Battery pack assembly and electric vehicle comprising the same

Abstract

The application provides a battery pack assembly and an electric commercial vehicle comprising the same, the battery pack assembly comprising a battery pack frame and a plurality of battery modules, the battery pack frame being provided with a plurality of battery compartments for accommodating the battery modules, each of the battery compartments being provided with an opening, and the opening being used for the battery module to independently enter or move out of the battery compartment. The battery pack assembly and the electric commercial vehicle comprising the same install the battery pack in the plurality of battery compartments respectively, so that the overall structure of the battery pack assembly is reasonably arranged and the disassembly and assembly of the plurality of battery modules can be independently completed.

Description

[0001] This application claims priority to Chinese Patent Application No. CN2021116067637, filed on December 26, 2021, Chinese Patent Application No. CN2021116067815, filed on December 26, 2021, and Chinese Patent Application No. CN2021114443838, filed on November 30, 2021. This application incorporates the entire text of the above-mentioned Chinese patent applications. TECHNICAL FIELD

[0002] The present application relates to a battery pack assembly and an electric vehicle comprising the same. BACKGROUND

[0003] In recent years, new energy vehicles have developed rapidly. Electric vehicles relying on storage batteries as driving energy have the advantages of zero emissions and low noise. With the increasing market share and usage frequency of electric vehicles, electric commercial vehicles, such as electric heavy trucks and electric light trucks, have begun to be widely used. Battery replacement technology has also been gradually applied to the field of commercial vehicles.

[0004] Current commercial vehicle heavy truck series battery replacement modes mostly use top hoisting and side grabbing. Top hoisting requires a hoisting structure, and the overall building of the battery replacement station is relatively high, occupying a large area, with high maintenance costs and poor safety. The structure of side grabbing is complex. Moreover, the center of gravity of the battery pack is high in top hoisting and side grabbing, which may cause the risk of overturning during emergency braking.

[0005] Currently, the batteries in the existing battery pack are assembled together. In order to maintain the lower layer of batteries, it is necessary to completely remove each layer of batteries above it, which is poor in maintainability. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the defects of the prior art battery pack, such as high center of gravity, low battery replacement efficiency, and poor maintainability of the battery pack. The present application provides a battery pack assembly and an electric vehicle comprising the same.

[0007] The present application solves the above technical problems by the following technical solutions:

[0008] A battery pack assembly comprises a battery pack frame and a plurality of battery modules. The battery pack frame is provided with a plurality of battery compartments for accommodating the battery modules. Each battery compartment is provided with an opening for the battery modules to independently enter or move out of the battery compartment.

[0009] In the present application, the battery pack is installed in each battery compartment, so that the overall structure of the battery pack assembly is reasonably arranged, the disassembly and assembly of the plurality of battery modules can be independently completed, the assembly type is high, and the maintainability is high. It is convenient for the individual maintenance of each battery module and the simultaneous maintenance of a plurality of battery modules.

[0010] Preferably, the battery pack frame is provided with multiple layers of platforms, each layer of platform is provided with a plurality of battery compartments.

[0011] In the present application, by the above structure, multiple layers of platforms are provided to accommodate battery modules, thereby improving the space utilization.

[0012] Preferably, the multiple layers of platforms include at least a bottom layer of platform and a top layer of platform, the battery compartments on the bottom layer of platform are provided with lateral openings, and the battery compartments on the top layer of platform are provided with top openings.

[0013] In the present application, by the above structure, each battery compartment on each platform is convenient for placing or taking out a battery module without interference.

[0014] Preferably, partitions are provided between the battery compartments, and the partitions are used to separate the battery modules.

[0015] In the present application, by the above structure, the battery modules are prevented from colliding with each other.

[0016] Preferably, the middle part of the battery pack frame has a hollow area, and the battery compartments are symmetrically distributed on both sides of the hollow area.

[0017] Preferably, the hollow area includes an avoidance space penetrating through the battery pack frame, and the avoidance space cooperates with a chassis beam of a vehicle.

[0018] In the present application, by the above structure, the space is reasonably arranged, which is more conducive to installing the battery pack assembly on the chassis of the vehicle.

[0019] Preferably, the battery pack assembly further includes a general electrical connector electrically connected with the vehicle, the general electrical connector is installed at the front end of the battery pack frame, and the general electrical connector is connected with the battery modules through an electrical circuit.

[0020] In the present application, by the above structure, the electrical connector is separately provided as an electrical connector of the battery pack assembly as a whole, which is convenient for disassembly and assembly.

[0021] Preferably, the general electrical connector includes a first electrical connector and a second electrical connector, and the first electrical connector and the second electrical connector are respectively connected to the parts of the battery pack assembly located on the left and right sides of the chassis beam of the vehicle.

[0022] In the present application, by the above structure, the electrical circuit layout is more convenient for installation and connection.

[0023] Preferably, each battery module is provided with an electrical connector, and the electrical connector is used to connect the electrical circuit and the battery module.

[0024] In the present application, the battery module can be electrically connected with the circuit through the above structure.

[0025] Preferably, the circuit comprises a first circuit and a second circuit, the battery modules on one side of the battery pack assembly are connected in series through the first circuit, the battery modules on the other side of the battery pack assembly are connected in series through the second circuit, and the first circuit and the second circuit are connected to the first electrical connector and the second electrical connector respectively.

[0026] In the present application, through the above structure, the first electrical connector and the second electrical connector can connect multiple battery modules in advance, and during the installation of the battery pack assembly to the electric vehicle, the vehicle end connector directly interfaces with the multiple battery modules through the first electrical connector and the second electrical connector, reducing the electrical connection interface of the electric vehicle and the battery pack assembly, improving the assembly efficiency and success rate of the two. The multiple battery modules on both sides of the battery pack assembly are connected in series, facilitating the unified management of the multiple battery modules, reducing the output interface, and connecting the battery modules connected in series on both sides of the battery pack assembly to the first electrical connector and the second electrical connector, realizing the parallel connection of the battery modules on both sides of the battery pack assembly, which can improve the vehicle's range.

[0027] Preferably, the circuit is at least partially arranged in the hollow area.

[0028] In the present application, through the above structure, the space utilization is improved.

[0029] Preferably, the battery pack frame is further provided with a plurality of through holes for the circuit to pass through.

[0030] In the present application, through the above structure, the connection hole for the circuit part to pass through is opened, facilitating the arrangement of the circuit part.

[0031] Preferably, the middle part of the battery pack frame has a locking member, and the battery pack assembly is detachably installed on the chassis main beam of the vehicle through the locking member.

[0032] In the present application, through the above structure, the structure layout is reasonable, and the connection between the battery pack assembly and the vehicle chassis is more firm.

[0033] Preferably, the locking member is a lock shaft, and the lock shaft is arranged outside the side wall of the battery compartment close to the hollow area.

[0034] In the present application, through the above structure, the lock shaft is arranged on the side wall close to the chassis main beam, which can be better locked to the chassis main beam, and is beneficial to the stability of the structure.

[0035] Preferably, the lock shaft is mounted on the side wall of the battery compartment through a support, and the lock shaft extends from the surface of the support to the middle part of the battery pack assembly.

[0036] In the present application, the above structure is simple and convenient to install.

[0037] Preferably, the locking member comprises a threaded part or a stop part.

[0038] In the present application, the above structure diversifies the mounting connection form of the lock connection structure, and the hanging member and the longitudinal beam are only locked in the vertical direction, and the connection is more stable.

[0039] Preferably, the middle part of the battery pack frame is further provided with a positioning part for positioning the battery pack assembly, and the positioning part abuts against the chassis beam of the vehicle.

[0040] In the present application, the positioning part abutting against the chassis of the vehicle is used to position the battery pack assembly during installation, so that the installation of the battery pack assembly can be quickly and accurately realized.

[0041] Preferably, the positioning part is located on the side of the chassis beam away from the locking member.

[0042] In the present application, the above structure makes the positioning part not affect the locking and unlocking process.

[0043] Preferably, the upper end of the positioning part has a guide surface for guiding the positioning part to cooperate with the chassis of the vehicle to align the locking member with the locking mechanism on the chassis of the vehicle.

[0044] In the present application, the above structure realizes the guiding effect by means of the guide surface, and improves the positioning accuracy.

[0045] Preferably, the positioning part is an L-shaped plate comprising two connected rib plates, and an inclined guide surface is arranged on one of the rib plates.

[0046] In the present application, the above structure makes the positioning part have a larger compatible range and better structural strength.

[0047] Preferably, a lifting hole is arranged in the upper part of the other rib plate.

[0048] In the present application, the above structure enables the battery pack assembly to be transported in a lifting manner.

[0049] Preferably, the positioning part is a wedge-shaped block with a narrow upper part and a wide lower part, the wedge-shaped block has an inclined guide surface on the upper edge, and a lifting hole is arranged in the side surface of the wedge-shaped block.

[0050] In the present application, by the above structure, another structure of the positioning part is provided.

[0051] Preferably, the battery pack assembly further comprises a protective steel plate covering the bottom surface of the entire battery pack frame.

[0052] In the present application, by covering the bottom surface of the battery pack assembly with the protective steel plate, the damage of the battery pack assembly by flying stones can be prevented.

[0053] Preferably, the battery pack assembly further comprises a water-cooled unit and / or a high-voltage box, which are installed at the front end of the battery pack frame.

[0054] In the present application, the water-cooled unit and / or the high-voltage box of the battery pack assembly are hung on the side surface of the bracket, without affecting the disassembly of the battery panel body.

[0055] Preferably, the battery pack assembly further comprises a skin, which is arranged on the top and both sides of the battery pack frame.

[0056] In the present application, the skin is used to cover the upper surface and the left and right surfaces, which can play a role in waterproofing and dustproofing.

[0057] An electric vehicle comprises the battery pack assembly as described above and a chassis main beam, and the battery pack assembly is fixedly connected to the chassis main beam by the locking member.

[0058] The positive progress effect of the present application is that the battery pack assembly and the electric commercial vehicle comprising the same install the battery packs in multiple battery compartments respectively, so that the overall structure of the battery pack assembly is reasonably arranged, the disassembly of multiple battery modules can be independently completed, and the individual maintenance of each battery module and the simultaneous maintenance of multiple battery modules are facilitated, and the assembly type and the maintainability are high. The battery pack assembly is connected to the chassis main beam through the locking member in the middle hollow area, so that the connection between the battery pack and the chassis main beam is more stable; the center of gravity of the quick-change battery pack can be effectively reduced, and the stability of the quick-change battery pack is increased, which provides a larger space for the vehicle stability and safety. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 It is a schematic diagram of the overall structure of the battery pack assembly of the present application embodiment 1.

[0060] Figure 2 It is a schematic diagram of the internal structure of the battery pack assembly of the present application embodiment 1.

[0061] Figure 3 It is a schematic diagram of the structure of the battery pack frame in the battery pack assembly of the present application embodiment 1.

[0062] Figure 4Structure diagram of a battery module of Embodiment 1 of the present application.

[0063] Figure 5 Structure diagram of a total electrical connector in a battery pack assembly of Embodiment 1 of the present application.

[0064] Figure 6 Partial enlarged view of a positioning portion in the battery pack assembly of Embodiment 1 of the present application.

[0065] Figure 7 Overall structure diagram of an electric vehicle of Embodiment 1 of the present application, wherein a battery module is not shown.

[0066] Explanation of reference numerals:

[0067] Battery pack assembly 100

[0068] Battery module 101

[0069] Battery pack frame 110

[0070] Battery compartment 111

[0071] Lateral opening 111a

[0072] Top opening 111b

[0073] Platform 112

[0074] Partition plate 113

[0075] Through hole 114

[0076] Hollow region 120

[0077] Avoidance space 121

[0078] Total electrical connector 130

[0079] First electrical connector 131

[0080] Second electrical connector 132

[0081] Electrical connector 133

[0082] Locking member 141

[0083] Support 142

[0084] L-shaped plate 150

[0085] Guide surface 151

[0086] Hoisting hole 152

[0087] Water cooling unit 160

[0088] High-voltage box 170

[0089] Skin 180

[0090] Chassis main beam 200 Detailed Implementation

[0091] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0092] Example 1

[0093] like Figures 1-7 As shown, this embodiment provides a battery pack assembly 100, which includes a battery pack frame 110 and a plurality of battery modules 101. The battery pack frame 110 is provided with a plurality of battery compartments 111 for accommodating the battery modules 101. Each battery compartment 111 is provided with an opening, which allows the battery modules 101 to enter or exit the battery compartment 111 independently.

[0094] In this embodiment, the battery pack assembly 100 is used to install the battery modules 101 into multiple battery compartments 111, making the overall structure of the battery pack assembly 100 reasonably arranged and enabling the independent assembly and disassembly of multiple battery modules 101. With this structure, when a single battery module 101 is depleted or malfunctions, the battery module 101 to be replaced can be removed individually from the opening without affecting other battery modules 101. This facilitates individual maintenance of each battery module 101 as well as simultaneous maintenance of multiple battery modules 101, resulting in high maintainability.

[0095] Specifically, in this embodiment, the battery pack frame 110 is provided with a multi-layer platform 112, and each layer platform 112 is provided with a plurality of battery compartments 111. The multi-layer platform 112 includes at least a bottom platform 112 and a top platform 112. The battery compartments 111 located on the bottom platform 112 are provided with lateral openings 111a, and the battery compartments 111 located on the top platform 112 are provided with top openings 111b.

[0096] Specifically, for the top platform 112, the battery module 101 can be placed into or removed from the battery compartment 111 through the top opening 111b; for the bottom platform 112, the battery module 101 can be placed into or removed from the battery compartment 111 through the side opening 111a. In other embodiments of the present invention, the platform 112 can be multi-layered according to the actual dimensions of the battery module 101 and the vehicle chassis structure, so as to further increase the number of battery modules 101 in the battery pack assembly 100.

[0097] Specifically, in this embodiment, a partition 113 is also provided between the battery compartments 111 to separate the battery modules 101. It should be noted that even if the battery modules 101 are fixed inside the battery compartments 111 in some way, a partition 113 should still be provided between the battery compartments 111 to ensure that the battery modules 101 do not affect each other. Besides preventing the battery modules 101 from colliding with each other, this also increases the safety performance of the battery pack assembly 100.

[0098] Specifically, such as Figures 1-7 As shown, in this embodiment, the middle part of the battery pack frame 110 has a hollow area 120, and the battery compartments 111 are symmetrically distributed on both sides of the hollow area 120. The hollow area 120 in this embodiment is not only a planar hollow area, but also a three-dimensional hollow area. Besides reducing weight, it also allows for the rational use of limited materials and structures to achieve better mechanical properties for the battery pack assembly.

[0099] Furthermore, in this embodiment, the hollowed-out area 120 includes a clearance space 121 extending through the battery pack frame 110 along the length of the battery pack assembly 100. The clearance space 121 mates with the vehicle's chassis main beam 200. During installation, the chassis main beam 200 and the clearance space 121 form a mating connection, making the structure more compact. Specifically, as shown... Figure 7 As shown, the chassis main beam 200 enters the clearance space 121 in a similar embedded manner. At this time, the clearance space 121 extends along the length of the chassis main beam 200, and the battery compartment 111 of the battery pack assembly 100 is distributed on both sides of the chassis main beam 200. This arrangement can make reasonable use of space and is more conducive to installing the battery pack assembly 100 on the chassis main beam 200 of the vehicle.

[0100] In other embodiments of the present invention, a battery pack frame 110 may also be used that is closed at one or both ends and has a through clearance space 121 in the middle. As long as it has a complete through clearance space 121 for accommodating the chassis main beam 200, it should fall within the protection scope of the present invention.

[0101] Specifically, in this embodiment, the battery pack assembly 100 further includes a main electrical connector 130 that is electrically connected to the vehicle. The main electrical connector 130 is installed at the front end of the battery pack frame 110 and is connected to the battery module 101 via a circuit. The main electrical connector 130 includes a first electrical connector 131 and a second electrical connector 132.

[0102] Further, each battery module 101 on each layer platform 112 is provided with an electrical connector 133, which is used to connect the battery module 101 to the total electrical connector 130 through a connecting circuit. In this embodiment, a first circuit and a second circuit are included, and the plurality of battery modules 101 on one side of the hollow region 120 are connected in series through the first circuit, and the first circuit is connected to the first electrical connector 131, and the plurality of battery modules 101 on the other side of the hollow region 120 are connected in series through the second circuit, and the second circuit is connected to the second electrical connector 132. The first electrical connector 131 and the second electrical connector 132 are connected in parallel to the vehicle. The first electrical connector 131 and the second electrical connector 132 can be connected to the plurality of battery modules on both sides of the hollow region 120 in advance, and during the installation of the battery pack assembly to the electric vehicle, the vehicle connector directly connects to the plurality of battery modules through the first electrical connector 131 and the second electrical connector 132, reduces the electrical connection interface of the electric vehicle and the battery pack assembly, improves the assembly efficiency of the two, and improves the success rate of assembly.

[0103] In this embodiment, the first and second electrical connectors are separately provided as the joint part of the battery pack assembly 100, which is convenient for disassembly and assembly. During installation, since the battery modules 101 in the battery pack assembly 100 are connected in series with each other, only the first and second circuits need to be connected to the first and second electrical connectors, respectively, and then the first and second electrical connectors are connected to the vehicle, and the power part of the vehicle can be installed.

[0104] The plurality of battery modules on both sides of the battery pack assembly are connected in series, which is convenient for unified management of the plurality of battery modules, reduces the output interface, and the battery modules connected in series on both sides of the battery pack assembly are connected to the first electrical connector and the second electrical connector, respectively, to realize parallel connection of the battery modules on both sides of the battery pack assembly, which can improve the cruising range of the vehicle.

[0105] Specifically, in this embodiment, at least a part of the first and second circuits is arranged in the hollow region 120. The first and second circuits are connected from the battery pack frame 110 on both sides of the hollow region 120, and finally connected to the first and second electrical connectors at the front end of the battery pack frame 110. The wiring path of the first and second circuits is arranged to pass through the hollow region 120, which can reduce the wiring difficulty, make the overall structure layout more reasonable, and facilitate disassembly and assembly.

[0106] Further, the battery pack frame 110 is further provided with a plurality of through holes 114 for the circuit to pass through. Specifically, the first and second circuits pass through the through holes 114 and enter the hollow region 120. Those skilled in the art should understand that, in the present embodiment, the through holes 114 for the circuit to pass through are provided, which is more convenient for the arrangement of the circuit part and simplifies the overall structure of the battery pack assembly 100. Similarly, under the condition of meeting the condition, the circuit part can also be accommodated or constrained on the surface and inside of the battery pack frame 110 by using a line fixing device or in the form of a pre-installed pipeline.

[0107] Specifically, as shown in Figures 1-7 the present embodiment, the middle part of the battery pack frame 110 is provided with a locking member, which can be arranged on the surface of the avoiding region or the side wall of the battery compartment 111 close to the avoiding region. The battery pack assembly 100 is detachably installed on the chassis main beam 200 through the locking member 141. After the whole battery pack assembly 100 or the battery pack frame 110 cooperates with the chassis main beam 200, the battery pack assembly 100 is locked on the chassis main beam 200 through the locking member 141, so that the connection between the battery pack assembly 100 and the vehicle chassis is more firm. The locking member in the present embodiment is arranged at the middle part of the battery pack frame 110, which maintains a relatively balanced stress and can better bear the weight of the battery pack assembly 100.

[0108] Specifically, in the present embodiment, as shown in Figure 3 the locking member 141 is a lock shaft, which is arranged outside the side wall of the battery compartment 111 close to the hollow region 120. The lock shaft is installed on the side wall of the battery compartment 111 through a support 142. The lock shaft extends from the surface of the support 142 to the middle part of the battery pack assembly 100.

[0109] When the battery pack assembly 100 cooperates with the chassis main beam 200, the chassis main beam 200 is located at the middle part of the battery pack assembly 100. The lock shaft arranged on the side wall of the battery compartment 111 is towards the side of the chassis main beam 200 and extends towards the chassis main beam 200, realizing the connection between the battery pack assembly 100 and the chassis main beam 200. The chassis main beam 200 is provided with a lock base, the lock base is provided with a lock slot, and the lock slot is provided with a lock tongue capable of closing the lock slot. As the battery pack assembly 100 approaches the chassis main beam 200, the lock shaft also enters the lock slot on the chassis main beam 200. Then, the locking operation is performed, the lock shaft is locked in the lock slot by the lock tongue in the lock slot, and enters a stable locking state. In the locking state, the battery pack assembly 100 does not move relative to the chassis main beam 200.

[0110] In the embodiment, the locking member is a locking shaft, and correspondingly, the locking mechanism adopts the form of the locking shaft cooperating with the locking base. In other embodiments of the application, the locking member can also include a first threaded portion or a stop portion, the first threaded portion or the stop portion is arranged on the surface of the avoiding area, and the locking base on the chassis main beam 200 is provided with a second threaded portion or a limiting portion matched therewith, so as to realize the locking or unlocking of the locking member and the chassis main beam 200 in the vertical direction. By adopting the above locking structure, the locking member and the locking base can be locked only in the vertical direction, the installation connection form is diversified, the connection is more stable, and the structural space utilization rate is high.

[0111] For the above two forms, the following is an example.

[0112] For the embodiment in which the locking member adopts the first threaded portion, correspondingly, the locking member is arranged on the surface of the avoiding area, and the chassis main beam 200 is also provided with a second threaded portion matched therewith. When the battery pack assembly 100 and the chassis main beam 200 are close to each other, the unlocking mechanism will exert a torque for locking on the locking member until it is confirmed that the locking is completed, so as to realize the locking or unlocking of the locking member and the chassis main beam 200 in the vertical direction. Conversely, when unlocking is needed, the unlocking mechanism will exert a torque (opposite to the torque direction for locking) on the locking member until unlocking, and the battery pack assembly 100 and the chassis main beam 200 are gradually separated in the process.

[0113] For the embodiment in which the locking member adopts the stop portion, the stop portion can be a T-shaped rod, and its arrangement and principle are basically the same as the above scheme. The cooperation or separation of the stop portion and the limiting portion is controlled to achieve the purpose of unlocking or locking, which will not be described here.

[0114] Specifically, in the embodiment, the middle part of the battery pack frame 110 is also provided with a positioning portion, the positioning portion is used for positioning the battery pack assembly 100, and the positioning portion abuts against the chassis main beam 200 of the vehicle. By using the positioning portion abutting against the chassis of the vehicle, the battery pack assembly 100 can be positioned during installation, so that the installation of the battery pack assembly 100 can be quickly and accurately realized.

[0115] The positioning portion in the embodiment is located on the side of the chassis main beam 200 away from the locking member. Since the locking member is installed on the side wall of the battery compartment 111 and extends to the chassis main beam 200, the actual position of the positioning portion arranged on the middle part of the battery pack frame 110 is located on the opposite sides of the two chassis main beams 200. For some chassis main beams 200 with space, the positioning portion is easier to cooperate with them, but for the chassis main beams 200 with large structure and high strength requirement, which cannot form an avoiding area, a mounting bracket can be arranged on the chassis main beam 200 to facilitate the cooperation between the positioning portion and the mounting bracket.

[0116] An example is shown as follows: in the embodiment, the positioning part is inserted from the bottom of the chassis girder 200, and cooperates with the mounting frame mounted on the chassis girder 200, so as to realize the positioning effect.

[0117] Specifically, as shown in the figure, Figures 1-7 the positioning part in the embodiment is an L-shaped plate 150, which includes two connected rib plates. Among them, the upper edge of one rib plate of the L-shaped plate 150 is provided with an inclined guide surface 151, which is used to guide the cooperation of the positioning part with the vehicle chassis, so as to realize the alignment of the locking member with the locking mechanism on the vehicle chassis, and improve the positioning accuracy; a lifting hole 152 is formed in the upper part of the other rib plate of the L-shaped plate 150, which is used to realize the transportation of the battery pack assembly 100 during lifting.

[0118] Those skilled in the art should understand that although the positioning part in the embodiment is an L-shaped plate 150, additionally, in other embodiments of the application, the positioning part is a wedge-shaped block with a narrow upper part and a wide lower part. Among them, the upper edge of the wedge-shaped block has an inclined guide surface 151, and the side surface of the wedge-shaped block is provided with a lifting hole 152. Since the wedge-shaped block has similar structural features to the L-shaped plate in the embodiment, it can achieve similar positioning effect, guiding effect and lifting effect when used, so the above-mentioned embodiments should also fall within the protection scope of the application.

[0119] Specifically, as shown in the figure, Figures 1-7 in the embodiment, the battery pack assembly 100 further includes a water-cooled unit 160 and a high-voltage box 170. The water-cooled unit 160 and the high-voltage box 170 are mounted on the front end of the battery pack frame 110.

[0120] In the application, the water-cooled unit 160 and the high-voltage box 170 of the battery pack assembly 100 are hung on the surface of the front end of the battery pack frame 110 to avoid the opening of the battery compartment 111, without affecting the disassembly of the battery module 101.

[0121] Additionally, in the embodiment, the battery pack assembly 100 further includes a protective steel plate covering the bottom surface of the entire battery pack frame 110. The use of the protective steel plate to cover the bottom surface of the battery pack assembly 100 in the embodiment can prevent damage to the battery pack assembly 100 caused by flying stones. Especially for the battery module 101 with explosion risk, the addition of the protective steel plate on the bottom surface can significantly improve its safety performance.

[0122] Additionally, in the embodiment, the battery pack assembly 100 further includes a skin 180 arranged on the top and both sides of the battery pack frame 110. In the embodiment, the skin 180 is used to cover the upper surface and the left and right surfaces of the battery pack assembly 100, which can play a role in waterproofing and dustproofing.

[0123] The embodiment also provides an electric vehicle, which is a commercial vehicle such as a heavy truck or a light truck. The electric vehicle comprises the battery pack assembly 100 and the chassis main beam 200. The battery pack assembly 100 is fixedly connected to the chassis main beam 200 by the locking member. In the electric vehicle, the battery modules 101 are respectively arranged in the plurality of battery compartments 111, so that the overall structure of the battery pack assembly 100 and the chassis main beam 200 is more reasonable. When the battery modules 101 are replaced, the plurality of battery modules 101 can be independently disassembled and assembled.

[0124] By using the technical solutions in the above embodiment, the height space below the chassis main beam 200 is fully utilized. When the battery pack assembly is disassembled by the battery replacing equipment, the empty battery replacing equipment can directly enter the space below the battery pack assembly and does not interfere with the bottom of the electric vehicle. When the battery pack assembly is installed by the battery replacing equipment, the battery replacing equipment carrying the battery pack assembly can also directly enter the space below the chassis main beam 200 to replace the battery and does not interfere with the bottom of the electric vehicle. In the whole process, the vehicle body does not need to be lifted, and a sunken space or a pit does not need to be set for the battery replacing equipment to enter and exit, so that the construction cost, time and difficulty of the battery replacing station are reduced, the requirements for the construction site are reduced, and the efficiency of the battery replacing is improved.

[0125] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A battery pack assembly, characterized by, The battery pack assembly comprises a battery pack frame and a plurality of battery modules, the battery pack frame is provided with a plurality of battery compartments for accommodating the battery modules, and each battery compartment is provided with an opening for the battery module to independently enter or move out of the battery compartment. The battery pack frame is provided with a plurality of platforms, and each platform is provided with a plurality of battery compartments. The plurality of platforms at least comprises a bottom platform and a top platform, the battery compartments on the bottom platform are provided with lateral openings, and the battery compartments on the top platform are provided with top openings. The battery pack frame is provided with a plurality of platforms, and each platform is provided with a plurality of battery compartments.

2. The battery pack assembly of claim 1, wherein, The middle part of the battery pack frame has a hollow area, and the battery compartments are symmetrically distributed on both sides of the hollow area.

3. The battery pack assembly of claim 2, wherein, The hollow area comprises an avoidance space penetrating through the battery pack frame, and the avoidance space cooperates with the chassis beam of the vehicle.

4. The battery pack assembly of claim 3, wherein, The battery pack assembly further comprises a total electrical connector electrically connected with the vehicle, the total electrical connector is installed at the front end of the battery pack frame, and the total electrical connector is connected with the battery modules through an electrical circuit.

5. The battery pack assembly of claim 4, wherein, The total electrical connector comprises a first electrical connector and a second electrical connector, and the first electrical connector and the second electrical connector are respectively connected to the part of the battery pack assembly located on the left and right sides of the chassis beam of the vehicle.

6. The battery pack assembly of claim 5, wherein, Each battery module is provided with an electrical connector for connecting the electrical circuit and the battery module.

7. The battery pack assembly of claim 6, wherein, The electrical circuit comprises a first electrical circuit and a second electrical circuit, the battery modules on one side of the battery pack assembly are connected in series through the first electrical circuit, and the battery modules on the other side of the battery pack assembly are connected in series through the second electrical circuit, and the first electrical circuit and the second electrical circuit are respectively connected to the first electrical connector and the second electrical connector.

8. The battery pack assembly of claim 4, wherein, The electrical circuit is at least partially arranged in the hollow area.

9. The battery pack assembly of claim 8, wherein, The battery pack frame is further provided with a plurality of through holes for the electrical circuit to pass through.

10. The battery pack assembly of claim 2, wherein, The middle part of the battery pack frame has a locking member, and the battery pack assembly is detachably installed on the chassis beam of the vehicle through the locking member.

11. The battery pack assembly of claim 10, wherein, The locking member is a lock shaft, which is arranged outside the side wall of the battery compartment near the hollow area.

12. The battery pack assembly of claim 11, wherein, The lock shaft is installed on the side wall of the battery compartment through a support, and the lock shaft extends from the surface of the support to the middle part of the battery pack assembly.

13. The battery pack assembly of claim 10, wherein, The locking member comprises a threaded portion or a stop portion.

14. The battery pack assembly of claim 10, wherein, The middle part of the battery pack frame is further provided with a positioning portion for positioning the battery pack assembly, and the positioning portion abuts against the chassis beam of the vehicle.

15. The battery pack assembly of claim 14, wherein, The positioning portion is located on the side of the chassis beam away from the locking member.

16. The battery pack assembly of claim 14, wherein, The upper end of the positioning portion has a guide surface for guiding the positioning portion to cooperate with the chassis of the vehicle to align the locking member with the locking mechanism on the chassis of the vehicle.

17. The battery pack assembly of claim 16, wherein, The positioning portion is an L-shaped plate comprising two connected rib plates, and an inclined guide surface is arranged on one of the rib plates.

18. The battery pack assembly of claim 17, wherein, A hoisting hole is formed in the upper part of the other rib plate.

19. The battery pack assembly of claim 16, wherein, The positioning portion is a wedge-shaped block with a narrow upper part and a wide lower part, the wedge-shaped block has an inclined guide surface on the upper part, and a hoisting hole is formed in the side surface of the wedge-shaped block.

20. The battery pack assembly of claim 1, wherein, The battery pack assembly further comprises a protective steel plate covering the bottom surface of the entire battery pack frame.

21. The battery pack assembly of claim 1, wherein, The battery pack assembly further comprises a water cooling unit and / or a high-voltage box installed at the front end of the battery pack frame.

22. The battery pack assembly of claim 1, wherein, The battery pack assembly further comprises a skin arranged on the top and both sides of the battery pack frame.

23. An electric vehicle, characterized by The battery pack assembly according to any one of claims 1-22 is fixedly connected to a chassis main beam by a locking member.

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