CN216597839U

CN216597839U - Additional strengthening of laminate polymer battery module

Info

Publication number: CN216597839U
Application number: CN202122666054.XU
Authority: CN
Inventors: 董清世; 成燕; 孙振翼
Original assignee: Xinyi Power Suzhou Co ltd
Current assignee: Xinyi Power Suzhou Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-05-24
Anticipated expiration: 2031-11-02

Abstract

The embodiment of the utility model discloses a reinforced structure of a soft package battery module, which comprises support pieces arranged on two end faces in the length direction of a rectangular battery module; the two supporting pieces are connected through the reinforcing piece and enclose a frame structure, and the frame structure surrounds the outside of the four side surfaces of the battery module. By adopting the utility model, the support piece supports the two sides of the battery module in the length direction, so that the safety of the two sides of the battery module in the length direction is ensured; through setting up the reinforcement to link to each other the reinforcement with support piece and enclose into frame construction, and make frame construction encircle outside four sides of battery module, strengthened the security of battery module, to four planes formation better protection of battery module, prevent that the battery module from taking place to warp because of receiving the striking in abominable service condition.

Description

Additional strengthening of laminate polymer battery module

Technical Field

The utility model relates to the technical field of soft package batteries, in particular to a reinforcing structure of a soft package battery module.

Background

At present, China is in the period of energy conversion of vehicles, new energy vehicles are increasing day by day, and lithium ion power vehicles are one of representatives of the new energy vehicles. The key technology of the lithium ion power automobile is a lithium ion battery, and many factors need to be considered in the design of the lithium ion power automobile, so that the performance of the battery can meet the requirements of the automobile, and the battery can have sufficient safety and reliability.

The soft package battery is a high-performance battery composed of a positive electrode, a negative electrode, electrolyte, a packaging film and the like, can be charged and discharged at a high rate, has a long service life, and is widely applied to the field of new energy automobiles. Pouch cells, however, are often present: the aluminum-plastic film is easy to pierce, the top seal folded edge and the sealing position are easy to be touched to damage leakage, and the aluminum lug of the battery core is difficult to weld; many electricity core series-parallel connection are difficult in groups, and welding process is a great deal of problems such as complicated, have also restricted laminate polymer battery's application when bringing the potential safety hazard for laminate polymer battery's use, therefore laminate polymer battery establishes additional strengthening when using outside often overlapping. When laminate polymer battery is used for the comparatively harsh place of operating mode such as vehicle, need install the battery module earlier in additional strengthening, fixed battery module again, there is structural strength difference in current additional strengthening, receives the yielding problem of impact.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the additional strengthening to laminate polymer battery module among the prior art intensity is poor, receives the yielding problem of impact, provides the additional strengthening of a laminate polymer battery module that structural strength is good.

In order to realize the purpose of the utility model, the utility model provides the following technical scheme:

a reinforcing structure of a soft package battery module comprises supporting pieces arranged on two end faces in the length direction of a rectangular battery module; the two supporting pieces are connected through the reinforcing piece and enclose a frame structure, and the frame structure surrounds the four side surfaces of the battery module.

According to the technical scheme, the support piece is arranged, and supports are formed on the two sides of the battery module in the length direction, so that the safety of the two side surfaces of the battery module in the length direction is guaranteed; the reinforcing part is arranged, and the reinforcing part is connected with the supporting part to form a frame structure, so that the frame structure surrounds the four side surfaces of the battery module, the four planes of the battery module are well protected, the safety of the battery module is enhanced, and the battery module is prevented from being deformed due to impact in severe use working conditions; when battery pack received the impact promptly, frame construction received the impact force at first, prevented that battery module from receiving direct striking, perhaps certain deformation that frame construction accessible self produced to absorb the impact force, thereby protect battery module.

Furthermore, the supporting piece is U-shaped, two sides of the U-shaped supporting piece are connecting parts, and two ends of the battery module are clamped into the U-shaped groove bottom of the supporting piece; the reinforcing member connects the two supporting members together by a connecting portion. Because the supporting piece is U-shaped, and the two ends of the battery module are clamped into the U-shaped groove bottom of the supporting piece, the supporting piece protects the edges clamped into the groove bottom of the battery module, the safety of the battery module is further ensured, and the battery module is prevented from being deformed due to impact in the use working conditions of automobiles and the like; the two U-shaped side surfaces of the supporting piece can be of a slightly short structure, namely, the size of the connecting part is reduced as much as possible, so that the connecting part meets the structural strength requirement and the reinforcing piece can be conveniently fixed; the size of the connecting part is reduced, so that the weight of the whole reinforcing structure is reduced, and the idea of lightweight design is met.

Furthermore, two reinforcing pieces are arranged on the same plane of the battery module and are symmetrically arranged and in a V shape. Each connecting part is fixed with the end parts of the two reinforcing pieces, namely the two reinforcing pieces are arranged on two opposite surfaces of the battery module, so that the structural strength of the two planes is enhanced, and the protection effect on the battery module is good; the reinforcing piece is symmetrical in structure and balanced in stress; the number of reinforcements sets up as required, can not be restricted to two, according to specific service condition, like the size of battery module, the size of reinforcement, the thickness of reinforcement etc. the number of reconsideration reinforcements and the mode of arranging of adjustment reinforcement.

Further, the reinforcement is the channel-section steel and its opening side is battery module dorsad, the both ends and the connecting portion spiro union of reinforcement. The channel steel is used for manufacturing the reinforcing piece, so that the manufacturing is convenient, the cost is low, and the structural strength is good; the spiro union structure is located the groove type structure, prevents that the spiro union structure from receiving the collision, strengthens whole additional strengthening's stability.

Furthermore, a mounting bracket with an L-shaped body is fixed on the supporting piece, and triangular stabilizing pieces are arranged on two sides of the mounting bracket. The mounting bracket plays a role in enhancing the strength of the whole reinforcing structure, and the mounting bracket is fixed on the supporting piece which is arranged on two end faces in the length direction of the battery module, so that the mounting bracket can be used as a carrying auxiliary structure of the battery module and is convenient to carry; the stable piece of maintenance has strengthened the structural strength of installing support, prevents the deformation of installing support.

Furthermore, a plurality of mounting holes are formed in the mounting bracket. The mounting hole can be used for fixing the mounting bracket body on the supporting piece and can also be used as a mounting hole of other workpieces.

Furthermore, the upper end face and the lower end face of the battery module are respectively provided with a strip-shaped mounting rod, and the end part of each mounting rod is fixed on the support piece through a screw rod. The mounting rods are arranged on the upper end face and the lower end face of the battery module, and form protective structures for the upper face and the lower face, so that the structural strength of the upper end face and the lower end face of the battery module is enhanced.

Furthermore, the upper end face and the lower end face of the battery module are provided with two mounting rods, and the mounting rods are located on side lines of the end faces. The installation pole is located the sideline department of upper and lower both ends face, and two up-and-down terminal surfaces all are equipped with two installation poles for the installation pole all forms the protection to four crest lines departments of upper and lower both ends face, prevents that battery module arris portion from receiving the damage after the striking.

Further, the top of battery module is equipped with the apron, and the apron is the working of plastics and is equipped with bellied strengthening rib up. The top at battery module is established to the apron, forms the protection to battery module's top, sets up the strengthening rib on the apron, has further strengthened the structural strength of apron, and is better to planar protection effect on the battery module.

Further, the strengthening rib is arranged and is had two along the length direction of battery module. Set up two strengthening ribs and arrange along battery module's length direction, the radical of strengthening rib increases and length is long, has strengthened the structural strength of battery module apron, can protect battery module better.

The embodiment of the utility model has the following beneficial effects:

by adopting the technical scheme of the reinforcing structure of the soft package battery module, the supporting pieces are arranged to support the two sides of the battery module in the length direction, so that the safety of the two sides of the battery module in the length direction is guaranteed; the reinforcing part is arranged, and the reinforcing part is connected with the supporting part to form a frame structure, so that the frame structure surrounds the four side surfaces of the battery module, the four planes of the battery module are well protected, the safety of the battery module is enhanced, and the battery module is prevented from being deformed due to impact in severe use working conditions; when battery pack received the impact promptly, frame construction received the impact force at first, prevented that battery module from receiving direct striking, perhaps certain deformation that frame construction accessible self produced to absorb the impact force, thereby protect battery module.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

fig. 1 is a schematic view of a reinforcing structure of a pouch battery module according to an embodiment.

Fig. 2 is a front view of a reinforcing structure of a pouch battery module according to an embodiment.

In the figure:

10. a battery module; 20. a support member; 21. a connecting portion; 30. a reinforcement; 40. mounting a bracket; 41. maintaining and stabilizing the parts; 42. mounting holes; 50. mounting a rod; 60. a cover plate; 61. and (5) reinforcing ribs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a reinforcing structure of a pouch battery module includes support members 20 provided at both end surfaces of a rectangular battery module 10 in a length direction; the two support members 20 are connected by the reinforcing member 30 and enclose a frame structure, which surrounds the four sides of the battery module 10.

According to the utility model adopting the technical scheme, the support member 20 is arranged, and the support member 20 supports the two sides of the battery module 10 in the length direction, so that the safety of the two side surfaces of the battery module 10 in the length direction is guaranteed; by arranging the reinforcing member 30, connecting the reinforcing member 30 with the support member 20 to form a frame structure, and enabling the frame structure to surround the four side surfaces of the battery module 10, the four planes of the battery module 10 are well protected, the safety of the battery module 10 is enhanced, and the battery module 10 is prevented from being deformed due to impact in severe use working conditions; that is, when the battery pack is impacted, the frame structure receives the impact force at first, preventing the battery module 10 from being directly impacted, or the frame structure may absorb the impact force by a certain deformation generated by itself, thereby protecting the battery module 10.

As shown in fig. 1 and 2, preferably, the supporting member 20 is U-shaped, and two sides of the U-shape are connecting portions 21, and two ends of the battery module 10 are both clamped in the bottom of the U-shaped groove of the supporting member 20; the reinforcing member 30 connects the two supporting members 20 together by the connecting portion 21.

Because the supporting piece 20 is U-shaped, and the two ends of the battery module 10 are clamped into the U-shaped groove bottom of the supporting piece 20, the supporting piece 20 protects the edge of the clamped groove bottom of the battery module 10, the safety of the battery module 10 is further ensured, and the battery module 10 is prevented from being deformed due to impact in the use working conditions of automobiles and the like; here, both sides of the U-shape of the supporting member 20 may be configured to be slightly short, that is, the size of the connecting portion 21 may be reduced as much as possible, so that the connecting portion 21 satisfies the structural strength requirement and the reinforcement member 30 may be conveniently fixed.

To sum up, reducing the size of connecting portion 21 is favorable to reducing the weight of whole additional strengthening, satisfies the theory of lightweight design.

Preferably, two reinforcing members 30 are provided on the same plane of the battery module 10, and the two reinforcing members 30 are symmetrically arranged and have a V-shape.

In this embodiment, each connecting portion 21 is fixed to the end of each of the two reinforcing members 30, that is, the two opposing surfaces of the battery module 10 are provided with the two reinforcing members 30, so that the structural strength of the two planes is enhanced, and the protection effect on the battery module 10 is good; the reinforcing member 30 has a symmetrical structure and is evenly stressed.

In a specific application scenario, the number of the reinforcing members 30 is set as required, and may not be limited to two, and the number of the reinforcing members 30 and the arrangement manner of the reinforcing members 30 are considered again according to specific use conditions, such as the size of the battery module 10, the size of the reinforcing members 30, the thickness of the reinforcing members 30, and the like.

Preferably, the reinforcing member 30 is a channel steel, and the opening side thereof faces away from the battery module 10, and both ends of the reinforcing member 30 are screwed to the connection parts 21.

The channel steel is used for manufacturing the reinforcing piece 30, so that the manufacturing is convenient, the cost is low, and the structural strength is good; the spiro union structure is located the groove type structure, prevents that the spiro union structure from receiving the collision, strengthens whole additional strengthening's stability.

Preferably, a mounting bracket 40 having an L-shaped body is fixed to the support member 20, and triangular stabilizing members 41 are provided at both sides of the mounting bracket 40.

The mounting bracket 40 plays a role in enhancing the strength of the whole reinforcing structure, and since the mounting bracket 40 is fixed on the supporting member 20 and the supporting member 20 is arranged on both end surfaces of the battery module 10 in the length direction, the mounting bracket 40 can be used as a transportation auxiliary structure of the battery module 10 and is convenient to transport; the stabilizing member 41 enhances the structural strength of the mounting bracket 40 and prevents deformation of the mounting bracket 40.

Preferably, the mounting bracket 40 defines a plurality of mounting holes 42.

The mounting holes 42 may be used to secure the body of the mounting bracket 40 to the support member 20, or may be used as mounting holes 42 for other workpieces.

Preferably, the battery module 10 is provided with long mounting bars 50 on both upper and lower end surfaces thereof, and the ends of the mounting bars 50 are fixed to the support member 20 by screws.

The mounting bars 50 are provided on both upper and lower end surfaces of the battery module 10, and form a protective structure for the upper and lower end surfaces, thereby enhancing the structural strength of the upper and lower end surfaces of the battery module 10.

Preferably, the battery module 10 is provided with two mounting rods 50 on both the upper and lower end surfaces thereof, and the mounting rods 50 are located at the side lines of the end surfaces.

The installation pole 50 is located the sideline department of upper and lower both ends face, and two up-and-down terminal surfaces all are equipped with two installation poles 50 for installation pole 50 all forms the protection to four edges and corners departments of upper and lower both ends face, prevents that battery module 10 edges and parts from receiving the damage after the striking.

Preferably, the top of the battery module 10 is provided with a cover plate 60, and the cover plate 60 is a plastic member and is provided with a reinforcing rib 61 protruding upwards.

The apron 60 is established at the top of battery module 10, forms the protection to the top of battery module 10, sets up strengthening rib 61 on apron 60, has further strengthened apron 60's structural strength, and is better to the planar protection effect on battery module 10.

Preferably, two reinforcing ribs 61 are arranged in the longitudinal direction of the battery module 10.

Set up two strengthening ribs 61 and arrange along battery module 10's length direction, the radical of strengthening rib 61 increases and length is long, has strengthened the structural strength of battery module 10 top apron 60, can protect battery module 10 better.

Specifically, the reinforcing structure of the soft package battery in this embodiment has passed 8.2.1 vibration and 8.2.2 mechanical shock requirements in GB38031-2020 "power storage battery safety requirements for electric vehicles", and random vibration detection (XYZ axis), fixed frequency vibration detection (XYZ axis), and mechanical shock experiments (Z axis and-Z axis) were performed on the structure, and the detection results are:

(1) after the vibration test, the sample is reliably connected and has a complete structure without leakage, shell fracture, ignition and explosion phenomena;

(2) after the mechanical impact test, the appearance of the sample is not obviously damaged.

As shown in fig. 1 and 2, specifically, the cover plate 60 may be a sheet metal part or a plastic part, and the cover plate 60 made of the sheet metal part is beneficial to ensuring the structural strength, so as to better protect the battery module 10, and the cover plate 60 made of the plastic is beneficial to controlling the cost.

In addition, in order to fix the cover plate 60 on the battery module 10 conveniently, the reinforcing ribs 61 on the cover plate 60 are of a convex structure, and when the cover plate 60 is a sheet metal part, the reinforcing ribs 61 can be formed in a stamping mode, so that the battery module is convenient to form, good in strength and good in cost control effect; when the cover plate 60 is a plastic part, the reinforcing ribs 61 can be integrally formed with the cover plate 60 in an injection molding mode;

the structure of the reinforcing ribs 61 on the cover plate 60 can be multiple, the arrangement mode of the reinforcing ribs 61 on the cover plate 60 is not limited to different directions, the reinforcing ribs 61 can be arranged in a staggered mode or in a non-parallel mode according to a specific application scene, the number of the reinforcing ribs 61 can also be not limited to two, and the protruding height of the reinforcing ribs 61 on the cover plate 60 can also be adaptively adjusted according to a specific use scene and a possible stress condition;

referring to fig. 1, in the embodiment of the present invention, the reinforcing ribs 61 extend through the entire length direction of the cover plates 60, and the two cover plates 60 are arranged in parallel and are both groove-shaped concave structures.

As shown in fig. 1, in the embodiment of the present invention, the supporting member 20 is formed by bending a sheet metal part in a stamping manner, and the supporting member 20 is provided with a plurality of slotted hole structures, so as to be conveniently connected to the cover plate 60, the reinforcing member 30, and the like, so as to improve the stability of the mounted battery module 10, i.e., improve the stability and durability of the reinforcing structure of the battery module 10.

As shown in fig. 1 and fig. 2, specifically, the mounting bracket 40 can also be made of a sheet metal part, and also through a stamping manner, the manufacturing cost and difficulty are reduced, the mass manufacturing of the mounting bracket 40 is facilitated, because the mounting bracket 40 is L-shaped, the two ends of the mounting bracket 40 are fixed with the stabilizing members 41, the structural strength of the mounting bracket 40 is enhanced, the stabilizing members 41 can be directly fixed on the mounting bracket 40 through a welding manner, and through the arrangement of the stabilizing members 41, the relative stability of the two planes of the L-shaped mounting bracket 40 is enhanced, and the deformation of the mounting bracket 40 during the use is avoided.

As shown in fig. 1 and 2, in the present embodiment, each of the connecting portions 21 is fixed to the end portions of two of the reinforcing members 30.

In addition, in this embodiment, the battery module 10 is rectangular with a regular shape, the plate-shaped supporting members 20 are disposed on two end faces of the battery module 10 in the length direction, the reinforcing members 30 are disposed on the other two opposite side faces of the battery module 10 in the vertical direction, and the reinforcing members 30 are screwed on the supporting members 20, so that the supporting members 20 and the reinforcing members 30 form a rectangular frame structure together, the four vertical side faces of the battery module 10 are well protected, and the frame structure can receive impact force to prevent the battery module 10 from being directly impacted.

In the present embodiment, only two reinforcing members 30 having a V-shape in positional relationship are used.

In a specific application, a plurality of reinforcing members 30 arranged transversely may be used, and arranged in parallel on the side surface of the battery module 10, and fixed to the support member 20 in a screwing manner;

alternatively, similar to the position relationship of the present embodiment, a plurality of reinforcing members 30 are used, and they are arranged in a plurality of continuous and uniformly arranged V-shaped structures, and the two ends of each reinforcing member 30 are fixed on the supporting member 20 by the same screw-connection method.

The scope of the present invention is defined not by the above-described embodiments but by the appended claims and equivalents thereof.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A reinforcing structure of a soft package battery module is characterized by comprising supporting pieces arranged on two end faces in the length direction of a rectangular battery module; the two supporting pieces are connected through the reinforcing piece and enclose a frame structure, and the frame structure surrounds the four side faces of the battery module.

2. The reinforced structure of the soft package battery module according to claim 1, wherein the supporting member is U-shaped, two sides of the U-shape are connecting portions, and two ends of the battery module are clamped into the bottom of the U-shaped groove of the supporting member; the reinforcing member connects the two support members together through the connecting portion.

3. The reinforced structure of the laminate polymer battery module of claim 1, wherein two reinforcing members are arranged on the same plane of the battery module, and the two reinforcing members are symmetrically arranged and are V-shaped.

4. The reinforced structure of laminate polymer battery module of claim 2, characterized in that, the reinforcement is the channel-section steel and its opening side is towards the battery module, the both ends of reinforcement with the connecting portion spiro union.

5. The reinforced structure of the laminate polymer battery module of claim 1, wherein the support member is fixed with a mounting bracket having an L-shaped body, and two sides of the mounting bracket are provided with triangular stabilizing members.

6. The reinforced structure of the laminate polymer battery module of claim 5, wherein the mounting bracket is provided with a plurality of mounting holes.

7. The reinforcing structure of the pouch battery module according to claim 1, wherein the battery module is provided at both upper and lower end surfaces thereof with elongated mounting bars, and the ends of the mounting bars are fixed to the support members by screws.

8. The reinforced structure of the soft package battery module according to claim 7, wherein two mounting rods are arranged on the upper end surface and the lower end surface of the battery module, and the mounting rods are located on the side lines of the end surfaces.

9. The reinforced structure of the soft package battery module according to claim 8, wherein the top of the battery module is provided with a cover plate which is a plastic part and is provided with reinforcing ribs protruding upwards.

10. The reinforced structure of the pouch battery module according to claim 9, wherein the number of the reinforcing ribs is two and the reinforcing ribs are arranged in the length direction of the battery module.