Battery and power battery system

Abstract

Battery, comprising: a housing having a first end in a longitudinal direction; a cover plate disposed at least at the first end of the housing; a cell disposed in the housing, the cell having a cell body and a tab connected to the cell body; an insulating element arranged between the cover plate and the cell; a support frame arranged between the cell body and the cover plate, the support frame having an opening facing the cover plate so that the tab passes through the opening, and the support frame having a first plate and a second plate arranged at intervals with respect to the opening, wherein the first plate extends to the second plate and extends to the cover plate and the first plate is inclined to the longitudinal direction, and a first inclination angle α1 is formed between an extending direction of the first plate and the longitudinal direction; the second plate extends to the first plate and extends to the cover plate, and the second plate is inclined to the longitudinal direction, and a second inclination angle α2 is formed between an extension direction of the second plate and the longitudinal direction; and the width of the opening is “b”, the thickness of the tab is “m” and the above parameters are met: 0.6° ≤ (α 1 + α 2 ) × mb ≤ 680 °.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the technical field of power batteries, in particular to a battery and a power battery system. BACKGROUND

[0002] A power battery is a battery that provides a power source for tools and generally comprises a metal casing, a cell housed within the metal casing, and a cover plate assembly secured to the top of the metal casing. The cell typically has a tab structure. The tab structure is a metal conductor that carries the positive and negative electrodes outside the cell. This conductor is the contact point when the positive and negative electrodes of the cell are charged and discharged.

[0003] Currently, the battery generally has a retaining frame in the metal shell to grasp and position the tab structure. However, the existing retaining frame has poor fit with the tab structure, and it is difficult for some tab designs to pass through the existing retaining frame, which affects the assembly efficiency of the tab structure and the retaining frame. This not only affects the assembly yield of the battery, but also easily causes the tab structure to crack, thereby affecting the overcurrent capacity of the tab. In addition, for some tab structures, the existing retaining frame has poor guiding effect, and the tab structure is difficult to grasp in the retaining frame and is prone to misalignment, resulting in an overlap between the tab and the battery shell and causing a short circuit in the battery. SUMMARY OF THE UTILITY MODEL

[0004] The object of the present utility model is to provide a battery and a power battery system that can coordinate the structure of a support frame by adjusting the structural portion of the support frame to solve the problem of poor fit between the tab structure and the support frame.

[0005] To achieve the above objective, the present utility model uses the following technical scheme:

[0006] A battery comprising: a housing having a first end and a second end oppositely disposed in a longitudinal direction; a cover plate disposed at least at the first end of the housing and having a terminal; a cell disposed in the housing, the cell having a cell body and a tab connected to the cell body; an insulating element arranged between the cover plate and the cell; a holding frame arranged between the cell body and the cover plate, wherein the holding frame has an opening facing the cover plate so that the tab passes through the opening and is connected to the connection terminal, and the holding frame has a first plate and a second plate arranged at intervals with respect to the opening, the first plate extending toward the second plate and extending toward the cover plate, the first plate being inclined toward the longitudinal direction, and a first inclination angle α1 being formed between an extending direction of the first plate and the longitudinal direction; the second plate extends to the first plate and extends to the cover plate, and the second plate is inclined to the longitudinal direction, and a second inclination angle α2 is formed between an extension direction of the second plate and the longitudinal direction; and the width of the opening is “b”, the thickness of the tab is “m” and the above parameters are met: 0.6°≤(α1+α2)×mb≤680°.

[0007] Based on the battery described above, the present application also provides a power battery system comprising a bus bar and at least two of the above batteries, and the bus bar is electrically connected to the terminals of the two batteries.

[0008] Compared with the prior art, the battery and power battery system of the present application have the following advantageous effects: The battery and power battery system of the present application adjust the value of the first inclination angle α1, the value of the second inclination angle α2, the width "b" of the opening, and the thickness "m" of the tab, so that the first inclination angle α1, the second inclination angle α2, the width "b" of the opening, and the thickness "m" of the tab can be mutually adjusted. In this way, the inclination angles of the first plate and the second plate can be adjusted to the specifications of the tab, and an appropriate space can be provided between the first plate, the second plate, and the cover plate to accommodate the tab passing through the opening, thereby ensuring that the support frame can achieve a good convergence effect to ensure the guiding effect of the support frame on the tab.Furthermore, the fit between the first inclination angle α1, the second inclination angle α2, the width "b" of the opening, and the thickness "m" of the tab allows the opening dimension to be adjusted to the specifications of the tab, allowing the tab to pass more easily through the support frame. This can prevent the opening from being too small, which can impair the efficiency of the tab passing through the opening and thus affect the overall assembly yield of the battery. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram of a battery according to an embodiment of the present application; Fig. 2 is an enlarged view of “A” in Fig. 1; Fig. 3 is a schematic diagram of a housing according to an embodiment of the present application; Fig. 4 is a schematic cross-sectional diagram of a battery according to an embodiment of the present application; Fig. 5 is an enlarged view of “B” in Fig. 4; Fig. 6 is an enlarged view of “C” in Fig. 5; Fig. 7 is a schematic diagram of a support frame according to an embodiment of the present application; Fig. 8 is an enlarged view of “D” in Fig. 7; Fig. 9 is a schematic diagram of a support frame at a different angle according to an embodiment of the present application; Fig. 10 is an enlarged view of “E” in Fig. 9; Fig. 11 is a schematic diagram of the fit between a guide member, a weld, and a tab according to an embodiment of the present application.

[0009] In the figures: 100. Battery; X, First direction; Y, Second direction; Z, Third direction; 1. Casing; 1a, First end; 1b, Second end; 2, Open end; 3. Cover plate; 4. Cell; 4a, Cell body; 4b, Tab; 5. Insulating member; 6. Support frame; 6a, First plate; 60a, First upper plate surface; 61a, First lower plate surface; 62a, First side plate surface; 63a, First included angle; 64a, Second included angle; 6b, Second plate; 60b, Second upper plate surface; 61b, Second lower plate surface; 62b, Second side plate surface; 63b, Third included angle; 64b, Fourth included angle; 6c, Frame body; 6d, Partition wall; 6e, First cavity; 6f, Second cavity; 6g, Third cavity; 6h, First receiving space; 6i, Second receiving space; 7, Connection terminal; 8, Opening; 9, Liquid injection hole; 10, Guide element; 11, Weld point. DETAILED DESCRIPTION OF EMBODIMENTS

[0010] Embodiments of the present utility model are described in more detail below in conjunction with the attached drawings and examples. The following examples serve to illustrate the present utility model and are not intended to limit the scope of protection of the present utility model.

[0011] In the description of the present utility model, it should be understood that when an element is described as being "attached to" or "disposed on" another element, it may be located directly on the other element or indirectly on the other element. When an element is described as being "connected" to another element, it may be directly connected to the other element or indirectly connected to the other element. The terms "installed," "connected," and "connected" should be understood in a broad sense, e.g., it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection via an intermediate medium; it may be the internal connection of two elements or the interaction relationship of two elements.Those skilled in the art will be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0012] In the description of the present utility model, it should be noted that the terms "height", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like used in the present utility model to refer to the orientation or positional relationship are based on the orientation or positional relationship in the drawings and are only used to conveniently describe the present utility model and simplify the description, and do not indicate or imply that the device or element in question must have a particular orientation or must be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

[0013] In the description of the present utility model, it should be understood that the terms "first" and "second" used in the present utility model are used for descriptive purposes only and cannot be understood to indicate a relative importance or implicitly indicate the number of specified technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Examples

[0014] Referring to the Fig. 1-11, an embodiment of the present application provides a battery 100 including a casing 1, wherein the outer contour of the casing 1 is a cylindrical structure in the shape of a rectangular prism, and the interior of the casing 1 is an installation space for mounting the battery 100. Both ends of the casing 1 are open ends 2 to connect the interior of the casing 1 to the exterior. The casing 1 is commonly used to encapsulate components such as cells and electrolytes. In different battery structures, the casing 1 may have various shapes and dimensions, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, etc. Of course, the shape of the casing 1 may also be determined according to the specific shape and size of the cell.Furthermore, the material of the housing 1 can be diverse, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0015] In the present embodiment, the case 1 has a first direction "X", a second direction "Y", and a third direction "Z" which are perpendicular to each other. The direction of the two open ends 2 of the case 1 is the first direction "X" of the battery 100, that is, the longitudinal direction, and the end where one of the open ends 2 is located is the first end 1a of the case 1, and the end where the other open end 2 is located is the second end 1b of the case 1; the direction in which the long side of the open end 2 is located is the second direction "Y" of the battery 100, that is, the width direction, and the direction in which the short side of the open end 2 is located is the third direction "Z" of the battery 100, that is, the thickness direction.

[0016] Referring to the Fig. 1-7, the battery 100 of the present embodiment includes a casing 1, a cover plate 3, a cell 4, an insulating member 5, and a holding frame 6. The casing 1 has a first end 1a and a second end 1b arranged opposite each other in the longitudinal direction; the cover plate 3 is mounted on the first end 1a of the casing 1 and extends along the second direction "Y," and a terminal 7 is arranged on the cover plate 3, and the terminal 7 extends to the inside of the casing 1; the cell 4 is arranged in the casing 1, and the cell 4 has a cell body 4a and a tab 4b connected to the cell body 4a; the insulating member 5 is arranged between the cover plate 3 and the cell 4 and arranged around the terminal 7 to form an electrical insulation structure between the casing 1 and the terminal post 7.

[0017] It should be noted that the cover plate 3 refers to a component that covers the open end 2 of the housing 1 to isolate the receiving space within the housing 1 from the external environment. The shape of the cover plate 3 can be adapted to the shape of the housing 1 to achieve insulation in a mating relationship with the housing 1. The cover plate 3 can be made of a material with a certain hardness and strength (such as aluminum alloy).

[0018] Note that cell 4 includes a separator and two electrodes with opposite polarities, a positive electrode and a negative electrode. Cell 4 operates by moving metal ions between the positive electrode and the negative electrode. The cycling process of cell 4 is the process by which metal ions move from the positive electrode to the negative electrode and then from the negative electrode to the positive electrode. Tab 4b is a constituent part of cell 4. Tab 4b, which is electrically connected to the electrode, typically includes a positive tab and a negative tab, with the positive tab electrically connected to the positive electrode and the negative tab electrically connected to the negative electrode. Cell 4 realizes charging and discharging through the positive tab and the negative tab.

[0019] It should be noted that the electrode comprises a current collector and an active material layer, and the active material layer is coated on the surface of the current collector. If the electrode is a positive electrode, the current collector material can be aluminum, and the active material layer material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganate, etc. If the electrode is a negative electrode, the current collector material can be copper, and the active material layer material can be carbon or silicon, etc.

[0020] It should be noted that the support frame 6 can be used to isolate the electrical connection components in the housing 1 from the cover plate 3 to reduce the risk of short circuits. For example, the material of the support frame 6 can be plastic, rubber, etc.

[0021] The holding frame 6 is arranged between the cell body 4a and the cover plate 3 and has an opening 8 facing the cover plate 3 so that the tab 4b can pass through the opening 8, and the tab 4b passing through the opening 8 is electrically connected to the terminal 7. The holding frame 6 has a first plate 6a and a second plate 6b arranged at intervals with respect to the opening 8.The first plate 6a extends to the second plate 6b and extends to the cover plate 3, and the first plate 6a is inclined in the longitudinal direction, and a first inclination angle α1 is formed between the extending direction of the first plate 6a and the longitudinal direction of the housing 1; the second plate 6b extends to the first plate 6a and extends to the cover plate 3, and the second plate 6b is inclined in the longitudinal direction, and a second inclination angle α2 is formed between the longitudinal direction of the housing 1; and the width of the opening 8 is "b", the thickness of the tab 4b is "m", and the above parameters satisfy:. 0.6°≤(α1+α2)×mb≤680°

[0022] It should be noted that in the above formula (1), the numerical units of the first inclination angle α1 and the second inclination angle α2 are degrees (°), the numerical unit of the width “b” of the opening is 8 millimeters, and the numerical unit of the thickness “m” of the tab is 4b millimeters.

[0023] For example, the ratio of the first inclination angle α1, the second inclination angle α2, the width “b” of the opening 8 and the thickness “m” of the tab 4b may be one of 0.6°, 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 200°, 300°, 400°, 500°, 600° and 680° based on the formula (1).

[0024] It should be noted that the first inclination angle α1 of the present embodiment refers to the acute angle formed between the extending direction and the longitudinal direction of the first plate 6a, and correspondingly, the second inclination angle α2 refers to the acute angle formed between the extending direction and the longitudinal direction of the second plate 6b.

[0025] It should be noted that the width “b” of the opening 8 of the present embodiment refers to the vertical distance between the end of the first plate 6a facing the side on which the second plate 6b is located and the end of the second plate 6b facing the side on which the first plate 6a is located in the third direction “Z”.

[0026] It is understood that the length of the tab 4b is usually greater than the distance between the cell body 4a and the cover plate 3, so that a certain space for accommodating the tab 4b is provided between the holding frame 6 and the terminal post 7, so that the tab 4b can be placed in the space within the holding frame 6 after passing through the opening 8 to engage the tab 4b. Therefore, the ratio of the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b based on the formula (1) reflects the degree of fit between the holding frame 6 and the tab 4b.If the ratio of the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b based on the formula (1) is too small, the volume of the space between the support frame 6 and the terminal post 7 will also be too small, which is not conducive to the convergence of the tab 4b. This results in a poor guiding effect of the support frame 6 on the tab 4b, which can easily deflect the tab 4b, resulting in the problem that the tab 4b overlaps the housing 1 and then causes insulation failure, leading to the risk of battery short circuit. If the ratio of the first inclination angle α1, the second inclination angle α2, the width “b” of the opening 8 and the thickness “m” of the tab 4b based on the formula (1) is too large, the opening 8 becomes correspondingly smaller.This will increase the difficulty for the tab 4b to pass through the opening 8, which will affect the efficiency of passing the tab 4b and then affect the overall assembly yield of the battery 100, and this will also likely cause the tab 4b to crack, which will affect the overcurrent capacity of the tab 4b.

[0027] Therefore, with the battery 100 of the present embodiment, the value of the first inclination angle α1, the value of the second inclination angle α2, the dimension of the width “b” of the opening 8, and the dimension of the thickness “m” of the tab 4b are set so that the ratio of the first inclination angle α1, the second inclination angle α2, the width “b” of the opening 8, and the thickness “m” of the tab 4b is controlled in the range of 0.6° to 680° based on the formula (1), whereby the first inclination angle α1, the second inclination angle α2, the width “b” of the opening 8, and the thickness “m” of the tab 4b can be adjusted to each other. In this way, the inclination angles of the first plate 6a and the second plate 6b can be adapted to the specifications of the tab 4b, and a suitable space can be provided between the first plate 6a, the second plate 6b and the cover plate 3 to accommodate the tab 4b passing through the opening 8.This ensures that the holding frame 6 can achieve a good convergence effect to ensure the guiding effect of the holding frame 6 on the tab 4b, avoid offset of the tab 4b, prevent overlap of the tab 4b with the case 1, and thus prevent short circuit of the battery. In addition, due to the fit between the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b, the dimension of the opening 8 can be adapted to the specifications of the tab 4b, and the tab 4b can be easily passed through the holding frame 6, thereby improving the assembly efficiency of the tab structure and the holding frame 6, ensuring the overall assembly yield of the battery, and preventing tearing of the tab 4b, which ensures the overcurrent capacity of the tab 4b.

[0028] It is understood that batteries 100 of different specifications will have different internal structures, which usually results in the distance between the support frame 6 and the terminal post 7 changing, thereby affecting the arrangement angle of the first plate 6a and the second plate 6b. Therefore, the value of the first inclination angle α1 and the value of the second inclination angle α2 are usually kept within a suitable range to meet the assembly requirements of batteries 100 of different specifications. For example, as an example of the present embodiment, the first inclination angle α1 may be within the range of 15° to 88° to ensure the degree of fit between the tab 4b and the support frame 6, so that the support frame 6 can meet the guiding requirements of the tab 4b and also make it easy for the tab 4b to pass through the opening 8 of the support frame 6.The first inclination angle α1 with an angle value larger than this range has the problem of being too large an angle, making it difficult for the tab 4b to pass through the support frame 6; the first inclination angle α1 with an angle value smaller than this range has the problem of being too small an angle, easily resulting in insufficient guiding effect of the support frame 6 and poor fitting between the tab 4b and the support frame 6.

[0029] Of course, the degree of fit between the tab 4b and the support frame 6 can also be adjusted by adjusting the value of the second inclination angle α2. For example, the second inclination angle α2 can be in the range of 15° to 88°. The second inclination angle α2 with an angle value within this range can also enable the support frame 6 to meet the guidance requirements of the tab 4b and allow the tab 4b to easily pass through the opening 8 of the support frame 6.

[0030] For example, the first inclination angle α1 can be selected from one of the angle values ​​15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80° and 88°, and the second inclination angle α2 can be selected from one of the angle values ​​15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80° and 88°.

[0031] Of course, the first inclination angle α1 and the second inclination angle α2 may have values ​​within the above-mentioned range, which may result in a significant difference between the first inclination angle α1 and the second inclination angle α2. This may compromise the structural strength of the support frame 6. Therefore, for the same battery 100, the first inclination angle α1 and the second inclination angle α2 are usually close to each other. As an example of the present embodiment, the first inclination angle α1 and the second inclination angle α2 satisfy, for example: 0.5≤α1α2≤2, so that it can be ensured that the first plate 6a and the second plate 6b extend symmetrically, and the structural strength of the support frame 6 is better. In addition, in this way, it can be ensured that during the process in which the tab 4b passes through the opening 8, the time at which the tab 4b comes into contact with the first plate 6a and the second plate 6b is basically the same, in order to avoid the first plate 6a and the second plate 6b coming into contact with the tab 4b one after the other, which leads to a double interception of the tab 4b and impairs the efficient passage of the opening 8 by the tab 4b. For example, the ratio of α1α2 one of 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.

[0032] Note that the value of the first inclination angle α1 and the value of the second inclination angle α2 satisfy the above relationship, and the extension lengths of the first plate 6a and the second plate 6b are not required to be the same. According to the space planning inside the battery 100, the first plate 6a and the second plate 6b may adopt a structural configuration in which one of the extension lengths is longer than the other, which can also provide a larger space for the tab 4b to be detected.

[0033] It should be understood that batteries 100 of different specifications also have different requirements for the thickness "m" of the tab 4b and the width "b" of the opening 8. If the thickness "m" of the tab 4b is too large, the difficulty of the tab 4b passing through the opening 8 increases. If the thickness "m" of the tab 4b is too small, it will affect the overcurrent capacity of the battery 100. Therefore, the thickness "m" of the tab 4b is usually kept within a suitable range to meet the assembly requirements of batteries 100 of different specifications. For example, as an example of the present embodiment, the thickness "m" of the tab 4b is in the range of 0.2 to 4 mm. The tab 4b with a thickness "m" within this range can make it easy for the tab 4b to pass through the opening 8 of the holding frame 6 and ensure that the overcurrent capacity of the tab 4b can meet the requirements of the battery 100.

[0034] For example, the thickness "m" of the tab 4b can be selected from any one of 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, 1.5 mm, 2 mm, 2.3 mm, 2.5 mm, 3 mm, 3.2 mm, 3.5 mm, 3.8 mm, and 4 mm. It should be noted that the tab 4b usually has multiple layers of sheets and multiple layers of insulating plates, and the thickness "m" of the tab 4b is the total thickness of the tab 4b, that is, the sum of the product of the single-layer thickness of the sheet and the number of sheet layers, and the product of the single-layer thickness of the insulating plate and the number of insulating plate layers.

[0035] Of course, the width "b" of the opening 8 is also usually kept within a suitable range to meet the assembly requirements of batteries 100 of various specifications. For example, as an example of the present embodiment, the width "b" of the opening 8 is in the range of 1 to 12 mm, so that the opening 8 can be adapted to the specifications of the tab 4b, thereby ensuring that the tab 4b can easily pass through the holding frame 6, improving the assembly efficiency of the tab structure and the holding frame 6, ensuring the overall assembly yield of the battery, and preventing tearing of the tab 4b, thereby ensuring the overcurrent capacity of the tab 4b.

[0036] For example, the width “b” of the opening 8 can be chosen from one of the following sizes: 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm.

[0037] The tab 4b is usually connected to the end of the cell body 4a so that, after the tab 4b has passed through the opening 8, it enters the space between the support frame 6 and the terminal post 7. Since the length of the tab 4b is often greater than the distance between the support frame 6 and the terminal post 7, the tab 4b must be grasped between the support frame 6 and the terminal post 7 as the tab 4b enters the space between the support frame 6 and the terminal post 7 to ensure that the tab 4b, which is electrically connected to the connection terminal 7, does not touch any other electrical components. Referring to Fig. 5, as an example of the present embodiment, the first plate 6a is arranged below the terminal post 7, and a first receiving space 6h is formed between the first plate 6a and the terminal post 7; in addition, the second plate 6b is arranged below the terminal post 7, and a second receiving space 6i is formed between the second plate 6b and the terminal post 7. The tab 4b passes through the opening 8 and extends into the second receiving space 6i, completing the convergence in the second receiving space 6i. In this way, due to the inclined arrangement of the second plate 6b, the tab 4b is constricted by the second plate 6b, so that the tab 4b cannot easily deviate from the second receiving space 6i, thereby ensuring the convergence and positioning effect of the tab 4b.

[0038] Of course, in other structures of the battery 100, the tab 4b, after passing through the opening 8, may also extend into the first receiving space 6h and complete the convergence in the first receiving space 6h, thereby also achieving the same convergence effect. Alternatively, in other structures of the battery 100, the tab 4b, after passing through the opening 8, may extend into the first receiving space 6h and the second receiving space 6i and complete the convergence in the first receiving space 6h and the second receiving space 6i, thereby achieving the same convergence effect.

[0039] Referring to Fig. 6, the first plate 6a and the second plate 6b of the present embodiment are plate-shaped structures, wherein the first plate 6a has a first upper plate surface 60a and a first lower plate surface 61a arranged at intervals in the longitudinal direction. A first side plate surface 62a is connected between the first upper plate surface 60a and the first lower plate surface 61a, and the first side plate surface 62a is located in the opening 8 and faces the second plate 6b, and the first upper plate surface 60a and the first side plate surface 62a form a first included angle 63a, and the first lower plate surface 61a and the first side plate surface 62a form a second included angle 64a. Further, the second plate 6b has a second upper plate surface 60b and a second lower plate surface 61b arranged at intervals in the longitudinal direction.A second side plate surface 62b is connected between the second upper plate surface 60b and the second lower plate surface 61b, and the second side plate surface 62b is located in the opening 8 and faces the first plate 6a, and the second upper plate surface 60b and the second side plate surface 62b form a third included angle 63b, and the second lower plate surface 61b and the second side plate surface 62b form a fourth included angle 64b.

[0040] It is understood that when the tab 4b passes through the opening 8, the tab 4b near the first plate 6a contacts the position where the first included angle 63a is located and the position where the second included angle 64a is located, and it is easier to rub against the position where the first included angle 63a is located and the position where the second included angle 64a is located. When the position of the first included angle 63a and the position of the second included angle 64a are rectangular structures, it is easier to tear the tab 4b. Therefore, with reference to Fig. 6 as an example of the present embodiment, the first included angle 63a is rounded, and the second included angle 64a is also rounded to prevent the tab 4b from being torn by the first plate 6a when it passes through the opening 8.

[0041] When the tab 4b passes through the opening 8, the tab 4b near the second plate 6b naturally contacts the position of the third included angle 63b and the position of the fourth included angle 64b, and it is easier to rub against the position of the third included angle 63b and the position of the fourth included angle 64b. Therefore, referring to Fig. 6 In this example, the third included angle 63b and the fourth included angle 64b are also rounded to prevent the tab 4b from being torn by the second plate 6b when it passes through the opening 8.

[0042] It should be noted that in some batteries 100, when the tab 4b passes through the opening 8, the tab 4b only touches one of the first included angle 63a, the second included angle 64a, the third included angle 63b, and the fourth included angle 64b. Therefore, in these batteries 100, only one of the first included angle 63a, the second included angle 64a, the third included angle 63b, and the fourth included angle 64b needs to be rounded to prevent the tab 4b from being torn when passing through the opening 8.

[0043] It should be understood that if the ratio of the first inclination angle α1, the inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b based on formula (1) is too large, the opening 8 becomes correspondingly smaller, making it more difficult for the tab 4b to pass through the opening 8. Since one of the first included angle 63a, the second included angle 64a, the third included angle 63b, and the fourth included angle 64b has a rounded configuration, the difficulty of the tab 4b passing through the opening 8 can be reduced. Therefore, in this example, the ratio of the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b can still satisfy: 0.8°≤(α1+α2)×mb≤680°

[0044] In this way, the battery structure 100 of this example can also realize the following: the inclination angles of the first plate 6a and the second plate 6b can be adjusted to the specifications of the tab 4b, and there can be an appropriate space between the first plate 6a, the second plate 6b, and the cover plate 3 to accommodate the tab 4b passing through the opening 8, thereby ensuring that the support frame 6 can achieve a good convergence effect to ensure the guiding action of the support frame 6 on the tab 4b. And through the fit between the first inclination angle α1, the second inclination angle α2, the width “b” of the opening 8, and the thickness “m” of the tab 4b, the dimension of the opening 8 can be adjusted to the specifications of the tab 4b, and the tab 4b can pass through the support frame 6 more easily.

[0045] For example, the ratio of the first inclination angle α1, the second inclination angle α2, the width “b” of the opening 8 and the thickness “m” of the tab 4b may be one of 0.8°, 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 200°, 300°, 400°, 500°, 600° and 680° based on the formula (2).

[0046] It should be noted that the tab 4b and the opening 8 not only cooperate with each other in the third direction "Z," but also have a cooperative relationship in the second direction "Y." The length L1 of the opening 8 in the second direction "Y" is typically larger than the length L2 of the tab 4b in the second direction "Y" to ensure that the tab 4b can pass through the opening 8. Of course, if the length L1 of the opening 8 in the second direction "Y" deviates too much from the length L2 of the tab 4b in the second direction "Y," this may also result in the tab 4b not cooperating well with the cell 4 and the support frame 6. For example, the structural strength of the holding frame 6 is insufficient, which may cause the holding frame 6 to deform and the tab 4b to overlap with the housing 1, resulting in insulation failure or causing the battery 100 to have insufficient overcurrent capacity.Therefore, the lengths of the two elements in the second direction "Y" are usually also within a suitable range. For example, in the present embodiment, the length of the opening 8 in the second direction "Y" is L1, and the length of the tab 4b in the second direction "Y" is L2, and the two satisfy the requirements. 0.13≤L2L1≤0.95. For example, the ratio of L1 to L2 can be selected from 0.13, 0.15, 0.18, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9 and 0.95.

[0047] It should be noted that the length L1 of the opening 8 in the second direction "Y" will affect the structural strength of the support frame 6. If the length L1 of the opening 8 in the second direction "Y" is too large, it is likely to result in insufficient structural strength of the support frame 6. If the length L1 of the opening 8 in the second direction "Y" is too small, it is likely to result in difficulty in passing the tab 4b through the opening 8. Therefore, under the above-mentioned ratio restriction, as an example of the present embodiment, the length L1 of the opening 8 in the second direction "Y" can be in the range of 22 to 160 mm to control the length L1 of the opening 8 in the second direction "Y" within an appropriate range, so that the support frame 6 and the tab 4b can be matched with each other.

[0048] For example, the length L1 of the opening 8 in the second direction “Y” can be selected from one of the dimensions of 22 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm and 160 mm.

[0049] It should be noted that the length L2 of the tab 4b in the second direction "Y" will affect the performance of the tab 4b. If the length L2 of the tab 4b in the second direction "Y" is too long, it may easily cause the tab 4b to be difficult to pass through the opening 8. If the length L2 of the tab 4b in the second direction "Y" is too short, it may easily cause the overcurrent capacity of the tab 4b to be insufficient. Therefore, under the above-mentioned ratio restriction, as an example of the present embodiment, the length L2 of the tab 4b in the second direction "Y" can be in the range of 20 to 80 mm, so that the tab 4b can be adapted to the support frame 6 and the overcurrent capacity of the tab 4b is sufficient to adapt to batteries 100 of different specifications.

[0050] For example, the length L2 of the tab 4b in the second direction “Y” can be selected from one of 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm and 80 mm.

[0051] The holding frame 6 is arranged between the cell body 4a and the cover plate 3 and is adapted to the cell body 4a and the cover plate 3 to engage and position the tab 4b. The holding frame 6, which has the first plate 6a and the second plate 6b, has a variety of possible implementations. Referring to the Fig. 7-10, as an example of the present embodiment, the holding frame 6 includes a holding frame body 6c and two partition walls 6d, wherein a cavity is disposed in the holding frame body 6c, and the top of the cavity has a cavity opening connected to the outside; two partition walls 6d are disposed in the cavity, and the two partition walls 6d are arranged at intervals to divide the cavity into a first cavity 6e, a second cavity 6f, and a third cavity 6g, and the second cavity 6f and the third cavity 6g are respectively disposed on both sides of the first cavity 6e in the second direction "Y".

[0052] The first plate 6a and the second plate 6b are arranged in the first cavity 6e and form the bottom of the first cavity 6e, so that the opening 8 is connected to the first cavity 6e. In this way, the tab 4b can enter the first cavity 6e through the opening 8, and after the support frame 6 is provided between the cell body 4a and the cover plate 3, the connection terminal 7 of the cover plate 3 can also enter the first cavity 6e through the cavity, so that the tab 4b extending through the opening 8 can be electrically connected to the connection terminal 7.

[0053] The second cavity 6f may be arranged opposite the liquid injection port 9 or the explosion-proof valve of the battery 100, and the first cavity 6e and the second cavity 6f are divided by the partition wall 6d, whereby the influence of peeling or injection on the tab 4b can be avoided and the structural strength of the holding frame 6 can also be improved. For example, referring to Fig. 2 and Fig. 7, the second cavity 6f is disposed opposite the liquid injection hole 9 of the battery 100. The third cavity 6g is used to limit the distance between the tab 4b and the housing 1, so that the tab 4b is kept at a certain distance from the housing 1 in the second direction "Y", thereby preventing the tab 4b from overlapping the housing 1 and preventing a short circuit.

[0054] It is understood that if the ratio of the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b based on formula (1) is too small, this is not conducive to the convergence of the tab 4b. In cooperation with the above-mentioned support frame structure 6, the tab 4b can be more effectively converged in the first cavity 6e, thereby reducing the difficulty of converging the tab 4b. Therefore, the relationship between the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b can continue to satisfy: 0.6°≤(α1+α2)×mb≤660°

[0055] In this way, the structure of the battery 100 of this example can also be realized: the inclination angle of the first plate 6a and the second plate 6b can be adjusted to the specifications of the tab 4b, and a suitable space can be provided between the first plate 6a, the second plate 6b, and the cover plate 3 to accommodate the tab 4b passing through the opening 8. This can ensure that the support frame 6 can achieve a good convergence effect to ensure the guiding effect of the support frame 6 on the tab 4b. Furthermore, by matching the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b, the dimension of the opening 8 can be adjusted to the specifications of the tab 4b, and the tab 4b can pass through the support frame 6 more easily.

[0056] For example, the ratio of the first inclination angle α1, the second inclination angle α2, the width “b” of the opening 8 and the thickness “m” of the tab 4b may be one of 0.6°, 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 200°, 300°, 400°, 500°, 600° and 660° based on the formula (3).

[0057] In order to facilitate the tab 4b to pass through the opening 8 in a part of the structure of the battery 100, referring to Fig. 11, as an example of the present embodiment, the outside of the tab 4b, i.e., the outer surface of the tab 4b, can be connected to a guide member, such as an adhesive tape. The tape has an insulating effect and can prevent the tab 4b from being inserted upside down and causing insulation failure. The guide member has a certain flexibility, and the surface friction coefficient of the guide member is smaller than the surface friction coefficient of the tab 4b, so that the guide member can have a smoother surface than the tab 4b. By pulling the guide member, the tab 4b can be driven to pass more smoothly through the opening 8.

[0058] In addition, in a part of the structure of the battery 100, referring to Fig.8, as an example of the present embodiment, a pre-welded weld 11 is arranged on the tab 4b. By welding the tabs 4b together through the weld 11, the tabs 4b can be better grasped and the tabs 4b can be guided through the opening 8. Of course, with the pre-welded weld 11, the weld 11 is arranged on the tab 4b in a specific area to ensure the effect of the pre-weld. As an example of the present embodiment, for example, the length of the weld 11 is L3, and the width of the tab 4b is L2, and both satisfy: 0.4≤L3L2≤0.9. For example, the length L3 of the weld 11 is in the range of 25 to 70 mm; for example, it can be selected from one of the dimensions 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, and 70 mm. The ratio of L3 to L2 can be selected from one of the values ​​0.4, 0.5, 0.6, 0.7, 0.8, and 0.9.

[0059] Based on the above battery 100, the present embodiment also provides a power battery system including a bus bar and at least two of the above-described batteries 100. The bus bar is electrically connected to the terminals 7 of the two batteries 100. Since the present power battery system includes any of the above-mentioned batteries 100, it also has the advantages of the above-mentioned batteries 100.

[0060] In summary, the present embodiment of the application provides a battery 100 and a power battery system. By adjusting the value of the first inclination angle α1, the value of the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b, the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b can be mutually adjusted. In this way, the inclination angles of the first plate 6a and the second plate 6b can be adjusted to the specifications of the tab 4b, and a suitable space can be provided between the first plate 6a, the second plate 6b, and the cover plate 3 to accommodate the tab 4b passing through the opening 8. This can ensure that the holding frame 6 can achieve a good convergence effect in order to ensure the guiding effect of the holding frame 6 on the tab 4b.In addition, by matching the first inclination angle α1, the second inclination angle α2, the width "b" of the opening 8, and the thickness "m" of the tab 4b, the dimension of the opening 8 can be adapted to the specifications of the tab 4b, and the tab 4b can pass more easily through the support frame 6. This can prevent the small opening 8 from reducing the passing efficiency of the tab 4b, thereby improving the overall assembly yield of the battery (100).

[0061] The foregoing is merely a description of preferred embodiments of the present utility model. It should be noted that those skilled in the art may make various improvements and substitutions without departing from the technical principle of the present utility model, and these improvements and substitutions should also be considered within the scope of the present utility model.

Claims

[1] Battery, comprising: a housing having a first end in a longitudinal direction; a cover plate disposed at least at the first end of the housing; a cell disposed in the housing, the cell having a cell body and a tab connected to the cell body; an insulating element arranged between the cover plate and the cell; a support frame arranged between the cell body and the cover plate, the support frame having an opening facing the cover plate so that the tab passes through the opening, and the support frame having a first plate and a second plate arranged at intervals with respect to the opening, wherein the first plate extends to the second plate and extends to the cover plate and the first plate is inclined to the longitudinal direction, and a first inclination angle α1 is formed between an extending direction of the first plate and the longitudinal direction; the second plate extends to the first plate and extends to the cover plate and the second plate is inclined to the longitudinal direction, and a second inclination angle α2 is formed between an extension direction of the second plate and the longitudinal direction; and the width of the opening is “b”, the thickness of the tab is “m” and the above parameters are met: 0.6°≤(α1+α2)×mb≤680°. [2] Battery according to claim 1, characterized by that the first inclination angle α1 is in the range of 15°~88°; the second inclination angle α2 is in the range of 15°~88°. [3] Battery according to claim 1 or 2, characterized bythat the first inclination angle α1 and the second inclination angle α2 satisfy: 0.5≤α1α2≤2. [4] Battery according to one of the preceding claims, characterized by that the thickness “m” of the tab is in the range of 0.2 to 4 mm. [5] Battery according to one of the preceding claims, characterized by that the width “b” of the opening is in the range of 1 to 12 mm. [6] Battery according to one of the preceding claims, characterized by that the first plate is arranged below the terminal post, and a first receiving space is formed between the first plate and the terminal post; and the second plate is arranged below the terminal post and a second receiving space is formed between the second plate and the terminal post; and the tab passes through the opening and extends into the first receiving space and / or the second receiving space. [7] Battery according to one of the preceding claims, characterized bythat the first plate has a first upper plate surface and a first lower plate surface arranged at intervals in the longitudinal direction, a first side plate surface is connected between the first upper plate surface and the first lower plate surface, the first side plate surface is located in the opening and faces the second plate, and the first upper plate surface and the first side plate surface form a first included angle, and the first lower plate surface and the first side plate surface form a second included angle, and the first included angle and / or the second included angle are rounded;and / or the second plate has a second upper plate surface and a second lower plate surface arranged at intervals in the longitudinal direction, a second side plate surface is connected between the second upper plate surface and the second lower plate surface, the second side plate surface is located in the opening and faces the first plate, and the second upper plate surface and the second side plate surface form a third included angle, and the second lower plate surface and the second side plate surface form a fourth included angle, and the third included angle and / or the fourth included angle are rounded.; [8] Battery according to claim 7, characterized by that the first angle of inclination α1, the second angle of inclination α2, the width “b” of the opening and the thickness “m” of the tab satisfy: 0.8°≤(α1+α2)×mb≤680°. [9] Battery according to one of the preceding claims, characterized by that the length of the opening in the second direction is L1, the length of the tab in the second direction is L2, and both satisfy: 0.13≤L2L1≤0.

95. [10] Battery according to claim 9, characterized by that the length L1 of the opening in the second direction is in the range of 22 to 160 mm, and the length L2 of the tab in the second direction is in the range of 20 to 80 mm. [11] Battery according to one of the preceding claims, characterized by that the support frame has: a frame body, wherein a cavity is arranged in the frame body and the top of the cavity has a cavity opening connected to the outside; at least one partition wall, wherein the partition wall is arranged in the cavity, and the two partition walls are arranged at intervals, whereby the cavity is divided into at least a first cavity and a second cavity, and the first plate and the second plate are arranged in the first cavity and form the bottom of the first cavity, so that the opening is connected to the first cavity; wherein the second cavity is arranged opposite a liquid injection opening and / or an explosion-proof valve of the battery. [12] Battery according to claim 11, characterized by that the first angle of inclination α1, the second angle of inclination α2, the width “b” of the opening and the thickness “m” of the tab satisfy: 0.6°≤(α1+α2)×mb≤660°. [13] Battery according to one of the preceding claims, characterized by that a guide element is connected to the outside of the tab. [14] Battery according to one of the preceding claims, characterized by that a pre-welded welding point is arranged on the tab. [15] Power battery system, characterized by that it comprises a busbar and at least two batteries according to one of the preceding claims, wherein the busbar is electrically connected to the terminals of the two batteries.

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