A multi-cell parallel battery

Abstract

The utility model provides a kind of multiple single cell parallel connection battery, including multiple by positive plate, negative plate and baffle and electrolyte group, the output interface of multiple group is merged and connected to one total output interface;Adjacent group is connected in parallel and constitutes primary parallel battery group between, adjacent primary parallel battery group is connected in parallel and constitutes middle-level parallel battery group between, adjacent middle-level parallel battery group is connected in parallel and constitutes senior parallel battery group between, senior parallel battery group includes all group.The utility model structure is simple and reasonable, and strong integrity, multiple single cell lead-acid battery is connected in parallel as one monomer lead-acid battery, improve the voltage stability of lead-acid battery, guarantee battery performance reliability, also can reduce battery internal resistance simultaneously, so that lead-acid battery can output higher current, improve the overall performance of lead-acid battery, simplify the connection structure of monomer battery, assembly process is simple, reduces installation error, structure is simple, install fast, easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery technology; specifically, it relates to a multi-cell parallel battery. Background Technology

[0002] Lead-acid batteries, a widely used chemical power source, use lead and its oxides as electrodes and sulfuric acid aqueous solution as the electrolyte to achieve the interconversion of chemical energy and electrical energy. The working principle of lead-acid batteries mainly relies on the chemical reaction between the positive and negative plates and the electrolyte. During charging, lead sulfate on the positive plate is converted into lead dioxide, while lead sulfate on the negative plate is converted into spongy lead. Conversely, during discharging, these chemical reactions proceed in reverse. Charging achieves energy storage; discharging efficiently converts chemical energy into electrical energy. This reversible reaction mechanism allows lead-acid batteries to continuously store and release electrical energy, thus achieving their cyclical nature.

[0003] Lead-acid batteries are simple in structure and inexpensive, and are widely used in various energy storage fields. The nominal voltage of a single lead-acid battery cell is 2.0V. A 2.0V lead-acid battery can discharge to 1.5V and charge to 2.4V. In engineering applications, multiple single lead-acid batteries are often connected in series to form lead-acid batteries with nominal voltages of 12V, 24V, 36V, and 48V.

[0004] Currently, larger capacity 2.0V lead-acid batteries (such as 2V 800Ah and above) are composed of two or four individual lead-acid cells, completely isolated from each other. This results in poor overall voltage stability due to performance differences between the individual cells. When any single cell fails, the overall battery voltage drops, potentially causing the entire battery to fail. Damage to a single cell affects the entire battery pack; increasing the number of cells required can even reduce reliability and increase the risk of battery failure.

[0005] Currently, some 2.0V lead-acid batteries are designed as single-cell structures to avoid performance differences between multiple cells. However, this structure requires mounting a large number of plates within a single cell, resulting in complex assembly processes and a high rate of installation errors. Furthermore, a single-cell battery contains multiple electrochemical units, each following electrochemical reaction principles. Therefore, even minor damage to a single cell can lead to the failure of the entire battery. Utility Model Content

[0006] Therefore, the purpose of this utility model is to design a multi-cell parallel battery, which connects multiple lead-acid cells in parallel to form a single lead-acid battery, thereby improving the voltage stability of the lead-acid battery, ensuring the reliability of battery performance, reducing the internal resistance of the battery, enabling the lead-acid battery to output higher current, improving the overall performance of the lead-acid battery, simplifying the connection structure of the single cells, simplifying the assembly process, reducing installation errors, and improving the performance of the battery product.

[0007] This utility model provides a multi-cell parallel battery, comprising: multiple electrode groups composed of positive electrode plates, negative electrode plates, separators, and electrolyte; the output interfaces of the multiple electrode groups are combined and connected to a total output interface; adjacent electrode groups are connected in parallel to form a primary parallel battery pack; adjacent primary parallel battery packs are connected in parallel to form a secondary parallel battery pack; adjacent secondary parallel battery packs are connected in parallel to form a high-level parallel battery pack; the high-level parallel battery pack includes all the electrode groups.

[0008] For example, a lead-acid battery with four cells in parallel connects the first and second electrode groups and the third and fourth electrode groups in parallel, respectively, so that the four cells are connected in parallel into two individual cells. Then, the two initially connected individual cells are further connected in parallel into one individual cell, thereby realizing the connection of the four independent cells inside the lead-acid battery into a total single cell, which increases the battery capacity.

[0009] The output interfaces of each cell group are connected together on the outside of the battery casing and then connected to the main output interface of the entire individual cell. This main output interface then connects to the power supply line of an external device, enabling power output to that device. This wiring structure allows the battery to maintain a large capacity while avoiding the messy cables associated with multiple individual cell outputs. When connecting to external devices, only a single cable is needed for quick and easy operation.

[0010] By connecting multiple individual cells of a battery in parallel to form a single cell, the performance parameters such as voltage among the individual lead-acid cells are balanced. When one cell fails, the overall voltage of the single cell remains stable, ensuring the stability and reliability of the overall battery output parameters and reducing the probability of battery failure.

[0011] At the same time, the total number of cells connected in parallel allows the current to be distributed to each cell. According to Ohm's law, the overall internal resistance of the battery is reduced, which also significantly reduces the internal resistance between each cell. This enables the lead-acid battery to achieve higher current output. This physical characteristic of the parallel structure makes the voltage fluctuation smaller and the energy conversion loss less when the total number of cells outputs the same power, further improving the battery performance parameters.

[0012] Furthermore, a busbar is welded to the positive or negative plate of the electrode group, and a parallel offset post is welded between two busbars of adjacent electrode groups. The parallel offset post forms an arc-shaped bridge structure between the busbars of two adjacent electrode groups.

[0013] Specifically, the parallel eccentric columns are made of metal materials with high conductivity, preferably lead.

[0014] For example, parallel offset columns are welded between the two busbars of the first and second pole groups, and between the two busbars of the third and fourth pole groups, to achieve parallel connection between the first and second pole groups, and between the third and fourth pole groups.

[0015] Designing the welding structure of the parallel off-center column as an arched bridge shape (bridge welding) can effectively solve the problem that conventional cover welds are prone to causing the welds to cover the opposite polarity plates of the same electrode group, resulting in the misconnection of the positive and negative plates, and avoid the safety risk of short circuits in the electrode group due to the welding process.

[0016] Furthermore, each of the electrode groups is provided with a parallel pole post, which is welded and fixed to the busbar of the electrode group, and the top of the parallel pole post is conical.

[0017] Specifically, the parallel terminals are made of lead.

[0018] The parallel pole has a tapered structure with a gradually tapering geometric transition from bottom to top. This gradually tapering geometric transition design allows for the smooth installation of external connectors for the parallel pole through the beveled contact surface. It is convenient to fit the components to be connected into the parallel pole and can achieve a clamping mechanical fixation by utilizing the beveled contact surface.

[0019] Furthermore, parallel lead bars are provided between adjacent primary parallel battery packs, and the parallel lead bars are fixedly connected to the parallel terminals of the adjacent primary parallel battery packs.

[0020] By connecting parallel terminals and lead strips, two cells that have already been initially connected in parallel can be connected in parallel again to form a single cell (intermediate parallel battery pack). Similarly, an intermediate parallel battery pack can be further connected in parallel through parallel terminals and lead strips to become an advanced parallel battery pack, thereby realizing the parallel connection of multiple independent cells within the battery into a single overall cell.

[0021] Furthermore, the parallel offset column comprises two vertically parallel columns, the tops of which are welded together, and the bottoms of which are respectively connected to a busbar in two adjacent pole groups.

[0022] Setting the two columns separately allows for better dispersion and resistance to external lateral thrust (such as bumps and impacts), making the welded parallel offset column structure more stable and improving the structural stability and safety of the parallel offset columns and the two connected busbars. Furthermore, setting the two columns separately optimizes the structural design, helps reduce costs, and the dual-column design is more economical in terms of material usage, reducing material waste.

[0023] Furthermore, a terminal post is provided near the outer edge of the electrode group, with the top of the terminal post extending outside the battery casing and the bottom of the terminal post welded to the busbar.

[0024] The terminal block serves as the output connection interface for each pole group. The output connections of each pole group converge on the outside of the battery casing and merge into the total output interface of the single cell. The total output interface is connected to the external power receiving device to provide power to the external power receiving device.

[0025] The wiring terminals are located near the outer edge of the electrode group, which facilitates wiring operations for staff and prevents the cables from being scratched by the battery casing during connection, thus protecting the cables.

[0026] Furthermore, the parallel terminals of adjacent primary parallel battery packs are arranged in a staggered manner, and the parallel lead bars are connected between the parallel terminals of adjacent primary parallel battery packs at an inclined angle in the horizontal direction.

[0027] The inclined connection of parallel lead strips between two battery packs ensures uniform current distribution, preventing undercharging or overcharging of some individual cells, thus improving overall charging efficiency. The inclined connection also helps reduce voltage differences between individual cells, ensuring even charging of each cell and reducing voltage imbalance, thereby extending battery life. Furthermore, the inclined connection enhances safety, especially during parallel charging. If a problem occurs in one cell, the inclined connection reduces the impact on other cells, preventing a chain reaction and minimizing safety hazards. Finally, the inclined connection allows the entire battery pack to provide more stable current and voltage output during discharge, improving overall discharge performance.

[0028] Furthermore, the two ends of the parallel lead strip are welded to the parallel terminals of the adjacent primary parallel battery pack.

[0029] Traditional threaded connections and other flexible connection methods require frequent maintenance checks to prevent screw loosening. The welding method used in this invention significantly reduces the frequency of daily maintenance and lowers maintenance costs compared to threaded connections. Although replacing each parallel lead bar or parallel pole requires specialized welding, the long-term stability and anti-aging capabilities of the rigid connection structure reduce sudden failures caused by poor contact, decrease the likelihood of breakage or deformation under external impact, and improve the stability and reliability of the structural connection.

[0030] Furthermore, multiple parallel poles are provided on each busbar, and the multiple parallel poles are evenly distributed at equal intervals.

[0031] Multiple parallel terminals are evenly spaced on the busbar to ensure the distance between the positive and negative electrodes remains within a safe range, thereby reducing the risk of short circuits and optimizing battery performance. During assembly and maintenance, the evenly spaced arrangement makes it easier for technicians to connect and disconnect the parallel terminals, improving inspection and maintenance efficiency. Compared with the prior art, the beneficial effects of this utility model are as follows: The multi-cell parallel battery structure provided by this utility model is simple and reasonable, with strong overall integrity. It connects multiple lead-acid cells in parallel into a single lead-acid battery, which improves the voltage stability of the lead-acid battery, ensures the reliability of battery performance, and reduces the internal resistance of the battery, enabling the lead-acid battery to output higher current, thereby improving the overall performance of the lead-acid battery. It simplifies the connection structure of the single cells, makes the assembly process simple, reduces installation errors, improves the performance of battery products, has a simple structure, is quick to install, is easy to maintain, has wide applicability, and has broad prospects for promotion and application. Attached Figure Description Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a structural diagram of a four-cell parallel battery according to an embodiment of the present invention; Figure 2 This is an installation diagram of the parallel offset post and the wiring post according to an embodiment of the present utility model.

[0032] The markings in the attached figure are as follows: 1. First pole group, 2. Second pole group, 3. Third pole group, 4. Fourth pole group, 5. Parallel offset post, 6. Parallel pole post, 7. Parallel lead strip, 8. Busbar, 9. Wiring pole post. Detailed Implementation

[0033] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] In the description of this utility model, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings: Example This utility model embodiment provides a multi-cell parallel battery (such as...) Figure 1 As shown, the battery includes four electrode groups, each consisting of a positive electrode, a negative electrode, a separator, and an electrolyte. The output interfaces of the four electrode groups are combined and connected to a single output interface. Adjacent electrode groups are connected in parallel to form a primary parallel battery pack. Adjacent primary parallel battery packs are connected in parallel to form a secondary parallel battery pack. Adjacent secondary parallel battery packs are connected in parallel to form a high-level parallel battery pack. The high-level parallel battery pack contains all four electrode groups, forming a four-cell parallel lead-acid battery. A busbar 8 is welded to either the positive or negative electrode plate of each electrode group. A parallel offset post 5 is welded between two busbars 8 of adjacent electrode groups. The parallel offset post 5 is made of lead. The parallel offset post 5 includes two vertically parallel posts. The tops of each post are welded together, and the bottoms of each post are connected to one of the busbars 8 in the two adjacent electrode groups. Figure 1As shown, the two separately installed columns can better disperse and resist external lateral thrust such as bumps and impacts, making the welded parallel offset column 5 structure more stable and improving the structural stability and safety of the parallel offset column 5 and the two connected busbars 8. Furthermore, the separate installation of the two columns also helps to reduce material costs and waste.

[0037] The parallel offset column 5 is bridged and welded between the busbars 8 of two adjacent pole groups, specifically between the two busbars 8 of the first pole group 1 and the second pole group 2, and between the two busbars 8 of the third pole group 3 and the fourth pole group 4 (e.g., Figure 2 As shown in the figure, the first pole group 1 and the second pole group 2, the third pole group 3 and the fourth pole group 4 are connected in parallel, and the four cells are connected in parallel into two cells.

[0038] Each electrode group is equipped with a parallel terminal post 6, which is welded and fixed to the busbar 8 of that electrode group. The top of the parallel terminal post 6 is conical. The parallel terminal post 6 is made of lead. The parallel terminal post 6 has a tapered geometric transition from bottom to top, and the beveled contact surface of the conical structure facilitates the smooth installation of external connectors. The components to be connected are inserted into the parallel terminal post 6, and the beveled contact surface provides a clamping mechanical fixation. Parallel lead strips 7 are installed between adjacent primary parallel battery packs, and the parallel lead strips 7 are fixedly connected to the parallel terminal posts 6 of the adjacent primary parallel battery packs.

[0039] The parallel terminals 6 of adjacent primary parallel battery packs are arranged in a staggered manner, and the parallel lead strips 7 are connected at an inclined angle in the horizontal direction between the parallel terminals 6 of adjacent primary parallel battery packs (e.g., Figure 1 (As shown). The parallel lead strip 7 is inclined between the two battery packs to ensure uniform current distribution, avoid undercharging or overcharging of some individual battery cells, and improve overall charging efficiency. The inclined connection helps reduce voltage differences between battery cells, ensuring that each battery cell can be charged evenly, thereby reducing voltage imbalance and extending battery life. The inclined connection enhances safety, especially during parallel charging. If a problem occurs in one battery cell, the inclined connection can reduce the impact on other battery cells, avoid chain reactions, and reduce safety hazards. Through the inclined connection, the total number of individual batteries can provide more stable current and voltage output during discharge, improving overall discharge performance. The two ends of the parallel lead strip 7 are welded to the parallel terminals 6 of the adjacent primary parallel battery pack. Compared with threaded connections, welding reduces the frequency of daily maintenance and lowers maintenance costs. It also reduces the phenomenon of breakage and deformation under external impact, improving the stability and reliability of the structural connection.

[0040] By connecting the two initially parallel cells to a single cell again through parallel terminals 6 and parallel lead bars 7 (intermediate parallel battery pack), the two initially parallel cells (intermediate parallel battery pack) are further connected in parallel to a single cell through parallel terminals 6 and parallel lead bars 7 (advanced parallel battery pack). After multiple independent cells inside the battery are connected in parallel to become a single cell, the battery capacity is increased.

[0041] Each electrode group has a terminal post 9 near its outer edge. The top of the terminal post 9 extends outside the battery casing, and the bottom of the terminal post 9 is welded to the busbar 8. The terminal post 9 serves as the output connection interface for each electrode group. The output connections of each electrode group converge on the outside of the battery casing and connect to the main output interface of the entire single battery. The main output interface is connected to the power supply line of the external power receiving device, enabling power supply to the external power receiving device. Only one cable is needed for quick connection and use, making operation convenient and maintenance easy. The location of the terminal post 9 near the outer edge of the electrode group facilitates wiring operations and prevents the cable from being scratched by the battery casing during connection, thus protecting the cable.

[0042] By connecting multiple individual cells of a battery in parallel to form a single unit, the performance parameters, such as voltage, of the individual lead-acid cells are balanced. Even if one cell fails, the overall voltage of the entire unit remains stable, ensuring the stability and reliability of the battery's overall output parameters and reducing the probability of battery failure. Simultaneously, the parallel connection of the entire unit distributes current to each cell, reducing the overall internal resistance of the battery. This allows the lead-acid battery to achieve higher current output, resulting in smaller voltage fluctuations and reduced energy conversion losses when the total unit outputs the same power, thus improving battery performance parameters.

[0043] The multi-cell parallel battery structure in this embodiment is simple and reasonable, with strong overall integrity. It connects multiple lead-acid cells in parallel into a single lead-acid battery, which improves the voltage stability of the lead-acid battery, ensures the reliability of battery performance, and reduces the internal resistance of the battery, enabling the lead-acid battery to output higher current, thus improving the overall performance of the lead-acid battery. It simplifies the connection structure of the individual cells, makes the assembly process simple, reduces installation errors, improves the performance of the battery product, and has a simple structure, quick installation, easy maintenance, and wide applicability. The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-cell parallel battery, characterized in that, include: Multiple electrode groups, each consisting of a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, are connected together to a single output interface. Adjacent electrode groups are connected in parallel to form a primary parallel battery pack, adjacent primary parallel battery packs are connected in parallel to form a secondary parallel battery pack, and adjacent secondary parallel battery packs are connected in parallel to form a high-level parallel battery pack, wherein the high-level parallel battery pack contains all of the electrode groups. Busbars are welded to the positive or negative plates of the electrode group, and parallel offset columns are welded between two busbars of adjacent electrode groups. The parallel offset columns form an arc-shaped bridge structure between the busbars of two adjacent electrode groups. A terminal post is provided near the outer edge of the electrode group. The top of the terminal post extends outside the battery casing, and the bottom of the terminal post is welded to the busbar.

2. The multi-cell parallel battery according to claim 1, characterized in that, Each of the electrode groups is provided with a parallel pole post, which is welded and fixed to the busbar of the electrode group. The top of the parallel pole post is conical.

3. The multi-cell parallel battery according to claim 2, characterized in that, Parallel lead bars are provided between adjacent primary parallel battery packs, and the parallel lead bars are fixedly connected to the parallel terminals of the adjacent primary parallel battery packs.

4. The multi-cell parallel battery according to claim 1, characterized in that, The parallel offset column comprises two vertically parallel columns, with the tops of each column welded together and the bottoms of each column connected to a busbar in one of the two adjacent pole groups.

5. The multi-cell parallel battery according to claim 3, characterized in that, The parallel terminals of adjacent primary parallel battery packs are arranged in a staggered manner, and the parallel lead bars are connected between the parallel terminals of adjacent primary parallel battery packs at an inclined angle in the horizontal direction.

6. The multi-cell parallel battery according to claim 3, characterized in that, The two ends of the parallel lead strip are welded to the parallel terminals of the adjacent primary parallel battery pack.

7. The multi-cell parallel battery according to claim 2, characterized in that, Multiple parallel poles are provided on each busbar, and the multiple parallel poles are evenly distributed at equal intervals.

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