CN219832908U

CN219832908U - Lithium iron phosphate battery pack

Info

Publication number: CN219832908U
Application number: CN202321302888.5U
Authority: CN
Inventors: 朱文浩; 廖荣成; 李小鹏
Original assignee: Anhui Zhitong New Energy Co ltd
Current assignee: Anhui Zhitong New Energy Co ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-10-13
Anticipated expiration: 2033-05-26

Abstract

The utility model relates to the technical field of lithium iron phosphate batteries, in particular to a lithium iron phosphate battery pack; the strip-shaped first rack assembly vertically arranged on the battery module is matched with the elastic clamping plate fixed on the second bottom plate, so that the end part of the elastic clamping plate is obliquely arranged downwards, the battery module enables the elastic clamping plate to elastically shrink when being installed in a downward sliding manner, the fixing and the dismounting of the battery module are not affected, after the battery module is placed at a designated position, the end part of the elastic clamping plate elastically stretches outwards and enters between two adjacent sawteeth, the end part of the elastic clamping plate is utilized to prop against the surface of the sawteeth so as to prevent the battery module from fluctuating in the vertical direction in the running process of the electric vehicle, and meanwhile, the clamping of the positioning column to the bottom of the battery module is matched, so that the battery module is prevented from shaking in the horizontal direction; the problem of among the prior art battery module in the lithium iron phosphate battery package of electric motor car be difficult to effectively fix, lead to having the potential safety hazard easily because of colliding with the shell in the process of riding is solved.

Description

Lithium iron phosphate battery pack

Technical Field

The utility model relates to the technical field of lithium iron phosphate batteries, in particular to a lithium iron phosphate battery pack.

Background

The lithium iron phosphate battery is a widely applied battery type, and in the production process, a lithium iron phosphate battery pack of an electric vehicle mainly installs a battery module in a rectangular shell, then covers an upper cover and a lower cover, and a circuit for charging and discharging the battery module and protecting a circuit is generally arranged in the upper cover, so that a certain gap is needed between the inner wall of the shell and the outer wall of the battery module to effectively put the battery module in.

The manner in which the rectangular tube is clearance fit with the battery module, while saving the machining process, also causes some problems: first, in the electric motor car in-process of riding, especially can cause the repeated collision between battery module and the shell on the road surface of jolting, influence the safe handling of battery module easily, especially in the hotter time of summer weather, hotter weather cooperation is the battery that jolts repeatedly more easily makes the battery take place the risk of burning, there is certain potential safety hazard, and secondly, also some adopt the mode that the screw was fixed battery module to the shell, but the crust of itself shell and battery module is plastic material, the screw is general moment of torsion less in order to avoid smooth tooth and damage shell or battery module's crust when fixed, the vibrations of battery module that cause when the electric motor car is ridden easily arouse the loosening of screw, consequently also be difficult to effectually fix.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the lithium iron phosphate battery pack, which solves the problems that the battery module in the lithium iron phosphate battery pack of the electric vehicle is difficult to effectively fix in the prior art, so that potential safety hazards are easily caused by collision with a shell in the riding process.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a lithium iron phosphate battery package, includes tubular box, installs battery module in the box, and box one end detachably installs the upper cover, and box other end detachably installs the lower cover, be equipped with the fixed establishment who is used for fixed battery module in the box.

The fixing mechanism comprises a plurality of first rack assemblies fixed on the battery module shell, a plurality of second bottom plates are fixed on the inner wall of the box body, a plurality of elastic clamping plates connected with the first rack assemblies in a clamping mode are fixed on the second bottom plates, one end of each elastic clamping plate, which faces the inner side, is arranged in a downward inclined mode, the length of each elastic clamping plate is smaller than the distance between the elastic clamping plates, and a positioning column connected with the battery module in a clamping mode is vertically fixed on the inner wall of the lower cover.

Preferably, the first rack assembly comprises a first bottom plate fixed on the battery module shell, and saw teeth clamped with the plurality of elastic clamping plates are fixed on the first bottom plate.

Preferably, the top of the saw tooth is provided with a stop surface matched with the end part of the elastic clamping plate to prevent the battery module from moving upwards, and the bottom of the saw tooth is provided with an avoidance surface for avoiding the elastic clamping plate.

Preferably, the first rack assembly comprises a first mounting plate fixed on the battery module shell, and a plurality of spines are fixed on one surface of the first mounting plate facing to the outer side.

Preferably, a clamping groove which is clamped with the tip of the spike is formed in one surface of the elastic clamping plate, facing the spike, of the elastic clamping plate, a sliding surface for the spike to slide downwards is arranged on the bottom wall of the clamping groove, and a blocking surface for preventing the spike from sliding upwards is arranged on the top wall of the clamping groove.

Preferably, the positioning column is in a truncated cone shape.

Compared with the prior art, the utility model provides the lithium iron phosphate battery pack, which has the following beneficial effects:

the first rack assembly of vertical setting a plurality of bars on battery module cooperates and fixes the elastic clamping plate on the second bottom plate, through making the elastic clamping plate tip slope down set up, thereby battery module makes elastic shrinkage not influence battery module's fixed and dismantlement when the installation is slided downwards, after battery module places the assigned position, elastic clamping plate tip outwards elastically stretches out and enters into between two adjacent sawtooth, utilize the elastic clamping plate tip to prop up the sawtooth surface in order to prevent battery module in the electric motor car in-process of traveling in the ascending fluctuation of vertical direction, cooperation reference column simultaneously to the joint of battery module bottom, thereby prevent battery module rocking on the horizontal direction, consequently, the effective fixed to battery module has been realized.

The draw-in groove cooperation that sets up on the elastic clamping plate sets up the spine on first mounting panel, through the cooperation of spine and draw-in groove of specific shape to fix battery module, relatively used material is less, practices thrift the cost more.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic view of a three-dimensional structure of the present utility model;

FIG. 2 is a cross-sectional view of a three-dimensional structure of the present utility model;

FIG. 3 is an enlarged view of the utility model at A in FIG. 2;

FIG. 4 is a cross-sectional view of a second embodiment of the present utility model;

fig. 5 is an enlarged view of the present utility model at B in fig. 4.

In the figure: 1. a case; 2. a battery module; 3. an upper cover; 4. a lower cover; 5. a fixing mechanism; 51. a first rack assembly; 511. a first base plate; 512. saw teeth; a. a stop surface; b. an avoidance surface; 513. a first mounting plate; 514. spike; 52. a second base plate; 53. an elastic clamping plate; 54. positioning columns; c. a clamping groove; d. a sliding surface; e. a blocking surface.

Detailed Description

The following detailed description of embodiments of the present utility model will be given with reference to the accompanying drawings and examples, by which the implementation process of how the present utility model can be applied to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Example 1

Fig. 1-3 show an embodiment of the present utility model, in which a related clamping and fixing structure is provided between the casing and the outer casing of the lithium iron phosphate battery pack, so as to fix the battery without interfering with normal maintenance and replacement of the battery.

The utility model provides a lithium iron phosphate battery package, including tubular box 1, install battery module 2 in the box 1, box 1 one end detachably installs upper cover 3, box 1 other end detachably installs lower cover 4, box 1, battery module 2, upper cover 3 and lower cover 4 constitute lithium iron phosphate battery package among the prior art, wherein generally be equipped with certain circuit in the upper cover 3 and charge and discharge and certain protection to battery module 2, also can install certain locating device in the upper cover 3 in order to prevent battery theft, the details are not repeated here, be equipped with the fixed establishment 5 that is used for fixed battery module 2 in the box 1, fixed establishment 5 is used for carrying out the joint fixed to battery module 2, only need put into battery module 2 in box 1 when the equipment can, the convenience is assembled, can not hinder simultaneously and dismantle and change it after battery module 2 damages.

As a preferred technical solution of this embodiment, the fixing mechanism 5 includes a plurality of first rack assemblies 51 fixed on the housing of the battery module 2, a plurality of second bottom plates 52 are fixed on the inner wall of the case 1, a plurality of elastic clamping plates 53 clamped with the first rack assemblies 51 are fixed on the second bottom plates 52, one end of each elastic clamping plate 53 facing the inner side is inclined downwards, the length of each elastic clamping plate 53 is smaller than the interval between the elastic clamping plates 53, when the battery pack is assembled, the battery module 2 is placed into the case 1, at this time, because one end of each elastic clamping plate 53 facing the inner side is inclined downwards, the bottom end of each elastic clamping plate 53 is elastically contracted towards one side far away from the battery module 2 in the process of sliding down the battery module 2, so that the battery module 2 can be effectively placed on the lower cover 4, at this time, the bottom end of each elastic clamping plate 53 is pushed into the gap of the teeth in the first rack assemblies 51, thereby preventing the first rack assembly 51 and the battery module 2 from vibrating up and down in the bumping process, and the elastic clamping plates 53 arranged at the two sides of the battery module 2, the elastic fixing of the battery module 2 positioned in the middle is realized by utilizing the elastic extrusion of the plurality of elastic clamping plates 53, a certain buffering effect can be realized when the battery module 2 is bumped, the battery module 2 is only required to be removed from the bottom when the battery module 2 is replaced, the positioning column 54 clamped with the battery module 2 is vertically fixed on the inner wall of the lower cover 4, the positioning column 54 is used for further preventing the battery module 2 from vibrating back and forth in the horizontal direction, the respective degrees of freedom of the battery module 2 are fixed by matching with the elastic clamping plates 53, thereby realizing the clamping fixation of the battery module 2 and improving the stability of the battery module 2 in the riding process through the structure, the probability of danger of the battery module 2 due to vibration is reduced, and meanwhile, the replacement, disassembly and assembly of the battery module 2 are not affected.

As a preferred technical solution of this embodiment, the first rack assembly 51 includes a first bottom plate 511 fixed on the housing of the battery module 2, and a plurality of saw teeth 512 clamped with the elastic clamping plates 53 are fixed on the first bottom plate 511, when the battery module 2 is placed into the box 1, the saw teeth 512 contact with the elastic clamping plates 53, and the bottom ends of the elastic clamping plates 53 elastically contract to a side far away from the saw teeth 512, after the battery module 2 is placed into a designated position, the elastic clamping plates 53 are clamped into a position between two adjacent saw teeth 512, so that when the battery module 2 moves upwards due to jolt, the bottom ends of the elastic clamping plates 53 prop against the upper surfaces of the saw teeth 512 below, so as to prevent the battery module 2 from rolling, thereby effectively keeping the stability of the battery module 2 in the running process of the electric vehicle and improving the safety of the battery pack.

As the preferred technical scheme of this embodiment, the top of sawtooth 512 is equipped with the backstop face a that prevents battery module 2 upward movement with the cooperation of elastic clamping plate 53 tip, when battery module 2 produced the trend of upward movement when jolting, the bottom of elastic clamping plate 53 just in time supported in backstop face a department, can further set up relevant stripe or carry out rough treatment in order to improve frictional force between the two on backstop face a elastic clamping plate 53, with the resistance that improves elastic clamping plate 53 to sawtooth 512, sawtooth 512 bottom is equipped with and is used for dodging elastic clamping plate 53 dodging face b, dodging face b makes elastic clamping plate 53 can enter into the position that effectively contacts with backstop face a, thereby can prevent the fluctuation of battery module 2 in the electric motor car driving process.

As the preferred technical scheme of this embodiment, the reference column 54 is round platform shape, of course the smaller diameter one end of round platform shape reference column 54 inserts battery module 2 bottom, on the one hand realizes the quick location to battery module 2 in the installation, on the other hand, because battery package's main weight lies in battery module 2, consequently through the cooperation of round platform shape reference column 54 and battery module 2 bottom, battery module 2 needs to produce the trend of upwards moving this moment in order to rock on the horizontal plane, but can prevent battery module 2 upwards moving under the effect of elastic clamping plate 53 to can effectually fix battery module 2, guarantee battery module 2's stability in the electric motor car running process.

Example two

Fig. 4 to 5 show an embodiment of the present utility model, and the same technical effects as those of the first embodiment can be achieved by the structure of the first rack assembly 51 and the elastic clip 53 of another structure.

The second embodiment is substantially the same as the first embodiment except that: the first rack assembly 51 includes a first mounting plate 513 on the housing of the battery module 2, and a plurality of spikes 514 are fixed on one surface of the first mounting plate 513 facing the outside, and the battery module 2 can be smoothly mounted by matching the spikes 514 with the elastic clamping plate 53, and the battery module 2 is prevented from fluctuating up and down in the bumping process of the electric vehicle.

As a preferred technical solution of this embodiment, a clamping groove c that is engaged with the tip portion of the spike 514 is formed on one surface of the elastic clamping plate 53 facing the spike 514, a sliding surface d that is used for sliding the spike 514 downward is provided on the bottom wall of the clamping groove c, a blocking surface e that is used for preventing the spike 514 from sliding upward is provided on the top wall of the clamping groove c, and the matching between the spike 514 and the elastic clamping plate 53 can be optimized by further providing the clamping groove c, the sliding surface d and the blocking surface e on the elastic clamping plate 53, so that the matching between the spike 514 and the elastic clamping plate 53 is more stable, when the battery module 2 is installed, the spike 514 sequentially slides down through a plurality of clamping grooves c through the sliding surface d, and after the battery module 2 reaches a designated position, the battery module 2 is fixed by using the blocking surface e to the spike 514, thereby making the battery module 2 more stable in the running process of the electric vehicle.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a lithium iron phosphate battery package, includes tubular box (1), installs battery module (2) in box (1), and upper cover (3) are installed to box (1) one end detachably, and lower cover (4) are installed to box (1) other end detachably, its characterized in that: a fixing mechanism (5) for fixing the battery module (2) is arranged in the box body (1);

the fixing mechanism (5) comprises a plurality of first rack assemblies (51) fixed on the shell of the battery module (2), a plurality of second bottom plates (52) are fixed on the inner wall of the box body (1), a plurality of elastic clamping plates (53) clamped with the first rack assemblies (51) are fixed on the second bottom plates (52), the elastic clamping plates (53) are arranged in a downward inclined mode towards the inner side, the length of each elastic clamping plate (53) is smaller than the distance between the elastic clamping plates (53), and positioning columns (54) clamped with the battery module (2) are vertically fixed on the inner wall of the lower cover (4).

2. The lithium iron phosphate battery pack according to claim 1, wherein: the first rack assembly (51) comprises a first bottom plate (511) fixed on the shell of the battery module (2), and sawteeth (512) clamped with a plurality of elastic clamping plates (53) are fixed on the first bottom plate (511).

3. The lithium iron phosphate battery pack according to claim 2, wherein: the top of the saw tooth (512) is provided with a stop surface (a) which is matched with the end part of the elastic clamping plate (53) to prevent the battery module (2) from moving upwards, and the bottom of the saw tooth (512) is provided with a avoiding surface (b) for avoiding the elastic clamping plate (53).

4. The lithium iron phosphate battery pack according to claim 1, wherein: the first rack assembly (51) comprises a first mounting plate (513) fixed on the shell of the battery module (2), and a plurality of spines (514) are fixed on one surface of the first mounting plate (513) facing to the outer side.

5. The lithium iron phosphate battery pack according to claim 4, wherein: the one side of elastic clamping plate (53) towards spine (514) has offered draw-in groove (c) with spine (514) tip block, is equipped with on draw-in groove (c) diapire and is used for spine (514) gliding sliding surface (d), and draw-in groove (c) roof is equipped with and is used for preventing spine (514) gliding blocking surface (e) upward.

6. The lithium iron phosphate battery pack according to claim 1, wherein: the positioning column (54) is in a truncated cone shape.