WO2025167243A1 - 顶盖支架、顶盖组件和电池 - Google Patents

顶盖支架、顶盖组件和电池

Info

Publication number
WO2025167243A1
WO2025167243A1 PCT/CN2024/131786 CN2024131786W WO2025167243A1 WO 2025167243 A1 WO2025167243 A1 WO 2025167243A1 CN 2024131786 W CN2024131786 W CN 2024131786W WO 2025167243 A1 WO2025167243 A1 WO 2025167243A1
Authority
WO
WIPO (PCT)
Prior art keywords
top cover
buffer groove
battery
wall segment
injection hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/131786
Other languages
English (en)
French (fr)
Inventor
于东朋
王聪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Geely Holding Group Co Ltd
Zhejiang Zeekr Intelligent Technology Co Ltd
Viridi eMobility Technology Ningbo Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Zhejiang Zeekr Intelligent Technology Co Ltd
Viridi eMobility Technology Ningbo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Geely Holding Group Co Ltd, Zhejiang Zeekr Intelligent Technology Co Ltd, Viridi eMobility Technology Ningbo Co Ltd filed Critical Zhejiang Geely Holding Group Co Ltd
Publication of WO2025167243A1 publication Critical patent/WO2025167243A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular to a top cover bracket, a top cover assembly and a battery.
  • a lithium battery typically consists of a housing, bare cells, and a top cover assembly.
  • the bare cells are located within the housing, and the top cover assembly is located at the housing opening to achieve sealing and electrical connection to the bare cells.
  • the top cover assembly includes a plain aluminum sheet and a plastic bracket.
  • the plastic bracket is located on the inner surface of the plain aluminum sheet.
  • the plain aluminum sheet has an injection hole, and the plastic bracket has a corresponding liquid passage hole. Electrolyte can be injected into the housing through this injection hole and the liquid passage hole.
  • the existing top cover assembly's injection and liquid-pass holes are simple through-hole structures, causing the electrolyte to directly impact the bare cell during injection.
  • the electrolyte can impact the bare cell's diaphragm, leading to electrode overlap and short circuits in severe impacts.
  • the main purpose of this application is to provide a top cover bracket, which aims to weaken the impact of electrolyte injection on the bare battery cell, thereby improving the production yield of the battery.
  • the top cover bracket proposed in this application is applied to a battery, wherein the battery is provided with a liquid injection hole, and the top cover bracket comprises:
  • bracket plate having opposing first and second surfaces
  • the first convex portion is protruding from the first surface
  • the top cover bracket is provided with a buffer groove and a liquid hole that at least passes through the side wall of the buffer groove
  • the buffer groove is partially provided on the first convex portion and the groove opening passes through the second surface
  • the bottom wall of the buffer groove is arranged opposite to the liquid injection hole.
  • the first surface is the inner surface of the support plate and is arranged close to the bare cell of the battery.
  • the side wall of the buffer tank includes a first wall segment and a second wall segment. The first wall segment is connected between the second wall segment and the support plate, and the second wall segment is connected to the bottom wall of the buffer tank.
  • the first wall segments are arranged gradually closer to the center in a direction approaching the second wall segment.
  • the angle between the first wall segment and the central axis of the buffer groove is 110° to 160°.
  • the liquid-through hole penetrates both the second wall section and the bottom wall of the buffer tank.
  • the ratio of the height of the liquid-passing hole to the depth of the buffer tank is 30% to 70%.
  • a plurality of the liquid passage holes are provided, and the plurality of the liquid passage holes are distributed at intervals along the circumference of the buffer tank.
  • the top cover bracket further includes a second protrusion protruding from the first surface, the inner surface of the second protrusion protrudes from the inner surface of the first protrusion and is used to abut against the bare battery cell.
  • the notch of the buffer groove is arranged opposite to the injection hole, and the width of the notch of the buffer groove is greater than the diameter of the injection hole.
  • the present application also proposes a top cover assembly, comprising a top cover body and the aforementioned top cover bracket, wherein the top cover bracket is arranged on the top cover body, and the top cover body is provided with a liquid injection hole.
  • the present application also proposes a battery, comprising a shell, a bare cell and the aforementioned top cover assembly, wherein the shell has an installation cavity and an installation opening connected to the installation cavity, the bare cell is arranged in the installation cavity, and the top cover assembly is sealed on the installation opening.
  • the battery further includes a sealing pin, which is inserted into the liquid injection hole and has an end portion extending into the buffer groove, and a bottom wall of the buffer groove is arranged opposite to the sealing pin.
  • the top cover bracket is provided with a buffer groove and a liquid hole corresponding to the injection hole.
  • the electrolyte When the electrolyte is injected into the installation cavity through the injection hole, the electrolyte will be blocked by the bottom wall of the buffer groove opposite to the injection hole and cannot flow directly into the installation cavity. Instead, it flows through the liquid hole located on the side wall of the buffer groove before it can flow into the installation cavity. In this way, it can avoid the electrolyte directly impacting the bare battery cell and the problem of electrode overlap and short circuit in severe impact, thereby improving the production yield of the battery.
  • FIG1 is a schematic structural diagram of an embodiment of a top cover assembly of the present application.
  • FIG2 is a bottom view of the top cover bracket in FIG1 ;
  • FIG3 is a cross-sectional view of the top cover bracket shown in FIG2 ;
  • FIG4 is a partial enlarged view of point A in FIG3 ;
  • FIG5 is a cross-sectional view of another embodiment of the top cover bracket of the present application.
  • connection and “fixation” should be understood in a broad sense.
  • fixing can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified.
  • fixation can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified.
  • a lithium battery typically consists of a housing, bare cells, and a top cover assembly.
  • the bare cells are located within the housing, and the top cover assembly is located at the housing opening to achieve sealing and electrical connection to the bare cells.
  • the top cover assembly includes a plain aluminum sheet and a plastic bracket.
  • the plastic bracket is located on the inner surface of the plain aluminum sheet.
  • the plain aluminum sheet has an injection hole, and the plastic bracket has a corresponding liquid passage hole. Electrolyte can be injected into the housing through this injection hole and the liquid passage hole.
  • the existing top cover assembly's injection and liquid-pass holes are simple through-hole structures, causing the electrolyte to directly impact the bare cell during injection.
  • the electrolyte can impact the bare cell's diaphragm, leading to electrode overlap and short circuits in severe impacts.
  • the present application proposes a top cover bracket, which is applied to the top cover assembly of the battery.
  • the battery includes a shell and a bare cell.
  • the shell has an installation cavity and an installation opening connected to the installation cavity.
  • the bare cell is arranged in the installation cavity, and the top cover assembly is sealed on the installation opening; please refer to Figures 1 to 3.
  • the top cover assembly includes a top cover body 20, a pole 30 and a connecting piece (the structure of the connecting piece is not shown in the accompanying drawings, but the installation position of the connecting piece is indicated by a hatched line in Figure 2).
  • One end of the pole 30 is exposed on the outer surface of the top cover assembly.
  • the connecting piece is arranged on the inner surface of the top cover bracket 10 and is used to connect the pole 30 and the bare cell.
  • the top cover body 20 is provided with a liquid injection hole 21, and the top cover bracket 10 is arranged on the inner surface of the top cover body 20.
  • the top cover bracket 10 includes:
  • a support plate 11 having a first surface and a second surface opposite to each other;
  • the first protrusion 12 is protruding from the first surface of the bracket plate 11.
  • the top cover bracket 10 is provided with a buffer groove 14 and a liquid hole 15 that at least passes through the side wall of the buffer groove 14.
  • the buffer groove 14 is partially provided on the first protrusion 12 and the groove opening passes through the second surface of the bracket plate 11.
  • the bottom wall of the buffer groove 14 is arranged opposite to the liquid injection hole 21.
  • the top cover bracket 10 is provided with a buffer groove 14 and a liquid flow hole 15 corresponding to the liquid injection hole 21.
  • the electrolyte When the electrolyte is injected into the installation cavity through the liquid injection hole 21, the electrolyte will be blocked by the bottom wall of the buffer groove 14 opposite the liquid injection hole 21 and cannot flow directly into the installation cavity. Instead, it flows through the liquid flow hole 15 located on the side wall of the buffer groove 14 before flowing into the installation cavity. This can prevent the electrolyte from directly impacting the bare battery cell, which could cause electrode overlap and short circuit in severe impact, thereby improving the production yield of the battery.
  • the first surface is the inner surface of the bracket plate 11 and is disposed near the bare cells of the battery. That is, the first protrusion 12 is disposed on the inner surface of the bracket plate 11, and the notch of the buffer groove 14 passes through the outer surface of the bracket plate 11 and is disposed facing the injection hole 21. In this way, the first protrusion 12 can utilize the space of the mounting cavity without occupying the external space of the top cover bracket 10, which is beneficial for reducing the outer contour size and volume of the battery.
  • the electrolyte when the electrolyte is injected into the mounting cavity through the injection hole 21, the electrolyte will first flow into the buffer groove 14 through the notch of the buffer groove 14, and will be blocked by the bottom wall of the buffer groove 14, and will turn to flow through the liquid hole 15, and finally flow into the mounting cavity through the liquid hole 15.
  • the second surface may be the inner surface of the support plate 11 and disposed proximate to the bare battery cells. That is, the first protrusion 12 may be disposed on the outer surface of the support plate 11, and the notch of the buffer tank 14 may extend through the inner surface of the support plate 11 and be disposed away from the injection hole 21.
  • the electrolyte when the electrolyte is injected into the mounting cavity through the injection hole 21, the electrolyte will first strike the bottom wall of the buffer tank 14, bypass the bottom wall of the buffer tank 14, flow through the liquid hole 15, and then flow into the buffer tank 14 through the liquid hole 15, and finally flow into the mounting cavity through the notch of the buffer tank 14.
  • the inner surface of the above-mentioned part or structure refers to the surface of the part or structure facing the installation cavity of the shell when the battery assembly production is completed.
  • the inner surface of the top cover bracket 10 is located in the installation cavity.
  • the connecting piece is provided with a clearance opening corresponding to the first protrusion 12 so that the connecting piece can be installed from the inside outward on the inner surface of the bracket plate 11.
  • the sidewalls of the buffer groove 14 include a first wall section 141 and a second wall section 142.
  • the first wall section 141 is connected between the second wall section 142 and the bracket plate 11, and the second wall section 142 is connected to the bottom wall of the buffer groove 14.
  • the first wall section 141 is arranged to gradually approach the center in the direction close to the second wall section 142. That is, in the direction in which the top cover assembly is installed into the installation opening, the cross-sectional width of the buffer groove 14 area defined by the first wall section 141 is gradually reduced. In this way, since the cross-sectional width of the second wall section 142 is smaller than the cross-sectional width of the first wall section 141, the second wall section 142 can avoid the connecting piece well during the installation process of the connecting piece, making it easier for the connecting piece to be installed on the inner surface of the bracket plate 11 from the inside to the outside, thereby improving the installation convenience of the connecting piece.
  • the cross-sections of the first wall section 141 and the second wall section 142 can be arranged to be the same, or the first wall section 141 can be arranged to gradually move away from the center in the direction close to the second wall section 142.
  • the angle between the first wall segment 141 and the central axis of the buffer tank 14 is ⁇ , and the value of ⁇ is 110° to 160°.
  • the angle ⁇ within this value range can enable the first wall segment 141 to play a better guiding role when the electrolyte is injected, thereby improving the smoothness of the flow of the electrolyte in the buffer tank 14. It can be understood that if the angle ⁇ is too small, the first wall segment 141 will play a great obstructive role when the electrolyte is injected, thereby significantly affecting the fluidity of the electrolyte. If the angle ⁇ is too large, the cross-sectional width of the first wall segment 141 changes slowly, which is not conducive to reducing the cross-sectional width of the second wall segment 142.
  • ⁇ is 130° to 150°.
  • the liquid passage hole 15 extends through both the second wall section 142 and the bottom wall of the buffer tank 14. This facilitates the processing and forming of the liquid passage hole 15, and the liquid passage hole 15 is closer to the bottom wall of the buffer tank 14, which facilitates smoother flow of electrolyte from the buffer tank 14 into the liquid passage hole 15 during injection.
  • the liquid passage hole 15 may be provided on the first wall section 141, or a portion of the liquid passage hole 15 may be provided on the first wall section 141 and the other portion may be provided on the second wall section 142.
  • the cross-sectional shape of the buffer tank 14 can be circular, elliptical, triangular, square, or other polygonal, and this application does not impose any specific limitation thereto.
  • the cross-sectional shape of the buffer tank 14 is triangular, three liquid-passing holes 15 are provided, and are respectively arranged corresponding to the three sides of the triangle.
  • the ratio of the height of the liquid-passing hole 15 to the depth of the buffer tank 14 is 30% to 70%. That is, the ratio of H1 to H2 shown in Figure 4 is 30% to 70%. Preferably, the ratio of the height of the liquid-passing hole 15 to the depth of the buffer tank 14 is 45% to 65%.
  • the top cover bracket 10 further includes a second protrusion 13 projecting from the first surface (i.e., inner surface) of the bracket plate 11.
  • the inner surface of the second protrusion 13 protrudes beyond the inner surface of the first protrusion 12 and is configured to abut against the bare cell. That is, in the direction in which the top cover assembly is inserted into the mounting opening, the inner surface of the second protrusion 13 is higher than the inner surface of the first protrusion 12. In this manner, the abutment of the second protrusion 13 against the bare cell enables positioning and restraining of the bare cell, allowing the bare cell to maintain its relative position within the mounting cavity.
  • the opening of the buffer tank 14 is positioned opposite the injection hole 21, and the width of the opening of the buffer tank 14 is greater than the diameter of the injection hole 21. This allows the electrolyte to flow more smoothly from the injection hole 21 into the buffer tank 14, thereby improving the smoothness and stability of the electrolyte flow.
  • the opening of the buffer tank 14 and the injection hole 21 may be spaced apart in the length direction of the top cover bracket 10 (i.e., the Y direction as shown in Figure 1), or the width of the opening of the buffer tank 14 may be less than or equal to the diameter of the injection hole 21.
  • the battery further includes a sealing pin (not shown in the drawings), which is sealingly inserted into the injection hole 21, and the end of the sealing pin extends into the buffer tank 14, and the bottom wall of the buffer tank 14 is arranged opposite to the sealing pin.
  • a sealing pin (not shown in the drawings), which is sealingly inserted into the injection hole 21, and the end of the sealing pin extends into the buffer tank 14, and the bottom wall of the buffer tank 14 is arranged opposite to the sealing pin.
  • This application also proposes a top cover assembly, which includes a top cover body and a top cover bracket.
  • the specific structure of the top cover bracket refers to the above-mentioned embodiment. Since this top cover assembly adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here.
  • the top cover bracket is provided on the top cover body, and the top cover body is provided with a liquid injection hole.
  • the top cover assembly includes a top cover body and a top cover bracket.
  • the specific structure of the top cover bracket refers to the above embodiment. Since this top cover assembly adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
  • the battery includes a housing and a bare cell, the housing has a mounting cavity and a mounting opening connected to the mounting cavity, the bare cell is arranged in the mounting cavity, and the top cover assembly is sealed on the mounting opening.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Filling, Topping-Up Batteries (AREA)

Abstract

本申请公开一种顶盖支架、顶盖组件和电池，其中，顶盖支架应用于电池，所述电池设有注液孔，所述顶盖支架包括支架板和第一凸部，所述支架板具有相对的第一表面和第二表面，所述第一凸部凸设在所述第一表面，所述顶盖支架设有缓冲槽、及至少贯穿所述缓冲槽的槽侧壁的过液孔，所述缓冲槽部分设在所述第一凸部且槽口贯穿所述第二表面，所述缓冲槽的槽底壁与所述注液孔相对设置。

Description

顶盖支架、顶盖组件和电池
本申请要求于2024年2月7日申请的、申请号为202420288200.0的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，特别涉及一种顶盖支架、顶盖组件和电池。
 背景技术
锂电池通常包括壳体、裸电芯和顶盖组件，其中，裸电芯设在壳体内部，顶盖组件设在壳体的开口处，以实现密封和电连接裸电芯。顶盖组件包括光铝片和塑胶支架，塑胶支架设在光铝片的内表面，光铝片设有注液孔，塑胶支架对应注液孔设有过液孔，电解液能够经由该注液孔和过液孔注入到壳体内部。
然而，现有顶盖组件的注液孔和过液孔均是简单的通孔结构，使得电解液注入时会直接冲击到裸电芯。特别地，当注液参数波动时，会出现电解液冲击裸电芯的隔膜，导致在冲击严重时发生极片搭接并短路的问题。
 技术问题
本申请的主要目的是提供一种顶盖支架，旨在削弱电解液注入时对裸电芯的冲击作用，从而提升电池的生产良品率。
 技术解决方案
为实现上述目的，本申请提出的顶盖支架，应用于电池，所述电池设有注液孔，所述顶盖支架包括：
支架板，具有相对的第一表面和第二表面；和
第一凸部，凸设在所述第一表面，所述顶盖支架设有缓冲槽、及至少贯穿所述缓冲槽的槽侧壁的过液孔，所述缓冲槽部分设在所述第一凸部且槽口贯穿所述第二表面，所述缓冲槽的槽底壁与所述注液孔相对设置。
在一个实施例中，所述第一表面为所述支架板的内表面并靠近所述电池的裸电芯设置，所述缓冲槽的槽侧壁包括第一壁段和第二壁段，所述第一壁段连接在所述第二壁段和所述支架板之间，所述第二壁段连接所述缓冲槽的槽底壁。
在一个实施例中，所述第一壁段在靠近所述第二壁段的方向上朝中心逐渐靠拢设置。
在一个实施例中，所述第一壁段与所述缓冲槽的中轴线之间的夹角为110°至160°。
在一个实施例中，所述过液孔同时贯穿所述第二壁段和所述缓冲槽的槽底壁。
在一个实施例中，所述过液孔的高度与所述缓冲槽的槽深的比值为30%至70%。
在一个实施例中，所述过液孔设有多个，多个所述过液孔沿所述缓冲槽的周向间隔分布。
在一个实施例中，所述顶盖支架还包括凸设在所述第一表面的第二凸部，所述第二凸部的内表面凸出于第一凸部的内表面，并用以抵接在所述裸电芯。
在一个实施例中，所述缓冲槽的槽口与所述注液孔相对设置，且所述缓冲槽的槽口宽度大于所述注液孔的孔径。
本申请还提出一种顶盖组件，包括顶盖本体、及前述的顶盖支架，所述顶盖支架设在所述顶盖本体，所述顶盖本体设有注液孔。
本申请还提出一种电池，包括壳体、裸电芯及前述的顶盖组件，所述壳体具有安装腔和连通所述安装腔的安装开口，所述裸电芯设在所述安装腔，所述顶盖组件封盖在所述安装开口。
在一个实施例中，所述电池还包括密封钉，所述密封钉插设在所述注液孔，且端部伸入所述缓冲槽，所述缓冲槽的槽底壁与所述密封钉相对设置。
 有益效果
本申请技术方案，顶盖支架对应注液孔设有缓冲槽和过液孔，在经由注液孔向安装腔注入电解液时，电解液会受到与注液孔相对的缓冲槽的槽底壁阻挡，而无法直接流入安装腔，转而流经位于缓冲槽的槽侧壁的过液孔，才能流入安装腔。如此，能够避免电解液直接冲击裸电芯，并在冲击严重时发生极片搭接并短路的问题，从而提升电池的生产良品率
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请顶盖组件一实施例的结构示意图；
图2为图1中顶盖支架的仰视图；
图3为图2所示顶盖支架的剖视图；
图4为图3中A处的局部放大图；
图5为本申请顶盖支架另一实施例的剖视图。
附图标号说明：
标号 名称 标号 名称
10 顶盖支架 142 第二壁段
11 支架板 15 过液孔
12 第一凸部 20 顶盖本体
13 第二凸部 21 注液孔
14 缓冲槽 30 极柱
141 第一壁段    
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，本申请实施例中所有方向性指示（诸如上、下、左、右、前、后……）仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
在本申请中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，全文中出现的“和/或”的含义，包括三个并列的方案，以“A和/或B”为例，包括A方案、或B方案、或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
锂电池通常包括壳体、裸电芯和顶盖组件，其中，裸电芯设在壳体内部，顶盖组件设在壳体的开口处，以实现密封和电连接裸电芯。顶盖组件包括光铝片和塑胶支架，塑胶支架设在光铝片的内表面，光铝片设有注液孔，塑胶支架对应注液孔设有过液孔，电解液能够经由该注液孔和过液孔注入到壳体内部。
然而，现有顶盖组件的注液孔和过液孔均是简单的通孔结构，使得电解液注入时会直接冲击到裸电芯。特别地，当注液参数波动时，会出现电解液冲击裸电芯的隔膜，导致在冲击严重时发生极片搭接并短路的问题。
鉴于此，本申请提出一种顶盖支架，应用于电池的顶盖组件，电池包括壳体和裸电芯，壳体具有安装腔和连通安装腔的安装开口，裸电芯设在安装腔，顶盖组件封盖在安装开口；请参照图1至图3，顶盖组件包括顶盖本体20、极柱30和连接片（附图中未示出连接片的结构，但在图2中用阴影线表示出连接片的安装位置），极柱30的一端显露在顶盖组件的外表面，连接片设于顶盖支架10的内表面并用以连接极柱30和裸电芯，顶盖本体20设有注液孔21，顶盖支架10设在顶盖本体20的内表面。
请参照图2至图4，在本申请一实施例中，该顶盖支架10包括：
支架板11，支架板11具有相对的第一表面和第二表面；和
第一凸部12，凸设在支架板11的第一表面，顶盖支架10设有缓冲槽14、及至少贯穿缓冲槽14的槽侧壁的过液孔15，缓冲槽14部分设在第一凸部12且槽口贯穿支架板11的第二表面，缓冲槽14的槽底壁与注液孔21相对设置。
本申请中，顶盖支架10对应注液孔21设有缓冲槽14和过液孔15，在经由注液孔21向安装腔注入电解液时，电解液会受到与注液孔21相对的缓冲槽14的槽底壁的阻挡，而无法直接流入安装腔，转而流经位于缓冲槽14的槽侧壁的过液孔15，才能流入安装腔。如此，能够避免电解液直接冲击裸电芯，并在冲击严重时发生极片搭接并短路的问题，从而提升电池的生产良品率。
在一个实施例中，请参照图3和图4，在一实施例中，第一表面为支架板11的内表面并靠近电池的裸电芯设置，也即，第一凸部12设在支架板11的内表面，且缓冲槽14的槽口贯穿支架板11的外表面并面向注液孔21设置。如此，第一凸部12能够利用安装腔的空间，而不占据顶盖支架10的外部空间，有利于缩小电池的外轮廓尺寸及体积。此时，由注液孔21向安装腔注入电解液时，电解液会先经缓冲槽14的槽口流入缓冲槽14，并受到缓冲槽14的槽底壁的阻挡，而转向流入过液孔15，最终经过液孔15流入安装腔。
当然，请参照图5，在另一实施例中，也可以是第二表面为支架板11的内表面并靠近电池的裸电芯设置，也即，第一凸部12设在支架板11的外表面，且缓冲槽14的槽口贯穿支架板11的内表面并背离注液孔21设置。此时，由注液孔21向安装腔注入电解液时，电解液会先撞击到缓冲槽14的槽底壁，并在绕过缓冲槽14的槽底壁后流入过液孔15，然后经过液孔15流入缓冲槽14内，最终经缓冲槽14的槽口流入安装腔。
需要说明的是，上述零件或结构的内表面指的是，在电池装配生产完成状态下，零件或结构朝向壳体的安装腔的表面，例如，顶盖支架10的内表面位于安装腔。
具体而言，连接片对应第一凸部12设有让位开口，以便连接片能沿自内朝外的方向安装在支架板11的内表面。在一个实施例中，缓冲槽14的槽侧壁包括第一壁段141和第二壁段142，第一壁段141连接在第二壁段142和支架板11之间，第二壁段142连接缓冲槽14的槽底壁。
在一个实施例中，第一壁段141在靠近第二壁段142的方向上朝中心逐渐靠拢设置。也即，在顶盖组件装入安装开口的方向上，第一壁段141所限定出的缓冲槽14区域的横截面宽度尺寸渐缩设置。如此，由于第二壁段142的横截面宽度尺寸小于第一壁段141的横截面宽度尺寸，第二壁段142在连接片的安装过程中能良好地避开连接片，便于连接片沿自内朝外的方向安装在支架板11的内表面，从而提升连接片的安装便捷性。当然，在其他实施例中，也可以是第一壁段141和第二壁段142的横截面相同设置，或者是第一壁段141在靠近第二壁段142的方向上朝中心逐渐远离设置。
在一个实施例中，第一壁段141与缓冲槽14的中轴线之间的夹角为β，且β取值为110°至160°。在该取值范围下的夹角β，能够使第一壁段141在电解液注入时起到较好的导向作用，从而提升电解液在缓冲槽14内的流动顺畅性。可以理解，若夹角β取值过小，则第一壁段141会在电解液注入时起到很大的阻碍作用，进而显著影响电解液的流动性。若夹角β取值过大，则第一壁段141的横截面宽度尺寸变化缓慢，不利于缩小第二壁段142的横截面宽度尺寸。优选地，β取值为130°至150°。
在一个实施例中，过液孔15同时贯穿第二壁段142和缓冲槽14的槽底壁。如此，便于过液孔15的加工成形，且过液孔15能更加靠近缓冲槽14的槽底壁，有利于电解液注入时能更顺畅地自缓冲槽14流入过液孔15。当然，在其他实施例中，也可以是过液孔15设在第一壁段141上，或者是过液孔15的一部分设在第一壁段141且另一部分设在第二壁段142。
在一个实施例中，过液孔15设有多个，多个过液孔15沿第二壁段142的周向间隔分布。如此，通过多个小孔径的过液孔15，能进一步分散和削弱电解液注入安装腔时的冲击力，从而有利于提升电解液的浸润效率。其中，图2所示实施例具有四个过液孔15，且均匀间隔分布，每个过液孔15所对应的圆心角大致为90°。当然，在其他实施例中，过液孔15也可以只设置一个或者两个。
具体而言，缓冲槽14的横截面形状可以是圆形、椭圆形、三角形、方形或其他多边形等，本申请对此不做具体限定。例如缓冲槽14的横截面形状为三角形的实施例中，过液孔15设有三个，并分别对应于三角形的三个边设置。
为了保证过液孔15具有较大的流通截面积，过液孔15的高度与缓冲槽14的槽深的比值为30%至70%。也即，图4所示的H1与H2的比值为30%至70%。优先地，过液孔15的高度与缓冲槽14的槽深的比值为45%至65%。
在一个实施例中，顶盖支架10还包括凸设在支架板11的第一表面（即内表面）的第二凸部13，第二凸部13的内表面凸出于第一凸部12的内表面，并用以抵接在裸电芯。也即，在顶盖组件装入安装开口的方向上，第二凸部13的内表面高于第一凸部12的内表面。如此，通过第二凸部13抵接在裸电芯能够实现对裸电芯的定位和限制作用，以使裸电芯能够保持在安装腔内的相对位置。其次，第一凸部12的内表面和裸电芯相间隔设置，使得电解液注入时作用在缓冲槽14的槽底壁的冲击力，不会直接传递至裸电芯，有利于维持裸电芯的位置稳定性。当然，在其他实施例中，也可以是第一凸部12的内表面和第二凸部13的内表面相平齐设置，或者是第一凸部12的内表面凸出于第二凸部13的内表面。
在一个实施例中，缓冲槽14的槽口与注液孔21相对设置，且缓冲槽14的槽口宽度大于注液孔21的孔径。如此，电解液能够更顺畅地自注液孔21流入缓冲槽14，从而提升电解液的流动平顺性及稳定性。当然，在其他实施例中，也可以是缓冲槽14的槽口和注液孔21在顶盖支架10的长度方向（即图1所示的Y方向）上相间隔设置，或者是缓冲槽14的槽口宽度小于或等于注液孔21的孔径。
在一个实施例中，电池还包括密封钉（附图中未示出），密封钉密封插设在注液孔21，且端部伸入缓冲槽14内，缓冲槽14的槽底壁与密封钉相对设置。如此，在电解液注入完成后，利用密封钉将注液孔21封堵住，并利用缓冲槽14的容积收容密封钉的端部，结构简单且易于实现。其次，由于缓冲槽14的槽底壁对齐密封钉，能够避免密封钉掉入壳体内部的问题发生。进一步，第二壁段142所对应的缓冲槽14宽度尺寸D≥1.5mm，例如D取值3mm或4mm。
本申请还提出一种顶盖组件，该顶盖组件包括顶盖本体和顶盖支架，该顶盖支架的具体结构参照上述实施例，由于本顶盖组件采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。其中，所述顶盖支架设在所述顶盖本体，所述顶盖本体设有注液孔。
本申请还提出一种电池，包括壳体、裸电芯及顶盖组件，顶盖组件包括顶盖本体和顶盖支架，该顶盖支架的具体结构参照上述实施例，由于本顶盖组件采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。其中，所述电池包括壳体和裸电芯，壳体具有安装腔和连通所述安装腔的安装开口，所述裸电芯设在所述安装腔，所述顶盖组件封盖在所述安装开口。
以上所述仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是在本申请的发明构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (15)

  1. 一种顶盖支架，应用于电池，所述电池设有注液孔，其中，所述顶盖支架包括：
    支架板，具有相对的第一表面和第二表面；和
    第一凸部，凸设在所述第一表面，所述顶盖支架设有缓冲槽、及至少贯穿所述缓冲槽的槽侧壁的过液孔，所述缓冲槽部分设在所述第一凸部且槽口贯穿所述第二表面，所述缓冲槽的槽底壁与所述注液孔相对设置。
  2. 根据权利要求1所述的顶盖支架，其中，所述第一表面为所述支架板的内表面并靠近所述电池的裸电芯设置，所述缓冲槽的槽侧壁包括第一壁段和第二壁段，所述第一壁段连接在所述第二壁段和所述支架板之间，所述第二壁段连接所述缓冲槽的槽底壁。
  3. 根据权利要求2所述的顶盖支架，所述第一凸部设在所述支架板的内表面，所述缓冲槽的槽口贯穿所述支架板的外表面，并面向所述注液孔设置。
  4. 根据权利要求2所述的顶盖支架，其中，所述第一壁段在靠近所述第二壁段的方向上朝中心逐渐靠拢设置。
  5. 根据权利要求4所述的顶盖支架，其中，所述第一壁段与所述缓冲槽的中轴线之间的夹角为110°至160°。
  6. 根据权利要求2所述的顶盖支架，其中，所述过液孔同时贯穿所述第二壁段和所述缓冲槽的槽底壁。
  7. 根据权利要求2所述的顶盖支架，其中，所述缓冲槽的槽口与所述注液孔相对设置，且所述缓冲槽的槽口宽度大于所述注液孔的孔径。
  8. 根据权利要求2所述的顶盖支架，其中，所述顶盖支架还包括凸设在所述第一表面的第二凸部，所述第二凸部的内表面凸出于第一凸部的内表面，并用以抵接在所述裸电芯。
  9. 根据权利要求1所述的顶盖支架，其中，所述过液孔的高度与所述缓冲槽的槽深的比值为30%至70%。
  10. 根据权利要求1所述的顶盖支架，其中，所述过液孔设有多个，多个所述过液孔沿所述缓冲槽的周向间隔分布。
  11. 根据权利要求1所述的顶盖支架，其中，所述第二表面为所述支架板的内表面并靠近电池的裸电芯设置，所述缓冲槽的槽侧壁包括第一壁段和第二壁段，所述第一壁段连接在所述第二壁段和所述支架板之间，所述第二壁段连接所述缓冲槽的槽底壁。
  12. 根据权利要求11所述的顶盖支架，其中，所述第一凸部设在所述支架板的外表面，所述缓冲槽的槽口贯穿所述支架板的内表面，并背离所述注液孔设置。
  13. 一种顶盖组件，包括顶盖本体、及如权利要求1至12中任一项所述的顶盖支架，所述顶盖支架设在所述顶盖本体，所述顶盖本体设有注液孔。
  14. 一种电池，包括壳体、裸电芯及如权利要求13所述的顶盖组件，所述壳体具有安装腔和连通所述安装腔的安装开口，所述裸电芯设在所述安装腔，所述顶盖组件封盖在所述安装开口。
  15. 根据权利要求14所述的电池，其中，所述电池还包括密封钉，所述密封钉插设在所述注液孔，且端部伸入所述缓冲槽，所述缓冲槽的槽底壁与所述密封钉相对设置。
PCT/CN2024/131786 2024-02-07 2024-11-13 顶盖支架、顶盖组件和电池 Pending WO2025167243A1 (zh)

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CN215418522U (zh) * 2021-07-29 2022-01-04 蜂巢能源科技有限公司 一种顶盖组件及锂电池
CN219591527U (zh) * 2023-03-16 2023-08-25 江苏天合储能有限公司 电芯的顶盖组件及电芯

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215418522U (zh) * 2021-07-29 2022-01-04 蜂巢能源科技有限公司 一种顶盖组件及锂电池
CN219591527U (zh) * 2023-03-16 2023-08-25 江苏天合储能有限公司 电芯的顶盖组件及电芯

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