CN218849678U - Lower box body of lithium ion battery - Google Patents

Abstract

The utility model provides a lithium-ion battery lower box body, which includes a base body, an installation frame, a lifting lug and a positioning mechanism; the base body is integrally formed; the base body is provided with an installation frame; and the opposite outer walls of the base body are each provided with at least one lifting lug ; A positioning mechanism is provided on the lifting lug. The utility model can be directly assembled with the installation frame through the setting of the integral molding of the base body, the structure is simple, and the assembly process is simple; through the mutual cooperation of the lifting lug and the positioning mechanism, when the battery pack is assembled with the chassis of the whole vehicle, it can be positioned through the positioning on the lifting lug. The mechanism and the installation point of the vehicle can quickly and accurately match, and then complete the installation and fixation of the battery pack and the vehicle, improving assembly efficiency.

Description

Lithium-ion battery lower box

technical field

The utility model relates to the field of power battery boxes, in particular to a lithium ion battery lower box.

Background technique

Lithium-ion batteries have the advantages of high energy density, long cycle life, light weight, and small size. They are not only widely used in portable electronic devices such as smartphones, digital cameras, and notebook computers, but also widely used in electric vehicles, electric bicycles, and power tools. Large and medium-sized electric equipment; the new energy storage and low-speed automobile industry continue to increase the degree of lithium electrification, and the energy storage industry such as 5g communication base stations and household energy storage continues to advance. Low-speed vehicles with configuration and low speed limit are also gradually appearing; with the rapid development of the new energy lithium battery industry, major car companies have an increasing demand for new energy vehicle battery boxes, and the size and shape of battery boxes for different models vary. same.

Lithium-ion power battery is one of the important components of electric vehicles. Faced with the cost pressure of automobile manufacturing, car companies put forward strict control requirements for the safety and weight of the entire battery pack. There are many redundant designs in the structure design of traditional lithium batteries. That is, bolts are still used to lock the box frame, and the battery box is heavy, the internal structure layout is unreasonable, the space utilization rate is low, there are problems such as complex production and assembly process, high production cost, and unfavorable mass production. In addition, the traditional lithium When the battery box is assembled into the car, it needs to constantly adjust its position to fit the car, which is time-consuming and labor-intensive.

Utility model content

The technical problem to be solved by the utility model is how to make a lithium-ion battery lower box that is not only simple in structure, but also convenient for positioning and installation.

The utility model realizes solving above-mentioned technical problem by following technical means:

A lithium-ion battery lower box, comprising a base (1), an installation frame (2), lifting lugs (3), and a positioning mechanism (4); the base (1) is integrally formed; the inside of the base (1) An installation frame (2) is provided; at least one lifting lug (3) is respectively disposed on opposite outer walls of the base body (1); and a positioning mechanism (4) is disposed on the lifting lug (3).

Beneficial effects: through the integrated formation of the base body, it can be directly assembled with the installation frame, the structure is simple, and the assembly process is simple; through the mutual cooperation of the lifting lug and the positioning mechanism, when the battery pack is assembled with the chassis of the whole vehicle, it can be positioned through the positioning on the lifting lug. The mechanism and the installation point of the vehicle can quickly and accurately match, and then complete the installation and fixation of the battery pack and the vehicle, improving assembly efficiency.

Further, two hanging lugs (3) are fixed at intervals on the opposite outer wall of the base body (1), and a positioning mechanism (4) is fixed on a pair of hanging lugs (3) arranged diagonally.

Further, the lifting lug (3) includes a lower casing (31), an upper casing (32), and a sleeve (33), and the upper casing (32) is clamped on the lower casing (31), so that There is a gap between the top wall of the upper casing (32) and the top wall of the lower casing (31), and at least one sleeve (33) is fixed in the gap, and the sleeve (33) is hollow. The upper casing (32) above the sleeve (33) and the lower casing (31) below are arranged through.

Beneficial effect: through the setting of the sleeve, not only can it play a supporting role, but also can be fixed to the chassis of the whole vehicle through the sleeve through the bolt.

Further, the vertical section of the lower casing (31) is in the shape of a "several", and the side of the lower casing (31) close to the base (1) integrally extends out of a mounting plate (311), and the mounting plate ( 311) is fixed to the bottom wall outside the base body (1); the vertical section of the upper casing (32) is in the shape of a "several", and the upper casing (32) is clamped on the lower casing (31) and passed through the side The walls are fixed to each other, and the side wall of the lower casing (31) close to the base body (1) is fixed to the outer side wall of the base body (1).

Further, two sleeves (33) are fixed side by side along the length direction in the gap, and a positioning mechanism (4) is arranged between the two sleeves (33).

Further, the positioning mechanism (4) is a positioning pin, the bottom end of the positioning pin is fixed on the top wall of the lower casing (31), and the top end of the positioning pin extends through the top wall of the upper casing (32) .

Further, the base (1) is provided with an opening at the top, a first reinforcing rib (11) is integrally fixed on the bottom wall of the base (1), and a flanging (12) is integrally fixed on the top of the side wall of the base (1). ), the side wall of the base body (1) is fixed with second reinforcing ribs (13) at intervals, and at least one plug-in hole (14) is opened on the side wall of the base body (1).

Beneficial effects: through the setting of the first reinforcing rib, the support rigidity of the bottom to the module can be strengthened; through the setting of the flange, the overall rigidity of the box body and the sealing safety performance of the box body can be improved; through the setting of the second reinforcing rib, The collision protection of the side wall of the lower box can be enhanced; the plug-in hole is opened on the base body, which is beneficial to the effective connection between the external plug-in and the high-voltage part inside the box and makes the position of the plug-in highly sealed.

Further, the base body (1) is integrally formed by DC04 low-carbon steel plate through die stamping, and the four corners of the base body (1) are punched with triangles.

Further, the installation frame (2) sequentially includes a left longitudinal beam (21), an upper beam (22), a right longitudinal beam (23), a lower beam (24), a middle beam (25), and a BDU installation beam (26) , BMS installation beam (27), the left longitudinal beam (21), the upper beam (22), the right longitudinal beam (23), the lower beam (24), and the middle beam (25) are arranged in sequence to form a "day" shape, so The BDU installation beam (26) and the BMS installation beam (27) are integrally fixed on the side of the lower beam (24) away from the middle beam (25); The inner side wall and bottom wall of (1) are fixed, the upper beam (22) is fixed to the upper end side wall of the base body (1), the lower beam (24) is fixed to the inner bottom wall of the base body (1), and the middle beam (25) is fixed on the bottom wall in the middle of the base body (1), and the BDU installation beam (26), BMS installation beam (27) is fixed to the lower end side wall of the base body (1).

Beneficial effects: through the setting of the installation frame structure, the module is embedded in the middle of the beam, and is fixed in the "day" sub-frame through the installation panels on the four sides of the module. The whole has the advantages of strong rigidity and high stability coefficient, effectively improving the battery The stability of the box.

Further, a plurality of liquid leakage grooves (29) are provided on each beam body of the installation frame (2) close to the internal modules.

Beneficial effects: the production efficiency of box body processing can be further improved through the arrangement of the liquid leakage tank.

The utility model has the advantages of:

The utility model can be directly assembled with the installation frame through the setting of the integral molding of the base body, the structure is simple, and the assembly process is simple; through the mutual cooperation of the lifting lug and the positioning mechanism, when the battery pack is assembled with the chassis of the whole vehicle, it can be positioned through the positioning on the lifting lug. The mechanism and the installation point of the vehicle can quickly and accurately match, and then complete the installation and fixation of the battery pack and the vehicle, improving assembly efficiency.

The utility model can not only play a supporting role through the arrangement of the sleeve, but also can pass through the sleeve and be fixed to the chassis of the whole vehicle by bolts.

The utility model can strengthen the support rigidity of the bottom to the module through the setting of the first reinforcing rib; through the setting of the flange, the overall rigidity of the box body and the sealing safety performance of the box body can be improved; through the setting of the second reinforcing rib, The collision protection of the side wall of the lower box can be enhanced; the plug-in hole is opened on the base body, which is beneficial to the effective connection between the external plug-in and the high-voltage part inside the box and makes the position of the plug-in highly sealed.

The utility model adopts the setting of the installation frame structure, the module is embedded in the middle of the beam, and the installation panels on the four sides of the module are fixed in the "day" sub-frame. The stability of the box.

The utility model can further improve the production efficiency of the box body processing through the arrangement of the liquid leakage tank.

Description of drawings

Fig. 1 is the perspective view of the lower casing of the lithium-ion battery of the utility model embodiment one;

Fig. 2 is a perspective view of the matrix in the lower case of the lithium-ion battery according to Embodiment 1 of the utility model;

Fig. 3 is a perspective view of the installation frame in the lower box of the lithium-ion battery according to Embodiment 1 of the utility model;

Fig. 4 is the first assembly drawing of the lifting lug and the positioning mechanism in the lower box of the lithium-ion battery according to Embodiment 1 of the present utility model;

Fig. 5 is a second assembly drawing of the lifting lug and the positioning mechanism in the lower case of the lithium-ion battery according to Embodiment 1 of the present utility model.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are Some embodiments of the utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment one

As shown in FIG. 1 , this embodiment provides a lower lithium-ion battery box, including a base 1 , an installation frame 2 , lifting lugs 3 , and a positioning mechanism 4 .

As shown in Figure 1, the installation frame 2 is fixed inside the base body 1, and at least one lifting lug 3 is fixed on each of the opposite outer walls of the base body 1. In this embodiment, two hanging lugs are fixed on each of the opposite outer walls of the base body 1 at intervals. Ears 3, a positioning mechanism 4 is fixed on a pair of lifting ears 3 arranged diagonally.

As shown in Figure 1 and Figure 2, the base body 1 is provided with an opening at the top, and a first reinforcing rib 11 is integrally fixed on the bottom wall of the base body 1, which is used to strengthen the support rigidity of the bottom to the module; the top of the side wall of the base body 1 is integrally fixed There is a flange 12, which is used to seal and cooperate with the upper case cover (not shown in the figure). The flange 12 is provided with mounting holes 121 in turn, and is used to seal and fix the upper case cover by installing a blind rivet nut. In addition, the flange 12 The setting can also improve the overall rigidity of the box body, thereby improving the sealing safety performance of the box body; second reinforcing ribs 13 are fixed at intervals on the side wall of the base body 1, which are used to enhance the collision protection of the side wall of the lower box body; one part of the base body 1 At least one plug-in hole 14 is opened on the side wall, and two plug-in holes 14 are arranged side by side on the side wall of the base 1 of the example of this embodiment, which are used to install the external electrical plug-in of the battery pack, which is beneficial to the external plug-in and the internal high-voltage parts of the box. The effective connection and the sealing of the plug-in position are high; the base 1 is integrally formed by DC04 low-carbon steel plate through die stamping, and the four corners of the base 1 are stamped with triangles, which is easy to form.

As shown in Figure 1 and Figure 3, the installation frame 2 sequentially includes a left longitudinal beam 21, an upper beam 22, a right longitudinal beam 23, a lower beam 24, a middle beam 25, a BDU installation beam 26, a BMS installation beam 27, a left longitudinal beam 21 , the upper beam 22, the right longitudinal beam 23, the lower beam 24, and the middle beam 25 are arranged in sequence to form a "day" shape. The module is embedded in the middle of the beam, and is fixed in the "day" sub-frame through the installation panels on the four sides of the module. The whole has the advantages of strong rigidity and high stability coefficient, which can effectively improve the stability of the battery box; The top of the body is fixed with a plurality of rivet nuts 28, and the rivet nuts 28 can cooperate with the bolts to be fixedly connected with the module installation panel (not shown); each beam body of the installation frame 2 is close to the internal module (not shown) A plurality of liquid leakage grooves 29 are arranged at each place, and the production efficiency of the box body processing can be further improved by setting the liquid leakage grooves 29 on the beam body;

As shown in Figures 1 and 3, the left longitudinal beam 21 and the right longitudinal beam 23 are respectively fixed to the inner side wall and the bottom wall of the base body 1 at equal intervals by resistance welding, the upper beam 22 is fixed to the upper end side wall of the base body 1, and the lower beam 24 It is fixed to the inner bottom wall of the base body 1, the middle beam 25 is fixed on the bottom wall in the middle of the base body 1, and the BDU installation beam 26 and the BMS installation beam 27 are fixed to the lower side wall of the base body 1.

As shown in Fig. 1, Fig. 4 and Fig. 5, the lifting lug 3 includes a lower shell 31, an upper shell 32, and a sleeve 33. The vertical section of the lower shell 31 is in the shape of "几", and the lower shell 31 is close to the base 1. The mounting plate 311 is integrally extended from one side of the base body 1. The mounting plate 311 is fixed to the bottom wall outside the base body 1. The vertical section of the upper shell 32 is in the shape of a "several" shape. The upper shell 32 is clamped on the lower shell 31 and passed through the side wall. Fix each other, the side wall of the lower shell 31 close to the base 1 is fixed with the outer wall of the base 1 by resistance welding and plug welding; a gap is provided between the top wall of the upper shell 32 and the top wall of the lower shell 31, and the gap is along the Two sleeves 33 are fixed side by side in the length direction, the sleeves 33 are hollow, the upper shell 32 above the sleeve 33 and the lower shell 31 below are set through, and the sleeve 33 introduced in the middle of the gap can not only play a supporting role , and can pass through the sleeve 33 and be fixed to the vehicle chassis by bolts;

As shown in Figure 4 and Figure 5, a positioning mechanism 4 is arranged between the two sleeves 33. The positioning mechanism 4 is a positioning pin in the example of this embodiment, and the bottom end of the positioning pin is fixed on the top wall of the lower housing 31, and the positioning pin penetrates The top wall of the upper case 32 protrudes. When the battery pack is assembled with the vehicle chassis, the positioning pin on the lifting lug 3 can be quickly and accurately matched with the installation point of the vehicle, thereby completing the bolt connection between the battery pack and the vehicle. Improve assembly efficiency.

When in use, install the module into the lower box, seal and fix the upper box cover and the lower box to form a battery pack, assemble the battery pack with the chassis of the whole vehicle, and connect the positioning pin on the lifting ear 3 with the installation point of the whole vehicle Accurate matching is quickly completed, and then the bolts are passed through each sleeve 33 to fix with the chassis of the whole vehicle to complete the fixing of the battery pack and the whole vehicle, and the assembly efficiency is high.

The above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing embodiments The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A lithium ion battery lower box, characterized in that it comprises a base (1), a mounting frame (2), lifting lugs (3), and a positioning mechanism (4); The base (1) is integrally formed; An installation frame (2) is arranged in the base body (1); At least one lifting lug (3) is provided on the opposite side outer wall of the base body (1); A positioning mechanism (4) is arranged on the lifting ear (3). 2. A lithium-ion battery lower box according to claim 1, characterized in that: two lifting lugs (3) are fixed at intervals on the outer wall on the opposite side of the base (1), and the diagonally arranged A positioning mechanism (4) is fixed on the pair of lifting lugs (3). 3. A lithium-ion battery lower case according to claim 1, characterized in that: the lifting lug (3) comprises a lower case (31), an upper case (32), and a sleeve (33), The upper casing (32) is clamped on the lower casing (31), a gap is provided between the top wall of the upper casing (32) and the top wall of the lower casing (31), and at least A sleeve (33), the sleeve (33) is hollow, the upper shell (32) above the sleeve (33) and the lower shell (31) below are set through. 4. A lithium-ion battery lower case according to claim 3, characterized in that: the vertical section of the lower case (31) is in the shape of a "several", and the lower case (31) is close to the base ( One side of 1) integrally extends out of the mounting plate (311), and the mounting plate (311) is fixed to the bottom wall outside the base body (1); The upper casing (32) is clamped on the lower casing (31) and fixed to each other through side walls, and the side wall of the lower casing (31) close to the base (1) is fixed to the outer wall of the base (1). 5. A lithium-ion battery lower case according to claim 3, characterized in that: two sleeves (33) are fixed side by side along the length direction in the gap, and the two sleeves (33) A positioning mechanism (4) is arranged between them. 6. A lithium ion battery lower case according to any one of claims 3-5, characterized in that: the positioning mechanism (4) is a positioning pin, and the bottom end of the positioning pin is fixed on the lower case (31 ) on the top wall, the top end of the positioning pin extends through the top wall of the upper housing (32). 7. A lithium-ion battery lower box according to claim 1, characterized in that: the base (1) is provided with an opening at the top, and a first reinforcing rib (11) is integrally fixed on the bottom wall of the base (1) , the top of the side wall of the base body (1) is integrally fixed with a flanging (12), the side wall of the base body (1) is fixed with second reinforcing ribs (13) at intervals, one of the base body (1) At least one plug-in hole (14) is opened on the side wall. 8. A lithium-ion battery lower box according to claim 7, characterized in that: the base (1) is integrally formed by DC04 low-carbon steel plate through die stamping, and the four corners of the base (1) are formed by Triangular stamping. 9. A lithium-ion battery lower box according to claim 1, characterized in that: the installation frame (2) sequentially comprises a left longitudinal beam (21), an upper beam (22), and a right longitudinal beam (23) , the lower beam (24), the middle beam (25), the BDU installation beam (26), the BMS installation beam (27), the left longitudinal beam (21), the upper beam (22), the right longitudinal beam (23), the lower The beam (24) and the middle beam (25) are arranged in sequence to form a "day" shape, and the BDU installation beam (26) and the BMS installation beam (27) are integrally fixed on the side of the lower beam (24) away from the middle beam (25) ; The left longitudinal beam (21) and the right longitudinal beam (23) are respectively fixed with the inner side wall and the bottom wall of the base body (1), and the upper cross beam (22) is fixed with the upper end side wall of the base body (1). The lower beam (24) is fixed to the inner bottom wall of the substrate (1), the middle beam (25) is fixed to the bottom wall in the middle of the substrate (1), and the BDU installation beam (26), BMS installation beam (27) and The side wall at the lower end of the substrate (1) is fixed. 10. The lower lithium-ion battery box according to claim 9, characterized in that: each beam of the installation frame (2) is provided with a plurality of leakage grooves (29) near the internal module.

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