Battery pack maintenance structure and vehicle

Abstract

The utility model discloses a battery pack maintenance structure and a vehicle. The battery pack maintenance structure comprises a battery upper cover, a maintenance port cover plate and a reinforcing ring, an annular boss is arranged on the battery upper cover, a battery access hole is formed in the annular boss, the reinforcing ring is arranged on the lower side of the annular boss, and the access hole cover plate detachably covers the upper side of the annular boss. The vehicle comprises a battery box body and the battery pack overhauling structure, the battery box body is arranged on the lower side of the battery upper cover, and the battery overhauling opening is located above the battery pack controller unit mounting cavity in the battery box body. According to the utility model, the troubleshooting and maintenance efficiency can be greatly improved, the sealing performance is good, the structural strength is high, and the structural light weight is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy vehicles, concretely relates to a battery pack overhauling structure and vehicle. BACKGROUND

[0002] With the development of new energy vehicles, the market share of new energy vehicles is rising year by year, and as the key component of new energy vehicles, reducing the battery pack failure rate and improving the battery pack maintenance efficiency have become the focus of various vehicle enterprises. According to the current market new energy vehicle after-sales problem feedback: there is a certain probability of after-sales replacement of battery pack internal BMS, BDU, relay, fuse and other components, so a structure capable of troubleshooting and maintenance of battery pack internal components needs to be set.

[0003] Most of the battery packs of new energy vehicles on the market do not have a battery pack maintenance structure, and troubleshooting and maintenance need to remove the battery pack from the whole vehicle and then remove the battery pack shell. For CTV vehicles (CTV means Cell-To-Vehicle, which means integrating battery cells directly into vehicle structures to improve the energy density of electric vehicles and reduce costs), if the battery pack is removed, the whole vehicle seat, carpet and floor wiring need to be removed, the troubleshooting and maintenance efficiency is very low, and the maintenance cost is also high. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model aims to provide a battery pack maintenance structure and vehicle, which can greatly improve the efficiency of troubleshooting and maintenance, has good sealing performance, high structural strength, and is beneficial to lightweight structure.

[0005] The battery pack maintenance structure in the utility model comprises a battery upper cover, an overhauling port cover plate and a reinforcing ring, an annular boss is arranged on the battery upper cover, a battery overhauling port is arranged on the annular boss, the reinforcing ring is arranged on the lower side of the annular boss, and the overhauling port cover plate is detachably covered on the upper side of the annular boss.

[0006] Further, a plurality of pull rivet nuts are arranged, the plurality of pull rivet nuts are all penetrated through the annular boss and riveted on the reinforcing ring, the overhauling port cover plate is connected with the plurality of pull rivet nuts through a plurality of bolts, and the overhauling port cover plate is detachably covered on the upper side of the annular boss.

[0007] Further, the pull rivet nut comprises a riveting head, a riveting part and a connecting part arranged in sequence from top to bottom, a plurality of riveting holes are arranged on the reinforcing ring in a circumferential direction, the riveting head abuts against the upper end surface of the reinforcing ring, the riveting part is riveted with the riveting hole, the inside of the riveting head and the riveting part are provided with bolt through holes, the inside of the connecting part is provided with a threaded hole, and the lower end of the connecting part is closed.

[0008] Further, the annular boss is provided with a clearance hole corresponding to the position of each riveting hole, and the clearance hole has a hole diameter greater than the outer diameter of the riveting head.

[0009] Further, one side of the head of the bolt facing the access cover plate is provided with a sealing coating.

[0010] Further, an annular sealing rubber strip is further arranged between the access cover plate and the battery upper cover.

[0011] Further, the material of the annular sealing rubber strip is silica gel foam.

[0012] Further, a first reinforcing boss protruding upward is arranged on the middle part of the access cover plate corresponding to the position of the battery access, and a second reinforcing boss protruding upward is arranged on the first reinforcing boss.

[0013] The utility model discloses a kind of vehicles, including battery box and above-mentioned battery pack maintenance structure, the battery box is set to the downside of the battery upper cover, the battery access is located in the upper of battery pack controller unit installation cavity in the battery box.

[0014] Further, a rear floor seat pan assembly is further included, and the rear floor seat pan assembly is arranged on the upper side of the battery upper cover.

[0015] The utility model has the advantages of:

[0016] (1) the utility model discloses by removing access cover plate, battery access can be exposed, so that the internal BMS of battery pack, BDU, relay, fuse and other components can be troubleshooting and maintenance, without removing battery pack from whole vehicle then removing battery pack shell, the efficiency of troubleshooting and maintenance is greatly improved, applicable to various vehicle types, especially suitable for CTV vehicle type. The utility model discloses by covering access cover plate on annular boss, battery access can be closed, guarantee the sealing performance of battery pack.

[0017] (2) The annular boss and the reinforcing ring can enhance the strength of the battery maintenance opening in the circumferential direction, ensure that sufficient supporting strength is provided for the maintenance opening cover plate, have high structural strength, and prevent the battery maintenance opening from deforming around the periphery to cause a leakage gap between the maintenance opening cover plate and the battery upper cover. Meanwhile, due to the arrangement of the annular boss and the reinforcing ring, the wall thickness of the battery upper cover is reduced, which is beneficial to structural lightweighting.

[0018] (3) The sealing coating between the head of the bolt and the maintenance opening cover plate ensures the sealing performance between the head of the bolt and the maintenance opening cover plate, prevents the gas in the battery pack from leaking from the position where the bolt and the maintenance opening cover plate are matched, the annular sealing rubber strip can ensure the sealing performance between the maintenance opening cover plate and the battery upper cover, and prevents the gas in the battery pack from leaking from the position where the maintenance opening cover plate and the battery upper cover are matched. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the purpose, technical scheme and beneficial effects of the utility model more clear, the utility model provides the following drawings for description:

[0020] Figure 1 It is an exploded view of the battery pack maintenance structure of the utility model;

[0021] Figure 2 It is a top view of the battery pack maintenance structure of the utility model;

[0022] Figure 3 It is a sectional view of the rivet nut accessory of the battery pack maintenance structure of the utility model;

[0023] Figure 4 It is a structural schematic view of the battery upper cover of the utility model;

[0024] Figure 5 It is a structural schematic view of the battery upper cover, the reinforcing ring and the rivet nut connection of the utility model;

[0025] Figure 6 It is a structural schematic view of the battery pack maintenance structure, the battery box body and the rear floor seat basin assembly connection of the utility model.

[0026] The marks in the drawings are as follows:

[0027] 1-battery upper cover, 101-annular boss, 102-battery maintenance opening, 103-allowance hole;

[0028] 2-maintenance opening cover plate, 201-first reinforcing boss, 202-second reinforcing boss;

[0029] 3-reinforcing ring, 301-riveting hole;

[0030] 4-Rivet nut, 401-Rivet joint, 402-Rivet part, 403-Connecting part, 404-Bolt through hole, 405-Threaded hole;

[0031] 5- Bolts;

[0032] 6- Annular sealing strip;

[0033] 7-Battery housing, 701-Battery pack controller unit mounting cavity;

[0034] 8-Rear floor basin assembly, 801-Surround basin access port. Detailed Implementation

[0035] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figures 1-5 As shown, a battery pack maintenance structure in this embodiment includes a battery top cover 1, a maintenance port cover 2, and a reinforcing ring 3. The battery top cover 1 is provided with an annular boss 101, and the annular boss 101 is provided with a battery maintenance port 102. The reinforcing ring 3 is provided on the lower side of the annular boss 101, and the maintenance port cover 2 is detachably attached to the upper side of the annular boss 101.

[0037] Removing the access cover 2 exposes the battery access port 102, allowing for troubleshooting and repair of components inside the battery pack, such as the BMS, BDU, relays, and fuses. This eliminates the need to remove the entire battery pack from the vehicle and dismantle its casing, significantly improving troubleshooting efficiency. This method is suitable for various vehicle models, especially CTV (Cell-To-Vehicle) vehicles, which integrate battery cells directly into the vehicle structure to improve energy density and reduce costs. Closing the access cover 2 onto the annular boss 101 seals the battery access port 102, ensuring the battery pack's airtightness.

[0038] Both the annular boss 101 and the reinforcing ring 3 enhance the circumferential strength of the battery access port 102, ensuring sufficient support strength for the access port cover 2. This high structural strength prevents leakage gaps between the access port cover 2 and the battery top cover 1 caused by peripheral deformation of the battery access port 102. Simultaneously, the annular boss 101 and the reinforcing ring 3 reduce the wall thickness of the battery top cover 1, contributing to a lighter structure.

[0039] The battery cover 1 and the reinforcing ring 3 can be connected by welding.

[0040] In the embodiment, a plurality of rivet nuts 4 are arranged on the reinforcing ring 3, and each of the rivet nuts 4 passes through the annular boss 101 and is riveted to the reinforcing ring 3; the access cover plate 2 is connected to each of the rivet nuts 4 through a plurality of bolts 5, and is capable of being detachably covered on the upper side of the annular boss 101. The rivet nuts 4 are arranged on the reinforcing ring 3 in a circumferential direction, and the number of the rivet nuts 4 can be 12 or 16. The number of the bolts 5 corresponds to the number of the rivet nuts 4. The access cover plate 2 is capable of being detachably covered on the upper side of the annular boss 101 through the connection of each of the bolts 5 and each of the rivet nuts 4. The threaded connection is convenient for disassembly and assembly, and the disassembly efficiency is high.

[0041] In the embodiment, the rivet nut 4 comprises, from top to bottom, a riveting head 401, a riveting portion 402, and a connecting portion 403. A plurality of riveting holes 301 are arranged on the reinforcing ring 3 in a circumferential direction. The riveting head 401 abuts against the upper end surface of the reinforcing ring 3. The riveting portion 402 is riveted to the riveting hole 301. The riveting head 401 and the riveting portion 402 are internally provided with bolt through holes 404. The connecting portion 403 is internally provided with a threaded hole 405, and the lower end of the connecting portion 403 is closed.

[0042] The closed lower end of the connecting portion 403 forms a blind hole structure of the bolt through hole 404 and the threaded hole 405 in the rivet nut 4, effectively preventing metal iron filings and electrophoretic paint powder generated by friction between the bolt 5 and the rivet nut 4 during assembly from falling into the inside of the battery pack.

[0043] In the embodiment, the annular boss 101 is provided with a clearance hole 103 corresponding to the position of each of the riveting holes 301. The clearance hole 103 has a hole diameter greater than the outer diameter of the riveting head 401. The clearance hole 103 is used to ensure that the rivet nut 4 can pass through, and prevent affecting the riveting of the rivet nut 4 and the reinforcing ring 3.

[0044] In the embodiment, the head of the bolt 5 is provided with a sealing coating on the side facing the access cover plate 2. The sealing coating can be a sealing glue coating. After the bolt 5 is screwed with the rivet nut 4, the head of the bolt 5 is tightly attached to the access cover plate 2. The sealing coating between the head of the bolt 5 and the access cover plate 2 ensures the sealing performance between the head of the bolt 5 and the access cover plate 2, and prevents the gas in the battery pack from leaking from the position where the bolt 5 and the access cover plate 2 are matched.

[0045] In this embodiment, an annular sealing strip 6 is also included, disposed between the access cover 2 and the battery cover 1. In this embodiment, the annular sealing strip 6 is made of silicone foam. After the bolt 5 and rivet nut 4 are tightened, the access cover 2 and the battery cover 1 compress the annular sealing strip 6, causing it to deform. The annular sealing strip 6 ensures the sealing performance between the access cover 2 and the battery cover 1, preventing gas inside the battery pack from leaking from the mating point between the access cover 2 and the battery cover 1.

[0046] In this embodiment, a first reinforcing boss 201 protruding upwards is provided at the center of the inspection port cover 2, corresponding to the position of the battery inspection port 102. A second reinforcing boss 202 protruding upwards is provided on the first reinforcing boss 201. The shape of the first reinforcing boss 201 can be the same as or similar to the shape of the battery inspection port 102, and the shape of the second reinforcing boss 202 can be a fishbone shape or other crisscrossing shapes. The combined shape of the first and second reinforcing bosses increases the strength of the inspection port cover 2, preventing deformation.

[0047] In summary, the structural strength of the battery pack maintenance structure is increased by the annular boss 101, the reinforcing ring 3, the first reinforcing boss 201, and the second reinforcing boss 202. The sealing coating on the head of the bolt 5, the annular sealing strip 6, and the bottom-sealed rivet nut 4 are used to improve the sealing performance at each position, thereby ensuring that the battery pack maintenance structure in this embodiment still has good sealing performance even when the battery pack thermal spray pressure reaches 15 kPa.

[0048] One type of vehicle in this embodiment, such as Figure 6 As shown, the battery box 7 and the aforementioned battery pack maintenance structure are included. The battery box 7 is located on the lower side of the battery cover 1, and the battery maintenance port 102 is located above the battery pack controller unit mounting cavity 701 inside the battery box 7.

[0049] In this embodiment, a rear floor seat assembly 8 is also included. The rear floor seat assembly 8 is disposed on the upper side of the battery cover 1. A seat inspection port 801 can be provided on the rear floor seat assembly 8. When the battery pack is inspected, the battery pack can be inspected directly from the rear seat position in the vehicle without disassembling the battery pack, effectively avoiding the problem of removing interior and exterior trim, wiring harnesses and other parts during the battery inspection process.

[0050] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.

Claims

1. A battery pack servicing structure, characterized by: The battery cover (1), the access cover plate (2) and the reinforcing ring (3) are included. The annular boss (101) is arranged on the battery cover (1), the battery access (102) is arranged on the annular boss (101), the reinforcing ring (3) is arranged on the lower side of the annular boss (101), and the access cover plate (2) is detachably covered on the upper side of the annular boss (101).

2. The battery pack servicing structure of claim 1, wherein: A plurality of pull rivet nuts (4) are also included, and the plurality of pull rivet nuts (4) are all through the annular boss (101) and riveted on the reinforcing ring (3). The access cover plate (2) is connected with the plurality of pull rivet nuts (4) through a plurality of bolts (5), and the access cover plate (2) is detachably covered on the upper side of the annular boss (101).

3. The battery pack servicing structure of claim 2, wherein: The pull rivet nut (4) includes a riveting head (401), a riveting part (402) and a connecting part (403) arranged in sequence from top to bottom. A plurality of riveting holes (301) are arranged on the reinforcing ring (3) in a circumferential direction. The riveting head (401) abuts against the upper end surface of the reinforcing ring (3), the riveting part (402) is riveted with the riveting hole (301), and the interiors of the riveting head (401) and the riveting part (402) are both provided with bolt through holes (404). The interior of the connecting part (403) is provided with a threaded hole (405), and the lower end of the connecting part (403) is closed.

4. The battery pack servicing structure of claim 3, wherein: The annular boss (101) is respectively provided with a clearance hole (103) corresponding to the position of each riveting hole (301), and the hole diameter of the clearance hole (103) is greater than the outer diameter of the riveting head (401).

5. The battery pack servicing structure of claim 2, wherein: The head of the bolt (5) is provided with a sealing coating on the side facing the access cover plate (2).

6. The battery pack servicing structure of claim 1, wherein: An annular sealing rubber strip (6) is further arranged between the access cover plate (2) and the battery cover (1).

7. The battery pack servicing structure of claim 6, wherein: The material of the annular sealing rubber strip (6) is silica gel foam.

8. The battery pack servicing structure of claim 1, wherein: The middle part of the access cover plate (2) is provided with an upwardly protruding first reinforcing boss (201) corresponding to the position of the battery access (102), and the first reinforcing boss (201) is provided with an upwardly protruding second reinforcing boss (202).

9. A vehicle characterized by: The battery box (7) and the battery pack access structure according to any one of claims 1-8 are included. The battery box (7) is arranged on the lower side of the battery cover (1), and the battery access (102) is located above the battery pack controller unit mounting cavity (701) in the battery box (7).

10. The vehicle of claim 9, characterized in that: A rear floor seat pan assembly (8) is further included, and the rear floor seat pan assembly (8) is arranged on the upper side of the battery cover (1).

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