Negative electrode connection structure and battery production apparatus

Abstract

The application relates to the technical field of battery production, and discloses a negative electrode connecting structure and a battery production device, wherein the negative electrode connecting structure comprises a mounting bracket, a plurality of negative electrode probe assemblies, a first bus bar, a second bus bar and a plurality of DC-DC power supply modules; the mounting bracket is provided with a first mounting portion and a second mounting portion which are arranged at intervals; the plurality of negative electrode probe assemblies are arranged in the first mounting portion; the first bus bar is arranged in the first mounting portion; the second bus bar is arranged in the second mounting portion, and a connecting end of the second bus bar is electrically connected with a connecting end of the first bus bar; and the output negative electrode ports of the DC-DC power supply modules are electrically connected with the second bus bar. In the application, the negative electrode probe assemblies and the output negative electrode ports of the DC-DC power supply modules are electrically connected through the first bus bar and the second bus bar, the connecting wire harness extending from the first mounting portion to the second mounting portion can be reduced, the complexity of the wire harness is reduced, the wire harness is convenient to set and install, and maintenance is convenient.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a negative electrode connection structure and battery manufacturing equipment. Background Technology

[0002] Battery production equipment is a device that performs formation and capacity testing on batteries, and it plays a crucial role in the battery production process.

[0003] Battery production equipment may include a DC-DC power supply module, a positive electrode probe assembly, and a negative electrode probe assembly arranged sequentially from top to bottom. The DC-DC power supply module can convert DC power into voltage and current suitable for battery formation and capacity testing processes. The battery production equipment can supply power to the battery and test the battery through the positive electrode probe assembly and the negative electrode probe assembly.

[0004] To meet the demands of large-scale battery production, battery production equipment has multiple positive electrode probe assemblies and multiple negative electrode probe assemblies. Each positive electrode probe assembly and each negative electrode probe assembly has multiple probes. However, each negative electrode probe needs to be electrically connected to the negative output of the DC-DC power supply module, resulting in numerous and complex wiring harnesses. This not only increases the cost of the wiring harnesses but also makes routing difficult and inconvenient for installation and maintenance. Utility Model Content

[0005] This application discloses a negative connection structure that can reduce the number of connecting wires extending from the first mounting part to the second mounting part, thereby reducing wire harness costs, lowering wire harness complexity, facilitating wire harness setup and installation, and simplifying maintenance.

[0006] To achieve the above objectives, according to a first aspect of this application, a negative electrode connection structure is provided, comprising: a mounting bracket having a first mounting portion and a second mounting portion spaced apart;

[0007] Multiple negative electrode probe assemblies are all disposed in the first mounting part;

[0008] A first busbar is disposed at the first mounting part, and each of the negative electrode probe assemblies is electrically connected to the first busbar;

[0009] A second busbar is disposed on the second mounting part, and the connection end of the second busbar is electrically connected to the connection end of the first busbar;

[0010] Multiple DC-DC power modules are disposed in the second mounting part. Each DC-DC power module has an output negative port, and the output negative port of each DC-DC power module is electrically connected to the second busbar.

[0011] As an optional implementation, each of the DC-DC power modules has an input negative port, and the input negative port of each of the DC-DC power modules is electrically connected to the second busbar.

[0012] The mounting bracket also has a third mounting portion, which is spaced apart from the first mounting portion and the second mounting portion, respectively.

[0013] The negative electrode connection structure also includes:

[0014] A third busbar is disposed in the third mounting part, and the connection end of the third busbar is electrically connected to the connection end of the second busbar;

[0015] Multiple AC-DC power modules are disposed in the third mounting part. Each AC-DC power module has an output negative port, and the output negative port of each AC-DC power module is electrically connected to the third busbar.

[0016] As an optional implementation, the first mounting part, the second mounting part, and the third mounting part are arranged at intervals from bottom to top.

[0017] As an optional implementation, the first bus includes:

[0018] Two sub-busbars are both disposed on the first mounting part. The connection end of the sub-busbars is electrically connected to the connection end of the second busbar. The two sub-busbars extend in the same direction and are spaced apart.

[0019] A portion of the negative electrode probe assemblies are electrically connected to one of the sub-buses, while the remaining portion are electrically connected to another sub-bus.

[0020] As an optional implementation, the negative electrode connection structure further includes:

[0021] The first electrical connector includes two sub-connectors, which are arranged opposite to each other along the first direction. One end of each sub-connector is connected to the connection end of the first busbar, and one sub-connector is connected to one sub-busbar. The connection positions are arranged opposite to each other along the first direction. The other end of each sub-connector is connected to the connection end of the second busbar, and the connection positions of the two sub-connectors to the second busbar are respectively located at both ends of the second busbar along the first direction.

[0022] The second electrical connector has two ends connected to the connection end of the second busbar and the connection end of the third busbar, respectively. The connection position of the second electrical connector to the second busbar is located at one end of the second busbar along the first direction, and the connection position of the second electrical connector to the third busbar is located at one end of the third busbar along the first direction.

[0023] As an optional implementation, the sub-connector includes:

[0024] The first metal strip has two ends connected to the connection ends of the first busbar and the second busbar, respectively, and the first metal strip is bent.

[0025] The second metal strip has its two ends connected to the connection ends of the first busbar and the second busbar, respectively. The second metal strip is bent, and the curvature of the second metal strip is different from that of the first metal strip.

[0026] As an optional implementation, the plurality of negative electrode probe assemblies electrically connected to the same sub-bus include:

[0027] A first negative electrode probe assembly, the first negative electrode probe assembly having a first electrical connection plate, the first electrical connection plate extending along a second direction, the second direction being perpendicular to the first direction;

[0028] The second negative electrode probe assembly has a second electrical connection plate extending along a second direction.

[0029] The third negative electrode probe assembly has a third electrical connection plate, which extends along the second direction, and the third electrical connection plate, the second electrical connection plate and the first electrical connection plate are arranged at intervals along the first direction.

[0030] The sub-bus has:

[0031] The first sub-bus section extends along the first direction and extends from the first electrical connection plate to the second electrical connection plate. One end of the first sub-bus section is electrically connected to the first electrical connection plate, and the other end is electrically connected to the second electrical connection plate.

[0032] The second sub-bus section extends along the first direction and extends from the second electrical connection plate to the third electrical connection plate. One end of the second sub-bus section is electrically connected to the second electrical connection plate, and the other end is electrically connected to the third electrical connection plate.

[0033] The third sub-bus section extends along the first direction and extends from the third electrical connection plate to the sub-connector. One end of the third sub-bus section is electrically connected to the third electrical connection plate, and the other end is electrically connected to the sub-connector.

[0034] The cross-sectional areas of the third sub-conduit segment, the second sub-conduit segment, and the first sub-conduit segment decrease sequentially.

[0035] As an optional implementation, the plurality of said AC-DC power supply modules include:

[0036] A first AC-DC power supply module, wherein the output negative terminal of the first AC-DC power supply module has a first negative terminal connection plate;

[0037] The second AC-DC power supply module has a second negative terminal connection plate at its output negative terminal port.

[0038] The third AC-DC power supply module has a third negative terminal connection plate at its output negative terminal port. The first negative terminal connection plate, the second negative terminal connection plate, and the third negative terminal connection plate are arranged at intervals along the first direction.

[0039] The third bus includes:

[0040] The first busbar extends along the first direction and extends from the first negative electrode connection plate to the second negative electrode connection plate. One end of the first busbar is electrically connected to the first negative electrode connection plate, and the other end is electrically connected to the second negative electrode connection plate.

[0041] The second busbar extends along the first direction and extends from the second negative electrode connection plate to the third negative electrode connection plate. One end of the second busbar is electrically connected to the second negative electrode connection plate, and the other end is electrically connected to the third negative electrode connection plate.

[0042] The third busbar extends along the first direction and extends from the third negative electrode connection plate to the second electrical connector. One end of the third busbar is electrically connected to the third negative electrode connection plate, and the other end is electrically connected to the second electrical connector.

[0043] The cross-sectional areas of the third busbar, the second busbar, and the first busbar decrease sequentially.

[0044] According to an embodiment of the second aspect of this application, a battery manufacturing apparatus is provided, including the aforementioned negative electrode connection structure.

[0045] As an optional implementation, the negative connection structure includes: multiple AC-DC power supply modules;

[0046] Each of the AC-DC power supply modules has a positive output port;

[0047] Each of the DC-DC power supply modules has an output positive port and an input positive port;

[0048] The battery production equipment also includes:

[0049] Multiple positive electrode probe assemblies are all mounted on the mounting bracket;

[0050] The fourth bus is disposed on the mounting bracket. The positive output port of each AC-DC power module is electrically connected to the connection terminal of the fourth bus, and the positive input port of each DC-DC power module is electrically connected to the connection terminal of the fourth bus.

[0051] Compared with the prior art, the beneficial effects of this application are:

[0052] The negative connection structure provided in this application embodiment can integrate the electrical connections of multiple negative probe assemblies and multiple DC-DC power modules through the setting of the first bus and the second bus. Only the first bus and the second bus need to be electrically connected, eliminating the need for many wire harnesses to extend from the first mounting part to the second mounting part. This can significantly reduce the number of wire harnesses extending from the first mounting part to the second mounting part, reduce wire harness costs, and make the wiring of the device simpler, reducing the complexity of the wire harness and avoiding the problems of difficult wiring and inconvenient maintenance caused by too many wire harnesses. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the battery production equipment disclosed in the embodiments of this application;

[0055] Figure 2 This is a schematic diagram of the battery production equipment from another perspective of the embodiments disclosed in this application;

[0056] Figure 3 This is a schematic diagram of a partial circuit connection of a battery production equipment having an AC-DC power supply module, as disclosed in an embodiment of this application.

[0057] Figure 4 This is a partial circuit connection diagram of a battery production equipment with three AC-DC power supply modules disclosed in an embodiment of this application.

[0058] Explanation of reference numerals in the attached figures:

[0059] 10-Negative electrode probe assembly; 11-First negative electrode probe assembly; 111-First electrical connection board; 12-Second negative electrode probe assembly; 121-Second electrical connection board; 13-Third negative electrode probe assembly; 131-Third electrical connection board; 20-First busbar; 21-Sub-busbar; 211-First sub-busbar segment; 212-Second sub-busbar segment; 213-Third sub-busbar segment; 30-Second busbar; 40-DC-DC power supply module; 50-Third busbar; 51-First busbar Section; 52-Second busbar; 53-Third busbar; 60-AC-DC power supply module; 61-First AC-DC power supply module; 62-Second AC-DC power supply module; 63-Third AC-DC power supply module; 70-First electrical connector; 71-Sub-connector; 711-First metal strip; 712-Second metal strip; 80-Second electrical connector; 90-Positive probe assembly; 100-Fourth busbar; 110-Battery; a-First direction; b-Second direction. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0061] In this application, the terms "upper," "lower," "top," "bottom," "inner," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0062] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0063] Furthermore, the terms "set up," "equipped with," and "connected" 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 application based on the specific circumstances.

[0064] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0065] Battery production equipment is a device that performs formation and capacity testing on batteries, and it plays a crucial role in the battery production process.

[0066] Battery production equipment may include a DC-DC power supply module, a positive electrode probe assembly, and a negative electrode probe assembly arranged sequentially from top to bottom. The DC-DC power supply module can convert DC power into voltage and current suitable for battery formation and capacity testing processes. The battery production equipment can supply power to the battery and test the battery through the positive electrode probe assembly and the negative electrode probe assembly.

[0067] To meet the demands of large-scale battery production, battery production equipment has multiple positive electrode probe assemblies and multiple negative electrode probe assemblies. Each positive electrode probe assembly and each negative electrode probe assembly has multiple probes. However, each negative electrode probe needs to be electrically connected to the negative output of the DC-DC power supply module, resulting in numerous and complex wiring harnesses. This not only increases the cost of the wiring harnesses but also makes routing difficult and inconvenient for installation and maintenance.

[0068] Based on this, the present application provides a negative connection structure that can reduce the number of connecting wires extending from the first mounting part to the second mounting part, reduce wire harness costs, reduce wire harness complexity, facilitate wire harness setup and installation, and facilitate maintenance.

[0069] The following will combine the embodiments and Figures 1-4 The technical solution of this application will be further explained.

[0070] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the battery production equipment disclosed in the embodiments of this application. Figure 2This is a schematic diagram of the battery production equipment from another perspective disclosed in an embodiment of this application. This application discloses a negative electrode connection structure, including: a mounting bracket (not shown in the figure), multiple negative electrode probe assemblies 10, a first busbar 20, a second busbar 30, and multiple DC-DC power modules 40. The mounting bracket has a first mounting portion (not shown in the figure) and a second mounting portion (not shown in the figure) spaced apart. Multiple negative electrode probe assemblies 10 are all disposed in the first mounting portion. The first busbar 20 is disposed in the first mounting portion, and each negative electrode probe assembly 10 is electrically connected to the first busbar 20. The second busbar 30 is disposed in the second mounting portion, and the connection end of the second busbar 30 is electrically connected to the connection end of the first busbar 20. Multiple DC-DC power modules 40 are all disposed in the second mounting portion, each DC-DC power module 40 has an output negative electrode port, and the output negative electrode port of each DC-DC power module 40 is electrically connected to the second busbar 30.

[0071] Specifically, the DC-DC power supply module 40 can convert one DC voltage to another DC voltage, and can also be called a DC / DC (Direct Current / Direct Current) converter or DC / DC module. The DC-DC power supply module 40 has an input positive port and an input negative port that are electrically connected to the AC-DC power supply module 60, as well as an output positive port that is electrically connected to the positive probe and an output negative port that is electrically connected to the negative probe.

[0072] The first mounting portion of the mounting bracket provides a mounting point for the negative electrode probe assembly 10 and the first busbar 20, while the second mounting portion provides a mounting point for the second busbar 30 and the DC-DC power module 40. The first and second mounting portions can be spaced apart vertically, with the first mounting portion located below the second mounting portion. The first busbar 20 can be either copper or aluminum; no specific limitation is made here. Each negative electrode probe assembly 10 can have multiple negative electrode probes. When testing the battery 110, each negative electrode probe can be electrically connected to the negative electrode of one battery 110, increasing the number of batteries 110 that can be tested at a time and meeting the needs of large-scale production. The negative electrode probes in the same negative electrode probe assembly 10 can be electrically connected to a single electrical connection board, meaning they share the same negative electrode within the negative electrode probe assembly 10. Each negative electrode probe assembly 10 is then electrically connected to the first busbar 20 via an electrical connection board, further reducing the number of wiring harnesses and lowering wiring harness complexity.

[0073] By integrating the first busbar 20 and the second busbar 30, the electrical connections of multiple negative probe assemblies 10 and multiple DC-DC power modules 40 are achieved. This eliminates the need for a separate wiring harness connecting each output negative port of the DC-DC power module 40 to each negative probe of the negative probe assembly 10. It also eliminates the need for numerous wiring harnesses extending from the first mounting section to the second mounting section. Simply connecting the first busbar 20 and the second busbar 30 significantly reduces the number of wiring harnesses extending from the first mounting section to the second mounting section, lowering wiring costs and simplifying the wiring process. This avoids the difficulties in routing and maintenance caused by excessive wiring harnesses. Furthermore, the structure of the first busbar 20 and the second busbar 30 is more conducive to heat dissipation, reducing the equipment temperature and improving its reliability and lifespan.

[0074] The first busbar 20 and the second busbar 30 can also effectively collect and conduct current, reduce resistance and loss during current transmission, and improve the efficiency and stability of current transmission, thereby ensuring the normal operation and testing accuracy of battery production equipment.

[0075] According to the negative connection structure of this utility model embodiment, the electrical connections of multiple negative probe assemblies 10 and multiple DC-DC power modules 40 can be integrated by setting the first busbar 20 and the second busbar 30. Only the first busbar 20 and the second busbar 30 need to be electrically connected, eliminating the need for many wire harnesses to extend from the first mounting part to the second mounting part. This can significantly reduce the number of wire harnesses extending from the first mounting part to the second mounting part, reduce wire harness costs, and make the wiring of the device simpler, reducing the complexity of the wire harness and avoiding the problems of difficult wiring and inconvenient maintenance caused by too many wire harnesses.

[0076] Combination Figure 1 and Figure 2 In some embodiments, each DC-DC power module 40 has an input negative port, and the input negative port of each DC-DC power module 40 is electrically connected to the second bus 30; the mounting bracket also has a third mounting portion (not shown in the figure), which is spaced apart from the first mounting portion and the second mounting portion; the negative connection structure also includes a third bus 50 and a plurality of AC-DC power modules 60. The third bus 50 is disposed in the third mounting portion, and the connection end of the third bus 50 is electrically connected to the connection end of the second bus 30; the plurality of AC-DC power modules 60 are all disposed in the third mounting portion, each AC-DC power module 60 has an output negative port, and the output negative port of each AC-DC power module 60 is electrically connected to the third bus 50.

[0077] Specifically, the AC-DC power module 60 can convert an AC voltage into a DC voltage, and can also be called an AC / DC (Alternating Current / Direct Current) converter or AC / DC module. The third bus 50 can be a copper bus or an aluminum bus. The AC-DC power module 60 has an input positive port and an input negative port electrically connected to an external power source, and an output positive port electrically connected to the input positive port of the DC-DC power module 40, and an output negative port electrically connected to the input negative port of the DC-DC power module 40. The external power source is usually AC, which is converted to DC by the AC-DC power module 60. After processing by the DC-DC power module 40, the current and voltage of the DC power are adapted to the battery 110 under test. The third mounting part is spaced apart from the first and second mounting parts, and the third mounting part can be located above the second mounting part. The AC-DC power modules are installed using the third mounting section of the mounting bracket, making the internal layout of the AC-DC power modules 60 and DC-DC power modules 40 more reasonable and compact. This avoids mutual interference between the AC-DC power modules 60 and 40 and the battery 110 or other components, improving the space utilization and ease of assembly. Furthermore, the third bus 50 integrates the electrical connections of multiple AC-DC power modules 60. When connecting the AC-DC power modules 60, it is no longer necessary to have a separate wire harness connected to the negative input port of each AC-DC power module 40. This also eliminates the need for numerous wire harnesses extending from the second mounting section to the third mounting section. Simply connecting the second bus 30 and the third bus 50 significantly reduces the number of wire harnesses extending from the second to the third mounting section, lowering wiring costs and simplifying the wiring process. This reduces wiring complexity and avoids the difficulties in routing and maintenance caused by excessive wiring. Furthermore, the third bus 50 reduces losses during current transmission, improves the efficiency and stability of current transmission, and helps to enhance the reliability and performance of equipment operation.

[0078] Combination Figure 1 and Figure 2In some embodiments, the first, second, and third mounting portions are arranged alternately from bottom to top. By arranging the first, second, and third mounting portions alternately from bottom to top, the entire negative electrode connection structure presents a regular hierarchical distribution in space. This layout helps to make rational use of the vertical space of the equipment, avoid mutual interference between components, improve the compactness and integration of the equipment, and also facilitate the installation, disassembly, and maintenance of each component. Furthermore, the orderly spacing facilitates air circulation, which can improve the heat dissipation conditions inside the equipment to a certain extent. This avoids heat accumulation due to overly dense components, thereby reducing the overall temperature of the equipment and improving its reliability and service life. Adjustment mechanisms such as slide rails and adjusting bolts can also be provided between the first and second mounting portions, and between the second and third mounting portions, allowing the spacing or angle between each pair of the first, second, and third mounting portions to be adjusted according to actual needs. This allows for better adaptation to different sizes and models of DC-DC power modules 40, AC-DC power modules 60, or negative probe assemblies 10, improving the equipment's versatility and flexibility. It also facilitates the optimization and adjustment of the equipment layout to meet the needs of process improvements or equipment upgrades.

[0079] Combination Figure 1 In some embodiments, the first busbar 20 includes two sub-busbars 21, both of which are disposed in the first mounting portion. The connection end of the sub-busbar 21 is electrically connected to the connection end of the second busbar 30. The two sub-busbars 21 extend in the same direction and are spaced apart. A portion of the negative electrode probe assemblies 10 are electrically connected to one sub-busbar 21, and the remaining portion of the negative electrode probe assemblies 10 are electrically connected to the other sub-busbar 21.

[0080] Specifically, the first bus 20 can be two buses, each consisting of two sub-buses 21, both located in the first mounting section. The two sub-buses 21 extend in the same direction and are spaced apart. This structural design increases the layout flexibility and functionality of the bus, reduces the weight and length of each sub-bus 21 in each first bus 20, and facilitates installation and connection. The number of negative probe assemblies 10 electrically connected to the two sub-buses 21 can be the same, allowing for more rational current distribution and preventing current overload or uneven distribution problems caused by connecting too many negative probe assemblies 10 to a single bus, thus improving the stability and efficiency of current transmission. Furthermore, the parallel extension and spaced arrangement of the two sub-buses 21 optimizes the layout of the first bus 20 within a limited space, allowing for a more compact arrangement of the negative probe assemblies 10, improving the space utilization of the device, and facilitating miniaturization and integration. The first bus 20 can also include three or four sub-buses 21, etc., without limitation.

[0081] Combination Figure 1 and Figure 2 In some embodiments, the negative electrode connection structure further includes a first electrical connector 70 and a second electrical connector 80. The first electrical connector 70 includes two sub-connectors 71, which are arranged opposite each other along a first direction a. One end of the sub-connector 71 is connected to the connection end of the first busbar 20, and one sub-connector 71 is connected to one sub-busbar 21. The connection positions are arranged opposite to each other along the first direction a. The other end of the sub-connector 71 is connected to the connection end of the second busbar 30, and the connection positions of the two sub-connectors 71 and the second busbar 30 are respectively located at both ends of the second busbar 30 along the first direction a. The two ends of the second electrical connector 80 are respectively connected to the connection end of the second busbar 30 and the connection end of the third busbar 50, and the connection position of the second electrical connector 80 and the second busbar 30 is located at one end of the second busbar 30 along the first direction a. The connection position of the second electrical connector 80 and the third busbar 50 is located at one end of the third busbar 50 along the first direction a.

[0082] Specifically, the first busbar 20 and the second busbar 30 are electrically connected via the first electrical connector 70, and the second busbar 30 and the third busbar 50 are electrically connected via the second electrical connector 80. The first electrical connector 70 and the second electrical connector 80 can be metal strips, specifically copper strips. The first electrical connector 70 has two sub-connectors 71, each corresponding to one of the two sub-busbars 21. The two sub-connectors 71 ensure a more uniform distribution of tension at both ends of the second busbar 30, reducing the possibility of deformation due to uneven stress and ensuring the shape and positional stability of the second busbar 30 during long-term use, thereby guaranteeing the reliability of the electrical connection. Furthermore, it guides the current to be more evenly distributed across the entire second busbar 30, avoiding problems such as overheating and material aging caused by excessive local current density, extending the service life of the equipment, and improving the quality and stability of current transmission.

[0083] Combination Figure 3 , Figure 3 This is a schematic diagram of a partial circuit connection of a battery production equipment having an AC-DC power supply module 60, as disclosed in an embodiment of this application. The negative current of the equipment is integrated through a first bus 20, a second bus 30, and a third bus 50. The first bus 20 and the second bus 30 are connected by a first connector, and the second bus 30 and the third bus 50 are connected by a second connector. This reduces the number of wiring harnesses between the first and second mounting parts, as well as between the second and third mounting parts, significantly reducing the number of external wiring harnesses, lowering wiring harness connection costs, and reducing wiring harness complexity, making installation and maintenance easier.

[0084] Combination Figure 1 and Figure 2 In some embodiments, the sub-connector 71 includes a first metal strip 711 and a second metal strip 712. The two ends of the first metal strip 711 are respectively connected to the connection end of the first busbar 20 and the connection end of the second busbar 30, and the first metal strip 711 is bent. The two ends of the second metal strip 712 are respectively connected to the connection end of the first busbar 20 and the connection end of the second busbar 30, and the second metal strip 712 is bent, and the curvature of the second metal strip 712 is different from that of the first metal strip 711.

[0085] Specifically, both the first metal strip 711 and the second metal strip 712 can be copper strips. Since both strips are curved with different curvatures, this structure increases the spatial flexibility of the connector, allowing the sub-connector 71 to better adapt to any minor displacements or deformations that may exist between the first busbar 20 and the second busbar 30. This reduces the risk of poor contact or breakage due to rigid connections, thereby improving the reliability and stability of the connection. Furthermore, the parallel connection of the two curved metal strips between the first busbar 20 and the second busbar 30 increases the cross-sectional area of ​​the connection, helping to further reduce the resistance at the connection point, optimize current distribution, reduce energy loss, and improve current transmission efficiency. Additionally, the curvature change of the curved metal strips can act as a buffer when subjected to external forces or thermal expansion and contraction, reducing tension or stress concentration on the first busbar 20 and the second busbar 30, thereby enhancing the stability of the entire structure and extending the service life of the equipment.

[0086] Combination Figure 1In some embodiments, a plurality of negative electrode probe assemblies 10 electrically connected to the same sub-busbar 21 include a first negative electrode probe assembly 11, a second negative electrode probe assembly 12, and a third negative electrode probe assembly 13. The first negative electrode probe assembly 11 has a first electrical connection plate 111 extending along a second direction b, which is perpendicular to a first direction a. The second negative electrode probe assembly 12 has a second electrical connection plate 121 extending along the second direction b. The third negative electrode probe assembly 13 has a third electrical connection plate 131 extending along the second direction b. The third electrical connection plate 131, the second electrical connection plate 121, and the first electrical connection plate 111 are arranged at intervals along the first direction a. The sub-busbar 21 has a first sub-bus segment 211, a second sub-bus segment 212, and a third sub-bus segment 213. The first sub-bus segment 211 extends along the first direction a. The first sub-bus section 211 extends along the first direction a and from the first electrical connection plate 111 to the second electrical connection plate 121. One end of the first sub-bus section 211 is electrically connected to the first electrical connection plate 111, and the other end is electrically connected to the second electrical connection plate 121. The second sub-bus section 212 extends along the first direction a and from the second electrical connection plate 121 to the third electrical connection plate 131. One end of the second sub-bus section 212 is electrically connected to the second electrical connection plate 121, and the other end is electrically connected to the third electrical connection plate 131. The third sub-bus section 213 extends along the first direction a and from the third electrical connection plate 131 to the sub-connector 71. One end of the third sub-bus section 213 is electrically connected to the third electrical connection plate 131, and the other end is electrically connected to the sub-connector 71. The cross-sectional area of ​​the third sub-bus section 213, the cross-sectional area of ​​the second sub-bus section 212, and the cross-sectional area of ​​the first sub-bus section 211 decrease sequentially.

[0087] Specifically, the first sub-bus section 211, the second sub-bus section 212, and the third sub-bus section 213 of the sub-bus 21 can be separate units or a single unit, presenting a trapezoidal structure. The cross-sectional areas of the first sub-bus section 211, the second sub-bus section 212, and the third sub-bus section 213 decrease sequentially. That is, along the direction of negative current flow, the cross-sectional area of ​​the sub-bus 21 increases by a certain amount for each negative probe assembly 10 connected, avoiding a significant increase in resistance and ensuring that the resistance is as uniform as possible throughout the sub-bus 21. Based on the attenuation law of current during transmission, the cross-sectional area of ​​each segment is rationally distributed to avoid localized overheating. It is worth noting that the negative probe assembly 10 is not limited to only the first negative probe assembly 11, the second negative probe assembly 12, and the third negative probe assembly 13; the number of negative probe assemblies 10 can be more or less, and the corresponding first sub-bus section 211, the second sub-bus section 212, and the third sub-bus section 213 are adjusted according to the number of negative probe assemblies 10. In regions with high current density, using a larger cross-sectional area can reduce resistance and heat generation; in regions with low current density, the cross-sectional area of ​​the sub-bus 21 is reduced accordingly, which ensures the reliability of current transmission, saves materials, and reduces costs.

[0088] The first direction a is the extension direction of the sub-bus, and the second direction b is perpendicular to the first direction a and is also the extension direction of the first electrical connection plate 111.

[0089] Combination Figure 1In some embodiments, the plurality of AC-DC power modules 60 include: a first AC-DC power module 61, a second AC-DC power module 62, and a third AC-DC power module 63. The output negative port of the first AC-DC power module 61 has a first negative connection plate; the output negative port of the second AC-DC power module 62 has a second negative connection plate; and the output negative port of the third AC-DC power module 63 has a third negative connection plate. The first negative connection plate, the second negative connection plate, and the third negative connection plate are arranged at intervals along a first direction a. The third busbar 50 includes a first bus section 51, a second bus section 52, and a third bus section 53. The first bus section 51 extends along the first direction a and is connected by a first negative connection plate. The first negative electrode connecting plate extends to the second negative electrode connecting plate. One end of the first busbar 51 is electrically connected to the first negative electrode connecting plate, and the other end is electrically connected to the second negative electrode connecting plate. The second busbar 52 extends along the first direction a and from the second negative electrode connecting plate to the third negative electrode connecting plate. One end of the second busbar 52 is electrically connected to the second negative electrode connecting plate, and the other end is electrically connected to the third negative electrode connecting plate. The third busbar 53 extends along the first direction a and from the third negative electrode connecting plate to the second electrical connector 80. One end of the third busbar 53 is electrically connected to the third negative electrode connecting plate, and the other end is electrically connected to the second electrical connector 80. The cross-sectional area of ​​the third busbar 53, the cross-sectional area of ​​the second busbar 52, and the cross-sectional area of ​​the first busbar 51 decrease sequentially.

[0090] Specifically, the first bus section 51, the second bus section 52, and the third bus section 53 of the third bus 50 can be separate units or a single unit, presenting a trapezoidal structure. The cross-sectional areas of the first bus section 51, the second bus section 52, and the third bus section 53 decrease sequentially. That is, along the direction of negative current flow, the cross-sectional area of ​​the third bus 50 decreases by a certain amount for each AC-DC power module 60 connected. By appropriately reducing the cross-sectional area while ensuring normal current transmission, materials are saved, costs are reduced, and the weight of the third bus 50 is lowered, facilitating installation. Based on the attenuation law of current during transmission, the cross-sectional area of ​​each section is rationally allocated to avoid localized overheating and to save materials as much as possible. It is worth noting that the AC-DC power module 60 here is not limited to only the first AC-DC power module 61, the second AC-DC power module 62, and the third AC-DC power module 63. The number of AC-DC power modules 60 can be more or less, and the corresponding first bus section 51, second bus section 52, and third bus section 53 are also adjusted according to the number of AC-DC power modules 60. That is, in areas with high current density, using a larger cross-sectional area can reduce resistance and heat generation; in areas with low current density, the cross-sectional area of ​​the sub-bus 21 is correspondingly reduced, which ensures the reliability of current transmission, saves materials, and reduces costs.

[0091] Please see Figure 1 and Figure 2 This application discloses a battery production equipment, including the aforementioned negative electrode connection structure.

[0092] Specifically, in this embodiment of the battery production equipment, the negative electrode probe assembly 10, the input negative electrode ports and output negative electrode ports of each DC-DC power supply module 40, and the output negative electrode ports of each AC-DC power supply are electrically connected through a negative electrode connection structure. The negative electrode electrical connections of multiple negative electrode probe assemblies 10, multiple DC-DC power supply modules 40, and multiple AC-DC power supply modules 60 are integrated through the arrangement of the first busbar 20, the second busbar 30, and the third busbar 50. Only the first busbar 20 and the second busbar 50 need to be connected. Busbar 30 is electrically connected via the first electrical connector 70, and the second busbar 30 and the third busbar 50 are electrically connected via the second electrical connector 80. This eliminates the need for numerous wire harnesses extending from the first mounting section to the second mounting section and from the second mounting section to the third mounting section, significantly reducing the number of wire harnesses extending from the first mounting section to the second mounting section and from the second mounting section to the third mounting section, lowering wire harness costs, and making the equipment wiring simpler, reducing wire harness complexity, and avoiding the problems of difficult wiring and inconvenient maintenance caused by excessive wire harnesses.

[0093] Combination Figure 1 , Figure 2 and Figure 4 , Figure 4 This is a partial circuit connection diagram of a battery production equipment with three AC-DC power modules 60 disclosed in an embodiment of this application. In some embodiments, the negative terminal connection structure includes multiple AC-DC power modules 60; each AC-DC power module 60 has an output positive terminal port; each DC-DC power module 40 has an output positive terminal port and an input positive terminal port; the battery production equipment also includes multiple positive terminal probe assemblies 90 and a fourth bus 100, the multiple positive terminal probe assemblies 90 are all disposed on a mounting bracket; the fourth bus 100 is disposed on the mounting bracket, the output positive terminal of each AC-DC power module 60 is electrically connected to the connection terminal of the fourth bus 100, and the input positive terminal of each DC-DC power module 40 is electrically connected to the connection terminal of the fourth bus 100.

[0094] Specifically, the fourth busbar 100 can be set on the third mounting part, and the mounting bracket can also be set with a fourth mounting part. The fourth mounting part is located between the second mounting part and the third mounting part, and the fourth mounting part is set at intervals from the second mounting part and the third mounting part, respectively. Each positive electrode probe assembly 90 can be set on the fourth mounting part, located above the negative electrode probe assembly 10 and below the DC-DC power supply module 40. The battery 110 to be tested can be set on the negative electrode probe assembly 10 and the positive electrode probe assembly 90 for testing the battery 110. Each AC-DC power module 60's output positive port is electrically connected to the fourth bus 100, achieving common positive. Each DC-DC power module 40's input positive port can obtain current input simply by being electrically connected to the fourth bus 100. This simplifies circuit setup, reduces wiring complexity, and, as a common transmission channel for positive current, effectively collects and distributes current, reducing resistance and loss during current transmission, improving current transmission efficiency and stability, and ensuring normal operation and testing accuracy of the equipment.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A negative electrode connection structure, applied in battery production equipment, characterized in that, include: The mounting bracket has a first mounting portion and a second mounting portion that are spaced apart. Multiple negative electrode probe assemblies (10) are all disposed in the first mounting part; A first busbar (20) is disposed on the first mounting part, and each of the negative electrode probe assemblies (10) is electrically connected to the first busbar (20); The second busbar (30) is disposed in the second mounting part, and the connection end of the second busbar (30) is electrically connected to the connection end of the first busbar (20); Multiple DC-DC power modules (40) are disposed in the second mounting part. Each DC-DC power module (40) has an output negative port. The output negative port of each DC-DC power module (40) is electrically connected to the second busbar (30).

2. The negative electrode connection structure according to claim 1, characterized in that, Each of the DC-DC power modules (40) has an input negative port, and the input negative port of each of the DC-DC power modules (40) is electrically connected to the second bus (30); The mounting bracket also has a third mounting portion, which is spaced apart from the first mounting portion and the second mounting portion, respectively. The negative electrode connection structure also includes: A third busbar (50) is disposed in the third mounting part, and the connection end of the third busbar (50) is electrically connected to the connection end of the second busbar (30); Multiple AC-DC power modules (60) are disposed in the third mounting part. Each AC-DC power module (60) has an output negative port. The output negative port of each AC-DC power module (60) is electrically connected to the third bus (50).

3. The negative electrode connection structure according to claim 2, characterized in that, The first mounting part, the second mounting part, and the third mounting part are arranged alternately from bottom to top.

4. The negative electrode connection structure according to claim 3, characterized in that, The first bus (20) includes: Two sub-busbars (21) are both disposed on the first mounting part. The connection end of the sub-busbar (21) is electrically connected to the connection end of the second busbar (30). The two sub-busbars (21) extend in the same direction and are spaced apart. A portion of the negative electrode probe assemblies (10) are electrically connected to one of the sub-buses (21), while the remaining portion of the negative electrode probe assemblies (10) are electrically connected to another of the sub-buses (21).

5. The negative electrode connection structure according to claim 4, characterized in that, The negative electrode connection structure also includes: A first electrical connector (70) includes two sub-connectors (71). The two sub-connectors (71) are arranged opposite each other along a first direction (a). One end of each sub-connector (71) is connected to the connection end of the first busbar (20), and one sub-connector (71) is connected to one sub-busbar (21). The connection positions are arranged opposite to each other along the first direction (a). The other end of each sub-connector (71) is connected to the connection end of the second busbar (30), and the connection positions of the two sub-connectors (71) and the second busbar (30) are respectively located at both ends of the second busbar (30) along the first direction (a). The second electrical connector (80) has two ends connected to the connection ends of the second busbar (30) and the third busbar (50), respectively. The connection position of the second electrical connector (80) to the second busbar (30) is located at one end of the second busbar (30) along the first direction (a), and the connection position of the second electrical connector (80) to the third busbar (50) is located at one end of the third busbar (50) along the first direction (a).

6. The negative electrode connection structure according to claim 5, characterized in that, The sub-connector (71) includes: The first metal strip (711) has two ends connected to the connection ends of the first busbar (20) and the second busbar (30) respectively, and the first metal strip (711) is bent. The second metal strip (712) has two ends connected to the connection ends of the first busbar (20) and the second busbar (30), respectively. The second metal strip (712) is bent, and the curvature of the second metal strip (712) is different from that of the first metal strip (711).

7. The negative electrode connection structure according to claim 5, characterized in that, The plurality of negative electrode probe assemblies (10) electrically connected to the same sub-bus (21) include: A first negative electrode probe assembly (11) has a first electrical connection plate (111) extending along a second direction (b) perpendicular to the first direction (a). A second negative electrode probe assembly (12) having a second electrical connection plate (121) extending along a second direction (b); A third negative electrode probe assembly (13) has a third electrical connection plate (131) extending along the second direction (b), and the third electrical connection plate (131), the second electrical connection plate (121) and the first electrical connection plate (111) are arranged at intervals along the first direction (a); The sub-busbar (21) has: The first sub-bus section (211) extends along the first direction (a) and extends from the first electrical connection plate (111) to the second electrical connection plate (121). One end of the first sub-bus section (211) is electrically connected to the first electrical connection plate (111), and the other end is electrically connected to the second electrical connection plate (121). The second sub-bus section (212) extends along the first direction (a) and extends from the second electrical connection plate (121) to the third electrical connection plate (131). One end of the second sub-bus section (212) is electrically connected to the second electrical connection plate (121), and the other end is electrically connected to the third electrical connection plate (131). The third sub-bus section (213) extends along the first direction (a) and extends from the third electrical connection plate (131) to the sub-connector (71). One end of the third sub-bus section (213) is electrically connected to the third electrical connection plate (131), and the other end is electrically connected to the sub-connector (71). The cross-sectional areas of the third sub-conductor segment (213), the second sub-conductor segment (212), and the first sub-conductor segment (211) decrease sequentially.

8. The negative electrode connection structure according to claim 5, characterized in that, The plurality of said AC-DC power modules (60) include: A first AC-DC power supply module (61) has a first negative terminal connection plate at its output negative terminal port. The second AC-DC power supply module (62) has a second negative terminal connection plate at its output negative terminal port; The third AC-DC power supply module (63) has a third negative connection plate at its output negative port. The first negative connection plate, the second negative connection plate and the third negative connection plate are arranged at intervals along the first direction (a). The third bus (50) includes: First busbar (51), the first busbar (51) extends along the first direction (a) and extends from the first negative electrode connection plate to the second negative electrode connection plate, one end of the first busbar (51) is electrically connected to the first negative electrode connection plate and the other end is electrically connected to the second negative electrode connection plate; The second busbar (52) extends along the first direction (a) and extends from the second negative electrode connection plate to the third negative electrode connection plate. One end of the second busbar (52) is electrically connected to the second negative electrode connection plate, and the other end is electrically connected to the third negative electrode connection plate. The third busbar (53) extends along the first direction (a) and extends from the third negative electrode connection plate to the second electrical connector (80). One end of the third busbar (53) is electrically connected to the third negative electrode connection plate, and the other end is electrically connected to the second electrical connector (80). The cross-sectional areas of the third confluence segment (53), the second confluence segment (52), and the first confluence segment (51) decrease sequentially.

9. A battery production equipment, characterized in that, include: The negative electrode connection structure as described in any one of claims 1-8.

10. The battery production equipment according to claim 9, characterized in that, The negative terminal connection structure includes: multiple AC-DC power supply modules (60); Each of the AC-DC power modules (60) has a positive output port; Each of the DC-DC power supply modules (40) has an output positive port and an input positive port; The battery production equipment also includes: Multiple positive electrode probe assemblies (90) are all disposed on the mounting bracket; The fourth bus (100) is disposed on the mounting bracket. The positive output port of each AC-DC power module (60) is electrically connected to the connection terminal of the fourth bus (100), and the positive input port of each DC-DC power module (40) is electrically connected to the connection terminal of the fourth bus (100).

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