Battery, battery pack, and battery device

Abstract

This utility model provides a battery, a battery pack, and a battery device. The battery includes a shell, a cover plate, terminals, and an insulating component. The cover plate covers the opening of the shell to form the outer shell of the battery, and has mounting holes. The terminals pass through the mounting holes, with their end faces exposed. The insulating component is located between the outer periphery of the terminals and the inner edge of the mounting holes, providing insulation for the terminals and the cover plate. The end faces form welding positions for busbar welding. Since the minimum distance d1 between the insulating components and the heat deformation temperature k of the insulating components satisfy 300 mm·℃ ≤ d1*k ≤ 1900 mm·℃, the welding position area and weld length can be guaranteed, ensuring the current carrying capacity of the terminals and busbars, while preventing the insulating components from melting under the residual heat of welding, thereby ensuring the insulation performance of the insulating components.

Description

Technical Field

[0001] This utility model relates to the field of battery structure technology, and in particular to a battery, battery pack and battery device. Background Technology

[0002] With the rapid development of new energy vehicles, the demand for fast charging of energy storage devices is also increasing. Currently, in order to achieve fast charging, the voltage of the battery pack is usually designed to be higher. This requires more batteries to be connected in series within the limited space of the battery pack, resulting in the battery thickness gradually becoming thinner. To meet the fast charging requirements, batteries have begun to use irregularly shaped terminals.

[0003] In related technologies, when fixing irregularly shaped terminals to a cover plate, irregularly shaped terminal holes are made in the cover plate, and a flange structure is set around the terminal holes to press and fix the terminal and sealing components. In addition, the side of the irregularly shaped terminal exposed through the terminal hole needs to be welded to the busbar. However, the heat generated during the welding process between the terminal and the busbar can affect the sealing components. For example, the sealing components may melt due to heat, causing insulation failure between the terminal and the cover plate, which in turn causes a short circuit in the battery. Utility Model Content

[0004] In view of the above problems, this utility model provides a battery, a battery pack and a battery device to solve the problem that the heat generated during the welding process of the terminal post and the busbar can easily cause the sealing component to melt due to heat, resulting in insulation failure between the terminal post and the cover plate.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, embodiments of the present invention provide a battery, comprising:

[0007] A housing having a receiving cavity and an opening at one end;

[0008] A cover plate, the cover plate being used to seal the opening, and the cover plate having mounting holes;

[0009] A terminal post, which passes through the mounting hole, has a welding position formed on its end face for welding the busbar;

[0010] And an insulating component, the insulating component being disposed between the outer periphery of the pole post and the inner edge of the mounting hole;

[0011] The minimum distance d1 between the welding position and the insulating component, and the heat deformation temperature k of the insulating component, satisfy the following condition: 200℃≤k≤380℃.

[0012] In some embodiments, the minimum distance d1 between the welding position and the insulating component satisfies: 1.5mm ≤ d1 ≤ 5mm.

[0013] In some embodiments, the heat distortion temperature k of the insulating component satisfies: 200℃≤k≤380℃.

[0014] In some embodiments, the electrode post is a copper-aluminum composite electrode post, and the proportion S of copper material in the thickness direction of the copper-aluminum composite electrode post satisfies: 0.01≤S≤0.4.

[0015] The thickness direction of the copper-aluminum composite electrode is the composite direction of the copper-aluminum composite electrode.

[0016] In some embodiments, the area ratio 'a' between the welding position and the end face of the pole post satisfies: 0.05 ≤ a ≤ 0.5.

[0017] In some embodiments, the battery further includes a cell disposed within the receiving cavity.

[0018] Secondly, this utility model embodiment provides a battery pack, which includes at least a busbar and the battery, wherein the busbar is welded to the terminal post of the battery.

[0019] In some embodiments, the thickness D of the busbar satisfies: 0.5mm ≤ D ≤ 3.0mm;

[0020] The thickness direction of the busbar is perpendicular to the welding surface.

[0021] In some embodiments, the busbar is soldered to the soldering position, and a solder mark is formed at the soldering position;

[0022] The multiple solder marks are spaced apart, and the distance d2 between two adjacent solder marks satisfies: 1mm≤d2≤4.5mm.

[0023] In some embodiments, the melting point F of the busbar satisfies: 660℃≤F≤1100℃.

[0024] Thirdly, this utility model embodiment provides a battery device, including: the battery, or the battery pack.

[0025] The battery, battery pack, and battery device provided in this embodiment of the utility model have the following advantages:

[0026] The battery provided in this embodiment can be connected in series or parallel with busbars to form a battery pack. The battery includes a cover plate, terminals, and insulating components. The cover plate has mounting holes. The terminals pass through the mounting holes, with their end faces exposed. The insulating components are located between the outer periphery of the terminals and the inner edge of the mounting holes, providing insulation for the terminals and the cover plate. The end faces form welding positions for welding the busbars. Since the minimum distance d1 between the insulating components and the heat deformation temperature k of the insulating components satisfy 300 mm·℃ ≤ d1*k ≤ 1900 mm·℃, the welding position area and weld length can be guaranteed, ensuring the current carrying capacity of the terminals and busbars, while preventing the insulating components from melting under the residual heat of welding, thereby ensuring the insulation performance of the insulating components.

[0027] In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by the batteries and electronic devices provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the battery structure provided in an embodiment of this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the battery concealed housing provided in an embodiment of the present utility model;

[0031] Figure 3 for Figure 2 A magnified view of the area near the pole of line a;

[0032] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0033] Figure 5 for Figure 3 A magnified view of a section at point B.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10-Cover plate; 11-Mounting hole;

[0036] 20 - Pole post; 21 - Welding position;

[0037] 30 - Insulating component; 31 - First insulating element; 32 - Second insulating element;

[0038] 40 - Shell. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of the embodiments of this utility model more apparent and understandable, 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 a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] A rechargeable battery, also known as a rechargeable battery or accumulator, is a battery that can be recharged after being discharged, allowing the active materials to be reactivated and reused. Utilizing the reversibility of chemical reactions, a new battery can be constructed; that is, after a chemical reaction converts into electrical energy, the electrical energy can be used to repair the chemical system, and then the chemical reaction can be converted back into electrical energy. Therefore, it is called a rechargeable battery. The main types of rechargeable batteries on the market include nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead-acid) batteries, lithium-ion batteries, and polymer lithium-ion batteries.

[0041] In related technologies, when fixing the battery terminals to the cover plate, irregularly shaped terminal holes are made in the cover plate, and a flange structure is set around the terminal holes to press and fix the terminals and sealing components. In addition, the side of the irregularly shaped terminal exposed through the terminal hole needs to be welded to the busbar.

[0042] Since the sealing components are insulating parts, they are usually made of plastic. The heat generated during the welding process between the pole and the busbar can easily cause the sealing components to melt, leading to insulation failure between the pole and the cover plate.

[0043] To address the aforementioned technical problems, this utility model provides a battery in which several batteries are connected in series or parallel via busbars to form a battery pack. By setting specific busbar welding points, the battery can ensure the current-carrying capacity of the terminals and busbars while preventing the insulation components from melting under the residual heat of welding, thereby guaranteeing the insulation and sealing performance of the insulation components.

[0044] It should be noted that the battery in this application is used in, but is not limited to, lithium batteries. For ease of explanation, this application only uses the application of the battery in lithium batteries as an example. The principle of the battery in other types of battery devices is essentially the same as that in lithium batteries, and will not be described in detail here.

[0045] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0046] To better understand this application, the following is combined with... Figures 1 to 5 The battery described in this application is described in detail as follows:

[0047] like Figure 1 As shown, the battery of this application includes a cover plate 10, terminals 20, an insulating assembly 30, and a housing 40. The housing 40 has a receiving cavity, and one end of the housing 40 has an opening, such as... Figure 3 and 4 As shown, the cover plate 10 is used to seal the opening, and the cover plate 10 has a mounting hole 11; the pole post 20 passes through the mounting hole 11, and the end face of the pole post 20 is exposed; the insulating component 30 is disposed between the outer periphery of the pole post 20 and the inner edge of the mounting hole 11; as shown Figure 2 As shown, the end face of the pole post 20 forms a welding position 21, which is used for bus welding; the minimum distance d1 between the welding position 21 and the insulating component 30, and the heat deformation temperature k of the insulating component 30, satisfy the following: 300 mm.℃≤d1*k≤1900 mm.℃.

[0048] Specifically, the battery comprises a cover plate 10, terminals 20, insulating components 30, and a housing 40. One end of the housing 40 has an opening, which is sealed by the cover plate 10, forming the outer casing structure of the battery. The cover plate 10 has mounting holes 11. The terminals 20 pass through the mounting holes 11, with their end faces exposed. The insulating components 30 are located between the outer periphery of the terminals 20 and the inner edge of the mounting holes 11, providing insulation for the terminals 20 and the cover plate 10. The end faces form welding positions 21 for busbar welding. Since the minimum distance d1 between the insulating components 30 and the heat deformation temperature k of the insulating components 30 satisfy 300 mm·℃ ≤ d1*k ≤ 1900 mm·℃, the area of ​​the welding position 21 and the length of the welding wire can be guaranteed, ensuring the current carrying capacity of the terminals 20 and the busbar, while preventing the insulating components 30 from melting under the residual heat of welding, thus ensuring the insulation performance of the insulating components 30.

[0049] In this embodiment, the minimum distance d1 between insulating components 30 and the heat deformation temperature k of insulating components 30 can be 300 mm·℃, 600 mm·℃, 700 mm·℃, 1100 mm·℃, 1500 mm·℃ and 1900 mm·℃, etc.

[0050] In this embodiment, the cover plate 10 is made of metal and is insulated from the terminal post 20 by a sealing component. It can be any shape, such as round or square, and its shape can be adapted to the shape of the battery casing. The cover plate 10 is an important part of the battery encapsulation. The cover plate 10 and the battery casing are fixed to the bare cell by laser welding or other methods and achieve a sealing effect to prevent electrolyte leakage.

[0051] In this embodiment, the electrode post 20 is the connection point between the internal electrode of the battery and the external circuit, and is responsible for conducting the current generated by the electrode to the external circuit, or conducting the current from the external circuit to the electrode.

[0052] Understandably, the terminal 20 can be made of metals such as aluminum, copper, and nickel, or an alloy material depending on actual needs. Its shape is usually determined by the battery design and application scenario, and can be round, square, etc. Round terminal 20s are more common in small batteries, while square terminal 20s may be more suitable for large battery modules. This embodiment does not impose specific limitations.

[0053] In some embodiments, the electrode post 20 is a copper-aluminum composite electrode post 20, and the proportion S of copper material in the thickness direction of the copper-aluminum composite electrode post 20 satisfies: 0.01≤S≤0.4. Specifically, the copper-aluminum composite electrode post 20 typically adopts a double-layer structure design of copper and aluminum layers. The upper part is aluminum material, which has good welding performance and is convenient for welding with the individual units of the module using aluminum sheets; the lower part is copper material, which contacts the electrolyte inside the battery to conduct electricity, has good conductivity and does not cause electrochemical corrosion, and copper material has good heat dissipation performance. In this embodiment, by controlling the thickness proportion S of copper material within the range of 0.01-0.4, it is possible to facilitate welding of the busbar to the electrode post 20 while providing good heat dissipation for the electrode post 20, thereby reducing the residual heat of the insulating component 30.

[0054] In this embodiment, the proportion S of copper material in the thickness direction of the copper-aluminum composite electrode 20 can be 0.01, 0.09, 0.20, 0.25, 0.32, 0.4, etc.

[0055] In this embodiment, the individual cells are connected in series or in parallel through busbars welded to the terminal posts 20. Laser welding is mainly used. During welding, tooling fixtures are used to fix the busbars and terminal posts 20 to ensure that the two fit tightly during welding and to prevent welding quality problems caused by excessive gaps. Then, a laser beam is used to align the welding area for welding. The welding path is usually a closed loop to ensure the stability and reliability of the welding.

[0056] In this embodiment, the end face is the welding surface of the pole post 20, which is exposed during welding. The welding position 21 is the part to be welded between the busbar and the end face of the pole post 20. The welding position 21 can be strip-shaped, arc-shaped or dot-shaped, and it can be positioned by positioning fixtures. After welding, a weld mark will be formed at the welding position 21.

[0057] Understandably, the insulating component 30 can be any insulating structure disposed between the pole post 20 and the cover plate 10 to achieve sealing and insulation between the pole post 20 and the cover plate 10. For example, the insulating component can be an insulating element and a connecting element. The insulating element is sleeved on the pole post body, and the connecting element is integrally formed with the pole post body through the first insulating element and spaced apart from the pole post body. This design can effectively isolate the pole post and the cover plate to prevent short circuits. The insulating component can also be an insulating ring, which can be sleeved on the circumferential periphery of the pole post and used in conjunction with a sealing ring. The sealing ring is located between the mounting part and the pole post. The insulating component 30 can also be an upper insulating element and a lower insulating element. The upper insulating element is disposed between the riveting block and the base plate, and the lower insulating element is disposed between the connecting element and the base plate. This design can effectively isolate the pole post and the cover plate to prevent short circuits.

[0058] In this embodiment, as Figure 3 and 4 As shown, the insulating component 30 includes a first insulating element 31 and a second insulating element 32. The first insulating element 31 can be disposed on one side or both sides of the second insulating element 32. The pole post 20 forms an insulating and sealed structure by fitting with the first insulating element 31 and the second insulating element 32.

[0059] In this embodiment, the first insulating element 31 is an insulating seal. The insulating seal fills the space between the electrode post and the sealing ring and includes multiple parts, such as the first insulating part, the sealing part and the second insulating part arranged in sequence. The insulating seal can not only provide good insulation effect, but also improve the sealing performance through its structural design to prevent electrolyte leakage.

[0060] Understandably, the first insulating element 31 can be made of materials such as polyphenylene sulfide (PPS), fluororubber, insulating ceramics or modified plastics. In this embodiment, in order to facilitate the control of the heat distortion temperature k of the first insulating element 31 within a certain range, the first insulating element 31 is made of polyphenylene sulfide or modified plastics.

[0061] In this embodiment, the second insulating component 32 is a sealing ring. The sealing ring material needs to have characteristics such as chemical corrosion resistance, high temperature resistance, good elasticity and sealing performance to ensure the safety and reliability of the battery. For example, the second insulating component 32 can be made of materials such as fluororubber, silicone, polyurethane, and polytetrafluoroethylene.

[0062] In this embodiment, the minimum distance d1 between the welding position 21 and the insulating component 30 is the shortest distance between the welding position 21 and the first insulating component 31 or the second insulating component 32. It is usually the distance between the welding position 21 and the first insulating component 31. Since the insulating component is attached to the pole post 20, this distance is also the shortest distance from the welding position to the edge of the pole post 20. In the square pole post 20, the minimum distance d1 is the distance from the welding position 21 to the long side of the pole post 20. Due to the area limitation of the end face of the pole post 20, if d1 is too small, the welding area will be too small, making it difficult to ensure the current carrying capacity between the pole post 20 and the busbar. If it is too large, the first insulating component 31 will be easily deformed by heat. The heat deformation temperature k is the minimum temperature required for the first insulating component 31 to melt, which is determined by the melting point of the first insulating component 31. In this embodiment, by setting the welding position 21, the value of d1*k is controlled within a certain range, thereby ensuring the current carrying capacity between the pole post 20 and the busbar while avoiding the first insulating component 31 and the second insulating component 32 from melting by heat.

[0063] In some embodiments, the minimum distance d1 between the welding position 21 and the insulating component 30 satisfies: 1.5mm ≤ d1 ≤ 5mm. Specifically, in order to ensure the current-carrying capacity between the electrode post 20 and the busbar while preventing the first insulating component 31 and the second insulating component 32 from melting due to heat, structurally, the distance between the welding position 21 and the insulating component 30 is mainly controlled. In this embodiment, by controlling the minimum distance d1 between the welding position 21 and the insulating component 30 to between 1.5mm and 5mm, the current-carrying capacity between the electrode post 20 and the busbar can be ensured, while preventing the first insulating component 31 and the second insulating component 32 from melting due to heat.

[0064] In this embodiment, the minimum distance d1 between the welding position 21 and the insulating component 30 can be 1.5mm, 2.1mm, 3mm, 4.5mm, 5mm, etc.

[0065] In some embodiments, the heat distortion temperature k of the insulating component 30 satisfies: 200℃≤k≤380℃. Specifically, if the value of k is too large, the insulating component 30 is prone to deformation at high temperatures. If the value of k is too large, the manufacturing difficulty of the insulating component 30 is high, thereby increasing the assembly cost of the insulating component 30. Therefore, by controlling the heat distortion temperature k of the insulating component 30 between 200℃ and 380℃, it is possible to avoid the insulating component 30 from melting under heat while satisfying d1, and the assembly cost of the insulating component 30 can be reduced.

[0066] In this embodiment, the heat distortion temperature k of the insulating component 30 can be 200℃, 250℃, 275℃, 300℃, 250℃, and 380℃, etc.

[0067] In some embodiments, the area ratio 'a' between the welding position 21 and the end face of the pole post 20 satisfies: 0.05 ≤ a ≤ 0.5. Specifically, the smaller the area ratio 'a' between the welding position 21 and the end face of the pole post 20, the less welding heat is generated, but the current flow is poor. Therefore, by controlling the area ratio 'a' between 0.05 and 0.5, welding heat can be reduced while ensuring the current flow capacity between the pole post 20 and the busbar.

[0068] In this embodiment, the area ratio 'a' between the welding position 21 and the end face of the pole post 20 can be 0.05, 0.1, 0.25, 0.35, 0.45, and 0.5, etc.

[0069] In this embodiment, the areas of both the welding position 21 and the pole post 20 are measured in square millimeters.

[0070] In some embodiments, the battery further includes an insulating plate (not shown) disposed on the side of the cover plate 10 facing the inside of the battery to separate the cover plate 10 from the battery cell.

[0071] Understandably, the insulating plate can be used to achieve electrical isolation between the cover plate 10 and the battery cell, block leakage current between the battery cell and the metal cover plate 10, and ensure electrical safety. In addition, the insulating plate can also delay the transmission of flame or high temperature to the cover plate 10 during thermal runaway, thereby improving the overall stability of the battery.

[0072] In some embodiments, the battery further includes a battery cell disposed within a receiving cavity. Specifically, by providing the aforementioned cover plate 10, the battery can prevent the insulating component 30 from melting under the residual heat of welding during the welding process between the busbar and the battery, thereby ensuring the insulation and sealing performance of the insulating component 30.

[0073] Understandably, the battery cell can be any type of rechargeable battery cell, such as lithium battery or lead-acid battery. The battery can be a prismatic battery, and correspondingly, the cross-section of the battery cell is square, and the cover plate 10 is also square; or, the battery can be a cylindrical battery, and correspondingly, the cross-section of the battery cell is circular, and the cover plate 10 is also circular.

[0074] The housing 40 provides installation space for the battery cell through a receiving cavity, and the opening facilitates the assembly of the battery with the housing 40. The cover plate 10 seals the opening to form a closed structure to isolate the external environment. The battery cell is located inside the receiving cavity and is connected to the electrodes through the battery.

[0075] This embodiment of the invention also provides a battery pack, a busbar, and the aforementioned battery, with the busbar welded to the battery terminal 20. Specifically, the battery pack structure formed by welding the battery and the busbar can ensure good current flow performance between the terminal 20 and the busbar while protecting the structure of the insulation component 30, thus ensuring the stability of the battery pack performance.

[0076] In this embodiment, the busbar is welded to the welding position 21, and a solder mark is formed at the welding position 21.

[0077] In some embodiments, the thickness D of the busbar satisfies: 0.5mm ≤ D ≤ 3.0mm. Specifically, the smaller the thickness, the less heat is generated during welding, but excessive thickness will hinder heat dissipation. Therefore, controlling the thickness of the busbar between 0.5mm and 3.0mm can reduce welding heat while ensuring the heat dissipation performance of the busbar during welding of the busbar and the pole 20, thereby protecting the insulating component 30.

[0078] In this embodiment, the thickness of the busbar can be 0.5mm, 1.1mm, 1.6mm, 2mm, 3mm, etc.

[0079] In some embodiments, the shape of the weld mark includes any one or more of the following: strip, arc, or dot. Specifically, the shape of the weld mark corresponds to the welding position 21, and it can be any one or more of the following: strip, arc, or dot. Its shape can be adapted to the actual welding requirements. Strip weld marks can provide a longer welding path, thereby increasing the welding area and welding strength; arc weld marks can make the stress evenly distributed in the welding area, reducing stress concentration points, thereby improving the fatigue resistance of the weld joint; dot weld marks have a short welding time, which can significantly improve production efficiency.

[0080] In some embodiments, multiple solder marks are spaced apart, and the distance d2 between two adjacent solder marks satisfies: 1mm ≤ d2 ≤ 4.5mm. Specifically, by setting multiple solder marks spaced apart, the welding area can be made uniform, thereby ensuring uniform current flow. If the distance d2 between the solder marks is too large, d1 will be too small, resulting in increased heating of the insulation component 30. If it is too small, the welding area will be too small, resulting in poor current flow. Therefore, keeping the distance d2 between two solder marks between 1mm and 4.5mm can reduce the heating of the insulation component 30 while ensuring the current flow capacity between the busbar and the terminal post 20.

[0081] In this embodiment, the distance d2 between two adjacent solder marks can be 1mm, 2mm, 2.5mm, 4mm, and 4.5mm, etc.

[0082] In some embodiments, the melting point F of the busbar satisfies: 660℃≤F≤1100℃. Specifically, if the melting point of the busbar is too high, the welding temperature will be too high, which may easily cause the insulating component 30 to melt. If the melting point is too low, the weld joint may not be able to form a weld joint with sufficient strength during the welding process, resulting in insufficient mechanical strength of the welded area and affecting the structural stability of the battery pack. Therefore, the melting point F of the busbar is set between 660℃ and 1100℃, which can ensure the welding strength while avoiding the melting of the insulating component 30 due to excessive welding temperature.

[0083] In this embodiment, the melting point F of the busbar can be 660℃, 700℃, 895℃, 1030℃, and 1100℃, etc.

[0084] A fourth aspect of this utility model provides a battery device, including the battery or battery pack described above. Specifically, the battery device can be a power module for any electrical device such as new energy vehicles, electric bicycles, electric trains, aircraft, energy storage cabinets, smart homes, drones, and medical equipment. The battery device can include the battery or battery pack described in the above embodiments. By setting the battery pack structure, the battery device can ensure a stable current flow between the busbar and the terminal 20, ensuring stable current input and output, while also ensuring good sealing and insulation of the insulating component 30, thereby improving the stability of the battery device.

[0085] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0086] In the description of this specification, references to "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] 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. 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 battery, characterized in that, include: A housing having a receiving cavity and an opening at one end; A cover plate, the cover plate being used to seal the opening, and the cover plate having mounting holes; A terminal post, which passes through the mounting hole, has a welding position formed on its end face for welding the busbar; And an insulating component, the insulating component being disposed between the outer periphery of the pole post and the inner edge of the mounting hole; The minimum distance d1 between the welding position and the insulating component, and the heat deformation temperature k of the insulating component, satisfy the following condition: 300 mm·℃ ≤ d1*k ≤ 1900 mm·℃.

2. The battery according to claim 1, characterized in that, The minimum distance d1 between the welding position and the insulating component satisfies: 1.5mm≤d1≤5mm.

3. The battery according to claim 1, characterized in that, The heat distortion temperature k of the insulating component satisfies: 200℃≤k≤380℃.

4. The battery according to any one of claims 1-3, characterized in that, The electrode post is a copper-aluminum composite electrode post, and the proportion S of copper material in the thickness direction of the copper-aluminum composite electrode post satisfies: 0.01≤S≤0.

4. The thickness direction of the copper-aluminum composite electrode is the composite direction of the copper-aluminum composite electrode.

5. The battery according to any one of claims 1-3, characterized in that, The area ratio 'a' between the welding position and the end face of the pole post satisfies: 0.05 ≤ a ≤ 0.

5.

6. The battery according to any one of claims 1-3, characterized in that, Also includes: The battery cell is disposed within the receiving cavity.

7. A battery pack, characterized in that, It includes at least a busbar and a battery as described in any one of claims 1-6, wherein the busbar is welded to the terminal of the battery.

8. The battery pack according to claim 7, characterized in that, The thickness D of the busbar satisfies: 0.5mm ≤ D ≤ 3.0mm; The thickness direction of the busbar is perpendicular to the welding surface.

9. The battery pack according to claim 7, characterized in that, The busbar is welded to the welding position, and a solder mark is formed at the welding position; The multiple solder marks are spaced apart, and the distance d2 between two adjacent solder marks satisfies: 1mm≤d2≤4.5mm.

10. The battery pack according to claim 7, characterized in that, The melting point F of the busbar satisfies: 660℃≤F≤1100℃.

11. A battery device, characterized in that, include: The battery according to any one of claims 1-8, or the battery pack according to any one of claims 7-10.

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