WO2018145361A1

WO2018145361A1 - Cylindrical battery and usage thereof

Info

Publication number: WO2018145361A1
Application number: PCT/CN2017/081377
Authority: WO
Inventors: 朱传钦; 周显茂
Original assignee: 重庆市紫建电子有限公司
Priority date: 2017-02-09
Filing date: 2017-04-21
Publication date: 2018-08-16
Also published as: CN106601942A

Abstract

The present invention relates to a cylindrical battery and a usage thereof. The cylindrical battery comprises a housing of a cylindrical shape and provided with a battery cell inside. Cap structures are respectively provided at two ends of the housing; one electrode in two electrodes of the battery cell is connected to the housing, and the other electrode is connected to at least one of the cap structures. The cylindrical battery of the present invention is used in a small electrical appliance. In the present invention, because the cap structures are respectively provided at the two ends of the housing, one electrode of the battery cell is connected to the cap structures, and the other electrode is connected to the housing, electrode outputs of the two cap structures can be respectively connected to a charging circuit and a discharging circuit, so that the device of the present invention can simultaneously performs charging and discharging processes. In the present invention, since a connecting part is provided on the housing, the device of the present invention can be directly connected to the external part of an electrical appliance, without reserving a space for receiving the battery in the electrical appliance, so that the space utilization rate can be improved, and the electrical appliance and the battery of the invention can both meet the requirement of miniaturization.

Description

Column type battery and use thereof

Technical field

The invention relates to a column type battery and a use thereof, and belongs to the technical field of batteries.

Background technique

With the development of the economy and the progress of society, people's lives are becoming more intelligent and convenient. The emergence of various electrical appliances has reduced people's labor and made more efforts. Among them, the battery of the electrical appliance is one of the essential configurations for the life of the electrical equipment.

The metal-shell cylindrical lithium-ion battery is a commonly used lithium-ion battery on the market. The 18650 lithium-ion battery with a diameter of 18mm and a height of 65mm is commonly used in the market. The capacity is up to 3000mAh, which can be applied to electrical appliances such as notebook computers and electric vehicles. Other commonly used cylindrical batteries, such as 26650, 32650, etc., are used in electric vehicles or energy storage. With the development of Bluetooth technology, higher requirements have been placed on the power supply, requiring miniaturization of the battery, long life, and high security. Among them, miniaturization is an important issue that continues to be solved. Since the current Bluetooth device is small in size, in order to adapt to the Bluetooth device battery, it should also be miniaturized to meet the requirements, but the existing battery is not only incapable of the requirements, but also the Bluetooth device. There is also a certain amount of space for the battery to be stored, so the volume of the Bluetooth device is increased in disguise. At the same time, the existing cylindrical battery of the cylindrical battery is mostly a negative electrode at one end of the positive electrode. If it is used for charging, it needs to be taken out from one end of the columnar battery through the lead wire to complete the simultaneous charging and discharging process, so that the internal structure of the Bluetooth device becomes More complicated, reducing the space utilization of appliances such as Bluetooth devices. On the other hand, due to the internal structure limitation of the existing cylindrical battery, the liquid guiding fluid in the battery adopts a sheet-like structure, which is easily deformed by force during welding, thereby affecting the sealing effect of the battery and reducing the service life of the battery. And security.

Summary of the invention

In view of the above problems, an object of the present invention is to provide a column type battery which is small in size, can be externally mounted, and has a polarity of a casing, and uses thereof.

In order to achieve the above object, the present invention provides a column type battery comprising a housing having a columnar shape and internally provided with a battery core, and a cap structure is respectively disposed at both ends of the housing, and the two electrodes of the battery core are provided. One of the electrodes is coupled to the housing and the other electrode is coupled to at least one of the cap structures.

Wherein, an outer casing is sleeved on the outer casing, and a connecting portion connected to the electric appliance is disposed on the outer casing.

Wherein, the connecting portion is a thread structure or a snap structure.

Wherein the cap structure comprises a sealing ring disposed at an end of the housing, the sealing ring is provided with a through hole, and a guiding fluid is inserted in the through hole, and the sealing ring is away from the sealing ring One side of the housing is provided with a pole cap, and the fluid guide penetrates the through hole and is connected to the pole cap.

Wherein, the fluid guiding body is a columnar structure.

Wherein, the sealing ring is provided with a safety valve structure for exhausting when the internal pressure of the casing is excessive.

Wherein, the safety valve structure comprises at least one explosion-proof hole formed on the sealing ring, a thin layer is sealed on the explosion-proof hole, and at least one vent hole is opened on the pole cap for The inside of the casing is exhausted.

Wherein, an explosion-proof ring is arranged on the sealing ring.

Wherein a connecting piece connected to the housing is disposed between the guiding fluid and the battery core, and an insulating spacer connected to the connecting piece is disposed between the connecting piece and the electric core .

The electric core is a wound columnar battery in which a positive electrode sheet, a separator, and a negative electrode sheet are sequentially wound into one body.

Wherein, both the positive electrode and the negative electrode are made of an electrode material capable of intercalating and deintercalating lithium ions, and the positive electrode is composed of lithium cobaltate, lithium manganate, lithium cobalt nickel manganese oxide, lithium iron phosphate, lithium nickelate Any one or more materials; the negative electrode made of any one or more of graphite, silicon carbon, lithium titanate.

A use of the column type battery described in the small-sized appliance.

Wherein, the electrical appliance is a Bluetooth earphone or a hearing aid.

The present invention has the following advantages due to the above technical solution: 1. The two ends of the casing of the present invention are respectively provided with a cap structure, one of the electrodes of the battery core is connected with the cap structure, and the other electrode is connected with the casing. Therefore, the electrode outputs of the two cap structures can be respectively connected to the charging circuit and the discharging circuit, thereby realizing the charging and discharging process of the device of the present invention, and avoiding the need to An electrode lead is connected to charge and discharge, which makes the device of the present invention more compact, while saving space for the appliance. 2. Since the guide fluid of the present invention adopts a columnar structure, it is not easy to be deformed when the fluid guide is installed, and can be well joined with the seal ring to achieve complete sealing inside the casing, and at the same time fully contact with the pole cap to improve the use of the battery. Life is safety. 3. Since the present invention is provided with a safety valve on the seal ring, when the internal pressure of the battery is excessively caused by the improper use of the device of the present invention, the exhaust pressure can be released through the safety valve. 4. Since the present invention is provided with a connecting portion on the outer casing, the device of the present invention can be directly connected to the external use of the electric appliance, and there is no need to reserve a space for accommodating the battery in the electric appliance, thereby improving the space utilization rate of the electric appliance, using the electric appliance and the present invention. The batteries can meet the requirements of miniaturization.

The above summary is for the purpose of illustration only and is not intended to be limiting. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the appended claims.

DRAWINGS

In the drawings, the same reference numerals are used to refer to the The drawings are not necessarily to scale. It is to be understood that the appended drawings are not intended to

Figure 1 is a schematic view of the overall structure of the present invention;

2 is a schematic structural view of a cap structure of the present invention;

Figure 3 is a plan view of Figure 2;

Figure 4 is a schematic view showing the installation of the device of the present invention.

detailed description

In the following, only certain exemplary embodiments are briefly described. The described embodiments may be modified in various different ways, without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative rather

In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise stated; the terms "up, down, left, right, inside, outside, front end, rear end, head, tail" Orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing a simplified description of the present invention. Instead of indicating or implying that the device or component referred to must have a particular orientation, constructed and operated in a particular orientation, it is not to be construed as limiting the invention.

As shown in FIG. 1 , the device of the present invention comprises a hollow cylindrical housing 1 , in which a battery core 2 is inserted, and a cap structure 3 is fastened to each end of the housing 1 , and the battery core 2 has Two electrodes (i.e., positive and negative electrodes), one of which is coupled to the housing 1 and the other of which is coupled to at least one of the cap structures 3, such that the cap structure 3 of the apparatus of the present invention has a different polarity than the housing 1.

It should be noted that when the casing 1 is a nickel-plated steel casing or a stainless steel casing, it is preferable that the casing 1 has a negative electrode; when the casing 1 is an aluminum casing, it is preferable that the casing 1 has a positive electrode.

In a more preferred embodiment, both cap structures 3 are positively charged, and the housing 1 is negatively charged. When the electric appliance needs to be charged while being used, the two cap structures 3 can be respectively connected to the charging line and the discharging line, so that Although the energy density of the battery is reduced, after being applied to the electrical appliance, the overall structure is more reasonable, and the design of the electrical appliance is more convenient, and the space utilization rate is improved.

In order to further optimize the space structure of the electric appliance, the column type battery of the present invention can be sleeved on the outer side of the casing 1 with the outer casing 4 disposed along the length direction of the casing 1 and having a length smaller than the length of the casing 1 to make the casing Both ends of the body 1 can be exposed; a connecting portion (not shown) connected to the consumer is disposed on the outer casing 4, and the device of the present invention can be directly connected to the battery connecting portion reserved outside the electric device through the connecting portion. That is, the column type battery of the present invention is exposed outside the electric appliance, and it is no longer necessary to use the electric appliance to reserve a space for accommodating the battery, and the electric appliance is more convenient to be miniaturized and convenient.

Further, the connecting portion may adopt a thread structure or a snap structure, and the thread or the buckle may be integrally or tightly connected with the outer casing 4.

It should be noted that the connecting portion is not limited to the above structure, and as long as the reasonable connection with the electric appliance can be realized, any mechanism in the prior art can be connected according to the work requirement, such as connecting by pin, welding or gluing. .

As shown in FIG. 1 and FIG. 2, the cap structure 3 includes a sealing ring 31 disposed on the inner side of the end of the housing 1. The sealing ring 31 is provided with a through hole 32, and a guiding fluid 33 is inserted in the through hole 32. A sealing cap 31 is disposed away from the side of the housing 1 with a pole cap 34 through which the fluid guide 33 passes and is coupled to the pole cap 34.

It should be noted that the through hole 32 is preferably disposed in the middle of the sealing ring 31, and the guiding fluid 33 is preferably a columnar structure matching the shape of the through hole 32. Further, in order to connect the columnar guiding fluid 33 with the through hole 32, More precisely, a positioning step 35 may be disposed at one end of the fluid guide 33 near the housing 1; The cap 34 can be inserted into the sealing ring 31 for better fixing.

As shown in FIG. 2 and FIG. 3, in order to prevent the internal pressure of the battery from increasing due to improper operation, a safety valve structure may be disposed on the sealing ring 31 for conducting the battery through the safety valve when the pressure inside the housing 1 is excessive. Internal exhaust pressure relief.

Further, the safety valve structure comprises at least one explosion-proof hole 5 formed on the sealing ring, a thin layer 6 is sealed on the explosion-proof hole 5, and at least one vent hole 7 is opened in the pole cap 34, and the internal pressure of the housing 1 is When it is too large, it will break through the thin layer 6 at the explosion-proof hole 5 and remove the pressure from the vent hole 7 to complete the pressure relief operation of the battery.

In the above embodiment, the battery core 2 may be a wound type cylindrical battery core including a positive electrode sheet, a negative electrode sheet, and a separator and an electrolyte sandwiched therebetween, and the three are wound to form a columnar battery core. The positive electrode sheet may be connected to the housing 1 or the fluid guide 33, and the negative electrode sheet may be connected to the housing 1 or the fluid guide 33, and the housing 1 and the fluid guide 33 have different polarities.

It should be noted that the device of the present invention is a rechargeable lithium battery, and therefore both the positive electrode and the negative electrode are made of an electrode material capable of intercalating and deintercalating lithium ions, wherein the positive electrode is composed of lithium cobaltate, lithium manganate, lithium cobalt nickel manganate, Any one or more materials selected from the group consisting of lithium iron phosphate and lithium nickelate, and the negative electrode is made of any one or more materials of graphite, silicon carbon, and lithium titanate.

In the above embodiment, the cylindrical casing 1 may be cylindrical or prismatic, and its shape may be changed depending on the electric appliance.

In the above embodiment, as shown in FIG. 1 , a connecting piece 8 connected to the casing 1 is disposed between the guiding fluid 33 and the battery core 2 , and a connecting piece is connected between the connecting piece 8 and the battery core 2 . Insulating gasket 9.

In the above embodiment, as shown in Fig. 2, in order to improve the safety of the apparatus of the present invention, an explosion-proof ring 36 may be provided on the seal ring 31.

In the above embodiment, the housing 1 has a length of 10-50 mm, a diameter of 3-10 mm, and a capacity range of 20-1000 mAh.

The technical effects of the present invention will be described below by way of specific examples.

Example

As shown in FIG. 4, the housing 1 of the device of the present invention is a negative pole, and the two cap structures 3 are positive electrodes. In operation, the device of the present invention is first installed in the Bluetooth earphone 100, that is, one end of the housing 1 is threaded. Screw into the receiving port of the Bluetooth headset 100 (or insert one end of the housing 1 through the snap-fit structure) The fixing is completed in the receiving port card slot of the Bluetooth headset, the pole cap 34 (positive pole) of the cap structure 3 is connected to the discharge line of the Bluetooth headset 100, and the housing 1 (negative pole) is in contact with the inner side wall of the receiving port, and passes through the battery core 2 The positive electrode negative electrode plate acts in the electrolyte, and the power supply to the Bluetooth earphone 100 is completed by the cooperation of the pole cap 34 and the housing 1.

When the battery of the present invention is insufficient in power, the end of the housing 1 exposed to the outside of the Bluetooth earphone 100 can be connected to the charging line, thereby realizing the operation of the apparatus of the present invention while charging, or performing charging work alone. The device of the invention is small and light in structure, and is suitable for small electric equipment.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various changes or within the technical scope of the present disclosure. Instead, these should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A column type battery comprising a housing having a columnar shape and a battery core disposed therein, wherein a cap structure is respectively disposed at two ends of the housing, and one of the electrodes of the two electrodes of the battery core is The housing is coupled and the other electrode is coupled to at least one of the cap structures.
The column type battery according to claim 1, wherein an outer casing is sleeved on the outer casing, and a connecting portion connected to the electric appliance is provided on the outer casing.
The column type battery according to claim 2, wherein the connecting portion is a screw structure or a snap structure.
The column type battery according to claim 1, wherein the cap structure comprises a sealing ring disposed at an end of the housing, the sealing ring is provided with a through hole, and the through hole is inserted A guiding fluid is disposed, and a pole cap is disposed on a side of the sealing ring away from the housing, and the guiding fluid penetrates the through hole and is connected to the pole cap.
The column type battery according to claim 4, wherein the fluid guide is a columnar structure.
The column type battery according to claim 4, wherein a safety valve structure is provided on the seal ring for exhausting when the internal pressure of the casing is excessive.
The column type battery according to claim 6, wherein the safety valve structure comprises at least one explosion-proof hole formed in the seal ring, and a thin layer is sealed on the explosion-proof hole at the pole The cap is provided with at least one venting opening for exhausting the interior of the housing.
A column type battery according to claim 4, wherein an explosion-proof ring is provided on said seal ring.
The column type battery according to claim 4, wherein a connecting piece connected to the housing is disposed between the conductive fluid and the battery core, and the connecting piece and the battery core are An insulating spacer connected to the connecting piece is disposed therebetween.
The column type battery according to any one of claims 1 to 9, wherein the battery core is a wound columnar battery in which a positive electrode sheet, a separator, and a negative electrode sheet are sequentially wound together.
The column type battery according to claim 10, wherein both the positive electrode and the negative electrode are made of an electrode material capable of intercalating and deintercalating lithium ions, the positive electrode being composed of lithium cobaltate, lithium manganate, cobalt nickel manganese. Any one or more materials selected from the group consisting of lithium acid, lithium iron phosphate, and lithium nickelate; and the negative electrode is made of any one or more of graphite, silicon carbon, and lithium titanate.
Use of a column type battery according to any one of claims 1 to 11, characterized in that the column type battery is used in a small-sized electric appliance.
The use of a column type battery according to claim 12, wherein the appliance is a Bluetooth headset or a hearing aid.