Battery adapter piece and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery adapter plate and a battery, the battery adapter plate is provided with a pole welding part and two tab welding parts, each tab welding part extends along a first direction, and the two tab welding parts are positioned on two sides of the pole welding part along a second direction. And in the first direction, all the pole welding parts are positioned between the two tab welding parts. The battery adapter piece has a relatively large overcurrent capability and a relatively small thickness.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery adapter plate and battery. BACKGROUND

[0002] With the market demand for fast charging battery increasing, the heat generated by the overcurrent component in the fast charging battery during charging and discharging process also increases sharply. Because of the limited internal space of the battery, the overcurrent capacity of the adapter plate is under increasing pressure, and the heat generated by the overcurrent component in the battery cell is also increasing. This phenomenon leads to high local temperature of the battery and large overall temperature difference of the battery, resulting in reduced cycle life of the battery.

[0003] The existing adapter plate adopts a butterfly welding structure. Specifically, the tab welding portion on the adapter plate is located at one end of the adapter plate, and the pole welding portion is located at the other end of the adapter plate. That is, in the length direction of the adapter plate, only part of the length of the tab welding portion and the pole welding portion overlaps, the tab welding portion is arranged beyond the pole welding portion at one end of the adapter plate, and the pole welding portion is arranged beyond the tab welding portion at the other end of the adapter plate. This structure makes the current path on the adapter plate longer, and the overcurrent capacity is concentrated at the end of the adapter plate where the pole welding portion is arranged. In order to meet the demand for large current, the thickness of the adapter plate must be increased, which is not conducive to the welding of the tab component of the core package and the adapter plate, and increases the material cost. SUMMARY

[0004] The first object of the utility model is to provide a battery adapter plate with large overcurrent capacity and relatively small thickness.

[0005] The second object of the utility model is to provide a battery with relatively small overall temperature difference and long cycle life.

[0006] To achieve this object, the utility model adopts the following technical solutions:

[0007] The utility model discloses a battery adapter plate, the battery adapter plate has the pole welding portion and two tab welding portions, each tab welding portion is arranged along the first direction, and the two tab welding portions are located on the two sides of the pole welding portion along the second direction, wherein, in the first direction, all the pole welding portions are located between the two tab welding portions.

[0008] In some embodiments, in the first direction, the first end of the tab welding portion is flush with the first end of the pole welding portion, and the second end of the tab welding portion is arranged beyond the second end of the pole welding portion.

[0009] In some embodiments, the pole post welding portion has oppositely arranged first and second surfaces, the first surface is connected to the pole post member of the battery, the tab welding portion has oppositely arranged first and second wall surfaces, the second wall surface is connected to the tab member of the core package; wherein: in the thickness direction of the battery adapter piece, the pole post welding portion protrudes the tab welding portion to be arranged so that the second surface is below the second wall surface.

[0010] In some specific embodiments, in the thickness direction of the battery adapter piece, the first surface is arranged spaced apart from and below the first wall surface, so that a groove accommodating the pole post member is formed on the battery adapter piece.

[0011] In some specific embodiments, the second surface has anti-glare structures arranged protruding or recessed.

[0012] In some embodiments, the battery adapter piece is further provided with a weight reduction hole, the weight reduction hole is arranged spaced apart from the pole post welding portion along a first direction and between the two tab welding portions.

[0013] The utility model discloses a kind of batteries, shell, top cover assembly, two core packages and the battery adapter piece described in the foregoing text;Wherein: the shell has the installation cavity of open arrangement, the top cover assembly is connected with the shell to close the top cover assembly, the core package is installed in the installation cavity, the battery adapter piece is used to connect the tab member of the core package and the pole post member on the top cover assembly.

[0014] In some embodiments, the top cover assembly includes a top cover sheet, a pole post member and an insulating member, the insulating member is installed on the side of the top cover sheet facing the core package;The pole post member is arranged through the top cover sheet and the insulating member and insulated from the top cover sheet;Wherein: the first surface of the pole post welding portion of the battery adapter piece abuts the end of the pole post member penetrating the insulating member, and the first wall surface of the tab welding portion of the battery adapter piece is arranged spaced apart from the surface of the insulating member away from the top cover sheet.

[0015] In some embodiments, the distance between the first wall surface of the tab welding portion of the battery adapter piece and the surface of the insulating member away from the top cover sheet is greater than or equal to 0.1 mm.

[0016] In some embodiments, one end of the installation cavity is open, one end of the core package is provided with a positive electrode lug and a negative electrode lug arranged at intervals, and the top cover assembly is provided with a positive electrode column and a negative electrode column; the battery adapter piece is two, which are a positive electrode adapter piece and a negative electrode adapter piece, the positive electrode adapter piece is used for connecting the positive electrode lug and the positive electrode column, and the negative electrode column is used for connecting the negative electrode lug and the negative electrode column; the material of the positive electrode adapter piece and the negative electrode adapter piece is not the same; the battery adapter piece is provided with a foolproof structure for distinguishing the positive electrode adapter piece and the negative electrode adapter piece.

[0017] The battery adapter piece has the advantages that: the pole column welding part is arranged between the two lug welding parts, the welding mark formed in the process of welding the battery adapter piece and the lug part is arranged close to the pole column welding part, so that the pole column welding part does not have a part exceeding the two lug welding parts in the first direction, compared with the prior art in which the pole column welding part and the lug welding part are arranged at two ends, the battery adapter piece has higher current carrying capacity and smaller thickness.

[0018] The battery has the advantages that: the battery adapter piece has good current carrying capacity, can reduce the overall temperature difference of the battery, and prolongs the cycle life of the battery.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the battery adapter piece of the embodiment of the present application;

[0021] Figure 2 is a structural schematic view of another direction of the battery adapter piece of the embodiment of the present application;

[0022] Figure 3 is a connection schematic view of the battery adapter piece and the top cover assembly of the battery of the embodiment of the present application;

[0023] Figure 4 is a connection schematic view of the battery adapter piece and the core package of the embodiment of the present application;

[0024] Figure 5 is an exploded structural schematic view of the battery of the embodiment of the present application;

[0025] Figure 6 is a structural schematic view of the positive electrode adapter piece and the negative electrode adapter piece of the embodiment of the present application.

[0026] REFERENCE NUMERALS:

[0027] 100, battery adapter plate; 110, pole welding portion; 111, first surface; 112, second surface; 120, tab welding portion; 121, first wall surface; 122, second wall surface; 130, anti-glare structure; 140, weight-reducing hole; 150, fool-proof structure; 101, positive electrode adapter plate; 102, negative electrode adapter plate; 200, top cover assembly; 210, top cover sheet; 220, pole piece; 221, positive electrode pole piece; 222, negative electrode pole piece; 230, insulating piece; 300, core package; 310, tab piece; 311, positive electrode tab piece; 312, negative electrode tab piece; 400, shell; 500, top cover patch; 600, insulating film; 700, bottom support sheet; 800, protective film. DETAILED DESCRIPTION

[0028] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0029] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, 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, 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 circumstances.

[0030] In the description of the embodiment, the terms "upper", "lower", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and not to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0031] The utility model discloses a kind of battery adapter plate 100, refer to Figure 1 And Figure 2 As shown in the drawings, battery adapter plate 100 has pole welding portion 110 and two tab welding portions 120, each tab welding portion 120 is arranged along the first direction, and two tab welding portions 120 are located on the two sides of pole welding portion 110 along the second direction. In the first direction, all pole welding portions 110 are located between two tab welding portions 120.

[0032] It can be understood that, since the pole post welding portions 110 are arranged between the two pole lug welding portions 120, and all the pole post welding portions 110 are located between the two pole lug welding portions 120, in the first direction, the pole post welding portions 110 do not have a part that exceeds the two pole lug welding portions 120, and in the process of welding the battery adapter tab 100 and the pole lug piece 310, the formed welding marks are arranged close to the pole post welding portions 110, so that the current path on the battery adapter tab 100 is shorter, compared with the prior art in which the pole post welding portions and the pole lug welding portions are located at both ends, the battery adapter tab 100 of the embodiment has higher overcurrent capacity and smaller thickness.

[0033] Optionally, in the second direction, the pole post welding portions 110 are arranged in the middle of the two pole lug welding portions 120, that is, the distance between the center line of the pole post welding portions 110 and the center line of the two pole lug welding portions 120 is equal. In this way, in the process of welding the battery adapter tab 100 and the pole lug piece 310, the formed welding marks are arranged close to the center line of the pole post welding portions 110, so that the current path on the battery adapter tab 100 is shorter, so that the battery adapter tab 100 has higher overcurrent capacity and smaller thickness.

[0034] Reference Figure 1 and Figure 2 It can be understood that, in the prior art, the pole post welding portions and the pole lug welding portions are located at both ends of the adapter tab, resulting in a longer current path on the adapter tab, and the current path is almost equal to the distance between both ends of the adapter tab. In the embodiment, in the first direction, the first end of the pole lug welding portion 120 is arranged flush with the first end of the pole post welding portion 110, which can shorten the current path on the battery adapter tab 100 of the embodiment, thereby facilitating the improvement of the overcurrent capacity of the battery adapter tab 100. In addition, compared with the prior art, the battery adapter tab 100 of the embodiment has a smaller length dimension (dimension in the first direction), which saves costs and facilitates assembly.

[0035] It should be noted that the dimension of the pole lug welding portion 120 in the first direction can be selected according to actual overcurrent needs, and the dimension of the pole lug welding portion 120 in the second direction is greater than or equal to 3 mm, which ensures that the pole lug welding portion 120 can be stably welded with the pole lug piece 310 of the core pack 300.

[0036] Reference Figure 3 and Figure 4As shown, the pole post welding portion 110 has oppositely arranged first surface 111 and second surface 112, the first surface 111 is connected to the pole post member 220 of the battery, the tab welding portion 120 has oppositely arranged first wall surface 121 and second wall surface 122, the second wall surface 122 is connected to the tab member 310 of the core package 300; wherein: in the thickness direction of the battery adapter sheet 100, the pole post welding portion 110 protrudes the tab welding portion 120, so that the second surface 112 is below the second wall surface 122. It can be understood that, since in the thickness direction of the battery adapter sheet 100, the pole post welding portion 110 protrudes the tab welding portion 120, so that the second surface 112 is below the second wall surface 122, it can ensure that the battery adapter sheet 100 and the tab member 310 and the pole post member 220 are not interfered with each other during welding, and facilitate the welding process, thereby facilitating the assembly of the entire battery. In addition, since the pole post welding portion 110 protrudes the tab welding portion 120, during actual welding, the battery adapter sheet 100 can be welded to the core package 300 first, then the core package 300 with the battery adapter sheet 100 welded is connected to the top cover assembly 200, and then the battery adapter sheet 100 and the pole post member 220 are welded. Compared with the connection of the battery adapter sheet 100 and the top cover assembly 200, in the process of welding the battery adapter sheet 100 and the core package 300, the adverse effects of the battery adapter sheet 100 and the pole post member 220 on the insulating member 230 and other structures in the top cover assembly 200 during welding can be avoided.

[0037] Reference Figure 1 And Figure 2 As shown, in the thickness direction of the battery adapter sheet 100, the first surface 111 and the first wall surface 121 are spaced apart and located below the first wall surface 121, so that a groove for accommodating the pole post member 220 is formed on the battery adapter sheet 100. It can be understood that, since in the thickness direction of the battery adapter sheet 100, the first surface 111 is below the first wall surface 121 and the second surface 112 is below the second wall surface 122, during actual manufacturing of the battery adapter sheet 100, a protruding structure is formed at the middle position of the battery adapter sheet 100 by stamping or other processes, the protruding structure constitutes the pole post welding portion 110, and the two side regions of the protruding structure constitute the tab welding portion 120, which simplifies the manufacturing process of the battery adapter sheet 100. At the same time, since the battery adapter sheet 100 is provided with the groove for accommodating the pole post member 220, it can play a role of positioning the installation of the pole post member 220 during assembly, and can ensure the stability of the pole post member 220 during welding, thereby improving the welding quality. Optionally, the bottom wall of the groove is a smooth plane. It can be understood that, since the bottom wall of the groove is a smooth plane, the bottom wall of the groove and the pole post member 220 can stably abut, thereby facilitating the connection stability of the pole post member 220 and the pole post welding portion 110.

[0038] Reference Figure 2 As shown, the second surface 112 has anti-glare structures 130 arranged in protrusions or depressions. It can be understood that in actual operation, the welding form of the battery adapter piece 100 and the pole piece 220 is mostly laser welding, and during the process, the laser is shot on the second surface 112 for welding connection. The anti-glare structures 130 arranged on the second surface 112 can facilitate the laser welding process, thereby improving the connection firmness of the battery adapter piece 100 and the pole piece 220. Alternatively, the anti-glare structures 130 are formed as a plurality of convexities, and the plurality of convexities are arranged in multiple rows and multiple columns or a cylindrical array on the second surface 112. The anti-glare structures 130 can also be formed as a plurality of concavities, and the plurality of concavities are arranged in multiple rows and multiple columns or a cylindrical array on the second surface 112. In the embodiments of the present application, the anti-glare structures 130 can be selected according to actual needs, as long as the second surface 112 is not a smooth plane.

[0039] Reference Figure 1 and Figure 2 As shown, the battery adapter piece 100 is also provided with a weight-reducing hole 140, which is arranged along the first direction and between the two tab welding portions 120. It can be understood that the added weight-reducing hole 140 can reduce the weight of the battery adapter piece 100, and can separate the parts of the two tab welding portions 120 that protrude beyond the pole welding portion 110, facilitating the welding process.

[0040] The utility model discloses a kind of batteries, reference Figure 4 As shown, the battery includes a shell 400, a top cover assembly 200, two core packs 300 and the battery adapter piece 100 of the foregoing, the shell 400 has an open installation cavity, the top cover assembly 200 is connected with the shell 400 to close the top cover assembly 200, the core pack 300 is installed in the installation cavity, and the battery adapter piece 100 is used to connect the tab piece 310 of the core pack 300 and the pole piece 220 on the top cover assembly 200. Since the battery adapter piece 100 described above is provided, the battery adapter piece 100 has good overcurrent capacity, which can reduce the overall temperature difference of the battery, thereby prolonging the cycle life of the battery.

[0041] Reference Figure 3As shown, the top cover assembly 200 includes a top cover sheet 210, a pole piece 220, and an insulating piece 230, the insulating piece 230 is installed on the side of the top cover sheet 210 facing the core pack 300; the pole piece 220 is provided through the top cover sheet 210 and the insulating piece 230 and is insulated from the top cover sheet 210. The first surface 111 of the pole welding portion 110 of the battery adapter sheet 100 abuts against one end of the pole piece 220 penetrating the insulating piece 230, and the first wall surface 121 of the tab welding portion 120 of the battery adapter sheet 100 is spaced apart from the surface of the insulating piece 230 away from the top cover sheet 210. It can be understood that, since in the thickness direction of the battery adapter sheet 100, the first surface 111 of the pole welding portion 110 is located below the first wall surface 121 of the tab welding portion 120, if the first wall surface 121 of the tab welding portion 120 of the battery adapter sheet 100 directly abuts against the insulating piece 230, it will increase the risk of the first surface 111 of the pole welding portion 110 not tightly adhering to the pole piece 220, thereby reducing the welding quality of the pole welding portion 110 and the pole piece 220. In the present embodiment, the first wall surface 121 of the tab welding portion 120 of the battery adapter sheet 100 is spaced apart from the surface of the insulating piece 230 away from the top cover sheet 210, which can ensure the tight adhesion of the pole welding portion 110 and the pole piece 220, thereby increasing the welding quality of the two.

[0042] Optionally, the distance between the first wall surface 121 of the tab welding portion 120 of the battery adapter sheet 100 and the surface of the insulating piece 230 away from the top cover sheet 210 is greater than or equal to 0.1 mm.

[0043] Reference Figure 4 As shown, one end of the installation cavity is open, one end of the core pack 300 is provided with a positive tab piece 311 and a negative tab piece 312 which are spaced apart, and the top cover assembly 200 is provided with a positive pole piece 221 and a negative pole piece 222; the battery adapter sheet 100 is two, which are a positive adapter sheet 101 and a negative adapter sheet 102, the positive adapter sheet 101 is used to connect the positive tab piece 311 and the positive pole piece 221, and the negative pole piece 222 is used to connect the negative tab piece 312 and the negative pole piece 222; the materials of the positive adapter sheet 101 and the negative adapter sheet 102 are not the same. It can be understood that, since one end of the installation cavity is open, the positive pole piece 221 and the negative pole piece 222 of the battery are located at one end of the battery after installation, which can facilitate the electrical connection between the battery and the external electrical equipment.

[0044] Optionally, reference Figure 5As shown, the top cover assembly 200 is further provided with a top cover patch 500, the outer side of the core package 300 can be further wrapped with an insulating film 600, the outer side of the shell 400 can be further wrapped with a protective film 800, and the bottom wall of the shell 400 is further provided with a bottom support 700. The top cover patch 500, the insulating film 600, the protective film 800 and the bottom support 700 are all common protection structures of batteries, and the specific material, shape and related parameters of the top cover patch 500, the insulating film 600, the protective film 800 and the bottom support 700 are not described in detail here.

[0045] Optionally, as shown in Figure 1 and Figure 2 As shown, the battery adapter piece 100 is provided with a foolproof structure 150, and the foolproof structure 150 is used to distinguish the positive electrode adapter piece 101 and the negative electrode adapter piece 102. It can be understood that, in the actual assembly process, since the structure of the positive electrode adapter piece 101 and the negative electrode adapter piece 102 is relatively similar, only the material is different, and in the actual assembly process, the positive electrode adapter piece 101 and the negative electrode adapter piece 102 are easily confused, and in the embodiment, the foolproof structure 150 is arranged on the battery adapter piece 100 to distinguish the positive electrode adapter piece 101 and the negative electrode adapter piece 102, so as to avoid confusion of the positive electrode adapter piece 101 and the negative electrode adapter piece 102, and ensure the reliability of the battery.

[0046] Specifically, as shown in Figure 6 As shown, the battery adapter piece 100 is further provided with a weight reduction hole 140, the weight reduction hole 140 is arranged along the first direction and is spaced apart from the pole welding portion 110, and the weight reduction hole 140 is arranged with an opening on the side away from the pole welding portion 110, and the foolproof structure 150 forms a matching surface on the opening of the weight reduction hole 140, wherein the matching surface on the positive electrode adapter piece 101 is an inclined surface, and the matching surface on the negative electrode adapter piece 102 is a circular arc surface. Of course, in other embodiments of the utility model, the foolproof structure 150 can also be selected in other shapes according to actual needs, for example, the foolproof structure 150 is formed as a positive and negative electrode mark arranged on the battery adapter piece 100.

[0047] In the description of the present specification, the description of the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A battery adapter, characterized in that, The battery adapter has a terminal post welding portion (110) and two tab welding portions (120), each of the tab welding portions (120) extends along a first direction, and the two tab welding portions (120) are located on both sides of the terminal post welding portion (110) along a second direction; wherein: in the first direction, all the terminal post welding portions (110) are located between the two tab welding portions (120).

2. The battery adapter according to claim 1, characterized in that, In the first direction, the first end of the tab welding portion (120) is flush with the first end of the pole welding portion (110), and the second end of the tab welding portion (120) extends beyond the second end of the pole welding portion (110).

3. The battery adapter according to claim 1, characterized in that, The electrode welding portion (110) has a first surface (111) and a second surface (112) disposed opposite to each other. The first surface (111) is connected to the electrode post (220) of the battery. The electrode welding portion (120) has a first wall surface (121) and a second wall surface (122) disposed opposite to each other. The second wall surface (122) is connected to the electrode tab (310) of the core package (300). In the thickness direction of the battery adapter piece, the electrode welding portion (110) protrudes from the electrode welding portion (120) so that the second surface (112) is located below the second wall surface (122).

4. The battery adapter according to claim 3, characterized in that, In the thickness direction of the battery adapter piece, the first surface (111) is spaced apart from the first wall surface (121) and is located below the first wall surface (121) so that a groove for accommodating the terminal post (220) is formed on the battery adapter piece.

5. The battery adapter according to claim 3, characterized in that, The second surface (112) has a raised or recessed anti-reflective structure (130).

6. The battery adapter according to claim 1, characterized in that, The battery adapter plate is also provided with a weight reduction hole (140), which is spaced apart from the electrode welding part (110) along the first direction and located between the two electrode welding parts (120).

7. A battery, characterized in that, The outer casing (400), the top cover assembly (200), the core pack (300), and the battery adapter plate as described in any one of claims 1-6; wherein: The housing (400) has an open mounting cavity, the top cover assembly (200) is connected to the housing (400) to close the top cover assembly (200), the core pack (300) is mounted in the mounting cavity, and the battery adapter is used to connect the tab (310) of the core pack (300) and the terminal post (220) on the top cover assembly (200).

8. The battery according to claim 7, characterized in that, The top cover assembly (200) includes a top cover plate (210), a pole piece (220), and an insulating member (230). The insulating member (230) is mounted on the side of the top cover plate (210) facing the core package (300). The pole piece (220) passes through the top cover plate (210) and the insulating member (230) and is insulated from the top cover plate (210). The first surface (111) of the electrode welding portion (110) of the battery adapter plate abuts against one end of the electrode member (220) that protrudes from the insulating member (230), and the first wall surface (121) of the tab welding portion (120) of the battery adapter plate is spaced apart from the surface of the insulating member (230) that is away from the top cover plate (210).

9. The battery according to claim 8, characterized in that, The distance between the first wall surface (121) of the electrode welding portion (120) of the battery adapter piece and the surface of the insulating member (230) facing away from the top cover piece (210) is greater than or equal to 0.1 mm.

10. The battery according to claim 7, characterized in that, One end of the mounting cavity is open, and one end of the core package (300) is provided with a positive electrode tab (311) and a negative electrode tab (312) spaced apart. The top cover assembly (200) is provided with a positive electrode post (221) and a negative electrode post (222). There are two battery adapter pieces, which are a positive electrode adapter piece (101) and a negative electrode adapter piece (102), respectively. The positive electrode adapter piece (101) is used to connect the positive electrode tab (311) and the negative electrode tab (312). 1) and the positive electrode post (221), the negative electrode post (222) is used to connect the negative electrode tab (312) and the negative electrode post (222); the positive electrode adapter (101) and the negative electrode adapter (102) are made of different materials; wherein: the battery adapter is provided with a foolproof structure (150), the foolproof structure (150) is used to distinguish the positive electrode adapter (101) and the negative electrode adapter (102).

Images