Battery and power battery system
By adjusting the structural proportions of the cage, the compatibility between the tabs and the cage is ensured, solving the problems of low assembly efficiency and misalignment of the tab structure in the prior art, and achieving efficient battery assembly and improved safety.
Patent Information
- Application Number
- CN202520275351.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-20
AI Technical Summary
The current battery has a low compatibility between the cage and the tab structure, resulting in low assembly efficiency. The tabs are prone to tearing and shifting, which affects the battery's overcurrent capacity and short-circuit risk.
By adjusting the structural proportions of the cage, the matching of the first tilt angle α1, the second tilt angle α2, the opening width b, and the electrode thickness m is ensured. The tilt angles of the first and second plates are designed to match the electrode specifications, providing suitable space to accommodate the electrode and ensuring good convergence and guiding effect.
It improves the assembly efficiency of the tabs and cage, prevents tab misalignment and tearing, reduces the risk of battery short circuit, and ensures the overall assembly yield and overcurrent capacity of the battery.
Smart Images
Figure CN223612456U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power battery technical field especially relates to a kind of battery and power battery system. BACKGROUND
[0002] Power battery is a battery for providing power source for tool, which generally includes metal shell, electric core arranged in metal shell and cover plate assembly fixed to the top of metal shell. The electric core usually has a tab structure, which is a metal conductor for leading positive and negative poles out of the electric core, and is the contact point of the positive and negative poles of the electric core during charging and discharging.
[0003] At present, the battery generally sets a retainer in the metal shell to contain and position the tab structure. However, the matching of the existing retainer and the tab structure is poor, and it is difficult for part of the tab structure to pass through the existing retainer, which affects the assembly efficiency of the tab structure and the retainer. This not only affects the overall assembly yield of the battery, but also easily causes the tab structure to tear, thereby affecting the overcurrent capacity of the tab, and secondly, the existing retainer has poor guiding effect on part of the tab structure, and the tab structure is difficult to contain in the retainer and is easy to deviate, resulting in the tab and the shell of the battery being overlapped, causing the battery to short circuit. SUMMARY
[0004] The purpose of the utility model is to provide a battery and a power battery system, by adjusting the structure ratio of the retainer, the structure of the structure frame is coordinated, to solve the problem of low matching of the tab structure and the retainer.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A battery comprises:
[0007] A shell having a first end and a second end arranged opposite in the length direction;
[0008] A cover plate mounted at least to the first end of the shell and provided with a pole;
[0009] An electric core arranged in the shell, and the electric core comprises an electric core body and a tab connected to the electric core body;
[0010] An insulating piece arranged between the cover plate and the electric core;
[0011] A retainer arranged between the electric core body and the cover plate and having an opening towards the cover plate, so that the tab passes through the opening and is electrically connected to the pole, and the retainer has a first plate and a second plate arranged in a spaced manner relative to the opening, wherein
[0012] The first plate extends towards the second plate and the cover plate, and the first plate is inclined to the length direction, and a first inclination angle a1 is formed between the extending direction of the first plate and the length direction;
[0013] The second plate extends towards the first plate and the cover plate, and the second plate is inclined to the length direction, and a second inclination angle a2 is formed between the extending direction of the second plate and the length direction; and,
[0014] The width of the opening is b, the thickness of the tab is m, and the above parameters satisfy:
[0015]
[0016] Based on the above battery, the application further provides a power battery system, which comprises a conductive row and at least two batteries of any one of the above.
[0017] Compared with the prior art, the battery and the power battery system of the application have the beneficial effects that:
[0018] The battery and the power battery system of the application can match the first inclination angle a1, the second inclination angle a2, the width b of the opening and the thickness m of the tab with each other, so that the inclination angles of the first plate and the second plate can be matched with the specifications of the tab, the first plate and the second plate can have a suitable space to the cover plate to accommodate the tab passing through the opening, the retainer can realize a good convergence effect to ensure the guiding effect of the retainer on the tab, and the size of the opening can be matched with the specifications of the tab by matching the first inclination angle a1, the second inclination angle a2, the width b of the opening and the thickness m of the tab with each other, so that the tab can pass through the retainer more easily, the efficiency of the tab passing through is not affected due to the small opening, and the overall assembly yield of the battery is not affected. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a schematic diagram of the battery in the embodiment of the application;
[0020] Figure 2 is Figure 1 is an enlarged view of A in
[0021] Figure 3 is a schematic diagram of the shell in the embodiment of the application;
[0022] Figure 4 is a cross-sectional schematic diagram of the battery in the embodiment of the application;
[0023] Figure 5 is Figure 4 is an enlarged view of B in FIG. 1C;
[0024] Figure 6 is Figure 5 is an enlarged view of C in FIG. 1C;
[0025] Figure 7 is a schematic view of the retainer in the embodiment of the present application;
[0026] Figure 8 is Figure 7 is an enlarged view of D in FIG. 1C;
[0027] Figure 9 is another angle schematic view of the retainer in the embodiment of the present application;
[0028] Figure 10 is Figure 9 is an enlarged view of E in FIG. 1C;
[0029] Figure 11 is a schematic view of the cooperation of the guide, the welding mark and the tab in the embodiment of the present application.
[0030] In the figure, 100, battery; X, first direction; Y, second direction; Z, third direction; 1, shell; 1a, first end; 1b, second end; 2, opening; 3, cover plate; 4, electric core; 4a, electric core body; 4b, tab; 5, insulating piece; 6, retainer; 6a, first plate; 60a, first upper plate face; 61a, first lower plate face; 62a, first side plate face; 63a, first included angle; 64a, second included angle; 6b, second plate; 60b, second upper plate face; 61b, second lower plate face; 62b, second side plate face; 63b, third included angle; 64b, fourth included angle; 6c, retainer body; 6d, partition plate; 6e, first cavity; 6f, second cavity; 6g, third cavity; 6h, first containing space; 6i, second containing space; 7, pole; 8, opening; 9, liquid injection hole; 10, guide; 11, welding mark. DETAILED DESCRIPTION
[0031] The specific implementation of the present application is described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.
[0032] In the description of the utility model, it should be understood that when the element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to another element or indirectly connected to the other element. The terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0033] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "height", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like in the utility model are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a specific orientation, structure and operation, therefore it cannot be understood as a limitation on the utility model.
[0034] In the description of the utility model, it should be understood that the terms "first", "second" in the utility model are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features.
[0035] Embodiment
[0036] Reference Figures 1-11 The battery 100 provided by the embodiment of the application comprises a shell 1, wherein the outer contour of the shell 1 is a columnar structure of a cuboid, the inside of the shell 1 is an installation space for assembling the battery 100. Both ends of the shell 1 are open 2, so that the inside of the shell 1 is in communication with the outside space. The shell 1 is usually used for packaging components such as battery cells and electrolytes. In different battery structures, the shell 1 can be various shapes and various sizes, for example, cuboid, cylinder, hexagonal prism, etc. Of course, the shape of the shell 1 can also be determined according to the specific shape and size of the battery cell. And the material of the shell 1 can be various, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.
[0037] In the embodiment, the shell 1 has a first direction X, a second direction Y and a third direction Z perpendicular to each other, wherein the direction in which the two openings 2 of the shell 1 are located is the first direction X of the battery 100, i.e. the length direction, and one end where one opening 2 is located is the first end la of the shell 1, and the other end where the other opening 2 is located is the second end lb of the shell 1; the direction in which the long side of the opening 2 is located is the second direction Y of the battery 100, i.e. the width direction, and the direction in which the short side of the opening 2 is located is the third direction Z of the battery 100, i.e. the thickness direction.
[0038] With reference to Figures 1-7 The battery 100 of the embodiment includes a shell 1, a cover plate 3, an electric core 4, an insulating piece 5 and a retaining frame 6, wherein the shell 1 has a first end la and a second end lb oppositely arranged in the length direction; the cover plate 3 is mounted to the first end la of the shell 1 and arranged to extend in the second direction Y, and the cover plate 3 is provided with a pole 7 extending to the inside of the shell 1; the electric core 4 is arranged in the shell 1, and the electric core 4 includes an electric core body 4a and a tab 4b connected to the electric core body 4a; the insulating piece 5 is arranged between the cover plate 3 and the electric core 4 and around the pole 7 to form an electrical isolation structure between the shell 1 and the pole 7.
[0039] It should be noted that the cover plate 3 refers to a component that covers the opening 2 of the shell 1 to isolate the accommodation space inside the shell 1 from the external environment. The shape of the cover plate 3 can be adapted to the shape of the shell 1 to achieve isolation in cooperation with the shell 1. The cover plate 3 can be made of a material with certain hardness and strength, such as aluminum alloy.
[0040] It should be noted that the electric core 4 includes an isolation film and two kinds of polar plates with opposite polarities, i.e. positive and negative polar plates, and the electric core 4 works by moving metal ions between the positive and negative polar plates. The cycle process of the electric core 4 is the process of moving metal ions from the positive polar plate to the negative polar plate and then from the negative polar plate to the positive polar plate. The tab 4b is a component of the electric core 4, and the tab 4b electrically connected to the polar plate usually includes a positive tab and a negative tab, wherein the positive tab is electrically connected to the positive polar plate, and the negative tab is electrically connected to the negative polar plate, and the electric core 4 realizes charging and discharging through the positive and negative tabs.
[0041] It should be noted that the polar plate includes a current collector and an active material layer, and the active material layer is coated on the surface of the current collector. If the polar plate is a positive polar plate, the material of the current collector can be aluminum, and the material of the active material layer can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. If the polar plate is a negative polar plate, the material of the current collector can be copper, and the material of the active material layer can be carbon or silicon, etc.
[0042] It should be noted that the retaining frame 6 can be used to isolate the electrically connected components in the shell 1 from the cover plate 3 to reduce the risk of short circuit. For example, the material of the retaining frame 6 can be plastic, rubber, etc.
[0043] The retainer 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 with the pole 7. The retainer 6 has a first plate 6a and a second plate 6b arranged in a spaced manner relative to the opening 8, wherein the first plate 6a extends towards the second plate 6b and extends towards the cover plate 3, and the first plate 6a is inclined to the length direction, and a first inclination angle a1 is formed between the extension direction of the first plate 6a and the length direction of the shell 1; the second plate 6b extends towards the first plate 6a and extends towards the cover plate 3, and the second plate 6b is inclined to the length direction, and a second inclination angle a2 is formed between the second plate 6b and the length direction of the shell 1; and the width of the opening 8 is b, the thickness of the tab 4b is m, and the above parameters satisfy:
[0044]
[0045] It should be noted that in formula (1), the numerical value units of the first inclination angle a1 and the second inclination angle a2 are degrees (°), the numerical value unit of the width b of the opening 8 is millimeter, and the numerical value unit of the thickness m of the tab 4b is millimeter.
[0046] For example, the ratio of the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b based on formula (1) can be one of 0.6°, 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 200°, 300°, 400°, 500°, 600°, 680°.
[0047] It should be noted that the first inclination angle a1 of the present embodiment refers to the acute angle formed between the extension direction of the first plate 6a and the length direction, and correspondingly, the second inclination angle a2 refers to the acute angle formed between the extension direction of the second plate 6b and the length direction.
[0048] 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 towards the side where the second plate 6b is located and the end of the second plate 6b towards the side where the first plate 6a is located in the third direction Z.
[0049] It can be understood that the length of the tab 4b is generally greater than the distance between the cell body 4a and the cover plate 3, so there is a certain space between the holder 6 and the pole 7 to accommodate the tab 4b, so that the tab 4b can be placed inside the space of the holder 6 after passing through the opening 8 to bundle the tab 4b. Therefore, the ratio of the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b based on formula (1) reflects the cooperation between the holder 6 and the tab 4b. If the ratio of the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b based on formula (1) is too small, the volume of the space between the holder 6 and the pole 7 will also be too small, which is not conducive to the bundling of the tab 4b, resulting in poor guiding effect of the holder 6 on the tab 4b, making the tab 4b easy to deviate, causing the tab 4b to lap with the shell 1, thereby causing insulation failure and the risk of battery short circuit; if the ratio of the first inclination angle a1, the second inclination angle a2, 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 will correspondingly become smaller, resulting in increased difficulty in passing the tab 4b through the opening 8, affecting the efficiency of the tab 4b passing through, and further affecting the overall assembly yield of the battery 100, and this also easily causes the tab 4b to tear, affecting the overcurrent capacity of the tab 4b.
[0050] Therefore, the battery 100 of the present embodiment adjusts the angle of the first inclination angle a1, the angle of the second inclination angle a2, the size of the width b of the opening 8, and the size of the thickness m of the tab 4b, so that the ratio of the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b based on formula (1) is controlled within the range of 0.6°-680°, thereby enabling the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b to match each other. In this way, the inclination angles of the first plate 6a and the second plate 6b can match the specifications of the tab 4b, and the first plate 6a, the second plate 6b, and the cover plate 3 can have a suitable space to accommodate the tab 4b passing through the opening 8, ensuring that the holder 6 can achieve good bundling effect to ensure the guiding effect of the holder 6 on the tab 4b, avoid the tab 4b from deviating, prevent the tab 4b from lapping with the shell 1, and further prevent battery short circuit. Moreover, by matching the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b, the size of the opening 8 can be adapted to the specifications of the tab 4b, the tab 4b can pass through the holder 6 more easily, improve the assembly efficiency of the tab structure and the holder 6, ensure the overall assembly yield of the battery, and prevent the tab 4b from tearing, ensuring the overcurrent capacity of the tab 4b.
[0051] It can be understood that the internal structure of the battery 100 of different specifications will be different, which will usually cause the distance between the retainer 6 and the pole 7 to change, thereby affecting the arrangement angle of the first plate 6a and the second plate 6b, so the angle of the first inclination angle α1 and the angle of the second inclination angle α2 are usually within a suitable range to meet the assembly requirements of the battery 100 of different specifications. For example, as an example of the present embodiment, the first inclination angle α1 can be within the range of 15°-88° to ensure the cooperation degree of the tab 4b and the retainer 6, so that the retainer 6 can meet the guiding requirement of the tab 4b, and the tab 4b can easily pass through the opening 8 of the retainer 6. The first inclination angle α1 with an angle value greater than this range has the problem of excessive angle, which can easily cause the tab 4b to be difficult to pass through the retainer 6, and the first inclination angle α1 with an angle value less than this range has the problem of insufficient angle, which can easily cause the guiding effect of the retainer 6 to be insufficient, and the cooperation between the tab 4b and the retainer 6 to be poor.
[0052] Of course, the cooperation degree between the tab 4b and the retainer 6 can also be adjusted by adjusting the angle of the second inclination angle α2, for example, the second inclination angle α2 can be within the range of 15°-88°. The second inclination angle α2 with an angle value within this range can also enable the retainer 6 to meet the guiding requirement of the tab 4b, and enable the tab 4b to easily pass through the opening 8 of the retainer 6.
[0053] For example, the first inclination angle α1 can be selected from one of 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 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, and 88°.
[0054] Of course, the angle of the first inclination angle α1 and the angle of the second inclination angle α2 within the aforementioned range can cause the angle of the first inclination angle α1 and the angle of the second inclination angle α2 to have a significant difference, which can affect the structural strength of the retainer 6. Therefore, the angle of the first inclination angle α1 and the angle of the second inclination angle α2 are usually close to each other in the same battery 100, for example, as an example of the present embodiment, the first inclination angle α1 and the second inclination angle α2 satisfy: In this way, it can be ensured that the first plate 6a and the second plate 6b extend symmetrically, the structural strength of the retainer 6 is better, and it can be ensured that the tab 4b contacts the first plate 6a and the second plate 6b at substantially the same time during the process of the tab 4b passing through the opening 8, thereby avoiding that the first plate 6a and the second plate 6b contact the tab 4b successively, causing double interception to the tab 4b, and affecting the efficiency of the tab 4b passing through the opening 8. For example, The ratio of the first inclination angle a1 to the second inclination angle a2 can be 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.
[0055] It should be noted that the angles of the first inclination angle a1 and the second inclination angle a2 satisfy the above ratio relationship, and it is not required that the extension lengths of the first plate 6a and the second plate 6b are the same. According to the space planning inside the battery 100, the first plate 6a and the second plate 6b can adopt a structure configuration in which one has a greater extension length than the other, which can also provide more space for the tab 4b to be bundled.
[0056] It can be understood that different specifications of the battery 100 also have different requirements for the thickness m of the tab 4b and the width b of the opening 8. For example, if the thickness m of the tab 4b is too large, it will increase the difficulty of the tab 4b passing through the opening 8, and 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 within a suitable range to meet the assembly requirements of different specifications of the battery 100. For example, as an example of the present embodiment, the thickness m of the tab 4b is within the range of 0.2-4 mm. The tab 4b with a thickness m within this range can easily pass through the opening 8 of the retainer 6 and ensure that the overcurrent capacity of the tab 4b can meet the requirements of the battery 100.
[0057] For example, the thickness m of the tab 4b can be 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, 4 mm. It should be noted that the tab 4b usually has multiple layers of metal sheets and multiple layers of insulating sheets, and the thickness m of the tab 4b is the total thickness of the tab 4b, which is the sum of the product of the single-layer thickness of the metal sheet and the number of layers of the metal sheet, and the product of the single-layer thickness of the insulating sheet and the number of layers of the insulating sheet.
[0058] Of course, the width b of the opening 8 is also usually within a suitable range to meet the assembly requirements of different specifications of the battery 100. For example, as an example of the present embodiment, the width b of the opening 8 is within the range of 1-12 mm, so that the opening 8 can be adapted to the specifications of the tab 4b, ensuring that the tab 4b can pass through the retainer 6 more easily, improving the assembly efficiency of the tab structure and the retainer 6, ensuring the overall assembly yield of the battery, and preventing the tab 4b from tearing, ensuring the overcurrent capacity of the tab 4b.
[0059] For example, the width b of the opening 8 can be selected as one of 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.
[0060] The tab 4b is usually connected to the end of the core body 4a, so that the tab 4b enters the space between the holder 6 and the post 7 after passing through the opening 8. Since the length of the tab 4b is usually greater than the distance between the holder 6 and the post 7, the tab 4b needs to be bunched between the holder 6 and the post 7 after entering the space between the holder 6 and the post 7, so that the tab 4b electrically connected to the post 7 does not touch other electrical elements. Figure 5 As an example of the present embodiment, the first plate 6a is located below the post 7, and a first accommodating space 6h is formed between the first plate 6a and the post 7; and the second plate 6b is located below the post 7, and a second accommodating space 6i is formed between the second plate 6b and the post 7. The tab 4b passes through the opening 8 and extends into the second accommodating space 6i, and is bunched in the second accommodating space 6i. As a result, due to the inclined arrangement of the second plate 6b, the tab 4b is constrained by the second plate 6b, so that the tab 4b is not easy to deviate from the second accommodating space 6i, thereby ensuring the bunching and positioning effect of the tab 4b.
[0061] Of course, in other battery 100 structures, the tab 4b can also extend into the first accommodating space 6h after passing through the opening 8 and be bunched in the first accommodating space 6h, which can also achieve the same bunching effect. Alternatively, in other battery 100 structures, the tab 4b can extend into the first accommodating space 6h and the second accommodating space 6i after passing through the opening 8, and be bunched in the first accommodating space 6h and the second accommodating space 6i, thereby achieving the same bunching effect.
[0062] Referring to Figure 6The first plate 6a and the second plate 6b of the present embodiment are in a plate-like configuration, wherein the first plate 6a includes a first upper plate face 60a and a first lower plate face 61a arranged at intervals in the length direction, a first side plate face 62a is connected between the first upper plate face 60a and the first lower plate face 61a, the first side plate face 62a is located within the opening 8 and faces the second plate 6b, and a first included angle 63a is formed between the first upper plate face 60a and the first side plate face 62a, and a second included angle 64a is formed between the first lower plate face 61a and the first side plate face 62a. Also, the second plate 6b includes a second upper plate face 60b and a second lower plate face 61b arranged at intervals in the length direction, a second side plate face 62b is connected between the second upper plate face 60b and the second lower plate face 61b, the second side plate face 62b is located within the opening 8 and faces the first plate 6a, and a third included angle 63b is formed between the second upper plate face 60b and the second side plate face 62b, and a fourth included angle 64b is formed between the second lower plate face 61b and the second side plate face 62b.
[0063] It can be understood that when the tab 4b passes through the opening 8, the tab 4b close to the first plate 6a will contact and more easily rub against the positions of the first included angle 63a and the second included angle 64a. If the positions of the first included angle 63a and the second included angle 64a are right-angled structures, the tab 4b is more likely to be torn, so it is preferable that Figure 6 As an example of the present embodiment, the first included angle 63a is a rounded angle, and the second included angle 64a is also a rounded angle, so as to avoid the tab 4b being torn by the first plate 6a when passing through the opening 8.
[0064] Of course, when the tab 4b passes through the opening 8, the tab 4b close to the second plate 6b will contact and more easily rub against the positions of the third included angle 63b and the fourth included angle 64b. So it is preferable that Figure 6 In this example, the third included angle 63b and the fourth included angle 64b are also rounded angles, so as to avoid the tab 4b being torn by the second plate 6b when passing through the opening 8.
[0065] It should be noted that in some batteries 100, when the tab 4b passes through the opening 8, the tab 4b only contacts one of the first included angle 63a, the second included angle 64a, the third included angle 63b, and the fourth included angle 64b, so 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 a rounded angle, so as to avoid the tab 4b being torn when passing through the opening 8.
[0066] It can be 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 is too large based on formula (1), the opening 8 will correspondingly become smaller, resulting in an increase in the difficulty of the tab 4b passing through the opening 8. However, due to the configuration that one of the first included angle 63a, the second included angle 64a, the third included angle 63b, and the fourth included angle 64b is a rounded corner, the difficulty of the tab 4b passing through the opening 8 is 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 also satisfy:
[0067]
[0068] In this way, the battery 100 structure of this example can also be implemented: the inclination angles of the first plate 6a and the second plate 6b can be matched with the specifications of the tab 4b, and the first plate 6a, the second plate 6b, and the cover plate 3 can have appropriate spaces therebetween to accommodate the tab 4b passing through the opening 8, ensuring that the retainer 6 can achieve good convergence effect to ensure the guiding effect of the retainer 6 on the tab 4b. Moreover, 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 with each other, the size of the opening 8 can be adapted to the specifications of the tab 4b, and the tab 4b can more easily pass through the retainer 6.
[0069] 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 based on formula (2) can be one of 0.8°, 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 200°, 300°, 400°, 500°, 600°, and 680°.
[0070] It should be noted that in addition to cooperating with each other in the third direction Z, the tab 4b and the opening 8 also have a cooperation relationship in the second direction Y. The length L1 of the opening 8 in the second direction Y is usually greater than the length L2 of the tab 4b in the second direction Y, so as 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 and the length L2 of the tab 4b in the second direction Y differ too much, the tab 4b and the battery cell 4 and the retainer 6 will not cooperate well, for example, the structure of the retainer 6 is not strong enough, resulting in deformation of the retainer 6, which in turn causes the tab 4b to be connected to the shell 1, causing insulation failure, or the overcurrent capacity of the battery 100 is insufficient. Therefore, the lengths of the opening 8 and the tab 4b in the second direction Y are usually within a suitable range, for example, as an example of the present embodiment, the length of the opening 8 in the second direction Y is L1, the length of the tab 4b in the second direction Y is L2, and they satisfy: For example, the ratio of L1 to L2 can be selected from one of 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, 0.95.
[0071] It should be noted that the length L1 of the opening 8 in the second direction Y affects the structural strength of the retainer 6. If the length L1 of the opening 8 in the second direction Y is too large, it can easily lead to insufficient structural strength of the retainer 6. If the length L1 of the opening 8 in the second direction Y is too small, it can easily lead to difficulty in passing the tab 4b through the opening 8. Therefore, under the constraint of the aforementioned ratio, 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 22-160 mm, so as to control the length L1 of the opening 8 in the second direction Y within an appropriate range, thereby matching the retainer 6 and the tab 4b with each other.
[0072] For example, the length L1 of the opening 8 in the second direction Y can be selected from one 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, 160 mm.
[0073] It should be noted that the length L2 of the tab 4b in the second direction Y affects the performance of the tab 4b. If the length L2 of the tab 4b in the second direction Y is too large, it can easily lead to difficulty in passing the tab 4b through the opening 8. If the length L2 of the tab 4b in the second direction Y is too small, it can easily lead to insufficient flow capacity of the tab 4b. Therefore, under the constraint of the aforementioned ratio, 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 20-80 mm, so as to match the tab 4b and the retainer 6, and the flow capacity of the tab 4b is sufficient to adapt to different specifications of the battery 100.
[0074] 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, 80 mm.
[0075] The retainer 6 is arranged between the cell body 4a and the cover plate 3, and cooperates with the cell body 4a and the cover plate 3 to bundle and position the tab 4b. The retainer 6 configured with the first plate 6a and the second plate 6b has various realizable modes, wherein, referring to Figures 7-10As an example of the present embodiment, the retainer 6 includes a retainer body 6c and two partitions 6d, the retainer body 6c is provided with a cavity, and the top of the cavity is provided with a cavity opening communicating with the outside; the two partitions 6d are arranged in the cavity, and the two partitions 6d are arranged at intervals, so as 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 arranged on both sides of the first cavity 6e in the second direction Y respectively.
[0076] The first plate 6a and the second plate 6b are arranged in the first cavity 6e and constitute the bottom of the first cavity 6e, so that the opening 8 communicates with the first cavity 6e, in this way, the tab 4b can pass through the opening 8 to enter the first cavity 6e, and after the retainer 6 is arranged between the cell body 4a and the cover plate 3, the pole 7 of the cover plate 3 can also enter the first cavity 6e through the cavity opening, so that the tab 4b passing through the opening 8 can be electrically connected with the pole 7.
[0077] The second cavity 6f can be arranged opposite to the liquid injection hole 9 or the explosion-proof valve of the battery 100, by separating the first cavity 6e and the second cavity 6f through the partition 6d, the influence of exhaust or liquid injection on the tab 4b can be avoided, and the structural strength of the retainer 6 can be improved. For example, referring to Figure 2 、 7 The second cavity 6f is arranged opposite to the liquid injection hole 9 of the battery 100. The third cavity 6g is used to limit the tab 4b to be arranged at intervals with the shell 1, so that the tab 4b maintains a certain distance with the shell 1 in the second direction Y, avoiding the tab 4b to be overlapped with the shell 1, preventing short circuit.
[0078] It can be understood that if the ratio of the first inclination angle a1, the second inclination angle a2, the width b of the opening 8 and the thickness m of the tab 4b is too small based on the formula (1), it is not conducive to the convergence of the tab 4b, and under the cooperation of the structure of the aforementioned retainer 6, the tab 4b can be conveniently converged in the first cavity 6e, reducing the difficulty of convergence of the tab 4b, so the ratio of the first inclination angle a1, the second inclination angle a2, the width b of the opening 8 and the thickness m of the tab 4b can also meet:
[0079]
[0080] In this way, the battery 100 structure of this example can also be implemented: the inclination angles of the first plate 6a and the second plate 6b can be matched with the specifications of the tab 4b, and there can be appropriate spaces between the first plate 6a, the second plate 6b, and the cover plate 3 to accommodate the tab 4b passing through the opening 8, ensuring that the retainer 6 can achieve a good convergence effect to ensure the guiding effect of the retainer 6 on the tab 4b, and by matching the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b with each other, the size of the opening 8 can be adapted to the specifications of the tab 4b, and the tab 4b can more easily pass through the retainer 6.
[0081] For example, the ratio of the first inclination angle a1, the second inclination angle a2, the width b of the opening 8, and the thickness m of the tab 4b based on formula (3) can be one of 0.6°, 1°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 200°, 300°, 400°, 500°, 600°, and 660°.
[0082] In order to facilitate the tab 4b to pass through the opening 8, in some battery 100 structures, as shown in FIG. 2, the first plate 6a and the second plate 6b can be arranged to be inclined to the cover plate 3, and the first plate 6a and the second plate 6b can be arranged to be inclined to each other. Figure 11 As an example of this embodiment, the outer side of the tab 4b, i.e. the outer surface of the tab 4b, can be connected with a guide 10, such as a tape, which has an insulating effect and can prevent the tab 4b from being inserted upside down and causing insulation failure. The guide 10 has a certain flexibility, and the surface friction coefficient of the guide 10 is less than that of the tab 4b, so that the guide 10 has a smoother surface than the tab 4b. By pulling the guide 10, the tab 4b can be better guided to pass through the opening 8.
[0083] In addition, in some battery 100 structures, as shown in FIG. 2, the first plate 6a and the second plate 6b can be arranged to be inclined to the cover plate 3, and the first plate 6a and the second plate 6b can be arranged to be inclined to each other. Figure 8 As an example of this embodiment, the tab 4b is provided with a pre-welded weld mark 11. By welding the tab 4b together with the weld mark 11, the tab 4b can be better converged and passed through the opening 8. Of course, in the case of providing the pre-welded weld mark 11, the weld mark 11 is arranged on the tab 4b with a certain area to ensure the effect of pre-welding, for example, as an example of this embodiment, the length of the weld mark 11 is L3, the width of the tab 4b is L2, and they satisfy: For example, the length L3 of the weld mark 11 is in the range of 25-70 mm, for example, it can be selected as one of 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 as one of 0.4, 0.5, 0.6, 0.7, 0.8, and 0.9.
[0084] Based on the above battery 100, the embodiment further provides a power battery system, which comprises a conductive row and at least two batteries 100 of any one of the above, and the conductive row is electrically connected with the pole 7 of the two batteries 100. Since the power battery system has the above battery 100, it also has the advantages of the above battery 100.
[0085] In summary, the embodiment of the application provides the battery 100 and the power battery system. By adjusting the angle of the first inclination angle α1, the angle of the second inclination angle α2, the size of the width b of the opening 8, and the size of 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 matched with each other. In this way, the inclination angles of the first plate 6a and the second plate 6b can be matched with the specifications of the tab 4b, and the first plate 6a, the second plate 6b, and the cover plate 3 can have a suitable space to accommodate the tab 4b passing through the opening 8, so as to ensure that the retainer 6 can achieve good convergence effect, so as to ensure the guiding effect of the retainer 6 on the tab 4b. Moreover, 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 with each other, the size of the opening 8 can be matched with the specifications of the tab 4b, and the tab 4b can pass through the retainer 6 more easily. Avoiding that the opening 8 is too small to affect the efficiency of the tab 4b passing through, and further affecting the assembly yield of the battery 100 as a whole.
[0086] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make some improvements and replacements without departing from the technical principles of the application. These improvements and replacements should also be considered as the protection scope of the application.
Claims
1. A battery, characterized by, The application relates to a battery, which comprises: a shell having a first end in a length direction; a cover plate mounted at least to the first end of the shell; an electric core arranged in the shell, and the electric core comprises an electric core body and a tab connected to the electric core body; an insulating piece arranged between the cover plate and the electric core; a retainer arranged between the electric core body and the cover plate, and having an opening facing the cover plate so that the tab passes through the opening, and the retainer has a first plate and a second plate arranged in a spaced manner relative to the opening, wherein the first plate extends towards the second plate and extends towards the cover plate, and the first plate is inclined to the length direction, and a first inclination angle alpha 1 is formed between the extending direction of the first plate and the length direction; the second plate extends towards the first plate and extends towards the cover plate, and the second plate is inclined to the length direction, and a second inclination angle alpha 2 is formed between the extending direction of the second plate and the length direction; and The width of the opening is b, the thickness of the tab is m, and the above parameters satisfy:
2. The battery of claim 1, wherein, the first inclination angle alpha 1 is in a range of 15 DEG to 88 DEG, and the second inclination angle alpha 2 is in a range of 15 DEG to 88 DEG.
3. The battery of claim 2, wherein, The first inclination angle a1 and the second inclination angle a2 satisfy:
4. The battery of claim 1, wherein, The thickness m of the tab is in a range of 0.2 mm to 4 mm.
5. The battery of claim 1, wherein, The width b of the opening is in a range of 1 mm to 12 mm.
6. The battery of claim 1, wherein, The first plate is located below the pole column, and a first accommodating space is formed between the first plate and the pole column; and the second plate is located below the pole column, and a second accommodating space is formed between the second plate and the pole column; and the tab passes through the opening and extends into the first accommodating space and / or the second accommodating space.
7. The battery of claim 1, wherein, The first plate comprises a first upper plate face and a first lower plate face arranged in a spaced manner in the length direction, and a first side plate face is connected between the first upper plate face and the first lower plate face, the first side plate face is located in the opening and faces the second plate, and a first included angle is formed between the first upper plate face and the first side plate face, and a second included angle is formed between the first lower plate face and the first side plate face, and the first included angle and / or the second included angle is a rounded angle; and / or the second plate comprises a second upper plate face and a second lower plate face arranged in a spaced manner in the length direction, and a second side plate face is connected between the second upper plate face and the second lower plate face, the second side plate face is located in the opening and faces the first plate, and a third included angle is formed between the second upper plate face and the second side plate face, and a fourth included angle is formed between the second lower plate face and the second side plate face, and the third included angle and / or the fourth included angle is a rounded angle.
8. The battery of claim 7, wherein, The first inclination angle a1, the second inclination angle a2, the width b of the opening, and the thickness m of the tab satisfy:
9. The battery of claim 1, wherein, 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:
10. The battery of claim 9, wherein, The length L1 of the opening in a second direction is in a range of 22 mm to 160 mm, and the length L2 of the tab in the second direction is in a range of 20 mm to 80 mm.
11. The battery of claim 1, wherein, The retainer comprises: a retainer body, and a cavity is arranged in the retainer body, and a cavity opening is arranged at the top of the cavity and communicates with the outside; at least one partition plate, and the two partition plates are arranged in a spaced manner, so that the cavity is at least divided into a first cavity and a second cavity, and The first plate and the second plate are arranged in the first cavity and constitute the bottom of the first cavity, so that the opening is communicated with the first cavity; the second cavity is arranged opposite to the liquid injection hole and / or the explosion-proof valve of the battery.
12. The battery of claim 11, wherein, The first inclination angle a1, the second inclination angle a2, the width b of the opening, and the thickness m of the tab satisfy:
13. The battery of claim 1, wherein, An outer side of the tab is connected with a guide.
14. The battery of claim 1, wherein, A pre-welding welding mark is arranged on the tab.
15. A power battery system, characterized in that, The battery includes a conductive row and at least two batteries according to any one of claims 1-14, and the conductive row is electrically connected with the pole of the two batteries.