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

Abstract

The embodiment of the application provides a kind of pole assembly, battery cover plate structure, battery, battery pack and electric equipment, it is related to battery technical field.Pole assembly includes pole, insulating piece, metal structural member and conducting piece.Pole has electric connection part and installation part in its length direction.Both insulating piece and metal structural member are sleeved in the circumference of installation part, and metal structural member is located at the side of insulating piece away from electric connection part.Metal structural member is configured to be connected with battery cover plate.At least part of conducting piece is arranged in insulating piece, and conducting piece connects electric connection part and metal structural member.The pole assembly provided by the embodiment of the application is electrically connected with battery cover plate through conducting piece, so that pole and battery cover plate achieve equipotential, to help shorten the voltage measurement distance between battery positive pole and negative pole, facilitate voltage acquisition for battery with positive pole and negative pole far apart.

Description

Technical Field

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

[0002] Power batteries are the core component of new energy vehicles and also the power source for them.

[0003] Currently, batteries need to use voltage acquisition devices to collect voltage data in order to effectively determine the battery's state of charge and health, thereby ensuring the battery's lifespan and safety.

[0004] However, in related technologies, the positive and negative terminals of the battery are spatially far apart, which makes voltage acquisition inconvenient. Utility Model Content

[0005] This application provides a terminal assembly, a battery cover structure, a battery, a battery pack, and an electrical device to solve the technical problem that the positive and negative terminals of a battery are far apart in spatial layout, making voltage acquisition inconvenient.

[0006] In a first aspect, this application provides a pole assembly, comprising:

[0007] The pole has an electrical connection part and a mounting part in the length direction;

[0008] Both the insulating component and the metal structural component are sleeved around the mounting portion, and the metal structural component is located on the side of the insulating component opposite to the electrical connection portion; the metal structural component is configured to connect with the battery cover plate.

[0009] A conductive element, at least a portion of which is disposed within the insulating element, the conductive element connecting the electrical connection portion and the metal structural element.

[0010] The terminal assembly provided in this application provides an electrical connection between the terminal and the battery cover via a conductive element, ensuring that the terminal and the battery cover are at the same potential. When the terminal in the terminal assembly is the positive terminal, since the positive terminal and the battery cover are at the same potential, the voltage measurement distance between the positive and negative terminals of the battery is shortened when collecting voltage from batteries where the positive and negative terminals are far apart. This effectively reduces the difficulty of voltage acquisition and facilitates timely monitoring of the battery voltage.

[0011] Furthermore, by placing at least a portion of the conductive element within the insulating element, this embodiment reduces the external space occupied by the conductive element, thereby improving the structural compactness of the terminal assembly and the battery. At the same time, since at least a portion of the conductive element is placed within the insulating element, it helps to reduce the contact between the conductive element and other external conductive components or corrosive media, thus helping to ensure the stable conductivity of the conductive element.

[0012] In one possible implementation, the conductive element has a first end and a second end, and the insulating element has a first metal layer on the side facing the electrical connection portion, the first metal layer connecting the electrical connection portion and the first end;

[0013] The insulating member has a second metal layer on the side facing the metal structure member, the second metal layer connecting the metal structure member and the second end.

[0014] In one possible implementation, the shape of the first metal layer matches the shape of the insulating element to connect the electrical connection portion and the two opposing sides of the insulating element.

[0015] In one possible implementation, the shape of the second metal layer matches the shape of the insulating element to connect the metal structural element and the two opposing sides of the insulating element.

[0016] In one possible implementation, the plane on which the first metal layer is disposed of the insulating element is the top surface, and the plane on which the second metal layer is disposed of the insulating element is the bottom surface.

[0017] The first end is disposed on the top surface, and the extension direction of the first end is parallel to the top surface; the second end is disposed on the bottom surface, and the extension direction of the second end is parallel to the bottom surface.

[0018] In one possible implementation, the first end and the second end extend in the same direction.

[0019] In one possible implementation, the insulating member has a first groove on the side facing the electrical connection portion, the shape of the first groove matching the shape of the first end portion, the first end portion being disposed within the first groove.

[0020] In one possible implementation, the insulating member has a second groove on the side facing the metal structural member, the shape of the second groove matching the shape of the second end, the second end being disposed within the second groove.

[0021] In one possible implementation, the conductor further has an intermediate section located between the first end and the second end to connect the first end and the second end;

[0022] The insulating component has a through-hole at the position corresponding to the middle section, the through-hole is connected to the first groove and the second groove, and the middle section is disposed in the through-hole.

[0023] In one possible implementation, the conductive element is a metal structure; and / or, the metal structure is a metal wire.

[0024] In one possible implementation, the conductor can be melted.

[0025] Secondly, this application also provides a battery cover structure, comprising:

[0026] Battery cover, with mounting section;

[0027] The aforementioned terminal assembly has a metal structural component located within the mounting portion and connected to the battery cover.

[0028] The battery cover structure provided in this application shortens the voltage acquisition distance of the battery by setting the terminal post assembly in the battery cover structure, so as to collect battery voltage information through the voltage acquisition device and ensure timely and convenient acquisition of battery voltage information.

[0029] Thirdly, this application also provides a battery, comprising:

[0030] Battery casing;

[0031] The aforementioned battery cover structure is disposed on the battery casing.

[0032] The battery provided in this application has the aforementioned battery cover structure, which shortens the battery voltage measurement distance and facilitates the acquisition of battery voltage by the voltage acquisition device.

[0033] Fourthly, this application also provides a battery pack comprising a plurality of the aforementioned batteries.

[0034] The battery pack provided in this application has the aforementioned battery, which enables the battery pack to easily collect battery voltage information so that the battery pack voltage information can be acquired by a voltage acquisition device, thereby enabling timely detection of abnormal battery pack voltage and improving the safety of the battery pack.

[0035] Fifthly, this application also provides an electrical appliance, comprising:

[0036] The device body, which includes an installation compartment,

[0037] The aforementioned battery pack is located within the mounting compartment.

[0038] The electrical equipment provided in this application has the aforementioned battery pack, thus achieving the same effect as the battery pack and improving the safety of both the battery pack and the electrical equipment. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is an application scenario diagram of the pole post assembly provided in the embodiments of this application;

[0041] Figure 2 for Figure 1 The front view;

[0042] Figure 3 This is a schematic diagram of the structure of the pole assembly provided in the embodiments of this application;

[0043] Figure 4 for Figure 3 An explosion diagram;

[0044] Figure 5 for Figure 3 Cross-sectional view;

[0045] Figure 6 A first-view schematic diagram of the insulating component of the pole assembly provided in an embodiment of this application;

[0046] Figure 7 An unfolded view of the insulating component of the pole assembly provided in the embodiments of this application;

[0047] Figure 8 for Figure 6 A second-view schematic diagram of the insulating component;

[0048] Figure 9 for Figure 6 Top view of the insulating component;

[0049] Figure 10 for Figure 6 Exploded view of the insulating component;

[0050] Figure 11 for Figure 8 Exploded view of the insulating component.

[0051] Figure label:

[0052] 100 - Pole post; 110 - Electrical connection part; 120 - Mounting part;

[0053] 200 - Insulating component; 201 - First groove; 202 - Second groove; 210 - First metal layer; 220 - Second metal layer; 230 - Through opening;

[0054] 300 - Metal structural components;

[0055] 400 - Conductor; 410 - First end; 420 - Second end; 430 - Intermediate section;

[0056] 500-Battery cover. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0058] This application provides an electrical device, which can be a vehicle, such as a sedan, bus, or truck. For example, the vehicle can be an electric vehicle, a pure electric vehicle, a hybrid electric vehicle, a range-extended electric vehicle, a plug-in hybrid electric vehicle, a new energy vehicle, or any vehicle equipped with a battery.

[0059] The following explanation uses a vehicle as an example of an electrical appliance.

[0060] The vehicle may also include a body, a motor, and a battery pack, wherein the electronic control components, battery pack, axles, and motor can all be mounted on the body. The battery pack can be electrically connected to the motor, and the motor can be connected to the axles. The battery pack supplies power to the motor, enabling it to rotate, which in turn drives the axles, thus allowing the vehicle to move. The vehicle may also have other electrical components, and the battery pack can supply power to these other components as well.

[0061] A battery pack can include multiple batteries, which are the core energy storage units of the pack, typically lithium-ion or nickel-metal hydride batteries. Multiple batteries can be connected in series or parallel to form battery modules to meet the vehicle's power requirements. A battery can include a battery casing, a battery cover, and battery cells. The cells are housed inside the battery casing, and the battery cover is placed over the casing to seal and protect the cells. The battery cover and battery casing are usually made of metal.

[0062] Battery covers typically have terminals, which are the channels through which the battery charges and discharges. Electrical isolation between the terminals and the battery casing is achieved through insulating components to prevent direct conductivity between the terminals and the casing. The terminals include a positive terminal and a negative terminal. The positive terminal connects to the positive current collector inside the battery, and the negative terminal connects to the negative current collector inside the battery.

[0063] In voltage acquisition scenarios, battery voltage generally refers to the potential difference between the positive and negative terminals. Therefore, the voltage acquisition device needs to establish electrical connections with the positive and negative terminals respectively through connection terminals, and then transmit the potential difference signal through the acquisition line to measure the battery voltage.

[0064] As mentioned in the background section, in related technologies, the positive and negative terminals of the battery are spatially far apart. When collecting battery voltage, the connection terminals of the voltage acquisition device are limited by the length of the acquisition line, and the acquisition line needs to be lengthened to accommodate the long distance between the positive and negative terminals, which increases the difficulty of collecting voltage and is not conducive to timely monitoring of battery condition.

[0065] Furthermore, when the battery accidentally comes into contact with an external circuit, the battery casing and cover will form a closed circuit. Since the external circuit usually has low resistance, this closed circuit will generate a certain current. If the current is too large, the battery is prone to generating a lot of heat, which may pose a risk of fire or explosion.

[0066] Based on this, embodiments of this application provide a terminal assembly, a battery cover structure, a battery, a battery pack, and an electrical device to solve the aforementioned technical problems. Specifically, the terminal assembly provided in this application includes a terminal, an insulating component, a metal structural component, and a conductive component. The conductive component electrically connects the terminal to the battery cover, enabling the terminal and the battery cover to achieve equipotential.

[0067] When the terminal in the terminal assembly is the positive terminal, the terminal (positive terminal) in the terminal assembly is made to be at the same potential as the battery cover plate by the setting of the terminal assembly provided in this application embodiment, which helps to shorten the voltage measurement distance between the positive and negative terminals of the battery, thereby reducing the difficulty of voltage acquisition for batteries where the positive and negative terminals are far apart.

[0068] Meanwhile, the conductive component, through its fusion mechanism under fusion conditions, can cut off the electrical connection between the terminal and the battery cover, thereby disconnecting the battery casing from the external circuit. This prevents the battery casing from overheating due to excessive current, thus helping to ensure the normal use of the battery.

[0069] It should be noted that when the terminal in the terminal assembly is a positive terminal, the terminal assembly can be understood as a positive terminal assembly.

[0070] The following describes in detail, taking the positive terminal assembly as an example, the terminal assembly, battery cover structure, battery, battery pack, and electrical equipment provided in the embodiments of this application, with reference to the accompanying drawings.

[0071] Firstly, please refer to Figures 1 to 5 This application provides a pole assembly, including a pole 100, an insulating component 200, a metal structural component 300, and a conductive component 400.

[0072] Please see Figure 4 The pole 100 has an electrical connection portion 110 and a mounting portion 120 in its length direction.

[0073] The terminal post 100 is a conductive carrier connecting the internal electrodes of the battery to the external circuit. It is electrically connected to the current collector inside the battery and can conduct the current from inside the battery. The electrical connection portion 110 is used for external conduction and can be the conductive end of the terminal post 100 exposed on the battery cover plate 500. The mounting portion 120 is a section of the terminal post 100 and can be used to mount the insulating component 200 and the metal structural component 300.

[0074] Both the insulating member 200 and the metal structural member 300 are sleeved around the mounting portion 120, with the metal structural member 300 located on the side of the insulating member 200 opposite to the electrical connection portion 110. The metal structural member 300 is configured to connect to the battery cover 500. At least a portion of the conductive member 400 is disposed within the insulating member 200, and the conductive member 400 connects the electrical connection portion 110 and the metal structural member 300.

[0075] The insulating component 200 provides electrical isolation between the terminal 100 and the metal structural component 300 and the battery cover 500, preventing the current from the terminal 100 from being directly conducted to the metal structural component 300 or the casing. The insulating component 200 can be made of a high-temperature resistant insulating material, such as ceramic or modified plastic.

[0076] Please see Figure 2 The metal structural component 300 serves as an intermediate connection between the terminal assembly and the battery cover 500, allowing the terminal assembly to be securely mounted on the battery cover 500. The metal structural component 300 can be installed on the battery cover 500 via snap-fit ​​or fastening to achieve a fixed mounting position.

[0077] The conductive element 400 can stably conduct the voltage of the electrical connection portion 110 of the terminal 100 to the metal structural member 300, so that the metal structural member 300 and the electrical connection portion 110 of the terminal 100 are electrically connected, and the voltage of the terminal 100 is led to the surface of the metal structural member 300. Since the metal structural member 300 is connected to the battery cover 500, and the battery cover 500 is a metal cover, the voltage of the terminal 100 can be further led to the surface of the battery cover 500, which is equivalent to extending the conductive contact of the terminal 100 from the electrical connection portion 110 to the battery cover 500 connected to the metal structural member 300. In this way, the terminal 100 and the battery cover 500 achieve equal voltage. In addition, since the battery cover 500 is connected to the battery casing, the voltage of the battery cover 500 can be transmitted to the battery casing, thereby making the terminal 100 and the battery casing equal voltage as well.

[0078] The terminal assembly can have one or at least two terminals 100. When there are two terminals 100 in the terminal assembly, the terminal assembly can have a conductor 400 installed on only one of the terminals 100, so that the terminal 100 and the battery cover 500 can be equidistantly associated. In this way, by measuring the voltage between the other terminal 100 and the nearby battery cover 500, the voltage between the two terminals 100 can be measured, thereby acquiring the battery voltage.

[0079] Furthermore, since the conductive element 400 is at least partially disposed within the insulating element 200, the space occupied by the conductive element 400 outside the insulation is reduced, thereby shrinking the radial or axial dimensions of the terminal assembly and making it more suitable for the compact layout of the battery. Simultaneously, the insulating element 200 can enclose a portion of the conductive element 400 within it, physically isolating this portion of the conductive element 400 from non-target conductive components, reducing accidental contact between the conductive element 400 and non-target conductive components, and reducing contact between the conductive element 400 and corrosive media external to the battery, thereby ensuring the conductive stability of the conductive element 400.

[0080] Therefore, in this embodiment, the terminal assembly electrically connects the terminal 100 to the battery cover 500 via the conductive element 400, enabling the terminal 100 and the battery cover 500 to achieve equipotentiality. When the terminal 100 in the terminal assembly is the positive terminal, since the positive terminal and the battery cover 500 are at equipotential, the voltage measurement distance between the positive and negative terminals of the battery is shortened when collecting voltage from batteries where the positive and negative terminals are far apart, effectively reducing the difficulty of voltage acquisition. Furthermore, by placing at least a portion of the conductive element 400 within the insulating element 200, this embodiment reduces the external space occupied by the conductive element 400, which helps improve the structural compactness of the battery. Simultaneously, it reduces the contact between the conductive element 400 and other external conductive components or corrosive media, helping to ensure the stable conductivity of the conductive element 400.

[0081] When the terminal assembly is used in the battery, due to the setting of the conductive element 400 in the insulating component 200, the terminal 100 in the terminal assembly and the battery cover plate 500 are kept at the same potential. When it is necessary to collect the battery voltage, one connection terminal of the voltage acquisition device is connected to the negative terminal of the battery, and the other terminal is connected to the battery cover plate 500 or the battery casing. At this time, the potential difference between the two connection terminals is the positive and negative voltage of the battery. It is not necessary to cross to the electrical connection part 110 of the positive terminal to facilitate battery voltage acquisition and effectively improve the voltage acquisition efficiency.

[0082] In some alternative embodiments, the conductor 400 may be a metal structure.

[0083] The conductive element 400 can be made of a metal material with low resistivity, such as copper, aluminum, nickel or their alloys. The conductive element 400 made of the above materials can efficiently conduct current, reduce voltage loss, and ensure equipotential between the terminal 100 and the metal structure 300.

[0084] Compared to non-metallic conductive materials, conductive components made of metallic materials have more stable conductivity. During battery charging and discharging temperature fluctuations and long-term use, their resistivity changes less, which can reduce signal distortion or connection failure caused by conductivity degradation.

[0085] In some embodiments, the metal structure may be a metal wire.

[0086] The metal wire has a slender cylindrical or flat cross-section, and the metal wire has a low space occupancy rate, avoiding the increase in the size of the insulating component 200 due to the excessive volume of the conductive component 400.

[0087] Meanwhile, the metal wire has good flexibility and low requirements for the straightness of the internal channel of the insulating component 200. It can adapt to the bending and turning of the internal channel of the insulating component 200, which helps to match the non-linear conductive path between the electrical connection part 110 of the pole post 100 and the metal structure 300.

[0088] In some alternative embodiments, please refer to Figures 6 to 11 The conductive member 400 has a first end 410 and a second end 420, and the insulating member 200 has a first metal layer 210 on the side facing the electrical connection portion 110, the first metal layer 210 connecting the electrical connection portion 110 and the first end 410.

[0089] The insulating member 200 has a second metal layer 220 on the side facing the metal structure member 300, the second metal layer 220 connecting the metal structure member 300 and the second end 420.

[0090] The first end 410 of the conductive member 400 is connected to the electrical connection portion 110 of the terminal post 100, and the second end 420 is connected to the metal structural member 300, so that the electrical connection portion 110 of the terminal post 100 and the metal structural member 300 are electrically connected, thereby making the terminal post 100 and the battery cover plate 500 at the same potential.

[0091] This embodiment increases the conductive contact area between the first end 410 and the pole 100, and the conductive contact area between the electrical connection portion 110 and the first end 410, by providing a first metal layer 210 and a second metal layer 220 on both sides of the insulating member 200. This helps to enhance the connection stability between the first metal layer 210 and the electrical connection portion 110, as well as the connection stability between the electrical connection portion 110 and the insulating member 200. The first metal layer 210 can connect the electrical connection portion 110 and the first end 410 by welding or bonding, allowing the voltage of the pole 100 to be conducted to the conductive member 400. Similarly, the second metal layer 220 can connect the metal structural member 300 and the second end 420 by welding or bonding, allowing the voltage of the conductive member 400 to be transmitted to the metal structural member 300.

[0092] It should be noted that the first metal layer 210 can have both conductive and fixing functions, allowing the first end 410 to connect to the electrical connection portion 110 through the first metal layer 210, while also fixing the first end 410 to the insulating member 200 through the first metal layer 210, thereby helping to improve the installation stability of the conductive member 400. In addition, the first end 410 can also be directly connected to the electrical connection portion 110, allowing the conductive member 400 to directly contact the terminal post 100 to achieve conductivity.

[0093] Therefore, in this embodiment, a first metal layer 210 and a second metal layer 220 are provided on both sides of the insulating member 200 to enhance the connection stability between the first metal layer 210 and the electrical connection portion 110 and between the electrical connection portion 110 and the insulating member 200, which helps to reduce contact resistance fluctuations and makes the voltage signal transmitted to the battery cover plate 500 more stable.

[0094] In some embodiments, the first metal layer 210 and the second metal layer 220 are both nickel layers, and the first metal layer 210 and the electrical connection portion 110, and the second metal layer 220 and the metal structural component 300 are all connected by brazing.

[0095] Nickel has low resistivity and high melting point, which can meet the requirements for efficient voltage conduction between the electrode 100 and the metal structural component 300.

[0096] Brazing is a welding method in which a low-melting-point filler metal is melted at high temperature and applied to the joint interface, forming a strong joint after cooling. The filler metal can be silver-based or copper-based brazing filler metal.

[0097] During the brazing process, a metallurgical bond is formed between the filler metal and the first metal layer 210 and the electrical connection part 110. The connection interface has a high connection strength, which makes the pole post 100, the insulator 200, the conductor 400 and the metal structural part 300 have high connection stability to resist stress under conditions such as battery vibration and impact.

[0098] In some alternative embodiments, please refer to Figure 6 and Figure 7 The shape of the first metal layer 210 matches the shape of the insulating member 200 to connect the electrical connection portion 110 and the two opposing sides of the insulating member 200. That is, the outline and extension path of the first metal layer 210 are consistent with the surface morphology of the insulating member 200 facing the electrical connection portion 110, so that the first metal layer 210 can at least partially adhere to or cover the surface of the insulating member 200 facing the electrical connection portion 110.

[0099] Therefore, matching the shape of the first metal layer 210 with that of the insulating member 200 effectively increases the bonding area between the first metal layer 210 and the insulating member 200, which helps to improve the bonding force between the first metal layer 210 and the insulating member 200. Furthermore, by maximizing the contact area between the first metal layer 210 and the electrical connection portion 110 through the first metal layer 210, the stability of voltage conduction between the conductive member 400 and the electrical connection portion 110 is ensured.

[0100] In some embodiments, the shape of the second metal layer 220 matches the shape of the insulating member 200, connecting the two opposing sides of the metal structure member 300 and the insulating member 200.

[0101] Similar to the first metal layer 210 in the above embodiment, the shape of the second metal layer 220 is matched with that of the insulating member 200, which effectively increases the bonding area between the second metal layer 220 and the metal structural member 300, which helps to improve the bonding force between the second metal layer 220 and the insulating member 200. Furthermore, the first metal layer 210 further maximizes the contact area between the second metal layer 220 and the metal structural member 300, so as to ensure the stability of voltage conduction between the conductive member 400 and the metal structural member 300.

[0102] In some embodiments, the plane on which the first metal layer 210 is disposed of in the insulating member 200 is the top surface, and the plane on which the second metal layer 220 is disposed of in the insulating member 200 is the bottom surface; the first end 410 is disposed on the top surface, and the extension direction of the first end 410 is parallel to the top surface; the second end 420 is disposed on the bottom surface, and the extension direction of the second end 420 is parallel to the bottom surface.

[0103] In some alternative embodiments, please refer to Figure 6 and Figure 8The first end 410 and the second end 420 extend in the same direction.

[0104] In other words, the first end 410 and the second end 420 have a certain length, and their length directions extend along the top surface and the ground surface of the insulating member 200, thereby effectively increasing the contact area between the first end 410 and the electrical connection portion 110 and the contact area between the second end 420 and the metal structure member 300, thereby further improving the stability of the connection between the first metal layer 210 and the electrical connection portion 110, as well as the connection between the electrical connection portion 110 and the insulating member 200.

[0105] It is understood that the extension directions of the first end 410 and the second end 420 are not limited to extending circumferentially along the insulating member 200, but can also extend radially along the insulating member 200, or extend irregularly on the surface of the insulating member 200 to obtain a larger contact area.

[0106] The first end 410 and the second end 420 extend in the same direction. That is, the first end 410 and the second end 420 extend outward from the same side of the intermediate section 430, which can be the same radial direction or the same spatial direction of the intermediate section 430.

[0107] Compared to placing the first end 410 and the second end 420 on opposite sides of the middle section 430, the conductor 400 requires a longer space along the axial direction of the insulating member 200 to avoid the extension paths of the two ends; while the first end 410 and the second end are set on the same side, the two ends can extend in parallel on the same side, thereby effectively shortening the size of the conductor 400 in the radial direction of the insulating member 200, which helps to reduce the space occupied by the conductor 400.

[0108] The conductive element 400 in this embodiment can be disposed on the insulating element 200 in various ways. Specifically, the conductive element 400 can be integrally formed with the insulating element 200, i.e., it can be integrally formed with the insulating element 200 through pre-embedding; or the conductive element 400 can be directly formed in a specific area of ​​the insulating element 200 through processes such as chemical plating or vacuum sputtering, making the conductive element 400 a part of the insulating element 200's own structure, rather than an independently embedded component. This embodiment can also achieve the installation of the conductive element 400 through a slot structure on the insulating element 200. The specific installation structure of the conductive element 400 will be described below.

[0109] In some alternative embodiments, please refer to Figure 5 and Figure 8 The insulating member 200 has a first groove 201 on the side facing the electrical connection portion 110. The shape of the first groove 201 matches the shape of the first end portion 410, and the first end portion 410 is disposed in the first groove 201.

[0110] The first end 410 can be embedded in the first groove 201. The inner wall of the first groove 201 forms a circumferential constraint on the first end 410, restricting its circumferential rotation and radial movement, thereby ensuring that the docking position of the first end 410 and the electrical connection part 110 is always accurate, avoiding the reduction of contact area or conduction failure caused by offset.

[0111] In some alternative embodiments, please refer to Figure 5 and Figure 8 The insulating member 200 has a second groove 202 on the side facing the metal structural member 300. The shape of the second groove 202 matches the shape of the second end 420, and the second end 420 is disposed in the second groove 202.

[0112] The second groove 202 has the same function as the first groove 201. The inner wall of the second groove 202 forms a circumferential constraint on the second end 420, restricting its circumferential rotation and radial movement, thereby ensuring that the docking position of the second end 420 and the metal structural component 300 is always accurate, and avoiding the reduction of contact area or electrical failure caused by the offset of the second end 420.

[0113] For further information, please refer to [link / reference]. Figure 5 and Figure 7 The conductive member 400 also has an intermediate section 430, which is located between the first end 410 and the second end 420 to connect the first end 410 and the second end 420. The insulating member 200 has a through opening 230 at the position corresponding to the intermediate section 430, which communicates with the first groove 201 and the second groove 202, and the intermediate section 430 is disposed within the through opening 230.

[0114] The intermediate section 430 is a conductive body connecting the first end 410 and the second end 420. Its shape is adapted to the through-hole 230 on the insulating member 200. The through-hole 230 can extend along the thickness direction of the insulating member 200, so that the two ends of the through-hole 230 are respectively connected to the first groove 201 and the second groove 202 to form a continuous channel. The continuous channel can provide radial constraint on the intermediate section 430 so that the intermediate section 430 can be stably installed. At the same time, since the intermediate section 430 is located inside the through-hole 230, it can block the connection between the external conductive parts of the battery and the intermediate section 430, which helps to reduce the risk of creepage.

[0115] In some optional embodiments, the conductive element 400 can be fused. In this embodiment, the conductive element 400, through its fusion mechanism under fusion failure conditions, connects the terminal 100 to the external circuit when the battery casing accidentally comes into contact with the external circuit, thereby disconnecting the electrical connection between the terminal and the external circuit. This prevents the battery casing from rapidly heating up due to excessive current, thus helping to ensure the normal use of the battery.

[0116] Furthermore, the conductive element 400 has three working conditions: a melting condition, a first conducting condition, and a second conducting condition.

[0117] In the fusible condition, the conductive element 400 is configured to melt after transmitting the first current for a first time. In the first conductive condition, the conductive element 400 is configured to conduct the electrical connection 110 and the metal structural member 300 for a second time when transmitting the second current. In the second conductive condition, the conductive element 400 is configured to continuously conduct the electrical connection 110 and the metal structural member 300 when transmitting the third current.

[0118] The first current is greater than the second current, and the second current is greater than the third current.

[0119] The conductive element 400, through its fusion-breaking mechanism under fusion-breaking conditions, can melt itself to sever the electrical connection between the terminal 100 and the battery cover 500, thereby disconnecting the battery casing from the external circuit and helping to ensure the normal use of the battery. It can be understood that under fusion-breaking conditions, the initial current is relatively large, and the conductive element 400 generates sufficient heat in a short time to melt itself, thus cutting off the conductive path.

[0120] When the conductive element 400 transmits the second current, the conductive element 400 can maintain a conductive state for a second time relative to the melting condition. The heat generated by the conductive element 400 does not reach the melting threshold, allowing the conductive element 400 to remain conductive under a large current for a short period of time. The second time is longer than the first time.

[0121] When the conductor 400 transmits the third current, it can remain continuously conductive for an extended period. Because the third current is relatively small, the conductor 400 generates less heat, resulting in a stable temperature and ensuring that the heat generated by the battery casing does not affect the normal operation of the battery.

[0122] Therefore, the conductive element 400 in this embodiment, through its fusible mechanism, enables the conductive element 400 to simultaneously possess the dual functions of conductivity and safety protection. On the one hand, it achieves equipotential conduction between the terminal 100 and the metal structural component 300 to optimize voltage acquisition. On the other hand, when a large current is generated when the battery casing is connected to the external circuit, the circuit between the terminal 100 and the external circuit is quickly cut off through the fusible mechanism, thereby ensuring the normal operation of the battery.

[0123] In some alternative embodiments, the diameter d of the conductor 400 satisfies the following condition:

[0124]

[0125] In the formula, R is the resistance of the conductor 400, ρ is the resistivity of the conductor 400, l is the length of the conductor 400, I1 is the first current, t1 is the first time, m is the mass of the conductor 400, c is the specific heat capacity of the conductor 400, and t0 is the melting point of the conductor 400.

[0126] In this embodiment, by limiting the diameter d of the conductive element 400 under the aforementioned conditions, it is ensured that under the first current, the conductive element 400 can melt and break at a preset first time, blocking the dangerous circuit. Under normal second and third currents, it can conduct stably, ensuring equipotential conduction between the electrode 100 and the metal structural component 300, thus meeting the voltage acquisition requirements.

[0127] For example, I1 and t1 under the fuse-breaking condition can be limited to the following range: I1>5A, t1<3s. Then, based on the constraints of the conductor 400 under the fuse-breaking condition, conductors 400 of different materials and the diameter of the conductor 400 are selected, so that when the conductor 400 is in the fuse-breaking condition, the conductor 400 can fuse after transmitting the first current I1 for a first time t1, thus meeting the usage requirements of the conductor under the fuse-breaking condition.

[0128] In some alternative embodiments, the diameter d of the conductor 400 also satisfies the following condition:

[0129]

[0130] In the formula, I2 is the second current, t2 is the second time, and q2 is the heat transfer power of the conducting element 400 under the first conducting condition.

[0131] In this embodiment, by further limiting the diameter d of the conductive element 400, it is ensured that when the surface current of the battery casing is the second current, the conductive element 400 will trigger a meltdown after being conductive for more than the second time. However, the conductive element 400 will remain conductive during the second time and will not trigger a meltdown, thereby avoiding the impact on the normal operation of the battery due to accidental meltdown.

[0132] For example, I2 and t2 under the first conduction condition can be limited to the following range: 0.1A<I2≤5A,t2> 1h, and then, according to the constraints of the conductor 400 under the first conduction condition, conductors 400 of different materials and the diameter of the conductor 400 are selected, so that when the conductor 400 is in the first conduction condition, the conductor 400 can melt after transmitting the second current for a second time, thus meeting the usage requirements of the conductor under the first conduction condition.

[0133] In some alternative embodiments, the diameter d of the conductor 400 also satisfies the following condition:

[0134]

[0135] I3 2 R≤q3

[0136] In the formula, I3 is the third current, and q3 is the heat transfer power of the conductor under the second conduction condition.

[0137] In this embodiment, by further limiting the diameter d of the conductive element 400, it is ensured that the conductive element 400 is in the second conducting condition and in a low temperature state, thus ensuring the equipotential accuracy between the electrode and the metal structure and ensuring the long-term reliability of the voltage acquisition signal.

[0138] For example, I3 under the second conduction condition can be limited to the following range: I3≤0.1A. Then, according to the resistance requirement of the conductor 400 under the second conduction condition, conductors 400 of different materials and the diameter of the conductor 400 are selected so that the conductor 400 will not melt when it is in the second conduction condition.

[0139] Secondly, please refer to Figure 1 and Figure 2 This application also provides a battery cover structure, including a battery cover 500 and a terminal post assembly from any of the above embodiments. The battery cover 500 has a mounting portion, and the metal structural member 300 of the terminal post assembly is disposed in the mounting portion and connected to the battery cover.

[0140] The metal structural component 300 of the terminal assembly is embedded in the mounting part, which can be a hole and groove structure. The metal structural component 300 can be fixed and electrically connected to the battery cover plate 500 by welding or mechanical connection, so that the metal structural component and the battery cover plate 500 are at the same potential.

[0141] The battery cover structure includes a positive electrode cover, and the electrode assembly integrated in the positive electrode cover corresponds to the positive electrode of the battery. That is, the positive electrode and the battery cover can be made at the same potential through the conductive part at the positive electrode cover. Thus, when collecting the battery voltage, the battery voltage can be obtained by measuring the voltage between the negative electrode and the battery cover 500 or the battery casing at the negative electrode.

[0142] It is understood that the battery cover structure provided in the embodiments of this application all include the terminal post assembly of any of the above embodiments. Therefore, the battery cover structure also has the beneficial effects of the terminal post assembly of any of the above embodiments, so it will not be described in detail here.

[0143] Thirdly, embodiments of this application also provide a battery, including a battery casing and the aforementioned battery cover structure, the battery cover structure being disposed on the battery casing. Both the battery cover 500 and the battery casing are metal and can be welded together. When the terminal post 100 and the battery cover 500 are at the same potential, the terminal post 100 and the battery casing are also at the same potential. It can be understood that this battery also possesses the beneficial effects of the terminal post assembly of any of the above embodiments, namely, shortening the battery voltage measurement distance and facilitating voltage acquisition.

[0144] Fourthly, embodiments of this application also provide a battery pack structure including a plurality of the aforementioned batteries.

[0145] Fifthly, embodiments of this application also provide an electrical device, including a device body and the aforementioned battery pack, wherein the device body has an installation compartment and the battery pack is disposed within the installation compartment.

[0146] It is understood that the battery pack structure and electrical device provided in this application embodiment both include the terminal post assembly of any of the above embodiments. Therefore, the battery pack structure and electrical device also possess the beneficial effects of the terminal post assembly of any of the above embodiments. That is, because the battery pack and electrical device have the above-mentioned terminal post assembly, the battery pack has the function of easily collecting battery voltage, so that when abnormal battery voltage information is detected, it can be detected in a timely manner, thereby improving the safety of the battery pack and electrical device.

[0147] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0148] In the description of this utility model, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0149] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," etc., 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.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pole assembly, characterized in that, include: The pole (100) has an electrical connection portion (110) and a mounting portion (120) in the length direction. An insulating component (200) and a metal structural component (300) are both sleeved around the mounting portion (120), and the metal structural component (300) is located on the side of the insulating component (200) away from the electrical connection portion (110); the metal structural component (300) is configured to connect to the battery cover plate (500); A conductive element (400), at least a portion of which is disposed within the insulating element (200), the conductive element (400) connecting the electrical connection portion (110) and the metal structural element (300).

2. The pole assembly according to claim 1, characterized in that, The conductive member (400) has a first end (410) and a second end (420), and the insulating member (200) has a first metal layer (210) on the side facing the electrical connection portion (110), the first metal layer (210) connecting the electrical connection portion (110) and the first end (410). The insulating member (200) has a second metal layer (220) on the side facing the metal structure member (300), the second metal layer (220) connecting the metal structure member (300) and the second end (420).

3. The pole assembly according to claim 2, characterized in that, The shape of the first metal layer (210) matches the shape of the insulating member (200) to connect the electrical connection portion (110) and the two opposing sides of the insulating member (200).

4. The pole assembly according to claim 2, characterized in that, The shape of the second metal layer (220) matches the shape of the insulating element (200) to connect the two opposing sides of the metal structural element (300) and the insulating element (200).

5. The pole assembly according to claim 2, characterized in that, The insulating component (200) has the plane of the first metal layer (210) as its top surface, and the insulating component (200) has the plane of the second metal layer (220) as its bottom surface; The first end (410) is disposed on the top surface, and the extension direction of the first end (410) is parallel to the top surface; the second end (420) is disposed on the bottom surface, and the extension direction of the second end (420) is parallel to the bottom surface.

6. The electrode assembly according to claim 5, characterized in that, The first end (410) and the second end (420) extend in the same direction.

7. The pole assembly according to claim 2, characterized in that, The insulating member (200) has a first groove (201) on the side facing the electrical connection portion (110), the shape of the first groove (201) matching the shape of the first end portion (410), the first end portion (410) being disposed within the first groove (201).

8. The pole assembly according to claim 7, characterized in that, The insulating member (200) has a second groove (202) on the side facing the metal structural member (300), the shape of the second groove (202) matching the shape of the second end (420), the second end (420) being disposed within the second groove (202).

9. The pole assembly according to claim 8, characterized in that, The conductor (400) also has an intermediate section (430) located between the first end (410) and the second end (420) to connect the first end (410) and the second end (420). The insulating component (200) has a through opening (230) at a position corresponding to the intermediate section (430), the through opening (230) is connected to the first groove (201) and the second groove (202), and the intermediate section (430) is disposed in the through opening (230).

10. The pole assembly according to any one of claims 1-9, characterized in that, The conductive element (400) is a metal structure.

11. The pole assembly according to claim 10, characterized in that, The metal structure is a metal wire; and / or the conductor (400) is fusible.

12. A battery cover structure, characterized in that, include: Battery cover (500) has a mounting part; According to any one of claims 1-11, the metal structural member (300) in the terminal assembly is disposed within the mounting portion and connected to the battery cover (500).

13. A battery, characterized in that, include: Battery casing; The battery cover structure as described in claim 12 is disposed on the battery casing.

14. A battery pack, characterized in that, include: Multiple batteries as described in claim 13.

15. An electrical appliance, characterized in that, include: The equipment body, which includes an installation compartment; The battery pack of claim 14, wherein the battery pack is disposed within the mounting compartment.

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