CN220544183U - Battery - Google Patents

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Publication number
CN220544183U
CN220544183U CN202322149453.8U CN202322149453U CN220544183U CN 220544183 U CN220544183 U CN 220544183U CN 202322149453 U CN202322149453 U CN 202322149453U CN 220544183 U CN220544183 U CN 220544183U
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tab
battery
pole piece
piece
wall section
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赵冬
马俊杰
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China Innovation Aviation Technology Group Co ltd
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China Innovation Aviation Technology Group Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The utility model relates to the technical field of batteries, and provides a battery, which comprises: the battery cell comprises a battery cell main body and a first tab, wherein the battery cell main body comprises a first pole piece, the first tab extends out from the first pole piece, the first pole piece comprises a plurality of first single-piece pole piece layers which are arranged in a laminated manner, and the first tab comprises a plurality of first single-piece tab layers which are arranged in a laminated manner; the battery cell is arranged in the shell, the shell comprises a cover plate and a shell piece, the shell piece comprises a side wall section and a bottom wall section, and the side wall section and the bottom wall section are of an integrated structure; the pole column structure is arranged on the bottom wall section and is electrically connected with the battery cell. Through making the total number of first monolithic tab layer and the ratio of total number of first monolithic pole piece layer be 0.31-0.92, not only can reduce the risk of dislocation layer behind the first monolithic tab layer beam harvest, and on the basis of guaranteeing first tab overflow ability, first tab overall thickness can not be too big, and then improves battery inner space utilization.

Description

电池Battery

技术领域Technical field

本实用新型涉及电池技术领域,尤其涉及一种电池。The utility model relates to the field of battery technology, and in particular to a battery.

背景技术Background technique

相关技术中,电芯可以采用全极耳引出,极耳收束后可能会出现错层严重的情况,并且在极耳弯折之后整体厚度增加,使得电池内部空间利用率较低,从而影响电池的使用性能。In the related technology, the battery core can be drawn out using all tabs. After the tabs are bundled, serious misalignment may occur, and the overall thickness increases after the tabs are bent, resulting in low utilization of the internal space of the battery, thus affecting the battery. usage performance.

实用新型内容Utility model content

本实用新型提供一种电池,以改善电池的使用性能。The utility model provides a battery to improve the performance of the battery.

本实用新型提供了一种电池,包括:The utility model provides a battery, which includes:

电芯,电芯包括电芯主体和第一极耳,电芯主体包括第一极片,第一极耳由第一极片上延伸而出,第一极片包括多个层叠设置的第一单片极片层,第一极耳包括多个层叠设置的第一单片极耳层,第一单片极耳层由第一单片极片层上延伸而出,且第一单片极耳层的总数量与第一单片极片层的总数量之比为0.31-0.92;The battery core includes a battery core body and a first pole piece. The battery core body includes a first pole piece. The first pole piece extends from the first pole piece. The first pole piece includes a plurality of first cells arranged in a stack. The pole piece layer, the first tab includes a plurality of first monolithic tab layers arranged in a stack, the first monolithic tab layer extends from the first monolithic tab layer, and the first monolithic tab layer The ratio of the total number of layers to the total number of first monolithic pole piece layers is 0.31-0.92;

壳体,电芯设置于壳体内,壳体包括盖板和壳体件,壳体件包括侧壁段和底壁段,侧壁段和底壁段为一体成型式结构,盖板与侧壁段相连接,且盖板与底壁段相对设置;Shell, the battery core is arranged in the shell, the shell includes a cover plate and a shell part, the shell part includes a side wall section and a bottom wall section, the side wall section and the bottom wall section are an integral structure, the cover plate and the side wall The sections are connected, and the cover plate and the bottom wall section are arranged oppositely;

极柱结构,极柱结构设置于底壁段上,且与电芯电连接。The pole structure is arranged on the bottom wall section and is electrically connected to the battery core.

本实用新型实施例的电池包括电芯、壳体以及极柱结构,极柱结构与电芯电连接,壳体包括盖板和壳体件,壳体件的侧壁段和底壁段为一体成型式结构,极柱结构设置于底壁段上,由此合理利用壳体件的空间,提高壳体的结构稳定性。而电芯包括电芯主体和第一极耳,电芯主体的第一极片由多个层叠设置的第一单片极片层形成,第一极耳由多个层叠设置的第一单片极耳层形成,通过使得第一单片极耳层由第一单片极片层上延伸而出,且第一单片极耳层的总数量与第一单片极片层的总数量之比为0.31-0.92,即第一单片极耳层的总数量小于第一单片极片层的总数量,不仅可以降低第一单片极耳层收束后错层的风险,且在保证第一极耳过流能力的基础上,第一极耳整体厚度不会太大,进而来提高电池内部空间利用率,从而可靠改善电池的使用性能。The battery in the embodiment of the present utility model includes a battery core, a casing and a pole structure. The pole structure is electrically connected to the battery core. The casing includes a cover plate and a casing part. The side wall section and the bottom wall section of the casing part are integrated. In the molded structure, the pole structure is arranged on the bottom wall section, thereby rationally utilizing the space of the shell parts and improving the structural stability of the shell. The battery core includes a battery core body and a first pole piece. The first pole piece of the battery core body is formed of a plurality of first monolithic pole piece layers arranged in a stack. The first pole piece is composed of a plurality of stacked first monolithic pole pieces. The tab layer is formed by causing the first monolithic tab layer to extend from the first monolithic tab layer, and the total number of the first monolithic tab layer is equal to the total number of the first monolithic tab layer. The ratio is 0.31-0.92, that is, the total number of the first monolithic tab layer is less than the total number of the first monolithic tab layer, which can not only reduce the risk of misalignment after the first monolithic tab layer is gathered, but also ensure Based on the overcurrent capacity of the first tab, the overall thickness of the first tab will not be too large, thereby improving the utilization of the internal space of the battery, thereby reliably improving the performance of the battery.

附图说明Description of drawings

为了更好地理解本公开,可参考在下面的附图中示出的实施例。在附图中的部件未必是按比例的,并且相关的元件可能省略,以便强调和清楚地说明本公开的技术特征。另外,相关要素或部件可以有如本领域中已知的不同的设置。此外,在附图中,同样的附图标记在各个附图中表示相同或类似的部件。其中:For a better understanding of the disclosure, reference may be made to the embodiments illustrated in the following drawings. Parts in the drawings are not necessarily to scale, and relevant elements may be omitted in order to emphasize and clearly illustrate technical features of the present disclosure. Additionally, related elements or components may have different arrangements as is known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components in the respective drawings. in:

图1是根据一示例性实施方式示出的一种电池的结构示意图;Figure 1 is a schematic structural diagram of a battery according to an exemplary embodiment;

图2是根据一示例性实施方式示出的一种电池的局部剖面结构示意图;Figure 2 is a schematic partial cross-sectional structural diagram of a battery according to an exemplary embodiment;

图3是根据另一示例性实施方式示出的一种电池的局部剖面结构示意图;Figure 3 is a schematic partial cross-sectional structural diagram of a battery according to another exemplary embodiment;

图4是根据一示例性实施方式示出的一种电池的电芯的结构示意图;Figure 4 is a schematic structural diagram of a battery cell according to an exemplary embodiment;

图5是根据一示例性实施方式示出的一种电池的电芯的局部结构示意图。FIG. 5 is a partial structural diagram of a cell of a battery according to an exemplary embodiment.

附图标记说明如下:The reference symbols are explained as follows:

10、电芯;11、电芯主体;111、第一极片;1111、第一单片极片层;112、第二极片;113、隔膜;114、端面;12、第一极耳;121、第一单片极耳层;13、第二极耳;20、壳体;21、盖板;22、壳体件;221、侧壁段;222、底壁段;30、极柱结构;31、通孔;40、转接件。10. Battery core; 11. Battery core body; 111. First pole piece; 1111. First single pole piece layer; 112. Second pole piece; 113. Diaphragm; 114. End face; 12. First pole tab; 121. The first monolithic tab layer; 13. The second tab; 20. Shell; 21. Cover plate; 22. Case piece; 221. Side wall section; 222. Bottom wall section; 30. pole structure ; 31. Through hole; 40. Adapter.

具体实施方式Detailed ways

下面将结合本公开示例实施例中的附图,对本公开示例实施例中的技术方案进行清楚、完整的描述。本文中的描述的示例实施例仅仅是用于说明的目的,而并非用于限制本公开的保护范围,因此应当理解,在不脱离本公开的保护范围的情况下,可以对示例实施例进行各种修改和改变。The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Therefore, it should be understood that various modifications may be made to the example embodiments without departing from the scope of the present disclosure. modifications and changes.

在本公开的描述中,除非另有明确的规定和限定,术语“第一”、“第二”仅用于描述的目的,而不能理解为指示或暗示相对重要性;术语“多个”是指两个或两个以上;术语“和/或”包括一个或多个相关联列出项目的任何组合和所有组合。特别地,提到“该/所述”对象或“一个”对象同样旨在表示可能的多个此类对象中的一个。In the description of the present disclosure, unless otherwise expressly stated and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" is refers to two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of a possible plurality of such objects.

除非另有规定或说明,术语“连接”、“固定”等均应做广义理解,例如,“连接”可以是固定连接,也可以是可拆卸连接,或一体地连接,或电连接,或信号连接;“连接”可以是直接相连,也可以通过中间媒介间接相连。对于本领域的技术人员而言,可以根据具体情况理解上述术语在本公开中的具体含义。Unless otherwise specified or stated, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal. Connection; "Connection" can be a direct connection or an indirect connection through an intermediary. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

进一步地,本公开的描述中,需要理解的是,本公开的示例实施例中所描述的“上”、“下”、“内”、“外”等方位词是以附图所示的角度来进行描述的,不应理解为对本公开的示例实施例的限定。还需要理解的是,在上下文中,当提到一个元件或特征连接在另外元件(一个或多个)“上”、“下”、或者“内”、“外”时,其不仅能够直接连接在另外(一个或多个)元件“上”、“下”或者“内”、“外”,也可以通过中间元件间接连接在另外(一个或多个)元件“上”、“下”或者“内”、“外”。Further, in the description of the present disclosure, it should be understood that the directional terms such as “upper”, “lower”, “inner”, and “outer” described in the exemplary embodiments of the present disclosure are from the angle shown in the drawings. This description should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that when the context refers to one element or feature being connected to "on", "below", "in" or "outside" another element(s), it is not merely directly connected. "on", "below" or "inside" or "outside" another element (one or more), or can also be indirectly connected to another element (one or more) "on", "below" or "outside" through an intermediate element. inside and outside".

本实用新型的一个实施例提供了一种电池,请参考图1至图5,电池包括:电芯10,电芯10包括电芯主体11和第一极耳12,电芯主体11包括第一极片111,第一极耳12由第一极片111上延伸而出,第一极片111包括多个层叠设置的第一单片极片层1111,第一极耳12包括多个层叠设置的第一单片极耳层121,第一单片极耳层121由第一单片极片层1111上延伸而出,且第一单片极耳层121的总数量与第一单片极片层1111的总数量之比为0.31-0.92;壳体20,电芯10设置于壳体20内,壳体20包括盖板21和壳体件22,壳体件22包括侧壁段221和底壁段222,侧壁段221和底壁段222为一体成型式结构,盖板21与侧壁段221相连接,且盖板21与底壁段222相对设置;极柱结构30,极柱结构30设置于底壁段222上,且与电芯10电连接。One embodiment of the present invention provides a battery. Please refer to Figures 1 to 5. The battery includes: a battery core 10. The battery core 10 includes a battery core body 11 and a first tab 12. The battery core body 11 includes a first battery lug. The pole piece 111 and the first pole piece 12 extend from the first pole piece 111. The first pole piece 111 includes a plurality of first single piece pole piece layers 1111 arranged in a stack. The first pole piece 12 includes a plurality of stacked pole pieces. The first monolithic tab layer 121 extends from the first monolithic tab layer 1111, and the total number of the first monolithic tab layer 121 is the same as the first monolithic tab layer 1111. The ratio of the total number of sheets 1111 is 0.31-0.92; the housing 20, the battery core 10 is arranged in the housing 20, the housing 20 includes a cover plate 21 and a housing part 22, the housing part 22 includes a side wall section 221 and a The bottom wall section 222, the side wall section 221 and the bottom wall section 222 are one-piece structures, the cover plate 21 is connected to the side wall section 221, and the cover plate 21 and the bottom wall section 222 are arranged oppositely; the pole structure 30, the pole The structure 30 is disposed on the bottom wall section 222 and is electrically connected to the battery core 10 .

本实用新型一个实施例的电池包括电芯10、壳体20以及极柱结构30,极柱结构30与电芯10电连接,壳体20包括盖板21和壳体件22,壳体件22的侧壁段221和底壁段222为一体成型式结构,极柱结构30设置于底壁段222上,由此合理利用壳体件22的空间,提高壳体20的结构稳定性。而电芯10包括电芯主体11和第一极耳12,电芯主体11的第一极片111由多个层叠设置的第一单片极片层1111形成,第一极耳12由多个层叠设置的第一单片极耳层121形成,通过使得第一单片极耳层121由第一单片极片层1111上延伸而出,且第一单片极耳层121的总数量与第一单片极片层1111的总数量之比为0.31-0.92,即第一单片极耳层121的总数量小于第一单片极片层1111的总数量,不仅可以降低第一单片极耳层121收束后错层的风险,且在保证第一极耳12过流能力的基础上,第一极耳12整体厚度不会太大,进而来提高电池内部空间利用率,从而可靠改善电池的使用性能。A battery according to one embodiment of the present invention includes a battery core 10, a casing 20 and a pole structure 30. The pole structure 30 is electrically connected to the battery core 10. The casing 20 includes a cover plate 21 and a casing part 22. The casing part 22 The side wall section 221 and the bottom wall section 222 are one-piece structures, and the pole structure 30 is arranged on the bottom wall section 222, thereby rationally utilizing the space of the housing member 22 and improving the structural stability of the housing 20. The battery core 10 includes a battery core body 11 and a first pole piece 12. The first pole piece 111 of the battery core body 11 is formed by a plurality of first monolithic pole piece layers 1111 arranged in a stack. The first pole piece 12 is composed of a plurality of stacked first pole piece layers 1111. The stacked first monolithic tab layer 121 is formed by making the first monolithic tab layer 121 extend from the first monolithic tab layer 1111 , and the total number of the first monolithic tab layer 121 is equal to The ratio of the total number of first monolithic pole piece layers 1111 is 0.31-0.92, that is, the total number of first monolithic tab layers 121 is less than the total number of first monolithic pole piece layers 1111, which not only reduces the The risk of mis-layering after the tab layer 121 is closed, and on the basis of ensuring the over-current capability of the first tab 12, the overall thickness of the first tab 12 will not be too large, thereby improving the internal space utilization of the battery, thereby ensuring reliability Improve battery performance.

需要说明的是,结合图1至图4所示,电芯10包括电芯主体11和由电芯主体11上延伸而出的第一极耳12,第一极耳12可以与极柱结构30电连接。It should be noted that, as shown in FIGS. 1 to 4 , the battery core 10 includes a battery core body 11 and a first pole lug 12 extending from the battery core body 11 . The first pole lug 12 can be connected with the pole structure 30 Electrical connection.

电池包括电芯和电解质,能够进行诸如充电/放电的电化学反应的最小单元。电芯是指将堆叠部卷绕或层压形成的单元,该堆叠部包括第一极片、隔膜以及第二极片。当第一极片为正极片时,第二极片为负极片。其中,第一极片和第二极片的极性可以互换。第一极片和第二极片涂布活性物质。A battery consists of a cell and an electrolyte, the smallest unit capable of performing electrochemical reactions such as charging/discharging. An electric core refers to a unit formed by winding or laminating a stacked portion, which includes a first pole piece, a separator, and a second pole piece. When the first pole piece is the positive pole piece, the second pole piece is the negative pole piece. Wherein, the polarities of the first pole piece and the second pole piece can be interchanged. The first pole piece and the second pole piece are coated with active material.

结合图5所示,第一极片111和第二极片112之间可以设置有隔膜113,图5中示出的第一极片111由多个第一单片极片层1111形成,而对于第二极片112和隔膜113并未进行结构的划分,仅是示意出了与第一单片极片层1111的位置关系。As shown in FIG. 5 , a separator 113 may be provided between the first pole piece 111 and the second pole piece 112 . The first pole piece 111 shown in FIG. 5 is formed of a plurality of first monolithic pole piece layers 1111 , and The structure of the second pole piece 112 and the separator 113 is not divided, and only the positional relationship with the first single pole piece layer 1111 is shown.

电芯10可以为卷绕式电芯,此时,第一单片极片层1111的多个第一单片极片层1111连接形成了一个整体的第一单片极片层1111;或者,电芯10可以为叠片式电芯,此时,第一单片极片层1111的多个第一单片极片层1111均独立设置。The battery core 10 may be a wound battery core. In this case, multiple first monolithic pole piece layers 1111 of the first monolithic pole piece layer 1111 are connected to form an integral first monolithic pole piece layer 1111; or, The battery core 10 may be a laminated battery core. In this case, the plurality of first monolithic pole piece layers 1111 of the first monolithic pole piece layer 1111 are independently provided.

第一极片111包括多个层叠设置的第一单片极片层1111,第一极耳12包括多个层叠设置的第一单片极耳层121。如图5所示,第一单片极耳层121由第一单片极片层1111上延伸而出,而第一单片极耳层121的总数量可以小于第一单片极片层1111的总数量,即至少一个第一单片极片层1111上可以不引出有第一单片极耳层121,相比于全极耳结构,可以降低多个第一单片极耳层121形成的第一极耳12的厚度,且第一单片极片层1111之间发生错层的几率就会降低。The first pole piece 111 includes a plurality of first monolithic pole piece layers 1111 arranged in a stack, and the first tab 12 includes a plurality of first monolithic tab layers 121 arranged in a stack. As shown in FIG. 5 , the first monolithic tab layer 121 extends from the first monolithic tab layer 1111 , and the total number of the first monolithic tab layer 121 may be less than the first monolithic tab layer 1111 The total number, that is, the first monolithic tab layer 121 may not be drawn from at least one first monolithic tab layer 1111. Compared with the full tab structure, the formation of multiple first monolithic tab layers 121 can be reduced. The thickness of the first pole tab 12 is reduced, and the probability of mis-layering between the first monolithic pole piece layers 1111 will be reduced.

而通过使得第一单片极耳层121的总数量与第一单片极片层1111的总数量之比为0.31-0.92,不仅可以降低第一单片极片层1111之间发生错层的几率,第一极耳12弯折整体厚度降低,使得电池内部空间利用率较高。By making the ratio of the total number of the first monolithic tab layers 121 to the total number of the first monolithic pole piece layers 1111 be 0.31-0.92, the possibility of mis-layering between the first monolithic pole piece layers 1111 can be reduced. Chances are, the overall thickness of the first pole lug 12 is reduced when bent, making the internal space utilization of the battery higher.

第一单片极耳层121的总数量与第一单片极片层1111的总数量之比可以为0.31、0.32、0.35、0.38、0.4、0.41、0.42、0.45、0.48、0.5、0.51、0.52、0.55、0.58、0.6、0.61、0.62、0.65、0.68、0.7、0.71、0.72、0.75、0.78、0.8、0.81、0.82、0.85、0.88、0.9、0.91或者0.92等等。The ratio of the total number of the first monolithic tab layer 121 to the total number of the first monolithic pole piece layer 1111 may be 0.31, 0.32, 0.35, 0.38, 0.4, 0.41, 0.42, 0.45, 0.48, 0.5, 0.51, 0.52 , 0.55, 0.58, 0.6, 0.61, 0.62, 0.65, 0.68, 0.7, 0.71, 0.72, 0.75, 0.78, 0.8, 0.81, 0.82, 0.85, 0.88, 0.9, 0.91 or 0.92, etc.

结合图1所示,壳体20包括盖板21和壳体件22,盖板21和壳体件22相连接,由此实现对电芯10的收纳。As shown in FIG. 1 , the case 20 includes a cover plate 21 and a case part 22 . The cover plate 21 and the case part 22 are connected, thereby realizing the storage of the battery core 10 .

壳体件22包括侧壁段221和底壁段222,侧壁段221和底壁段222为一体成型式结构,不仅可以保证侧壁段221和底壁段222的结构强度,且可以保证侧壁段221和底壁段222的成型效率,进而来控制电池的制造效率。The shell member 22 includes a side wall section 221 and a bottom wall section 222. The side wall section 221 and the bottom wall section 222 are an integral structure, which not only ensures the structural strength of the side wall section 221 and the bottom wall section 222, but also ensures the side wall section 221 and the bottom wall section 222. The forming efficiency of the wall section 221 and the bottom wall section 222 further controls the manufacturing efficiency of the battery.

盖板21与侧壁段221相连接,例如,盖板21与侧壁段221可以焊接连接,盖板21与侧壁段221可以采用激光焊接、电阻焊接或者超声焊接等等。The cover plate 21 and the side wall section 221 are connected. For example, the cover plate 21 and the side wall section 221 can be welded. The cover plate 21 and the side wall section 221 can be connected by laser welding, resistance welding or ultrasonic welding.

结合图1所示,极柱结构30设置于底壁段222上,而底壁段222可以与盖板21相对设置,在电池成组时,可以使得极柱结构30朝向电池箱体的顶端,此时,盖板21可以形成对电芯10的支撑,当然,不排除极柱结构30可以朝向电池箱体的底端。As shown in FIG. 1 , the pole structure 30 is disposed on the bottom wall segment 222 , and the bottom wall segment 222 can be disposed opposite to the cover 21 . When the batteries are grouped, the pole structure 30 can be directed toward the top of the battery box. At this time, the cover plate 21 can form a support for the battery core 10. Of course, it is not ruled out that the pole structure 30 can face the bottom end of the battery box.

在一个实施例中,电芯10为卷绕式电芯,不仅可以有效控制电芯10的成型效率,提高电池制造的效率,且可以第一单片极耳层121的总数量可以小于第一单片极片层1111的总数量时,也可以使得电芯10充分发挥电性能。In one embodiment, the battery core 10 is a wound battery core, which not only can effectively control the molding efficiency of the battery core 10 and improve the efficiency of battery manufacturing, but also allows the total number of the first monolithic tab layer 121 to be smaller than the first When the total number of single pole piece layers 1111 is reduced, the battery core 10 can fully exert its electrical performance.

电芯10可以为方形电芯,卷绕形成电芯10之后,可以将电芯10进行压扁处理,从而形成了方形电芯,此时,第一极片111包括多个层叠设置的第一单片极片层1111,相邻的第一单片极片层1111之间相连接,而第一极耳12包括多个层叠设置的第一单片极耳层121,相邻第一单片极耳层121可以连接,或者,相邻第一单片极耳层121可以不相连接。The battery core 10 may be a square battery core. After being rolled to form the battery core 10, the battery core 10 may be flattened to form a square battery core. At this time, the first pole piece 111 includes a plurality of stacked first electrodes. The monolithic pole piece layer 1111 and the adjacent first monolithic pole piece layers 1111 are connected, and the first tab 12 includes a plurality of first monolithic tab layers 121 arranged in a stack. The tab layers 121 may be connected, or adjacent first monolithic tab layers 121 may not be connected.

在一个实施例中,电芯主体11延伸出第一极耳12的端面114具有沿第一方向延伸的中心线,第一极耳12关于中心线非对称地设置,第一方向平行于拉直之后的第一单片极耳层121,即第一极耳12可以偏置设置,从而可以方便实现第一极耳12的收束,且降低第一极耳12的第一单片极耳层121出现错层的几率。In one embodiment, the end surface 114 of the cell body 11 extending from the first tab 12 has a centerline extending along a first direction. The first tab 12 is arranged asymmetrically with respect to the centerline, and the first direction is parallel to the straightening direction. The subsequent first monolithic tab layer 121 , that is, the first tab 12 can be offset, thereby facilitating the convergence of the first tab 12 and lowering the first monolithic tab layer of the first tab 12 121The probability of misalignment.

结合图4所示,第一方向可以表示为A,而电芯主体11的端面114可以具有平行于第一方向的中心线,此时,第一极耳12关于中心线非对称地设置,即表示第一极耳12可以偏向中心线的某一侧设置,如图4所示,第一极耳12整体偏置。As shown in FIG. 4 , the first direction can be represented as A, and the end surface 114 of the cell body 11 can have a center line parallel to the first direction. At this time, the first tab 12 is arranged asymmetrically with respect to the center line, that is, It means that the first pole tab 12 can be arranged to a certain side of the center line. As shown in FIG. 4 , the first pole tab 12 is biased as a whole.

第一极耳12由多个第一单片极耳层121形成,将第一单片极耳层121拉直之后,可以认为第一单片极耳层121具有一个平整的大表面,此时,第一方向平行于第一单片极耳层121。第一方向也可以认为是端面114的长度方向。The first tab 12 is formed by a plurality of first monolithic tab layers 121. After the first monolithic tab layer 121 is straightened, it can be considered that the first monolithic tab layer 121 has a large flat surface. At this time , the first direction is parallel to the first monolithic tab layer 121 . The first direction can also be considered as the length direction of the end surface 114 .

在一个实施例中,极柱结构30上设置有通孔31,第一极耳12与端面114相连接区域的至少部分与通孔31正对设置,从而可以通过极柱结构30的通孔31能够形成对第一极耳12的定位,由此来提高第一极耳12的连接精准度,进而来提高电池的制造效率。In one embodiment, the pole structure 30 is provided with a through hole 31 , and at least part of the area connecting the first pole lug 12 and the end surface 114 is disposed directly opposite the through hole 31 , so that the through hole 31 of the pole structure 30 can pass through. The positioning of the first tab 12 can be achieved, thereby improving the connection accuracy of the first tab 12 and thus improving the manufacturing efficiency of the battery.

第一极耳12与端面114相连接区域,即可以认为是各个第一单片极耳层121与相应的第一单片极片层1111相连接的根部形成的区域,通过使得第一极耳12与端面114相连接区域的至少部分与通孔31正对设置,由此可以通过通孔31形成对第一极耳12的定位,例如,方便实现第一极耳12穿设于通孔31内,或者,通过通孔31形成对第一极耳12和极柱结构30的电连接等等。The area where the first tab 12 is connected to the end surface 114 can be considered as the area formed by the root portion connecting each first monolithic tab layer 121 to the corresponding first monolithic tab layer 1111. By making the first tab At least part of the area connecting 12 to the end surface 114 is disposed directly opposite the through hole 31, so that the first tab 12 can be positioned through the through hole 31. For example, it is convenient to realize that the first tab 12 is inserted into the through hole 31. or, through the through hole 31 to form an electrical connection to the first tab 12 and the pole structure 30, etc.

在一个实施例中,多个第一单片极耳层121中距离端面114沿第一方向延伸的中心线最远的第一单片极耳层121拉直之后与通孔31正对设置,从而可以使得位于端部的第一单片极耳层121能够与通孔31正对设置,不仅可以提高对第一极耳12的定位能力,也可以方便地实现对第一极耳12的连接。In one embodiment, the first single-piece tab layer 121 among the plurality of first single-piece tab layers 121 that is farthest from the center line extending along the first direction of the end surface 114 is straightened and disposed directly opposite the through hole 31, As a result, the first monolithic tab layer 121 located at the end can be arranged directly opposite the through hole 31, which not only improves the positioning ability of the first tab 12, but also facilitates the connection to the first tab 12. .

第一极耳12与端面114相连接区域可以认为是一个矩形面,而端面114具有沿第一方向A延伸的中心线,此时,矩形面沿着垂直于第一方向A的第二方向上,距离中心线最远的边可以认为是由多个第一单片极耳层121中距离端面114沿第一方向延伸的中心线最远的第一单片极耳层121形成的,而该第一单片极耳层121拉直之后与通孔31正对设置,即距离中心线最远的边与通孔31正对设置。The area connecting the first tab 12 and the end surface 114 can be considered as a rectangular surface, and the end surface 114 has a center line extending along the first direction A. At this time, the rectangular surface extends along the second direction perpendicular to the first direction A. , the side farthest from the centerline can be considered to be formed by the first single-chip tab layer 121 that is farthest from the centerline extending along the first direction of the end surface 114 among the plurality of first monolithic tab layers 121, and this After being straightened, the first single-piece tab layer 121 is arranged to face the through hole 31 , that is, the side farthest from the center line is arranged to face the through hole 31 .

在一个实施例中,如图1所示,多个第一单片极耳层收拢后形成第一极耳12,且第一极耳12穿设于通孔31内,从而可以使得通孔31形成了对第一极耳12的限位,方便极柱结构30与第一极耳12形成电连接。In one embodiment, as shown in FIG. 1 , a plurality of first monolithic tab layers are gathered together to form a first tab 12 , and the first tab 12 is inserted into the through hole 31 , so that the through hole 31 The first pole lug 12 is limited to facilitate the electrical connection between the pole structure 30 and the first pole lug 12 .

在一个实施例中,如图1和图2所示,极柱结构30上设置有通孔31,第一极耳12穿设于通孔31内,不仅可以方便地实现极柱结构30与第一极耳12的电连接,且可以提高电芯10的安装效率,使得第一极耳12形成了电芯10的安装定位。In one embodiment, as shown in Figures 1 and 2, the pole structure 30 is provided with a through hole 31, and the first pole lug 12 is inserted into the through hole 31, which not only facilitates the connection between the pole structure 30 and the third The electrical connection of the first tab 12 can improve the installation efficiency of the battery core 10, so that the first tab 12 forms the installation position of the battery core 10.

第一极耳12可以与极柱结构30直接相连接,如图2所示。The first pole lug 12 may be directly connected to the pole structure 30, as shown in FIG. 2 .

第一极耳12穿设于通孔31内,第一极耳12可以与极柱结构30焊接连接,The first pole lug 12 is inserted into the through hole 31, and the first pole lug 12 can be welded to the pole structure 30.

在一个实施例中,如图3所示,极柱结构30上设置有通孔31,电池还包括转接件40,转接件40连接于第一极耳12远离电芯主体11的一侧,转接件40穿设于通孔31内,并与极柱结构30电连接,转接件40的设置可以适当降低第一极耳12的尺寸,并且有利于电芯10与极柱结构30形成连接,也可以方便控制转接件40穿设于通孔31内。In one embodiment, as shown in FIG. 3 , the pole structure 30 is provided with a through hole 31 , and the battery also includes an adapter 40 . The adapter 40 is connected to the side of the first tab 12 away from the cell body 11 , the adapter 40 is disposed in the through hole 31 and is electrically connected to the pole structure 30. The arrangement of the adapter 40 can appropriately reduce the size of the first pole 12, and is beneficial to the battery core 10 and the pole structure 30. To form a connection, it is also convenient to control the adapter 40 to be inserted into the through hole 31 .

第一极耳12与转接件40可以是采用焊接连接,或者,第一极耳12与转接件40可以是采用导电胶进行连接,此处不作限定。The first tab 12 and the adapter 40 may be connected by welding, or the first tab 12 and the adapter 40 may be connected by conductive glue, which is not limited here.

转接件40与极柱结构30可以焊接连接。The adapter 40 and the pole structure 30 can be connected by welding.

在一个实施例中,通孔31设置于极柱结构30的中部,从而可以使得极柱结构30形成对第一极耳12的有效限位,避免第一极耳12脱离极柱结构30。In one embodiment, the through hole 31 is provided in the middle of the pole structure 30 , so that the pole structure 30 can effectively limit the first pole tab 12 and prevent the first pole tab 12 from being separated from the pole structure 30 .

在一个实施例中,通孔31设置于极柱结构30的中心区域,不仅可以保证极柱结构30与第一极耳12的连接稳定性,且可以有效控制极柱结构30的结构强度,避免极柱结构30过流能力不作,而出现局部熔断的问题。In one embodiment, the through hole 31 is provided in the central area of the pole structure 30, which not only ensures the stability of the connection between the pole structure 30 and the first pole 12, but also effectively controls the structural strength of the pole structure 30 to avoid The pole structure 30 does not have the overcurrent capability, and the problem of partial fusing occurs.

需要说明的是,第一极耳12穿设于通孔31内,如果,第一极耳12的厚度过大,第一极耳12穿设于通孔31的难度较大,不利于提高安装效率,且第一极耳12的厚度过大时,通孔31的宽度也会相对较大,一定程度上会影响到极柱结构30的过流能力,通过使得第一单片极耳层121的总数量与第一单片极片层1111的总数量之比为0.31-0.92,可以有效控制第一极耳12的厚度,进而可靠提高电池的制造效率和安全性能。It should be noted that the first pole tab 12 is inserted into the through hole 31. If the thickness of the first pole tab 12 is too large, it will be difficult to penetrate the first pole tab 12 into the through hole 31, which is not conducive to improving the installation. efficiency, and when the thickness of the first tab 12 is too large, the width of the through hole 31 will also be relatively large, which will affect the overcurrent capability of the pole structure 30 to a certain extent. By making the first monolithic tab layer 121 The ratio of the total number to the total number of the first monolithic electrode layer 1111 is 0.31-0.92, which can effectively control the thickness of the first tab 12, thereby reliably improving the manufacturing efficiency and safety performance of the battery.

在一个实施例中,如图4所示,电芯10还包括第二极耳13,第一极耳12和第二极耳13由电芯主体11的同一端延伸而出,从而可以降低电芯10的整体高度,有利于提高电池的空间利用率,从而来控制电池的能量密度。In one embodiment, as shown in FIG. 4 , the battery core 10 further includes a second tab 13 . The first tab 12 and the second tab 13 extend from the same end of the battery core body 11 , thereby reducing the electric charge. The overall height of the core 10 is conducive to improving the space utilization of the battery, thereby controlling the energy density of the battery.

需要说明的是,在某些实施例中,不排除第一极耳12和第二极耳13可以由电芯主体11的相对两端延伸而出。It should be noted that in some embodiments, it is not excluded that the first tab 12 and the second tab 13 may extend from opposite ends of the cell body 11 .

在一个实施例中,电池可以为四棱柱型电池,四棱柱型电池主要是指外形为棱柱形状,但不严格限定棱柱每条边是否一定为严格意义的直线,边与边之间的拐角不一定为直角,可以为圆弧过渡。In one embodiment, the battery may be a four-prism battery. A four-prism battery mainly refers to a prismatic battery, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not strictly limited. It must be a right angle, and it can be an arc transition.

电池可以为叠片式电池,不仅成组方便,且可以加工得到长度较长的电池。具体的,电芯为叠片式电芯,电芯具有相互层叠的第一极片、与第一极片电性相反的第二极片以及设置在第一极片和第二极片之间的隔膜片,从而使得多对第一极片和第二极片堆叠形成叠片式电芯。The battery can be a stacked battery, which is not only convenient for grouping, but also can be processed to obtain a longer battery. Specifically, the battery core is a laminated battery core. The battery core has first pole pieces stacked on each other, a second pole piece electrically opposite to the first pole piece, and is arranged between the first pole piece and the second pole piece. diaphragm pieces, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery core.

或者,电池可以为卷绕式电池,即将第一极片、与第一极片电性相反的第二极片以及设置在第一极片和第二极片之间的隔膜片进行卷绕,得到卷绕式电芯。Alternatively, the battery may be a wound battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the separator sheet disposed between the first pole piece and the second pole piece are rolled, Get the wound battery core.

在一个实施例中,电池可以为圆柱电池,或者,电池可以为六棱柱型电池。电池可以为卷绕式电池,即将第一极片、与第一极片电性相反的第二极片以及设置在第一极片和第二极片之间的隔膜片进行卷绕,得到卷绕式电芯。In one embodiment, the battery may be a cylindrical battery, or the battery may be a hexagonal prismatic battery. The battery may be a rolled battery, that is, the first pole piece, the second pole piece electrically opposite to the first pole piece, and the separator piece disposed between the first pole piece and the second pole piece are rolled to obtain a rolled battery. Wound battery core.

本实用新型的一个实施例还提供了一种电池组,包括上述的电池。One embodiment of the present invention also provides a battery pack, including the above-mentioned battery.

本实用新型一个实施例的电池组的电池包括电芯10、壳体20以及极柱结构30,极柱结构30与电芯10电连接,壳体20包括盖板21和壳体件22,壳体件22的侧壁段221和底壁段222为一体成型式结构,极柱结构30设置于底壁段222上,由此合理利用壳体件22的空间,提高壳体20的结构稳定性。而电芯10包括电芯主体11和第一极耳12,电芯主体11的第一极片111由多个层叠设置的第一单片极片层1111形成,第一极耳12由多个层叠设置的第一单片极耳层121形成,通过使得第一单片极耳层121由第一单片极片层1111上延伸而出,且第一单片极耳层121的总数量与第一单片极片层1111的总数量之比为0.31-0.92,即第一单片极耳层121的总数量小于第一单片极片层1111的总数量,不仅可以降低第一单片极耳层121收束后错层的风险,且在保证第一极耳12过流能力的基础上,第一极耳12整体厚度不会太大,进而来提高电池内部空间利用率,从而可靠改善电池组的使用性能。The battery pack of an embodiment of the present invention includes a battery core 10, a casing 20 and a pole structure 30. The pole structure 30 is electrically connected to the battery core 10. The casing 20 includes a cover 21 and a casing member 22. The side wall section 221 and the bottom wall section 222 of the body part 22 are integrally formed structures, and the pole structure 30 is arranged on the bottom wall section 222, thereby rationally utilizing the space of the housing part 22 and improving the structural stability of the housing 20 . The battery core 10 includes a battery core body 11 and a first pole piece 12. The first pole piece 111 of the battery core body 11 is formed by a plurality of first monolithic pole piece layers 1111 arranged in a stack. The first pole piece 12 is composed of a plurality of stacked first pole piece layers 1111. The stacked first monolithic tab layer 121 is formed by making the first monolithic tab layer 121 extend from the first monolithic tab layer 1111 , and the total number of the first monolithic tab layer 121 is equal to The ratio of the total number of first monolithic pole piece layers 1111 is 0.31-0.92, that is, the total number of first monolithic tab layers 121 is less than the total number of first monolithic pole piece layers 1111, which not only reduces the The risk of mis-layering after the tab layer 121 is closed, and on the basis of ensuring the over-current capability of the first tab 12, the overall thickness of the first tab 12 will not be too large, thereby improving the internal space utilization of the battery, thereby ensuring reliability Improve battery pack performance.

在一个实施例中,电池组为电池模组或电池包。In one embodiment, the battery pack is a battery module or battery pack.

电池模组包括多个电池,电池模组还可以包括端板和侧板,端板和侧板用于固定多个电池。The battery module includes a plurality of batteries, and the battery module may also include an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of batteries.

需要说明的是,多个电池可以形成电池模组后设置在电池箱体内,多个电池可以通过端板和侧板进行固定。多个电池可以直接设置在电池箱体内,即无需对多个电池进行成组,此时,可以去除端板和侧板。It should be noted that multiple batteries can be formed into a battery module and placed in the battery box, and the multiple batteries can be fixed through end plates and side plates. Multiple batteries can be directly installed in the battery box, that is, there is no need to group multiple batteries. At this time, the end plates and side plates can be removed.

本领域技术人员在考虑说明书及实践这里公开的实用新型创造后,将容易想到本公开的其它实施方案。本公开旨在涵盖本实用新型的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和示例实施方式仅被视为示例性的,本公开的真正范围和精神由所附的权利要求指出。Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present disclosure and include common knowledge or customary techniques in the technical field that are not disclosed in the present disclosure. means. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

应当理解的是,本公开并不局限于上面已经描述并在附图中示出的精确结构,并且可以在不脱离其范围进行各种修改和改变。本公开的保护范围仅由所附的权利要求来限制。It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (12)

1. A battery, comprising:
the battery cell (10), the battery cell (10) comprises a battery cell main body (11) and a first tab (12), the battery cell main body (11) comprises a first pole piece (111), the first tab (12) extends out from the first pole piece (111), the first pole piece (111) comprises a plurality of first single-piece pole piece layers (1111) which are arranged in a stacked mode, the first tab (12) comprises a plurality of first single-piece pole piece layers (121) which are arranged in a stacked mode, the first single-piece pole piece layers (121) extend out from the first single-piece pole piece layers (1111), and the ratio of the total number of the first single-piece pole piece layers (121) to the total number of the first single-piece pole piece layers (1111) is 0.31-0.92;
the battery cell (10) is arranged in the shell (20), the shell (20) comprises a cover plate (21) and a shell piece (22), the shell piece (22) comprises a side wall section (221) and a bottom wall section (222), the side wall section (221) and the bottom wall section (222) are of an integrally formed structure, the cover plate (21) is connected with the side wall section (221), and the cover plate (21) is arranged opposite to the bottom wall section (222);
and the pole column structure (30) is arranged on the bottom wall section (222) and is electrically connected with the battery cell (10).
2. The battery according to claim 1, characterized in that the cell (10) is a wound cell.
3. The battery according to claim 1, characterized in that the end face (114) of the cell body (11) from which the first tab (12) extends has a center line extending in a first direction, the first tab (12) being asymmetrically arranged about the center line, the first direction being parallel to the first monolithic tab layer (121) after straightening.
4. A battery according to claim 3, wherein the post structure (30) is provided with a through hole (31), and at least a part of the area where the first tab (12) is connected to the end face (114) is disposed opposite to the through hole (31).
5. The battery according to claim 4, wherein the first one-piece tab layer (121) of the plurality of first one-piece tab layers (121) that is farthest from a center line of the end face (114) extending in the first direction is disposed directly opposite the through hole (31) after being straightened.
6. The battery according to claim 5, wherein the plurality of first single tab layers are folded to form the first tab (12), and the first tab (12) is disposed in the through hole (31).
7. The battery according to claim 1, wherein a through hole (31) is provided in the post structure (30), and the first tab (12) is inserted into the through hole (31).
8. The battery according to claim 1, wherein the post structure (30) is provided with a through hole (31), the battery further comprises an adapter (40), the adapter (40) is connected to one side of the first tab (12) away from the cell main body (11), and the adapter (40) is inserted into the through hole (31) and is electrically connected with the post structure (30).
9. The battery according to any one of claims 4 to 8, characterized in that the through hole (31) is provided in the middle of the post structure (30).
10. The battery according to claim 9, characterized in that the through hole (31) is provided in a central region of the post structure (30).
11. The battery according to any one of claims 1 to 8, wherein the battery is a quadrangular-type battery.
12. The battery according to any one of claims 1 to 8, wherein the cell (10) further comprises a second tab (13), the first tab (12) and the second tab (13) extending from the same end of the cell body (11).
CN202322149453.8U 2023-08-10 2023-08-10 Battery Active CN220544183U (en)

Priority Applications (1)

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CN202322149453.8U CN220544183U (en) 2023-08-10 2023-08-10 Battery

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CN202322149453.8U CN220544183U (en) 2023-08-10 2023-08-10 Battery

Publications (1)

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CN220544183U true CN220544183U (en) 2024-02-27

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