Cylindrical module connecting structure
By using a single-sided connection design and a cylindrical module connection structure with graphene heat sinks, the problems of low space utilization, high connection complexity, difficult thermal management, and limited scalability of traditional cylindrical battery modules are solved, achieving efficient and low-cost battery module management and maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CENT POWER TECH
- Filing Date
- 2025-04-23
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional cylindrical battery modules suffer from low space utilization, high connection complexity, difficult thermal management, inconvenient maintenance, high maintenance costs, and limited scalability.
It adopts a single-sided connection design, realizes the series and parallel connection of battery cells through connecting plates, and uses graphene heat sinks for thermal management. It combines standardized interfaces and flexible contacts or slots to achieve quick electrical connection, and uses carbon fiber reinforced frame fixing sleeves and straps for fixation.
It increases energy density by 15%-20%, reduces temperature rise by 8℃-12℃, reduces the number of connectors and material waste, lowers total cost by 30%, supports rapid assembly and disassembly, improves yield to over 99%, and has strong scalability.
Smart Images
Figure CN224318568U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of communication backup power technology, and in particular to a cylindrical module connection structure. Background Technology
[0002] Compared to prismatic modules, cylindrical modules have lower integration, requiring continuous optimization of the module's structural design through improved pack materials, resulting in higher costs. Traditional cylindrical battery modules typically employ multi-faceted connection designs, leading to structural redundancy, occupying additional space, low space utilization, and reduced energy density. Furthermore, traditional cylindrical battery modules generally use multi-directional welding or mechanical connections, resulting in high connection complexity, requiring multiple steps, increasing manufacturing difficulty and cost, and raising the risk of failure. Due to the dispersed connection points, significant differences in local resistance occur, making thermal management difficult and prone to hot spots, thus affecting battery life and safety. In addition, replacing individual cells is inconvenient, requiring disassembly of multiple connection structures, which is time-consuming and can easily damage surrounding components. Due to the fixed connection design, it is difficult to flexibly adjust series and parallel configurations, resulting in poor adaptability to different voltage / capacity requirements and limited scalability. Utility Model Content
[0003] Based on this, the present invention provides a cylindrical module connection structure, which aims to solve the problems of low space utilization, high connection complexity, difficult thermal management, inconvenient maintenance, high maintenance cost and limited expandability of traditional cylindrical battery modules.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a cylindrical module connection structure, comprising a top cover, a battery module, a housing, and a panel; the battery module is disposed within the housing, the panel is disposed at one end of the housing, and the top cover covers the top of the housing; the battery module comprises several battery module units arranged in parallel, and baffles are provided between adjacent battery module units;
[0005] Each of the battery module units includes a first fixing sleeve, several battery units, and a second fixing sleeve. One end of each battery unit is connected to the first fixing sleeve, and the other end is connected to the second fixing sleeve. On the end face near one end of the second fixing sleeve, the several battery units are electrically connected by multiple connecting pieces.
[0006] In a preferred embodiment, the electrical connection includes a series connection or a parallel connection.
[0007] In a preferred embodiment, on the end face near one end of the second fixing sleeve, among the several battery cells, battery cells with different polarities are connected in series through the connecting piece, and battery cells with the same polarity are connected in parallel through the connecting piece.
[0008] In a preferred embodiment, each battery cell has a first standardized interface on its end face near the second fixing sleeve, and the series connection or the parallel connection is achieved through the first standardized interface.
[0009] In a preferred embodiment, the first standardized interface is provided with a flexible contact or a slot, and the series connection / parallel connection is achieved through the flexible contact or the slot.
[0010] In a preferred embodiment, a graphene heat sink is embedded in the connecting piece, and the graphene heat sink is in contact with the housing of the battery unit.
[0011] In a preferred embodiment, each connecting piece is provided with a bending allowance at one end near the top cover, and each bending allowance is abutted against the side of the second fixing sleeve; a laser ablation point assembly is provided inside the bending allowance.
[0012] In a preferred embodiment, the first fixing sleeve is provided with a first fixing hole adapted to the battery unit, and the first fixing hole is provided in a one-to-one correspondence with the battery unit; each of the first fixing holes is provided with an inverted "T" shaped hole at the bottom, and the inverted "T" shaped hole is adapted to the battery unit.
[0013] In a preferred embodiment, the second fixing sleeve is provided with a second fixing hole adapted to the battery unit, and the second fixing hole is provided in a one-to-one correspondence with the battery unit; the bottom of each second fixing hole is provided with a first square hole, an elliptical hole and a second square hole, the first square hole and the second square hole are symmetrically arranged on both sides of the elliptical hole, and the first square hole, the elliptical hole and the second square hole are respectively adapted to the battery unit.
[0014] In a preferred embodiment, the battery unit is a cylindrical battery unit; the connecting piece is a connecting aluminum strip; the first fixing sleeve and the second fixing sleeve are both carbon fiber reinforced frame fixing sleeves. In a preferred embodiment, the battery module is provided with at least two straps, the two straps are symmetrically arranged on both sides of the battery module, and each strap surrounds the battery module, and each strap abuts against the baffle.
[0015] In a preferred embodiment, the battery module is further provided with several pressure strips, which are equally spaced on the side of the battery module near the top cover, and the pressure strips are abutted against the straps.
[0016] The beneficial effects achieved by this utility model are as follows: This application effectively reduces the lateral space occupied by a single-sided connection, increasing energy density by 15% to 20%, and is suitable for space-constrained scenarios. Electrical connection can be achieved through insertion, simplifying the welding process, reducing manual intervention, and increasing the yield rate to over 99%. It can support rapid assembly, disassembly, and individual unit replacement, reducing maintenance costs. Embedded thermal management is achieved through heat conduction via heat sinks or microchannels in contact with the shell, optimizing thermal balance, effectively reducing thermal resistance, and reducing measured temperature rise by 8°C to 12°C, thus extending battery cycle life. The structure of this application reduces the number of connectors and material waste, lowering the total cost by approximately 30%, and supports module cascading, easily realizing 100V high-voltage platforms or megawatt-hour energy storage systems. It is flexible in expansion and can be applied to electric vehicles, drone batteries, home energy storage, and industrial robots. While improving performance, it solves the core problems of traditional cylindrical modules, providing a new technical path for high-density energy systems. This application has a simple structure, is easy to assemble and disassemble, and is easy to maintain. It has high practicality and economy, a wide range of applications, and can be produced and used as a general-purpose product. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of the cylindrical module connection structure according to an embodiment of the present invention;
[0019] Figure 2 for Figure 1 An exploded view of the cylindrical module connection structure;
[0020] Figure 3 for Figure 1 A schematic diagram of the internal structure of the cylindrical module connection structure;
[0021] Figure 4 for Figure 3 A schematic diagram of the battery module unit;
[0022] Figure 5 for Figure 4 An exploded view of the battery module unit.
[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.
[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. 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. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0029] Specifically, such as Figures 1 to 5As shown, the present invention proposes the following technical solution: a cylindrical module connection structure, including a top cover 10, a battery module 20, a housing 30, and a panel 40; the battery module 20 is disposed inside the housing 30, the panel 40 is disposed at one end of the housing 30, and the top cover 10 covers the top of the housing 30; the battery module 20 includes several battery module units 21 arranged in parallel, and a baffle 50 is provided between adjacent battery module units 21;
[0030] Each of the battery module units 21 includes a first fixing sleeve 211, several battery units 212 and a second fixing sleeve 213. One end of each battery unit 212 is connected to the first fixing sleeve 211 and the other end is connected to the second fixing sleeve 213. On the end face near the end of the second fixing sleeve 213, several battery units 212 are electrically connected by multiple connecting pieces 60.
[0031] In a preferred embodiment, the electrical connection includes a series connection or a parallel connection.
[0032] In a preferred embodiment, on the end face near one end of the second fixing sleeve 213, among the several battery units 212, battery units 212 with different polarities are connected in series through the connecting piece 60, and battery units 212 with the same polarity are connected in parallel through the connecting piece 60.
[0033] In a preferred embodiment, each battery cell 212 is provided with a first standardized interface 2121 on the end face near the second fixing sleeve 213, and the series connection or the parallel connection is realized through the first standardized interface 2121.
[0034] In a preferred embodiment, the first standardized interface 2121 is provided with a flexible contact (not shown in the figure) or a slot (not shown in the figure), and the series connection / parallel connection is realized through the flexible contact or the slot. This configuration allows for electrical connection simply by insertion, simplifies the welding process, supports rapid assembly, disassembly, and individual unit replacement, reduces maintenance costs and manual intervention, and improves the yield rate to over 99%.
[0035] In a preferred embodiment, a graphene heat sink (not shown in the figure) is embedded in the connecting piece 60, and the graphene heat sink is in contact with the housing of the battery unit 212. In this way, heat conduction through the contact between the heat sink and the housing can achieve embedded thermal management, optimize thermal balance, effectively reduce thermal resistance, reduce the measured temperature rise by 8°C to 12°C, and extend the battery cycle life.
[0036] In a preferred embodiment, each connecting piece 60 has a bending allowance 61 at one end near the upper cover 10, and each bending allowance 61 abuts against the side of the second fixing sleeve 213; a laser ablation point assembly (not shown in the figure) is provided inside the bending allowance 61. This configuration allows for the reservation of an adjustable circuit area on the connecting piece, enabling dynamic adjustment of the series-parallel mode through laser ablation or switching components to adapt to energy storage systems with different voltage requirements. It eliminates the need for module redesign, achieving adaptive series-parallel configuration, flexible expansion, reducing the number of connectors and material waste, lowering the total cost by approximately 30%, and supporting module cascading to easily realize a 100-volt high-voltage platform or a megawatt-hour energy storage system.
[0037] In this embodiment, on the end face near one end of the second fixing sleeve, battery cells with different polarities are connected in series via connecting tabs, and battery cells with the same polarity are connected in parallel via connecting tabs. Both series and parallel connections are implemented on the same plane (typically, the top layer is connected in parallel with the same polarity, and the bottom layer is connected in series with the opposite polarity), which can effectively reduce the space occupied laterally. That is, the lateral volume is significantly reduced by single-sided connection, and the energy density is increased by 15%-20%, making it suitable for space-constrained scenarios.
[0038] As a preferred embodiment, such as Figures 4 to 5 As shown, the first fixing sleeve 211 is provided with a first fixing hole 2111 that is adapted to the battery unit 212, and the first fixing hole 2111 is provided in a one-to-one correspondence with the battery unit 212; each of the first fixing holes 2111 has an inverted "T" shaped hole 2112 at the bottom, and the inverted "T" shaped hole 2112 is adapted to the battery unit 212.
[0039] As a preferred embodiment, such as Figures 4 to 5 As shown, the second fixing sleeve 213 is provided with a second fixing hole 2131 adapted to the battery unit 212, and the second fixing hole 2131 is provided one-to-one with the battery unit 212; the bottom of each second fixing hole 2131 is provided with a first square hole 2132, an elliptical hole 2133 and a second square hole 2134, the first square hole 2132 and the second square hole 2134 are symmetrically arranged on both sides of the elliptical hole 2133, and the first square hole 2132, the elliptical hole 2133 and the second square hole 2134 are respectively adapted to the battery unit 212.
[0040] By setting a first square hole, an elliptical hole, and a second square hole, cross-layer serial and parallel connections can be achieved using vias or vertical interconnection technology, effectively reducing the space occupied horizontally.
[0041] In a preferred embodiment, the battery unit 212 is a cylindrical battery unit; the connecting piece 60 is a connecting aluminum strip; and both the first fixing sleeve 211 and the second fixing sleeve 213 are carbon fiber reinforced frame fixing sleeves. This reduces weight and improves vibration resistance, achieving a balance between lightweight and strength.
[0042] In a preferred embodiment, the battery module 20 is provided with at least two straps 70, which are symmetrically arranged on both sides of the battery module 20, and each strap 70 surrounds the battery module 20 and abuts against the baffle 50.
[0043] In a preferred embodiment, the battery module 20 is further provided with several pressure strips 80. These pressure strips 80 are evenly spaced on the side of the battery module 20 near the upper cover 10, and the pressure strips 80 abut against the strapping 70. Through the cooperation of the pressure strips 80, strapping 70, the first fixing sleeve, and the second fixing sleeve, the battery module can be securely fixed and easily disassembled.
[0044] Compared to other traditional structures, this application achieves a highly efficient, compact, and reliable battery module by integrating the battery cell, connecting piece, and fixing sleeve on one side. This allows the battery cell and connecting piece to be directly welded to the battery cell housing after integration, reducing the space occupied by heat dissipation components and the complexity of wiring harnesses, while improving space utilization efficiency. It can be applied to the following scenarios:
[0045] Electric vehicles: Compact modules adapt to chassis space constraints.
[0046] • Drone battery: Lightweight design improves battery life, plug-in maintenance is suitable for field operations.
[0047] • Home energy storage: Modular expansion meets tiered electricity demand and reduces initial investment.
[0048] • Industrial robots and communications: High shock resistance ensures stability during continuous operation.
[0049] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0051] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A cylindrical module connection structure, characterized in that, It includes a top cover, a battery module, a housing, and a panel; the battery module is disposed inside the housing, the panel is disposed at one end of the housing, and the top cover covers the top of the housing; the battery module includes several battery module units arranged in parallel, and a baffle is disposed between adjacent battery module units; Each of the battery module units includes a first fixing sleeve, several battery units, and a second fixing sleeve. One end of each battery unit is connected to the first fixing sleeve, and the other end is connected to the second fixing sleeve. On the end face near one end of the second fixing sleeve, the several battery units are electrically connected by multiple connecting pieces.
2. The cylindrical module connection structure according to claim 1, characterized in that, The electrical connection includes a series connection or a parallel connection.
3. The cylindrical module connection structure according to claim 2, characterized in that, On the end face near one end of the second fixing sleeve, among the several battery cells, battery cells with different polarities are connected in series through the connecting piece, and battery cells with the same polarity are connected in parallel through the connecting piece.
4. The cylindrical module connection structure according to claim 3, characterized in that, Each of the battery cells has a first standardized interface on its end face near the second fixing sleeve, and the series connection or the parallel connection is achieved through the first standardized interface.
5. The cylindrical module connection structure according to claim 4, characterized in that, The first standardized interface is provided with a flexible contact or a slot, and the series connection / parallel connection is realized through the flexible contact or the slot.
6. The cylindrical module connection structure according to claim 1, characterized in that, A graphene heat sink is embedded in the connecting piece, and the graphene heat sink is in contact with the housing of the battery unit.
7. The cylindrical module connection structure according to claim 1, characterized in that, Each of the connecting pieces has a bending allowance at one end near the top cover, and each bending allowance is abutted against the side of the second fixing sleeve; a laser ablation point assembly is provided inside the bending allowance.
8. The cylindrical module connection structure according to claim 1, characterized in that, The first fixing sleeve is provided with a first fixing hole adapted to the battery unit, and the first fixing hole is provided in a one-to-one correspondence with the battery unit; each of the first fixing holes is provided with an inverted "T" shaped hole at the bottom, and the inverted "T" shaped hole is adapted to the battery unit.
9. The cylindrical module connection structure according to claim 1, characterized in that, The second fixing sleeve is provided with a second fixing hole adapted to the battery unit, and the second fixing hole is provided in a one-to-one correspondence with the battery unit; the bottom of each second fixing hole is provided with a first square hole, an elliptical hole and a second square hole, the first square hole and the second square hole are symmetrically arranged on both sides of the elliptical hole, and the first square hole, the elliptical hole and the second square hole are respectively adapted to the battery unit.
10. The cylindrical module connection structure according to claim 1, characterized in that, The battery unit is a cylindrical battery unit; the connecting piece is a connecting aluminum strip; both the first fixing sleeve and the second fixing sleeve are carbon fiber reinforced frame fixing sleeves; The battery module is provided with at least two straps, which are symmetrically arranged on both sides of the battery module, and each strap surrounds the battery module and abuts against the baffle.