Battery pack fixing beam

Abstract

The utility model belongs to the technical field of battery support, specifically disclose battery pack fixed beam, including left crossbeam, right crossbeam, upper longitudinal beam, lower longitudinal beam and fixed plate, left crossbeam and upper longitudinal beam vertical fixed form the region of installing first battery module, upper longitudinal beam and right crossbeam vertical fixed form the region of installing high pressure device box, right crossbeam and lower longitudinal beam vertical fixed form the region of installing second battery module, the fixed plate is L -shaped, and the left side of horizontal side of fixed plate is connected with the right side of upper longitudinal beam, and the downside of vertical side of fixed plate is connected with right crossbeam, be equipped with first aperture on upper longitudinal beam, be equipped with second aperture on right crossbeam, and the width of second aperture is greater than the width of fixed plate, the fixed plate is used for fixing the BMS board of battery pack, and the downside of high pressure device box is equipped with opening. Can realize two battery module and high voltage module's electric connection, arrange battery module and high voltage module separately in different area, effectively reduce the whole package heat transfer.

Description

Technical Field

[0001] This utility model belongs to the field of battery bracket technology, and in particular relates to a battery pack fixing beam. Background Technology

[0002] In recent years, with the acceleration of electrification in my country, lithium-ion batteries have been widely used not only in energy storage, consumer electronics, and new energy vehicles, but also in electric two-wheelers and motorcycles. Currently, the lithium battery packs used in electric motorcycles on the market are mainly products with voltages below 72V, and the requirements for capacity and rate performance are relatively low. By connecting multiple cells in series to form a battery module, the power needs of electric motorcycles can be met. These battery packs have regular dimensions and the fixing method with the vehicle is relatively simple.

[0003] However, as market users have increasingly higher requirements for the performance, charging time, range, and lightweighting of electric motorcycles, electric motorcycle battery packs are gradually developing towards higher energy density, higher rate performance, and higher capacity. A single battery module can no longer meet the needs of the battery pack, and it is often necessary to use two battery modules connected in series and parallel. The increase in battery pack capacity and the improvement in rate performance also place higher demands on the thermal management of the battery pack. The design of the battery pack also needs to meet the lightweighting requirements under the constraints of the frame, making the arrangement and fixation of the battery pack more difficult. Utility Model Content

[0004] The purpose of this utility model is to provide a battery pack fixing beam that enables electrical connection between two battery modules and a high-voltage module, and separates the battery modules and the high-voltage module in different areas, effectively reducing heat transfer of the entire pack.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a battery pack fixing beam, including a left crossbeam, a right crossbeam, an upper longitudinal beam, a lower longitudinal beam, and a fixing plate. The left crossbeam and the upper longitudinal beam are vertically fixed to form an area for installing a first battery module. The upper longitudinal beam and the right crossbeam are vertically fixed to form an area for installing a high-voltage device box. The right crossbeam and the lower longitudinal beam are vertically fixed to form an area for installing a second battery module. The fixing plate is L-shaped. The left side of the horizontal side of the fixing plate is connected to the right side of the upper longitudinal beam, and the lower side of the vertical side of the fixing plate is connected to the right crossbeam. The upper longitudinal beam has a first opening, and the right crossbeam... The upper part has a second opening, the width of which is greater than the width of the fixing plate; the first battery module is supported by the left crossbeam and fixed to the upper longitudinal beam, the high-voltage device box is supported by the right crossbeam and fixed to the upper longitudinal beam and the right crossbeam, and the second battery module is fixed to the right crossbeam and the lower longitudinal beam; the fixing plate is used to fix the BMS board of the battery pack, and the lower side of the high-voltage device box has an opening, the opening is directly opposite the fixing plate and the fixing plate can be located inside the high-voltage device box; the first opening is used for the routing of the high-voltage busbar and sampling harness of the first battery module, and the second opening is used to connect to the second battery module.

[0006] Furthermore, an upper suspension beam is provided on the upper side of the upper longitudinal beam, a right suspension beam is provided on the right side of the right crossbeam, and a lower suspension beam is provided on the lower side of the lower longitudinal beam. The upper suspension beam, right suspension beam, and lower suspension beam are respectively used for suspension and fixation with the vehicle frame. Suspension through holes are provided in the upper suspension beam, right suspension beam, and lower suspension beam.

[0007] Furthermore, the upper longitudinal beam, the right transverse beam, and the lower longitudinal beam are respectively arranged perpendicularly to the upper suspension beam, the right suspension beam, and the lower suspension beam.

[0008] Furthermore, the thicknesses of the upper suspension beam, right suspension beam, and lower suspension beam are three times the thicknesses of the upper longitudinal beam, right transverse beam, and lower longitudinal beam, respectively.

[0009] Furthermore, the fixing plate is 10-15mm higher than the right crossbeam.

[0010] Furthermore, reinforcing ribs connect the left crossbeam, upper longitudinal beam, right crossbeam, and lower longitudinal beam.

[0011] Furthermore, a left suspension beam is provided at the position of the reinforcing rib between the left crossbeam and the lower longitudinal beam. The left suspension beam is used to suspend and fix to the vehicle frame. The left suspension beam is provided with a suspension through hole.

[0012] Furthermore, the fixing plate is provided with a plurality of positioning pins, the positioning pins are provided with a first connecting hole, the BMS plate is provided with a second connecting hole opposite to the first connecting hole, and the first connector fixes the BMS plate to the fixing plate through the first connecting hole and the second connecting hole.

[0013] Furthermore, the upper longitudinal beam has several third connecting holes on its upper and side sides, and several fourth connecting holes on its lower side; the high-voltage device box has several fifth connecting holes on its left upper and side sides, corresponding to the third connecting holes, and the second connector connects the upper longitudinal beam and the high-voltage device box through the third and fifth connecting holes; the first battery module has several sixth connecting holes on its right lower side, corresponding to the fourth connecting holes, and the third connector connects the upper longitudinal beam and the first battery module through the fourth and sixth connecting holes; the right crossbeam has seventh connecting holes around its perimeter, and the high-voltage... The lower side of the device box has an eighth connection hole that is directly opposite the seventh connection hole, and the upper side of the second battery module has a ninth connection hole that is directly opposite the seventh connection hole. The fourth connector connects the right crossbeam to the high-voltage device box through the seventh and eighth connection holes, and the fifth connector connects the right crossbeam to the second battery module through the seventh and ninth connection holes. The lower side of the lower longitudinal beam has a tenth connection hole, and the left side of the second battery module has an eleventh connection hole that is directly opposite the tenth connection hole. The sixth connector connects the second battery module to the lower longitudinal beam through the tenth and eleventh connection holes.

[0014] Furthermore, the upper longitudinal beam is provided with two first openings.

[0015] The beneficial effects of this technical solution are as follows:

[0016] ① The battery pack fixing beam in this solution serves as the main support, fixing the first battery module, the second battery module, and the high-voltage device box of the battery pack in three areas respectively, separating the high-voltage system of the battery pack from the battery modules, increasing the overall insulation and electrical safety of the battery pack, and effectively reducing the heat transfer of the entire pack.

[0017] ② This technical solution uses a left suspension beam, an upper suspension beam, a right suspension beam, and a lower suspension beam to fix the battery pack to the vehicle as a whole, increasing the mechanical strength and structural stability of the battery pack, while also improving the space utilization of the battery pack in the vehicle.

[0018] ③ This technical solution sets a first opening and a second opening to realize the connection between the first battery module and the second battery module. After the sampling harness of the first battery module and the second battery module passes through the first opening and the second opening, it is connected to the BMS board on the fixed plate, which can shorten the length of the sampling harness and improve the sampling accuracy of the battery pack.

[0019] ④ This technical solution can reduce the overall weight of the battery pack (by setting the first and second openings) while realizing the electrical connection between the battery module and the high-voltage system, thereby improving the overall lightweighting of the battery pack and enhancing its overall strength and space utilization. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the first structure of the battery pack fixing beam of this utility model;

[0021] Figure 2 This is a schematic diagram of the first structure of the battery pack fixing beam of this utility model;

[0022] Figure 3 for Figure 1 The main view;

[0023] Figure 4 for Figure 1 Side view;

[0024] Figure 5 This is a diagram illustrating the installation of the battery pack. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method:

[0026] The reference numerals in the accompanying drawings include: first battery module 1, second battery module 2, high voltage device box 3, BMS board 4, left crossbeam 5, right crossbeam 6, upper longitudinal beam 7, lower longitudinal beam 8, reinforcing rib 9, fixing plate 10, first opening 11, second opening 12, positioning pin 13, third connecting hole 14, fourth connecting hole 15, fifth connecting hole 16, seventh connecting hole 17, eighth connecting hole 18, ninth connecting hole 19, tenth connecting hole 20, eleventh connecting hole 21, upper suspension beam 22, right suspension beam 23, lower suspension beam 24, left suspension beam 25, and suspension through hole 26.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] The basic implementation examples are as follows: Figure 1-5As shown: The battery pack fixing beam includes a left crossbeam 5, a right crossbeam 6, an upper longitudinal beam 7, a lower longitudinal beam 8, reinforcing ribs 9, and a fixing plate 10. The reinforcing ribs 9 consist of several sets of parallel reinforcing plates. The left crossbeam 5 and the upper longitudinal beam 7 are vertically fixed to the upper side of the reinforcing ribs 9, forming an area for installing the first battery module 1. The upper longitudinal beam 7 and the right crossbeam 6 are vertically positioned to form an area for installing a high-voltage device box 3, which contains high-voltage devices. The right crossbeam 6 and the lower longitudinal beam 8 are vertically fixed to the right side of the reinforcing ribs 9, forming an area for installing the second battery module 2. The fixing plate 10 is L-shaped. The left side of the horizontal side of the fixing plate 10 connects to the right side of the upper longitudinal beam 7, and the lower side of the vertical side of the fixing plate 10 connects to the upper side of the right crossbeam 6. The fixing plate 10 is 10-15mm higher than the right crossbeam 6 to prevent contact between the fixing plate 10 and the electrical connection devices of the second battery module 2, thus improving the overall insulation of the battery pack. The upper longitudinal beam 7 has two first openings 11, and the right crossbeam 6 has a second opening 12. The width of the second opening 12 is greater than the width of the fixing plate 10. This separates the high-voltage system of the battery pack from the second battery module 2 while providing wiring space for the input (output) busbar and sampling harness of the first battery module 1. The first battery module 1 is supported by the left crossbeam 5 and fixed to the upper longitudinal beam 7. The high-voltage device box 3 is supported by the right crossbeam 6 and fixed to both the upper longitudinal beam 7 and the right crossbeam 6. The second battery module 2 is fixed to the right crossbeam 6 and the lower longitudinal beam 8. The fixing plate 10 is used to fix the BMS board 4 of the battery pack. The fixing plate 10 has several positioning pins 13, each with a first connecting hole. The BMS board 4 has a second connecting hole opposite to the first connecting hole. The first connector fixes the BMS board 4 to the fixing plate 10 through the first and second connecting holes. The high-voltage device box 3 has an opening on its lower side, which faces the fixing plate 10 and the fixing plate 10 can be located inside the high-voltage device box 3; the first opening 11 is used for the routing of the high-voltage busbar and sampling harness of the first battery module 1, and is connected to the second battery module 2 through the second opening 12.

[0029] The upper longitudinal beam 7 has several third connecting holes 14 on its upper and both sides, and several fourth connecting holes 15 on its lower side. The high-voltage device box 3 has several fifth connecting holes 16 on its left upper and both sides, directly opposite the third connecting holes 14. The second connector connects the upper longitudinal beam 7 and the high-voltage device box 3 through the third connecting holes 14 and the fifth connecting holes 16. The lower right side of the first battery module 1 has several sixth connecting holes, directly opposite the fourth connecting holes 15. The third connector connects the upper longitudinal beam 7 and the first battery module 1 through the fourth connecting holes 15 and the sixth connecting holes. The right crossbeam 6 has a seventh connecting hole 17 around its perimeter. The lower side of the high-voltage device box 3 has an eighth connecting hole 18 directly opposite the seventh connecting hole 17. The upper side of the second battery module 2 has a ninth connecting hole 19 directly opposite the seventh connecting hole 17. The fourth connector connects the right crossbeam 6 to the high-voltage device box 3 through the seventh connecting hole 17 and the eighth connecting hole 18. The fifth connector connects the right crossbeam 6 to the second battery module 2 through the seventh connecting hole 17 and the ninth connecting hole 19. The lower longitudinal beam 8 has a tenth connecting hole 20 on its lower side. The left side of the second battery module 2 has an eleventh connecting hole 21 directly opposite the tenth connecting hole 20. The sixth connector connects the second battery module 2 to the lower longitudinal beam 8 through the tenth connecting hole 20 and the eleventh connecting hole 21.

[0030] An upper suspension beam 22 is provided on the upper side of the upper longitudinal beam 7, a right suspension beam 23 is provided on the right side of the right crossbeam 6, and a lower suspension beam 24 is provided on the lower side of the lower longitudinal beam 8. The upper suspension beam 22, right suspension beam 23, and lower suspension beam 24 are used for suspension and fixation to the vehicle frame. The upper longitudinal beam 7, right crossbeam 6, and lower longitudinal beam 8 are respectively perpendicular to the upper suspension beam 22, right suspension beam 23, and lower suspension beam 24. The thickness of the upper suspension beam 22, right suspension beam 23, and lower suspension beam 24 is three times the thickness of the upper longitudinal beam 7, right crossbeam 6, and lower longitudinal beam 8, respectively. A left suspension beam 25 is provided at the position of the reinforcing rib 9 between the left crossbeam 5 and the lower longitudinal beam 8. The left suspension beam 25 is used for suspension and fixation to the vehicle frame. Suspension through holes 26 are provided in the left suspension beam 25, upper suspension beam 22, right suspension beam 23, and lower suspension beam 24.

[0031] The first, second, third, fourth, fifth, and sixth connectors are made of screws, and each connecting hole is a threaded hole that matches the screw.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A battery pack fixing beam, characterized in that: The system includes a left crossbeam (5), a right crossbeam (6), an upper longitudinal beam (7), a lower longitudinal beam (8), and a fixing plate (10). The left crossbeam (5) and the upper longitudinal beam (7) are vertically fixed to form an area for installing the first battery module (1). The upper longitudinal beam (7) and the right crossbeam (6) are vertically fixed to form an area for installing the high-voltage device box (3). The right crossbeam (6) and the lower longitudinal beam (8) are vertically fixed to form an area for installing the second battery module (2). The fixing plate (10) is L-shaped. The left side of the horizontal side of the fixing plate (10) is connected to the right side of the upper longitudinal beam (7), and the lower side of the vertical side of the fixing plate (10) is connected to the right crossbeam (6). The upper longitudinal beam (7) has a first opening (11), and the right crossbeam (6) has a second opening (12). The width of the hole (12) is greater than the width of the fixing plate (10); the first battery module (1) is supported by the left crossbeam (5) and fixed to the upper longitudinal beam (7); the high voltage device box (3) is supported by the right crossbeam (6) and fixed to the upper longitudinal beam (7) and the right crossbeam (6); the second battery module (2) is fixed to the right crossbeam (6) and the lower longitudinal beam (8); the fixing plate (10) is used to fix the BMS board (4) of the battery pack; the lower side of the high voltage device box (3) is provided with an opening, the opening is directly opposite the fixing plate (10) and the fixing plate (10) can be located inside the high voltage device box (3); the first opening (11) is used for the routing of the high voltage busbar and sampling harness of the first battery module (1), and is connected to the second battery module (2) through the second opening (12).

2. The battery pack fixing beam according to claim 1, characterized in that: The upper longitudinal beam (7) is provided with an upper suspension beam (22) on its upper side, the right cross beam (6) is provided with a right suspension beam (23) on its right side, and the lower longitudinal beam (8) is provided with a lower suspension beam (24) on its lower side. The upper suspension beam (22), the right suspension beam (23) and the lower suspension beam (24) are respectively used for suspension and fixing with the vehicle frame. The upper suspension beam (22), the right suspension beam (23) and the lower suspension beam (24) are provided with suspension through holes (26).

3. The battery pack fixing beam according to claim 2, characterized in that: The upper longitudinal beam (7), the right transverse beam (6), and the lower longitudinal beam (8) are respectively perpendicular to the upper suspension beam (22), the right suspension beam (23), and the lower suspension beam (24).

4. The battery pack fixing beam according to claim 2, characterized in that: The thicknesses of the upper suspension beam (22), right suspension beam (23), and lower suspension beam (24) are three times the thicknesses of the upper longitudinal beam (7), right transverse beam (6), and lower longitudinal beam (8), respectively.

5. The battery pack fixing beam according to claim 1, characterized in that: The fixing plate (10) is 10-15mm higher than the right crossbeam (6).

6. The battery pack fixing beam according to claim 1, characterized in that: The left crossbeam (5), upper longitudinal beam (7), right crossbeam (6) and lower longitudinal beam (8) are connected by reinforcing ribs (9).

7. The battery pack fixing beam according to claim 6, characterized in that: A left suspension beam (25) is provided at the position of the reinforcing rib (9) between the left crossbeam (5) and the lower longitudinal beam (8). The left suspension beam (25) is used to fix the suspension to the vehicle frame. A suspension through hole (26) is provided in the left suspension beam (25).

8. The battery pack fixing beam according to claim 1, characterized in that: The fixing plate (10) is provided with a plurality of positioning pins (13), the positioning pins (13) are provided with a first connecting hole, the BMS plate (4) is provided with a second connecting hole opposite to the first connecting hole, and the first connector fixes the BMS plate (4) on the fixing plate (10) through the first connecting hole and the second connecting hole.

9. The battery pack fixing beam according to claim 1, characterized in that: The upper longitudinal beam (7) has several third connecting holes (14) on its upper and both sides, and several fourth connecting holes (15) on its lower side; the high-voltage device box (3) has several fifth connecting holes (16) on its upper and both sides on its left side, which are directly opposite to the third connecting holes (14), and the second connector connects the upper longitudinal beam (7) and the high-voltage device box (3) through the third connecting holes (14) and the fifth connecting holes (16); the lower side of the right side of the first battery module (1) has several sixth connecting holes, which are directly opposite to the fourth connecting holes (15), and the third connector connects the upper longitudinal beam (7) and the first battery module (1) through the fourth connecting holes (15) and the sixth connecting holes; the right crossbeam (6) has a seventh connecting hole (17) around its perimeter, and the lower side of the high-voltage device box (3) has a seventh connecting hole (17) around its perimeter. The seventh connecting hole (17) is directly opposite the eighth connecting hole (18). The upper side of the second battery module (2) is provided with a ninth connecting hole (19) directly opposite the seventh connecting hole (17). The fourth connector connects the right crossbeam (6) to the high-voltage device box (3) through the seventh connecting hole (17) and the eighth connecting hole (18). The fifth connector connects the right crossbeam (6) to the second battery module (2) through the seventh connecting hole (17) and the ninth connecting hole (19). The lower longitudinal beam (8) is provided with a tenth connecting hole (20). The left side of the second battery module (2) is provided with an eleventh connecting hole (21) directly opposite the tenth connecting hole (20). The sixth connector connects the second battery module (2) and the lower longitudinal beam (8) through the tenth connecting hole (20) and the eleventh connecting hole (21).

10. The battery pack fixing beam according to claim 1, characterized in that: The upper longitudinal beam (7) is provided with two first openings (11).

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