Integrated structure battery pack announcement test method

Abstract

The present application relates to a method for an announcement test of an integrated structure battery pack, comprising the following steps: obtaining an integrated structure battery pack including a portion of a vehicle body and integrated with a tray-type battery assembly; and conducting an announcement test on the integrated structure battery pack. In the above scheme, by using an integrated structure battery pack including a portion of a vehicle body for the announcement test, the integrated structure battery pack retains the assembly characteristics when the tray-type battery assembly is connected to the vehicle body, and the obtained announcement test data is more meaningful for the actual application of new energy vehicles, and compared with the use of a complete vehicle body, it has a lighter weight, and the energy density of the integrated structure battery pack is higher.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a test method for an integrated structural battery pack. Background Art

[0002] With the continuous development of new energy vehicles, CTC (Cell to Chassis) battery chassis integration technology is becoming more and more widely used. CTC battery chassis integration technology is a tray-type integrated structure that eliminates the traditional upper cover structure of the battery box, integrates the battery with the lower body and chassis, and uses the body to seal the entire battery pack. This integrated structure makes the structure of the entire vehicle extremely compact. While achieving a lightweight design of the entire vehicle, the rigidity of the entire vehicle is also greatly improved due to the high strength and thickness of the body.

[0003] Before new energy vehicles are put on the market, power batteries need to undergo a series of public tests, such as the appearance of the power battery pack, vibration test, extrusion test, immersion test, etc. However, the current national standards and regulations are all for battery pack monomer systems, that is, battery boxes with complete upper and lower covers. There is no public test method for integrated solutions without upper covers. At the same time, it is required that the appearance of the power battery pack in the public test must be consistent with the battery system structure of mass production.

[0004] On the other hand, in the public announcement test of the power battery pack, the energy density of the battery pack must reach 125wh / kg as much as possible. Traditional battery covers are mostly stamped with a single plate, which is light in weight and the energy density of the whole pack can generally reach 140wh / kg. For battery packs with integrated structures, if the vehicle body and battery pack are used for the public announcement test together, due to the heavy vehicle body, the energy density of the whole pack will be difficult to reach 125wh / kg. Summary of the invention

[0005] Based on this, it is necessary to provide an integrated structure battery pack announcement test method, aiming to solve the problem in the prior art that battery packs with integrated structures are not convenient for announcement testing.

[0006] The present application provides an announcement test method for an integrated structure battery pack, comprising the following steps: obtaining an integrated structure battery pack including a portion of a vehicle body and integrated with a tray-type battery assembly; and performing an announcement test on the integrated structure battery pack.

[0007] In the above scheme, by using an integrated structural battery pack including part of the vehicle body for the announcement test, on the one hand, the integrated structural battery pack has a complete structure and can be applied to the announcement test; on the second hand, the integrated structural battery pack retains the assembly characteristics of the tray-type battery assembly when connected to the vehicle body, and the obtained announcement test data is more meaningful for reference to the actual application of new energy vehicles; on the third hand, the integrated structural battery pack includes part of the structure of the vehicle body, and the vehicle body has high strength and thickness, which can increase the overall performance of the integrated structural battery pack and improve the experimental data of structural verification tests such as vibration and extrusion; on the fourth hand, the integrated structural battery pack includes part of the structure of the vehicle body, rather than the complete vehicle body, which has a lighter weight than the complete vehicle body, and the energy density of the integrated structural battery pack is higher.

[0008] The technical solution of this application is further described below:

[0009] In any embodiment, the integrated structure battery pack includes a battery cover having a receiving cavity, and the tray-type battery assembly received in the receiving cavity and connected to the battery cover.

[0010] In any embodiment, the step of obtaining an integrated structural battery pack including a part of a vehicle body and integrated with a tray-type battery assembly comprises the steps of: cutting the vehicle body for connecting the tray-type battery assembly to obtain the battery cover; connecting the battery cover to the tray-type battery assembly to obtain the integrated structural battery pack;

[0011] The accommodating cavity is provided on the vehicle body, and the accommodating cavity is used to install the tray-type battery assembly.

[0012] In any embodiment, the battery cover retains the mounting portion of the vehicle body connected to the tray-type battery assembly.

[0013] In any embodiment, the step of cutting the vehicle body for connecting the tray-type battery assembly to obtain the battery cover includes: cutting the vehicle body along the edge of the accommodating cavity to form the battery cover.

[0014] In any embodiment, the step of cutting the vehicle body used to connect the tray-type battery assembly to obtain the battery cover includes: cutting the vehicle body in the Z direction along the edge of the tray-type battery assembly to obtain the battery cover, wherein the Z direction is consistent with the installation direction of the tray-type battery assembly to the battery cover.

[0015] In any embodiment, the step of cutting the vehicle body used to connect the tray-type battery assembly to obtain the battery cover includes the steps of: cutting the vehicle body along the edge of the accommodating cavity to form the first end of the battery cover; cutting the vehicle body along the edge of the tray-type battery assembly in the Z direction to form the second end of the battery cover, wherein the Z direction is the installation direction of the tray-type battery assembly to the battery cover, and the connection direction from the first end to the second end is along the front-to-back direction of the vehicle body.

[0016] In any embodiment, the battery cover is sealed and connected to the tray-type battery assembly.

[0017] In any embodiment, before the integrated structure battery pack is subjected to a public announcement test, the step of sealing the vehicle body retained by the battery cover is also included.

[0018] In any embodiment, the vehicle body retained by the battery cover is sealed, comprising the following steps: applying sealant to the surface of the battery cover; and sealing the leakage hole of the vehicle body retained by the battery cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide further understanding of this application. The schematic implementation modes and descriptions of this application are used to explain this application and do not constitute improper limitations on this application.

[0020] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is a top view of a vehicle body shown in one embodiment of the present application;

[0022] Figure 2 is a top view of a lightweight vehicle body shown in one embodiment of the present application;

[0023] Figure 3 is a schematic structural diagram of a battery cover shown in one embodiment of the present application;

[0024] Figure 4 yes Figure 2 Schematic diagram of the AA section;

[0025] Figure 5 yes Figure 2 Schematic diagram of the middle BB section;

[0026] Figure 6 yes Figure 2 Schematic diagram of the middle CC section;

[0027] Figure 7 It is a flow chart of the announcement test method of the integrated structure battery pack shown in one embodiment of the present application.

[0028] Description of reference numerals:

[0029] 100, integrated structure battery pack; 110, battery cover; 111, accommodating cavity; 120, tray-type battery assembly; 121, side load-bearing hanging point of battery tray; 122, front load-bearing hanging point of battery tray; 123, rear load-bearing hanging point of battery tray;

[0030] 200. Vehicle body; 201. Seat front crossbeam assembly; 202. Seat rear crossbeam assembly; 203. Central channel assembly; 204. Reinforced structural parts; 205. Leakage holes (one is marked, not all are marked); 206. Front floor panel; 207. Door sill inner panel; 208. Side upper lap boundary; 209. Front panel; 210. Front panel lower crossbeam assembly; 211. Front upper lap boundary; 212. Rear floor panel; 213. Rear floor lower front crossbeam assembly; 214. Rear upper lap boundary. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific implementation methods disclosed below.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] The preferred implementation of the present application is described below in conjunction with the accompanying drawings.

[0040] The integrated battery pack announcement test method shown in one embodiment of the present application includes the following steps: S2: obtaining an integrated structure battery pack 100 including a part of the vehicle body 200 and integrated with a tray-type battery assembly 120; S3: performing an announcement test on the integrated structure battery pack 100. The announcement test includes a vibration test, an extrusion test, a water immersion test, etc.

[0041] The car body Figure 1 and Figure 2 Preferably, the vehicle body 200 is as follows Figure 2 The lightweight vehicle body shown is formed by welding various components of the vehicle body 200 , and the seat crossbeam assembly, the central channel assembly 203 and the reinforcing structure 204 are eliminated.

[0042] During the welding process, the seat beam assembly (including the front seat beam assembly 201 and the rear seat beam assembly 202), the central channel assembly 203 and some other reinforcing structural parts 204 on the front and rear floor assemblies are removed. Such structural parts will release more weight space without affecting the normal welding positioning of the front floor.

[0043] The underbody 200 assembly must undergo normal welding throughout the mass production process. During the welding process, the quality of the welds and the overall progress must be monitored to prevent sheet metal welding from penetrating, causing the integrated structural battery pack 100 to fail the airtightness test during the announcement test, or preventing the battery cover 110 and the tray-type battery assembly 120 from being assembled normally due to parts accuracy issues.

[0044] like Figures 1 to 3 As shown, an integrated structure battery pack 100 applied to the announcement test is shown in an embodiment of the present application, including a tray-type battery assembly 120 ( Figures 1 to 3 The vehicle body 200 includes a battery cover 110 (not shown) and a battery cover 110, which is a part of the vehicle body 200 and includes a housing cavity 111 for housing the tray-type battery assembly 120. The tray-type battery assembly 120 is connected to the battery cover 110 so that the tray-type battery assembly 120 is located in the housing cavity 111.

[0045] The tray-type battery assembly 120 is a battery pack that does not include the battery upper cover 110, and at least includes a battery tray (i.e., a lower box of the battery pack), and battery cells connected in series, parallel, or mixed. The tray-type battery assembly 120 can provide power for new energy vehicles.

[0046] like Figures 1 to 3 As shown, the battery cover 110 is a part of the vehicle body 200 . Figure 1 and Figure 2 is a top view of the vehicle body 200. Generally, the accommodating chamber 111 is connected to the bottom surface of the vehicle body 200 so that the tray-type battery assembly 120 is connected to the vehicle body 200 from bottom to top. Figure 3 The vehicle body 200 partially bulges upward to form a receiving cavity 111, so that when the tray-type battery assembly 120 is connected to the vehicle body 200 from bottom to top, the tray-type battery assembly 120 is at least partially located in the receiving cavity 111 in the installation direction.

[0047] like Figure 3 The battery cover 110 shown is a part of the vehicle body 200, and the portion where the accommodating cavity 111 is located is retained to be connected with the tray-type battery assembly 120, and retains the assembly characteristics when the tray-type battery assembly 120 is connected to the vehicle body 200. It should be noted that the tray-type battery assembly 120 is connected to the vehicle body 200 in a sealed connection, so the connection between the battery cover 110 and the tray-type battery assembly 120 is a sealed connection.

[0048] The tray-type battery assembly 120 is connected to the battery cover 110 to form a complete integrated structural battery pack 100, which can be used to perform a series of public tests, such as the appearance, vibration test, extrusion test, immersion test, etc. of the power battery pack.

[0049] In the above scheme, by using a partial structure of the vehicle body 200 as the battery cover 110, the battery cover 110 is connected to the tray-type battery assembly 120 to form a complete integrated structural battery pack 100, and the integrated structural battery pack 100 is applied to the announcement test. On the one hand, the integrated structural battery pack 100 has a complete structure and can be applied to the announcement test; on the other hand, the integrated structural battery pack 100 retains the assembly characteristics when the tray-type battery assembly 120 is connected to the vehicle body 200, and the obtained announcement test data is more meaningful for the actual application of new energy vehicles; on the third hand, the battery cover 110 is a partial structure of the vehicle body 200, and the vehicle body 200 has high strength and thickness, which can increase the overall performance of the integrated structural battery pack 100 and improve the experimental data of structural verification tests such as vibration and extrusion; on the fourth hand, the battery cover 110 is a partial structure of the vehicle body 200, rather than the complete vehicle body 200, and it has a lighter weight than the complete vehicle body 200, and the energy density of the integrated structural battery pack 100 is higher.

[0050] According to some embodiments of the present application, optionally, step S2: obtaining an integrated structural battery pack 100 including a partial vehicle body 200 and integrated with a tray-type battery assembly 120, includes the following steps: S21: cutting the vehicle body 200 for connecting the tray-type battery assembly 120 to obtain a battery cover 110; S22: connecting the battery cover 110 to the tray-type battery assembly 120 to obtain an integrated structural battery pack 100.

[0051] The battery cover 110 is formed by cutting the vehicle body 200. The cutting path in this embodiment is Figures 4 to 6 As shown by the bold lines in the figure, the cutting paths in other embodiments can be adjusted according to actual process requirements.

[0052] See also Figures 2 to 6 According to some embodiments of the present application, optionally, the battery cover 110 includes a mounting portion of the vehicle body 200 for connecting the tray-type battery assembly 120 .

[0053] The battery cover 110 retains the installation points on the vehicle body 200 for installing the tray-type battery assembly 120. On the one hand, the battery cover 110 retains the assembly characteristics when the tray-type battery assembly 120 is connected to the vehicle body 200; on the other hand, the battery cover 110 is easy to process and can be directly connected to the tray-type battery assembly 120 without the need for reprocessing.

[0054] In such Figure 2 , Figure 3 and Figure 4In the embodiment, the front floor panel 206, the rocker inner panel 207 and the upper side overlapping boundary 208 are part of the vehicle body 200, the battery tray side load-bearing hanging point 121 is part of the tray-type battery assembly 120, and the connection between the vehicle body 200 and the battery tray side load-bearing hanging point 121 is the mounting part of the battery cover 110.

[0055] In such Figure 2 , Figure 3 and Figure 5 In the embodiment, the front panel 209, the front panel lower cross beam assembly 210 and the front upper overlapping boundary 211 are part of the vehicle body 200, the front load-bearing hanging point 122 of the battery tray is part of the tray-type battery assembly 120, and the connection between the vehicle body 200 and the front load-bearing hanging point 122 of the battery tray is the installation part of the battery cover 110.

[0056] In such Figure 2 , Figure 3 and Figure 6 In the embodiment, the rear floor panel 212, the front cross beam assembly 213 under the rear floor and the rear upper overlapping boundary 214 are part of the vehicle body 200, the rear load-bearing hanging point 123 of the battery tray is part of the tray-type battery assembly 120, and the connection between the vehicle body 200 and the rear load-bearing hanging point 123 of the battery tray is the mounting part of the battery cover 110.

[0057] See also Figure 2 , Figure 3 and Figure 5 According to some embodiments of the present application, optionally, the battery cover 110 is formed by cutting the vehicle body 200 along the edge of the accommodating cavity 111 .

[0058] When the vehicle body 200 is cut along the edge of the accommodating cavity 111 to obtain the battery cover 110, it can not only ensure that the battery cover 110 includes the accommodating cavity 111 and has space to accommodate the tray-type battery assembly 120, but also enable the battery cover 110 to have a minimum battery cover 110 structure connected with the tray-type battery assembly 120 to form an integrated structural battery pack 100, thereby reducing the weight of the integrated structural battery pack 100 and obtaining higher energy density test data.

[0059] In such Figures 2 to 6 In the embodiment, the cutting is performed from the side of the mounting portion of the battery upper cover 110 away from the accommodating cavity 111 and the upper end of the accommodating cavity 111. Figure 4 , Figure 4 2 is a schematic diagram of side cutting. To facilitate sealing, the upper end of the accommodating cavity 111 may be cut at the upper overlapping boundary 208 between the sill inner plate 207 and the front wall plate 209 of the vehicle body 200. Figure 5 , Figure 5Schematic diagram of front-end cutting, the upper end of the accommodating cavity 111 can be cut by cutting the front upper lap boundary 211 between the front wall panel 209 and the front wall lower cross beam assembly 210 of the vehicle body 200. Figure 6 , Figure 6 It is a schematic diagram of the rear end cutting. The upper end of the accommodating cavity 111 can be cut specifically by cutting at the rear upper overlapping boundary 214 near the overlapping position of the rear floor panel 212 of the vehicle body 200 and the front cross beam assembly 213 under the rear floor.

[0060] The vehicle body 200 is cut along the edge of the accommodating cavity 111 to obtain Figures 2 to 6 The cutting path shown is used to obtain a battery cover 110 structure with a minimum volume, so that the battery cover 110 structure is connected to the tray-type battery assembly 120 to obtain a lighter integrated structure battery pack 100, and the energy density of the integrated structure battery pack 100 is higher.

[0061] See also Figure 2 , Figure 3 and Figure 6 According to some embodiments of the present application, optionally, the battery cover 110 is formed by cutting the vehicle body 200 in the Z direction along the edge of the tray-type battery assembly 120 , wherein the Z direction is consistent with the installation direction of the tray-type battery assembly 120 to the battery cover 110 .

[0062] like Figure 6 As shown, the tray-type battery assembly 120 and the battery cover 110 (in the Figure 6 The installation direction of the remaining rear floor panel 212 is the up-down direction. At this time, the car body 200 is cut in the up-down direction. During the cutting process, there is no need to adjust the inclination angle between the cutting device and the car body 200. The car body 200 can be directly placed on the cutting platform and the cutting device can be controlled to cut from top to bottom, which is convenient for cutting. Figure 6 In the illustrated embodiment, the Z-direction cutting does not increase the volume of the battery cover 110 .

[0063] In some embodiments, the entire battery cover 110 is formed by cutting the vehicle body 200 in the Z direction using the edge of the tray-type battery assembly 120. A simpler cutting path is selected to save the preparation time of the battery cover 110. At this time, the battery cover 110 may not be of the smallest volume, and the energy density of the obtained integrated structure battery pack 100 may be relatively low but can pass the announcement test.

[0064] See also Figures 2 to 6According to some embodiments of the present application, optionally, step S21: cutting the vehicle body 200 for connecting the tray-type battery assembly 120 to obtain the battery cover 110 includes the following steps: S211: cutting the vehicle body 200 along the edge of the accommodating cavity 111 to form the first end of the battery cover 110; S212: cutting the vehicle body 200 in the Z direction along the edge of the tray-type battery assembly 120 to form the second end of the battery cover 110. Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the lightweight vehicle body. Figure 3 Reason Figure 2 A schematic diagram of the structure of the battery cover 110 formed by cutting. Figure 6 , the Z direction is consistent with the installation direction of the tray-type battery assembly 120 to the battery cover 110. And the connection direction from the first end to the second end is along the front-to-back direction of the vehicle body 200, the first end of the battery cover 110 corresponds to the front end, and the second end corresponds to the rear end, wherein the front end and the rear end are as shown in FIG. Figure 2 and Figure 3 As shown, the front end and the rear end correspond to the front and back of the new energy vehicle after assembly.

[0065] The battery cover 110 is formed by cutting the vehicle body 200 along the edge of the accommodating cavity 111 and is combined with the vehicle body 200 being cut in the Z direction along the edge of the tray-type battery assembly 120. The front end of the battery cover 110 is cut in the Z direction, which may cause the accommodating cavity 111 to be unsealed or the volume of the battery cover 110 to be large. Therefore, the front end of the battery cover 110 is cut along the edge of the accommodating cavity 111 to form the vehicle body 200, so that the volume of the battery cover 110 is as small as possible. There is no risk of overcutting the rear end of the battery cover 110, which may cause the accommodating cavity 111 to be unsealed or the volume of the battery cover 110 to be large. Therefore, Z-direction cutting is selected to obtain higher processing efficiency.

[0066] See also Figure 7 According to some embodiments of the present application, optionally, the integrated battery pack announcement test method also includes the steps of: S1: sealing the body 200 retained by the battery cover 110; specifically, including S11: applying sealant to the surface of the battery cover 110; S12: sealing the leakage hole 205 of the body 200 included in the battery cover 110.

[0067] It is understandable that step S1 only needs to be before the integrated experimental report announcement test, and it can be after step S2 or before step S2. Preferably, step S1 is before step S2, so as to facilitate the use of the painting equipment in the mass production process of the vehicle body 200.

[0068] The vehicle body 200 needs to undergo a complete coating process. In step S12, the plugging cover assembly process of the leakage hole 205 of the vehicle body 200 is completed, that is, the leakage hole 205 is sealed with the plugging cover. As the main sealing method of the vehicle body 200, it needs to be consistent with the mass-produced vehicle body 200. Because the announcement test requires strict vibration and fire tests, etc., to ensure the consistency of the installation, the sealing of the vehicle body 200 can be verified in the announcement experiment of the power test.

[0069] In step S11, sealant is also applied to the surface of the vehicle body 200. Preferably, the sealant can be PVC (polyvinyl chloride) glue. As the main sealing method of the vehicle body 200, the sealant needs to be consistent with the mass-produced vehicle body 200. Because the announcement test requires strict vibration and fire tests, etc., to ensure the consistency of the installation, the sealing of the vehicle body 200 can be verified in the announcement experiment of the power test.

[0070] In such Figure 7 In the test method for the integrated structure battery pack announcement shown, on the one hand, the integrated structure battery pack 100 is obtained by using the battery cover 110 with extreme cutting and matching the tray-type battery assembly 120, and at the same time removing the redundant structural parts on the vehicle body 200 except for the seal, so that the battery cover 110 reaches the lightest theoretical weight. On the other hand, the parts of the integrated structure battery pack 100 are sealed by PVC glue and plugging covers, which are completely consistent with the sealing structure of the vehicle body. In the subsequent battery pack vibration test, in addition to verifying the structure of the tray-type battery assembly 120, the structural durability verification test of the vehicle body 200 parts and the sealing structure can be carried out at the same time, reducing the durability and sealing risks of the subsequent mass-produced vehicle.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A test method for an integrated structure battery pack, characterized in that: The following steps are involved: Obtaining an integrated structural battery pack including a portion of a vehicle body and integrated with a tray-type battery assembly; Conducting a public announcement test on the integrated structure battery pack; Wherein, the integrated structure battery pack comprises a battery cover having a receiving cavity, and the tray-type battery assembly received in the receiving cavity and connected to the battery cover; The steps of obtaining an integrated structural battery pack including a part of a vehicle body and integrated with a tray-type battery assembly include the following steps: Cutting the vehicle body for connecting the tray-type battery assembly to obtain the battery upper cover; Connecting the battery upper cover to the tray-type battery assembly to obtain an integrated structural battery pack; The vehicle body is provided with the accommodation cavity, and the accommodation cavity is used to install the tray-type battery assembly; The step of cutting the vehicle body for connecting the tray-type battery assembly to obtain the battery cover comprises: Cutting the vehicle body along the edge of the accommodating cavity to form a first end of the battery cover; The vehicle body is cut in the Z direction along the edge of the tray-type battery assembly to form the second end of the battery cover, wherein the Z direction is consistent with the installation direction of the tray-type battery assembly to the battery cover, and the connection direction from the first end to the second end is along the front-to-back direction of the vehicle body.

2. The integrated structure battery pack announcement test method according to claim 1, characterized in that: The battery upper cover retains the mounting portion of the vehicle body connected to the tray-type battery assembly.

3. The integrated structure battery pack announcement test method according to claim 1, characterized in that: The battery upper cover is sealed and connected to the tray-type battery assembly.

4. The integrated structure battery pack announcement test method according to claim 1, characterized in that: Before the integrated structure battery pack is subjected to the announcement test, the steps are also included: The vehicle body retained by the battery upper cover is sealed.

5. The integrated structure battery pack announcement test method according to claim 4, characterized in that: The vehicle body retained by the battery cover is sealed, comprising the following steps: Applying sealant to the surface of the battery upper cover; The leakage hole of the vehicle body retained by the battery upper cover is sealed.

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