Power battery structure for bottom maintenance

Abstract

The utility model provides a bottom maintenance power battery structure which comprises an integrated box body, a battery cell, a BDU body and an integrated maintenance cover, and the bottom of the integrated box body is provided with a first mounting hole; the battery cell and the BDU body are both arranged on the integrated box body, and the BDU body is located on one side of the battery cell; the integrated access cover penetrates through the first mounting hole and is detachably connected with the integrated box body, the integrated access cover comprises a BDU protection cover, the BDU body is located on the inner side of the BDU protection cover, and a suspension gap is formed between the BDU body and the BDU protection cover. The BDU body is installed in the integrated box body in an inverted buckling mode, specifically, when the BDU body is maintained, only a vehicle body needs to be lifted, the integrated access cover needs to be detached from the bottom, the BDU protection cover is made to be separated from the BDU body, the BDU body can be maintained, the integrated box body does not need to be detached in the maintenance process, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery structure technical field especially relates to a bottom overhaul's power battery structure. BACKGROUND

[0002] Power battery is the core component of electric vehicle, hybrid electric vehicle and other new energy vehicles, and its structure and technical background are crucial for improving battery performance, prolonging service life and improving safety. Lithium ion battery is the most commonly used power battery type, which has high energy density and long cycle life. The structure of the power battery includes battery cell, module and battery pack.

[0003] When the internal parts of the BDU or the BDU in the current power battery pack structure fails, the battery pack needs to be removed from the vehicle, and then the battery box cover is opened for maintenance or replacement of the BDU parts. This requires high equipment and long maintenance time, and high cost.

[0004] The invention with publication number CN111653701A proposes a power battery system including a tray, a heat-conducting structure glue, a BDU module, a foaming glue, a battery cell, a double-component structure glue and a top cover. The inner bottom wall of the tray is formed with a rib, the BDU module is installed in the tray and is spaced apart from the battery cell by the rib, the battery cells are connected together by the double-component structure glue to form a battery module, and the battery module is tightly connected to the tray by coating the heat-conducting structure glue on the inner bottom wall of the tray. However, the BDU of the above-mentioned power battery structure still adopts the installation method from top to bottom, so that when the BDU needs to be maintained, the power battery still needs to be removed for maintenance, which causes high equipment cost and long maintenance time. Therefore, the present application proposes a bottom maintenance power battery structure to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a bottom maintenance power battery structure, which installs the BDU body in the inside of the integrated box body in the form of reverse buckling, and shields and protects the BDU body by setting the BDU protection cover. When the BDU body is maintained, only the vehicle body needs to be lifted, the integrated maintenance cover is removed from the bottom, the BDU protection cover is separated from the BDU body, and the BDU body can be maintained. The BDU body is connected to the integrated box body in the form of reverse buckling, which is convenient for maintaining and processing the BDU body from the bottom, and the integrated box body does not need to be removed during maintenance, which is convenient to use.

[0006] The technical scheme of the utility model is as follows: the utility model provides a bottom maintenance power battery structure, which comprises an integrated box body, a battery cell, a BDU body and an integrated maintenance cover, wherein,

[0007] The bottom of the integrated box is provided with a first mounting hole;

[0008] The electric core and the BDU body are arranged on the integrated box, and the BDU body is located on one side of the electric core.

[0009] The integrated maintenance cover is detachably connected through the first mounting hole and the integrated box, and the integrated maintenance cover comprises a BDU protection cover, the BDU body is located on the inner side of the BDU protection cover, and the BDU body and the BDU protection cover form a suspended gap.

[0010] On the basis of the above technical scheme, preferably, further comprising a fastener, wherein,

[0011] The integrated maintenance cover further comprises a mounting plate fixedly connected with the BDU protection cover, the mounting plate is located at the bottom of the integrated box, and is used for limiting upward movement of the integrated maintenance cover.

[0012] The fastener is detachably connected with the mounting plate and the integrated box.

[0013] On the basis of the above technical scheme, preferably, the fastener is a bolt, and a bolt hole is formed in the mounting plate, and the fastener is threadedly connected with the integrated box through the bolt hole.

[0014] On the basis of the above technical scheme, preferably, a grid hole is formed in the outer side of the BDU protection cover.

[0015] On the basis of the above technical scheme, preferably, the BDU body is detachably connected with the integrated box through a BDU adapter support, and the BDU body is electrically connected with the electric core through a copper bar, and the copper bar is a soft copper bar.

[0016] On the basis of the above technical scheme, preferably, the copper bar is connected below the BDU adapter support, and a position-avoiding hole is formed in the BDU protection cover for the copper bar to pass through.

[0017] On the basis of the above technical scheme, preferably, further comprising a bottom guard plate and a liquid cooling plate, wherein,

[0018] The bottom guard plate and the liquid cooling plate are arranged at the bottom of the integrated box, the bottom guard plate is located below the liquid cooling plate, the mounting plate is located on the side of the bottom guard plate away from the liquid cooling plate, the bottom guard plate and the liquid cooling plate are matched with the shape of the bottom of the integrated box, and second mounting holes are formed in the bottom guard plate and the liquid cooling plate for the BDU protection cover to pass through, and the fastener is threadedly connected with the integrated box through the bottom guard plate and the liquid cooling plate.

[0019] On the basis of the above technical scheme, preferably, it further comprises two sealing rings, wherein,

[0020] One of the sealing rings is bonded between the bottom guard plate and the liquid cooling plate, and the other sealing ring is bonded between the liquid cooling plate and the integrated box body, and the second mounting hole is located on the inner side of the sealing ring.

[0021] On the basis of the above technical scheme, preferably, it further comprises a partition plate, wherein,

[0022] The partition plate is arranged inside the integrated box body and divides the inner cavity of the integrated box body into a first mounting cavity and a second mounting cavity, the battery cell is arranged inside the first mounting cavity, and the BDU body is arranged inside the second mounting cavity.

[0023] On the basis of the above technical scheme, preferably, it further comprises a high-voltage plug-in, wherein,

[0024] The high-voltage plug-in is arranged on the integrated box body, and the copper bar is electrically connected with the high-voltage plug-in.

[0025] The bottom maintenance power battery structure of the utility model has the following beneficial effects relative to the prior art:

[0026] (1) The BDU body is installed in the integrated box body in a reverse buckling manner, and the BDU protection cover is arranged, so as to facilitate shielding and protection of the BDU body. When the BDU body is maintained, only the vehicle body needs to be lifted, the integrated maintenance cover is detached from the bottom, the BDU protection cover is separated from the BDU body, and the BDU body can be maintained. The BDU body is connected to the integrated box body in a reverse buckling manner, which facilitates maintenance and treatment of the BDU body from below, and the integrated box body does not need to be detached during maintenance, which is convenient to use.

[0027] (2) The liquid cooling plate and the bottom guard plate are arranged at the bottom of the integrated box body, the liquid cooling plate can cool the bottom of the battery cell through the integrated box body during use, and the bottom guard plate arranged below the liquid cooling plate can shield and protect the liquid cooling plate. Sealing rings are arranged between the bottom guard plate and the liquid cooling plate and between the liquid cooling plate and the integrated box body, which can prevent external substances from entering the BDU body from below and increase the operation stability of the BDU body. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0029] Figure 1 The bottom maintenance power battery structure connection box cover after the state diagram of the present application;

[0030] Figure 2 The bottom maintenance power battery structure of the present application is a three-dimensional view;

[0031] Figure 3 The bottom maintenance power battery structure of the present application is a Figure 2 The enlarged schematic view of A shown in the figure;

[0032] Figure 4 The bottom maintenance power battery structure of the present application is a bottom view;

[0033] Figure 5 The bottom maintenance power battery structure of the present application is a state diagram after the cell is removed;

[0034] Figure 6 The bottom maintenance power battery structure of the present application is a Figure 5 The explosion view of the structure shown in the figure;

[0035] Figure 7 The bottom maintenance power battery structure of the present application is a connection mode diagram of BDU body and integrated maintenance cover;

[0036] Figure 8 The bottom maintenance power battery structure of the present application is a three-dimensional view of the structure at BDU body;

[0037] Figure 9 The bottom maintenance power battery structure of the present application is a three-dimensional view of the integrated maintenance cover;

[0038] Figure 10 The bottom maintenance power battery structure of the present application is a bottom view of BDU body. Specific implementation

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0040] As shown in Figures 1-10 The bottom maintenance power battery structure of the present application has the characteristics that it comprises an integrated box 11, an electric core 12, a BDU body 21 and an integrated maintenance cover 3. The bottom of the integrated box 11 is provided with a first mounting hole 111. The electric core 12 and the BDU body 21 are arranged on the integrated box 11, and the BDU body 21 is located on one side of the electric core 12. The integrated maintenance cover 3 penetrates through the first mounting hole 111 and is detachably connected with the integrated box 11. The integrated maintenance cover 3 comprises a BDU protection cover 32. The BDU body 21 is located on the inner side of the BDU protection cover 32 and forms a suspended gap with the BDU protection cover 32.

[0041] The BDU body 21 has a connecting head, and the connecting head is located below the BDU body 21, that is, the BDU body 21 is installed in the box in a reverse manner.

[0042] The BDU body 21 and the BDU protection cover 32 form a suspended gap, which means that the BDU body 21 is suspendedly installed in the BDU protection cover 32. This design is used to reduce the influence of external vibration on the BDU body 21 and facilitate the installation and processing of the BDU body 21.

[0043] In the specific implementation, the BDU body 21 is installed on the integrated box 11 in a top-to-bottom manner, and the integrated maintenance cover 3 is detachably connected below the BDU body 21. The BDU body 21 is installed in the integrated box 11 in a reverse manner, and the BDU protection cover 32 is arranged to shield and protect the BDU body 21. When the BDU body 21 is maintained, the vehicle body is only lifted, and the integrated maintenance cover 3 is detached from the bottom, so that the BDU protection cover 32 is separated from the BDU body 21. The BDU body 21 can be maintained. The BDU body 21 is connected to the integrated box 11 in a reverse manner, which facilitates the maintenance and processing of the BDU body 21 from the bottom, and the integrated box 11 does not need to be detached during the maintenance process, which is convenient to use.

[0044] Preferably, the top of the integrated box 11 is detachably connected with a box cover 13 for covering the integrated box 11.

[0045] As a preferred implementation, the fastener 4 is further included, wherein the integrated access cover 3 further comprises a mounting plate 31 fixedly connected with the BDU protection cover 32, the mounting plate 31 is located at the bottom of the integrated box 11, and is used to limit the upward movement of the integrated access cover 3; the fastener 4 is detachably connected with the mounting plate 31 and the integrated box 11.

[0046] In specific implementation, the BDU protection cover 32 is passed through the first mounting hole 111, and the mounting plate 31 is abutted against the lower side of the integrated box 11, and then the fastener 4 is used to connect the mounting plate 31 and the integrated box 11, so as to complete the fixed connection of the integrated access cover 3.

[0047] As a preferred implementation, the fastener 4 is a bolt, and a bolt hole 311 is formed in the mounting plate 31, and the fastener 4 is screwed with the integrated box 11 through the bolt hole 311.

[0048] In specific implementation, the fastener 4 is screwed with the integrated box 11 through the bolt hole 311, so as to complete the connection of the integrated access cover 3.

[0049] As a preferred implementation, the outer side of the BDU protection cover 32 is provided with a grid hole 321.

[0050] In this way, the grid hole 321 is used for heat dissipation of the BDU body 21.

[0051] As a preferred implementation, the BDU body 21 is detachably connected with the integrated box 11 through the BDU adapter bracket 23, and the BDU body 21 is electrically connected with the battery cell 12 through the copper bar 22, and the copper bar 22 is a soft copper bar.

[0052] As a preferred implementation, the copper bar 22 is connected below the BDU adapter bracket 23, and the BDU protection cover 32 is provided with a clearance hole 322 for the copper bar 22 to pass through.

[0053] The copper bar 22 is connected below the BDU adapter bracket 23, so as to realize the reverse connection of the BDU body 21. The copper bar 22 is a soft copper bar, so that when the BDU body 21 needs to be further maintained, only the bolt connected with the BDU body 21 needs to be disassembled, and the copper bar 22 can be bent to a certain angle, which is convenient to use.

[0054] As a preferred embodiment, the bottom guard plate 51 and the liquid cooling plate 52 are further included, wherein the bottom guard plate 51 and the liquid cooling plate 52 are arranged at the bottom of the integrated box 11, the bottom guard plate 51 is below the liquid cooling plate 52, the mounting plate 31 is arranged on the side of the bottom guard plate 51 away from the liquid cooling plate 52, the bottom guard plate 51 and the liquid cooling plate 52 are matched with the shape of the bottom of the integrated box 11, and the second mounting hole 53 for the BDU protection cover 32 to pass through is arranged on the bottom guard plate 51 and the liquid cooling plate 52, and the fastener 4 is screwed with the integrated box 11 through the bottom guard plate 51 and the liquid cooling plate 52.

[0055] In this way, the liquid cooling plate 52 can cool the bottom of the battery cell 12 through the integrated box 11 in use, and the bottom guard plate 51 can shield and protect the liquid cooling plate 52.

[0056] As a preferred embodiment, two sealing rings 6 are further included, wherein one of the sealing rings 6 is arranged between the bottom guard plate 51 and the liquid cooling plate 52, and the other sealing ring 6 is arranged between the liquid cooling plate 52 and the integrated box 11, and the second mounting hole 53 is arranged on the inner side of the sealing ring 6.

[0057] In this way, the connection of the bottom guard plate 51 and the liquid cooling plate 52 is simultaneously sealed by the sealing ring 6. The sealing ring 6 is arranged between the bottom guard plate 51 and the liquid cooling plate 52 and between the liquid cooling plate 52 and the integrated box 11, and the foreign matter is prevented from entering the BDU body 21 from below under the double action of the two sealing rings 6, thereby increasing the operation stability of the BDU body 21.

[0058] As a preferred embodiment, a partition plate 7 is further included, wherein the partition plate 7 is arranged in the integrated box 11 and divides the inner cavity of the integrated box 11 into a first mounting cavity 112 and a second mounting cavity 113, the battery cell 12 is arranged in the first mounting cavity 112, and the BDU body 21 is arranged in the second mounting cavity 113.

[0059] In this way, the partition plate 7 can shield and isolate the BDU body 21 and the battery cell 12 when the power battery structure is installed, and the BDU body 21 and the battery cell 12 are prevented from being in contact to cause heat loss and other problems.

[0060] As a preferred embodiment, a high-voltage plug-in part 8 is further included, wherein the high-voltage plug-in part 8 is arranged on the integrated box 11, and the copper bar 22 is electrically connected with the high-voltage plug-in part 8.

[0061] The high-voltage plug-in part 8 is used for connecting the BDU body 21 with external electrical devices.

[0062] The working principle of the utility model is introduced as follows:

[0063] Specifically, when assembling the battery pack structure of the application, the BDU body 21 is connected in a reverse buckling manner at the connection, and is fixedly connected with the integrated box 11 through the BDU adapter bracket 23, and then the BDU body 21 is electrically connected with the battery cell 12 and the high-voltage plug-in 8 through the connecting copper bar 22, so as to complete the connection treatment of the BDU body 21. After connection, the BDU protective cover 32 is inserted into the second mounting hole 53 and the first mounting hole 111, and the mounting plate 31 is connected with the bottom guard plate 51 through the fastener 4, at this time the BDU body 21 is suspended in the inside of the BDU protective cover 32. In this way, when the BDU body 21 needs to be overhauled, only the vehicle body needs to be lifted and the integrated maintenance cover 3 is removed, so that the BDU body 21 can be preliminarily overhauled, if the BDU body 21 needs to be further overhauled, only the bolt connecting the copper bar 22 with the BDU body 21 needs to be removed, and the BDU body 21 is taken out from below after being opened at a certain angle for overhaul.

[0064] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bottom-accessible power cell structure, characterized by: Integrating box (11), battery cell (12), BDU body (21) and integrated maintenance cover (3), wherein, The bottom of the integrated box (11) is provided with a first mounting hole (111); The battery cell (12) and the BDU body (21) are arranged on the integrated box (11), and the BDU body (21) is located on one side of the battery cell (12); The integrated maintenance cover (3) passes through the first mounting hole (111) and is detachably connected with the integrated box (11), and the integrated maintenance cover (3) comprises a BDU protection cover (32), the BDU body (21) is located on the inner side of the BDU protection cover (32), and a suspended gap is formed between the BDU body (21) and the BDU protection cover (32).

2. The bottom-accessible power cell structure of claim 1, wherein: Further comprising a fastener (4), wherein, The integrated maintenance cover (3) further comprises a mounting plate (31) fixedly connected with the BDU protection cover (32), the mounting plate (31) is located at the bottom of the integrated box (11), and is used for limiting upward movement of the integrated maintenance cover (3); The fastener (4) is detachably connected with the mounting plate (31) and the integrated box (11).

3. The bottom-accessible power cell structure of claim 2, wherein: The fastener (4) is a bolt, and a bolt hole (311) is formed in the mounting plate (31), and the fastener (4) is threadedly connected with the integrated box (11) through the bolt hole (311).

4. The bottom-accessible power cell structure of claim 1, wherein: The outer side of the BDU protection cover (32) is provided with a grid hole (321).

5. The bottom-accessible power cell structure of claim 1, wherein: The BDU body (21) is detachably connected with the integrated box (11) through a BDU adapter support (23), and the BDU body (21) is electrically connected with the battery cell (12) through a copper bar (22), and the copper bar (22) is a soft copper bar.

6. The bottom-accessible power cell structure of claim 5, wherein: The copper bar (22) is connected below the BDU adapter support (23), and the BDU protection cover (32) is provided with a position avoiding hole (322) for the copper bar (22) to pass through.

7. The bottom-accessible power cell structure of claim 3, wherein: Further comprising a bottom guard plate (51) and a liquid cooling plate (52), wherein, The bottom guard plate (51) and the liquid cooling plate (52) are arranged at the bottom of the integrated box (11), the bottom guard plate (51) is located below the liquid cooling plate (52), the mounting plate (31) is located on the side of the bottom guard plate (51) away from the liquid cooling plate (52), the bottom guard plate (51) and the liquid cooling plate (52) are matched with the shape of the bottom of the integrated box (11), and the second mounting hole (53) is formed in the bottom guard plate (51) and the liquid cooling plate (52) for the BDU protection cover (32) to pass through, and the fastener (4) is threadedly connected with the integrated box (11) through the bottom guard plate (51) and the liquid cooling plate (52).

8. The bottom-accessible power cell structure of claim 7, wherein: Further comprising two sealing rings (6), wherein, One of the sealing rings (6) is bonded between the bottom guard plate (51) and the liquid cooling plate (52), and the other sealing ring (6) is bonded between the liquid cooling plate (52) and the integrated box (11), and the second mounting hole (53) is located on the inner side of the sealing ring (6).

9. The bottom-accessible power cell structure of claim 1, wherein: Further comprising a partition plate (7), wherein, The partition plate (7) is arranged in the inside of the integrated box (11) and separates the inner cavity of the integrated box (11) into a first installation cavity (112) and a second installation cavity (113), the electric core (12) is installed in the inside of the first installation cavity (112), and the BDU body (21) is installed in the inside of the second installation cavity (113).

10. The bottom-accessible power cell structure of claim 5, wherein: Further comprising a high-voltage plug-in (8), wherein, The high-voltage plug-in (8) is arranged on the integrated box (11), and the copper bar (22) is electrically connected with the high-voltage plug-in (8).

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