Vehicle-mounted battery system and electric vehicle

Abstract

The invention discloses a vehicle-mounted battery system and an electric vehicle. The vehicle-mounted battery system comprises a bottom support, a plurality of battery packs and a supporting row, the bottom support is used for being connected with a frame of the electric car. The plurality of battery packs are arranged on the bottom support along the thickness direction of the battery packs; the supporting rows are arranged between the adjacent battery packs and extend in the direction perpendicular to the bottom support. On one hand, the supporting row is located between the adjacent battery packs, the battery packs can be effectively supported and fixed, it is ensured that the battery packs are stably and reliably installed on the bottom support in the vehicle running process, mutual extrusion or relative displacement between the battery packs is avoided, and the overall stability and safety of the vehicle-mounted battery system are improved; and on the other hand, the supporting row is arranged in the battery pack in a hidden mode, so that the situation that the supporting pieces are exposed is avoided from the appearance, the overall appearance of the vehicle-mounted battery system is more compact and attractive, the visual effect is improved, and the requirement of a user for the attractiveness of the vehicle appearance design is met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted battery systems, and in particular to a vehicle-mounted battery system and an electric vehicle. Background Art

[0002] With the rapid development of new energy vehicles, the on-board battery system, as the key power source of electric vehicles, has a significant impact on the safety, reliability and aesthetic appearance of the vehicle due to the rationality of its structural design. In the prior art, an on-board battery system usually includes a base and multiple battery packs. The base is used to connect to the vehicle chassis or frame, and multiple battery packs are installed on the base to form a power system. However, in actual application, due to various vibrations and impacts generated during vehicle driving, if there is a lack of effective support structure between the battery packs, problems such as mutual squeezing and relative displacement are likely to occur, resulting in the battery packs being loosely fixed, affecting the overall stability and safety of the system.

[0003] To address these issues, existing technologies typically employ support members or partitions between battery packs to support and secure them. However, most existing support structures are exposed, increasing the volume of the onboard battery system and impacting its compactness. This also exposes the support members, affecting the overall appearance of the battery system and the vehicle, making it difficult to meet user aesthetic demands. Furthermore, exposed structural components can be affected by the external environment over long periods of use, posing reliability risks.

[0004] Therefore, how to ensure the structural stability of the vehicle battery system while taking into account its aesthetic appearance has become a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] To achieve the above-mentioned purpose, the present invention provides a solution: an on-board battery system, which includes a base, multiple battery packs and a support row; the base is used to connect to the frame of the electric vehicle; multiple battery packs are arranged on the base along the thickness direction of the battery packs; the support row is arranged between adjacent battery packs, and the support row extends in a direction perpendicular to the base.

[0006] Optionally, the support row includes multiple cross beams and multiple longitudinal beams, the multiple cross beams are arranged at intervals, and the multiple longitudinal beams are arranged at intervals, the opposite ends of the longitudinal beams are respectively connected to the cross beams, one of the cross beams is connected to the bottom support, the cross beams and the longitudinal beams are located between adjacent battery packs, the battery packs are connected to the longitudinal beams, and the longitudinal beams extend in a direction perpendicular to the bottom support.

[0007] Optionally, the support row further includes a plurality of reinforcing beams, the opposite ends of the reinforcing beams are respectively connected to adjacent transverse beams and longitudinal beams, and the extension directions of the reinforcing beams are respectively arranged at angles to the extension directions of the transverse beams and the longitudinal beams.

[0008] Optionally, the vehicle-mounted battery system includes fasteners, which are located in the battery pack and are respectively connected to the battery pack and the longitudinal beam. A notch for exposing the fastener is opened at a position of the battery pack corresponding to the fastener.

[0009] Optionally, the support row includes a thermal insulation pad, which is arranged in a frame formed by the cross beam and the longitudinal beam, and the thermal insulation pad is located between adjacent battery packs.

[0010] Optionally, the vehicle-mounted battery system includes a reinforcing support, which is connected to the base and extends in a direction perpendicular to the base to connect with the support row.

[0011] Optionally, the reinforced support includes multiple first support beams, multiple second support beams and multiple third support beams, the multiple first support beams are arranged at intervals, the multiple second support beams are arranged at intervals, the opposite ends of the first support beams are respectively connected to the second support beams, one of the first support beams is connected to the bottom support, the second support beam is connected to the support row, the opposite ends of the third support beam are respectively connected to the first support beam and the second support beam, and the extension direction of the third support beam is set at an angle to the extension direction of the cross beam and the extension direction of the longitudinal beam.

[0012] Optionally, the battery pack includes a box body, multiple single cells and a control system. The box body is formed with a accommodating cavity, and the box body is connected to the base. The multiple single cells are gradually arranged in the accommodating cavity from one end of the box body close to the base to the other end to form a battery pack. The control system is located at the end of the battery pack away from the base, and the control system and the battery pack are electrically connected.

[0013] Optionally, the thickness of the box is D, the height of the box is H, and 4≤H / D≤8.

[0014] The present invention also includes an electric vehicle, a vehicle frame and an on-board battery system as described above, wherein the on-board battery system is arranged on the vehicle frame.

[0015] The beneficial effects of the present invention are as follows: by arranging a support row between a plurality of battery packs arranged on the base along the thickness direction, the support row extends in a direction perpendicular to the base and is hidden in the battery pack. On the one hand, the support row is located between adjacent battery packs, which can effectively support and fix the battery packs, ensuring that the battery packs are stably and reliably installed on the base during vehicle operation, avoiding mutual squeezing or relative displacement between battery packs, and improving the overall stability and safety of the vehicle battery system; on the other hand, since the support row is arranged inside the battery pack in a hidden manner, the support members are avoided from being exposed in appearance, making the overall appearance of the vehicle battery system more compact and beautiful, improving the visual effect, and meeting the user's aesthetic requirements for the vehicle's exterior design. Therefore, the vehicle battery system of this embodiment not only effectively solves the stability problem of battery pack installation through the hidden support row structure, but also improves the overall appearance effect, achieving a simultaneous improvement in the structural stability and aesthetics of the vehicle battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0017] Figure 1 is a schematic structural diagram of a tram provided by an embodiment of the present invention;

[0018] Figure 2 is a structural diagram of a vehicle-mounted battery system provided by an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the internal structure of the vehicle-mounted battery system provided by an embodiment of the present invention;

[0020] Figure 4 The embodiment of the present invention provides Figure 2 A partial enlarged schematic diagram of area A in the middle;

[0021] Figure 5 It is a schematic diagram of the exploded structure of the battery pack provided by an embodiment of the present invention.

[0022] Description of Figure Numbers:

[0023] On-vehicle battery system 100, base 10, battery pack 20, notch 201, box 21;

[0024] Single battery 22, control system 23, support row 30, cross beam 31, longitudinal beam 32, reinforcement beam 33; fastener 40, thermal insulation pad 50, reinforcement support 60, first support beam 61, second support beam 62; third support beam 63, frame 200. DETAILED DESCRIPTION

[0025] The following will describe in detail the embodiments of the present invention in conjunction with the accompanying drawings, clearly and comprehensively demonstrating the technical solutions. It should be noted that the embodiments listed are only part of the present invention, not all possible implementation methods. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1 and Figure 2 As shown, Figure 1 is a structural diagram of a tram provided by an embodiment of the present invention, Figure 2 1 is a schematic structural diagram of a vehicle-mounted battery system 100 provided in an embodiment of the present invention.

[0027] The technical field involved in this invention is the design and construction of an electric vehicle, specifically an electric vehicle equipped with an advanced onboard battery system 100. This electric vehicle is designed to provide an efficient and environmentally friendly means of transportation. It consists of two core components: a frame 200 and an onboard battery system 100. The frame 200, as the electric vehicle's underlying structure, plays the crucial role of supporting the vehicle's weight and connecting its various components. The onboard battery system 100, meticulously designed and mounted on the frame 200, ensures the electric vehicle's power source, enabling it to be electrically driven, thereby reducing reliance on traditional fossil fuels and minimizing environmental pollution.

[0028] This type of tram is not only suitable for daily personal travel, but also for commercial transportation. It can be designed into different types of vehicles, including but not limited to cars, trucks, heavy vehicles, etc. Each type of tram can be customized according to its specific purpose to meet the needs of different users.

[0029] The onboard battery system 100 includes a base 10, multiple battery packs 20, and support rows 30. The base 10's primary function is to connect to the vehicle's frame 200, ensuring the battery system is securely mounted on the vehicle structure. The multiple battery packs 20 are neatly arranged along their thickness on the base 10. This design not only effectively improves space utilization but also contributes to the compactness and integration of the battery system structure, making the layout of the vehicle chassis more convenient and efficient.

[0030] The vehicle-mounted battery system 100 provided in this embodiment comprises a plurality of support rows 30 arranged between battery packs 20 arranged along the thickness direction on the base 10. The support rows 30 extend perpendicular to the base 10 and are concealed within the battery packs 20. On the one hand, the support rows 30, located between adjacent battery packs 20, can effectively support and secure the battery packs 20, ensuring that the battery packs 20 are stably and reliably mounted on the base 10 during vehicle operation, preventing mutual compression or relative displacement between the battery packs 20, and improving the overall stability and safety of the vehicle-mounted battery system 100. On the other hand, since the support rows 30 are concealed within the battery packs 20, the exposed support members are avoided from the exterior, making the overall appearance of the vehicle-mounted battery system 100 more compact and beautiful, improving the visual effect, and meeting the user's aesthetic requirements for vehicle exterior design. Therefore, the vehicle-mounted battery system 100 of this embodiment, through the concealed support row 30 structure, not only effectively solves the problem of battery pack 20 installation stability, but also improves the overall appearance, achieving a simultaneous improvement in the structural stability and aesthetics of the vehicle-mounted battery system 100.

[0031] See also Figures 1 to 3 As shown, Figure 3 Schematic diagram of the internal structure of the vehicle battery system 100 provided in an embodiment of the present invention.

[0032] The support row 30 specifically includes multiple cross beams 31 and multiple longitudinal beams 32. The multiple cross beams 31 and multiple longitudinal beams 32 are arranged at intervals, and the opposite ends of the longitudinal beams 32 are respectively connected to the cross beams 31 to form a stable frame structure. One of the cross beams 31 is connected to the base 10, and the longitudinal beam 32 extends in a direction perpendicular to the base 10 and is connected to the battery pack 20, so that the cross beams 31 and the longitudinal beams 32 are both arranged between adjacent battery packs 20.

[0033] In the above structural design, the longitudinal beams 32 extend perpendicular to the base bracket 10, effectively supporting and stabilizing the battery packs 20 and preventing them from shifting or tilting during vibration or vehicle operation. Furthermore, the connection between the cross beams 31 and the base bracket 10 further enhances the rigidity and strength of the overall structure, ensuring the stability of the connection between the support rows 30 and the base bracket 10, thereby improving the structural stability and safety of the entire on-board battery system 100. Furthermore, the frame structure formed by the cross beams 31 and longitudinal beams 32 is located between adjacent battery packs 20. While providing stable support, it also effectively utilizes the space between the battery packs 20, making the entire battery system structure more compact and the overall layout more rational.

[0034] Therefore, this embodiment forms a stable frame structure through the coordinated connection of the cross beam 31 and the longitudinal beam 32, which solves the problem of easy displacement and loose connection of the battery pack 20 in the traditional vehicle-mounted battery system 100, significantly improves the stability and reliability of the installation of the battery pack 20, and thus realizes the optimization of the overall structure of the vehicle-mounted battery system 100 and the improvement of safety performance.

[0035] The support row 30 includes a thermal insulation pad 50 . The thermal insulation pad 50 is disposed in a frame formed by the cross beam 31 and the longitudinal beam 32 . The thermal insulation pad 50 is located between adjacent battery packs 20 .

[0036] In this embodiment, by providing a thermal insulation pad 50 in the support row 30, the thermal insulation pad 50 is arranged in the frame formed by the crossbeam 31 and the longitudinal beam 32, and is located between adjacent battery packs 20, so that the heat transfer between adjacent battery packs 20 can be effectively blocked. Specifically, once a battery cell in the battery pack 20 generates abnormal heat or has a local high temperature, the thermal insulation pad 50 can quickly intervene, effectively isolate and block the transfer of heat to the adjacent battery pack 20, thereby avoiding heat diffusion and significantly reducing the risk of thermal runaway of the battery system. In addition, the clever layout of the thermal insulation pad 50 also makes full use of the structural space enclosed by the crossbeam 31 and the longitudinal beam 32, making the overall structure more compact and reasonable, without the need to occupy additional installation space. This design not only improves the safety of the battery system, but also significantly improves the space utilization efficiency. Therefore, this embodiment effectively solves the problem of easy heat conduction and diffusion between adjacent battery packs 20 in the traditional vehicle battery system 100 by arranging a thermal insulation pad 50 in the frame surrounded by the cross beam 31 and the longitudinal beam 32, thereby achieving a significant improvement in the overall thermal management performance of the battery system and ensuring the safety and reliability of the operation of the vehicle battery system 100.

[0037] The support row 30 also includes a plurality of reinforcing beams 33 , the opposite ends of which are respectively connected to the adjacent transverse beams 31 and longitudinal beams 32 , and the extension directions of the reinforcing beams 33 are respectively arranged at an angle to the extension directions of the transverse beams 31 and the longitudinal beams 32 .

[0038] In this embodiment, a plurality of reinforcing beams 33 are added to the support row 30, and the opposite ends of the reinforcing beams 33 are respectively connected to the adjacent crossbeams 31 and longitudinal beams 32, and the extension direction of the reinforcing beams 33 is respectively set at an angle to the extension direction of the crossbeams 31 and the extension direction of the longitudinal beams 32, so that a strong triangular support structure is formed between the crossbeams 31 and the longitudinal beams 32, thereby further strengthening the structural strength and rigidity of the entire support row 30. Specifically, the provision of the reinforcing beams 33 effectively enhances the supporting force of the crossbeams 31 and the longitudinal beams 32, reduces the risk of structural loosening caused by deformation or vibration due to force, and significantly improves the stability and reliability of the support row 30 itself. The structural design of this embodiment effectively solves the problem of weak connection strength and easy deformation between the crossbeams 31 and the longitudinal beams 32 in the traditional support structure, avoids the displacement and shaking of the battery pack 20 due to vibration or impact during vehicle driving, ensures the safety and stability of the battery system operation, and thus achieves a significant improvement in the overall structural strength and safety performance of the on-board battery system 100.

[0039] The vehicle battery system 100 includes a reinforcing bracket 60, which is connected to the base 10 and extends perpendicularly to the base 10 to connect to the support row 30. The reinforcing bracket is located on both sides of the battery pack 20 in the width direction and, together with the support row 30, provides support for the battery pack 20.

[0040] In this embodiment, by providing a reinforcing support 60 in the vehicle-mounted battery system 100, the reinforcing support 60 is connected to the base 10 and extends in a direction perpendicular to the base 10 and is connected to the support row 30, so that the reinforcing support 60 can work together with the support row 30 to form an effective support for the battery pack 20. Specifically, the reinforcing support 60 is cleverly arranged on both sides of the battery pack 20 in the width direction and closely cooperates with the support row 30 to jointly share the various loads generated by the battery pack 20 during operation. This structural design significantly improves the support strength of the battery pack 20 in the width direction and optimizes the force distribution, thereby effectively preventing the risk of deformation or damage to the battery pack 20 due to external forces such as vibration and impact during vehicle operation.

[0041] This embodiment solves the problem in the prior art of insufficient support in the width direction of the battery pack 20, which is prone to shaking or deformation, by strengthening the coordination between the support 60 and the support row 30, thereby improving the overall stability and safety of the installation structure of the battery pack 20, ensuring the reliability and service life of the battery system during actual operation, and ultimately achieving a significant improvement in the structural strength, stability and safety performance of the vehicle-mounted battery system 100.

[0042] The reinforcing support 60 includes multiple first support beams 61, multiple second support beams 62 and multiple third support beams 63. The multiple first support beams 61 are arranged at intervals, and the multiple second support beams 62 are arranged at intervals. The opposite ends of the first support beams 61 are respectively connected to the second support beams 62. One of the first support beams 61 is connected to the base 10, and the second support beams 62 are connected to the support row 30. The opposite ends of the third support beam 63 are respectively connected to the first support beam 61 and the second support beam 62. The extension direction of the third support beam 63 is set at an angle to the extension direction of the cross beam 31 and the extension direction of the longitudinal beam 32.

[0043] In this embodiment, through the above-described structural design, the third support beam 63 provides oblique support within the reinforcement support 60, firmly connecting the first support beam 61 and the second support beam 62 together, effectively forming a stable triangular support structure, and significantly enhancing the overall structural rigidity of the reinforcement support 60. This structural design effectively solves the problem of insufficient rigidity and susceptibility to deformation or damage of the reinforcement support 60 in the prior art, improves the vibration and impact resistance of the reinforcement support 60 itself, and further enhances the connection stability between the base 10 and the support row 30, effectively preventing the risk of displacement, shaking, or structural damage to the battery pack 20 due to vibration or impact during vehicle operation.

[0044] To sum up, this embodiment significantly improves the structural strength and stability of the reinforced support 60 by rationally configuring the structural layout of the first, second and third support beams 63, thereby effectively improving the overall structural strength, operational stability and safety performance of the vehicle battery system 100.

[0045] See also Figures 1 to 4 As shown, Figure 4 The embodiment of the present invention provides Figure 2 A partial enlarged schematic diagram of area A in the middle.

[0046] The vehicle battery system 100 includes a fastener 40 located within the battery pack 20 and connected to the battery pack 20 and the longitudinal beam 32, respectively. A notch 201 is provided on the battery pack 20 at the location corresponding to the fastener 40, exposing the fastener 40. The fastener 40 connects the battery pack 20 to the support row 30, and the notch 201 allows a worker to lock the fastener 40 with a tool. The fastener 40 may be a screw, rivet, or the like.

[0047] In this embodiment, fasteners 40 are provided in the vehicle battery system 100. Fasteners 40 are located within the battery pack 20 and connected to the battery pack 20 and the longitudinal beams 32, respectively, to achieve a secure connection between the battery pack 20 and the support row 30. Furthermore, notches 201 are provided on the battery pack 20 at locations corresponding to the fasteners 40, exposing the fasteners 40 and enabling workers to more easily lock or remove the fasteners 40 using tools such as screws or rivets.

[0048] The structural design of the above-mentioned technical solution effectively solves the problem of inconvenient installation and removal of the battery pack 20 in the prior art. By exposing the fastener 40 through the notch 201, the operator can quickly lock or remove the fastener 40 without complicated disassembly or adjustment, thereby simplifying the installation and maintenance process of the battery pack 20 and significantly improving assembly efficiency and maintenance convenience. In addition, the use of fasteners 40 to form a stable connection between the battery pack 20 and the longitudinal beam 32 further enhances the reliability of the connection between the battery pack 20 and the supporting structure, avoiding displacement or loosening of the battery pack 20 due to vibration or impact during vehicle operation, thereby improving the overall structural stability and safety of the battery system.

[0049] In summary, this embodiment improves the assembly and maintenance convenience of the battery pack 20 by providing the notch 201 structure of the exposed fastener 40, and at the same time utilizes the reliable connection characteristics of the fastener 40 to effectively improve the structural stability and safety performance of the vehicle battery system 100 during operation.

[0050] See also Figure 1 and Figure 5 As shown, Figure 5 Schematic diagram of the exploded structure of the battery pack 20 provided in an embodiment of the present invention.

[0051] The battery pack 20 includes a case 21, multiple single cells 22 and a control system 23. The case 21 forms a accommodating cavity, and the case 21 is connected to the base 10. The multiple single cells 22 are gradually arranged in the accommodating cavity from one end of the case 21 close to the base 10 to the other end to form a battery pack. The control system 23 is located at the end of the battery pack away from the base, and the control system 23 is electrically connected to the battery pack.

[0052] The technical solution of this embodiment achieves the following technical effects by gradually arranging multiple single cells 22 in the accommodating cavity from one end of the box 21 close to the base 10 to the other end, and setting the control system 23 at the end of the battery pack away from the base: First, through the above-mentioned structural design, the heavier single cells 22 are concentrated in the box 21 close to the base 10, while the relatively lighter control system 23 is arranged at a position away from the base 10. As a result, the battery pack 20 as a whole forms a "light on top and heavy on the bottom" structural feature, which significantly lowers the center of gravity of the battery pack 20. A lower center of gravity helps to improve the stability of the battery pack 20 in applications such as vehicles, reduces the risk of the vehicle rolling over when driving at high speeds, turning, or encountering bumpy roads, and thus significantly improves the safety performance of the entire vehicle.

[0053] Secondly, the stepped arrangement of the cells 22 ensures a compact battery pack and facilitates heat dissipation, extending the battery life and facilitating subsequent maintenance and replacement. Furthermore, the electrical connection between the control system 23 and the battery pack ensures real-time monitoring and effective management of the battery status, improving the operational reliability of the battery pack 20.

[0054] Therefore, this technical solution effectively solves technical problems such as the high center of gravity and unreasonable structural distribution of the existing battery pack 20 through a reasonable structural layout, and effectively lowers the center of gravity of the battery pack 20, significantly improves the structural stability, and comprehensively enhances the safety performance.

[0055] Furthermore, the thickness of the box body 21 is D, the height of the box body 21 is H, and 4≤H / D≤8.

[0056] In this embodiment, the thickness D and height H of the box body 21 are limited so that 4≤H / D≤8, for example, 4, 5, 6, 7, 8, etc. Specifically, by precisely controlling the ratio of the height to the thickness of the box body 21, a flat structure of the battery pack 20 is successfully formed.

[0057] This technical solution effectively solves the problems of the existing battery pack 20 structure being too high, too thin, or having an unreasonable height-to-thickness ratio, which results in an increased center of gravity of the battery pack 20, reduced stability, and difficulty in efficiently supporting the support structure. Specifically, the flattened design of the battery pack 20 allows it to fit more closely with the bottom support rows 30 when installed on vehicles and other equipment, achieving a better fit. As the height of the battery pack 20 decreases and the thickness appropriately increases, the spacing between adjacent support rows 30 is reduced, allowing the battery pack 20 to obtain effective support from more support rows 30, thereby significantly improving the load-bearing capacity and structural stability of the battery pack 20 in the direction of force.

[0058] In addition, since the contact area between the flat battery pack 20 and the bottom support row 30 is increased, when the battery pack 20 is subjected to impact or vibration, the multiple support rows 30 can disperse and absorb external forces, further improving the shock resistance and reliability of the battery pack 20.

[0059] To sum up, this technical solution cleverly adjusts the ratio of the height and thickness of the box 21, successfully realizes the flat design of the battery pack 20, and effectively solves the technical problems of the existing battery pack 20's lack of support and insufficient structural stability, thereby ensuring that the battery pack 20 obtains solid support, a more stable structure, and more reliable use.

[0060] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0061] It should also be noted that when an element is referred to as being "attached to" or "disposed on" another element, it can be directly attached to the other element or there may be an intervening element. The term "connected" can mean a direct connection between the elements or an indirect connection via another intervening element.

[0062] In addition, the descriptions of "first" and "second" in the present invention are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vehicle-mounted battery system, characterized in that: The vehicle-mounted battery system includes: The bottom bracket is used to connect with the frame of the tram; A plurality of battery packs are arranged on the base along the thickness direction of the battery packs; and The support row is arranged between adjacent battery packs, and the support row extends in a direction perpendicular to the base.

2. The vehicle-mounted battery system according to claim 1, characterized in that: The support row includes multiple cross beams and multiple longitudinal beams, multiple cross beams are arranged at intervals, and multiple longitudinal beams are arranged at intervals. The opposite ends of the longitudinal beams are respectively connected to the cross beams, one of the cross beams is connected to the bottom bracket, and the cross beams and the longitudinal beams are located between adjacent battery packs. The battery packs are connected to the longitudinal beams, and the longitudinal beams extend in a direction perpendicular to the bottom bracket.

3. The vehicle-mounted battery system according to claim 2, characterized in that: The support row also includes a plurality of reinforcing beams, the opposite ends of which are respectively connected to the adjacent transverse beams and longitudinal beams, and the extension directions of the reinforcing beams are respectively arranged at angles to the extension directions of the transverse beams and the longitudinal beams.

4. The vehicle-mounted battery system according to claim 2, characterized in that: The vehicle-mounted battery system includes a fastener, which is located in the battery pack and connected to the battery pack and the longitudinal beam respectively. A notch for exposing the fastener is opened at a position of the battery pack corresponding to the fastener.

5. The vehicle-mounted battery system according to claim 2, characterized in that: The support row includes a thermal insulation pad, which is arranged in a frame formed by the cross beam and the longitudinal beam, and the thermal insulation pad is located between adjacent battery packs.

6. The vehicle-mounted battery system according to any one of claims 1 to 5, characterized in that: The vehicle-mounted battery system includes a reinforcing support, which is connected to the base and extends in a direction perpendicular to the base to connect with the support row.

7. The vehicle-mounted battery system according to claim 6, characterized in that: The reinforced support includes multiple first support beams, multiple second support beams and multiple third support beams. The multiple first support beams are arranged at intervals, and the multiple second support beams are arranged at intervals. The opposite ends of the first support beams are respectively connected to the second support beams, one of the first support beams is connected to the base, and the second support beams are connected to the support row. The opposite ends of the third support beam are respectively connected to the first support beam and the second support beam, and the extension direction of the third support beam is set at an angle to the extension direction of the cross beam and the extension direction of the longitudinal beam.

8. The vehicle-mounted battery system according to any one of claims 1 to 5, characterized in that: The battery pack includes a box body, multiple single cells and a control system. The box body is formed with a accommodating cavity. The box body is connected to the base. The multiple single cells are gradually arranged in the accommodating cavity from one end of the box body close to the base to the other end to form a battery pack. The control system is located at the end of the battery pack away from the base. The control system and the battery pack are electrically connected.

9. The vehicle-mounted battery system according to claim 8, characterized in that: The thickness of the box is D, the height of the box is H, and 4≤H / D≤8.

10. A tram, characterized in that: The electric vehicle comprises a vehicle frame and the on-board battery system according to any one of claims 1 to 9, wherein the on-board battery system is arranged on the vehicle frame.

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