Energy storage battery module

Abstract

The utility model discloses an energy storage battery module which comprises a shell, a polar plate and a cover plate, the shell comprises a lower shell and an upper shell which is detachably arranged on the lower shell, the lower shell and the upper shell are respectively provided with a first groove and a second groove which correspond to each other, the first groove and the second groove are arranged in an array mode, and the polar plate is arranged in the first groove. A positioning groove is defined by the first groove and the second groove; a first through hole and a second through hole are formed in the wall faces, located in the first groove and the second groove, of the lower shell and the upper shell respectively, the polar plates comprise the lower polar plate attached to the lower shell and the upper polar plate attached to the upper shell, the cover plates comprise the upper cover plate and the lower cover plate, the upper cover plate is detachably installed on the upper shell and attached to the upper polar plate, and the lower cover plate is detachably installed on the lower shell and attached to the upper polar plate. And the lower cover plate is detachably mounted on the lower shell and is attached to the lower polar plate. Through cooperation of the shell, the polar plate and the cover plate, limiting of the cylindrical lithium battery is achieved, the cylindrical lithium battery can be effectively protected, and stress of the cylindrical lithium battery is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery, especially a kind of energy storage battery module. BACKGROUND

[0002] With the development of energy storage battery module, more and more modules of battery adopt lithium battery structure, among which 18650 lithium battery is more applied, and energy storage battery module is formed by stacking.

[0003] The 18650 lithium battery is a standardized lithium ion battery, wherein 18 represents a diameter of 18 mm, 65 represents a length of 65 mm, and 0 represents a cylindrical battery. The 18650 battery has the advantages of light weight, large capacity, no memory effect, etc., and has been widely used.

[0004] For example, Chinese patent CN202322694356.7 adopts a welding structure of a bottom plate and a cover plate, but in actual use, for example, outdoor energy storage battery module, the structure requires the bottom plate and the cover plate to have good support and firm length, thereby avoiding stress deformation of the lithium battery, thus limiting the modularity of the structure, and mainly applied to some fixed structure energy storage battery module. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide an energy storage battery module, which is modularized and facilitates the assembly of cylindrical lithium batteries. At the same time, the structure is stable, can better protect the lithium battery body and the welding position, improve the structural stability, and the module has a reference model, which can be changed according to the number of individual lithium batteries, thereby improving the product applicability.

[0006] Therefore, different size brackets can be customized according to the needs of purchasers for assembly.

[0007] To achieve the above purpose, the utility model provides an energy storage battery module, comprising:

[0008] The shell comprises a lower shell and an upper shell detachably mounted on the lower shell, the lower shell and the upper shell are respectively provided with corresponding first grooves and second grooves, the first grooves and the second grooves are arrayed, the first grooves and the second grooves form positioning grooves, and the two ends of the positioning grooves are respectively used for accommodating the upper part and the lower part of the cylindrical lithium battery;

[0009] The wall surface of the lower shell and the upper shell at the first groove and the second groove is respectively provided with a first through hole and a second through hole,

[0010] The inner diameter of the first through hole is smaller than that of the first groove, and the inner diameter of the second through hole is smaller than that of the second groove,

[0011] The first through hole and the second through hole are used for exposing the tab of the cylindrical lithium battery;

[0012] The polar plate comprises a lower polar plate matched with the lower shell and an upper polar plate matched with the upper shell body;

[0013] The cover plate comprises an upper cover plate and a lower cover plate, the upper cover plate is detachably installed on the upper shell and matched with the upper polar plate,

[0014] The lower cover plate is detachably installed on the lower shell and matched with the lower polar plate.

[0015] In the actual design, through the cooperation of the shell, the polar plate and the cover plate, the limiting of the cylindrical lithium battery is realized, and different from the existing structure, through the setting of the first groove and the second groove, the cylindrical lithium battery can be effectively protected, the stress of the cylindrical lithium battery is reduced, at the same time, through the matched setting of the upper polar plate and the lower polar plate, the welding and fixation between the lithium batteries are facilitated, and through the cooperation of the upper cover plate and the lower cover plate, the protection of the cylindrical lithium battery and the polar plate is realized, and the assembly of the battery module is facilitated;

[0016] The number of the array arrangement of the positioning groove can be designed according to the actual requirement, so as to meet the battery module with different number and different requirement, and the assembly is relatively simple, and through the setting of the polar plate, the series connection or parallel connection of the positive electrode and the negative electrode is facilitated, so as to meet the requirement of different voltage or current, and the processing applicability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 For the explosion of the utility model Figure 1 ;

[0018] Figure 2 For the explosion of the utility model Figure 2 ;

[0019] Figure 3 For the three-dimensional schematic view of the utility model;

[0020] Figure 4 For the sectional view of the utility model;

[0021] Figure 5 For the half-section schematic view of the utility model.

[0022] In the drawings,

[0023] 1 is a shell, 11 is an upper shell, 12 is a lower shell, 11a is a first groove, 12a is a second groove,

[0024] 2 is a cylindrical lithium battery,

[0025] 31 is a first through hole, 32 is a second through hole,

[0026] 41 is the upper electrode plate, and 42 is the lower electrode plate.

[0027] 51 is the upper cover plate, 52 is the lower cover plate, and 5 is the pressing part.

[0028] 61 is the screw hole, and 62 is the screw rod.

[0029] 71 is the side panel, 72 is the side cover, and 7 is the stepped groove.

[0030] 81 is a protrusion, and 82 is a limiting hole.

[0031] 9 represents the heat insulation board. Detailed Implementation

[0032] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0033] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0035] like Figures 1 to 5 As shown, an energy storage battery module includes:

[0036] The shell 1 includes a lower shell 12 and an upper shell 11 detachably mounted on the lower shell 12, the lower shell 12 and the upper shell 11 are respectively provided with corresponding first grooves 11a and second grooves 12a, the first grooves 11a and the second grooves 12a are arrayed, and the first grooves 11a and the second grooves 12a form positioning grooves, two ends of the positioning grooves are used to accommodate the upper part and the lower part of the cylindrical lithium battery 2 respectively;

[0037] The wall surface of the lower shell 12 and the upper shell 11 at the first grooves 11a and the second grooves 12a is respectively provided with a first through hole 31 and a second through hole 32,

[0038] The inner diameter of the first through hole 31 is smaller than the inner diameter of the first groove 11a, and the inner diameter of the second through hole 32 is smaller than the inner diameter of the second groove 12a,

[0039] The first through hole 31 and the second through hole 32 are used for the tab of the cylindrical lithium battery 2 to be exposed;

[0040] The pole plate includes a lower pole plate 42 attached to the lower shell 12 and an upper pole plate 41 attached to the upper shell 11 of the body 1;

[0041] The cover plate includes an upper cover plate 51 and a lower cover plate 52, the upper cover plate 51 is detachably mounted on the upper shell 11 and attached to the upper pole plate 41,

[0042] The lower cover plate 52 is detachably mounted on the lower shell 12 and attached to the lower pole plate 42.

[0043] In actual design, through the cooperation of the shell 1, the pole plate and the cover plate, the cylindrical lithium battery 2 is limited, and the first grooves 11a and the second grooves 12a are arranged to effectively protect the cylindrical lithium battery 2 and reduce the stress on the cylindrical lithium battery 2. At the same time, through the attachment of the upper pole plate 41 and the lower pole plate 42, the welding and fixation between the lithium batteries are facilitated, and through the cooperation of the upper cover plate 51 and the lower cover plate 52, the protection of the cylindrical lithium battery 2 and the pole plate is realized, and the assembly of the battery module is also facilitated;

[0044] The number of arrayed positioning grooves can be designed according to actual requirements to meet different numbers and different requirements of battery modules, and the assembly is relatively simple. Through the arrangement of the pole plate, the positive and negative poles can be connected in series or parallel, thereby meeting different voltage or current requirements and improving processing applicability.

[0045] Specifically, the corner end or side frame of the upper shell 11 and the lower shell 12 is respectively provided with a screw hole 61 matched with each other, and a screw rod 62 is arranged through the screw hole 61 to fix the upper shell 11 and the lower shell 12, and of course, a positioning structure can also be arranged to fix the upper shell 11 and the lower shell 12.

[0046] In the embodiment of the utility model, the side plate 71 extends on one side of the upper shell 11 or the lower shell 12, and the side cover 72 is detachably installed on the side plate 71, thereby further improving the supporting degree and the anti-vibration effect of the shell 1.

[0047] Specifically, the top wall of the upper shell 11 and the top wall of the lower shell 12 are respectively provided with a stepped groove 7 for installing the polar plate and the cover plate.

[0048] Further, the outer peripheral wall of the polar plate and the cover plate is protected.

[0049] In the embodiment of the utility model, the first through hole 31 and the second through hole 32 respectively extend the convex part 81, the polar plate is provided with the limiting hole 82 matched with the outer periphery of the convex part 81, the outer wall of the convex part is in abutment with the inner wall of the limiting hole, thereby ensuring the welding fixation and positioning between the tab and the polar plate.

[0050] Specifically, the polar plate extends the conductive part (not shown, which can refer to the existing welding structure or integrated structure) connected with the tab, the cover plate is provided with the pressing part 5 matched with the conductive part, and the pressing part 5 is used to apply pressure to the conductive part to make the conductive part contact with the tab.

[0051] In the embodiment of the utility model, the polar plate and the tab are welded and fixed, and different conductive fixing modes can be selected according to different requirements. Preferably, the conductive part is abutted with the tab.

[0052] Specifically, the plurality of cylindrical lithium batteries 2 are combined bodies, and the adjacent combined bodies are provided with the heat insulation plate 9 clamped between the upper shell 11 and the lower shell 12.

[0053] One side of the heat insulation plate 9 is outwardly bent and fixed to the upper shell 11 or the lower shell 12, thereby realizing the fixation.

[0054] In the embodiment of the utility model, the polar plate is a single body or is composed of a plurality of pieces, thereby forming a loop to the positive electrode and the negative electrode, which can be actually set according to actual requirements; the structural strength is improved.

[0055] Specifically, the pressing part 5 is provided with a hollow hole, which can heat the part of the tab.

[0056] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the inventive concept of the present application, as described in the present application specification and drawings, is included in the patent protection scope of the present application.

Claims

1. An energy storage battery module, characterized by, The application relates to a lithium battery shell. The shell comprises a lower shell and an upper shell detachably mounted on the lower shell, the lower shell and the upper shell are respectively provided with corresponding first grooves and second grooves, the first grooves and the second grooves are arranged in an array, the first grooves and the second grooves form positioning grooves, and two ends of the positioning grooves are used for accommodating upper parts and lower parts of cylindrical lithium batteries respectively. The wall surfaces of the first grooves and the second grooves of the lower shell and the upper shell are respectively provided with first through holes and second through holes. The inner diameter of the first through holes is smaller than that of the first grooves, and the inner diameter of the second through holes is smaller than that of the second grooves. The first through holes and the second through holes are used for exposing tab ears of the cylindrical lithium batteries. The polar plate comprises a lower polar plate attached to the lower shell and an upper polar plate attached to the upper shell. The cover plate comprises an upper cover plate and a lower cover plate, the upper cover plate is detachably mounted on the upper shell and attached to the upper polar plate, The lower cover plate is detachably mounted on the lower shell and attached to the lower polar plate.

2. The energy storage battery module of claim 1, wherein: The corner ends or side frames of the upper shell and the lower shell are respectively provided with screw holes matched with each other, and a screw rod is used for fixing the upper shell and the lower shell after penetrating through the screw holes.

3. The energy storage battery module of claim 1, wherein: One side of the upper shell or the lower shell extends a side plate, and a side cover is detachably mounted on the side plate.

4. The energy storage battery module of claim 1, wherein: The top wall of the upper shell and the top wall of the lower shell are respectively provided with stepped grooves for mounting the polar plate and the cover plate.

5. The energy storage battery module of claim 1, wherein: The first through holes and the second through holes respectively extend convex parts, the polar plate is provided with limiting holes matched with the peripheries of the convex parts, and the outer walls of the convex parts are in abutment with the inner walls of the limiting holes.

6. The energy storage battery module of claim 1, wherein: The polar plate extends a conductive part connected with the tab ear, the cover plate is provided with a pressing part matched with the conductive part, and the pressing part is used for applying pressure to the conductive part so as to make the conductive part contact with the tab ear.

7. The energy storage battery module of claim 1, wherein: The polar plate is welded with the tab ear.

8. The energy storage battery module of claim 1, wherein: A plurality of cylindrical lithium batteries form a combination, and a heat insulation plate is arranged between adjacent combinations and clamped between the upper shell and the lower shell. One side of the heat insulation plate is outwardly bent and fixed on the upper shell or the lower shell.

9. The energy storage battery module of claim 1, wherein: The polar plate is a single body or is composed of a plurality of pieces.

10. The energy storage battery module of claim 6, wherein: The pressing part is provided with a hollow hole.

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