Power battery unit assembly, power battery box and electric drive system structure

Abstract

The utility model discloses a power battery unit assembly, a power battery box and an electric drive system structure. The power battery unit assembly comprises a power battery unit, a transition frame, two sliding supports, a plurality of shock absorbers and a plurality of second fasteners, the power battery unit is used for storing electric energy; the transition frame is arranged on the bottom surface of the power battery unit; the two sliding supports are located on the bottom face of the transition frame and symmetrically arranged along the two long edges of the transition frame. The multiple shock absorbers are arranged between the sliding support and the transition frame and fixed to the sliding support through first fasteners. And a plurality of second fasteners are used for fixing the power battery unit and the transition frame on the corresponding shock absorbers from top to bottom. According to the utility model, scattered layout is innovatively improved into integrated layout, the problems of narrow installation and layout space, difficulty in installation and disassembly and the like are solved, and the device has the advantages of low improvement cost, short period, reasonable structure, expandability, upgrading and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of power battery unit assembly, belong to electric drive system structure technical field. BACKGROUND

[0002] New energy engineering machinery equipment, involving power battery layout is different, such as small new energy equipment is generally laid out to vehicle chassis or has counterweight and is replaced counterweight position, large new energy vehicle is laid out to the cab right rear of frame two sides or vehicle head.

[0003] The problems and defects of power battery arrangement to chassis are obvious, in the process of vehicle operation, foreign matter such as mud is immersed, bump damage leads to spontaneous combustion probability, maintenance is very inconvenient;

[0004] The scheme of replacing counterweight is applied to more cases of small-tonnage excavators and other engineering machinery, but only the battery is placed at the original counterweight position, due to the limitation of battery unit standard size, the space utilization rate is not high, and the battery and other related modules such as high and low voltage control components need to be placed in a new position on the whole vehicle.

[0005] Among them, the large equipment currently applied more is light truck wide body vehicle, and the tonnage is generally around one hundred tons after full load, and large power battery is needed due to the weight of the equipment and the load, and the power battery pack module is more, and the installation position is basically arranged in the middle part between the front and rear wheels on both sides, due to the space limitation, the working condition is poor, based on the safety demand, the battery needs to be damped, the damping mode is to use the whole battery box damping, and a plurality of damping pads are arranged between the bottom of the battery box and the upper surface of the suspension beam on the side surface of the frame, considering the centrifugal force influence brought by turning in the process of vehicle driving, damping pads are also arranged at the connection part of the battery box and the side surface of the frame, the main shortcomings of the whole damping scheme are: the battery box and the bottom are connected through damping pads, due to the characteristics of damping pads, when the vehicle encounters uneven ground and vibrates in the process of driving, the damping pads are extruded and plastically deformed by the battery box, and after being extruded, the damping pads are elastically deformed again, which causes a large relative displacement between the whole battery box and the bottom fixing beam in the process, and the fixing bolts between the battery box and the side surface of the frame are subjected to frequent reciprocating shear force for a long time, which causes the connection bolts to be broken and fail prematurely, and in serious cases, the battery box can be thrown out in the process of vehicle turning, which has serious safety hazards.

[0006] Arranged to the right rear of cab, there is safety hazard, and due to space limitation, standard battery box configuration is 282kwh, power is small, endurance is short, charging and replacing frequency is high, and economic benefit is difficult to achieve the expectation. SUMMARY

[0007] The utility model discloses a kind of power battery unit assembly, power battery box and electric drive system structure, and dispersed layout is innovatively improved into integrated layout, solve the problem of narrow installation layout space, difficult installation and disassembly, with the advantages of low improvement cost, short cycle, reasonable structure, can be expanded and upgraded.

[0008] The utility model discloses according to following technical scheme realization:

[0009] Firstly, the utility model provides a kind of power battery unit assembly, comprising:

[0010] Power battery unit, for storing electric energy;

[0011] Transition frame, arranged at the bottom surface of the power battery unit;

[0012] Two sliding supports, located at the bottom surface of the transition frame, and symmetrically arranged along the two long edges of the transition frame;

[0013] Multiple shock absorbers, arranged between the sliding support and transition frame, and fixed on the sliding support by first fastener;

[0014] Multiple second fasteners, in a top-down manner, fix the power battery unit, transition frame on corresponding shock absorber.

[0015] In some embodiments, a heat insulation plate is arranged between the power battery unit and transition frame, and the area of the heat insulation plate is not less than the bottom surface area of the power battery unit;The multiple second fasteners fix the power battery unit, heat insulation plate, transition frame on corresponding shock absorber in a top-down manner.

[0016] In some embodiments, threaded holes are provided on the shock absorber, and through holes coaxially arranged with the threaded holes are provided on the power battery unit, heat insulation plate and transition frame;The second fastener is a bolt, which is screwed into the threaded hole through multiple through holes, thereby fixing the power battery unit, heat insulation plate and transition frame on corresponding shock absorber.

[0017] In some embodiments, a row of fixing plates extending along the length direction and uniformly spaced are provided on the top surface of the sliding support, and at least one threaded hole is provided on the fixing plate;The first fastener is a bolt, which is screwed into the threaded hole through the through hole on the shock absorber, thereby fixing the shock absorber on the fixing plate.

[0018] Secondly, the utility model provides a kind of power battery box, characterized by comprising:

[0019] Box body, composed of frame and chassis;

[0020] A plurality of the above-mentioned power battery unit assemblies are installed in the box in a stacked manner from top to bottom.

[0021] A cover plate is fixed at the top opening surface of the frame to seal the plurality of power battery unit assemblies in the box.

[0022] In some embodiments, the sliding bracket of the power battery unit assembly at the bottom layer is fixed to the bottom frame by fasteners, and the two power battery unit assemblies adjacent to each other are fixed by a pair of bracket beams opposite to each other, which are respectively fixed to the two opposite side plates in the frame.

[0023] In some embodiments, the bracket beam is an angle steel, the vertical plate of the angle steel is fixed to the side plate of the frame by a plurality of bolt and nut assemblies, and the sliding bracket of the power battery unit assembly is fixed to the horizontal plate of the angle steel by fasteners.

[0024] In some embodiments, the frame includes two opposite side plates, a rear plate and a front cover plate; the two side plates, the rear plate and the bottom frame are welded together, the front cover plate is detachably fixed with the two side plates, the cover plate and the bottom frame, and the plurality of power battery unit assemblies are pushed into the box from the side opening left after the front cover plate is removed.

[0025] In some embodiments, each of the two side edges of the front cover plate is provided with a vertically arranged angle steel, a plurality of threaded holes are provided on the angle steel, the two side plates and the front cover plate are provided with through holes coaxially arranged with the threaded holes; the two angle steels are matched with a plurality of bolts to fix the two side plates and the front cover plate together; a plurality of threaded holes are provided at the top and bottom edges of the front cover plate, the cover plate and the bottom frame are provided with through holes coaxially arranged with the threaded holes, and the front cover plate is fixed with the cover plate and the bottom frame by a plurality of bolts; a window is provided on the front cover plate, the window is blocked by a detachable access door; at least two symmetrically arranged lifting lugs are provided on the upper part of the two sides of the frame, and the lifting lugs are fixed to the frame by three triangularly arranged screws.

[0026] In a third aspect, the utility model provides a kind of electric drive system structure, comprising:

[0027] The above-mentioned power battery box;

[0028] An upper frame is installed on the cover plate in the power battery box, for assembling control unit and thermal management unit.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] The dispersed layout is innovatively improved into an integrated layout: the power battery unit, the control unit and the thermal management unit are arranged in an integrated manner, the structure is compact and reasonable, the wire harness and pipeline path requirement is short, the box body and the upper frame can be fixed separately in combination with the space layout; the problems of narrow installation layout space and difficult installation and disassembly are solved;

[0031] After the shock absorber is added to the power battery unit, the problems of narrow installation layout space and difficult installation and disassembly are solved, the power battery unit is directly pushed into the installation point, each battery pack is installed from top to bottom, the fixing screw of each battery pack is fastened from the bottom to the top, and the fixing screw of the lowermost battery pack is fastened from the bottom of the battery box, so that the installation and disassembly are convenient;

[0032] The power battery unit in the box body adopts a separate shock absorption scheme, and the box body is rigidly connected with the equipment, so that the box body connection and fixing scheme is safer and more reliable when the mechanical equipment travels or works;

[0033] The triangular layout of the lifting lugs can effectively solve the influence of the lateral force on the loosening of the fixing screw in addition to the downward gravity when lifting. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0035] In the drawings:

[0036] Figure 1 It is a connection schematic diagram of the power battery unit assembly of the present application;

[0037] Figure 2 It is an exploded schematic diagram of the power battery unit assembly of the present application;

[0038] Figure 3 It is an exploded schematic diagram of the power battery box of the present application;

[0039] Figure 4 It is a connection schematic diagram of the electric drive system structure of the present application.

[0040] Fig. 1, box; 2, upper frame; 3, lower layer of upper frame; 4, water cooling unit; 5, upper layer of upper frame; 6, water tank; 7, DC / DC converter; 8, motor controller; 9, high-voltage box; 10, low-voltage box; 11, water pump; 12, charging port; 13, plug-in interface; 101, bolt; 102, bolt; 103, underframe; 104, sliding support; 105, fixed plate; 106, shock absorber; 107, bolt; 108, transition frame; 109, heat insulation plate; 110, bolt; 111, side plate; 112, lifting lug; 113, rear plate; 114, power battery unit; 115, bolt; 116, bracket beam; 117, sliding support; 118, fixed plate; 119, shock absorber; 120, bolt; 121, transition frame; 122, heat insulation plate; 123, bolt; 124, power battery unit; 125, cover plate; 126, bolt; 127, side plate; 128, front cover plate; 129, access door; 130, cross brace.

[0041] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] As Figure 1 , Figure 2As shown, a power battery unit assembly includes power battery units 114 and 124, transition frames 108 and 121, two slides 104 and 117, multiple shock absorbers 106 and 119, and multiple second fasteners. The power battery units 114 and 124 are used to store electrical energy. The transition frames 108 and 121 are arranged on the bottom surface of the power battery units 114 and 124. The two slides 104 and 117 are located on the bottom surface of the transition frames 108 and 121 and are symmetrically arranged along the two long sides of the transition frames 108 and 121. The multiple shock absorbers 106 and 119 are arranged between the slides 104 and 117 and the transition frames 108 and 121, and are fixed to the slides 104 and 117 by first fasteners. The multiple second fasteners fix the power battery units 114 and 124 and the transition frames 108 and 121 to the corresponding shock absorbers 106 and 119 in a top-to-bottom manner.

[0046] Further options, such as Figure 1 , Figure 2 As shown, heat insulation plates 109 and 122 are arranged between the power battery units 114 and 124 and the transition frames 108 and 121, and the area of ​​the heat insulation plates 109 and 122 is not less than the bottom area of ​​the power battery units 114 and 124; multiple second fasteners fix the power battery units 114 and 124, the heat insulation plates 109 and 122, and the transition frames 108 and 121 to the corresponding shock absorbers 106 and 119 in a top-to-bottom manner.

[0047] Further options, such as Figure 1 , Figure 2 As shown, shock absorbers 106 and 119 are provided with threaded holes, and power battery units 114 and 124, heat insulation plates 109 and 122, and transition frames 108 and 121 are all provided with through holes arranged coaxially with the threaded holes; the second fasteners are bolts 110 and 123, which pass through multiple through holes and are tightened in the threaded holes, thereby fixing the power battery units 114 and 124, heat insulation plates 109 and 122, and transition frames 108 and 121 to the corresponding shock absorbers 106 and 119.

[0048] Further options, such as Figure 1 , Figure 2 As shown, a row of evenly spaced fixing plates 105 and 118 are provided on the top surface of the slides 104 and 117, which extend along their length direction. The fixing plates 105 and 118 are provided with at least one threaded hole. The first fastener is a bolt 107 or 120, which passes through the through hole on the shock absorber 106 and 119 and is screwed into the threaded hole, thereby fixing the shock absorber 106 and 119 to the fixing plates 105 and 118.

[0049] The following is an application example of the above-mentioned power battery cell assembly.

[0050] As Figure 3 , Figure 4 shown, a power battery box, comprising a box body 1, a plurality of power battery unit assemblies and a cover plate 125; the box body 1 is composed of a frame and a chassis 103; the plurality of power battery unit assemblies are installed in the box body 1 in a top-down stacking manner; the cover plate 125 is fixed at the open top surface of the frame by a plurality of bolts 126 to seal the plurality of power battery unit assemblies in the box body 1.

[0051] It should be noted that the box body 1 is customized for power battery units, and the size varies according to the size and quantity requirements of the power battery units, mainly solving the problems of assembly, sealing and convenient maintenance of power battery units, and two power unit assemblies are shown in the figure. Of course, in actual design, it is not limited to the above two power unit assemblies, but can also be three or four power unit assemblies.

[0052] Further scheme, continuing to refer to Figure 3 shown, the sliding supports 104, 117 of the power battery unit assembly at the bottom layer are fixed on the chassis 103 by the bolts 102 (from bottom to top), and the two power battery unit assemblies adjacent to each other are fixed by a pair of opposing bracket beams 116, and the pair of opposing bracket beams 116 are respectively fixed on the two opposing side plates 111, 127 in the frame.

[0053] Further scheme, continuing to refer to Figure 3 shown, the bracket beam 116 is an angle steel, the vertical plate of the angle steel is fixed on the side plates 111, 127 of the frame by a plurality of bolts and nut assemblies, and the sliding supports 104, 117 of the power battery unit assembly are fixed on the horizontal plate of the angle steel by the bolts 115 (from bottom to top).

[0054] It should be noted that the bracket beam 116 in the box body 1 is fixed on the side plate 111 and the side plate 127 by fasteners, and the bracket beam 116 is used for power battery unit compartment fixing. Considering that welding strain, deformation and other errors are easy to cause assembly error too large and cannot be normally assembled, the fastening mode of the bracket beam 116 does not adopt the welding and screw fixing scheme, but adopts the bolt and nut fixing, which is one of the key points for the power battery assembly to realize convenient disassembly and maintenance.

[0055] The specific structure of the above box body is further described below.

[0056] As Figure 3 , Figure 4As shown, the frame includes two opposite sides 111, 127, a rear plate 113 and a front cover plate 128; the two side plates 111, 127, the rear plate 113 and the chassis 103 are welded together, and the front cover plate 128 is detachably fixed with the two side plates 111, 127, the cover plate 125 and the chassis 103, and the plurality of power battery unit assemblies are pushed into the box body 1 from the side opening left after the front cover plate 128 is removed.

[0057] Further, as shown in Figure 3 , Figure 4 As shown, each of the two side edges of the front cover plate 128 is provided with a vertical angle steel, and a plurality of threaded holes are arranged on the angle steel; the two side plates 111, 127 and the front cover plate 128 are provided with through holes coaxially arranged with the threaded holes; the two angle steels are matched with a plurality of bolts to fix the two side plates 111, 127 and the front cover plate 128 together; the top and bottom edges of the front cover plate 128 are each provided with a plurality of threaded holes, and the cover plate 125 and the chassis 103 are provided with through holes coaxially arranged with the threaded holes; the front cover plate 128 is fixed with the cover plate 125 and the chassis 103 by a plurality of bolts; the front cover plate 128 is provided with a window, and the window is blocked by a detachable access door 129; the two side plates 111, 127 are fixed with a cross brace 130 for strengthening the overall strength; the upper two sides of the frame are each provided with two symmetrically arranged lifting lugs 112, and the lifting lugs 112 are fixed on the frame by three triangularly arranged screws.

[0058] It should be noted that the box body 1 is provided with four lifting lugs 112, and the lifting lugs are detachable; each lifting lug 112 is provided with three fixing screws, and the three screws are triangularly arranged; when four lifting lugs are used for lifting, the lifting device will generate a certain oblique tension on each lifting lug; the triangular arrangement of the fixing screws avoids the loosening of the screws caused by the oblique tension, back and forth pulling and vibration of the lifting lugs during frequent lifting.

[0059] Continuing to refer to Figure 1 , Figure 2 As shown, when the upper power unit assembly is assembled, it is lifted or lifted to the bottom of the transition frame 121 into the box body sealing portion; after the power unit assembly bottom sliding support 117 contacts the bracket beam 116, the end surface of the sliding support 117 is directly pushed to the predetermined mark position, and is fixed to the bracket beam 116 by the bolt 115; by constraining the surface roughness of the direct assembly contact surface of the sliding support 117 and the bracket beam 116, the convenient and rapid assembly of the power unit assembly is realized.

[0060] When assembling the bottom power unit assembly, the bottom of the transition frame 108 is lifted or lifted to enter the box seal. After the bottom slide 104 of the power unit assembly contacts the bottom frame 103, the end face of the slide 104 is directly pushed to the predetermined marked position and fixed to the bottom frame 103 by bolts 102. By constraining the surface roughness of the direct assembly contact surface between the slide 104 and the bottom frame 103, the power unit assembly can be assembled conveniently and quickly.

[0061] After the power battery unit is installed and fixed, and the pipeline assembly inside the housing 1 is assembled, the cross brace 130 is installed, the cover plate 125 is fixed to the housing with bolts 126, and the front sealing plate 128 and the inspection door 129 are installed.

[0062] The disassembly sequence of the power unit assembly is the reverse of the installation sequence. First, the bottom power unit assembly is disassembled by removing bolt 102 and dragging slide 104 to move the bottom power unit assembly onto the support frame for transport. Then, bolt 115 is removed and slide 117 is dragged to move the upper power unit assembly onto the support frame for transport.

[0063] The structure of the electric drive system provided by this utility model is described below. The electric drive system structure described below can be referred to in correspondence with the power battery box described above.

[0064] like Figure 4 As shown, the present invention provides an electric drive system structure, including a power battery box and an upper frame 2; the upper frame 2 is used to assemble a control unit and a thermal management unit; the housing 1 is fixed to the beam at a predetermined position of the equipment by bolts 101, and the upper frame 2 is fixed to the housing 1, forming an integrated overall layout. The control unit includes a low-voltage box 10, a high-voltage box 9, a motor controller 8, and a DC / DC converter 7; the thermal management unit includes a water tank 6, a water pump 11 (which is provided with a charging port 12 and a plug interface 13), and a water-cooled unit 4; the upper frame 2 includes an upper frame layer 5 and a lower frame layer 3; the water-cooled unit 4, the low-voltage box 10, and the water pump 11 are placed in the lower frame layer 3, and the DC / DC converter 7, the motor controller 8, the high-voltage box 9, and the water tank 6 are placed in the upper frame layer 5.

[0065] In summary, this utility model provides a power battery unit assembly, a power battery box, and an electric drive system structure, which have the following functions and effects:

[0066] The distributed layout has been innovatively improved into an integrated layout: the power battery unit, control unit and thermal management unit are integrated into a compact and reasonable layout, with short wiring harness and pipeline paths. Combined with the space layout, the enclosure and upper frame can be fixed separately; this solves the problems of limited installation space and difficult installation and disassembly.

[0067] After adding shock absorbers to the power battery unit, in view of the problems of narrow installation layout space, difficult installation and disassembly, etc., the method is improved to directly push into the installation point, and each battery pack is installed from top to bottom, and each battery pack fixing screw is fastened from the bottom to the top, and the lowermost battery pack fixing screw is fastened from the bottom of the whole battery box, which is convenient for installation and disassembly;

[0068] The power battery unit in the box body adopts a separate shock absorption scheme, and the box body is rigidly connected with the equipment, so that the box body connection and fixing scheme is safer and more reliable when the mechanical equipment is running or working;

[0069] The triangular layout of the lifting lugs can effectively solve the influence of lateral force on the loosening of the fixing screw in addition to the downward gravity when lifting.

[0070] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0071] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, combinations of features of different embodiments also mean to be within the protection scope of the present application and form different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0072] The above is only the preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application, and any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned technical content, which does not depart from the technical solution of the present application, is still within the scope of the present application.

Claims

1. A power cell assembly, characterized by The power battery unit assembly comprises: a power battery unit for storing electric energy; a transition frame arranged at the bottom surface of the power battery unit; two slide supports arranged at the bottom surface of the transition frame and symmetrically arranged along the two long edges of the transition frame; a plurality of shock absorbers arranged between the slide supports and the transition frame and fixed on the slide supports by first fasteners; a plurality of second fasteners for fixing the power battery unit, the transition frame and the shock absorbers in a top-down manner.

2. The power battery unit assembly according to claim 1, wherein: a heat insulation plate is arranged between the power battery unit and the transition frame, and the area of the heat insulation plate is not less than the area of the bottom surface of the power battery unit; the plurality of second fasteners fix the power battery unit, the heat insulation plate and the transition frame on the corresponding shock absorbers in a top-down manner.

3. The power battery unit assembly according to claim 2, wherein: threaded holes are arranged on the shock absorbers, and through holes coaxially arranged with the threaded holes are arranged on the power battery unit, the heat insulation plate and the transition frame; the second fasteners are bolts, the bolts are screwed into the threaded holes through the through holes, and the power battery unit, the heat insulation plate and the transition frame are fixed on the corresponding shock absorbers.

4. The power battery unit assembly according to claim 1, wherein: a row of fixing plates extending along the length of the slide support and evenly spaced are arranged on the top surface of the slide support, and at least one threaded hole is arranged on the fixing plate; the first fasteners are bolts, the bolts are screwed into the threaded holes through the through holes on the shock absorbers, and the shock absorbers are fixed on the fixing plates.

5. A battery pack, characterized by The power battery box comprises: a box body composed of a frame and a base frame; a plurality of power battery unit assemblies according to any one of claims 1 to 4 stacked in the box body; a cover plate fixed at the open top surface of the frame to seal the plurality of power battery unit assemblies in the box body.

6. The power battery box according to claim 5, wherein: the slide support of the power battery unit assembly at the bottom layer is fixed on the base frame by fasteners, and the two power battery unit assemblies adjacent to each other are fixed by a pair of opposing bracket beams, and the pair of opposing bracket beams are respectively fixed on the two opposing side plates in the frame.

7. The power battery box according to claim 6, wherein: the bracket beam is an angle steel, the upright plate of the angle steel is fixed on the side plate of the frame by a plurality of bolt and nut assemblies, and the slide support of the power battery unit assembly is fixed on the horizontal plate of the angle steel by fasteners.

8. The power battery box according to claim 5, wherein: the frame comprises two opposing side plates, a rear plate and a front cover plate; the two side plates, the rear plate and the base frame are welded together, the front cover plate is detachably fixed with the two side plates, the cover plate and the base frame, and the plurality of power battery unit assemblies are pushed into the box body through the side opening left after the front cover plate is removed.

9. The power battery box according to claim 8, wherein: Two vertical angle steels are arranged at the two side edges of the front sealing plate, and a plurality of threaded holes are arranged on the angle steels; the two side plates and the front sealing plate are provided with through holes coaxially arranged with the threaded holes; two angle steels are matched with a plurality of bolts to fix the two side plates and the front sealing plate together; A plurality of threaded holes are arranged at the top and bottom edges of the front sealing plate, the cover plate and the bottom frame are provided with through holes coaxially arranged with the threaded holes, and the front sealing plate, the cover plate and the bottom frame are fixed together through a plurality of bolts; A window is arranged on the front sealing plate, and the window is closed by a detachable access door; At least two symmetrical lifting lugs are arranged at the two sides of the upper part of the frame, and the lifting lugs are fixed on the frame through three triangularly arranged screws.

10. An electric drive system architecture, characterized by, Comprise: The power battery box of any one of claims 5 to 9; An upper frame is mounted on the cover plate in the power battery box, and is used for assembling a control unit and a thermal management unit.

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