the side frame of the battery pack during the side pole collision, the upper arc barrier hits the vertical section of the L-shaped inner side of the side frame during the collision, and the lower arc barrier hits the outer side of the L-shaped horizontal section of the side frame. Therefore, the longer the horizontal section, the larger the radius of the upper arc barrier needs to be. In addition, the heights of the L-shaped inner vertical section of the side frame corresponding to the battery cells of different heights are different. The battery pack with battery cells exceeding a certain height will flip over during the collision. Therefore, the following design is made. Fig. 9The arc barriers are in the form of a combination of arc barriers, with a certain distance between the upper and lower arc barriers. The upper arc barrier simulates the collision with the top of the L-shaped inner vertical section of the side frame. There is no arc barrier at the bottom of the L-shaped inner vertical section of the side frame for collision, and the lower arc barrier collides with the outer side of the L-shaped horizontal section of the side frame. This can adapt to the situation where a high-cell battery pack flips during a collision. If the height of the L-shaped inner side of the side frame is below a certain range, there is no need to simulate the flipping of the battery pack. Arc barriers of different radii are directly pressed and contacted and installed on the fan-shaped column to simulate the collision with the outer side of the L-shaped inner side of the entire side frame, such as Figure 8 , Fig.10 shown.

[0041] In this embodiment, the collision barrier structure is installed on a universal collision trolley, and the collision trolley is pulled by a traction system to drive the collision barrier to collide with the battery pack. In other embodiments, the battery pack can also be fixed on the collision trolley, and the collision barrier structure can be fixed on a rigid wall. Then the traction system drives the collision trolley and the battery pack to move and collide with the collision barrier structure to simulate the battery pack side column collision.

[0042] In summary, a battery pack collision barrier structure of the utility model can simulate vehicle body boundaries of different sizes or battery packs of different sizes after a collision, and can also simulate side pillars of different sizes. It has high flexibility, good versatility, low cost, high strength and good stability.

[0043] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A battery pack collision barrier structure, characterized in that: It includes a barrier base and a barrier step, the barrier base includes a fan-shaped column, the arc of the fan-shaped column is a semicircle or a major arc, the barrier step includes multiple groups of arc barriers, the arc barrier includes an inner arc segment and an outer arc segment, the inner arc segment, the outer arc segment and the fan-shaped column are concentrically arranged, the radius of the inner arc segment is equal to that of the fan-shaped column, the arc barrier is detachably fixedly connected to the fan-shaped column, each group of the arc barriers includes at least one arc barrier, and the arc barriers in the same group are the same, and the outer arc segments of the arc barriers in different groups have different radii.

2. The battery pack collision barrier structure according to claim 1, characterized in that: The sector column is detachably fixedly connected to one of the circular arc barriers.

3. The battery pack collision barrier structure according to claim 1, characterized in that: The fan-shaped column is detachably fixedly connected to a plurality of the circular arc barriers in the same group.

4. The battery pack collision barrier structure according to claim 1, characterized in that: The fan-shaped column is detachably fixedly connected to a plurality of circular arc barriers in different groups.

5. The battery pack collision barrier structure according to claim 1, characterized in that: A threaded hole is formed on the arc surface of the sector column, and a threaded through hole is formed on the arc barrier. The threaded hole and the threaded through hole are connected with bolts to achieve a detachable fixed connection between the arc barrier and the sector column.

6. The battery pack collision barrier structure according to claim 5, characterized in that: The threaded holes are arranged in two rows on both sides of the arc surface of the sector column, and the threaded through holes are arranged in two rows on both sides of the arc barrier. The two rows of threaded holes correspond to the two rows of threaded through holes.

7. The battery pack collision barrier structure according to claim 1, characterized in that: The barrier base also includes a mounting plate, the fan-shaped column is arranged on the mounting plate, and the mounting plate is provided with a plurality of vertical long waist holes.

8. The battery pack collision barrier structure according to claim 7, characterized in that: The barrier base also includes a transition support member, which is used to connect the mounting plate and the fan-shaped column. The transition support member is provided in a plurality of groups, and the transition support members are evenly connected to the fan-shaped column and the mounting plate.

9. The battery pack collision barrier structure according to claim 8, characterized in that: The two sides of the transition support are respectively fixedly connected to the mounting plate and the fan-shaped column.

10. The battery pack collision barrier structure according to claim 9, characterized in that: The transition support members are provided in three groups, and the three groups of transition support members are respectively fixedly connected to the upper end, the middle end and the lower end of the fan-shaped column.

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