Output pole piece seat and battery pack with same

Abstract

The utility model provides an output pole piece seat and a battery pack with the same. The output pole piece seat comprises a terminal fixing seat and a terminal assembly, at least part of the terminal fixing seat and the to-be-fixed component are arranged at intervals to form an avoiding groove, and the avoiding groove is communicated with the mounting groove; the inner groove wall of the mounting groove is in clearance fit with the terminal assembly, so that a first waterproof space is formed between the inner groove wall and the terminal assembly; a second waterproof space is formed in an inner cavity of the avoiding groove; the second waterproof space is communicated with the first waterproof space; the first waterproof space and the second waterproof space are used for filling the waterproof filling part; the fixed end is provided with an inlet, and the inlet is communicated with the second waterproof space, so that the waterproof filling part enters the second waterproof space and the first waterproof space through the inlet. According to the battery pack, the problem that the waterproof performance of the joint of the terminal assembly and the control device in the battery pack in the prior art is poor is solved.

Description

[0001] The application claims priority to the Chinese Utility Model Patent Application No. CN202520348339.4, filed on February 28, 2025, and entitled "Battery Pack". TECHNICAL FIELD

[0002] The utility model relates to battery pack technical field, specifically, relate to an output pole piece seat and have its battery pack. BACKGROUND

[0003] At present, the electrical connection inside the battery pack usually needs to be carried out through exposed terminals. In order to enable the terminals of the tool pole piece battery pack to be connected, an opening is usually provided at the shell of the battery pack, so that the tool pole piece can extend into the battery pack through the opening and realize mutual connection with the terminals.

[0004] However, the battery pack may be subjected to external environmental factors such as rain, dust or moisture in different application occasions. These moisture or external pollutants are easy to enter the terminal through the opening and penetrate into the connection between the terminal and the control panel, thereby causing the control panel to be damaged by moisture or external pollutants, affecting the safety performance of the control panel, and causing the control panel to malfunction. The existing waterproof method of the battery pack terminal usually adopts waterproof treatment of each component respectively and then assembles together. During the assembly process, the waterproof material may be scratched and damaged, resulting in a short circuit probability after assembly. Moreover, the assembly steps are complicated, which reduces the production efficiency. SUMMARY

[0005] Therefore, the purpose of the utility model is to provide an output pole piece seat and a battery pack with the same.

[0006] In order to achieve the above purpose, the technical scheme provided by an embodiment of the utility model is as follows:

[0007] An output pole base comprises: a terminal fixing base comprising a main body part and a fixing end connected to each other, the main body part is provided with a mounting groove, and the fixing end is used for connecting with a component to be fixed; a terminal assembly arranged in the mounting groove; wherein at least part of the terminal fixing base is arranged in space with the component to be fixed to form an avoiding groove, the avoiding groove and the mounting groove are communicated with each other; the inner groove wall of the mounting groove is in clearance fit with the terminal assembly to form a first waterproof space between the inner groove wall and the terminal assembly; the inner cavity of the avoiding groove forms a second waterproof space; the second waterproof space is communicated with the first waterproof space; the first waterproof space and the second waterproof space are both used for filling waterproof filling parts; the fixing end is provided with an inlet, the inlet is communicated with the second waterproof space, so that the waterproof filling parts enter the second waterproof space and the first waterproof space through the inlet. In this way, through the design of the inlet, the waterproof filling parts can be smoothly filled into the second waterproof space, and then filled into the first waterproof space, forming a complete waterproof layer. And in this way, after the output pole base is assembled, the waterproof filling parts can be injected once through the inlet, and the material is naturally filled into the two communicating spaces under the driving of gravity or pressure, reducing manual intervention, especially suitable for automatic production line application, at the same time, the double space forms a continuous sealing layer, avoiding the risk of leakage caused by local unfilled, if the filling material shrinks or cracks after solidification, it can be repaired by injecting glue through the inlet again, without disassembling the components, compared with the method of waterproof treatment for each component respectively, this can improve the accuracy and effectiveness of waterproof filling, and simplify the operation steps.

[0008] Further, the waterproof filling parts are arranged in the first waterproof space and the second waterproof space through a vacuum coating process; wherein: the minimum distance between at least part of the terminal fixing base and the component to be fixed is greater than or equal to 0.5mm; and / or, the height of the inlet is greater than or equal to 0.5mm along the direction from the main body part to the fixing end. In this way, it can be ensured that the waterproof material uniformly and tightly covers the predetermined area to form a waterproof layer without pores. Through the inlet, the one-way injection of coating material vapor is realized, the material flow is driven by vacuum negative pressure, the filling efficiency is improved, it is ensured that the coating material vapor fully diffuses in the avoiding groove, avoids that the vapor flow is blocked due to too small distance, forms a coating blind area, at the same time, the vapor inflow cross-sectional area is expanded (the cross-sectional area is positively correlated with the height), the coating deposition rate is improved, and it is ensured that the filling material fully penetrates, and it is also avoided that the material consumption increases sharply due to too large gap.

[0009] Further, the waterproof filling part is arranged in the first waterproof space and the second waterproof space through a low-pressure injection molding process; wherein: the minimum distance between at least part of the terminal fixing seat and the component to be fixed is greater than or equal to 0.8 mm; and / or, the height of the entrance in the direction from the main body part to the fixed end is greater than or equal to 0.8 mm. Low-pressure injection molding can better fill the gap and avoid the problem of excessive extrusion of materials and structural deformation that may be caused by high-pressure injection molding. The low-pressure injection molding process can not only ensure the waterproof performance, but also reduce material waste and production cost. Similarly, the minimum distance between at least part of the terminal fixing seat and the component to be fixed and the height of the entrance provide sufficient space for the smooth injection of waterproof materials, ensuring that the waterproof materials can also smoothly enter and fill the waterproof space under low-pressure conditions, reducing bubbles and cavities during the filling process, and improving the integrity and airtightness of the waterproof layer.

[0010] Further, the waterproof filling part is arranged in the first waterproof space and the second waterproof space through a low-pressure injection molding process; wherein: the minimum distance between at least part of the terminal fixing seat and the component to be fixed is greater than or equal to 0.8 mm; and / or, the height of the entrance in the direction from the main body part to the fixed end is greater than or equal to 0.8 mm. Low-pressure injection molding can better fill the gap and avoid the problem of excessive extrusion of materials and structural deformation that may be caused by high-pressure injection molding. The low-pressure injection molding process can not only ensure the waterproof performance, but also reduce material waste and production cost. Similarly, the minimum distance between at least part of the terminal fixing seat and the component to be fixed and the height of the entrance provide sufficient space for the smooth injection of waterproof materials, ensuring that the waterproof materials can also smoothly enter and fill the waterproof space under low-pressure conditions, reducing bubbles and cavities during the filling process, and improving the integrity and airtightness of the waterproof layer.

[0011] Further, the fixed end is a columnar structure; the height of the columnar structure in the direction from the main body part to the fixed end is greater than or equal to 0.5 mm and less than or equal to 3 mm. The columnar structure can provide more stable support and connection due to its high structural rigidity, especially when the battery pack is subjected to vibration or impact, effectively preventing displacement of the terminal assembly and ensuring the reliability of electrical connection.

[0012] Further, the fixed end is a protruding block structure, and the protruding block structure protrudes away from the main body part on the side of the fixed end; the protruding block structure is at least two, and the two protruding block structures in the at least two protruding block structures are arranged at intervals to form an entrance between the two protruding block structures with an interval space. The interval arrangement of the protruding block structure not only provides stable support, but also disperses the stress of the fixed end, avoiding structural fatigue or damage caused by single-point stress concentration. By accurately controlling the distance between the protruding block structures, the size of the entrance can be adjusted to ensure that the waterproof material does not overflow during the filling process, while achieving sufficient thickness to form airtight waterproof layer, effectively preventing water intrusion and improving waterproof performance.

[0013] Further, the terminal fixing seat is further provided with a guide slot for guiding the insertion of the tool pole piece, the guide slot is located at one side of the terminal assembly and communicates with the mounting slot.

[0014] Further, the guide slot is correspondingly provided with the mounting slot; the terminal fixing seat is provided with a plurality of limiting members, the plurality of limiting members are spaced apart along a preset direction, and the guide slot is formed between adjacent two limiting members. The limiting member can accurately limit the position of the tool pole piece, ensure the stability and accuracy of the tool pole piece during the installation process, and reduce the installation error.

[0015] The utility model further provides a kind of battery pack, comprising: the output pole piece seat described above. Due to the application of waterproof space and waterproof filling portion in output pole piece seat, the waterproof performance of electrical connection piece inside battery pack is significantly improved, electrical failure caused by moisture intrusion is effectively prevented, and the overall reliability and safety of battery pack are improved.

[0016] Further, the battery pack further comprises: a housing assembly having a receiving cavity, the output pole piece seat is arranged in the receiving cavity; the housing assembly is provided with an opening for mounting the output pole piece seat; and / or a control device, the control board of the control device forms a component to be fixed; the control board at least has a control module and a communication module, and the terminal assembly is connected with the control board. The housing assembly provides a layer of protection for the internal components, preventing external physical damage, and also has the functions of dustproof and waterproof, further improving the reliability and service life of the battery pack, enhancing the structural stability of the battery pack, and reducing the displacement or damage of internal components caused by external impact or vibration. The integrated control module and communication module on the control board can monitor and adjust the voltage, current and temperature parameters of the battery pack in real time, ensuring the efficient operation and safety of the battery pack under various working conditions.

[0017] The utility model has the following beneficial effects: through the design of the inlet, waterproof filling part can be ensured to enter and fill to the second waterproof space, and then communicate with the first waterproof space, form complete waterproof layer. Waterproof filling part can fill in these spaces, and thus form a tight waterproof barrier, isolate the erosion of moisture to electrical connecting piece, effectively prevent short circuit and electrical fault. And this can be completed after the assembly of the output pole piece seat, and the waterproof filling part is injected through the inlet once, and the material is filled in the two communication spaces under the driving of gravity or pressure, reduces manual intervention, especially suitable for automatic production line application, and the double space forms a continuous sealing layer, avoids the leakage risk caused by local unfilled, if the filling material shrinks or cracks after solidification, can be repaired through the inlet twice, need not to disassemble the part, compared with the waterproof treatment method for each part respectively, can improve the accuracy and effectiveness of waterproof filling, simple operation steps. In addition, the mutual connection of the main part and the fixed end forms a stable support structure, ensures the firm fixation of the terminal assembly in the battery pack, avoids the connection loosening caused by vibration or impact, improves the stability of electrical connection. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments in the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0019] Figure 1 The front view of the output electrode seat provided by the embodiment of the application is provided.

[0020] Figure 2 The partial perspective view of the output electrode seat provided by the embodiment of the application is provided.

[0021] Figure 3 The top perspective view of the battery pack provided by the embodiment of the application is provided.

[0022] Figure 4 The bottom perspective view of the battery pack provided by the embodiment of the application is provided.

[0023] Figure 5 The internal structure diagram of the battery pack provided by the embodiment of the application is provided.

[0024] Figure 6 The explosion diagram of the internal structure of the battery pack provided by the embodiment of the application is provided.

[0025] Figure 7 The structural schematic diagram of a unit cell provided by the embodiment of the application is provided.

[0026] Figure 8 This is a schematic diagram of another cell structure provided in an embodiment of this application;

[0027] Figure 9 A perspective view of the first end face of a waterproof plate of a battery pack provided in an embodiment of this application;

[0028] Figure 10 A perspective view of the second end face of the waterproof plate of another battery pack provided in an embodiment of this application;

[0029] Figure 11 A perspective view of the second end face of the waterproof plate of the battery pack provided in an embodiment of this application;

[0030] Figure 12 A waterproof membrane for a battery pack provided in this application embodiment Figure 9 A magnified sectional view of point A in the middle;

[0031] Figure 13 Another waterproof membrane for a battery pack provided in this application embodiment is in Figure 9 A magnified sectional view of point A in the middle;

[0032] Figure 14 A schematic diagram illustrating the assembly relationship of a partial waterproofing membrane, waterproofing layer, battery cell support, and unit battery cell, provided for an embodiment of this application;

[0033] Figure 15 A schematic diagram showing the assembly relationship of a partial waterproofing membrane, waterproofing layer, battery cell support, and unit battery cell, provided for an embodiment of this application;

[0034] Figure 16 This is a partial schematic diagram of the internal structure of the battery pack after the waterproof plate and waterproof layer are hidden, as provided in an embodiment of this application.

[0035] Figure 17 This is an internal structural diagram of the battery pack provided in an embodiment of this application from another perspective;

[0036] Figure 18 A perspective view of the connector provided in the embodiments of this application;

[0037] Figure 19 A front view of the first welding socket provided in an embodiment of this application;

[0038] Figure 20 A front view of the second welding socket provided in an embodiment of this application;

[0039] Figure 21 The temperature change data of the 60V battery cell and its end face under the 30A discharge mode provided in the embodiments of this application are shown in the figure.

[0040] Wherein, the above-mentioned drawings include the following reference signs:

[0041] 1, housing assembly; 11, first heat dissipation port; 13, opening; 14, second heat dissipation port; 15, third heat dissipation port; 16, locking position; 113, drainage port;

[0042] 2, battery cell assembly; 21, unit battery cell; 211, first battery cell end face; 2111, positive electrode end face; 2112, negative electrode end face; 2113, isolation piece; 21111, cap end face; 212, second battery cell end face; 22, battery cell support; 221, accommodating groove; 222, exposed hole; 223, first end; 224, second end; 225, limiting part; 2251, locking piece; 226, positioning piece; 23, waterproof layer; 24, waterproof piece; 241, first end face; 2411, first convex surface; 242, second end face; 2421, second convex surface;

[0043] 3, output tab seat; 32, terminal assembly; 33, terminal fixing seat; 331, lead groove; 332, fixed end; 3321, first fixed end face; 3322, second fixed end face; 333, waterproof space; 3331, first waterproof space; 3332, second waterproof space; 33321, inlet; 334, mounting groove; 3341, inner groove wall; 335, main body part; 336, limiting piece;

[0044] 4, control device; 41, control board; 411, second solder pad; 42, connecting piece; 421, single battery cell detection piece; 4211, first connecting end; 4212, second connecting end; 42121, first solder pad; 42122, through hole; 422, connecting tab. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0047] It should be noted that like reference numerals and letters refer to like items in the several views, and that no further definitions and explanations of a certain item are required in the subsequent drawings once the item has been defined in one drawing.

[0048] In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0049] In the description of the embodiments of the present application, it should be understood that unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the description of the embodiments of the present application, it should be understood that the "first", "second", etc. used in this paper do not mean to specially indicate the order or sequence, nor to limit the case, but only to distinguish the components or operations described by the same technical terms.

[0051] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0052] The technical solutions in the present application will be described below with reference to the drawings.

[0053] In order to solve the problem of poor waterproof performance of the connection between the terminal assembly and the control device in the battery pack in the prior art, the present application provides an output pole piece seat and a battery pack with the same. Wherein, the battery includes a shell assembly 1, and the output pole piece seat 3 is arranged in the shell assembly 1.

[0054] In order to achieve the above purpose, the technical scheme provided by an embodiment of the present application is as follows:

[0055] As Figure 3 and Figure 5As shown, the shell assembly 1 has a receiving cavity, and the output tab seat 3 is arranged in the receiving cavity. The shell assembly 1 is provided with an opening 13 for mounting the output tab seat 3.

[0056] In a specific embodiment, the opening 13 is arranged on the shell assembly 1 corresponding to the output tab seat 3, for the tool tab to pass through the opening 13 and be connected with the output tab seat 3.

[0057] As shown, Figure 5 in the present application, the battery pack further comprises a cell assembly 2 arranged in the receiving cavity. The shell assembly 1 has a bracket fixing seat (not shown in the figure) arranged on at least one side of the shell assembly 1 to fix the cell assembly 2.

[0058] Specifically, as shown, Figure 6 the cell assembly 2 comprises at least one cylindrical unit cell 21 and a cell bracket 22 fixed firmly on the bracket fixing seat in the shell assembly 1 by means of welding or screw connection, etc., to provide additional structural support and shock protection.

[0059] Specifically, as shown, Figure 16 the cell bracket 22 has a receiving groove 221 accommodating the unit cell 21, the first end of the receiving groove 221 has a notch for the unit cell 21 to extend into, and the second end of the receiving groove 221 has an exposed hole 222 penetrating through the cell bracket 22, the hole cross-sectional area of the exposed hole 222 is smaller than the cross-sectional area of the receiving groove 221 parallel to the exposed hole 222, and the hole cross-sectional area of the exposed hole 222 is smaller than the maximum area of the first cell end face 211 extending into the receiving groove 221.

[0060] It should be noted that the hole cross-sectional area of the exposed hole 222 is constant along the extension direction of the exposed hole 222 itself. The cross-sectional area of the receiving groove 221 is constant along the extension direction of the receiving groove 221 itself.

[0061] In the present application, as shown, Figure 5 , Figure 17 and Figure 18 the battery pack further comprises a control device 4 arranged in the receiving cavity, and the control board 41 of the control device 4 has at least a control module and a communication module. The control module is used to adjust the voltage, current and temperature parameters in the battery pack to ensure the safe and efficient operation of the entire system, and the communication module is used to exchange data with external devices to realize the monitoring of the working state of the battery pack.

[0062] Specifically, the control device 4 is arranged on the cell bracket 22, and the control device 4 has a connecting piece 42, and the control board 41 is connected with the unit cell 21 through the connecting piece 42 from the exposed hole 222 to realize at least the communication and control functions.

[0063] As Figure 1 and Figure 2 The utility model provides a kind of output pole seat 3, which is provided by the utility model as shown in the drawings.The output pole seat 3 includes a terminal fixing seat 33 and a terminal assembly 32.The terminal fixing seat 33 includes a main body portion 335 and a fixed end 332 connected to each other, the main body portion 335 is provided with a mounting groove 334, and the fixed end 332 is used to be connected with a component to be fixed.The terminal assembly 32 is arranged in the mounting groove 334.The connection between the main body portion 335 and the fixed end 332 of the terminal fixing seat 33 provides stable support and positioning for the terminal assembly 32, ensuring the stability and reliability of the electrical connection and being unaffected by external vibration or impact.

[0064] Specifically, the terminal fixing seat 33 has a waterproof space 333, which includes a first waterproof space 3331 and a second waterproof space 3332.The design of the first waterproof space 3331 and the second waterproof space 3332 provides a clear path and space for the filling of the waterproof filling part, ensuring that the waterproof material can be uniformly filled in all areas that need to be protected, and improving the filling efficiency and waterproof performance of the waterproof material.

[0065] Specifically, the control board 41 of the control device 4 forms a component to be fixed.The terminal assembly 32 is connected with the control board 41.The control module and the communication module integrated on the control board 41 can monitor and regulate the working state of the battery pack in real time, ensuring the safety of the system, and providing efficient communication capability with external equipment, thereby improving the intelligent level of the battery pack.

[0066] Specifically, at least part of the terminal fixing seat 33 is spaced apart from the component to be fixed to form an avoidance groove, and the avoidance groove and the mounting groove 334 are in communication with each other;the inner groove wall 3341 of the mounting groove 334 is in clearance fit with the terminal assembly 32 to form a first waterproof space 3331 between the inner groove wall 3341 and the terminal assembly 32;the inner cavity of the avoidance groove forms a second waterproof space 3332;the second waterproof space 3332 is in communication with the first waterproof space 3331;the first waterproof space 3331 and the second waterproof space 3332 are both used for filling the waterproof filling part.In this way, the waterproof space 333 formed by the clearance fit between the avoidance groove and the mounting groove 334 can effectively prevent the intrusion of water, especially the second waterproof space 3332 as an additional waterproof layer, even if the first waterproof space 3331 around the terminal assembly 32 is damaged, it can also provide additional waterproof protection to ensure the safety of the electrical connection.

[0067] Specifically, the avoidance groove is located on the side of the fixed end 332 away from the terminal assembly 32.The position of the side of the avoidance groove away from the terminal assembly 32 provides a smooth path for the waterproof material to enter the waterproof space 333 from the direction of the fixed end 332, facilitating the filling of the waterproof material and improving the filling efficiency.

[0068] Specifically, the first waterproof space 3331 is the assembly gap between the terminal fixing seat 33 and the terminal assembly 32 when the terminal fixing seat 33 limits the terminal assembly 32, and the second waterproof space 3332 is the assembly gap between the terminal fixing seat 33 and the control device 4.

[0069] Specifically, the first end of the fixed end 332 is connected to the terminal fixing seat 33, and the second end is connected to the control device 4. The fixed end 332 props up the main body part 335, so that the main body part 335 does not contact the control device 4. The second waterproof space 3332 is the projection area of the main body part 335 on the control device 4, and is also the non-contact space between the main body part 335 and the control device 4.

[0070] Specifically, the fixed end 332 is provided with an inlet 33321, which is in communication with the second waterproof space 3332, so that the waterproof filling part enters the second waterproof space 3332 and the first waterproof space 3331 through the inlet 33321.

[0071] Due to the provision of the inlet 33321, the waterproof filling part can be smoothly filled into the second waterproof space 3332 and then into the first waterproof space 3331, forming a complete waterproof layer. In this way, after the output pole piece seat 3 is assembled, the waterproof filling part can be injected once through the inlet 33321, and the material can be naturally filled into the two connected first waterproof space 3331 and second waterproof space 3332 under the driving of gravity or pressure, reducing manual intervention, especially suitable for automatic production line application. At the same time, the double space forms a continuous sealing layer, avoiding the risk of leakage caused by local non-filling. If the filling material shrinks or cracks after solidification, it can be repaired by injecting the material again through the inlet 33321 without disassembling the parts. Compared with the method of waterproofing each part respectively, this method can improve the accuracy and effectiveness of waterproof filling and simplify the operation steps.

[0072] Specifically, the inlet 33321 is at least one. The at least one inlet 33321 is located between the terminal fixing seat 33 and the control device 4. The position of the inlet 33321 is designed to facilitate the waterproof filling part to quickly and uniformly penetrate and fill the second waterproof space 3332 during the operation process, so as to fully fill the second waterproof space 3332, thereby achieving efficient waterproof effect during installation and maintenance, maintaining the safe operation of the control device 4 for a long time, and providing a basic waterproof barrier for the terminal assembly 32 to protect the internal structure from moisture and pollutants, thereby preventing the control panel from malfunctioning.

[0073] In a specific embodiment, the fixed end 332 has oppositely arranged first and second fixed end faces 3321 and 3322, and the inlet port 33321 is one, which is arranged on any one of the first and second fixed end faces 3321 and 3322. By arranging only one inlet port 33321, the path of the waterproof filling part into the waterproof space 333 is simplified, the process steps are reduced, the production efficiency is improved, the manufacturing cost is reduced, and the uniform filling of the waterproof material is ensured.

[0074] In an embodiment not shown in the figure, the fixed end 332 has oppositely arranged first and second fixed end faces 3321 and 3322, and the inlet port 33321 is two, which is arranged on any one of the first and second fixed end faces 3321 and 3322. The two spaced inlet ports 33321 can simultaneously or multi-point introduce waterproof material, accelerate the filling process of waterproof material, improve production efficiency, and multi-point introduction helps uniform distribution of waterproof material and enhances waterproof effect.

[0075] In a specific embodiment, the fixed end 332 has oppositely arranged first and second fixed end faces 3321 and 3322, and the inlet port 33321 is two, which is arranged on the first and second fixed end faces 3321 and 3322, respectively. The inlet port 33321 corresponding to the end face provides a wider flow space for the waterproof material, which helps the waterproof material to uniformly cover the waterproof space 333, and ensures effective filling of the waterproof material even in complex geometric areas.

[0076] Specifically, the waterproof filling part is waterproof material.

[0077] In a specific embodiment, the waterproof filling part is arranged in the first and second waterproof spaces 3331 and 3332 by a vacuum coating process. In the vacuum coating process and under the condition of overall size compression of the battery pack, the waterproof material can better fill the second waterproof space 3332, avoiding the situation that the center area of the second waterproof space 3332 is not filled, and the uneven distribution of the waterproof material in the second waterproof space 3332.

[0078] Specifically, the minimum distance between at least part of the terminal fixing seat 33 and the component to be fixed is greater than or equal to 0.5 mm. One-way injection of plating material vapor is achieved through the inlet port 33321, material flow is driven by vacuum negative pressure, filling efficiency is improved, and plating material vapor is ensured to fully diffuse in the avoidance groove. Avoiding the blockage of vapor flow due to too small distance, forming a plating blind area, at the same time, expanding the vapor inflow cross-sectional area (the cross-sectional area is positively correlated with the minimum distance between at least part of the terminal fixing seat 33 and the component to be fixed), improving the plating deposition rate, ensuring that the filling material fully penetrates, and avoiding the excessive use of materials due to too large gap.

[0079] Specifically, the height of the inlet port 33321 in the direction from the main body part 335 to the fixed end 332 is greater than or equal to 0.5 mm. One-way injection of plating material vapor is achieved through the inlet port 33321, material flow is driven by vacuum negative pressure, filling efficiency is improved, and plating material vapor is ensured to fully diffuse in the avoidance groove. Avoiding the blockage of vapor flow due to too small distance, forming a plating blind area, at the same time, expanding the vapor inflow cross-sectional area (the cross-sectional area is positively correlated with the height of the inlet port 33321), improving the plating deposition rate, ensuring that the filling material fully penetrates, and avoiding the excessive use of materials due to too large gap.

[0080] Specifically, the minimum distance between at least part of the terminal fixing seat 33 and the component to be fixed is greater than or equal to 0.5 mm. The height of the inlet port 33321 in the direction from the main body part 335 to the fixed end 332 is greater than or equal to 0.5 mm.

[0081] In a specific embodiment, the waterproof filling part is arranged in the first waterproof space 3331 and the second waterproof space 3332 by a low-pressure injection molding process. In the case of low-pressure injection molding process and compression of the overall size of the battery pack, the waterproof material can better fill the second waterproof space 3332, avoiding the situation that the center area of the second waterproof space 3332 is not filled, and the waterproof material in the second waterproof space 3332 is unevenly distributed.

[0082] Specifically, the minimum distance between at least part of the terminal fixing seat 33 and the component to be fixed is greater than or equal to 0.8 mm.

[0083] Specifically, the height of the inlet port 33321 in the direction from the main body part 335 to the fixed end 332 is greater than or equal to 0.8 mm.

[0084] Specifically, the minimum distance between at least part of the terminal fixing seat 33 and the component to be fixed is greater than or equal to 0.8 mm. The height of the inlet port 33321 in the direction from the main body part 335 to the fixed end 332 is greater than or equal to 0.8 mm.

[0085] In an embodiment, the waterproof filling part is arranged in the first waterproof space 3331 and the second waterproof space 3332 by a glue-filling process. In the glue-filling process and the compression of the overall size of the battery pack, the waterproof material can be better filled in the second waterproof space 3332, avoiding the situation that the center area of the second waterproof space 3332 is not filled, and the waterproof material in the second waterproof space 3332 is unevenly distributed.

[0086] Specifically, the minimum distance between at least part of the terminal fixing seat 33 and the component to be fixed is greater than or equal to 0.5 mm.

[0087] Specifically, the height of the entrance 33321 in the direction from the main body part 335 to the fixed end 332 is greater than or equal to 0.5 mm.

[0088] Specifically, the minimum distance between at least part of the terminal fixing seat 33 and the component to be fixed is greater than or equal to 0.5 mm. The height of the entrance 33321 in the direction from the main body part 335 to the fixed end 332 is greater than or equal to 0.5 mm.

[0089] In an embodiment, the fixed end 332 is a columnar structure. Due to the stability of the geometric shape, the columnar structure can provide a more stable connection, especially when subjected to external pressure or vibration, reducing the possibility of relative displacement between the fixed end 332 and the component to be fixed.

[0090] Specifically, the height of the columnar structure in the direction from the main body part 335 to the fixed end 332 is greater than or equal to 0.5 mm and less than or equal to 3 mm.

[0091] In another embodiment, the fixed end 332 is a protruding block structure, and the protruding block structure protrudes away from the main body part 335 on the side of the fixed end 332.

[0092] Specifically, the protruding block structure is at least two, and the two protruding block structures in the at least two protruding block structures are arranged at intervals to form an entrance 33321 between the two protruding block structures with an interval space. The design of the protruding block structure not only provides the entrance 33321 for the waterproof material, but also enhances the stability of the contact surface between the terminal fixing seat 33 and the component to be fixed, disperses the stress at the connection, and improves the structural reliability for long-term use.

[0093] In the present application, the terminal fixing seat 33 is also provided with a guide groove 331 for guiding the insertion of the tool pole piece, and the guide groove 331 is located on one side of the terminal assembly 32 and communicates with the mounting groove 334. The guide groove 331 is used to guide the tool pole piece to be inserted in the correct insertion direction to avoid short circuit caused by incorrect installation, and can also stabilize the tool pole piece to ensure its effective connection with the control device 4.

[0094] Specifically, the guide slot 331 is provided in a number corresponding to the number of the mounting slots 334; the terminal fixing seat 33 is provided with a plurality of limiting pieces 336, the plurality of limiting pieces 336 are arranged at intervals along a predetermined direction, and the guide slot 331 is formed between adjacent two limiting pieces 336. The limiting piece 336 can stabilize the tool pole piece, ensure the stability during insertion, avoid the loosening of the electrical connection caused by vibration or external interference, and enhance the reliability and stability of the electrical connection.

[0095] As shown in Figures 3 to 5 The shell assembly 1 has a first heat dissipation port 11 and a second heat dissipation port 14, the second heat dissipation port 14 is arranged on the side of the battery pack with the opening 13, and the first heat dissipation port 11 is arranged on the surface of the shell assembly 1 opposite to the second heat dissipation port 14. The first heat dissipation port 11 is an air inlet, and the second heat dissipation port 14 is an air outlet. By arranging the first heat dissipation port 11 and the second heat dissipation port 14 to form a linear air channel, the direct ventilation path helps the airflow to pass through the battery pack more efficiently, ensuring that the internal temperature of the battery pack is always maintained within a safe range, significantly improving the heat dissipation efficiency and reducing the risk of explosion caused by overheating of the battery cells. The total area of the first heat dissipation port 11 is larger than the total area of the second heat dissipation port 14. After the airflow enters the shell assembly 1 through the first heat dissipation port 11, it is discharged from the second heat dissipation port 14. The larger area of the first heat dissipation port 11 is conducive to the intake of more cold air, so that the cold air can fully contact the battery cell assembly 2.

[0096] In an embodiment, the shell assembly 1 further has a third heat dissipation port 15, which is located on any one side of the shell assembly 1 except the side where the first heat dissipation port 11 and the second heat dissipation port 14 are located, for allowing the airflow on that side to enter the battery pack. The airflow passing through the third heat dissipation port 15 and the airflow passing through the first heat dissipation port 11 are combined into a single airflow that is discharged from the second heat dissipation port 14. By increasing the third heat dissipation port 15, airflows from different directions can enter the battery pack, and the heat of the battery cell assembly 2 can be more evenly distributed, avoiding local overheating. The convergence of the airflows inside can more comprehensively and efficiently cover the surface of the battery cells, maintain the overall heat balance, and further improve the heat dissipation capacity of the battery pack. Not only does this increase the air flow and improve the efficiency of internal heat exchange, but it also allows the battery pack to still dissipate heat sufficiently through other inlets even if one of the heat dissipation ports is partially blocked by external factors, ensuring the reliability of the heat dissipation system. This multi-inlet single-outlet heat dissipation method helps to reduce the surface temperature of the battery cells more quickly.

[0097] In an embodiment, the shell assembly 1 further has a third heat dissipation port 15, which is located on any two opposite side surfaces of the shell assembly 1 except the surfaces where the first heat dissipation port 11 and the second heat dissipation port 14 are located, for allowing air flow to enter the battery pack from the opposite side surfaces, and the air flow passing through the third heat dissipation port 15 and the air flow passing through the first heat dissipation port 11 form a flow that is discharged from the second heat dissipation port 14. By increasing the third heat dissipation port 15, air flow in different directions can enter the battery pack, and the heat of the cell assembly 2 can be more evenly dispersed, avoiding the phenomenon of local overheating. The intersection of the air flow inside can more comprehensively and efficiently cover the surface of the cell, maintain the overall heat balance, and further improve the heat dissipation capacity of the battery pack. Not only does it increase the air flow and improve the efficiency of internal heat exchange, but it also enables the battery pack to still be sufficiently cooled through other inlets even if one of the heat dissipation ports is partially blocked by external factors, ensuring the reliability of the heat dissipation system. This multi-inlet single-outlet heat dissipation method helps to more quickly reduce the surface temperature of the cell.

[0098] In an embodiment, the total area of the third heat dissipation port 15 is less than or equal to the total area of the second heat dissipation port 14, solving the problem of local overheating caused by a single air flow direction. Air flow in the transverse or other directions can sufficiently flow in, ensuring that each part of the cell is evenly cooled, preventing performance loss or risks caused by local high temperatures, and the fine layout of the heat dissipation ports can better control the temperature gradient of different areas of the device. The multi-inlet single-outlet layout ensures sufficient air flow and cooling effect when one of the heat dissipation ports fails due to external blocking or other problems, thereby ensuring the sustainability and reliability of the system.

[0099] In an embodiment, the total area of the third heat dissipation port 15 is greater than the total area of the second heat dissipation port 14, solving the problem of local overheating caused by a single air flow direction. Air flow in the transverse or other directions can sufficiently flow in, ensuring that each part of the cell is evenly cooled, preventing performance loss or risks caused by local high temperatures, and the fine layout of the heat dissipation ports can better control the temperature gradient of different areas of the device. The multi-inlet single-outlet layout ensures sufficient air flow and cooling effect when one of the heat dissipation ports fails due to external blocking or other problems, thereby ensuring the sustainability and reliability of the system.

[0100] In an embodiment, the second heat dissipation port 14 is arranged in the middle region of the side of the shell assembly 1 having the opening 13 and opposite to the first heat dissipation port 11, so that the air flow can more evenly cover the surface of the cell assembly 2, and the air flow distribution spreading from the center to the periphery reduces the problem of local heat concentration, helping to maintain the temperature uniformity inside the battery pack.

[0101] In an embodiment, the second heat dissipation port 14 is arranged in the middle area of the side of the shell assembly 1 having the opening 13 and opposite to the first heat dissipation port 11, and is adjacent to the opening 13, so that the air flow can more evenly cover the surface of the battery cell assembly 2, and the air flow distribution spreading from the center to the periphery reduces the problem of local heat concentration, which helps to maintain the temperature uniformity inside the battery pack.

[0102] In an embodiment, the shell assembly 1 has a locking position 16 for tool locking of the battery pack to avoid movement of the battery pack, and the second heat dissipation port 14 is arranged in the middle area of the side of the shell assembly 1 having the opening 13 and opposite to the first heat dissipation port 11, and between the second heat dissipation port 14 and the locking position 16, so that the air flow can more evenly cover the surface of the battery cell assembly 2, and the air flow distribution spreading from the center to the periphery reduces the problem of local heat concentration, which helps to maintain the temperature uniformity inside the battery pack.

[0103] In an embodiment, the shell assembly 1 is combined in a two-piece form, and the shell assembly 1 is arranged as a concave shell with an opening on the top surface or any surface, and the end cover is connected to the shell from the opening side; the shell assembly 1 is combined in a three-piece form, and the shell assembly 1 is arranged as a through integral shell with openings on opposite sides, and the end cover is connected to the shell from the opening; the shell assembly 1 is combined in a four-piece form, and the shell assembly 1 is arranged as a through split shell with openings on opposite sides, and the shell can be buckled up and down, and the end cover is connected to the shell from the opening, and the assembly form of the shell assembly 1 is not limited.

[0104] In an embodiment, the shell assembly 1 further comprises a water draining port 113 arranged on at least one surface other than the surface of the battery pack having the opening 13 for draining water entering the shell assembly 1.

[0105] As shown in Figures 6 to 16 , the battery cell assembly 2 comprises unit battery cells 21, battery cell supports 22, waterproof layers 23, and waterproof members 24. The unit battery cells 21 are cylindrical battery cells having first battery cell end surfaces 211 and second battery cell end surfaces 212.

[0106] As shown in Figure 7 , in an embodiment, the first battery cell end surface 211 has a positive electrode end surface 2111, and the positive electrode end surface 2111 has a cap end surface 21111 which is outwardly convex in the positive electrode end surface 2111.

[0107] As shown in Figure 8 , in an embodiment, the first battery cell end surface 211 has a positive electrode end surface 2111, and the positive electrode end surface 2111 is a planar end surface.

[0108] As shown in Figure 7 , Figure 8 ,Figure 14 and Figure 15 As shown, in one embodiment, the first cell end face 211 has a positive terminal face 2111 and a negative terminal face 2112. An insulating member 2113 is provided between the negative terminal face 2112 and the positive terminal face 2111 to isolate the positive and negative terminals from contact and prevent short circuits. On the first cell end face 211, the edge of the negative terminal face 2112 near the central axis of the cell 21 is designated as the first edge. An exposed hole 222 exposes the first edge. The projected distance c between the first edge and the edge within the exposed hole 222 is greater than or equal to 0.1 mm. The gap between 222 and the first edge not only strengthens the insulation in structure, but also allows the waterproof layer 23 to cover the negative terminal 2112 and the insulating member 2113. Once the insulating member 2113 is damaged or fails due to aging, the waterproof layer 23 becomes an additional barrier to prevent moisture from entering the cell. At the same time, the waterproof layer 23 covers the negative terminal 2112 and the exposed hole 222, so that moisture will not seep into the cell end face from the assembly gap of the receiving groove 221 along the length of the cell. The positive terminal and negative terminal 2112 are in contact, thereby avoiding potential short circuits.

[0109] like Figure 6 As shown, the cell support 22 has a receiving groove 221, an exposed hole 222, a first end 223, and a second end 224. The first end 223 of the cell support 22 has a receiving groove 221 for accommodating a unit cell 21. One end of the receiving groove 221 has a slot for the unit cell 21 to extend into. The other end of the receiving groove 221 has an exposed hole 222 that penetrates the cell support 22. The area inside the exposed hole 222 is smaller than the cross-sectional area of ​​the receiving groove 221 parallel to the exposed hole 222. The area of ​​the exposed hole 222 is smaller than the maximum area of ​​the end face 211 of the first cell extending into the receiving groove 221. The shape of the exposed hole 222 includes, but is not limited to, circular, elliptical, and square shapes. The cell support 22 is firmly fixed to the bracket mounting base inside the housing assembly 1 by means of, but not limited to, welding or screw connection, to provide additional structural support and vibration protection.

[0110] like Figure 16 As shown, in one embodiment, the cell support 22 has a limiting part 225 that cooperates with the support fixing seat. The limiting part 225 has a locking member 2251. The locking member 2251 can be in the form of a screw hole and tightened by screws, or the locking member 2251 can be a first tenon structure and fastened by a second tenon structure on the outer shell assembly 1, or the limiting part 225 can be welded to the outer shell assembly 1, or locked by adhesive bonding, so as to ensure that the cell support 22 will not move in the outer shell assembly 1.

[0111] like Figure 14As shown, in one embodiment, the internal height d of the exposed hole 222 is greater than or equal to 0.5 mm and less than or equal to 2.5 mm. By setting the internal height d of the exposed hole 222 to be greater than or equal to 0.5 mm, effective support strength can be achieved for the unit cell 21, preventing the unit cell 21 from shifting position due to vibration or other external forces during normal use, thus improving the overall mechanical stability and safety of the battery pack. A height of less than or equal to 2.5 mm helps to avoid unnecessary material usage while strengthening the support strength, thereby optimizing the weight of the battery pack and further improving energy efficiency and range performance. This height range design takes into account the utilization rate of the internal space of the cell. While ensuring strong support, the reasonable setting of the hole height avoids unnecessary occupation of the effective space of the battery pack, allowing the battery pack to maximize capacitance and energy density within a limited space.

[0112] Specifically, the waterproof layer 23 is applied at the second end 224 of the cell support 22 by either potting or vacuum coating processes. The waterproof layer 23 covers the first cell end face 211 and the second cell end face 212 of the unit cell 21 to avoid short circuits caused by contact between the first cell end face 211 and the second cell end face 212 and external moisture.

[0113] like Figures 9 to 13 As shown, the waterproof component 24 is disposed at the second end 224 of the cell support 22. The waterproof component 24 has a first end face 241 away from the cell support 22 and a second end face 242 close to the cell support 22. There is at least a partial waterproof layer between the second end face 242 and the cell support 22. By adding the waterproof component 24, after the waterproof layer 23 is covered on the cell support 22, subsequent assembly work can be carried out without waiting for the waterproof layer to dry completely, which greatly improves the efficiency of the production line, reduces waiting time, and improves the flexibility and response speed of production.

[0114] like Figures 9 to 15 As shown, in one embodiment, the first end face 241 has a first convex surface 2411 at the exposed hole 222 that protrudes towards the end face of the unit cell 21, and the second end face 242 is flat. The waterproof component 24 has the first convex surface 2411 at the exposed hole 222. The waterproof component 24 is formed in the weak area of ​​the exposed hole 222. When the cell is in an abnormal overheating situation, there is usually a high pressure and high temperature flame in the area of ​​the first cell end face 211. At this time, the abnormal unit cell 21 can quickly break through the waterproof plate in the weak area, thereby providing a safe pressure release mechanism to avoid affecting the adjacent unit cells 21 or the adjacent cell assembly 2 and causing continuous deflagration.

[0115] like Figures 9 to 15As shown, in an embodiment, the first end surface 241 has a first convex surface 2411 protruding towards the end surface of the unit cell 21 at the exposed hole 222, and the second end surface 242 is a flat surface. The distance b between the first convex surface 2411 and the second end surface 242 is greater than 0.3 mm and less than or equal to 3 mm. By setting the range of the distance b between the first convex surface 2411 and the second end surface 242, the thickness of the weak area can be controlled as much as possible to be more easily broken, while effectively preventing the waterproof layer from being broken due to improper operation during the pressing process. This ensures that the waterproof protection is provided while providing a clear and controlled safety pressure relief channel for abnormal conditions such as high pressure and high temperature. Furthermore, by specifying the range of b, the controllability and consistency of the thickness of the weak area can be maintained during the manufacturing process, which not only ensures quality control in mass production, but also improves the stability of the production process.

[0116] As shown, Figures 9 to 15 In an embodiment, the second end surface 242 is a non-flat surface, and the second end surface 242 has a second convex surface 2421 protruding towards the end surface of the unit cell 21 at the exposed hole 222. The distance a-2 between the second convex surface 2421 and the positive electrode end surface 2111 is greater than or equal to 0.1 mm, or the distance a-1 between the second convex surface 2421 and the cap end surface 21111 is greater than or equal to 0.1 mm. By specifying the range of a-1 and a-2, the thickness of the waterproof layer of the weak area can be controlled as much as possible to be effective in waterproof protection, providing a clear and controlled safety pressure relief channel for abnormal conditions such as high pressure and high temperature. Furthermore, by specifying the range of a-1 and a-2, the controllability and consistency of the thickness of the weak area can be maintained during the manufacturing process, which not only ensures quality control in mass production, but also improves the stability of the production process.

[0117] As shown, Figures 9 to 15 In an embodiment, the second end surface 242 is a non-flat surface, and the second end surface 242 has a second convex surface 2421 protruding towards the end surface of the unit cell 21 at the exposed hole 222. The distance a-2 between the second convex surface 2421 and the positive electrode end surface 2111 is greater than or equal to 0.1 mm and less than 2 mm, or the distance a-1 between the second convex surface 2421 and the cap end surface 21111 is greater than or equal to 0.1 mm and less than 2 mm. By specifying the range of a-1 and a-2, the thickness of the waterproof layer of the weak area can be controlled as much as possible to be effective in waterproof protection, providing a clear and controlled safety pressure relief channel for abnormal conditions such as high pressure and high temperature. Furthermore, by specifying the range of a-1 and a-2, the controllability and consistency of the thickness of the weak area can be maintained during the manufacturing process, which not only ensures quality control in mass production, but also improves the stability of the production process.

[0118] As shown, Figures 9 to 15As shown in the embodiment, the second end face 242 has a second convex surface 2421 protruding towards the end face of the unit cell 21 at the exposed hole 222, the distance a-2 between the second convex surface 2421 and the positive electrode end face 2111 is greater than or equal to 0.5 mm and less than 1 mm, or the distance a-1 between the second convex surface 2421 and the cap end face 21111 is greater than or equal to 0.5 mm and less than 1.5 mm. By defining the range of a-1 and a-2, the thickness of the weak area waterproof layer can be controlled as much as possible under effective waterproof protection, providing a clear and controlled safety pressure relief channel for abnormal conditions such as high pressure and high temperature. In addition, by defining the range of a-1 and a-2, the controllability and consistency of the thickness of the weak area can be maintained during the manufacturing process, which not only ensures quality control in mass production, but also improves the stability of the production process.

[0119] As shown in the embodiment, Figures 9 to 15 As shown in the embodiment, the second end face 242 has a second convex surface 2421 protruding towards the end face of the unit cell 21 at the exposed hole 222, the distance a-2 between the second convex surface 2421 and the positive electrode end face 2111 is greater than or equal to 0.5 mm and less than 1 mm, or the distance a-1 between the second convex surface 2421 and the cap end face 21111 is greater than or equal to 0.5 mm and less than 1.5 mm. By defining the range of a-1 and a-2, the thickness of the weak area waterproof layer can be controlled as much as possible under effective waterproof protection, providing a clear and controlled safety pressure relief channel for abnormal conditions such as high pressure and high temperature. In addition, by defining the range of a-1 and a-2, the controllability and consistency of the thickness of the weak area can be maintained during the manufacturing process, which not only ensures quality control in mass production, but also improves the stability of the production process.

[0120] As shown in the embodiment, Figure 21 As shown in the embodiment, the waterproof member 24 is a non-metallic material with a thermal softening temperature greater than or equal to 90°, and the unit cell 21 of 60V is charged at 30A during discharging, and the temperature of the cell end face rises to about 60°. As the current intensity increases, the temperature of the cell end face also rises. In order to protect the unit cell 21 during charging and discharging, the cell usually has a high pressure and high temperature fire situation in the first cell end face 211 area in abnormal conditions. At this time, the temperature of the cell end face is usually above 100°. By setting the waterproof member 24 to a non-metallic material with a thermal softening temperature greater than or equal to 90°, the waterproof member 24 can soften itself during the abnormal heating of the unit cell 21. At this time, the abnormal unit cell 21 can break through the weak area waterproof member more quickly, thereby providing a safe pressure release mechanism, avoiding affecting the adjacent unit cell 21 or adjacent cell assembly 2 from continuous detonation. At the same time, during the normal heating process of the unit cell 21, it can not be affected by temperature rise, thereby providing stable and effective waterproof effect.

[0121] In an embodiment, the waterproof member 24 is ABS or PC or PP or PE or nylon or PA or GF. By setting the waterproof member 24 as ABS or PC or PP or PE or nylon or PA or GF, the waterproof member 24 can soften by itself in the process of abnormal cell battery 21 temperature rise, and at this time, the abnormal cell battery 21 can break through the weak area of the waterproof member more quickly, thereby providing a safe pressure release mechanism, avoiding affecting the adjacent cell battery 21 or the adjacent battery assembly 2 from continuous explosion.

[0122] In an embodiment, the waterproof member 24 is a waterproof plate with the same thickness, and the thickness is greater than or equal to 0.3 mm and less than or equal to 3 mm. The waterproof member 24 has a first convex surface 2411 and a second convex surface 2421 protruding towards the end surface of the cell battery 21 at the exposed hole 222. The first convex surface 2411 and the second convex surface are formed in the weak area of the exposed hole 222. In the case of abnormal over-temperature of the battery, there is usually a high-pressure and high-temperature fire situation in the first battery end surface 211 area. At this time, the abnormal cell battery 21 can quickly break through the weak area of the waterproof plate, thereby providing a safe pressure release mechanism, avoiding affecting the adjacent cell battery 21 or the adjacent battery assembly 2 from continuous explosion.

[0123] In an embodiment, the waterproof member 24 is a waterproof plate with uneven thickness. The thickness of the waterproof member 24 at the exposed hole 222 is less than the thickness of the waterproof member 24 outside the exposed hole 222. The waterproof member 24 is formed in the weak area of the exposed hole 222. In the case of abnormal over-temperature of the battery, there is usually a high-pressure and high-temperature fire situation in the first battery end surface 211 area. At this time, the abnormal cell battery 21 can quickly break through the weak area of the waterproof plate, thereby providing a safe pressure release mechanism, avoiding affecting the adjacent cell battery 21 or the adjacent battery assembly 2 from continuous explosion.

[0124] As shown in Figure 6 In an embodiment, the waterproof member 24 has a positioning member 226, which is a positioning hole. The positioning column is provided on the battery holder 22, and the size of the positioning column is 1 mm-10 mm, which can achieve effective positioning.

[0125] In an embodiment, the waterproof member 24 has a positioning member 226, which is a positioning column. The size of the positioning column is 0.5 mm-2 mm, and the positioning hole is provided on the battery holder 22, which can accommodate part or all of the positioning.

[0126] In an embodiment, the waterproof part 24 is in a limited fit with the battery cell holder 22, and the embodiment includes but is not limited to a connection in the form of a mortise and tenon joint, welding, bonding, and other process connection forms.

[0127] As shown in Figures 17 to 20 The connecting part 42 has a single-cell detection part 421 and a connecting tab 422. The single-cell detection part 421 has a first connecting end 4211 and a second connecting end 4212. The first connecting end 4211 is connected to the connecting tab 422, which is connected to the unit cell 21 from the exposed hole 222. The second connecting end 4212 is connected to the control board 41 through a welding process to avoid the messy power lines through the terminal connection to the control board, which causes poor waterproof performance of the terminal and inconvenient maintenance in the battery pack.

[0128] In an embodiment, the second connecting end 4212 has at least a first pad 42121 corresponding to the number of unit cells 21, and the control board 41 has at least a second pad 411 corresponding to the number of first pads 42121 of the second connecting end 4212. The area of the first pad 42121 is less than or equal to the second pad 411. By making the area of the first pad 42121 less than or equal to the second pad 411, the smaller area of the first pad 42121 allows it to be completely attached to the larger second pad 411, reducing the risk of short circuit between adjacent pads, thereby improving the safety and reliability of the circuit, providing good thermal conductivity and electrical connection. At the same time, the smaller pad acts on the larger pad in thermal expansion, which can reduce the mechanical stress caused by thermal expansion and contraction, thereby reducing the fatigue and potential cracking of the welding points. This configuration can increase the mechanical strength of the welding and improve the stability and durability of the connection.

[0129] In an embodiment, the second connecting end 4212 has at least a first pad 42121 corresponding to the number of unit cells 21, and the control board 41 has at least a second pad 411 corresponding to the number of first pads 42121 of the second connecting end 4212. The first pad 42121 has at least one through hole 42122 passing through the first pad 42121. The aperture ratio of the through hole 42122 to the pad width of the first pad 42121 where the aperture is located is less than or equal to 1:2. By setting the aperture ratio of the through hole 42122 to the pad width of the first pad 42121 where the aperture is located to be less than or equal to 1:2, the penetration ability of the solder during welding is enhanced, the mechanical strength and the firmness of the conductive connection are improved, and the through hole allows the solder to be better filled, forming a more solid and better conductive connection.

[0130] In an embodiment, the second connecting end 4212 has at least a number of first pads 42121 corresponding to the number of unit cells 21, and the control board 41 has at least a number of second pads 411 corresponding to the number of first pads 42121 of the second connecting end 4212, and the minimum distance e between adjacent pads in the first pads 42121 and / or the second pads 411 is greater than or equal to 0.2 mm and less than or equal to 2 mm. By setting the minimum distance e between adjacent pads to be greater than or equal to 0.2 mm and less than or equal to 2 mm, the risk of short circuit caused by solder bridging or conductive particle contamination can be effectively reduced, and the welding defects caused by manufacturing process deviation can also be reduced. In the manufacturing and operation process, the increased distance provides greater error tolerance for welding and subsequent operations, enhances the safety and reliability of the overall circuit, prevents crosstalk problems between signals, improves signal integrity and transmission efficiency, each pad area can effectively dissipate heat, avoiding local overheating problems caused by excessive concentration, and the increased pad distance allows better heat diffusion and management.

[0131] In an embodiment, the second connecting end 4212 has at least a number of first pads 42121 corresponding to the number of unit cells 21, and the control board 41 has at least a number of second pads 411 corresponding to the number of first pads 42121 of the second connecting end 4212, and the distance f between the peripheral components and the adjacent first pad 42121 welding area and / or the second pad 411 is greater than or equal to 1 mm and less than or equal to 25 mm. By setting f to be greater than or equal to 1 mm and less than or equal to 25 mm, the distance between the pads and the peripheral components can be increased, which helps to reduce the mutual influence of electromagnetic interference. This physical isolation can reduce signal coupling on the circuit board, improve signal integrity, ensure more stable electrical performance, and at the same time, the larger distance between components and pads reduces the risk of short circuit caused by accidental contact or material bridging (such as solder overflow), providing greater safety margin for production and subsequent equipment operation. Furthermore, the increased distance improves the heat dissipation capacity of the circuit board, allowing heat to be more effectively conducted away from high-heat areas, preventing local overheating and heat accumulation problems.

[0132] In an embodiment, the first pad 42121 and / or the second pad 411 has a tin plating thickness of 0.05-0.15 mm. By controlling the tin plating thickness to be 0.05-0.15 mm, the excessive flow of solder during welding can be reduced, and the risk of forming a solder bridge and short circuit can be reduced, thereby improving the electrical isolation effect of the welding area.

[0133] The utility model has the following beneficial effects: through the design of the inlet 33321, waterproof filling parts can be ensured to enter and fill the second waterproof space 3332 smoothly, and then communicate with the first waterproof space 3331, forming a complete waterproof layer. The waterproof filling parts can fill inside these spaces, thereby forming a tight waterproof barrier, isolating the erosion of moisture on the electrical connector, effectively preventing short circuit and electrical failure. And after the output pole piece seat 3 is assembled, the waterproof filling part is injected once through the inlet 33321, and the material fills the two communicating first waterproof space 3331 and second waterproof space 3332 naturally under the driving of gravity or pressure, reducing manual intervention, especially suitable for automatic production line application, while the double space forms a continuous sealing layer, avoiding the leakage risk caused by local unfilled, if the filling material shrinks or cracks after solidification, it can be repaired by entering the inlet again, without disassembling the parts, compared with the method of waterproof treatment for each part respectively, the waterproof filling accuracy and effectiveness can be improved, and the operation steps are simple. In addition, the mutual connection of the main part 335 and the fixed end 332 forms a stable support structure, ensuring the firm fixation of the terminal assembly 32 inside the battery pack, avoiding the connection loosening caused by vibration or impact, and improving the stability of the electrical connection. The application solves the poor waterproof performance of the connection between the terminal assembly in the battery pack and the control device in the prior art.

[0134] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure mark in the claims should not be regarded as limiting the involved claims.

[0135] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. An output tab seat, characterized by, include: The terminal fixing base (33) includes a main body (335) and a fixing end (332) connected to each other. The main body (335) is provided with a mounting groove (334), and the fixing end (332) is used to connect with the component to be fixed. Terminal assembly (32) is disposed within the mounting slot (334); At least a portion of the terminal fixing base (33) is spaced apart from the component to be fixed to form a clearance groove, which is in communication with the mounting groove (334); the inner wall (3341) of the mounting groove (334) is clearance-fitted with the terminal assembly (32) to form a first waterproof space (3331) between the inner wall (3341) and the terminal assembly (32); the inner cavity of the clearance groove forms a second waterproof space (3332); the second waterproof space (3332) is in communication with the first waterproof space (3331); both the first waterproof space (3331) and the second waterproof space (3332) are used to fill waterproof filling parts; The fixed end (332) is provided with an inlet (33321), which is connected to the second waterproof space (3332) so that the waterproof filling part enters the second waterproof space (3332) and the first waterproof space (3331) through the inlet (33321).

2. The output tab seat of claim 1, wherein, The waterproof filling part is disposed in the first waterproof space (3331) and the second waterproof space (3332) by a vacuum coating process; wherein: The minimum distance between at least a portion of the terminal holder (33) and the component to be fixed is greater than or equal to 0.5 mm; and / or, Along the direction from the main body (335) to the fixed end (332), the height of the inlet (33321) is greater than or equal to 0.5 mm.

3. The output tab seat of claim 1, wherein, The waterproof filling part is disposed in the first waterproof space (3331) and the second waterproof space (3332) by low-pressure injection molding process; wherein: The minimum distance between at least a portion of the terminal holder (33) and the component to be fixed is greater than or equal to 0.8 mm; and / or, Along the direction from the main body (335) to the fixed end (332), the height of the inlet (33321) is greater than or equal to 0.8 mm.

4. The output tab seat of claim 1, wherein The waterproof filling part is installed in the first waterproof space (3331) and the second waterproof space (3332) by a glue-filling process; wherein: The minimum distance between at least a portion of the terminal holder (33) and the component to be fixed is greater than or equal to 0.5 mm; and / or, Along the direction from the main body (335) to the fixed end (332), the height of the inlet (33321) is greater than or equal to 0.5 mm.

5. The output tab seat of claim 1, wherein The fixed end (332) is a columnar structure; along the direction from the main body (335) to the fixed end (332), the height of the columnar structure is greater than or equal to 0.5 mm and less than or equal to 3 mm.

6. The output tab seat of claim 1, wherein The fixed end (332) is a protruding structure, which protrudes from the side of the fixed end (332) away from the main body (335); the protruding structure is at least two, and two of the at least two protruding structures are arranged at intervals to form the entrance (33321) between the two protruding structures with an interval space.

7. The output tab seat of any one of claims 1 to 6, wherein, The terminal fixing seat (33) is further provided with a guide slot (331) for guiding the insertion of the tool pole piece, the guide slot (331) is located on one side of the terminal assembly (32) and communicates with the mounting slot (334).

8. The output tab seat of claim 7, wherein, The number of the guide slot (331) and the mounting slot (334) is corresponding; the terminal fixing seat (33) is provided with a plurality of limiting members (336), and the plurality of limiting members (336) are arranged at intervals along a predetermined direction, and the guide slot (331) is formed between adjacent two limiting members (336).

9. A battery pack, characterized by, Comprising: The output pole piece seat of any one of claims 1 to 8.

10. The battery pack of claim 9, wherein, The battery pack further comprises: A housing assembly (1) having a receiving cavity, the output pole piece seat is arranged in the receiving cavity; the housing assembly (1) is provided with an opening (13), the opening (13) is used for mounting the output pole piece seat; and / or, A control device (4), a control board (41) of the control device (4) forms the to-be-fixed component; the control board (41) has at least a control module and a communication module, and the terminal assembly (32) is connected with the control board (41).

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