WO2017219698A1 - Cylindrical battery with external ptc structure - Google Patents

Cylindrical battery with external ptc structure Download PDF

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Publication number
WO2017219698A1
WO2017219698A1 PCT/CN2017/075551 CN2017075551W WO2017219698A1 WO 2017219698 A1 WO2017219698 A1 WO 2017219698A1 CN 2017075551 W CN2017075551 W CN 2017075551W WO 2017219698 A1 WO2017219698 A1 WO 2017219698A1
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WO
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Prior art keywords
battery
ptc
cylindrical battery
cylindrical
negative
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PCT/CN2017/075551
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French (fr)
Chinese (zh)
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许祎凡
孟祎凡
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苏州安靠电源有限公司
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Publication of WO2017219698A1 publication Critical patent/WO2017219698A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/14—Cells with non-aqueous electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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 invention relates to a cylindrical battery, and more particularly to a cylindrical battery having an external PTC structure.
  • a battery pack of a large capacity is usually constructed by combining a plurality of cylindrical lithium ion batteries in parallel.
  • a large-capacity battery once a certain cylindrical battery is short-circuited, it is likely to cause thermal runaway and cause a battery fire accident.
  • a PTC overcurrent protection element is generally disposed in series inside each of the cylindrical batteries, and the PTC overcurrent protection element is generally disposed between the positive electrode post and the positive electrode cap of the battery.
  • the PTC over-current protection component disconnects itself and acts as an overcurrent protection to prevent battery thermal runaway accidents.
  • the PTC over-current protection component When the PTC over-current protection component works, it generates a certain amount of working heat, and it is disposed inside the battery, causing the working heat generation of the PTC over-current protection component to be concentrated in the battery, which cannot be dissipated in time, which has a negative impact on the performance of the battery. .
  • the object of the present invention is to provide a cylindrical battery using an external PTC overcurrent protection element to ensure battery safety while avoiding excessive heat collection inside the battery.
  • the technical solution of the present invention is: a cylindrical battery, comprising a battery body, respectively located in the battery A positive end and a negative end of the axial end faces of the body, and a PTC overcurrent protection element are disposed on the outer wall of the positive or negative end.
  • the PTC overcurrent protection element is disposed on the positive terminal.
  • the cylindrical battery is a lithium ion battery.
  • the invention further includes a negative steel shell sleeved outside the battery body and a positive electrode end fixed at one end of the battery body, the negative electrode end being formed on the negative steel shell, and the positive electrode end being formed on the positive electrode end.
  • the invention has the advantages that the PTC over-current protection component is arranged outside the cylindrical battery instead of the inside, and the heat generated by the PTC over-current protection component can be dissipated in time, and the heat does not flow over the battery and the PTC. A large amount of accumulation in the protection element improves the safety of the battery. Moreover, the heat generated inside the battery does not directly conduct to the PTC overcurrent protection component, so that the PTC overcurrent protection component is in a relatively low temperature environment.
  • FIG. 1 is a schematic structural view of a conventional cylindrical battery
  • FIG. 2 is a schematic structural view of a cylindrical battery according to an embodiment of the present invention.
  • 1- battery body 2- positive terminal, 3- negative terminal, 4-PTC overcurrent protection component.
  • Fig. 1 shows a specific embodiment of the cylindrical battery of the present invention. Similar to the conventional cylindrical battery, the battery also includes the battery body 1, respectively located in the battery. The positive end 2 and the negative end 3 of the axial end faces of the body 1 are, and in this example, the cylindrical battery is a lithium ion battery, that is, a cylindrical lithium ion battery. Specifically, in this embodiment, the battery further includes a negative steel shell sleeved outside the battery body 1 and a positive end fixed to one end of the battery body 1, and the positive terminal is also a steel material. The negative electrode terminal 3 is formed on the negative steel shell, and the positive electrode terminal 2 is formed on the positive electrode terminal.
  • a key improvement of this embodiment is that the outer wall of the positive terminal 2 is provided with a PTC overcurrent protection element 4. When the cylindrical battery is short-circuited, the PTC overcurrent protection element 4 is quickly disconnected, so that the battery is isolated from the circuit in time to prevent a battery safety accident.
  • the PTC overcurrent protection component 4 is disposed outside the cylindrical battery instead of inside, so that the heat generated when the PTC overcurrent protection component 4 operates can be dissipated in time, and the heat is not in the battery and the PTC overcurrent protection component. A large amount of aggregation has improved the safety of the battery. Moreover, the heat generated inside the battery when it is in operation does not directly conduct to the PTC overcurrent protection element 4, so that the PTC overcurrent protection element 4 is in a relatively low temperature environment.

Abstract

Disclosed is a cylindrical battery, comprising a battery body, an anode end and a cathode end respectively located at two axial end faces of the battery body, wherein a PTC over-current protection element is provided on an outer wall of the anode end or the cathode end. The cylindrical battery of the present invention uses an external PCT over-current protection element, the heat accumulated inside the battery is prevented from being too large while ensuring the security of the battery; and the action of the PTC element caused by a short circuit of any battery generally does not cause other parallel batteries to be isolated and does not have a large influence on the operational properties of a battery pack.

Description

具有外置PTC结构的圆柱形电池Cylindrical battery with external PTC structure 技术领域Technical field
本发明涉及一种圆柱形电池，尤其是一种具有外置PTC结构的圆柱形电池。The present invention relates to a cylindrical battery, and more particularly to a cylindrical battery having an external PTC structure.
背景技术Background technique
随着电子技术的迅猛发展，高比能量，高性能的圆柱形锂离子电池获得了更广泛的应用。此种电池不仅性能好而且不含有害物质，是绿色电源。它的各个性能几乎都达到了目前电池所能达到的最好的程度。With the rapid development of electronic technology, high specific energy, high performance cylindrical lithium ion batteries have been widely used. This battery is not only good in performance but also contains no harmful substances. It is a green power source. Its performance has almost reached the best level of current battery.
在实际应用中，为了提高电池容量，通常利用将众多圆柱形锂离子电池串并联组合在一起而构成大容量的电池组。在大容量电池中，一旦某一根圆柱形电池发生短路，便很容产生热失控而引起电池起火事故。In practical applications, in order to increase the battery capacity, a battery pack of a large capacity is usually constructed by combining a plurality of cylindrical lithium ion batteries in parallel. In a large-capacity battery, once a certain cylindrical battery is short-circuited, it is likely to cause thermal runaway and cause a battery fire accident.
参照图1所示，为了消除上述安全隐患，通常在每根圆柱形电池的内部串连设置PTC过流保护元件，该PTC过流保护元件一般布置在电池的正极柱和正极盖帽之间。当某根电池发生短路故障时，PTC过流保护元件便自行断开而起到过流保护作用，防止电池热失控事故的发生。Referring to FIG. 1, in order to eliminate the above safety hazard, a PTC overcurrent protection element is generally disposed in series inside each of the cylindrical batteries, and the PTC overcurrent protection element is generally disposed between the positive electrode post and the positive electrode cap of the battery. When a short-circuit fault occurs in a battery, the PTC over-current protection component disconnects itself and acts as an overcurrent protection to prevent battery thermal runaway accidents.
PTC过流保护元件工作时会产生一定的工作热量，而其布置在电池的内部，导致PTC过流保护元件的工作产热被聚焦在电池内，不能及时散发出去，对电池的性能造成负面影响。When the PTC over-current protection component works, it generates a certain amount of working heat, and it is disposed inside the battery, causing the working heat generation of the PTC over-current protection component to be concentrated in the battery, which cannot be dissipated in time, which has a negative impact on the performance of the battery. .
发明内容Summary of the invention
本发明目的是：为了克服上述问题，提供一种圆柱形电池，该电池采用外置的PTC过流保护元件，在保证电池安全的同时，避免电池内部集热量过大。SUMMARY OF THE INVENTION The object of the present invention is to provide a cylindrical battery using an external PTC overcurrent protection element to ensure battery safety while avoiding excessive heat collection inside the battery.
本发明的技术方案是：一种圆柱形电池，包括电池本体、分别位于该电池 本体轴向两端面的正极端和负极端，所述正极端或负极端的外壁上设置有PTC过流保护元件。The technical solution of the present invention is: a cylindrical battery, comprising a battery body, respectively located in the battery A positive end and a negative end of the axial end faces of the body, and a PTC overcurrent protection element are disposed on the outer wall of the positive or negative end.
本发明在上述技术方案的基础上，还包括以下优选方案：The invention further includes the following preferred solutions on the basis of the above technical solutions:
所述PTC过流保护元件设置在所述正极端上。The PTC overcurrent protection element is disposed on the positive terminal.
该圆柱形电池为锂离子电池。The cylindrical battery is a lithium ion battery.
还包括套在所述电池本体外的负极钢壳和固定在所述电池本体一端的正极端，所述负极端形成于所述负极钢壳上，所述正极端形成于该正极端上。The invention further includes a negative steel shell sleeved outside the battery body and a positive electrode end fixed at one end of the battery body, the negative electrode end being formed on the negative steel shell, and the positive electrode end being formed on the positive electrode end.
本发明的优点是：本发明将PTC过流保护元件布置在圆柱形电池的外部而非内部，保证PTC过流保护元件工作时产生的热量能够及时散发出去，热量不会在电池和PTC过流保护元件中大量聚集，提高了电池的安全性。而且电池工作时其内部产生的热量不会直接向PTC过流保护元件传导，使PTC过流保护元件处在相对较低的温度环境中。The invention has the advantages that the PTC over-current protection component is arranged outside the cylindrical battery instead of the inside, and the heat generated by the PTC over-current protection component can be dissipated in time, and the heat does not flow over the battery and the PTC. A large amount of accumulation in the protection element improves the safety of the battery. Moreover, the heat generated inside the battery does not directly conduct to the PTC overcurrent protection component, so that the PTC overcurrent protection component is in a relatively low temperature environment.
附图说明DRAWINGS
为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，下面描述中的附图仅仅是本发明的一些实施例，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获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. The drawings in the following description are only some embodiments of the present invention, which are common in the art. For the skilled person, other drawings can be obtained from these drawings without any creative work.
图1为常规圆柱形电池的结构示意图；1 is a schematic structural view of a conventional cylindrical battery;
图2为本发明实施例中圆柱形电池的结构示意图；2 is a schematic structural view of a cylindrical battery according to an embodiment of the present invention;
其中：1-电池本体，2-正极端，3-负极端，4-PTC过流保护元件。Among them: 1- battery body, 2- positive terminal, 3- negative terminal, 4-PTC overcurrent protection component.
具体实施方式detailed description
以下结合具体实施例对上述方案做进一步说明。应理解，这些实施例是用 于说明本发明而不限于限制本发明的范围。实施例中采用的实施条件可以根据具体厂家的条件做进一步调整，未注明的实施条件通常为常规实验中的条件。The above scheme will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are used The invention is not limited by the scope of the invention. The implementation conditions employed in the examples can be further adjusted according to the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in the conventional experiment.
图1示出了本发明这种圆柱形电池的一个具体实施例，与传统圆柱形电池相同的是，与传统圆柱形单体电池相同的是，该电池也包括电池本体1、分别位于该电池本体1的轴向两端面的正极端2和负极端3，而且本例中该圆柱形电池为锂离子电池，即圆柱形的锂离子电池。具体在本实施例中，该电池还包括套在所述电池本体1外的负极钢壳和固定在所述电池本体1一端的正极端，正极端也为钢质材料。所述负极端3形成于所述负极钢壳上，所述正极端2形成于该正极端上。Fig. 1 shows a specific embodiment of the cylindrical battery of the present invention. Similar to the conventional cylindrical battery, the battery also includes the battery body 1, respectively located in the battery. The positive end 2 and the negative end 3 of the axial end faces of the body 1 are, and in this example, the cylindrical battery is a lithium ion battery, that is, a cylindrical lithium ion battery. Specifically, in this embodiment, the battery further includes a negative steel shell sleeved outside the battery body 1 and a positive end fixed to one end of the battery body 1, and the positive terminal is also a steel material. The negative electrode terminal 3 is formed on the negative steel shell, and the positive electrode terminal 2 is formed on the positive electrode terminal.
本实施例的关键改进在于：所述正极端2的外壁上设置有PTC过流保护元件4。当该圆柱形电池发生短路事故时，所述PTC过流保护元件4会迅速断开，从而使该电池从电路中及时隔离，防止电池安全事故发生。A key improvement of this embodiment is that the outer wall of the positive terminal 2 is provided with a PTC overcurrent protection element 4. When the cylindrical battery is short-circuited, the PTC overcurrent protection element 4 is quickly disconnected, so that the battery is isolated from the circuit in time to prevent a battery safety accident.
本实施例将PTC过流保护元件4布置在圆柱形电池的外部而非内部，使得PTC过流保护元件4工作时产生的热量能够及时散发出去，热量不会在电池和PTC过流保护元件中大量聚集，提高了电池的安全性。而且电池工作时其内部产生的热量也不会直接向PTC过流保护元件4传导，使PTC过流保护元件4处在相对较低的温度环境中。In this embodiment, the PTC overcurrent protection component 4 is disposed outside the cylindrical battery instead of inside, so that the heat generated when the PTC overcurrent protection component 4 operates can be dissipated in time, and the heat is not in the battery and the PTC overcurrent protection component. A large amount of aggregation has improved the safety of the battery. Moreover, the heat generated inside the battery when it is in operation does not directly conduct to the PTC overcurrent protection element 4, so that the PTC overcurrent protection element 4 is in a relatively low temperature environment.
当然，我们也可以将PTC过流保护元件4设置在电池的负极端3上。Of course, we can also place the PTC overcurrent protection element 4 on the negative terminal 3 of the battery.
上述实施例只为说明本发明的技术构思及特点，其目的在于让人们能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明主要技术方案的精神实质所做的等效变换或修饰，都应涵盖在本发明的保护范围之内。 The above embodiments are merely illustrative of the technical concept and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the present invention and not to limit the scope of the present invention. Equivalent transformations or modifications made in accordance with the spirit of the main technical solutions of the present invention are intended to be included within the scope of the present invention.

Claims (4)

  1. 一种具有外置PTC结构的圆柱形电池，包括电池本体(1)、分别位于该电池本体轴向两端面的正极端(2)和负极端(3)，其特征在于：所述正极端(2)或负极端(3)的外壁上设置有PTC过流保护元件(4)。A cylindrical battery having an external PTC structure, comprising a battery body (1), a positive end (2) and a negative end (3) respectively located at axially opposite end faces of the battery body, wherein: the positive end ( 2) Or the outer wall of the negative terminal (3) is provided with a PTC overcurrent protection element (4).
  2. 根据权利要求1所述的具有外置PTC结构的圆柱形电池，其特征在于：所述PTC过流保护元件(4)设置在所述正极端(2)上。A cylindrical battery having an external PTC structure according to claim 1, wherein said PTC overcurrent protection member (4) is disposed on said positive terminal (2).
  3. 根据权利要求1所述的具有外置PTC结构的圆柱形电池，其特征在于：该圆柱形电池为锂离子电池。A cylindrical battery having an external PTC structure according to claim 1, wherein the cylindrical battery is a lithium ion battery.
  4. 根据权利要求1所述的具有外置PTC结构的圆柱形电池，其特征在于：还包括套在所述电池本体(1)外的负极钢壳和固定在所述电池本体(1)一端的正极端，所述负极端(3)形成于所述负极钢壳上，所述正极端(2)形成于该正极端上。 A cylindrical battery having an external PTC structure according to claim 1, further comprising a negative steel shell sleeved outside said battery body (1) and a positive electrode fixed to one end of said battery body (1) Extremely, the negative end (3) is formed on the negative steel shell, and the positive end (2) is formed on the positive end.
PCT/CN2017/075551 2016-06-23 2017-03-03 Cylindrical battery with external ptc structure WO2017219698A1 (en)

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CN105932322A (en) * 2016-06-23 2016-09-07 苏州安靠电源有限公司 Cylindrical battery with external PTC structure
CN109638368A (en) * 2018-12-20 2019-04-16 苏州安靠电源有限公司 Battery system

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