Multi-group battery connection structure and battery energy storage system

Abstract

The utility model discloses a multi-group battery connecting structure and a battery energy storage system, and relates to the technical field of batteries. The multi-group battery connecting structure comprises a shell, a plurality of groups of batteries and a plurality of groups of batteries, the plurality of battery cells are arranged in the shell at intervals along a preset direction; the plurality of positive electrode tabs are respectively and correspondingly arranged at one ends of the plurality of battery cells; the plurality of negative tabs are respectively arranged at the other end of the battery cell opposite to the plurality of positive tabs; and the conductive parts are respectively connected with the plurality of positive electrode tabs and the plurality of negative electrode tabs according to a preset sequence. According to the utility model, the problems of low efficiency, higher cost and difficulty in ensuring consistency of formation and capacity grading of traditional multiple groups of batteries which are usually processed by a single controller on equipment are solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a multi-cell battery connection structure and a battery energy storage system. Background Technology

[0002] Currently, formation and capacity grading are two critical steps in battery production. However, traditionally, the formation and capacity grading of multiple battery packs are handled by separate controllers on equipment. This method suffers from low efficiency, high cost, and difficulty in ensuring consistency. No effective solutions have yet been proposed to address these issues. Utility Model Content

[0003] Purpose of the utility model: To provide a multi-battery connection structure and a battery energy storage system, so as to at least solve one of the problems existing in the prior art.

[0004] Technical solution: A multi-cell battery connection structure, comprising:

[0005] A shell;

[0006] Several battery cells are spaced apart within the housing along a predetermined direction;

[0007] Several positive electrode tabs are respectively disposed at one end of several battery cells;

[0008] A plurality of negative electrode tabs are respectively disposed opposite to a plurality of positive electrode tabs at the other end of the battery cell; and

[0009] The conductive component is connected to a plurality of positive electrode tabs and a plurality of negative electrode tabs in a preset order;

[0010] The conductive component enables several battery cells to be in a series connection state and a capacity test state. In the series connection state, the conductive component sequentially and orderly connects the positive and negative electrodes of several battery cells to form a series circuit. In the capacity test state, the conductive component connects the positive and negative electrodes of several battery cells one by one to form a single test and troubleshooting circuit.

[0011] Preferably, a plurality of partition plates are provided at intervals along a predetermined direction inside the housing, and the plurality of partition plates and the housing respectively enclose a plurality of battery cell accommodating cavities.

[0012] Preferably, the positive electrode tab and the negative electrode tab are made of aluminum or nickel.

[0013] Preferably, the conductive component is a nickel strip or a copper strip.

[0014] Preferably, the battery cell has adapter plates at both ends, which are connected to the positive electrode tab and the negative electrode tab respectively.

[0015] Preferably, the battery cell is provided with a connection hole.

[0016] Preferably, the connection hole is connected to the partition plate by a fastener.

[0017] Preferably, the housing is provided with several terminals at both ends.

[0018] Preferably, the terminal is an adjustable connector or a spring connector.

[0019] To achieve the above objectives, according to another aspect of this application, a battery energy storage system is also provided.

[0020] The battery energy storage system according to this application includes multiple battery connection structures as described above.

[0021] Beneficial Effects: In the embodiments of this application, multiple connection structures are adopted to enable several battery cells to be in a series state and a formation and capacity testing state through the conductive components. In the series state, the conductive components sequentially and orderly connect the positive and negative electrodes of several battery cells to form a loop connected end to end. In the formation and capacity testing state, the conductive components connect the positive and negative electrodes of several battery cells one by one to form a single test and troubleshooting loop, achieving the purpose of multiple functions. This realizes the technical effects of improving production efficiency, reducing equipment investment and energy consumption, and solves the technical problems of low efficiency, high cost and difficulty in ensuring consistency in the traditional method of forming and capacity testing of multiple battery groups, which usually uses a separate controller on the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the multi-cell battery connection structure of this utility model; and

[0023] Figure 2 This is a schematic diagram of another multi-battery connection structure of this utility model.

[0024] The attached figures are labeled as follows:

[0025] 10. Shell;

[0026] 20. Battery cells;

[0027] 30. Positive electrode;

[0028] 40. Negative electrode;

[0029] 50. Conductive components;

[0030] 60. Divider. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figure 1-2 As shown, this application relates to a multi-cell battery connection structure and a battery energy storage system. The multi-cell battery connection structure includes a housing 10; the housing 10 serves as the external frame of the entire structure, providing mechanical strength and physical protection; simultaneously, it allows for the assembly of other components, thereby achieving multiple functions. Of course, the material of the housing 10 can be high-strength plastic, aluminum alloy, or other alloys with excellent corrosion resistance, which can improve service life.

[0036] A plurality of battery cells 20 are spaced apart within the housing 10 along a predetermined direction; this ensures that the battery cells 20 have good structural stability, while also facilitating effective heat dissipation and maintenance. The predetermined direction can be either the long or short side of the housing 10, and can be determined according to actual usage requirements.

[0037] A plurality of positive electrode tabs 30 are respectively disposed at one end of a plurality of battery cells 20; the positive electrode tabs 30 are conductive components 50 connecting the positive terminal of the battery and the external circuit, ensuring that the current can be safely and stably discharged from the positive terminal of each battery, reducing current loss.

[0038] A plurality of negative electrode tabs 40 are respectively disposed opposite to a plurality of positive electrode tabs 30 at the other end of the battery cell 20; the negative electrode tabs 40 and the positive electrode tabs 30 are respectively disposed at the other end of each battery cell 20, connecting to the negative terminal of the battery, and the negative electrode tabs 40 of each battery cell conduct current from the negative terminal of the battery; ensuring effective connection between the negative terminal and the circuit, and helping the current to flow out safely and stably from the negative terminal of the battery.

[0039] The conductive component 50 is connected to a plurality of positive electrode tabs 30 and a plurality of negative electrode tabs 40 in a preset order. The conductive component 50 connects the positive electrode tabs 30 and the negative electrode tabs 40 in a preset order, which ensures that the battery cell 20 can be flexibly connected and disconnected in different working states, and facilitates the management of the current flow of the battery pack.

[0040] The conductive component 50 enables the battery cells 20 to be in a series connection state and a capacity test state. In the series connection state, the conductive component 50 sequentially and orderly connects the positive electrode tabs 30 and negative electrode tabs 40 of the battery cells 20 to form a series circuit. In the capacity test state, the conductive component 50 connects the positive electrode tabs 30 and negative electrode tabs 40 of the battery cells 20 one by one to form a single test and troubleshooting circuit.

[0041] Specifically, when the battery pack is in series, the conductive component 50 connects all the individual battery cells sequentially from positive to negative to form a closed loop, which increases the total voltage of the battery pack; improves voltage output: through series connection, the battery pack can provide a higher voltage than a single battery, thereby meeting the high voltage requirements of external devices; simplifies battery connection: the wraparound connection of the conductive component 50 simplifies the wiring and connection of the battery pack, reducing the investment in external devices; reduces cost and complexity: the series connection makes the battery pack design simpler and can provide the required voltage without adding extra hardware.

[0042] Formation and capacity testing is a common test in battery production used to verify battery performance. In this state, the conductive component 50 connects the positive electrode tab 30 and the negative electrode tab 40 of each battery one-to-one, forming a single circuit for testing, so that each battery can be tested individually without being affected by series connections.

[0043] Individual cell testing: Formation and capacity testing can independently test the performance of each cell, ensuring that the voltage, capacity and other performance indicators of each cell meet the standards.

[0044] Improve battery quality control: Testing each individual battery cell allows for precise understanding of its performance, identification of potential defects or problems, and ensures consistent battery quality.

[0045] Avoiding series interference: By testing the batteries separately, the interference of issues such as voltage inconsistency and performance differences that may occur when connected in series can be avoided.

[0046] As can be seen from the above description, this application achieves the following technical effects:

[0047] In this embodiment, multiple connection structures are employed. The conductive component 50 enables several battery cells 20 to be in a series connection state and a formation and capacity testing state. In the series connection state, the conductive component 50 sequentially and orderly connects the positive electrode tabs 30 and negative electrode tabs 40 of several battery cells 20 to form a series loop. In the formation and capacity testing state, the conductive component 50 connects the positive electrode tabs 30 and negative electrode tabs 40 of several battery cells 20 one-to-one to form a single test and troubleshooting loop. This achieves the purpose of having multiple functions, thereby realizing the technical effects of improving production efficiency, reducing equipment investment and energy consumption. It also solves the technical problems of low efficiency, high cost and difficulty in ensuring consistency in the traditional method of forming and capacity testing of multiple battery groups, which usually uses a separate controller on the equipment.

[0048] Furthermore, a plurality of partition plates 60 are spaced apart within the housing 10 along a predetermined direction, and the partition plates 60 and the housing 10 respectively enclose multiple battery cell accommodating cavities. Placing multiple partition plates 60 inside the housing and uniformly dividing it into multiple battery cell accommodating cavities along a predetermined direction ensures that the batteries are independent of each other, avoiding faults such as short circuits. Simultaneously, the material of the partition plates 60 generally requires good electrical insulation properties and a certain degree of thermal insulation capability to prevent heat conduction between the batteries. The predetermined direction is either the length or width direction of the housing 10, which can be set according to actual usage requirements.

[0049] Furthermore, the positive electrode tab 30 and the negative electrode tab 40 are made of aluminum or nickel. It is understood that both aluminum and nickel are highly conductive materials, ensuring efficient current conduction between the positive and negative electrodes of the battery pack and the external circuitry; simultaneously, they possess excellent oxidation and corrosion resistance, effectively extending the battery pack's lifespan, especially in long-term operating environments.

[0050] Furthermore, the conductive component 50 is a nickel strip or a copper strip. It is understood that nickel and copper strips ensure efficient current conduction in the battery pack, especially under high power demands; excellent connection stability: they have good conductivity stability, effectively reducing potential contact problems or current fluctuations during battery pack use.

[0051] Furthermore, each end of the battery cell 20 is provided with an adapter plate, which is connected to the positive electrode tab 30 and the negative electrode tab 40, respectively. It is understood that the adapter plate allows the battery tabs to be more securely and firmly connected to the conductive component 50, reducing contact problems caused by vibration or temperature changes.

[0052] Easy maintenance and replacement: If a battery cell fails or needs to be replaced, the adapter plate design makes it easier to disconnect and reconnect the connection points within the battery pack, thus facilitating maintenance.

[0053] Simplified battery pack design: By setting up an adapter plate, the connection complexity between the conductive component 50 and the battery cell 20 can be effectively reduced, thereby improving production efficiency.

[0054] Furthermore, the battery cell 20 is provided with connection holes. It is understood that the connection holes help to fix the battery cells, prevent the battery cells from loosening or shifting during operation, and ensure the overall mechanical stability of the battery pack; it also facilitates production and assembly: by providing connection holes on the battery cell 20, the battery cell 20 can be easily assembled with other components (such as the separator 60, the housing 10, etc.), thereby improving production efficiency.

[0055] Furthermore, the connecting hole is connected to the separator plate 60 via fasteners. It is understood that the fasteners securely connect the battery cell 20 to the separator plate 60, making the internal structure of the battery pack more stable and preventing the batteries from loosening or shifting; enhancing safety: the separator plate 60 not only provides support but also protection, preventing short circuits between the battery cells 20 and enhancing the safety of the battery pack; and facilitating temperature control: the separator plate 60 effectively disperses heat between the batteries, helping to improve the thermal management performance of the battery pack. The fasteners include, but are not limited to, screws or bolts.

[0056] Furthermore, several terminals are respectively provided at both ends of the housing 10. It can be understood that the terminals are the interfaces for connecting the battery pack to external devices, and the power output or charging of the battery pack is realized through the terminals; the terminals can be set at both ends of the housing 10 to facilitate connection with external devices.

[0057] Furthermore, the terminals are adjustable connectors or spring connectors. It is understood that adjustable connectors provide an adjustable connection between the terminals and external devices, adapting to different wiring requirements; spring connectors can automatically adjust pressure to ensure connection stability and adapt to deformation caused by factors such as temperature or vibration; improving connection reliability: spring connectors can automatically compensate for contact loosening caused by temperature changes or other external factors, ensuring a long-term reliable connection between the battery pack and the external circuit; facilitating battery pack maintenance: adjustable connectors or spring connectors make battery pack installation and removal more convenient, especially when replacing or repairing the battery pack, reducing operational difficulty; adapting to different application scenarios: the adjustability and flexible adaptation function of the terminals allow the battery pack to be used in various application scenarios, whether at high or low temperatures, or in situations requiring frequent disassembly.

[0058] This application also relates to a battery energy storage system, including the multi-cell battery connection structure described above.

[0059] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A multi-cell battery connection structure, characterized in that, include: A shell (10); A plurality of battery cells (20) are spaced apart in the housing (10) along a predetermined direction; Several positive electrode tabs (30) are respectively disposed at one end of several battery cells (20); A plurality of negative electrode tabs (40) are respectively disposed opposite to a plurality of positive electrode tabs (30) at the other end of the battery cell (20); and The conductive component (50) is connected to a plurality of positive electrode tabs (30) and a plurality of negative electrode tabs (40) in a preset order; The conductive component (50) enables the battery cells (20) to be in a series connection state and a capacity test state. In the series connection state, the conductive component (50) sequentially and orderly connects the positive electrode tabs (30) and negative electrode tabs (40) of the battery cells (20) to form a series circuit. In the capacity test state, the conductive component (50) connects the positive electrode tabs (30) and negative electrode tabs (40) of the battery cells (20) one by one to form a single test and troubleshooting circuit.

2. The multi-cell battery connection structure according to claim 1, characterized in that, The housing (10) is provided with a plurality of partition plates (60) spaced apart along a preset direction, and the plurality of partition plates (60) and the housing (10) respectively enclose to form a plurality of battery cell (20) accommodating cavities.

3. The multi-cell battery connection structure according to claim 1, characterized in that, The positive electrode tab (30) and the negative electrode tab (40) are made of aluminum or nickel.

4. The multi-cell battery connection structure according to claim 1, characterized in that, The conductive component (50) is a nickel strip or a copper strip.

5. The multi-cell battery connection structure according to claim 4, characterized in that, The battery cell (20) has adapter plates at both ends, and the adapter plates are connected to the positive electrode tab (30) and the negative electrode tab (40) respectively.

6. The multi-cell battery connection structure according to claim 2, characterized in that, The battery cell (20) is provided with a connection hole.

7. The multi-cell battery connection structure according to claim 6, characterized in that, The connection hole is connected to the partition plate (60) by a fastener.

8. The multi-cell battery connection structure according to claim 1, characterized in that, Several terminals are provided at both ends of the housing (10).

9. The multi-cell battery connection structure according to claim 8, characterized in that, The terminal is an adjustable connector or a spring connector.

10. A battery energy storage system, characterized in that, Includes the multi-cell battery connection structure as described in any one of claims 1-9.

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