Lithium iron phosphate battery pack

Abstract

The utility model discloses a lithium iron phosphate battery pack. The lithium iron phosphate battery pack comprises a battery shell, single lithium iron phosphate batteries and elastic spacing and limiting components, and a plurality of groups of uniformly distributed monomer lithium iron phosphate batteries are distributed in the battery shell. The elastic interval limiting assembly is fixedly assembled in the battery shell and comprises multiple sets of upper clamping rings, the lower portions of the multiple sets of single lithium iron phosphate batteries are sleeved with lower clamping rings, the upper clamping rings and the lower clamping rings are correspondingly arranged, and a pair of assembling clamping plates are assembled on the outer sides of the upper clamping rings and the outer sides of the lower clamping rings in a clamped mode. A plurality of evenly-distributed supporting stand columns are fixedly connected between the pair of assembly clamping plates. According to the lithium iron phosphate battery pack disclosed by the utility model, the plurality of single lithium iron phosphate batteries are combined and limited by adopting the elastic spacing limiting components, so that the adverse effect on the rest of the lithium iron phosphate batteries caused by volume increase after the single lithium iron phosphate batteries are charged and discharged for multiple times is reduced; and the use stability of the lithium iron phosphate battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium iron phosphate battery technical field, concretely relates to a lithium iron phosphate battery pack. BACKGROUND

[0002] The lithium iron phosphate battery pack is a kind of battery that multiple lithium iron phosphate batteries are combined together, and the lithium iron phosphate battery is a kind of lithium ion battery using lithium iron phosphate material as positive material and carbon as negative material, with the advantages of high working voltage, large energy density and small self-discharge rate, and is widely applied in new energy vehicles, starting power supply and energy storage power supply fields.

[0003] The common lithium iron phosphate battery pack is mainly composed of multiple lithium iron phosphate batteries, and in the process of combining multiple lithium iron phosphate batteries, the lithium iron phosphate batteries are separated by an insulating plate, and the multiple lithium iron phosphate batteries are connected by welding or other connection methods, and then the combined lithium iron phosphate batteries are fixed by a battery shell.

[0004] The lithium iron phosphate battery pack in the prior art is mostly combined by multiple single lithium iron phosphate batteries, and the lithium iron phosphate batteries are assembled and fixed by sleeving and limiting the combined lithium iron phosphate batteries, however, the volume of single lithium iron phosphate battery increases after multiple charging and discharging, and when the volume of single lithium iron phosphate battery increases, it not only exerts pressure on other single lithium iron phosphate batteries and interferes with heat dissipation, but also seriously deforms the lithium iron phosphate battery pack, so that the use stability of the lithium iron phosphate battery pack is poor.

[0005] Therefore, in view of the above technical problems, it is necessary to provide a lithium iron phosphate battery pack.

[0006] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the present utility model and is not intended to be a recognition or any form of suggestion that this information forms prior art that is already known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at providing a lithium iron phosphate battery pack, which can reduce the adverse effects caused by the volume increase of single lithium iron phosphate battery and improve the use stability of the lithium iron phosphate battery pack.

[0008] In order to achieve the above-mentioned purpose, a lithium iron phosphate battery pack is provided in a specific embodiment of the utility model, which comprises a battery shell, single lithium iron phosphate batteries and an elastic spacing limiting assembly.

[0009] The battery shell is provided with multiple groups of single lithium iron phosphate batteries distributed uniformly.

[0010] The elastic spacing and limiting assembly is fixedly assembled in the battery shell, the elastic spacing and limiting assembly comprises a plurality of upper clamping rings, the plurality of upper clamping rings are sleeved on the outer sides of the single lithium iron phosphate batteries, a plurality of lower clamping rings are sleeved below the plurality of single lithium iron phosphate batteries, the upper clamping rings and the lower clamping rings are correspondingly arranged, a pair of assembly clamping plates are assembled and clamped on the outer sides of the upper clamping rings and the lower clamping rings, and a plurality of uniformly distributed supporting columns are fixedly connected between the pair of assembly clamping plates.

[0011] In one or more embodiments of the present application, the upper portion of the battery shell is fixedly assembled with a shell cover, and the battery shell and the shell cover cooperatively form a closed battery shell. The closed battery shell facilitates the storage and closed protection of the plurality of single lithium iron phosphate batteries.

[0012] In one or more embodiments of the present application, inner elastic pads are attached to the inner walls of the plurality of upper clamping rings and lower clamping rings. The attachment of the inner elastic pads to the inner walls of the upper clamping rings and the lower clamping rings not only improves the stability of the upper clamping rings and the lower clamping rings in clamping and limiting the single lithium iron phosphate batteries, but also allows the inner elastic pads to elastically limit the single lithium iron phosphate batteries through contraction and resetting.

[0013] In one or more embodiments of the present application, a plurality of upper protrusions are integrally formed on the outer sides of the plurality of upper clamping rings. The upper clamping rings are supported and limited by clamping and limiting the plurality of upper protrusions. A plurality of lower protrusions are integrally formed on the outer sides of the plurality of lower clamping rings. The lower clamping rings are supported and limited by clamping and limiting the plurality of lower protrusions.

[0014] In one or more embodiments of the present application, a plurality of struts are threadedly connected between the plurality of upper protrusions and the plurality of lower protrusions. The plurality of struts assist in supporting and limiting the upper clamping rings and the lower clamping rings, thereby improving the stability of the upper clamping rings and the lower clamping rings in assembling and limiting the single lithium iron phosphate batteries.

[0015] In one or more embodiments of the present application, an assembly limiting table is integrally formed below the pair of assembly clamping plates, and the assembly clamping plates are arranged in an L-shaped cross section. The assembly limiting table facilitates the support and limitation of the upper clamping rings and the lower clamping rings, thereby facilitating the assembly and fixation of the single lithium iron phosphate batteries.

[0016] In one or more embodiments of the present application, a plurality of assembly bolts are fixedly connected between the pair of assembly clamping plates and the plurality of supporting columns. The assembly bolts are used to assemble and fix the assembly clamping plates and the plurality of supporting columns.

[0017] Compared with the prior art, the utility model discloses a lithium iron phosphate battery pack, through adopting elastic interval spacing subassembly to the combination of a plurality of single lithium iron phosphate battery limiting, reduce the single lithium iron phosphate battery in the volume increase after multiple charge and discharge to the adverse effect of remaining lithium iron phosphate battery, improved lithium iron phosphate battery pack's use stability. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will be to the drawing needed to use in the embodiment or prior art description simple introduction. Obviously, the drawing in the following description only some embodiments of the utility model are recorded, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0019] Figure 1 It is the front view cross section of a lithium iron phosphate battery pack in an embodiment of the utility model;

[0020] Figure 2 It is Figure 1 Structure schematic view in A place in middle;

[0021] Figure 3 It is the partial structure perspective drawing of a lithium iron phosphate battery pack in an embodiment of the utility model;

[0022] Figure 4 It is Figure 3 Structure schematic view in B place in middle;

[0023] Figure 5 It is another partial structure perspective drawing of a lithium iron phosphate battery pack in an embodiment of the utility model;

[0024] Figure 6 It is the perspective drawing of a lithium iron phosphate battery pack in an embodiment of the utility model.

[0025] MAIN REFERENCE NUMERALS EXPLANATION:

[0026] 1-battery shell, 2-single lithium iron phosphate battery, 3-elastic interval spacing subassembly, 301-upper snap ring, 302-lower snap ring, 303-assembly clamping plate, 304-supporting column, 305-inner elastic pad, 306-upper boss, 307-lower boss, 308-

[0027] Supporting rod, 309-rotating bolt, 4-shell cover. DETAILED DESCRIPTION

[0028] In order to enable the personnel in the technical field to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person of ordinary skill in the art without creative labor should belong to the protection scope of the present application.

[0029] As shown in Figures 1 to 6 , a lithium iron phosphate battery pack in an embodiment of the present application comprises: a battery shell 1, single lithium iron phosphate batteries 2, and an elastic spacing limiting assembly 3.

[0030] As shown in Figure 6 , the upper part of the battery shell 1 is fixedly assembled with a shell cover 4, and the battery shell 1 cooperates with the shell cover 4 to form a closed battery shell. It is convenient to store and protect multiple single lithium iron phosphate batteries 2 through the closed battery shell.

[0031] As shown in Figures 1 to 3 , multiple groups of single lithium iron phosphate batteries 2 are evenly distributed in the battery shell 1.

[0032] As shown in Figure 5 , the elastic spacing limiting assembly 3 is fixedly assembled in the battery shell 1, and the elastic spacing limiting assembly 3 comprises multiple groups of upper clamping rings 301, the multiple groups of upper clamping rings 301 are all sleeved on the outer side of the single lithium iron phosphate batteries 2, the lower part of the multiple groups of single lithium iron phosphate batteries 2 is sleeved with lower clamping rings 302, and the upper clamping rings 301 and the lower clamping rings 302 are correspondingly arranged. The multiple groups of single lithium iron phosphate batteries 2 are spaced and assembled and limited through the upper clamping rings 301 and the lower clamping rings 302. Through the spacing assembly mode of the multiple single lithium iron phosphate batteries 2, the mutual interference of the multiple groups of single lithium iron phosphate batteries 2 after volume expansion caused by multiple charging and discharging is reduced.

[0033] As shown in Figures 1 to 5 , the inner walls of the multiple groups of upper clamping rings 301 and lower clamping rings 302 are all attached with inner elastic pads 305. By attaching the inner elastic pads 305 on the inner walls of the upper clamping rings 301 and the lower clamping rings 302, not only the stability of the upper clamping rings 301 and the lower clamping rings 302 in clamping and limiting the single lithium iron phosphate batteries 2 is improved, but also the single lithium iron phosphate batteries 2 are elastically limited through the contraction and reset of the inner elastic pads 305.

[0034] As shown in Figures 3 to 4 , the outer sides of the upper clamping rings 301 and the lower clamping rings 302 are clamped and assembled with a pair of assembly

[0035] clamping plates 303. It is convenient to assemble and limit the multiple upper clamping rings 301 through the pair of assembly clamping plates 303.

[0036] As shown in Figures 3 to 4 , a plurality of uniformly distributed support columns 304 are fixedly connected between a pair of assembly clamping plates 303. The pair of assembly clamping plates 303 are assembled and fixed by the plurality of support columns 304.

[0037] As shown in Figure 5 , a plurality of upper protrusions 306 are integrally formed on the outer side of each of the plurality of upper clamping rings 301. The upper clamping ring 301 is supported and limited in position by clamping and limiting the plurality of upper protrusions 306.

[0038] As shown in Figure 5 , a plurality of lower protrusions 307 are integrally formed on the outer side of each of the plurality of lower clamping rings 302. The lower clamping ring 302 is supported and limited in position by clamping and limiting the plurality of lower protrusions 307.

[0039] As shown in Figure 5 , a plurality of upper protrusions 306 and lower protrusions 307 are threadedly connected with a support rod 308. The upper protrusions 306 and lower protrusions 307 are assisted in supporting and limiting in position by the plurality of support rods 308, thereby improving the stability of the upper clamping ring 301 and the lower clamping ring 302 in assembling and limiting the single lithium iron phosphate battery 2.

[0040] Specifically, a pair of assembly clamping plates 303 are integrally formed with an assembly limiting platform below, and the cross section of the assembly clamping plate 303 is arranged in an L shape. The upper clamping ring 301 and the lower clamping ring 302 are conveniently supported and limited in position by the assembly limiting platform, thereby facilitating the assembly and fixation of the single lithium iron phosphate battery 2.

[0041] As shown in Figure 3 , a plurality of support columns 304 are fixedly connected between a pair of assembly clamping plates 303 and a plurality of support columns 304. The assembly clamping plate 303 and the plurality of support columns 304 are assembled and fixed by the plurality of support columns 304.

[0042] In specific use, a plurality of lower clamping rings 302 are clamped and assembled below the single lithium iron phosphate battery 2, then the assembly clamping plate 303 is sleeved above the plurality of single lithium iron phosphate batteries 2, a plurality of upper clamping rings 301 are clamped and assembled above the single lithium iron phosphate battery 2, and then the support rod 308 is assembled between the upper clamping ring 301 and the lower clamping ring 302 in a threaded connection manner. After assembly is completed, the other assembly clamping plate 303 is arranged below the lower clamping ring 302, a plurality of support columns 304 are fixedly assembled between a pair of assembly clamping plates 303 by a plurality of support columns 304, and the battery shell 1 and the shell cover 4 are sleeved outside the assembly clamping plate 303 to complete the assembly.

[0043] In use, a plurality of single lithium iron phosphate batteries 2 are independently assembled and limited by a plurality of upper clamping rings 301 and lower clamping rings 302, so that the plurality of single lithium iron phosphate batteries 2 have expansion and heat dissipation gaps, reducing the mutual interference of the plurality of single lithium iron phosphate batteries 2 after multiple charging and discharging expansions. At the same time, the upper clamping ring 301 and the lower clamping ring 302 can be elastically clamped to the single lithium iron phosphate battery 2 by setting the inner elastic pad 305, reducing the deformation of the lithium iron phosphate battery pack caused by the volume expansion of the single lithium iron phosphate battery after multiple charging and discharging. The use stability of the lithium iron phosphate battery pack is improved.

[0044] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0045] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A lithium iron phosphate battery pack characterized by, Include: The battery shell is arranged with multiple groups of uniformly distributed single lithium iron phosphate battery; The elastic spacing limiting assembly is fixedly assembled in the battery shell, the elastic spacing limiting assembly includes multiple groups of upper snap rings, multiple groups of the upper snap rings are sleeved on the outer side of the single lithium iron phosphate battery, multiple groups of the single lithium iron phosphate battery are sleeved with lower snap rings below, the upper snap ring and the lower snap ring are correspondingly arranged, a pair of assembly clamping plates are assembled on the outer side of the upper snap ring and the lower snap ring, multiple uniformly distributed support columns are fixedly connected between a pair of the assembly clamping plates.

2. The lithium iron phosphate battery pack of claim 1, wherein, The upper side of the battery shell is fixedly assembled with a shell cover, and the battery shell and the shell cover cooperate to form a closed battery shell.

3. The lithium iron phosphate battery pack of claim 1, wherein, The inner walls of multiple groups of the upper snap ring and the lower snap ring are attached with inner elastic pads.

4. The lithium iron phosphate battery pack of claim 1, wherein, Multiple upper protrusions are integrally formed on the outer side of multiple groups of the upper snap ring, and multiple lower protrusions are integrally formed on the outer side of multiple groups of the lower snap ring.

5. A lithium iron phosphate battery pack as claimed in any one of claims 1, 2 or 3, characterised in that, Multiple upper protrusions are integrally formed on the outer side of multiple groups of the upper snap ring, and multiple lower protrusions are integrally formed on the outer side of multiple groups of the lower snap ring.

6. The lithium iron phosphate battery pack of claim 4, wherein, Multiple upper protrusions are integrally formed on the outer side of multiple groups of the upper snap ring, and multiple lower protrusions are integrally formed on the outer side of multiple groups of the lower snap ring.

7. The lithium iron phosphate battery pack of claim 1, wherein, Multiple upper protrusions and lower protrusions are threadedly connected with support rods.

8. The lithium iron phosphate battery pack of claim 1, wherein, The lower side of a pair of the assembly clamping plates is integrally formed with an assembly limiting table, and the cross section of the assembly clamping plate is arranged in an L shape.

9. A lithium iron phosphate battery pack as claimed in claim 1, 2, 3, 4 or 6, wherein, A pair of the assembly clamping plates and multiple support columns are fixedly connected with transfer bolt pieces. A pair of the assembly clamping plates and multiple support columns are fixedly connected with transfer bolt pieces.

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