End plate type square shell battery cell module

Abstract

According to the end plate type square shell battery cell module, in the structure, a plurality of square shell battery cells are stacked, and a double-sided structural adhesive layer is arranged between every two adjacent square shell battery cells to form a module A; the pair of end plates are arranged at the two ends of the module A to form a module B, the hooping and limiting sinking tables are concavely arranged on the end plates to limit the steel belt, and the steel belt is matched with the hooping and limiting sinking tables to hoop the module B to form a module C; the second heat dissipation holes are formed in the support and are aligned with the square shell battery cells, the cavity is formed in the support to contain the aluminum row, the fixing clip is arranged on the support to fix the aluminum row, the aluminum row is installed on the support to form a module D, the module D is installed on the module C to form an end plate type square shell battery cell module E, and the aluminum row comprises linkage holes used for being linked with the installation holes. The structure improves reliability and installation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to an end plate type square shell battery core module. Background Art

[0002] Battery packs are an important component of new energy technology, providing energy and power for the storage of new energy vehicles. However, due to the low energy density of battery packs, the vehicle's range is limited. How to improve the energy density of battery packs has become an important topic at present. Usually, square shell battery cell modules are generally assembled in the form of a combination of steel strips and cast metal end plates. However, metals tend to have high density. If too much metal is used, the weight of the module and the entire battery pack will increase. The existing technology uses plastic end plates, which brings problems with installation reliability and safety.

[0003] The above information disclosed in the background technology section is only used to enhance understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0004] The purpose of the utility model is to provide an end plate type square shell battery core module, which can improve reliability and installation efficiency.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] The utility model provides an end plate type square shell battery core module comprising:

[0007] Multiple square shell battery cells are stacked and arranged with double-sided structural adhesive layers between adjacent square shell battery cells to form module A;

[0008] A pair of end plates, which are provided at both ends of the module A to form module B, the end plates comprising:

[0009] Mounting holes are provided on the top of the end plate to mount the aluminum bars.

[0010] A first heat dissipation hole is provided on the end plate to dissipate heat,

[0011] The clamping and limiting sink is recessed in the end plate to limit the steel belt.

[0012] A steel belt, which cooperates with the tightening and limiting sink to clamp the module B to form module C;

[0013] A bracket comprising:

[0014] The second heat dissipation hole is provided on the bracket and aligned with the square shell battery cell.

[0015] A cavity is provided in the bracket to accommodate the aluminum bar,

[0016] A fixing clip is provided on the bracket to fix the aluminum bar.

[0017] An aluminum busbar is installed on the bracket to form a module D, and the module D is installed on the module C to form an end-plate square shell battery module E, wherein the aluminum busbar includes a connecting hole for connecting the mounting hole.

[0018] In the end plate type square shell battery cell module, the end plate also includes a pre-tightening force application hole, which is provided on the end plate to cooperate with an external pre-tightening force device to pre-tighten the square shell battery cell and the end plate. The pre-tightening force application hole is provided with a lifting rib for lifting.

[0019] In the end plate type square shell battery cell module, the end plate further includes a placement groove, which is provided on the end plate for placing the wiring harness.

[0020] In the end plate type square shell battery module, the end plate further includes a mounting sink, which is recessed in the end plate to mount the lead-out end of the heating film.

[0021] In the end plate type square shell battery cell module, fixing ribs for limiting the aluminum row are provided in the cavity.

[0022] In the end plate type square shell battery cell module, the bracket further includes a pre-installation positioning portion, which is provided on the bracket to install and position the FPC board.

[0023] In the end plate type square shell battery cell module, the aluminum bars also include positive and negative aluminum bars.

[0024] In the end plate type square shell battery cell module, the positive and negative aluminum bars further include breaks at the bends.

[0025] In the end plate type square shell battery cell module, the bracket includes two rows of parallel cavities.

[0026] In the end plate type square shell battery cell module, the end plate type square shell battery cell module has a symmetrical structure.

[0027] In the above-mentioned technical solution, the utility model provides an end-plate square-shell battery cell module with the following beneficial effects: it effectively integrates the square-shell battery cells, reducing weight while further reducing mold costs. The steel belt tightening sink, the heat dissipation holes of the battery cells, and the reinforcement and lifting structures effectively dissipate heat from the battery cells and improve assembly convenience. This module facilitates the installation and welding of copper busbars. Before welding the aluminum busbars, all aluminum busbars are pre-fixed on the bracket, which improves the welding reliability of all aluminum busbars and reduces the time required to arrange the aluminum busbars on the battery cell tabs, saving time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0029] Figure 1 This is a schematic diagram of the structure of a square shell battery cell steel strip module assembly with end plates referred to in the present invention.

[0030] Figure 2 This is a schematic diagram of the battery cell stacking structure referred to in this utility model.

[0031] Figure 3 This is a schematic structural diagram of the module A after stacking the battery cells referred to in the present invention.

[0032] Figure 4 This is a structural diagram of module A after stacking battery cells and module B after extrusion of plastic end plates referred to in the present invention.

[0033] Figure 5 This is a schematic diagram of the end plate structure with a lightweight structure referred to in the present utility model.

[0034] Figure 6 This is a schematic diagram of the structure of module C after the steel belt and module B are installed.

[0035] Figure 7 This is a schematic diagram of the bracket structure for pre-installing the aluminum bar referred to in the present invention.

[0036] Figure 8 This is a structural diagram of the aluminum bar pre-installed bracket and the aluminum bar fixed module D referred to in the present invention.

[0037] Figure 9 This is a structural diagram of module E after welding module D and module C referred to in the present invention.

[0038] The reference numerals in the figure are as follows: end plate 1, steel strip 2, square shell battery cell 3, bracket 4, aluminum bar 5, double-sided structural adhesive layer 6, lifting rib 1-1, mounting hole 1-2, placement groove 1-3, mounting sink 1-4, clamping limit sink 1-5, pre-tightening force application hole 1-6, first heat dissipation hole 1-7, top heat dissipation hole 4-1, cavity 4-2, fixing rib 4-3, 4-6, second heat dissipation hole 4-4, pre-installation positioning 4-5, fixing clip 4-7, middle aluminum bar 5-1, connection hole 5-1-1, side 5-1-2, positive and negative aluminum bar 5-2, linking hole 5-2-1. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0044] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] like Figure 1-9 As shown, in one embodiment, an end plate type square shell battery cell module of the present invention includes:

[0048] A plurality of square shell battery cells 3 are stacked and arranged, with a double-sided structural adhesive layer 6 provided between adjacent square shell battery cells 3 to form a module A;

[0049] A pair of end plates 1, which are provided at both ends of the module A to form module B, the end plates 1 include:

[0050] Mounting holes 1-2 are provided on the top of the end plate 1 to mount the aluminum bar.

[0051] The first heat dissipation hole 1-7 is provided on the end plate 1 to dissipate heat.

[0052] The clamping and limiting sink 1-5 is recessed in the end plate 1 to limit the steel belt 2.

[0053] Steel belt 2, which cooperates with the tightening and limiting sinks 1-5 to clamp the module B to form module C;

[0054] The bracket 4 includes:

[0055] The second heat dissipation hole is provided on the bracket 4 and aligned with the square shell battery cell 3.

[0056] The cavity is provided in the bracket 4 to accommodate the aluminum bar.

[0057] Fixing clips 4-7 are provided on the bracket 4 to fix the aluminum bar.

[0058] An aluminum bar is mounted on the bracket 4 to form a module D, and the module D is mounted on the module C to form an end plate 1-type square shell battery cell 3 module E, wherein the aluminum bar includes a connecting hole 5-2-1 for connecting the mounting hole.

[0059] In the end plate type square shell battery cell module, the end plate 1 also includes a pre-tightening force application hole 1-6, which is provided on the end plate 1 to cooperate with an external pre-tightening force device to pre-tighten the square shell battery cell 3 and the end plate 1. The pre-tightening force application hole 1-6 is provided with a lifting rib 1-1 for lifting.

[0060] In the end plate type square shell battery cell module, the end plate 1 further includes placement grooves 1-3, which are provided on the end plate 1 for placing the wiring harness.

[0061] In the end plate type square shell battery module, the end plate 1 further includes a mounting sink 1-4, which is recessed in the end plate 1 to mount the lead-out end of the heating film.

[0062] In the end plate type square shell battery cell module, fixing ribs for limiting the aluminum row are provided in the cavity.

[0063] In the end plate type square shell battery module, the bracket 4 also includes pre-installation positioning parts 4-5, which are arranged on the bracket 4 to install and position the FPC board.

[0064] In the end plate type square shell battery cell module, the aluminum bars also include positive and negative aluminum bars.

[0065] In the end plate type square shell battery cell module, the positive and negative aluminum bars further include breaks at the bends.

[0066] In the end plate type square shell battery module, the bracket 4 includes two rows of parallel cavities.

[0067] In the end plate type square shell battery cell module, the end plate 1 type square shell battery cell 3 module is a symmetrical structure.

[0068] In one embodiment, an end plate type square shell battery cell module includes:

[0069] A plurality of square shell battery cells 3 are stacked and arranged, with a double-sided structural adhesive layer 6 provided between adjacent square shell battery cells 3 to form a module A;

[0070] A pair of end plates 1, which are provided at both ends of the module A to form module B, the end plates 1 include:

[0071] The pre-tightening force application hole 1-6 is provided on the end plate 1 to cooperate with the external pre-tightening force device to pre-tighten the square shell battery cell 3 and the end plate 1. The pre-tightening force application hole 1-6 is provided with a hoisting rib 1-1 for hoisting.

[0072] Mounting holes 1-2 are provided on the top of the end plate 1 to mount the aluminum bar.

[0073] Placement grooves 1-3, which are provided on the end plate 1 to place the wiring harness,

[0074] Install the sink 1-4, which is recessed in the end plate 1 to install the lead-out end of the heating film.

[0075] The clamping and limiting sink 1-5 is recessed in the end plate 1 to limit the steel belt 2.

[0076] The first heat dissipation hole 1-7 is provided on the end plate 1 to dissipate heat.

[0077] Steel belt 2, which cooperates with the tightening and limiting sinks 1-5 to clamp the module B to form module C;

[0078] The bracket 4 includes:

[0079] The second heat dissipation hole is provided on the bracket 4 and aligned with the square shell battery cell 3.

[0080] The cavity is provided in the bracket 4 to accommodate the aluminum bar, and the cavity is provided with a fixing rib for limiting the aluminum bar.

[0081] Fixing clips 4-7 are provided on the bracket 4 to fix the aluminum bar.

[0082] Pre-installation positioning parts 4-5, which are provided on the bracket 4 to install and position the FPC;

[0083] An aluminum bar is mounted on the bracket 4 to form a module D, and the module D is mounted on the module C to form an end plate 1-type square shell battery cell 3 module E, wherein the aluminum bar includes a connecting hole 5-2-1 for connecting the mounting hole.

[0084] In one embodiment, Figure 1 As shown, an end plate type square shell battery cell steel strip module includes an end plate 1, a steel strip 2, a square shell battery cell 3, a bracket 4, an aluminum busbar 5, and a double-sided adhesive layer 6 between the battery cells. Furthermore, by adding a double-sided structural adhesive layer 6 between the square shell battery cells 3, the battery cells are stacked into a module A, as shown in FIG. Figure 2 , as shown in 3. Furthermore, by designing a lightweight plastic end plate 1, pre-installed pre-tightening force application holes 1-6 are designed on the end plate 1, and the external pre-tightening force device is applied to the pre-tightening force application holes 1-6, the module A and the end plate 1 are formed into a module B, as shown in FIG. Figure 45, further, a lifting rib 1-1 is designed on the preload application hole 1-6. After the module is formed, the entire module can be lifted by hooking this part with a hook; further, an aluminum bar mounting hole 1-2 is designed on the top of the end plate 1, which reduces the use of an aluminum bar mounting bracket and saves costs; because the plastic part itself has an insulating function, the positive and negative aluminum bars are directly installed on the end plate, which can realize the transmission of the battery current outward through the positive and negative aluminum bars; the utility model also designs a wiring harness placement groove 1-3, so that the wiring harness can be placed in the groove, which can effectively protect the wiring harness from being damaged during the vibration of the module / battery pack, and effectively ensure the installability of the entire module / battery pack. At the same time, a mounting sink 1-4 for the lead-out terminal of the heating film is also designed, which can also ensure that the lead-out terminal of the heating film is not damaged during the extrusion test. Furthermore, the present invention also designs a clamping and limiting sink 1-5 for the steel belt 2, which effectively confines the steel belt 2 within the range of the sink, preventing the steel belt 2 from moving up and down. Furthermore, to ensure heat dissipation of the entire battery cell, the present invention also designs first heat dissipation holes 1-7 on the upper and lower parts of the end plate, which effectively dissipate heat from the battery cell and extend the life of the battery cell.

[0085] Furthermore, in order to ensure the reliability of assembly during the process, the present invention also designs a plastic bracket 4, which has the function of gathering the aluminum bars 5, and can gather the aluminum bars 5 on the bracket in advance, so as to prevent the aluminum bars 5 from being placed one by one during the module welding process, thereby saving work time; this method can support the plastic bracket and aluminum bar assembly module D directly on the upper part of the module C, which is simple and convenient to operate; the entire module D is welded to the module C by welding to form a module E; further, a second heat dissipation hole 4-4 is designed on the bracket 4, and the top heat dissipation hole 4-4 of the battery cell is used in conjunction with the first heat dissipation hole 1-7 on the end plate 1 to further improve the consistency of the battery cell temperature; further, a cavity 4-2 for accommodating the aluminum bar 5 is also designed on the bracket 4, and the cavity 4-2 is hollowed out. While accommodating the aluminum bar, it also has It has the function of reducing weight; further, in order to effectively fix the aluminum busbar 5, fixing ribs 4-3 and 4-6 are designed on the cavity side, which can effectively pre-fix all the intermediate aluminum busbars 5-1 on the cavity 4-2, and the intermediate aluminum busbar 5-1 is provided with a connecting hole 5-1-1 and a side 5-1-2; further, a pre-installation positioning 4-5 is also designed for subsequent FPC installation and positioning; fixing clips 4-7 of the positive and negative aluminum busbars 5-2 are designed on both sides of the plastic bracket 4 for fixing the positive and negative aluminum busbars 5-2, and further, connection holes 5-2-1 with external copper busbars are designed on the positive and negative aluminum busbars 5-2 for connection and fixation with the mounting holes 1-2 on the end plate 1, and further, in order to ensure that there is no local stress at the bending point when the positive and negative aluminum busbars 5-2 are bent, a break 5-2-2 is also designed to effectively avoid stress concentration at the bending point.

[0086] Finally, it should be noted that the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of this application.

[0087] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An end plate type square shell battery cell module, characterized in that: It includes, Multiple square shell battery cells are stacked and arranged with double-sided structural adhesive layers between adjacent square shell battery cells to form module A; A pair of end plates, which are provided at both ends of the module A to form module B, the end plates comprising: Mounting holes are provided on the top of the end plate to mount the aluminum bars. A first heat dissipation hole is provided on the end plate to dissipate heat, The clamping and limiting sink is recessed in the end plate to limit the steel belt. A steel belt, which cooperates with the tightening and limiting sink to clamp the module B to form module C; A bracket comprising: The second heat dissipation hole is provided on the bracket and aligned with the square shell battery cell. A cavity is provided in the bracket to accommodate the aluminum bar, A fixing clip is provided on the bracket to fix the aluminum bar. An aluminum busbar is installed on the bracket to form a module D, and the module D is installed on the module C to form an end-plate square shell battery module E, wherein the aluminum busbar includes a connecting hole for connecting the mounting hole.

2. The end plate type square shell battery cell module according to claim 1, characterized in that: The end plate also includes a pre-tightening force application hole, which is provided on the end plate to cooperate with an external pre-tightening force device to pre-tighten the square shell battery cell and the end plate. The pre-tightening force application hole is provided with a lifting rib for lifting.

3. The end plate type square shell battery module according to claim 1, characterized in that: The end plate further includes a placement groove, which is provided on the end plate for placing the wire harness.

4. The end plate type square shell battery cell module according to claim 1, characterized in that: The end plate further comprises a mounting sink, which is recessedly arranged on the end plate for mounting the lead-out end of the heating film.

5. The end plate type square shell battery cell module according to claim 1, characterized in that: The cavity is provided with fixing ribs for limiting the aluminum row.

6. The end plate type square shell battery cell module according to claim 1, characterized in that: The bracket further comprises a pre-installation positioning portion, which is arranged on the bracket to install and position the FPC board.

7. The end plate type square shell battery cell module according to claim 1, characterized in that: The aluminum busbars also include positive and negative aluminum busbars.

8. The end plate type square shell battery cell module according to claim 7, characterized in that: The positive and negative aluminum bars also include breaks at the bends.

9. The end plate type square shell battery cell module according to claim 1, characterized in that: The support comprises two rows of parallel cavities.

10. The end plate type square shell battery cell module according to claim 1, characterized in that: The end plate type square shell battery cell module has a symmetrical structure.

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