Vehicle battery pack mounting structure and method

Abstract

The invention provides a battery pack mounting structure for a vehicle, which comprises a first battery mounting unit, and the first battery mounting unit comprises a first square frame, a second square frame and a third square frame which are sequentially arranged at intervals in the direction of a longitudinal beam; the first longitudinal supporting rod and the second longitudinal supporting rod are arranged in parallel; the third longitudinal supporting rod and the fourth longitudinal supporting rod are arranged in parallel; a first guard plate bracket; a first vertical rod, a second vertical rod, a third vertical rod and a fourth vertical rod; a plurality of rubber bushings or elastic connectors; a plurality of mounting brackets; the first connecting pieces are arranged on the first square frame, the second square frame and the third square frame; and the second connecting pieces are arranged on the first square frame, the second square frame and the third square frame. The first battery installation unit and the battery pack can be pre-installed in a factory, the first battery installation unit and the battery pack can be connected to the installation support on the longitudinal beam only through a rubber bushing or an elastic connecting piece on site, the length is adjustable, light weight is achieved, and the invention further provides an installation method of the battery pack for the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle parts, and in particular to a vehicle battery pack installation structure and method. Background Art

[0002] At present, the domestic heavy-duty commercial vehicle market is gradually electrifying, and the models on the market basically adopt Figure 7 The battery pack bracket structure shown in the figure includes end brackets at both ends, an L-shaped bracket between the end brackets, and a rectangular frame. The lower battery is accommodated and fixed in the rectangular frame, and the upper battery is fixed on the top of the rectangular frame. The end brackets, the L-shaped brackets, and the rectangular frame, as well as the components of the rectangular frame, are rigidly welded. During the bumpy driving of the vehicle, the battery pack is susceptible to greater impact. In addition, the on-site welding and installation of the bracket is time-consuming and labor-intensive, with low efficiency and a complex bracket structure.

[0003] In addition, Chinese patent ZL202421720085.6 discloses a battery pack bracket for new energy vehicles, see Figure 8 , which includes a first battery mounting unit, the first battery mounting unit including:

[0004] The first suspension bracket 1 and the second suspension bracket are arranged at intervals and are horizontally installed on the outer side of the frame longitudinal beam 6;

[0005] A battery frame 3, used to accommodate and fix the first battery pack located on the upper layer and the second battery pack located on the lower layer;

[0006] A first side bracket and a second side bracket 2 are arranged at a first end of the battery frame 3;

[0007] A third side bracket and a fourth side bracket are disposed at the second end of the battery frame 3; and

[0008] Among them, the first side bracket and the second side bracket 2 are connected to the first suspension bracket through rubber bushings or elastic connectors 5 respectively; the third side bracket and the fourth side bracket are connected to the second suspension bracket through rubber bushings or elastic connectors respectively.

[0009] However, this battery pack bracket is heavy, about 800kg, and the first suspension bracket 1 and the second suspension bracket set at both ends limit the length of the battery pack, which cannot adapt to battery packs of different length specifications and increases the wheelbase of the vehicle. How to improve the adaptability of different battery models, reduce the wheelbase of the vehicle, and achieve lightweight battery pack brackets is an urgent problem to be solved.

[0010] Therefore, it is necessary to study a vehicle battery pack installation structure and method to solve one or more of the above-mentioned technical problems. Summary of the invention

[0011] In order to solve at least one of the above technical problems, according to one aspect of the present invention, a vehicle battery pack mounting structure is provided, characterized in that it includes a first battery mounting unit, which is arranged between two longitudinal beams of a new energy vehicle and includes:

[0012] A first square frame, a second square frame and a third square frame are sequentially arranged at intervals along the longitudinal beam direction;

[0013] A first longitudinal support rod and a second longitudinal support rod are arranged in parallel, connected between the bottoms of the first square frame, the second square frame and the third rectangular frame, and define a first lower battery pack installation space together with the first square frame, the second square frame and the third rectangular frame;

[0014] A third longitudinal support rod and a fourth longitudinal support rod arranged in parallel, connected between the tops of the first square frame, the second square frame and the third square frame;

[0015] A first guard plate bracket is arranged in parallel above the third longitudinal support rod and the fourth longitudinal support rod;

[0016] The first vertical pole, the second vertical pole, the third vertical pole and the fourth vertical pole are respectively connected to the two ends of the first longitudinal support rod and the third longitudinal support rod, the two ends of the second longitudinal support rod and the fourth longitudinal support rod, and the four ends of the first guard plate bracket; the first guard plate bracket, the third longitudinal support rod and the fourth longitudinal support rod, and the first vertical pole, the second vertical pole, the third vertical pole and the fourth vertical pole jointly define the first upper battery pack installation space;

[0017] A plurality of rubber bushings or elastic connectors are respectively arranged on the first square frame, the second square frame and the third square frame;

[0018] A plurality of mounting brackets are arranged at intervals and connected to the outer sides of the two longitudinal beams, and are connected to the plurality of rubber bushings or elastic connectors in a one-to-one correspondence;

[0019] A first connecting member is provided on the first square frame, the second square frame and the third square frame; and

[0020] A second connecting member is provided on the first square frame, the second square frame and the third square frame;

[0021] The second battery mounting unit is connected to the first battery mounting unit via the first connecting member and the second connecting member.

[0022] According to another aspect of the present invention, the lengths of the first and second longitudinal support bars are adjustable to accommodate battery packs of different lengths, and the lengths of the third and fourth longitudinal support bars are adjustable to accommodate battery packs of different lengths.

[0023] According to another aspect of the present invention, the first battery mounting unit and the battery pack contained in the first battery mounting unit are prefabricated in a factory and hoisted or lifted from bottom to top on site as a whole to connect to a plurality of mounting brackets provided on the longitudinal beam.

[0024] According to yet another aspect of the present invention, the first guard plate bracket includes a square frame and longitudinal beams, transverse beams and / or diagonal beams arranged in the square frame.

[0025] According to another aspect of the present invention, the first longitudinal support rod and the second longitudinal support rod are L-shaped and supported on the upper surfaces of the bottom beams of the first square frame, the second square frame and the third square frame, the third longitudinal support rod and the fourth longitudinal support rod are L-shaped and supported on the upper surfaces of the top beams of the first square frame, the second square frame and the third square frame, and support pads are also arranged at intervals on the upper surfaces of the bottom beam and the top beam.

[0026] According to another aspect of the present invention, the second battery mounting unit is arranged on the outside of two longitudinal beams of the new energy vehicle and comprises:

[0027] A fourth square frame, a fifth square frame and a sixth square frame are sequentially arranged at intervals along the longitudinal beam direction;

[0028] A fifth longitudinal support rod and a sixth longitudinal support rod arranged in parallel are connected between the bottoms of the fourth square frame, the fifth square frame and the sixth square frame and define a second lower battery pack installation space together with the fourth square frame, the fifth square frame and the sixth square frame;

[0029] A seventh longitudinal support rod and an eighth longitudinal support rod arranged in parallel, connected between the tops of the fourth square frame, the fifth square frame and the sixth square frame;

[0030] A second guard plate bracket is arranged in parallel above the seventh longitudinal support rod and the eighth longitudinal support rod;

[0031] The fifth vertical rod, the sixth vertical rod and the seventh vertical rod are respectively connected to the side surfaces of the fifth longitudinal support rod and the seventh longitudinal support rod, and the first side surface of the second guard plate bracket;

[0032] The eighth vertical pole, the ninth vertical pole and the tenth vertical pole are respectively connected to the top surfaces of the fourth square frame, the fifth square frame and the sixth square frame, and the second side surface of the second guard plate bracket; the second guard plate bracket, the third longitudinal support rod and the fourth longitudinal support rod, and the fifth to tenth vertical poles jointly define the second upper battery pack installation space;

[0033] A third connecting member is provided on a side of the fourth square frame, the fifth square frame and the sixth square frame that is adjacent to the longitudinal beam; and

[0034] a fourth connecting member, disposed on a side of the fourth square frame, the fifth square frame and the sixth square frame adjacent to the longitudinal beam;

[0035] The third connecting member is connected to the first connecting member and the fourth connecting member is connected to the second connecting member for connecting the second battery mounting unit to the first battery mounting unit.

[0036] According to yet another aspect of the present invention, the lengths of the fifth to eighth longitudinal support bars are adjustable to accommodate battery packs of different lengths.

[0037] According to another aspect of the present invention, the second battery mounting unit and the battery pack contained in the second battery mounting unit are prefabricated in a factory and hoisted and connected to the left and right sides of the first battery mounting unit as a whole on site.

[0038] According to yet another aspect of the present invention, the second guard plate bracket includes a square frame and longitudinal beams, transverse beams and / or diagonal beams arranged in the square frame.

[0039] According to another aspect of the present invention, the fifth longitudinal support rod and the sixth longitudinal support rod are L-shaped and supported on the upper surface of the bottom beam of the fourth square frame, the fifth square frame and the sixth square frame, the seventh longitudinal support rod and the eighth longitudinal support rod are L-shaped and supported on the upper surface of the top beam of the fourth square frame, the fifth square frame and the sixth square frame, and the upper surfaces of the bottom beam and the top beam of the fourth square frame, the fifth square frame and the sixth square frame are also spaced apart with support pads; the second battery mounting unit is also provided with a lifting hole and a battery pack protective plate is also provided on the outside, and the first guard plate bracket and the second guard plate bracket can be omitted according to customer needs.

[0040] According to yet another aspect of the present invention, the second square frame of the first battery mounting unit and the fifth square frame, the sixth upright pole and the ninth upright pole of the second battery mounting unit are omitted.

[0041] The present invention can achieve one or more of the following technical effects:

[0042] 1. Rubber bushings or elastic connectors can buffer and / or absorb the impact of vehicle bumps on the battery pack, thereby improving safety.

[0043] 2. The first battery installation unit and the battery pack can be pre-installed in the factory. On site, you only need to hoist the entire unit and connect it to the mounting bracket on the longitudinal beam through a rubber bushing or an elastic connector. The installation is simple and efficient.

[0044] 3. The second battery mounting unit and the battery pack can be pre-installed in the factory. On site, you only need to connect the entire battery mounting unit to the first battery mounting unit. The vehicle battery pack mounting structure is simpler than the existing technical structure. Compared with the weight of about 800kg in Chinese patent ZL202421720085.6, it can be reduced to about 400kg, achieving lightweight.

[0045] 4. The overall weight is lighter, and the space occupied in the length direction of the vehicle is smaller, which can shorten the vehicle wheelbase. The bracket installation position and the length of the longitudinal support rod can be adjusted to adapt to battery packs of different models and lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] Figure 1 It is a stereoscopic diagram of a vehicle battery pack installation structure according to a preferred embodiment of the present invention.

[0048] Figure 2 It is an overall schematic diagram of a vehicle battery pack mounting structure and a battery pack according to a preferred embodiment of the present invention.

[0049] Figure 3 It is a schematic diagram of a first battery mounting unit of a vehicle battery pack mounting structure according to a preferred embodiment of the present invention.

[0050] Figure 4 for Figure 3 Schematic diagram of the whole (for on-site lifting) of the first battery installation unit with a battery pack installed.

[0051] Figure 5 It is a schematic diagram of a second battery mounting unit of a vehicle battery pack mounting structure according to a preferred embodiment of the present invention.

[0052] Figure 6 This is another stereoscopic view of a vehicle battery pack mounting structure according to a preferred embodiment of the present invention (relative components such as longitudinal beams and cross beams are hidden).

[0053] Figure 7 This is a schematic diagram of the first battery pack bracket structure in the prior art.

[0054] Figure 8 This is a schematic diagram of the second battery pack bracket structure in the prior art. DETAILED DESCRIPTION

[0055] The best implementation mode of the present invention is described below through preferred embodiments in conjunction with the accompanying drawings. The specific implementation mode here is to illustrate the present invention in detail and should not be understood as limiting the present invention. Various deformations and modifications can be made without departing from the spirit and essential scope of the present invention, which should be included in the protection scope of the present invention.

[0056] Example 1

[0057] According to a preferred embodiment of the present invention, see Figure 1-6 , provides a vehicle battery pack installation structure, characterized in that it includes a first battery installation unit 10, the first battery installation unit is arranged between two longitudinal beams 30 of the new energy vehicle, see Figure 3-4 , and include:

[0058] A first square frame 101, a second square frame 101 and a third square frame 101 are sequentially arranged in a longitudinal beam direction;

[0059] The first longitudinal support rod 102 and the second longitudinal support rod 102 are arranged in parallel, connected between the bottoms of the first square frame, the second square frame and the third rectangular frame, and define a first lower battery pack installation space together with the first square frame, the second square frame and the third rectangular frame;

[0060] A third longitudinal support rod 102 and a fourth longitudinal support rod 102 arranged in parallel are connected between the tops of the first square frame, the second square frame and the third square frame;

[0061] A first guard plate bracket 104 is arranged in parallel above the third longitudinal support rod and the fourth longitudinal support rod;

[0062] The first vertical pole 103, the second vertical pole 103, the third vertical pole 103 and the fourth vertical pole 103 are respectively connected to the two ends of the first longitudinal support rod and the third longitudinal support rod, the two ends of the second longitudinal support rod and the fourth longitudinal support rod, and the four ends of the first guard plate bracket; the first guard plate bracket, the third longitudinal support rod and the fourth longitudinal support rod, and the first vertical pole, the second vertical pole, the third vertical pole and the fourth vertical pole jointly define the first upper battery pack installation space;

[0063] A plurality of rubber bushings or elastic connectors 105 are respectively disposed on the first square frame, the second square frame and the third square frame;

[0064] A plurality of mounting brackets 40 are arranged at intervals and connected to the outer sides of the two longitudinal beams 30, and are connected to the plurality of rubber bushings or elastic connectors 105 in a one-to-one correspondence;

[0065] A first connecting member 106, disposed on the first square frame, the second square frame and the third square frame; and

[0066] A second connecting member is provided on the first square frame, the second square frame and the third square frame;

[0067] The second battery mounting unit is connected to the first battery mounting unit via the first connecting member and the second connecting member.

[0068] Preferably, the first connecting member 106 and the second connecting member have threaded holes. The connecting holes (threaded holes) of the square frame casting are not limited to the attached Figure 3 In the form, the connection direction of the threaded hole bolt can be adjusted, or an alternative connection method can be used.

[0069] According to another preferred embodiment of the present invention, the lengths of the first longitudinal support rod and the second longitudinal support rod are adjustable to accommodate battery packs of different lengths, and the lengths of the third longitudinal support rod and the fourth longitudinal support rod are adjustable to accommodate battery packs of different lengths.

[0070] According to another preferred embodiment of the present invention, the first battery mounting unit and the battery pack contained in the first battery mounting unit are prefabricated in a factory and hoisted or lifted from bottom to top on site as a whole to connect to a plurality of mounting brackets provided on the longitudinal beam.

[0071] According to another preferred embodiment of the present invention, the first guard plate bracket includes a square frame and longitudinal beams, transverse beams and / or diagonal beams arranged in the square frame.

[0072] According to another preferred embodiment of the present invention, the first longitudinal support rod and the second longitudinal support rod are L-shaped and supported on the upper surface of the bottom beam of the first square frame, the second square frame and the third square frame, the third longitudinal support rod and the fourth longitudinal support rod are L-shaped and supported on the upper surface of the top beam of the first square frame, the second square frame and the third square frame, and support pads are also arranged on the upper surface of the bottom beam and the top beam. Advantageously, the support pads are used to fix the connection and auxiliary support the bottom of the battery pack.

[0073] According to another preferred embodiment of the present invention, the second battery mounting unit 20 is arranged on the outside of two longitudinal beams of the new energy vehicle and includes:

[0074] A fourth square frame 201, a fifth square frame 201 and a sixth square frame 201 are sequentially arranged in a spaced relationship along the longitudinal beam direction;

[0075] The fifth longitudinal support rod 202 and the sixth longitudinal support rod 202 arranged in parallel are connected between the bottoms of the fourth square frame, the fifth square frame and the sixth square frame and define a second lower battery pack installation space together with the fourth square frame, the fifth square frame and the sixth square frame;

[0076] The seventh longitudinal support rod 202 and the eighth longitudinal support rod 202 arranged in parallel are connected between the tops of the fourth square frame, the fifth square frame and the sixth square frame;

[0077] The second guard plate bracket 205 is arranged in parallel above the seventh longitudinal support rod and the eighth longitudinal support rod;

[0078] The fifth vertical rod 203, the sixth vertical rod 203 and the seventh vertical rod 203 are respectively connected to the side surfaces of the fifth longitudinal support rod and the seventh longitudinal support rod, and the first side surface of the second guard plate bracket 205 ( Figure 5 the outer side of the middle);

[0079] The eighth vertical pole 204, the ninth vertical pole 204 and the tenth vertical pole 204 are respectively connected to the top surfaces of the fourth square frame, the fifth square frame and the sixth square frame, and the second side surface of the second guard plate bracket; the second guard plate bracket 205, the third longitudinal support rod and the fourth longitudinal support rod, and the fifth to tenth vertical poles jointly define the second upper battery pack installation space;

[0080] A third connecting member 207 is provided on a side of the fourth square frame, the fifth square frame and the sixth square frame adjacent to the longitudinal beam; and

[0081] A fourth connecting member 207 is provided on a side of the fourth square frame, the fifth square frame and the sixth square frame adjacent to the longitudinal beam;

[0082] The third connecting member is connected to the first connecting member and the fourth connecting member is connected to the second connecting member for connecting the second battery mounting unit to the first battery mounting unit.

[0083] Preferably, the third connecting member and the fourth connecting member 207 have threaded holes, and the third connecting member and the first connecting member are butted against each other and can be fixedly connected by screws / bolts.

[0084] According to another preferred embodiment of the present invention, the lengths of the fifth to eighth longitudinal support rods are adjustable to accommodate battery packs of different lengths. Figure 5 , there are no obstructions / shields at both ends of the fifth to eighth longitudinal support rods.

[0085] According to another preferred embodiment of the present invention, the second battery mounting unit and the battery pack contained in the second battery mounting unit are prefabricated in a factory and hoisted and connected to the left and right sides of the first battery mounting unit as a whole on site.

[0086] According to another preferred embodiment of the present invention, the second guard plate bracket includes a square frame and longitudinal beams, transverse beams and / or diagonal beams arranged in the square frame.

[0087] According to another preferred embodiment of the present invention, the fifth longitudinal support rod and the sixth longitudinal support rod are L-shaped and supported on the upper surface of the bottom beam of the fourth square frame, the fifth square frame and the sixth square frame, the seventh longitudinal support rod and the eighth longitudinal support rod are L-shaped and supported on the upper surface of the top beam of the fourth square frame, the fifth square frame and the sixth square frame, and the upper surfaces of the bottom beam and the top beam of the fourth square frame, the fifth square frame and the sixth square frame are also spaced apart with support pads (such as Figure 5 As shown). Preferably, the second battery mounting unit is also provided with a lifting hole 206 and a battery pack protective plate is also provided on the outside. Preferably, the first protective plate bracket and the second protective plate bracket can be omitted according to customer needs and installed by the customer later.

[0088] According to another preferred embodiment of the present invention, the second square frame of the first battery installation unit and the fifth square frame, the sixth vertical pole and the ninth vertical pole of the second battery installation unit are omitted. That is to say, when a small-capacity battery pack is selected, the length is much shorter, and two square frames are used to form a set of brackets. Preferably, the number of square frames can be adjusted according to the length of the battery pack, such as two, three or more.

[0089] According to another preferred embodiment of the present invention, a method for installing a battery pack on a vehicle using the aforementioned vehicle battery pack installation structure is characterized by comprising the following steps:

[0090] Prefabricate a first battery mounting unit accommodating a battery pack and a second battery mounting unit accommodating a battery pack in a factory;

[0091] Installing a plurality of mounting brackets on the outer sides of the two longitudinal beams;

[0092] Hoisting a first battery mounting unit containing a battery pack from bottom to top and correspondingly connecting a plurality of rubber bushings or elastic connectors to a plurality of mounting brackets;

[0093] The second battery installation unit containing the battery pack is hoisted and connected to both sides of the first battery installation unit respectively.

[0094] The present invention can achieve one or more of the following technical effects:

[0095] 1. Rubber bushings or elastic connectors can buffer and / or absorb the impact of vehicle bumps on the battery pack, thereby improving safety.

[0096] 2. The first battery installation unit and the battery pack can be pre-installed in the factory. On site, you only need to hoist the entire unit and connect it to the mounting bracket on the longitudinal beam through a rubber bushing or an elastic connector. The installation is simple and efficient.

[0097] 3. The second battery mounting unit and the battery pack can be pre-installed in the factory. On site, you only need to connect the entire battery mounting unit to the first battery mounting unit. The vehicle battery pack mounting structure is simpler than the existing technical structure. Compared with the weight of about 800kg in Chinese patent ZL202421720085.6, it can be reduced to about 400kg, achieving lightweight.

[0098] 4. The overall weight is lighter, and the space occupied in the length direction of the vehicle is smaller, which can shorten the vehicle wheelbase. The bracket installation position and the length of the longitudinal support rod can be adjusted to adapt to battery packs of different models and lengths.

[0099] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A vehicle battery pack installation structure, characterized in that The invention comprises a first battery mounting unit, which is arranged between two longitudinal beams of the new energy vehicle and comprises: A first square frame, a second square frame and a third square frame are sequentially arranged at intervals along the longitudinal beam direction; A first longitudinal support rod and a second longitudinal support rod are arranged in parallel, connected between the bottoms of the first square frame, the second square frame and the third rectangular frame, and define a first lower battery pack installation space together with the first square frame, the second square frame and the third rectangular frame; A third longitudinal support rod and a fourth longitudinal support rod arranged in parallel, connected between the tops of the first square frame, the second square frame and the third square frame; A first guard plate bracket is arranged in parallel above the third longitudinal support rod and the fourth longitudinal support rod; The first vertical pole, the second vertical pole, the third vertical pole and the fourth vertical pole are respectively connected to the two ends of the first longitudinal support rod and the third longitudinal support rod, the two ends of the second longitudinal support rod and the fourth longitudinal support rod, and the four ends of the first guard plate bracket; the first guard plate bracket, the third longitudinal support rod and the fourth longitudinal support rod, and the first vertical pole, the second vertical pole, the third vertical pole and the fourth vertical pole jointly define the first upper battery pack installation space; A plurality of rubber bushings or elastic connectors are respectively arranged on the first square frame, the second square frame and the third square frame; A plurality of mounting brackets are arranged at intervals and connected to the outer sides of the two longitudinal beams, and are connected to the plurality of rubber bushings or elastic connectors in a one-to-one correspondence; A first connecting member is provided on the first square frame, the second square frame and the third square frame; A second connecting member is provided on the first square frame, the second square frame and the third square frame; and The second battery mounting unit is connected to the first battery mounting unit via the first connecting member and the second connecting member.

2. The vehicle battery pack installation structure according to claim 1, characterized in that The lengths of the first longitudinal support rod and the second longitudinal support rod are adjustable to accommodate battery packs of different lengths, and the lengths of the third longitudinal support rod and the fourth longitudinal support rod are adjustable to accommodate battery packs of different lengths.

3. The vehicle battery pack mounting structure according to claim 1 or 2, characterized in that The first battery mounting unit and the battery pack contained in the first battery mounting unit are prefabricated in a factory and hoisted or lifted from bottom to top as a whole on site to be connected to a plurality of mounting brackets disposed on the longitudinal beam.

4. The vehicle battery pack installation structure according to claim 3, characterized in that The first guard plate bracket includes a square frame and longitudinal beams, transverse beams and / or diagonal beams arranged in the square frame.

5. The vehicle battery pack mounting structure according to claim 4, characterized in that The first longitudinal support rod and the second longitudinal support rod are L-shaped and supported on the upper surfaces of the bottom beams of the first square frame, the second square frame and the third square frame. The third longitudinal support rod and the fourth longitudinal support rod are L-shaped and supported on the upper surfaces of the top beams of the first square frame, the second square frame and the third square frame. Support pads are also arranged at intervals on the upper surfaces of the bottom beam and the top beam.

6. The vehicle battery pack mounting structure according to claim 1 or 2, characterized in that The second battery mounting unit is arranged on the outside of two longitudinal beams of the new energy vehicle and comprises: A fourth square frame, a fifth square frame and a sixth square frame are sequentially arranged at intervals along the longitudinal beam direction; A fifth longitudinal support rod and a sixth longitudinal support rod arranged in parallel are connected between the bottoms of the fourth square frame, the fifth square frame and the sixth square frame and define a second lower battery pack installation space together with the fourth square frame, the fifth square frame and the sixth square frame; A seventh longitudinal support rod and an eighth longitudinal support rod arranged in parallel, connected between the tops of the fourth square frame, the fifth square frame and the sixth square frame; A second guard plate bracket is arranged in parallel above the seventh longitudinal support rod and the eighth longitudinal support rod; The fifth vertical rod, the sixth vertical rod and the seventh vertical rod are respectively connected to the side surfaces of the fifth longitudinal support rod and the seventh longitudinal support rod, and the first side surface of the second guard plate bracket; The eighth vertical pole, the ninth vertical pole and the tenth vertical pole are respectively connected to the top surfaces of the fourth square frame, the fifth square frame and the sixth square frame, and the second side surface of the second guard plate bracket; the second guard plate bracket, the third longitudinal support rod and the fourth longitudinal support rod, and the fifth to tenth vertical poles jointly define the second upper battery pack installation space; A third connecting member is provided on a side of the fourth square frame, the fifth square frame and the sixth square frame that is adjacent to the longitudinal beam; and a fourth connecting member, disposed on a side of the fourth square frame, the fifth square frame and the sixth square frame adjacent to the longitudinal beam; The third connecting member is connected to the first connecting member and the fourth connecting member is connected to the second connecting member for connecting the second battery mounting unit to the first battery mounting unit.

7. The vehicle battery pack mounting structure according to claim 6, characterized in that The lengths of the fifth to eighth longitudinal support rods are adjustable to accommodate battery packs of different lengths.

8. The vehicle battery pack mounting structure according to claim 7, characterized in that The second battery mounting unit and the battery pack contained in the second battery mounting unit are prefabricated in a factory and hoisted and connected to the left and right sides of the first battery mounting unit as a whole on site.

9. The vehicle battery pack mounting structure according to claim 6, characterized in that The second guard plate bracket includes a square frame and longitudinal beams, transverse beams and / or oblique beams arranged in the square frame; the fifth longitudinal support rod and the sixth longitudinal support rod are L-shaped and supported on the upper surface of the bottom beam of the fourth square frame, the fifth square frame and the sixth square frame, the seventh longitudinal support rod and the eighth longitudinal support rod are L-shaped and supported on the upper surface of the top beam of the fourth square frame, the fifth square frame and the sixth square frame, and the upper surfaces of the bottom beam and the top beam of the fourth square frame, the fifth square frame and the sixth square frame are also spaced apart with support pads; the second battery mounting unit is also provided with a lifting hole and a battery pack protective plate is also provided on the outside; preferably, the second square frame of the first battery mounting unit and the fifth square frame, the sixth vertical pole and the ninth vertical pole of the second battery mounting unit are omitted.

10. A method for installing a battery pack on a vehicle using the vehicle battery pack installation structure according to any one of claims 1 to 9, characterized in that The following steps are involved: Prefabricate a first battery mounting unit accommodating a battery pack and a second battery mounting unit accommodating a battery pack in a factory; Installing a plurality of mounting brackets on the outer sides of the two longitudinal beams; Hoisting a first battery mounting unit containing a battery pack from bottom to top and correspondingly connecting a plurality of rubber bushings or elastic connectors to a plurality of mounting brackets; The second battery installation unit containing the battery pack is hoisted and connected to both sides of the first battery installation unit respectively.

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