CN212257467U

CN212257467U - Lightweight battery module

Info

Publication number: CN212257467U
Application number: CN202020600879.4U
Authority: CN
Inventors: 安占旺; 赵晓军; 杨乐乐; 信召峰
Original assignee: Lishen Power Battery System Co Ltd
Current assignee: Lishen Qingdao New Energy Co Ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-12-29
Anticipated expiration: 2030-04-21

Abstract

The utility model discloses a lightweight battery module, which comprises a battery module main body; the left side and the right side of the battery module main body are respectively provided with an end plate; an end plate insulation sheet is arranged between the battery module main body and each end plate; the battery module main body comprises a plurality of battery cores; an annular cushion pad between the electric cores is arranged between any two adjacent electric cores; the front end and the rear end of the two end plates are respectively and fixedly connected with a side plate; the upper part of one end plate is provided with an FPC output end connector bracket in an inserting way; the FPC output end connector is inserted into the FPC output end connector bracket; the FPC is bonded with the top of the battery cell; a plurality of bus bars are respectively arranged on the front side and the rear side of the top of the battery module main body. The utility model discloses a lightweight battery module through the optimization of structure, has saved the plastics frame support between electric core and the busbar, and overall structure good reliability has played positive effect to the promotion of energy density, the reduction of cost.

Description

Lightweight battery module

Technical Field

The utility model relates to a battery technology field especially relates to a lightweight battery module.

Background

At present, with the requirements of electric vehicles on endurance and price, low cost and light weight of battery systems are more and more important, wherein light weight and low cost of battery modules are particularly important.

However, most of the existing solutions are to make the module large, so that the weight of each component is reduced, and the simplification of the module structural member is often neglected; the cost of the plastic isolation support as an important structural part of the module accounts for 5% -10% of the cost of the structural part of the module, and in order to avoid an electric core explosion-proof valve and fix an aluminum row, an upper cover and the like, the design structure of the plastic isolation support is complex, the cost of a mold is high, and therefore the overall production cost of the battery module is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lightweight battery module to the technical defect that prior art exists.

Therefore, the utility model provides a lightweight battery module, which comprises a battery module main body;

the left side and the right side of the battery module main body are respectively provided with an end plate;

an upper cover and a bottom PC sheet are respectively arranged on the upper side and the lower side of the battery module main body;

an end plate insulation sheet is arranged between the battery module main body and each end plate;

the battery module main body comprises a plurality of battery cores which are longitudinally parallel and are vertically arranged;

an annular cushion pad between the electric cores is arranged between any two adjacent electric cores;

the front end and the rear end of the two end plates are respectively and fixedly connected with a side plate;

the upper part of one end plate is provided with an FPC output end connector bracket in an inserting way;

the top of the FPC output end connector support is provided with an FPC accommodating groove;

the FPC output end connector at the left end of the FPC is inserted into the FPC accommodating groove;

the FPC is bonded with the top of the battery cell;

a plurality of bus bars are respectively arranged on the front side and the rear side of the top of the battery module main body;

and the bus bar is welded with the battery cell pole columns at the front end and the rear end of the top of each battery cell.

The left end and the right end of the top of the battery cell are respectively provided with a battery cell pole;

the top of the battery cell is provided with a battery cell explosion-proof valve;

the top of the battery cell is arranged outside the battery cell explosion-proof valve and the battery cell pole column in a covering manner, and a PC sheet is arranged on the top of the battery cell;

and a battery cell protective film covers the periphery of the battery cell.

Wherein, the upper cover is positioned right above the bus bar and the FPC.

Wherein, a low-pressure output bracket mounting hole is reserved at the upper part of each end plate;

and a low-voltage output support is arranged in the low-voltage output support.

Wherein, a guide hole is reserved at the upper part of each end plate;

each end plate faces the inner side of the battery module main body and is provided with a circular mounting buckling hole;

the mounting buckle holes and the guide holes are symmetrically arranged and are mutually and vertically communicated;

a FPC output end connector bracket is placed in the guide hole;

the lower end of the FPC output end connector bracket is provided with an installation guide post;

an installation buckle is arranged at the opening of the middle part of the installation guide post;

the lateral wall of FPC holds the recess is provided with first buckle, second buckle and third buckle.

The FPC comprises an FPC main body;

the left end of the FPC main body is provided with an FPC output end connector which protrudes downwards and vertically;

a plurality of voltage temperature acquisition pieces are welded on connecting arms arranged on the front side and the rear side of the FPC main body at intervals;

the FPC output end connector support is clamped with the FPC output end connector through a buckle.

The blank area position in the middle of the FPC is arranged corresponding to the battery cell explosion-proof valve;

the FPC main body comprises two strip-shaped connecting arms which are stuck on the PC sheet on the battery core.

The left end and the right end of each bus bar are provided with a bus bar groove;

an upper cover fixing hole is formed in the bus bar groove;

the upper cover is provided with a snap fastener fixing hole at the position corresponding to the upper cover fixing hole on the busbar;

the snap fastener fixing holes are positioned in the snap fastener placing grooves;

the snap fastener placing groove and the bus bar groove are arranged up and down correspondingly.

The middle part of the inner side end of each bus bar is provided with a cell collecting and welding position for welding a cell pole;

the upper cover is provided with a plurality of upper cover reinforcing ribs which are distributed transversely.

Wherein, the bottommost of electricity core is higher than the bottom of end plate.

By above the utility model provides a technical scheme is visible, compare with prior art, the utility model provides a lightweight battery module, its structural design science, through the optimization of structure, saved the plastics frame support between electric core and the busbar, the battery module upper cover adopts PC piece plastic uptake technology to form, then fix on the busbar through the plastics buckle, overall structure good reliability, to energy density's promotion, positive effect has been played in the reduction of cost, favorable conditions has been created for the lightweight of battery module and low cost, great production practice meaning has.

Drawings

Fig. 1 is an exploded view of the overall structure of a lightweight battery module according to the present invention;

fig. 2 is a schematic view of an overall structure of a lightweight battery module according to the present invention;

fig. 3 is a schematic view of the preliminary assembly (without mounting the FPC output connector bracket, the FPC, the upper cover fixing snap fastener, etc.) of the lightweight battery module according to the present invention;

fig. 4 is a schematic structural view of an upper cover fixing snap fastener in the lightweight battery module provided in the present invention;

fig. 5 is a schematic structural view of an upper cover of a lightweight battery module according to the present invention;

FIG. 6 is an enlarged schematic view of portion A of FIG. 5;

fig. 7 is a schematic structural view of a bus bar in a lightweight battery module according to the present invention;

fig. 8 is a schematic structural view of an end plate in a lightweight battery module according to the present invention;

fig. 9 is a schematic structural diagram of a battery cell (after film winding, a top insulating sheet is attached) in the lightweight battery module provided by the present invention;

fig. 10 is a schematic structural view of a connector bracket at the output end of the FPC in the lightweight battery module according to the present invention;

fig. 11 is a schematic structural view of an FPC (flexible printed circuit board) in a lightweight battery module according to the present invention;

in the figure: 1. plastic fixing snap fasteners; 2. an upper cover; 21. an upper cover reinforcing rib; 22. the snap fastener placing groove; 23. snap fastener fixing holes;

3. a bus bar; 31. a busbar groove; 32. an upper cover fixing hole; 33. collecting a welding position of the battery core;

4. a low voltage output support; 5. a side plate; 6. a bottom PC sheet;

7. an end plate; 71. a guide hole; 72. installing a buckling hole;

8. an end plate insulating sheet; 9. an electric core; 91. a battery cell pole column; 92. a PC sheet; 93. a battery cell explosion-proof valve; 94. a battery cell protective film;

10. buffer pads between the electric cores; 11. FPC output end connector bracket;

110. FPC holds the groove, 111, the first buckle; 112. a second buckle; 113. a third buckle; 114. installing a guide post; 115. mounting a buckle;

12. FPC (flexible printed circuit board); 121. an FPC output end connector; 122. an FPC main body; 123. voltage temperature acquisition sheet, 124, blank area position.

Detailed Description

In order to make the technical means of the present invention easier to understand, the present application will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In addition, it should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the term "mounted" and the like should be interpreted broadly, and may be, for example, either fixedly mounted or detachably mounted.

The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

Referring to fig. 1 to 11, the present invention provides a lightweight battery module, which is a module inside a battery system for an electric vehicle, and specifically includes a battery module main body;

the left side and the right side of the battery module main body are respectively provided with an end plate 7;

the upper side and the lower side of the battery module main body are respectively provided with an upper cover 2 and a bottom PC sheet;

an end plate insulation sheet 8 is arranged between the battery module main body and each end plate 7;

the battery module main body comprises a plurality of battery cores 9 which are longitudinally parallel and are vertically arranged;

an annular cushion pad 10 between the battery cells is arranged between any two adjacent battery cells 9;

the front end and the rear end of the two end plates 7 are respectively and fixedly connected with a side plate 5;

the upper part of one end plate 7 is provided with an FPC output end connector bracket in an inserting way;

the top of the FPC output terminal connector holder 11 has an FPC (flexible printed circuit) receiving groove 110;

an FPC output terminal connector 121 provided at the left end of the FPC (flexible printed circuit board) 12 to be inserted into the FPC receiving groove 110;

an FPC (flexible printed circuit) 12 bonded to the top of the electric core 9;

a plurality of bus bars 3 are respectively arranged on the front side and the rear side of the top of the battery module main body;

the bus bar 3 is welded (e.g., laser welded) to the cell posts 91 at the front and rear ends of the top of each cell 9.

In the present invention, in particular, the left and right ends of the top of the battery cell 9 are respectively provided with a battery cell pole 91;

a cell explosion-proof valve 93 is arranged at the top of the cell 9;

the top of the battery cell 9 is covered with a PC sheet 92 at a portion outside the battery cell explosion-proof valve 93 and the battery cell pole 91;

the periphery of the battery cell 9 is covered with a battery cell protective film 94.

In the present invention, in the concrete implementation, the upper cover 2 is located directly above the bus bar 3 and the FPC (flexible printed circuit board) 12.

In the utility model, in the concrete implementation, a low-voltage output bracket mounting hole is reserved on the upper part of each end plate 7;

and a low-voltage output bracket 4 is arranged in the low-voltage output bracket.

In the present invention, in the concrete implementation, a guide hole 71 is reserved on the upper portion of each end plate 7;

each end plate 7 faces the inner side of the battery module main body and is provided with a circular mounting snap hole 72;

the mounting buckle holes 72 and the guide holes 71 are symmetrically arranged and are mutually and vertically communicated;

an FPC output end connector support 11 is arranged in the guide hole 71;

the lower end of the FPC output end connector bracket 11 is provided with an installation guide post 114;

an installation buckle 115 is arranged at the opening of the middle part of the installation guide column 114;

a sidewall of the FPC (flexible printed circuit) receiving groove 110 is provided with a first latch 111, a second latch 112, and a third latch 113.

In the present invention, in particular, the FPC (flexible printed circuit board) 12 includes an FPC main body 122;

the left end of the FPC main body 122 has an FPC output terminal connector 121 projecting vertically downward;

a plurality of voltage and temperature acquisition pieces 123 are welded on connecting arms arranged on the front side and the rear side of the FPC main body 122 at intervals;

the FPC output terminal connector bracket 11 is clamped with the FPC output terminal connector 121 through a buckle.

In particular, the FPC12 uses a pi-shaped structure, and a blank area 124 in the middle of the FPC12 is arranged corresponding to the battery cell explosion-proof valve 93, is a reserved position of the battery cell explosion-proof valve, and is used for reserving an enough channel for battery cell explosion;

in a specific implementation, the FPC main body 122 includes two strip-shaped connecting arms, and the two strip-shaped connecting arms are adhered to the PC sheet 92 on the battery cell.

In the present invention, in particular, a bus groove 31 is formed at each of the left and right ends of each bus bar 3;

in the bus bar groove 31, there is an upper cover fixing hole 32;

the upper cover 2 is provided with snap fastener fixing holes 23 at the positions corresponding to the upper cover fixing holes 32 on the busbar 3;

the snap fastener fixing hole 23 is positioned in the snap fastener placing groove 22;

the snap placing groove 22 and the bus bar groove 31 are arranged up and down correspondingly.

In concrete implementation, a cell collecting and welding position 33 is arranged in the middle of the inner side end of each busbar 3 and used for welding a cell pole 91.

In concrete implementation, the upper cover 2 is provided with a plurality of upper cover reinforcing ribs 21 which are distributed transversely.

The utility model discloses in, on specifically realizing, bottom PC piece 6 bonds in the bottom of battery module main part to protection bottom the battery has increased the one deck protection.

The utility model discloses in, on specifically realizing, upper cover 2 adopts PC piece plastic uptake shaping, simple structure, and is with low costs.

It should be noted that in the utility model discloses in, on specifically realizing, the recess of the fixed buckle of plastics is reserved to busbar 3 and upper cover 2, guarantees that the fixed buckle of plastics is in the installation back that finishes, and the highest face of the fixed buckle of plastics is lower than the battery module upper cover to do not influence the total height of module.

The utility model discloses in, on specifically realizing, FPC12 can use the aluminium silk welding, replaces present laser welding to come the collection of completion signal.

The utility model discloses in, on specifically realizing, the bottommost of electric core 9 is higher than the bottom of end plate 7, guarantees in assembling process that electric core bottom is not damaged.

It should be noted that, to the utility model discloses, have installation FPC connector support 11 on module one side end plate 7, this FPC connector support 11 passes through the buckle to be installed on end plate 7.

To the utility model discloses, there is not plastics to keep apart the support between electric core 9 and the busbar 3, has reduced the weight and the cost of module.

To the utility model discloses, the decurrent snap-fastener that upper cover 2 reserved puts recess 22 is used for the enhancement of upper cover body, does not occupy module height space simultaneously.

To the utility model discloses, the fixed buckle of plastics 1 passes module upper cover 2, finally detains the card in the upper cover fixed orifices 32 that busbar 3 reserved.

To the utility model discloses, the snap-fastener that holds the buckle is reserved to upper cover 2 and is put recess 22, can make the fixed buckle of plastics 1 sink in upper cover 2 the inside, guarantees that the module total height does not increase because of the buckle height.

In order to understand the technical solution of the present invention more clearly, the assembling process of the present invention is explained below.

First, the end plate 7, the cell 9, the end plate insulating sheet 8, the inter-cell buffer sheet 10, and the like are stacked and pressed, and then the side plates 5 are mounted on the end plate 7, and then the end plate 7 and the side plates 5 are combined together by laser welding (or CMT welding, riveting, bolting, or the like).

Then, assembling the low-voltage output support 4, assembling the busbar 5, and then welding the busbar 3 to the cell pole 91 at the top of the cell 9 by laser welding to complete the initial assembly of the module (see fig. 3);

then, the FPC output end connector bracket 11 is assembled into the guide hole 71 reserved in the end plate 7 through the installation guide column 114 thereon, and is clamped in the installation clamping hole 72 reserved in the end plate 7 through the installation clamping buckle 115; assembling an FPC output end connector 121 in the FPC output end connector bracket 11, and clamping the FPC output end connector with a first buckle 111, a second buckle 112 and a third buckle 113;

then, the FPC main body 122 is stuck to the PC sheet (polycarbonate sheet) 92 on the top of the electric core 9, and then the voltage and temperature acquisition sheet 123 is welded to complete the assembly of the FPC;

next, the upper cover 2 is placed to a predetermined position, the upper cover is fixed to the bus bar 3 by the plastic fixing clip 1, and after the upper cover 2 is fixed, the bottom PC sheet 6 is adhered to the bottom of the module, thereby completing the assembly of the battery module.

Compared with the prior art, the utility model provides a lightweight battery module has following beneficial effect:

1. the utility model discloses a battery module has saved plastics isolation support through the innovation of structure to through the adjustment of FPC shape, rationally avoid the explosion-proof valve of electric core, its security, lightweight, low-cost have obtained perfect embodiment.

2. For the battery module of the utility model, the FPC plug-in is fixed by the FPC fixing support, the FPC adopts a pi-shaped structure, the explosion-proof valve of the battery cell is completely exposed, and a channel is reserved for possible explosion spraying of the battery;

3. the utility model discloses a plastic uptake upper cover adopts the snap-fastener to fix on the aluminium is arranged, and the aluminium is arranged and the upper cover guarantees through the optimization of structure that the peak of plastics buckle is less than the peak of battery module upper cover. Therefore, the utility model discloses simple structure easily realizes, has played positive effect to battery system's low cost and lightweight.

It should be noted that, all the essential changes or improvements according to the present invention, such as the change of the shape of the upper cover, the change of the shape and the number of the buckle, the change of the FPC into the wiring harness, the change of the mounting manner of the FPC fixing bracket, etc., should fall into the protection scope of the present invention.

To sum up, compared with the prior art, the utility model provides a pair of lightweight battery module, its structural design science, through the optimization of structure, saved the plastics frame support between electric core and the busbar, the battery module upper cover adopts PC piece plastic uptake technology to form, then fixes on the busbar through the plastics buckle, overall structure good reliability, has played positive effect to the promotion of energy density, the reduction of cost, has created the advantage for the lightweight of battery module and low cost, has great production practice meaning.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A lightweight battery module is characterized by comprising a battery module main body;

the left side and the right side of the battery module main body are respectively provided with an end plate (7);

the upper side and the lower side of the battery module main body are respectively provided with an upper cover (2) and a bottom PC sheet;

an end plate insulation sheet (8) is arranged between the battery module main body and each end plate (7);

the battery module main body comprises a plurality of battery cores (9) which are longitudinally parallel and are vertically arranged;

an annular cushion pad (10) between the battery cells is arranged between any two adjacent battery cells (9);

the front end and the rear end of the two end plates (7) are respectively and fixedly connected with a side plate (5);

the upper part of one end plate (7) is provided with an FPC output end connector support in an inserting way;

the top of the FPC output end connector support (11) is provided with an FPC accommodating groove (110);

an FPC output terminal connector (121) arranged at the left end of the FPC (12) is inserted into the FPC accommodating groove (110);

the FPC (12) is bonded with the top of the battery cell (9);

a plurality of bus bars (3) are respectively arranged on the front side and the rear side of the top of the battery module main body;

and the bus bar (3) is welded with the battery cell pole columns (91) at the front end and the rear end of the top of each battery cell (9).

2. The lightweight battery module as set forth in claim 1, wherein the battery cell (9) has a battery cell post (91) at each of the left and right ends;

a battery cell explosion-proof valve (93) is arranged at the top of the battery cell (9);

the top of the battery cell (9) is arranged outside the battery cell explosion-proof valve (93) and the battery cell pole column (91) and covered with a PC sheet (92);

the periphery of the battery cell (9) is covered with a battery cell protective film (94).

3. The lightweight battery module according to claim 1, wherein the upper cover (2) is located directly above the bus bar (3) and the FPC (12).

4. The lightweight battery module according to claim 1, wherein a low-voltage output bracket mounting hole is reserved in the upper portion of one of the end plates (7);

and a low-voltage output bracket (4) is arranged in the low-voltage output bracket.

5. The lightweight battery module according to claim 1, wherein a guide hole (71) is reserved in an upper portion of each end plate (7);

each end plate (7) faces the inner side of the battery module main body and is provided with a circular mounting buckling hole (72);

the mounting buckle holes (72) and the guide holes (71) are symmetrically arranged and are mutually and vertically communicated;

an FPC output end connector support (11) is arranged in the guide hole (71);

the lower end of the FPC output end connector support (11) is provided with an installation guide post (114);

an opening in the middle of the installation guide post (114) is provided with an installation buckle (115);

the side wall of the FPC accommodating groove (110) is provided with a first buckle (111), a second buckle (112) and a third buckle (113).

6. The lightweight battery module according to claim 2, wherein the FPC (12) includes an FPC main body (122);

the left end of the FPC main body (122) is provided with an FPC output end connector (121) which protrudes downwards and vertically;

a plurality of voltage and temperature acquisition pieces (123) are welded on connecting arms arranged on the front side and the rear side of the FPC main body (122) at intervals;

the FPC output end connector support (11) is clamped with the FPC output end connector (121) through a buckle.

7. The lightweight battery module as set forth in claim 6, wherein a blank region position (124) provided in the middle of the FPC (12) corresponds to the cell explosion-proof valve (93);

the FPC main body (122) comprises two strip-shaped connecting arms which are stuck on the PC sheet (92) on the battery core.

8. The lightweight battery module according to claim 2, wherein each of the bus bars (3) has one bus bar groove (31) at both left and right ends thereof;

an upper cover fixing hole (32) is formed in the bus bar groove (31);

the upper cover (2) is provided with a snap fastener fixing hole (23) at the position corresponding to the upper cover fixing hole (32) on the bus bar (3);

the snap fastener fixing hole (23) is positioned in the snap fastener placing groove (22);

the snap button placing groove (22) and the bus bar groove (31) are arranged up and down correspondingly.

9. The lightweight battery module as recited in claim 8, wherein the middle of the inner end of each busbar (3) is provided with a cell collecting and welding position (33) for welding a cell post (91);

the upper cover (2) is provided with a plurality of upper cover reinforcing ribs (21) which are distributed transversely.

10. The lightweight battery module according to any one of claims 1 to 9, wherein the lowermost portion of the cell (9) is higher than the bottom portion of the end plate (7).