CN214176139U

CN214176139U - Battery module based on pulling plate and pressing strip

Info

Publication number: CN214176139U
Application number: CN202120265773.8U
Authority: CN
Inventors: 杜俊丰; 邓江南; 刘晨南; 姜斌; 桂昊
Original assignee: Dongguan Tafel New Energy Technology Co Ltd; Jiangsu Tafel New Energy Technology Co Ltd; Jiangsu Tafel Power System Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2021-01-31
Filing date: 2021-01-31
Publication date: 2021-09-10
Anticipated expiration: 2031-01-31

Abstract

The utility model discloses a battery module based on a pulling plate and a pressing strip, which comprises a battery row, a first end plate, a pulling plate and a pressing strip which are sequentially arranged in a word in a clinging manner; the first end plates are arranged at two ends of the battery row in the battery arrangement direction and clamp the battery row at the two ends of the battery row; the two ends of the pulling plate are respectively connected with the first end plate, arranged on two sides of the battery row in the battery arrangement direction and used for clamping the battery row on two sides of the battery row; the two ends of the pressing strip are respectively connected with the first end plate and are used for being arranged on the side edges of the two sides of the top surface of the battery row and pressing the top surface of the battery row on the side edges of the top surface of the battery row. The utility model discloses a frame and the whole optimization of battery module to the fixed usefulness of battery module for the whole weight reduction of battery module, structural strength height uses more reliably, whole convenient advantage of preparation.

Description

Battery module based on pulling plate and pressing strip

Technical Field

The utility model relates to a power battery technical field, in particular to battery module fixed knot constructs frame and battery module thereof.

Background

With the continuous development of new energy automobile technology, the whole automobile is also continuously promoted in the direction of light weight and safety, and the requirement on a battery pack is higher. This requires the optimization of the part structure of the battery pack, which is lighter in weight, and the weight reduction of the battery module is more important.

Among the prior art, the structure of square shell battery module is mostly end plate and adds the curb plate structure, perhaps end plate adds the ribbon structure. Wherein end plate adds the curb plate structure because the curb plate adopts monoblock board, and weight is heavier, and whole board all contacts with the battery side, and the battery module dispels the heat when low temperature heating is very fast, also can lead to battery module temperature uniformity to be relatively poor because of energy loss when the cooling.

The end plate adds the ribbon structure, and the ribbon is owing to can appear relaxing under the vibration operating mode after tightening, and its structural strength is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the problem that will solve: the structural strength of the end plate binding belt is poor, and the weight of the end plate binding side plate is poor in heat dissipation.

In order to solve the above problem, the utility model discloses a scheme as follows:

according to the utility model discloses a battery module based on arm-tie and layering, include by the battery in proper order in a word hug closely the range and form battery row, first end plate, arm-tie and layering; the first end plates are arranged at two ends of the battery row in the battery arrangement direction and clamp the battery row at the two ends of the battery row; the two ends of the pulling plate are respectively connected with the first end plate, arranged on two sides of the battery row in the battery arrangement direction and used for clamping the battery row on two sides of the battery row; the two ends of the pressing strip are respectively connected with the first end plate, arranged on the side edges of the two sides of the top surface of the battery row and used for pressing the top surface of the battery row.

Further, according to the battery module of the present invention, the pulling plate includes a main body portion and a bent portion; the main body part is a strip-shaped plate body, and the width of the main body part is not more than half of the height of the battery; the bending part is fixedly connected to two ends of the main body part in the strip direction and forms a U-shaped structure with the main body part; the bent part is buckled on the outer end face of the first end plate; the inner side of the body portion is closely attached to the side of the battery row.

Further, according to the utility model discloses a battery module, be provided with additional strengthening on the main part, additional strengthening is ruffle or dashes concave structure.

Further, according to the battery module of the present invention, the side surfaces of both sides of the first end plate are respectively provided with a pull plate limiting groove; the pulling plate is clamped in the pulling plate limiting groove.

Further, according to the battery module of the present invention, the pressing bar includes a first pressing bar; the first pressing strip comprises a top pressing plate and a side pressing plate; the top pressure plate and the side pressure plate are connected into an L-shaped structure; the top pressure plate is tightly attached to the top surface of the battery row; the side pressure plates are tightly attached to the side faces of the battery rows.

Further, according to the battery module of the present invention, L-shaped sinking platforms are respectively disposed on both sides of the first end plate; the end parts of the side pressing plates are clamped in the L-shaped sinking platform.

Further, according to the battery module of the present invention, the first pressing bar further includes end fastening plates at both ends; the end buckle plate is buckled on the outer end face of the first end plate.

Further, according to the battery module of the present invention, a plurality of battery rows are arranged between the first end plates and between the pull plates; the battery arrangement directions of the battery rows are parallel, and the end parts of the two ends are flush.

Further, according to the battery module of the present invention, the pressing bar further includes a second pressing bar; the second pressing strip simultaneously presses the top surfaces of two adjacent battery rows.

Furthermore, the battery module also comprises a second end plate; the second end plate is parallel to the first end plate and positioned in the battery row to divide the battery row into at least two sections; the pulling plate and the pressing strip are fixedly connected with the second end plate.

The technical effects of the utility model are as follows: the utility model has the advantages that the whole weight of the battery module is reduced, the structural strength is high, the use is more reliable, and the whole manufacture is convenient by integrally optimizing the frame for fixing the battery module and the battery module; the pressing strip can prevent the battery from moving in the height direction, and the structure is more stable and reliable; in addition, the pull plate is arranged at the middle lower part of the battery module, so that the bottom pocket is not needed, and the overall height of the battery module can be reduced; and the contact surface of the pulling plate and the battery is small, so that the heat transfer during thermal runaway of the battery can be reduced.

Drawings

Fig. 1 is an exploded view of the overall structure of the first embodiment of the present invention.

Fig. 2 is a structural diagram of the reinforcing structure of the middle pulling plate of the present invention in a concave structure.

Fig. 3 is a structural diagram of the middle pulling plate of the present invention when the reinforcing structure is a hem.

Fig. 4 is a schematic structural view of the buckle plate at the end of the first pressing strip of the present invention.

Fig. 5 is a schematic view of the overall structure of the second embodiment of the present invention.

Fig. 6 is a schematic view of the overall structure of the third embodiment of the present invention.

In the figure:

10 is a battery row, 1 is a battery;

2 is a first end plate, 21 is a pull plate limiting groove, 22 is an L-shaped sinking platform, 23 is a weight reduction groove, 231 is a limiting installation groove, 2311 is a clamping boss, and 24 is a connecting hole;

3 is a pulling plate, 31 is a main body part, 311 is a reinforcing structure, 32 is a bending part, and 321 is a mounting hole;

4 is a pressing strip, 41 is a first pressing strip, 411 is a top pressing plate, 412 is a side pressing plate, 413 is an end buckle plate, 42 is a second pressing strip, and 421 is a U-shaped groove;

and 5 is a second end plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example one

As shown in fig. 1, a battery module based on a pull plate and a pressing strip comprises a battery row 10, a first end plate 2, a pull plate 3 and a pressing strip 4, wherein the batteries 1 are sequentially arranged in a line in a closely attached manner; the first end plates 2 are arranged at both ends of the battery row 10 in the arrangement direction of the batteries 1, and clamp the battery row 10 at both ends of the battery row 10; two ends of the pulling plate 3 are respectively fixedly connected with the first end plate 2 and are used for being arranged at two sides of the battery row 10 in the arrangement direction of the batteries 1 and clamping the battery row 10 at two sides of the battery row 10; the two ends of the pressing strip 4 are respectively connected with the first end plate 2, are arranged on the two side edges of the top surface of the battery row 10 and press the top surface of the battery row 10 on the side edges of the top surface of the battery row 10. Battery 1 in this battery module carries out the centre gripping from tip, lateral part and top through first end plate 2, arm-tie 3 and layering 4 for whole battery module weight alleviates greatly, and the structure is more firm reliable, in addition because reduce with battery 1's area of contact, thermal transmission when can significantly reduce battery 1 thermal runaway, does not set up the whole height that bottom clamping structure can effectually reduce battery module simultaneously.

Specifically, the pulling plate 3 includes a main body portion 31 and a bent portion 32. The main body portion 31 is an elongated plate body having a width not exceeding half the height of the battery 1, preferably one-third or one-fourth the height of the battery 1. The bending portions 32 are fixedly connected to two ends of the main body portion 31 in the longitudinal direction and form a U-shaped structure with the main body portion 31, more specifically, the pulling plate 3 is made of a long plate body with two ends bent by no more than 90 degrees, the two ends are bent to form the bending portions 32, and the portion between the two ends is the main body portion 31. The bent part 32 is buckled on the outer end face of the first end plate 2; the inner side of the body portion 31 abuts against the side of the battery row 10. The bending part 32 is buckled on the outer end face of the first end plate 2, namely the inner side face of the bending part 32 is tightly attached to the outer end face of the first end plate 2. The outer end surface of the first end plate 2 is a surface opposite to the inner end surface of the first end plate 2 with respect to the inner end surface of the first end plate 2. The inner end surface of the first end plate 2 is a surface which abuts against the end surface of the cell row 10.

In order to strengthen the physical strength of the pulling plate 3, as shown in fig. 2 and 3, a reinforcing structure 311 may be further provided on the main body portion 31. The reinforcing structure 311 may be a hem or a stamped and recessed structure. The ruffle structure is made by folding or flanging two sides of the plate body of the main body part 31. The punch-and-recess structure is formed by punching the body portion 31 with a punch.

Furthermore, the side surfaces of the two sides of the first end plate 2 are respectively provided with a pulling plate limiting groove 21; the pulling plate 3 is clamped in the pulling plate limiting groove 21.

In this embodiment, the pulling plate limiting grooves 21 are disposed at the middle lower portions of the two side surfaces of the first end plate 2, so that the pulling plate 3 is located at the middle lower portion of the first end plate 2. The lower-middle portion here means that the distance between the bottom edge of the pulling plate 3 and the bottom surface of the battery row 10 does not exceed the distance between the top edge of the pulling plate 3 and the top surface of the battery row 10. The pulling plate 3 is generally made of a metal material, preferably an aluminum alloy or a stainless steel material. The inner and outer surfaces of the pulling plate 3 are provided with insulating, high temperature resistant and fireproof material layers. The pulling plate 3 is fixed on the first end plate 2 by screws, that is, mounting holes 321 are provided on the bent portions 32, while corresponding connection holes 24 are provided on the outer end face of the first end plate 2, and the pulling plate 3 is fixed on the first end plate 2 by screwing screws through the mounting holes 321 and the connection holes 24. The pulling plate 3 can also be fixed to the first end plate 2 using a snap, weld or adhesive fixing as will be appreciated by the person skilled in the art.

In this embodiment, the pressing strip 4 adopts a first pressing strip structure, that is, the pressing strip 4 is a first pressing strip 41. As shown in fig. 4, the first pressing bar 41 includes a top pressing plate 411 and a side pressing plate 412. The top pressure plate 411 and the side pressure plate 412 are connected into an L-shaped structure; the top pressure plate 411 is tightly attached to the top surface of the battery row 10; the side pressure plates 412 are closely attached to the sides of the battery row 10. In this embodiment, the first pressing strip 41 is usually made of metal, preferably aluminum alloy or stainless steel, and the inner and outer surfaces are provided with insulating, high temperature resistant and fireproof material layers. The two ends of the top pressure plate 411 are provided with mounting holes 321, the top of the first end plate 2 is provided with a connecting hole 24, and the first pressing bar 41 is fixed with the first end plate 2 by using screws to be in threaded connection with the connecting hole 24 through the mounting holes 321.

Furthermore, the first pressing strip 41 may further include end fastening plates 413 at both ends. The end plate 413 can be connected to the end of the top plate 411, and is bent at an angle of less than 90 degrees at the end of the top plate 411. The end plate 413 may be connected to the end of the side plate 412, and the end of the side plate 412 may be bent at an angle of not more than 90 degrees. When the first pressing strip 41 is fixedly connected to the first end plate 2, the end fastening plate 413 is fastened to the outer end face of the first end plate 2, that is, the inner side face of the end fastening plate 413 is tightly attached to the outer end face of the first end plate 2, so that the contact area between the first pressing strip 41 and the battery row 10 is increased, and the structural stability is improved.

Further, two sides of the first end plate 2 are respectively provided with an L-shaped sinking platform 22; when the first pressing bars 41 are respectively connected to the first end plates 2, the ends of the side pressing plates 412 thereof are caught in the L-shaped sinking tables 22.

Furthermore, a weight-reduction groove 23 may be further provided in the middle of the top surface of the first end plate 2, and the weight of the first end plate 2 is reduced by the weight-reduction groove 23.

Example two

As shown in fig. 5, unlike the first embodiment, in the present embodiment, the battery module further includes a second end plate 5, where the second end plate 5 is parallel to the first end plate 2 and is located in the battery row 10 to divide the battery row 10 into at least two sections; the pulling plate 3 and the pressing strip 4 are fixedly connected with the second end plate 5 through bolts. The second end plate 5 of the present embodiment is to reinforce the physical strength of the battery row 10 when the length thereof is excessively long. Generally, when the length of the battery row 10 is equal to or greater than 600, it is necessary to add the second end plate 5 between the first end plates 2. It is understood by those skilled in the art that when the length of the battery row 10 is excessively long, the second end plate 5 may be provided with two or more pieces.

EXAMPLE III

Unlike the first and second embodiments, the battery module of the present embodiment is a CTP module. That is, the battery module of the present embodiment is a battery press-fitting structure in a module-less battery pack in a general sense. Referring to fig. 6, there are a plurality of battery rows 10 between the first end plates 2 and between the pulling plates 3; the cells 1 of each cell row 10 are arranged in parallel, and the ends of the two ends are flush. It should be noted that, in the battery module illustrated in fig. 6, there are three battery rows 10, and those skilled in the art will understand that the number of the battery rows 10 may be greater.

The bead 4 includes a first bead 41 and a second bead 42. Wherein the structure of the first compression bead 41 refers to the first embodiment. The first compression beads 41 are located at the outer side edges of the two endmost cell rows 10 and press against the top surfaces and the side edges of the two endmost cell rows 10. The second compression beads 42 simultaneously press the top surfaces of two adjacent cell rows 10. The second bead 42 may be of an elongated plate-like configuration or may be of a T-shaped configuration, preferably a T-shaped configuration. In this embodiment, the second pressing strip 42 is a long strip-shaped plate-shaped structure, and a U-shaped groove 421 is provided in the middle of the second pressing strip 42, and the second pressing strip 42 is made of a metal material, and an insulating, high-temperature-resistant and fireproof material layer is provided on the inner and outer surfaces thereof; the first end plate 2 is provided with a limiting installation groove 231 matched with the second pressing strip 42 in the weight reduction groove 23, clamping bosses 2311 are arranged on the top surfaces of two side walls of the limiting installation groove 231, and the end part of the second pressing strip 42 is clamped in the limiting installation groove 231 and fixed through the clamping bosses 2311. The second pressing bar 42 with a T-shaped structure has a T-shaped cross section and includes a separation plate in addition to the top pressing plate 411. The top press plate 411 is horizontal and the division plate is vertical. The top pressing plate 411 and the separating plate form a T-shaped structure. When the second pressing bar 42 presses two adjacent battery rows 10, the separating plate is clamped between the two adjacent battery rows 10, and the top pressing plate 411 respectively presses the top surfaces of the two adjacent battery rows 10.

In addition, in the present embodiment, the battery row 10 is long, and the battery module further includes the second end plate 5. The second end plate 5 is parallel to the first end plate 2 and is positioned in the battery row 10 to divide the battery row 10 into at least two sections, and the pull plate 3 and the pressing strip 4 are fixedly connected with the second end plate 5; the middle of the top surface of the second end plate 5 may also be provided with a weight-reducing groove 23, the middle of the second pressing bar 42 is provided with a U-shaped groove 421, the second end plate 5 is fixedly connected with the bottom surface of the weight-reducing groove 23 on the second end plate 5 through the U-shaped groove 421, the connection mode may be welding, bolts or the like, the mounted second pressing bar 42 clamps the two end surfaces of the battery row 10 separated by the second end plate 5 through the outer side surfaces of the groove walls on both sides of the U-shaped groove 421, and the stability and reliability of the battery module structure are further improved.

Claims

1. A battery module based on a pull plate and a pressing strip is characterized by comprising a battery row, a first end plate, the pull plate and the pressing strip, wherein the battery row is formed by sequentially and closely arranging batteries in a straight line; the first end plates are arranged at two ends of the battery row in the battery arrangement direction and clamp the battery row at the two ends of the battery row; the two ends of the pulling plate are respectively connected with the first end plate, arranged on two sides of the battery row in the battery arrangement direction and used for clamping the battery row on two sides of the battery row; the two ends of the pressing strip are respectively connected with the first end plate, arranged on the side edges of the two sides of the top surface of the battery row and used for pressing the top surface of the battery row.

2. The tie plate and bead based battery module of claim 1, wherein the tie plate includes a main body portion and a bent portion; the main body part is a strip-shaped plate body, and the width of the main body part is not more than half of the height of the battery; the bending part is fixedly connected to two ends of the main body part in the strip direction and forms a U-shaped structure with the main body part; the bent part is buckled on the outer end face of the first end plate; the inner side of the body portion is closely attached to the side of the battery row.

3. The tie plate and bar based battery module of claim 2, wherein the body portion has a reinforcing structure disposed thereon, the reinforcing structure being a hem or a stamped recess structure.

4. The battery module based on the pull plate and the pressing strip as claimed in claim 1, wherein the first end plate is provided with pull plate limiting grooves on both side surfaces thereof; the pulling plate is clamped in the pulling plate limiting groove.

5. The strap and compression bar based battery module of claim 1 wherein the compression bar comprises a first compression bar; the first pressing strip comprises a top pressing plate and a side pressing plate; the top pressure plate and the side pressure plate are connected into an L-shaped structure; the top pressure plate is tightly attached to the top surface of the battery row; the side pressure plates are tightly attached to the side faces of the battery rows.

6. The tie plate and batten based battery module according to claim 5, wherein the first end plate is provided with L-shaped sinking platforms at two sides respectively; the end parts of the side pressing plates are clamped in the L-shaped sinking platform.

7. The strap and batten based battery module of claim 5, wherein the first batten further comprises end buckles at both ends; the end buckle plate is buckled on the outer end face of the first end plate.

8. The tie plate and bar based battery module of claim 1, wherein there are a plurality of rows of cells between the first end plates and between the tie plates; the battery arrangement directions of the battery rows are parallel, and the end parts of the two ends are flush.

9. The strap and compression bar based battery module of claim 8 wherein the compression bar further comprises a second compression bar; the second pressing strip simultaneously presses the top surfaces of two adjacent battery rows.

10. The tie plate and bar based battery module of claim 1, further comprising a second end plate; the second end plate is parallel to the first end plate and positioned in the battery row to divide the battery row into at least two sections; the pulling plate and the pressing strip are fixedly connected with the second end plate.