Stacked battery module structure and energy storage battery

Abstract

This disclosure provides a stacked battery module structure, which includes a flexible connection assembly and multiple battery modules. Each battery module consists of a cell assembly, a cell support, and conductive metal tabs. The cell assembly is fixed within the cell support, and the conductive metal tabs are welded to the tabs of the cell assembly. The flexible connection assembly includes a main connector, individual cell connectors, and tab connectors. The tab connectors connect the conductive metal tabs of adjacent battery modules, realizing series connection of the battery modules. One end of the individual cell connector is connected to the main connector, and the other end is welded to the tab connector, forming multiple voltage sampling branches. This structure integrates voltage sampling points into the series welding process, replacing the traditional steps of connecting battery modules in series and welding voltage sampling points separately. This reduces the number of battery module welding operations, lowers the risk of errors during welding, and thus improves the production efficiency of the stacked battery module structure.

Description

Technical Field

[0001] This disclosure relates to the technical field of secondary batteries, and in particular to a stacked battery module structure and an energy storage battery. Background Technology

[0002] In the field of secondary battery technology, stacked battery modules are becoming increasingly widely used due to their unique advantages. However, in the current battery module manufacturing process, the pressing and series connection processes are independent of each other. The process requires connecting the tabs of two adjacent battery modules by welding to form a complete series battery pack.

[0003] Subsequently, voltage sampling points are individually arranged for each group of batteries in the battery pack, and these sampling points are connected to the voltage acquisition circuit by manual soldering to achieve effective voltage acquisition and monitoring. However, traditional soldering methods require step-by-step soldering of the series connection and voltage sampling points, and involve multiple manual soldering processes, which increases the risk of errors during soldering, thereby reducing production efficiency and increasing the production cost of the battery module. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a stacked battery module structure and energy storage battery that integrates series and pressure sampling functions.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A stacked battery module structure includes a flexible connection component and multiple battery components. Each battery component is arranged adjacent to at least one battery component. Each battery component includes a cell group, a cell support, and a conductive metal tab. The cell group is fixed in the cell support, and each conductive metal tab is welded to the tab of the corresponding cell group.

[0007] The flexible connection assembly includes a main connector, multiple individual connectors and multiple tab connectors. Each pair of adjacent conductive metal tabs is connected to a tab connector. One end of each individual connector is connected to the main connector, and the other end of each individual connector is welded to a tab connector.

[0008] In one embodiment, a plurality of the battery components are connected in series with each other.

[0009] In one embodiment, the main connector is attached to one side of the plurality of battery components, and the length direction of the main connector is consistent with the series arrangement direction of the plurality of battery components.

[0010] In one embodiment, the length extension direction of the single connector is perpendicular to the length extension direction of the main connector.

[0011] In one embodiment, a plurality of the individual connectors are equally spaced on one side of the battery assembly.

[0012] In one embodiment, the tab connector covers the conductive metal part of the tab.

[0013] In one embodiment, a plurality of the battery components are connected side by side in sequence.

[0014] In one embodiment, the battery assembly further includes a cell assembly fixing member that protrudes from the cell support adjacent to the end face of the cell assembly.

[0015] In one embodiment, the battery cell assembly fixing member has a connector limiting groove, and the main connector is disposed in the connector limiting groove.

[0016] This application also provides an energy storage battery, including the stacked battery module structure described in any embodiment.

[0017] Compared with the prior art, this disclosure has at least the following advantages:

[0018] 1. The above-mentioned stacked battery module structure is connected to one end of multiple individual unit connectors through the main body connectors. The other end of each individual unit connector is welded to a corresponding tab connector to form multiple voltage sampling branches. Furthermore, each tab connector connects to the conductive metal tabs of two adjacent battery modules, thereby realizing the series connection between battery modules. At the same time, by welding the individual unit connectors to the tab connectors, the voltage sampling points are integrated into the series welding process, replacing the two separate welding processes of series connection of battery modules and voltage sampling points in the traditional process. This reduces the number of battery module welding operations, lowers the risk of errors during welding, and thus improves the production efficiency of the stacked battery module structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a stacked battery module structure according to one embodiment;

[0021] Figure 2 for Figure 1 A partial exploded view of the stacked battery module structure shown;

[0022] Figure 3 for Figure 1 Another exploded view of the stacked battery module structure shown.

[0023] Reference numerals: 10-Layered battery module structure; 100-Flexible connection component; 110-Main body connector; 120-Single cell connector; 130-Taper connector; 200-Battery assembly; 210-Cell assembly; 220-Cell support; 230-Taper conductive metal part; 240-Cell assembly fixing part; 2401-Connector limiting groove. Detailed Implementation

[0024] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0028] like Figures 1 to 3As shown, an embodiment of the stacked battery module structure 10 disclosed herein includes a flexible connection component 100 and a plurality of battery components 200. Each battery component 200 is disposed adjacent to at least one battery component 200. Each battery component 200 includes a cell group 210, a cell support 220 and a tab conductive metal part 230. The cell group 210 is fixed in the cell support 220, and each tab conductive metal part 230 is welded to the tab of the corresponding cell group 210.

[0029] The flexible connection assembly 100 includes a main connector 110, multiple individual connectors 120 and multiple tab connectors 130. A tab connector 130 is connected to any two adjacent conductive metal parts 230. One end of each individual connector 120 is connected to the main connector 110, and the other end of each individual connector 120 is welded to a tab connector 130.

[0030] In this embodiment, firstly, multiple battery modules 200 are arranged in a stacked series. The conductive metal tabs 230 are welded to the positive and negative tab ends of the cell assembly 210 and extend to the outside of the cell support 220. Then, since one end of each individual connector 120 is connected to the main connector 110 and the other end is welded to the tab connector 130, and the tab connector 130 welds the conductive metal tabs 230 of any two adjacent battery modules 200, the series connection between different battery modules 200 is realized through multiple individual connectors 120. At the same time, the individual connectors 120 in the flexible connection assembly 100 can collect the voltage of the battery module connected to the tab connector 130, thereby enabling the stacked battery module structure 10 to realize the series connection and voltage sampling of multiple battery modules 200 through the flexible connection assembly 100.

[0031] The aforementioned stacked battery module structure 10 is connected to one end of multiple individual connectors 110 via main connectors 120. The other end of each individual connector 110 is welded to a corresponding tab connector 130 to form multiple voltage sampling branches. Each tab connector 130 connects to the tab conductive metal parts 230 of two adjacent battery modules 200, thereby realizing series connection between battery modules. At the same time, by welding the individual connectors 120 and the tab connectors 130, the voltage sampling points are integrated into the series welding process, replacing the two separate welding processes of series connection of battery modules 200 and voltage sampling points in the traditional process. This reduces the number of battery module welding operations, lowers the risk of errors during welding, and thus improves the production efficiency of the stacked battery module structure 10.

[0032] like Figure 2 and Figure 3As shown, in one embodiment, multiple battery modules 200 are connected in series. In this embodiment, the cross-sections of each battery module 200 are aligned and stacked sequentially according to a predetermined stacking order, which helps optimize the current path and ensures that the conductive metal tabs 230 between adjacent battery modules 200 are accurately aligned, thereby facilitating the voltage sampling operation of the battery module. Specifically, when multiple battery modules 200 are stacked, the conductive metal tabs 230 of two adjacent battery modules 200 form a stable electrical connection through the tab connector 130. At this time, one end of the individual connector 120 in the flexible connection assembly 100 is welded to the main connector 110, and the other end is welded to the tab connector 130, thereby connecting the entire stacked battery module in series into a complete circuit system.

[0033] like Figure 2 and Figure 3 As shown, in one embodiment, the main connector 110 is attached to one side of the plurality of battery modules 200, and the length direction of the main connector 110 is consistent with the series arrangement direction of the plurality of battery modules 200. In this embodiment, the length direction of the main connector 110 is consistent with the series arrangement direction of the battery modules 200, so that the current can flow along the shortest path in the stacked battery module, reducing the path length and the number of bends of the current, thereby reducing resistance loss and improving energy transfer efficiency. In addition, the length direction of the main connector 110 is consistent with the arrangement direction of the battery modules 200, so that the welding points of the individual connectors 120 can be evenly distributed along the length direction of the main connector 110, which is beneficial for automated welding equipment to quickly complete the welding operation along a predetermined trajectory, thereby improving the welding efficiency of the stacked battery module structure 10.

[0034] like Figure 2 and Figure 3 As shown, in one embodiment, the length extension direction of the individual connector 120 is perpendicular to the length extension direction of the main connector 110. In this embodiment, one end of the individual connector 120 is welded to the main connector 110, and the other end extends to the tab connector 130, forming a reliable electrical connection thereto. Because the extension direction of the individual connector 120 is perpendicular to the main connector 110, the individual connectors 120 can be evenly distributed from different sides of the main connector 110, thereby optimizing the space occupancy of the stacked battery module structure 10. Because the extension direction of the individual connector 120 is perpendicular to the main connector 110, the welding points can be evenly distributed on the sidewalls of the stacked battery module, which is beneficial for the stacked battery module structure 10 to form a stable electrical connection network. In addition, due to the vertical extension design of the individual connector 120, the access points of external devices can be arranged more flexibly, which is beneficial for the stacked battery module structure 10 to perform voltage sampling.

[0035] like Figure 2 and Figure 3 As shown, in one embodiment, multiple individual connectors 120 are evenly spaced on one side of the battery assembly 200. In this embodiment, during the assembly of the stacked battery module, the multiple individual connectors 120 are evenly distributed on one side of the battery assembly 200 according to a pre-set spacing. This helps to maintain the precise position of each individual connector 120. Furthermore, since the individual connectors 120 are evenly spaced, it is convenient for the individual connectors 120 to be welded to the tab connectors 130 by automated welding equipment, and the welding points can be evenly distributed on the main connector 110. This ensures that a reliable electrical connection is formed between each individual connector 120 and the corresponding tab connector 130, facilitating voltage sampling.

[0036] like Figure 2 and Figure 3 As shown, in one embodiment, the tab connector 130 covers the tab conductive metal part 230. In this embodiment, when the tab connector 130 covers the tab conductive metal part 230, a tight contact surface is formed between the tab connector 130 and the tab conductive metal part 230, ensuring smooth current transmission and reducing the contact resistance between them, thereby improving the efficiency of the electrical connection. At the same time, it avoids thermal stress and welding defects that may be generated during the welding process, thus making the connection between the tab connector 130 and the tab conductive metal part 230 more stable and reliable.

[0037] like Figure 2 and Figure 3 As shown, in one embodiment, multiple battery modules 200 are connected side-by-side sequentially. In this embodiment, during the assembly of the stacked battery module, multiple battery modules 200 are arranged on the same plane with their cross-sections aligned, and stacked along the length extension direction of the individual connector 120. One end of each individual connector 120 is welded to the main connector 110, and the other end is welded to multiple tab connectors 130, so that the individual connector 120 simultaneously forms an electrical connection with the tab connectors 130 of multiple battery modules 200, thereby realizing the parallel connection between the battery modules 200. This allows the individual connector 120 to not only connect the battery modules 200 arranged along the length extension direction of the main connector 110 in series, but also connect the battery modules 200 along the length extension direction of the individual connector 120 in parallel, thus realizing the integration of the series and parallel connection functions of the battery modules 200.

[0038] like Figure 2As shown, in one embodiment, the battery assembly 200 further includes a cell assembly fixing member 240, which protrudes from the cell support 220 adjacent to the end face of the cell assembly 210. In this embodiment, the cell assembly fixing member 240 protrudes from the cell support 220 adjacent to the end face of the cell assembly 210, and through the protruding structure, contacts the end face of the cell assembly 210, forming a stable support and fixation. This allows the cell assembly 210 to be quickly and accurately positioned during installation, avoiding offset or misalignment caused by manual operation. Furthermore, the protruding portion of the cell assembly fixing member 240 fits tightly against the end face of the cell assembly 210, effectively limiting the displacement space of the cell assembly 210, thereby ensuring the relative positional stability of the cell assembly 210 with other components, preventing loosening of connections due to vibration or external forces, and thus enhancing the overall stability of the stacked battery module.

[0039] like Figure 2 As shown, in one embodiment, the cell assembly fixing member 240 has a connector limiting groove 2401, and the main connector 110 is disposed within the connector limiting groove 2401. In this embodiment, the main connector 110 is precisely fixed by the connector limiting groove 2401 on the cell assembly fixing member 240, and the shape and size of the limiting groove match those of the main connector 110, ensuring that the main connector 110 can be quickly and accurately positioned and fixed within the limiting groove, thereby reducing manual operation errors and improving assembly efficiency. Since the main connector 110 is disposed within the connector limiting groove 2401, the fixing effect of the limiting groove ensures the stability of the flexible connection assembly 100, thereby effectively preventing structural loosening or displacement caused by vibration or external force.

[0040] This application also provides an energy storage battery, including a stacked battery module structure 10 according to any embodiment. In this embodiment, firstly, multiple battery components 200 are arranged in a stacked series, and conductive metal tabs 230 are welded to the positive and negative tab ends of the cell assembly 210 and extend to the outside of the cell support 220. Then, since one end of each individual connector 120 is connected to the main connector 110 and the other end is welded to the tab connector 130, and the tab connector 130 welds the conductive metal tabs 230 of any two adjacent battery components 200, the series connection between different battery components 200 is realized through multiple individual connectors 120. At the same time, the individual connectors 120 in the flexible connection assembly 100 can collect the voltage of the battery module connected to the tab connector 130, thereby enabling the stacked battery module structure 10 to realize the series connection and voltage sampling of multiple battery components 200 through the flexible connection assembly 100. The aforementioned stacked battery module structure 10 is connected to one end of multiple individual connectors 110 via main connectors 120. The other end of each individual connector 110 is welded to a corresponding tab connector 130 to form multiple voltage sampling branches. Each tab connector 130 connects to the tab conductive metal parts 230 of two adjacent battery modules 200, thereby realizing series connection between battery modules. At the same time, by welding the individual connectors 120 and the tab connectors 130, the voltage sampling points are integrated into the series welding process, replacing the two separate welding processes of series connection of battery modules 200 and voltage sampling points in the traditional process. This reduces the number of battery module welding operations, lowers the risk of errors during welding, and thus improves the production efficiency of the stacked battery module structure 10.

[0041] Compared with the prior art, this disclosure has at least the following advantages:

[0042] 1. The aforementioned stacked battery module structure 10 is connected to one end of multiple individual connectors 110 via main connectors 120. The other end of each individual connector 110 is welded to a corresponding tab connector 130 to form multiple voltage sampling branches. Each tab connector 130 connects to the tab conductive metal parts 230 of two adjacent battery modules 200, thereby realizing series connection between battery modules. At the same time, by welding the individual connectors 120 and the tab connectors 130, the voltage sampling points are integrated into the series welding process, replacing the two separate welding processes of series connection of battery modules 200 and voltage sampling points in the traditional process. This reduces the number of battery module welding operations, lowers the risk of errors during welding, and thus improves the production efficiency of the stacked battery module structure 10.

[0043] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A stacked battery module structure, comprising a flexible connection assembly and a plurality of battery modules, each battery module being disposed adjacent to at least one other battery module, each battery module comprising a cell assembly, a cell support, and conductive metal tabs, wherein the cell assembly is fixed within the cell support, and each conductive metal tab is welded to a corresponding tab of the cell assembly, characterized in that, The flexible connection assembly includes a main connector, multiple individual connectors and multiple tab connectors. Each pair of adjacent conductive metal tabs is connected to a tab connector. One end of each individual connector is connected to the main connector, and the other end of each individual connector is welded to a tab connector.

2. The stacked battery module structure of claim 1, wherein Multiple battery modules are connected in series with each other.

3. The stacked battery module structure of claim 2, wherein The main connector is attached to one side of the plurality of battery components, and the length direction of the main connector is consistent with the series arrangement direction of the plurality of battery components.

4. The stacked battery module structure of claim 1, wherein The length extension direction of the single connector is perpendicular to the length extension direction of the main connector.

5. The stacked battery module structure of claim 1, wherein Multiple individual connectors are equally spaced on one side of the battery assembly.

6. The stacked battery module structure of claim 1, wherein The electrode connector is covered by the conductive metal part of the electrode.

7. The stacked battery module structure of claim 1, wherein Multiple battery components are connected side by side in sequence.

8. The stacked battery module structure of claim 1, wherein, The battery assembly also includes a cell assembly fixing member, which protrudes from the cell support adjacent to the end face of the cell assembly.

9. The stacked battery module structure of claim 8, wherein, The battery cell assembly fixing component has a connector limiting groove, and the main connector is disposed within the connector limiting groove.

10. An energy storage cell, characterized by Including the stacked battery module structure as described in any one of claims 1 to 9.

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