Impact-resistant lithium battery module structure

Abstract

The utility model discloses an impact-resistant lithium battery module structure, relates to the related field of lithium battery modules, and aims to solve the problems in the prior art that the impact-resistant effect is achieved through an impact-resistant structure, the impact force is dispersed completely by virtue of the strength of the structure, and the impact force weakening effect is limited. The force unloading unit comprises force unloading assemblies, each force unloading assembly comprises four L-shaped rod bodies, the four L-shaped rod bodies are annularly arrayed, fixing blocks are formed at the staggered positions of the two ends of the four L-shaped rod bodies, and each force unloading assembly is fixed to the mounting box body and the battery box through the fixing blocks at the two ends; a first middle connecting rod body is fixed to the position, between the two opposite L-shaped rod bodies, of each force unloading assembly in a penetrating mode, and a second middle connecting rod body is fixed to the position, between the other two opposite L-shaped rod bodies, of each force unloading assembly in a penetrating mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related field of lithium battery module, concretely to a kind of impact-resistant lithium battery module structure. BACKGROUND

[0002] With the rapid development of global new energy market and the continuous enhancement of environmental protection consciousness, lithium battery, as a kind of efficient, environmental protection new energy, gradually becomes hot topic. Lithium battery module PACK is an important component in the manufacturing process of lithium battery, usually composed of multiple cells (monomer), and connected to each other by cable or plate connector. Lithium battery module is widely used in electric vehicles, energy storage systems, smart home, unmanned aerial vehicles and other fields. In the field of electric vehicles, lithium battery module is the core of vehicle energy storage system, directly affecting the performance and range of vehicle. In the field of energy storage system, lithium battery module is widely used in renewable energy storage products such as solar power generation and wind power generation. In the field of smart home and unmanned aerial vehicles, lithium battery module provides power support for equipment, supporting the intelligence and convenience of these devices.

[0003] The traditional new energy battery module has poor impact resistance in use, and is prone to deformation under external force, which affects the normal use of internal new energy batteries, and even may explode. In order to improve the safety and stability of lithium battery module, an impact-resistant lithium battery module structure needs to be designed.

[0004] For example, the Chinese authorized patent with publication number CN 208000948 U (a shock-resistant battery box) has a shock-resistant structure on the lower box body and / or the box upper cover. The outer surface of the lower box body includes first to fifth 5 rectangular planes, of which the first to fourth planes are side faces and the fifth plane is a bottom face. At least one plane on the outer surface of the lower box body has a shock-resistant structure. The exposed part of the battery box has a shock-resistant structure on the outside. The other outer surface of the battery box is one of a plane structure or a micro-concave surface structure. The shock-resistant structure is in the form of a convex bundle, and the convex bundle is in the form of a semi-spherical bundle. The number of convex bundles is multiple, and they are uniformly arranged on the exposed surface of the battery box. The convex bundles are arranged in a closely adjacent or slightly gap manner. The lower box body and the box upper cover have a flange-shaped outer edge, which is fixedly connected by bolts.

[0005] The above-mentioned prior art has the function of resisting impact, but the impact resistance effect is achieved by the shock-resistant structure, and the impact force is completely dispersed by the strength of the structure itself, and the impact force weakening effect is limited. UTILITY MODEL CONTENTS

[0006] The utility model discloses a purpose lies in providing a kind of impact-resistant lithium battery module structure to solve the effect of anti-impact by impact-resistant structure in the background art, impact force is completely dispersed by the strength of structure itself, and the impact force weakening effect is limited.

[0007] To achieve the above object, the utility model provides the following technical scheme: an impact-resistant lithium battery module structure, including outer installation box, outer installation box includes installation box body, the inside of installation box body forms inner placement cavity, battery box is installed in the inside of inner placement cavity;

[0008] The inside of installation box body four sides and lower end are provided with unloading unit along the outside of battery box;

[0009] The unloading unit includes unloading assembly, each unloading assembly includes four L-shaped rod bodies, four L-shaped rod bodies are arranged in a ring, and the staggered positions of the two ends of the four L-shaped rod bodies form fixing blocks. Each unloading assembly is fixed to the installation box body and the battery box through the fixing blocks at the two ends respectively. First intermediate connecting rods are fixed between the two L-shaped rod bodies on each unloading assembly. Second intermediate connecting rods are fixed between the other two L-shaped rod bodies on each unloading assembly. A plurality of unloading assemblies are arranged in an array and form an unloading unit through the first intermediate connecting rods and the second intermediate connecting rods.

[0010] Preferably, the four edges of the outer installation box are fixed with corner buffer columns, and the lower ends of the corner buffer columns are fixed with lower buffer hemispheres. The corner buffer columns and the lower buffer hemispheres extend to the inside edges and the four corners of the outer installation box.

[0011] Preferably, the battery box forms an inner installation cavity inside, and a plurality of single batteries are installed equidistantly inside the inner installation cavity. The upper ends of the plurality of single batteries and the lower ends of the plurality of single batteries are both provided with reinforcing connection supports.

[0012] Preferably, the reinforcing connection support includes a support body, and the support body wraps the outer sides of the plurality of single batteries. A weight-reducing groove is formed through the reinforcing connection support. A side heat dissipation reinforcing piece is fixed to the outer side of the reinforcing connection support, and the other end of the side heat dissipation reinforcing piece is attached to the inner end face of the battery box. An upper heat dissipation reinforcing piece is fixed to the outer end of the reinforcing connection support.

[0013] Preferably, an upper fixed edge is welded and fixed to the upper end of the battery box, and an upper mounting rack is provided on the upper end of the upper fixed edge. The upper mounting rack is fixed to the upper fixed edge by bolts.

[0014] Preferably, the upper end of the upper mounting rack is recessed inward to form a rectangular groove toward the battery box. A plurality of through grooves are formed through the upper and lower end faces of the upper mounting rack.

[0015] Preferably, the outer side of the installation box body is welded with a mounting member.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] (1) In the utility model, the force relieving unit is arranged, each force relieving assembly contains four annular array L-shaped rod bodies, the L-shaped rod bodies are compressed and deformed when being impacted, the relative angle between the L-shaped rod bodies is reduced, and the L-shaped rod bodies are buffered, meanwhile, the first intermediate connecting rod body and the second intermediate connecting rod body are respectively penetrated and fixed between the two opposite L-shaped rod bodies of each force relieving assembly, the first intermediate connecting rod body and the second intermediate connecting rod body conduct the force outward, and effective dispersion and relieving of force are realized.

[0018] (2) In the utility model, the first layer of impact resistant structure formed by the installation box body, the corner buffer column and the lower buffer hemisphere effectively reduces the impact force at the corner position, protects the safety of the outermost single battery, the design of the force relieving unit forms the second layer of impact resistant structure, realizes effective dispersion and relieving of force, the reinforcing connecting support serves as the third layer of impact resistant structure, comprehensively protects the edges of the single battery, and the overall impact resistant capacity of the lithium battery module is significantly improved.

[0019] (3) In the utility model, the weight reduction groove penetrated and arranged on the reinforcing connecting support not only reduces the overall weight, but also increases the heat dissipation area; the design of the side heat dissipation reinforcing piece and the upper heat dissipation reinforcing piece exchanges heat with the outside and the internal cooling assembly efficiently, effectively reduces the accumulation of heat outside the single battery, and improves the working efficiency and service life of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an overall structure schematic view of a main view angle of the impact resistant lithium battery module structure of the utility model;

[0021] Figure 2 It is an overall structure schematic view of a lower view angle of the impact resistant lithium battery module structure of the utility model;

[0022] Figure 3 It is a plan view of the impact resistant lithium battery module structure of the utility model;

[0023] Figure 4 It is a structure schematic view of the impact resistant lithium battery module structure of the utility model after removing the upper mounting frame;

[0024] Figure 5 It is a structure schematic view of the reinforced connecting support of the anti-impact lithium battery module structure of the utility model;

[0025] Figure 6 It is a structure schematic view of the anti-impact lithium battery module structure after removing the outer installation box of the utility model;

[0026] Figure 7 It is a structure schematic view of the outer installation box of the anti-impact lithium battery module structure of the utility model;

[0027] Figure 8 It is a structure schematic view of the force relieving assembly of the anti-impact lithium battery module structure of the utility model.

[0028] In the figure: 1, battery box; 2, upper fixed edge; 3, inner installation cavity; 4, single battery; 5, reinforced connecting support; 6, support body; 7, weight reduction groove; 8, side heat dissipation reinforcing piece; 9, upper heat dissipation reinforcing piece; 10, upper mounting frame; 11, rectangular groove; 12, through groove; 13, outer installation box; 14, installation box body; 15, inner placement cavity; 16, corner buffer column; 17, lower buffer hemisphere; 18, mounting piece; 19, force relieving unit; 20, force relieving assembly; 21, L-shaped rod body; 22, first intermediate connecting rod body; 23, second intermediate connecting rod body; 24, fixed block. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0030] Please refer to Figures 1-8 The utility model provides an embodiment:

[0031] (1) outer installation box and battery box structure:

[0032] The outer installation box 13 is composed of the installation box body 14, and the inner placement cavity 15 is formed in the inside of the installation box body 14 for accommodating the battery box 1; the outer side of the installation box body 14 is welded with the mounting piece 18, and these mounting pieces provide diversified installation options for the lithium battery module, which is convenient for flexible application in different scenes.

[0033] The battery box 1 is firmly installed in the inner placement cavity 15, and the four sides and the lower end are provided with a force relief unit 19 along the outside. The force relief unit 19 is composed of a plurality of force relief assemblies 20, each of which comprises four L-shaped rod bodies 21 arranged in a ring shape, which will be compressed and deformed when impacted, and the staggered positions of the two ends of the four L-shaped rod bodies 21 form fixed blocks 24, and the L-shaped rod bodies 21 are fixed with the installation box body 14 and the battery box 1 through the fixed blocks 24 at both ends. The first intermediate connecting rod body 22 and the second intermediate connecting rod body 23 are respectively fixed between the opposite two L-shaped rod bodies 21 of each force relief assembly 20, and a plurality of force relief assemblies 20 are arranged in an array and form a force relief unit 19 through the first intermediate connecting rod body 22 and the second intermediate connecting rod body 23; the first intermediate connecting rod body 22 and the second intermediate connecting rod body 23 work together to conduct and disperse the impact force outward, effectively improving the impact resistance of the battery module, improving the stability of the battery module when impacted, and reducing the risk of damage to the single battery.

[0034] The four edges of the outer installation box 13 are fixed with corner buffer columns 16, and the lower ends of the corner buffer columns 16 are connected with lower buffer hemispheres 17. These structures extend to the inner edges and corners of the outer installation box 13, forming an effective first layer of impact-resistant structure, which can effectively relieve the impact force at the edge and corner positions and protect the battery module from damage.

[0035] (2) Strengthen the design of the connecting bracket:

[0036] The inner installation cavity 3 is formed in the battery box 1 for equidistant installation of a plurality of single batteries 4. In order to strengthen the connection and protection between the single batteries 4, a reinforced connecting bracket 5 is provided. The reinforced connecting bracket 5 is composed of a bracket body 6, which is wrapped around the outside of the single battery 4, and a weight-reducing groove 7 is provided through the bracket body 6 to reduce the overall weight. The outer side of the bracket is fixed with side heat dissipation reinforcing pieces 8 and upper heat dissipation reinforcing pieces 9, which are attached to the inner end face of the battery box 1, enhancing the heat dissipation effect. The reinforced connecting bracket 5 not only provides additional protection, but also effectively reduces the temperature of the battery module through the design of the heat dissipation pieces, improving the working efficiency and safety.

[0037] (3) Design of upper mounting bracket and through slot:

[0038] The upper fixed edge 2 is welded on the upper end of the battery box 1, and the upper mounting bracket 10 is provided above the upper fixed edge 2, and the two are connected by bolts. The upper end of the upper mounting bracket 10 is recessed inward toward the battery box 1 to form a rectangular slot 11, which is convenient for installing accessories such as inner cooling assemblies. At the same time, a plurality of through slots 12 are provided through the upper end face of the upper mounting bracket 10, which are helpful for heat dissipation and air circulation. The upper mounting bracket 10 not only improves the stability of the installation, but also optimizes the heat dissipation performance through the setting of the rectangular slot and the through slot.

[0039] The lithium battery module is provided with three layers of impact-resistant structures.

[0040] The first layer of impact-resistant structure includes the mounting box body 14, the corner buffer column 16 and the lower buffer hemisphere 17; the mounting box body 14 itself provides protection, the corner buffer column 16 and the lower buffer hemisphere 17 provide buffering effect, and the damage of the outermost single battery 4 caused by the impact force at the corner position is reduced.

[0041] The second layer of impact-resistant structure includes the force relieving unit 19; when the first layer of impact-resistant structure is deformed by force or subjected to a conduction force, the L-shaped rod body 21 is compressed and deformed, the relative angle between the L-shaped rod bodies 21 is reduced, the L-shaped rod body 21 is buffered, and the force is conducted outward through the connection of the first intermediate connecting rod body 22 and the second intermediate connecting rod body 23, and the multiple force relieving assemblies 20 are cooperated to relieve the force.

[0042] The third layer of impact-resistant structure includes the reinforcing connecting bracket 5; the reinforcing connecting bracket 5 protects the edges of the single battery 4, so that the edges of the single battery 4 are not directly subjected to the impact force.

[0043] Meanwhile, the rectangular groove 11 has an internal cooling assembly; the side heat dissipation reinforcing piece 8 and the upper heat dissipation reinforcing piece 9 exchange heat with the outside and the internal cooling assembly, so that the heat accumulation outside the single battery 4 is reduced.

[0044] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A crash-resistant lithium battery module structure comprising an outer mounting box (13) comprising a mounting box box body (14), characterized in that: The installation box box body (14) is internally formed with an inner placement cavity (15), and the battery box (1) is internally installed in the inner placement cavity (15); The four sides and the lower end of the installation box box body (14) are provided with force relieving units (19) along the outer part of the battery box (1); The force relieving unit (19) comprises a force relieving assembly (20), each force relieving assembly (20) comprises four L-shaped rod bodies (21), the four L-shaped rod bodies (21) are arranged in a circular array, the staggered positions of the two ends of the four L-shaped rod bodies (21) are formed with fixing blocks (24), each force relieving assembly (20) is fixed with the installation box box body (14) and the battery box (1) through the fixing blocks (24) at the two ends, respectively, a first intermediate connecting rod body (22) is fixedly penetrated between the opposite two L-shaped rod bodies (21) on each force relieving assembly (20), a second intermediate connecting rod body (23) is fixedly penetrated between the other opposite two L-shaped rod bodies (21) on each force relieving assembly (20), and a plurality of force relieving assemblies (20) are arranged in an array and jointly form the force relieving unit (19) through the first intermediate connecting rod body (22) and the second intermediate connecting rod body (23). 2.The crash-resistant lithium battery module structure of claim 1, wherein: The four edges of the outer installation box (13) are fixedly provided with corner buffer columns (16), the lower ends of the corner buffer columns (16) are fixedly provided with lower buffer hemispheres (17), and the corner buffer columns (16) and the lower buffer hemispheres (17) extend to the edge and the four corners inside the outer installation box (13). 3.The crash-resistant lithium battery module structure of claim 1, wherein: The battery box (1) is internally formed with an inner installation cavity (3), a plurality of single batteries (4) are equidistantly installed in the inner installation cavity (3), and the upper ends of the outer parts of the plurality of single batteries (4) and the lower ends of the outer parts of the plurality of single batteries (4) are jointly provided with reinforcing connection supports (5).

4. The crashworthy lithium battery module structure of claim 3, wherein: The reinforcing connection support (5) comprises a support body (6), the support body (6) wraps the outer sides of the plurality of single batteries (4), a weight-reducing groove (7) is penetratingly formed in the reinforcing connection support (5), side heat dissipation reinforcing pieces (8) are fixedly arranged on the outer side of the reinforcing connection support (5), the other ends of the side heat dissipation reinforcing pieces (8) are attached to the inner end face of the battery box (1), and upper heat dissipation reinforcing pieces (9) are fixedly arranged on the outer end of the reinforcing connection support (5).

5. The crashworthy lithium battery module structure of claim 1, wherein: The upper end of the battery box (1) is peripherally welded and fixed with an upper fixing rail (2), the upper end of the battery box (1) is provided with an upper mounting rack (10) along the upper end of the upper fixing rail (2), and the upper mounting rack (10) and the upper fixing rail (2) are fixed through bolts.

6. The crashworthy lithium battery module structure of claim 5, wherein: The upper end of the upper mounting rack (10) is concave towards the direction of the battery box (1) and forms a rectangular groove (11), and a plurality of penetrating grooves (12) are penetratingly formed in the end face of the upper mounting rack (10).

7. The crashworthy lithium battery module structure of claim 1, wherein: The outer side of the installation box box body (14) is welded and fixed with a mounting piece (18).

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