Pole structure, battery cover plate, battery, battery assembly and electric device

Abstract

The application discloses a pole structure, a battery cover plate, a battery, a battery assembly and a power utilization equipment, relates to the technical field of batteries, and aims to solve the problems of complex structure and process of the battery cover plate. The pole structure comprises an insulating piece and a pole. The insulating piece is used for penetrating and connecting the end cover of the battery. At least part of the pole is arranged in the insulating piece, and the pole has opposite first and second connecting portions. The first connecting portion is used for connecting the internal battery cell of the battery, and the second connecting portion is used for connecting the external circuit outside the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a terminal structure, a battery cover, a battery, a battery assembly, and an electrical device. Background Technology

[0002] In the battery structure, the battery cover is a key component to ensure the safe operation and stable performance of the battery. Its main functions are to seal the battery casing, fix the terminals, and enable the electrodes to be brought out.

[0003] In the prior art, battery covers are usually assembled with terminals by riveting, welding or connecting terminals to external bolts, so as to facilitate electrode lead-out.

[0004] However, these connection methods lead to a more complex structure or manufacturing process for the battery cover, resulting in higher battery costs. Summary of the Invention

[0005] The purpose of this application is to provide a terminal post structure, a battery cover, a battery, a battery assembly, and an electrical device, aiming to solve the problem of complex battery cover structure and manufacturing process.

[0006] In a first aspect, this application provides a terminal structure, which includes an insulating member and a terminal, the insulating member being used to pass through and connect to the end cap of a battery; at least a portion of the terminal is disposed within the insulating member, and the terminal has a first connecting portion and a second connecting portion opposite to each other, the first connecting portion being used to connect to an internal battery cell, and the second connecting portion being used to connect to an external circuit outside the battery.

[0007] In this way, the first and second connecting parts of the terminal post can achieve electrical conduction between the cell structure and the external circuitry outside the battery, thereby enabling the battery to charge and discharge. The insulating component is located inside the end cap, and the terminal post is located inside the insulating component, which facilitates easier isolation between the terminal post and the end cap, reduces the need for external bolts and other structural components, simplifies the structure and installation process of the battery cover, and thus reduces the production and installation costs of the battery cover.

[0008] Optionally, the insulation is formed on the pole.

[0009] Optionally, the outer peripheral surface of the insulating component is provided with external threads for connecting the end cap.

[0010] Optionally, the insulating element includes a sealing portion that passes through the end cap and has external threads on its outer peripheral surface.

[0011] Optionally, the insulating component also includes a positioning part, which is connected to one end of the sealing part along the arrangement direction from the first connecting part to the second connecting part, and the radial dimension of the positioning part is greater than the radial dimension of the sealing part.

[0012] Optionally, the melting point of the insulating component is greater than or equal to 150°C and less than or equal to 300°C.

[0013] Optionally, the pole includes a first conductive segment, a second conductive segment, and a third conductive segment, with a first connecting portion located on the first conductive segment, a second connecting portion located on the second conductive segment, and the third conductive segment connected between the first and second conductive segments; the radial dimensions of the first and second conductive segments are larger than the radial dimension of the third conductive segment.

[0014] Optionally, the pole includes a fourth conductive segment, a fifth conductive segment, and a sixth conductive segment. The fourth and fifth conductive segments are spaced apart and both penetrate through the insulating member. The sixth conductive segment is located between and connects the fourth and fifth conductive segments. A first connecting portion is located on the sixth conductive segment, and a second connecting portion is located on the fourth and fifth conductive segments.

[0015] Optionally, along the arrangement direction from the first connecting portion to the second connecting portion, the size of the fourth conductive segment is larger than the size of the insulating member, and the size of the fifth conductive segment is larger than the size of the insulating member; a connecting hole is provided at the end of the fourth conductive segment and / or the fifth conductive segment away from the sixth conductive segment.

[0016] Optionally, the maximum thickness of the fourth conductive segment is greater than or equal to 0.2 mm and less than or equal to 2 mm, and / or the maximum thickness of the fifth conductive segment is greater than or equal to 0.2 mm and less than or equal to 2 mm, and / or the maximum thickness of the sixth conductive segment is greater than or equal to 0.2 mm and less than or equal to 2 mm.

[0017] Optionally, a recess is provided on the surface of the pole facing the insulator, and at least a portion of the insulator is disposed in the recess and connected to the surface of the recess.

[0018] Secondly, this application also provides a battery cover, which includes the terminal post structure provided in any of the above embodiments.

[0019] Optionally, the battery cover may also include an end cap, which has a through mounting hole, through which the terminal post structure passes and is fixedly connected to the end cap.

[0020] Optionally, the edge of the mounting hole extends toward one side of the end cap to form a flange, which is fixedly connected to the insulating component.

[0021] Optionally, there is a threaded connection between the insulation and the flange.

[0022] Optionally, sealant is applied between the insulation and the flange.

[0023] Optionally, the diameter of the mounting hole is greater than or equal to 6 mm and less than or equal to 40 mm.

[0024] Optionally, along the axial direction of the mounting hole, the height of the flange is greater than or equal to 2 mm and less than or equal to 10 mm.

[0025] Optionally, the battery cover also includes a sealing ring, which is fitted onto the portion of the terminal post structure and positioned between the terminal post structure and the end cap along the axial direction of the mounting hole.

[0026] Thirdly, this application also provides a battery, which includes the terminal structure and / or battery cover provided in any of the above embodiments.

[0027] Fourthly, this application also provides a battery assembly, which includes the battery provided in any of the above embodiments, and a circuit structure, wherein the battery and the circuit structure are electrically connected.

[0028] Fifthly, this application also provides an electrical device, which includes the pole structure and / or battery cover and / or battery and / or battery assembly provided in any of the above embodiments.

[0029] It should be noted that the technical effects brought about by the implementation methods of the second to fifth aspects can all be referred to the technical effects brought about by the corresponding implementation methods in the first aspect, and will not be repeated here. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of 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.

[0031] Figure 1 A partial schematic diagram of a first type of battery provided in an embodiment of this application;

[0032] Figure 2 An exploded view of the first type of battery cover provided in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the first pole post structure provided in the embodiments of this application;

[0034] Figure 4 A partial schematic diagram of a second type of battery provided in an embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the second pole post structure provided in the embodiments of this application;

[0036] Figure 6 This is a schematic diagram of the structure of the second type of battery cover provided in the embodiments of this application.

[0037] Figure reference numerals: 100, battery; 10, battery cover; 20, cell structure;

[0038] 1. Pole post structure; 11. Insulating component; 111. Sealing part; 112. Positioning part;

[0039] 12. Pole post; 12a. First connecting part; 12b. Second connecting part; 121. First conductive segment; 122. Second conductive segment; 123. Third conductive segment; 124. Fourth conductive segment; 125. Fifth conductive segment; 126. Sixth conductive segment; 127. Connecting hole;

[0040] 2. End cap; 21. Mounting hole; 22. Flanged edge;

[0041] 3. Sealing ring. Detailed Implementation

[0042] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0043] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0044] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0045] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, said acceptable deviation range being determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0046] This application provides an electrical device, which may include mobile phones, computers, cameras, vehicles, ships, or industrial equipment, etc., and this application does not limit it.

[0047] The electrical device may include a battery assembly, which includes a battery and a circuit structure. The battery and the circuit structure are electrically connected. The battery is used to provide electrical energy to the electrical device so that the electrical device can work and operate normally. The circuit structure is used to connect the battery to other working parts in the electrical device.

[0048] Please refer to Figure 1 , Figure 1 This is a partial schematic diagram of a first type of battery 100 provided in an embodiment of this application. The battery 100 typically includes a cell structure 20 and a casing, the casing being used to house and protect the cell structure 20. The battery 100 may also include a battery cover 10, which can fit tightly with the casing of the battery 100 to form a sealed space, isolating the cell from external dust, moisture, and impurities, thereby ensuring the good performance and safety of the battery 100.

[0049] Please refer to Figure 1 and Figure 2 , Figure 2 This is an exploded view of the first type of battery cover 10 provided in the embodiments of this application. In order to connect the cell structure 20 to the external circuit outside the battery 100 for charging and discharging the battery 100, the battery cover 10 typically includes an end cover 2 and a terminal structure 1. The end cover 2 is used to connect to the outer shell of the battery 100, and the terminal structure 1 can be inserted through the end cover 2 of the battery 100 to realize electrical conduction between the cell and the outside of the battery 100.

[0050] In some embodiments, the end cap 2 may be provided with a through mounting hole 21 so that the pole post structure 1 can pass through the mounting hole 21 and be fixedly connected to the end cap 2.

[0051] One end of the terminal structure 1 can be located on the side of the end cover 2 facing the cell structure 20, so as to connect with the cell inside the battery 100. The other end of the terminal structure 1 can be located on the side of the end cover 2 away from the cell structure 20, that is, the other end of the terminal structure 1 is located outside the battery 100, for connection with an external circuit. In this way, electrical conduction between the cell structure 20 and the external circuit can be realized, thereby enabling the battery 100 to be charged and discharged.

[0052] Typically, the end cap 2 and the terminal post 12 of the battery cover plate 10 are both made of metal conductive parts. Therefore, the terminal post structure 1 usually includes the terminal post 12 and the insulating part 11 for isolating the end cap 2 and the terminal post 12 to prevent direct conduction between the end cap 2 and the terminal post 12, and ensure that the current is transmitted only through the preset circuit, thereby ensuring the normal charging and discharging function of the battery 100 and reducing the risk of short circuit and leakage.

[0053] In the prior art, the end cap 2 and the terminal post 12 are connected to the insulating component 11 by riveting, or by external bolts connecting the insulating component 11 to the terminal post 12 and the end cap 2. This results in a more complex structure or process for the battery cover 10, and the terminal post 12 or the end cap 2 is easily damaged during installation, increasing the production cost of the battery cover 10.

[0054] Therefore, please refer to Figures 1-3 , Figure 3 This is a schematic diagram of the structure of the first type of pole post structure 1 provided in the embodiments of this application. In the embodiments provided in this application, the pole post structure 1 may include an insulating member 11 and a pole post 12. The insulating member 11 is inserted and connected to the end cap 2. At least a portion of the pole post 12 is disposed in the insulating member 11. The pole post 12 has a first connecting portion 12a and a second connecting portion 12b. The first connecting portion 12a is used to connect to the internal cell of the battery 100, and the second connecting portion 12b is used to connect to the external circuit of the battery 100.

[0055] In this way, the insulating component 11 is located inside the end cover 2, and the terminal post 12 is located inside the insulating component 11. This makes it easier to isolate the terminal post 12 and the end cover 2, reducing the number of external bolts and other structural components, simplifying the structure and installation process of the battery cover 10, and thus reducing the production and installation costs of the battery cover 10.

[0056] The first connecting part 12a and the second connecting part 12b of the terminal post 12 can realize the electrical conduction between the cell structure 20 and the external circuit outside the battery 100, thereby realizing the charging and discharging of the battery 100.

[0057] In some embodiments, the insulating element 11 is formed on the terminal post 12. For example, the insulating element 11 is made of a non-metallic material, and the insulating element 11 is integrally injection molded or hot-pressed onto the terminal post 12 so that the insulating element 11 can be tightly connected to the terminal post 12, thereby enabling the terminal post structure 1 to be connected to the end cap 2 of the battery 100, and achieving insulation and sealing between the terminal post 12 and the end cap 2.

[0058] In this way, the insulating component 11 and the pole post 12 form a structural component during the production process, which facilitates subsequent installation, simplifies parts management steps, and saves production time and production costs.

[0059] In other embodiments, the insulating element 11 can also be configured as a separate structure from the pole post 12, and the insulating element 11 can be installed and connected to the pole post 12, and further installed with the end cap 2.

[0060] In some embodiments, the outer peripheral surface of the insulating member 11 is provided with an external thread for connection with the end cap 2.

[0061] In this way, the insulating component 11 and the end cap 2 can be directly connected by threads, thereby achieving insulation and sealing between the end cap 2 and the terminal post 12 without the need for other structural components for fixation. The installation and operation are simple, and the structure is simple, which helps to simplify the structure of the battery cover 10 and save production costs.

[0062] Furthermore, in order to prevent loosening or poor sealing between the threads of the insulating element 11 and the end cap 2, in some embodiments, a sealant is provided between the insulating element 11 and the end cap 2.

[0063] For example, the sealant is set as a thread-locking adhesive. The thread-locking adhesive is pre-applied to the external thread. After the insulating part 11 and the end cap 2 are connected, the thread-locking adhesive is cured, thereby achieving the effect of preventing loosening and sealing between the threads.

[0064] In some embodiments, the insulating member 11 may include a sealing portion 111, which passes through the mounting hole 21 of the end cap 2 and has an external thread on its outer peripheral surface.

[0065] In this way, the sealing part 111 can achieve insulation and sealing between the end cap 2 and the terminal post 12, preventing gaps between the end cap 2 and the terminal post 12 from causing leakage or dust in the battery 100, which would affect the performance of the battery 100.

[0066] In order to achieve a seal between the insulating part 11 and the end cap 2, the radial dimension of the sealing part 111 matches the radial dimension of the mounting hole 21 so that the sealing part 111 can be threadedly connected to the mounting hole 21.

[0067] In some embodiments, the insulating member 11 may further include a positioning portion 112, which is connected to one end of the sealing portion 111 along the arrangement direction from the first connecting portion 12a to the second connecting portion 12b, and the radial dimension of the positioning portion 112 is greater than the radial dimension of the sealing portion 111.

[0068] The radial dimension of the positioning part 112 is greater than the radial dimension of the sealing part 111. Therefore, when the sealing part 111 passes through the mounting hole 21 and connects with the end cover 2, the positioning part 112 is located on one side of the end cover 2 and is used to limit the pole post structure 1 to prevent the pole post structure 1 from coming out of the mounting hole 21.

[0069] This ensures the accuracy and reliability of the connection between the pole structure 1 and the end cap 2, thereby improving the insulation effect of the insulating component 11.

[0070] In addition, the radial dimension of the positioning part 112 is greater than the radial dimension of the sealing part 111, that is, the radial dimension of the positioning part 112 is greater than the radial dimension of the mounting hole 21. In this way, the positioning part 112 can play the role of sealing the edge, sealing the connection end of the sealing part 111 and the mounting hole 21, and further improving the sealing effect of the insulating part 11.

[0071] Please continue to refer to Figure 1 and Figure 2 In some embodiments of this application, the battery cover 10 may further include a sealing ring 3, which is sleeved on the sealing part 111 and along the axial direction of the mounting hole 21. The sealing ring 3 is disposed between the positioning part 112 and the end cover 2. By screwing the sealing part 111 and the end cover 2 together, the sealing ring 3 can be pressed between the positioning part 112 and the end cover 2. The sealing ring 3 can further improve the sealing effect between the insulating part 11 and the end cover 2.

[0072] The insulating component 11 of this application is formed by injection molding or hot pressing, and the insulating component 11 needs to have good insulation performance. In some embodiments, the material of the insulating component 11 can be set as polytetrafluoroethylene (commonly known as Teflon), so that the insulating component 11 has good anti-corrosion performance and avoids the electrolyte of the battery 100 from corroding the insulating component 11, which would lead to a decrease in sealing and insulation performance.

[0073] In other embodiments, the insulating element 11 may also be made of a polymer material, such as polyetheretherketone (PEEK), polyphenylene sulfide (PPS), polyvinylidene fluoride (PVDF), or polyamide-imide (PAI), etc. The insulating element 11 may also be made of a glass fiber material, such as glass fiber polyetheretherketone or glass fiber polyphenylene sulfide, etc. The insulating element 11 may also be made of polyimide (PEI) suitable for thermoforming, etc. This application does not further limit its application in this regard; the specific choice can be made according to actual needs.

[0074] In some embodiments, the melting point of the insulating element 11 may be set to be greater than or equal to 150°C and less than or equal to 300°C.

[0075] For example, the melting point of the insulating component 11 can be set to 150°C, 175°C, 240°C, 280°C or 300°C, etc. For instance, the insulating component 11 can be polyetheretherketone with a melting point of 160°C to 240°C, polyphenylene sulfide with a melting point of 280°C, or polyvinylidene fluoride with a melting point of 170°C to 180°C, etc.

[0076] Setting the melting point of the insulating component 11 to be greater than or equal to 150°C ensures that the insulating component 11 remains rigid during normal charging and discharging of the battery 100 and during short-term slight temperature rise, thus preventing accidental triggering of pressure relief and ensuring the normal operation of the battery 100.

[0077] Setting the melting point of the insulating component 11 to less than or equal to 300°C ensures that in the early stage of thermal runaway of the battery 100, when the internal temperature of the battery 100 rises to above 150°C due to uncontrolled chemical reaction, the insulating component 11 can soften in time, form a pressure relief channel by utilizing the melting characteristics of the material itself, and act as an explosion-proof valve, responding quickly to temperature changes and blocking the spread of thermal runaway in advance.

[0078] In some embodiments of this application, in order to improve the connection effect between the end cap 2 and the pole post structure 1, the edge of the connection hole 127 of the end cap 2 can extend toward one side of the end cap 2 to form a flange 22, which can be fixedly connected to the insulating member 11.

[0079] In this way, the flange 22 can increase the contact area between the end cap 2 and the insulating component 11, thereby making the connection between the insulating component 11 and the end cap 2 more secure and enhancing the sealing effect of the insulating component 11.

[0080] In some embodiments, the inner surface of the flange 22 may be provided with an internal thread that mates with the external thread of the insulating member 11, thereby achieving a threaded connection between the two.

[0081] This makes the installation of the flange 22 and the insulating component 11 simpler and more convenient, which helps to improve the production efficiency of the battery cover 10. In addition, the flange 22 and the insulating component 11 are connected by threads. Compared with the connection on a smooth surface, the threaded engagement structure can improve the sealing performance and stability of the insulating component 11.

[0082] Furthermore, a sealant can be provided between the flange 22 and the insulating component 11 to further improve the sealing effect and connection strength between the two.

[0083] In some embodiments, the diameter of the mounting hole 21 of the end cap 2 is greater than or equal to 6 mm and less than or equal to 40 mm.

[0084] Setting the diameter of the mounting hole 21 to be greater than or equal to 6mm ensures that the diameter of the insulating component 11 is greater than or equal to 6mm, thus preventing the radial dimension of the terminal post 12 from being too small, which would reduce the current carrying capacity of the battery 100. Setting the diameter of the mounting hole 21 to be less than or equal to 40mm prevents the hole diameter from being too large, which would result in insufficient effective protection and support for the end cover 2, thereby improving the protective effect of the end cover 2. In addition, the edge of the mounting hole 21 is provided with a flange 22. Setting the diameter of the mounting hole 21 between 6mm and 40mm ensures the yield of the flange 22 process and reduces defects such as cracking or curling of the flange 22.

[0085] For example, the diameter of the mounting hole 21 can be set to 6mm, 10mm, 18mm, 25mm, 34mm or 40mm, etc., and can be selected according to actual needs. This application does not make any further limitations in this regard.

[0086] In some embodiments, along the axial direction of the mounting hole 21, the height of the flange 22 is greater than or equal to 2 mm and less than or equal to 10 mm.

[0087] The height of the flange 22 is greater than or equal to 2mm, which ensures the contact area between the flange 22 and the insulating component 11, thereby improving the connection strength and sealing effect between the insulating component 11 and the cover plate. The height of the flange 22 is less than or equal to 10mm, which can ensure the yield of the flange 22 process and reduce the cracking or curling of the flange 22.

[0088] For example, the height of the flange 22 along the axial direction of the mounting hole 21 can be set to 2mm, 5mm, 8mm or 10mm, etc.

[0089] It should be noted that the shape of the mounting hole 21 is not limited to a circle, and can also be set to an ellipse, a square or a trapezoid, etc. For non-circular mounting holes 21, the diameter of the mounting hole 21 can be represented by the diameter of a circle that is equivalent to a circular mounting hole 21 in terms of space occupation and structural strength.

[0090] Please continue to refer to Figures 1-3 In some embodiments, the pole post 12 may include a first conductive segment 121, a second conductive segment 122 and a third conductive segment 123, a first connecting portion 12a located in the first conductive segment 121, a second connecting portion 12b located in the second conductive segment 122, and the third conductive segment 123 connected between the first conductive segment 121 and the second conductive segment 122; the radial dimension of the first conductive segment 121 and the second conductive segment 122 is larger than the radial dimension of the third conductive segment 123.

[0091] For example, the first conductive segment 121, the second conductive segment 122 and the third conductive segment 123 can form an "I" shaped structure.

[0092] Since the first connection portion 12a for connecting to the battery cell and the second connection portion 12b for connecting to the external circuit are respectively provided on the second conductive segment 122 of the first conductive segment 121, and the radial dimensions of the first conductive segment 121 and the second conductive segment 122 are larger than the radial dimension of the third conductive segment 123, the contact area between the first connection portion 12a and the battery cell and the contact area between the second connection portion 12b and the external circuit can be increased, thereby improving the overcurrent capacity of the terminal post 12 and improving the charging and discharging efficiency of the battery 100.

[0093] Meanwhile, the third conductive segment 123 is connected between the first conductive segment 121 and the second conductive segment 122, and the radial dimension of the third conductive segment 123 is smaller. Compared with the first conductive segment 121, the second conductive segment 122 and the third conductive segment 123 having the same radial dimension, the pole post 12 provided in this embodiment can increase the contact area between the pole post 12 and the insulating member 11. That is, the circumferential surface of the third conductive segment 123 and the opposite end faces of the first conductive segment 121 and the second conductive segment 122 can improve the connection strength between the insulating member 11 and the pole post 12.

[0094] In some possible structural designs, the cross-section of the pole post 12 can be circular, while in other possible structural designs, the cross-section of the pole post 12 can also be square, trapezoidal, or triangular, etc.

[0095] Please refer to Figure 4 and Figure 5 , Figure 4 This is a partial schematic diagram of the second type of battery 100 provided in an embodiment of this application. Figure 5 This is a schematic diagram of the second type of pole post structure 1 provided in the embodiments of this application. In some other embodiments, the pole post 12 may include a fourth conductive segment 124 and a sixth conductive segment 126. The fourth conductive segment 124 passes through the insulating member 11, and the sixth conductive segment 126 is connected to the end of the fourth conductive segment 124 facing the cell structure 20. A first connecting part 12a is disposed on the sixth conductive segment 126, and a second connecting part 12b is disposed on the fourth conductive segment 124.

[0096] In this way, the sixth conductive segment 126 can be connected to the cell structure 20, and the fourth conductive segment 124 can be connected to the external circuit, thereby realizing electrical conduction between the cell and the external circuit.

[0097] The terminal 12 may further include a fifth conductive segment 125, with the fourth conductive segment 124 and the fifth conductive segment 125 spaced apart and both penetrating the insulating member 11. A sixth conductive segment 126 is disposed between the fourth conductive segment 124 and the fifth conductive segment 125 and connects the fourth conductive segment 124 and the fifth conductive segment 125. A second connecting portion 12b is disposed between the fourth conductive segment 124 and the fifth conductive segment 125. In this way, the contact area between the external circuit and the terminal 12 can be increased, thereby improving the current carrying efficiency of the terminal 12.

[0098] In some other embodiments, the pole piece 12 may also be provided with a plurality of fourth conductive segments 124 and / or fifth conductive segments 125, all of which penetrate through the insulating member 11 and are connected to the sixth conductive segment 126, thereby further increasing the contact area between the pole piece 12 and the external circuit and increasing the overcurrent velocity.

[0099] Please refer to Figures 4-6 , Figure 6 This is a schematic diagram of the structure of the second type of battery cover 10 provided in the embodiments of this application. In some embodiments, along the arrangement direction from the first connecting portion 12a to the second connecting portion 12b, the size of the fourth conductive segment 124 is larger than the size of the insulating member 11, and the size of the fifth conductive segment 125 is larger than the size of the insulating member 11.

[0100] This allows at least a portion of the fourth conductive segment 124 and the fifth conductive segment 125 to extend out of the insulating member 11, facilitating the connection of external circuits and / or the battery cell to the terminal post 12.

[0101] A connection hole 127 is provided at the end of the fourth conductive segment 124 and / or the fifth conductive segment 125 opposite to the sixth conductive segment 126. The connection hole 127 is used to connect an external circuit. This allows the external circuit to be fixedly connected to the second connection part 12b through the connection hole 127. For example, the terminals of the external circuit can be fixedly connected to the connection hole 127 by bolts. For instance, the terminals of the external circuit also have mating holes, and the bolt passes through the connection hole 127 and the mating hole to fix the external circuit to the pole 12. Alternatively, a bolt structure can be fixedly provided on the external circuit, and the bolt structure can be fixedly connected to the pole 12 by passing through the connection hole 127.

[0102] This facilitates the installation and removal of external circuits and terminals 12, and makes it easier to replace and repair the battery 100.

[0103] In some embodiments, the sixth conductive segment 126 is located on the side of the insulating member 11 facing the cell structure 20, and the sixth conductive segment 126 is welded to the cell structure 20. For example, the cell structure 20 includes a current collector, the end of which is provided with a lead-out piece, and the sixth conductive segment 126 is welded and fixed to the lead-out piece.

[0104] For example, the pole 12 can be configured in a "U" shape.

[0105] In some embodiments, the maximum thickness of the fourth conductive segment 124 is greater than or equal to 0.2 mm and less than or equal to 2 mm, and / or the thickness of the fifth conductive segment 125 is greater than or equal to 0.2 mm and less than or equal to 2 mm, and / or the thickness of the sixth conductive segment 126 is greater than or equal to 0.2 mm and less than or equal to 2 mm.

[0106] It should be noted that when the pole post 12 is a plate-like or sheet-like structure, the maximum thickness refers to the maximum dimension of the plate constituting the pole post 12 along the thickness direction. When the pole post 12 is a cylindrical structure, the maximum thickness refers to the maximum dimension of the pole post 12 along the diameter direction.

[0107] In some embodiments, the pole post 12 can be formed by sheet metal stamping, and the thicknesses of the fourth conductive segment 124, the fifth conductive segment 125, and the sixth conductive segment 126 can be set to the same thickness.

[0108] The thickness is greater than or equal to 0.2 mm, which can ensure the stability of the electrode structure 1 and the overcurrent capacity of the electrode 12, thereby improving the charging and discharging efficiency and safety of the battery 100.

[0109] The thickness is less than or equal to 2mm, which can prevent the pole post 12 from being too thick, thus reducing the connection and sealing strength between the pole post 12 and the insulating component 11.

[0110] In some embodiments, in order to enhance the connection strength and sealing effect between the pole post 12 and the insulator 11, the surface of the pole post 12 facing the insulator 11 is provided with a recess, at least a portion of the insulator 11 is disposed in the recess and connected to the surface of the recess.

[0111] For example, the recessed portion can be configured as a groove or a recessed groove, etc., and this application does not further limit it.

[0112] At least a portion of the insulating member 11 is connected to the surface of the recess, thereby enhancing the adhesion between the pole post 12 and the insulating member 11, and thus improving the connection strength and sealing effect between the pole post 12 and the insulating member 11.

[0113] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0114] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pole post structure, characterized in that, include: An insulating component (11) is used to pass through and connect to the end cap (2) of the battery; A terminal post (12) is disposed at least in the insulating member (11), and the terminal post (12) has a first connecting portion (12a) and a second connecting portion (12b) opposite to each other, the first connecting portion (12a) being used to connect to the internal battery cell, and the second connecting portion (12b) being used to connect to an external circuit outside the battery.

2. The pole post structure according to claim 1, characterized in that, The insulating element (11) is formed on the pole (12).

3. The pole post structure according to claim 1, characterized in that, The outer peripheral surface of the insulating component (11) is provided with external threads, which are used to connect the end cap (2).

4. The pole post structure according to claim 3, characterized in that, The insulating component (11) includes a sealing part (111), which passes through the end cap (2), and the external thread is provided on the outer peripheral surface of the sealing part (111).

5. The pole post structure according to claim 4, characterized in that, The insulating member (11) further includes a positioning part (112), which is connected to one end of the sealing part (111) along the arrangement direction from the first connecting part (12a) to the second connecting part (12b), and the radial dimension of the positioning part (112) is greater than the radial dimension of the sealing part (111).

6. The pole post structure according to claim 1, characterized in that, The melting point of the insulating component (11) is greater than or equal to 150°C and less than or equal to 300°C.

7. The pole post structure according to claim 1, characterized in that, The pole post (12) includes a first conductive segment (121), a second conductive segment (122) and a third conductive segment (123), the first connecting part (12a) is located on the first conductive segment (121), the second connecting part (12b) is disposed on the second conductive segment (122), and the third conductive segment (123) is connected between the first conductive segment (121) and the second conductive segment (122); The radial dimensions of the first conductive segment (121) and the second conductive segment (122) are greater than the radial dimension of the third conductive segment (123).

8. The pole post structure according to claim 1, characterized in that, The pole post (12) includes a fourth conductive segment (124), a fifth conductive segment (125) and a sixth conductive segment (126). The fourth conductive segment (124) and the fifth conductive segment (125) are spaced apart and both the fourth conductive segment (124) and the fifth conductive segment (125) penetrate the insulating member (11). The sixth conductive segment (126) is located between the fourth conductive segment (124) and the fifth conductive segment (125) and connects the fourth conductive segment (124) and the fifth conductive segment (125). The first connecting part (12a) is provided on the sixth conductive segment (126), and the second connecting part (12b) is provided on the fourth conductive segment (124) and the fifth conductive segment (125).

9. The pole post structure according to claim 8, characterized in that, Along the arrangement direction from the first connecting portion (12a) to the second connecting portion (12b), the size of the fourth conductive segment (124) is larger than the size of the insulating member (11), and the size of the fifth conductive segment (125) is larger than the size of the insulating member (11); the fourth conductive segment (124) and / or the fifth conductive segment (125) are provided with connecting holes (127) at the ends opposite to the sixth conductive segment (126).

10. The pole post structure according to claim 9, characterized in that, The maximum thickness of the fourth conductive segment (124) is greater than or equal to 0.2 mm and less than or equal to 2 mm, and / or the maximum thickness of the fifth conductive segment (125) is greater than or equal to 0.2 mm and less than or equal to 2 mm, and / or the maximum thickness of the sixth conductive segment (126) is greater than or equal to 0.2 mm and less than or equal to 2 mm.

11. The pole post structure according to claim 1, characterized in that, The pole post (12) has a recess on its surface facing the insulator (11), and at least a portion of the insulator (11) is disposed in the recess and connected to the surface of the recess.

12. A battery cover, characterized in that, include: The pole post structure (1) according to any one of claims 1-11; and End cap (2), the end cap (2) is provided with a through mounting hole (21), the pole post structure (1) passes through the mounting hole (21) and is fixedly connected to the end cap (2).

13. The battery cover according to claim 12, characterized in that, The edge of the mounting hole (21) extends toward one side of the end cap (2) to form a flange (22), and the flange (22) is fixedly connected to the insulating member (11).

14. The battery cover according to claim 13, characterized in that, The insulating element (11) is threadedly connected to the flange (22).

15. The battery cover according to claim 13, characterized in that, A sealant is provided between the insulating component (11) and the flange (22).

16. The battery cover according to claim 13, characterized in that, The diameter of the mounting hole (21) is greater than or equal to 6 mm and less than or equal to 40 mm.

17. The battery cover according to claim 16, characterized in that, Along the axial direction of the mounting hole (21), the height of the flange (22) is greater than or equal to 2 mm and less than or equal to 10 mm.

18. The battery cover according to claim 12, characterized in that, It also includes a sealing ring (3), which is sleeved on part of the pole post structure (1) and along the axial direction of the mounting hole (21), and the sealing ring (3) is disposed between the pole post structure (1) and the end cap (2).

19. A battery, characterized in that, Includes the pole post structure (1) as described in any one of claims 1-11 and / or the battery cover plate (10) as described in any one of claims 12-18.

20. A battery assembly, characterized in that, include: The battery (100) according to claim 19, and The circuit structure is electrically connected to the battery (100).

21. An electrical appliance, characterized in that, Includes the pole post structure (1) according to any one of claims 1-11 and / or the battery cover (10) according to any one of claims 12-18 and / or the battery (100) according to claim 19 and / or the battery assembly according to claim 20.

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