CN217444579U - Battery with safety valve on side wall - Google Patents

Abstract

The utility model provides a battery of relief valve is taken to lateral wall belongs to battery technical field to solve the problem that prior art easily explodes, include: an electrode group; the positive electrode leading-out end and the negative electrode leading-out end are respectively and electrically connected to two ends of the electrode group; the battery internal insulation sealing sleeve is coated outside the electrode group, and the parts of the positive electrode leading-out end and the negative electrode leading-out end are arranged in the battery internal insulation sealing sleeve; the battery metal shell is coated outside an insulating sealing sleeve in the battery, the electrode group is sealed in a closed space defined by the positive electrode leading-out end, the negative electrode leading-out end and the battery metal shell, and a through hole is formed in the circumferential wall of the battery metal shell; the inner wall of the metal shell of the battery is provided with a pressure release ring, the pressure release ring is wrapped on the outer wall of an insulating sealing sleeve in the battery, and the pressure release ring corresponds to the through hole.

Description

A battery with a safety valve on the side wall

technical field

The utility model belongs to the technical field of batteries, and more particularly relates to a battery with a safety valve on the side wall.

Background technique

The battery safety valve is usually installed at both ends of the battery, but if the safety valve at both ends of the battery fails, the battery is prone to explosion, resulting in a safety accident.

For example, the hydrogen storage alloy with the application number of CN202111004365.8, the negative electrode containing the hydrogen storage alloy and the nickel-hydrogen secondary battery containing the negative electrode, if gas is generated in the external tank and its internal pressure rises, the valve body will be compressed due to the internal pressure. , the central through hole is opened, and as a result, the gas is released from the outer casing to the outside through the central through hole and the vent hole of the positive terminal. That is, the central through hole, the valve body, and the positive electrode terminal form a safety valve for the battery. Although the safety valve of this technical solution provides a certain degree of safety protection, if the safety valve at the end of the battery is blocked, there is still a very high risk of battery explosion.

Based on the search of the above-mentioned patents and combined with the equipment in the prior art, it is found that the prior art is prone to explosion. Even if there is a pressure relief valve, once the pressure relief valve is blocked, it is very easy to cause the battery to explode.

Therefore, in view of this, the existing structure and defects are studied and improved, and a battery with a safety valve on the side wall is provided, in order to achieve a more practical purpose.

Utility model content

In order to solve the above technical problems, the present invention provides a battery with a safety valve on the side wall to solve the problem of easy explosion in the prior art.

The purpose and effect of a battery with a safety valve on the side wall of the present utility model are achieved by the following specific technical means:

A battery with a side wall with a safety valve, comprising:

electrode group;

a positive electrode lead end and a negative electrode lead end, the positive electrode lead end and the negative electrode lead end are respectively electrically connected to both ends of the electrode group;

an internal insulating sealing sleeve of the battery, the internal insulating sealing sleeve of the battery covering the outside of the electrode group, and the parts of the positive terminal and the negative terminal are arranged in the internal insulating sealing sleeve of the battery;

A battery metal casing, the battery metal casing is wrapped around the outside of the battery internal insulating sealing sleeve, and the electrode group is sealed in the space enclosed by the positive terminal, the negative terminal, and the battery metal casing. The peripheral wall of the battery metal casing A through hole is provided;

The inner wall of the battery metal casing is provided with a pressure release ring, the pressure release ring is wrapped on the outer wall of the insulating sealing sleeve inside the battery, and the pressure release ring corresponds to the position of the through hole. When the internal pressure of the battery metal casing is too large, The position where the pressure release ring is in contact with the through hole can be ruptured and the pressure is released.

Further, the material of the pressure release ring is aluminum foil, the outer peripheral wall of the pressure release ring is covered with an isolation film, and the isolation film is plastic.

Further, the electrode group includes a bipolar battery plate, and the negative end of the bipolar battery plate is sequentially connected with a metal heat conduction ring, an isolation and fixing ring, and a diaphragm, and the diaphragm on this side is electrically connected to the positive terminal. connect;

The positive end of the bipolar battery plate is sequentially connected with a diaphragm, an isolation fixing ring, and a metal heat conduction ring, and the metal heat conduction ring on this side is electrically connected with the negative electrode lead-out terminal. The outer circumference of the isolation fixing ring and the metal heat conduction ring are close to each other. Insulating the inner wall of the sealing sleeve inside the battery.

Further, the electrode group includes at least two bipolar battery electrode plates that are overlapped, and a separator is arranged between two adjacent bipolar battery electrode plates, and the separator is close to the bipolar battery electrode. The surface of the negative electrode of the plate is sequentially provided with an isolation fixing ring and a metal heat conducting ring;

The negative electrode of the bipolar battery plate close to the positive terminal is sequentially provided with a metal heat conduction ring, an isolation fixing ring, and a diaphragm;

The positive electrode of the bipolar battery electrode plate close to the negative electrode lead-out end is sequentially provided with a diaphragm, an isolation fixing ring, and a metal heat conducting ring;

The outer circumference of the isolation fixing ring and the metal heat conducting ring is close to the inner wall of the insulating sealing sleeve inside the battery.

Further, the positive terminal includes a battery positive electrode and a battery safety valve, the battery safety valve is arranged in the battery positive electrode, and the battery positive electrode is electrically connected to one end of the electrode group;

The negative lead-out end includes a battery negative electrode and a T-shaped sealing plug, the T-shaped sealing plug is arranged in the battery negative electrode, and the battery negative electrode is electrically connected to the other end of the electrode group.

Further, it also includes a battery isolation liquid-conducting ring, the battery isolation liquid-conducting ring is arranged on the bipolar battery pole plate, and a liquid-passing channel is formed in the middle thereof.

Further, it also includes a metal pressure ring, the metal pressure ring is arranged on the lead-out ends of the two electrodes, and is covered in the metal casing of the battery.

Further, an insulating pressure ring is also included, the insulating pressure ring is arranged in the metal casing of the battery, and is arranged between the insulating sealing sleeve inside the battery and the metal pressure ring.

Further, it also includes a blue thermoplastic tube marked with a negative pole and a red plastic tube marked with a positive pole. The outer wall of the battery metal casing at the positive terminal.

Further, an electrode sealant is also included, and the electrode sealant is arranged on the inner ring of the metal pressure ring.

Compared with the prior art, the utility model has the following beneficial effects:

The battery with the safety valve on the side wall of the utility model can open the safety valve on the side wall when the safety valve at the end of the battery fails, release the pressure of the battery, avoid the battery explosion, and improve the safety factor of the battery. The battery safety assurance measures greatly reduce the probability of battery explosion.

Description of drawings

FIG. 1 is a schematic cross-sectional structure diagram of Embodiment 2 of the present invention.

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1 .

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1 .

In the figure, the corresponding relationship between component names and drawing numbers is:

Battery positive electrode 1, battery safety valve 2, battery metal shell 3, through hole 301, battery internal insulating sealing sleeve 4, diaphragm 5, isolation fixing ring 6, battery isolation liquid conducting ring 7, bipolar battery plate 8, insulation Pressure ring 9, metal pressure ring 10, battery negative electrode 11, T-shaped sealing plug 12, negative marked blue thermoplastic tube 13, metal heat conduction ring 14, positive marked red plastic tube 15, electrode sealant 16, separator 18, Pressure relief ring 19.

Detailed ways

The embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

In the description of the present utility model, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer" ", "front end", "rear end", "head", "tail" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present utility model and simplifying the description, Rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be connected integrally; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1:

The utility model provides a battery with a safety valve on the side wall, comprising:

electrode group;

The positive terminal, the negative terminal, the positive terminal and the negative terminal are respectively electrically connected to both ends of the electrode group;

The battery internal insulating sealing sleeve 4, the battery internal insulating sealing sleeve 4 is wrapped outside the electrode group, and the parts of the positive terminal and the negative terminal are arranged in the battery internal insulating sealing sleeve 4;

The battery metal casing 3, the battery metal casing 3 is wrapped on the outside of the battery internal insulating sealing sleeve 4, and the electrode group is sealed in the space enclosed by the positive terminal, the negative terminal, and the battery metal casing 3. The battery metal casing 3 is provided with a circumferential wall. There is a through hole 301;

The inner wall of the battery metal casing 3 is provided with a pressure release ring 19. The pressure release ring 19 covers the outer wall of the battery internal insulating sealing sleeve 4. The pressure release ring 19 corresponds to the position of the through hole 301. When the internal pressure of the battery metal casing 3 is too large, the pressure release ring 19 is released. The position where the pressure ring 19 is in contact with the through hole 301 can be ruptured and the pressure can be released. The diameter of the through hole 301 is 3mm to 6mm, and the pressure release pressure is guaranteed to be between 0.2Mpa and 3Mpa.

In this embodiment, the electrode group is enclosed in the closed space enclosed by the battery metal casing 3 , the negative electrode terminal, and the battery metal casing 3 . High-pressure gas occurs inside the battery. When the air pressure reaches a certain value, the pressure release ring 19 is in contact with the through hole 301 . The part of the battery is ruptured, and then the gas is released, which solves the contradiction between the release of the battery pressure and the protection of the battery structure. question. The electrode group is the core structure that can convert electric energy inside the battery.

Embodiment 2:

As shown in Figure 1 to Figure 3:

The rest of the features are the same as those of the first embodiment, except that the material of the pressure release ring 19 in this embodiment is aluminum foil, the outer peripheral wall of the pressure release ring 19 is covered with an isolation film 18 , and the isolation film 18 is made of plastic.

The aluminum foil is used as the material of the pressure release ring 19, which is convenient to adjust the air pressure value of the pressure release ring 19 to be ruptured under pressure.

When the pressure release ring 19 is pressurized, a part of the battery electrolyte is sprayed out and reacts with the aluminum foil, causing the aluminum to change color, which is convenient for personnel to observe whether the pressure release ring 19 releases the pressure. The material of the pressure release ring 19 can also be copper foil.

The electrode group includes a bipolar battery electrode plate 8, and the negative end of the bipolar battery electrode plate 8 is sequentially connected with a metal heat conduction ring 14, an isolation fixing ring 6, and a diaphragm 5, and the diaphragm 5 on this side is electrically connected to the positive electrode terminal. ;

The positive end of the bipolar battery plate 8 is sequentially connected with a diaphragm 5, an isolation fixing ring 6, and a metal heat conduction ring 14, and the metal heat conduction ring 14 on this side is electrically connected to the negative terminal. The isolation fixing ring 6, the metal heat conduction ring 14 The outer circumference is close to the inner wall of the insulating sealing sleeve 4 inside the battery.

The disposition of the heat conducting ring 14 is beneficial to dissipate the heat inside the battery to the outside of the battery.

The isolation and fixing ring 6 has a thickness of 0.2 mm to 6 mm, an inner diameter of 8 mm to 180 mm, and an outer diameter of 10 mm to 200 mm. The material of the isolation and fixing ring 6 is nylon or alkali-resistant rubber. The isolation fixing ring 6 matches the thickness of the positive and negative plates of the bipolar battery pole plate 8 to ensure that there is no leakage between the battery cells inside the isolated and sealed battery.

The electrode group includes at least two bipolar battery electrode plates 8 overlapped, a separator 5 is arranged between two adjacent bipolar battery electrode plates 8, and the separator 5 is arranged in turn on the surface of the bipolar battery electrode plate 8 close to the negative electrode There are isolation fixing rings 6 and metal heat conducting rings 14;

The negative electrode of the bipolar battery plate 8 close to the positive electrode terminal is sequentially provided with a metal heat conduction ring 14, an isolation fixing ring 6, and a diaphragm 5;

The positive electrode of the bipolar battery plate 8 close to the negative electrode terminal is sequentially provided with a diaphragm 5, an isolation fixing ring 6, and a metal heat conducting ring 14;

The outer circumferences of the isolation fixing ring 6 and the metal heat conducting ring 14 are close to the inner wall of the insulating sealing sleeve 4 inside the battery.

Among them, the diaphragm 5 is punched and cut into a circular diaphragm with an outer diameter of 10 mm to 200 mm and an inner diameter of 1 mm to 20 mm according to the Ni-MH battery diaphragm required for this model, and is heated and formed with a mold, and then alkali-resistant. Glue glues the edge of the diaphragm to the positive plate to ensure that the positive plate is completely wrapped by the diaphragm, and the performance of the diaphragm in the middle cannot be damaged.

The positive terminal includes a battery positive electrode 1 and a battery safety valve 2, the battery safety valve 2 is arranged in the battery positive electrode 1, and the battery positive electrode 1 is electrically connected to one end of the electrode group;

The negative lead-out terminal includes a battery negative electrode 11 and a T-shaped sealing plug 12. The T-shaped sealing plug 12 is arranged in the battery negative electrode 11, and the battery negative electrode 11 is electrically connected to the other end of the electrode group.

The battery safety valve 2 is set in the positive electrode 1 of the battery. When the air pressure inside the battery and the air pressure reaches a certain value, the battery safety valve 2 will be opened to release the air pressure in the battery to ensure that the battery is in a safe state and will not cause damage to the battery. explode.

It also includes a battery isolation liquid-conducting ring 7, the battery isolation liquid-conducting ring 7 is arranged on the bipolar battery plate 8, and a liquid-passing channel is formed in the middle thereof.

The function of the battery isolation liquid-conducting ring 7 is to form a liquid-conducting channel in the center of the battery, supply electrolyte to each unit cell through the liquid-conducting groove of each liquid-conducting ring, and at the same time, each unit cell derives the voltage of each unit through the liquid-conducting groove. The central liquid-conducting hole forms a pressure equalizing effect, which prevents the leakage of electricity across the unit cells.

It also includes a metal pressure ring 10 . The metal pressure ring 10 is arranged at the lead-out ends of the two electrodes and is covered in the metal casing 3 of the battery.

The metal casing 3 of the battery is withheld on the metal pressing ring 10 by the combination of rolling and stamping technology, so as to ensure that the round tube does not break or leak under the pressure of 4 MPa in the battery.

The metal pressure ring 10 has an outer diameter of 15-200 mm, an inner diameter larger than the outer diameter of the electrode head 2, a thickness of 0.5-6 mm, and is made of stainless steel or nickel-plated steel plate.

It also includes an insulating pressure ring 9 . The insulating pressure ring 9 is arranged in the battery metal casing 3 and between the battery internal insulating sealing sleeve 4 and the metal pressure ring 10 .

The traditional round battery is sealed with nylon gaskets to seal and fix the battery. The cylindrical battery adopts a metal pressure ring 10, an insulating pressure ring 9, and an insulating sealing sleeve 4 inside the battery to form a sealing system, which overcomes the high internal pressure of the traditional round battery. Under the circumstance, the nylon ring is crushed, causing the short circuit of the battery and the disadvantage of fire.

The inner diameter of the insulating pressure ring 9 is larger than the outer diameter of the positive and negative output heads, the thickness is 2-8 mm, and it is made of nylon, polyurethane, tetrafluoroethylene, and alkali-resistant rubber materials. The pressure change during the charging and discharging process of the battery is -0.05 to 2.6 MPa, and the energy of the length change is absorbed when the external air temperature changes from -45° to 85°. Make sure the battery is used normally.

It also includes a blue thermoplastic tube 13 marked with a negative pole, a red plastic tube 15 marked with a positive pole, a blue thermoplastic tube 13 marked with a negative pole is covered on the outer wall of the battery metal casing 3 at the positive terminal, and a red plastic tube 15 marked with the positive pole is wrapped around the positive terminal. the outer wall of the battery metal casing 3 at the end.

The negative electrode marked blue thermoplastic tube 13 and the positive electrode marked red plastic tube 15 are used to identify the negative electrode and positive electrode of the battery, respectively, to ensure that the positive and negative electrodes of the battery are easy to identify.

It also includes an electrode sealant 16 , and the electrode sealant 16 is disposed on the inner ring of the metal pressing ring 10 .

The sealant 16 is epoxy resin or silica gel, and the battery pole head is sealed by the sealant 16, and its function is to further seal the battery pole head to prevent the battery from creeping alkali.

The embodiments of the present invention are presented for purposes of illustration and description, and are not intended to be exhaustive or to limit the invention to the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to better explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for the design of various embodiments with various modifications as are suited to the particular use.

Claims (10)

1. A battery with a safety valve on the side wall is characterized in that: the method comprises the following steps:

an electrode group;

the positive electrode leading-out end and the negative electrode leading-out end are respectively and electrically connected to two ends of the electrode group;

the battery internal insulation sealing sleeve (4) is coated outside the electrode group, and the parts of the positive electrode leading-out end and the negative electrode leading-out end are arranged in the battery internal insulation sealing sleeve (4);

the battery metal shell (3) is wrapped outside the battery internal insulation sealing sleeve (4), the electrode group is sealed in a space enclosed by the positive electrode leading-out end, the negative electrode leading-out end and the battery metal shell (3), and a through hole (301) is formed in the circumferential wall of the battery metal shell (3);

the inner wall of the metal battery shell (3) is provided with a pressure release ring (19), the pressure release ring (19) is wrapped on the outer wall of an insulating sealing sleeve (4) in the metal battery shell, the pressure release ring (19) corresponds to the through hole (301) in position, and when the internal pressure of the metal battery shell (3) is too high, the contact position of the pressure release ring (19) and the through hole (301) can be broken and the pressure can be released.

2. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: the material of the pressure release ring (19) is aluminum foil, the peripheral wall of the pressure release ring (19) is coated with an isolation film (18), and the isolation film (18) is plastic.

3. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: the electrode group comprises a bipolar battery plate (8), the negative end of the bipolar battery plate (8) is sequentially connected with a metal heat conduction ring (14), an isolation fixing ring (6) and a diaphragm (5), and the diaphragm (5) on the side is electrically connected with a positive leading-out end;

bipolar battery polar plate (8) positive terminal has connected gradually diaphragm (5), keeps apart solid fixed ring (6), metal heat conduction ring (14), and the metal heat conduction ring (14) and the negative pole of this side draw forth end electric connection, keep apart solid fixed ring (6), metal heat conduction ring (14) outer circumference and be close to in battery internal insulation seal cover (4) inner wall.

4. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: the electrode group comprises at least two bipolar battery pole plates (8) which are overlapped, a diaphragm (5) is arranged between every two adjacent bipolar battery pole plates (8), and an isolation fixing ring (6) and a metal heat conduction ring (14) are sequentially arranged on the surface, close to the negative pole of each bipolar battery pole plate (8), of the diaphragm (5);

the cathode of the bipolar battery plate (8) close to the anode leading-out end is sequentially provided with a metal heat conducting ring (14), an isolating fixing ring (6) and a diaphragm (5);

the anode of the bipolar battery plate (8) close to the cathode leading-out end is sequentially provided with a diaphragm (5), an isolation fixing ring (6) and a metal heat conduction ring (14);

the outer circumferences of the isolation fixing ring (6) and the metal heat conducting ring (14) are close to the inner wall of the battery internal insulation sealing sleeve (4).

5. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: the positive leading-out end comprises a battery positive electrode (1) and a battery safety valve (2), the battery safety valve (2) is arranged in the battery positive electrode (1), and the battery positive electrode (1) is electrically connected with one end of an electrode group;

the negative electrode leading-out end comprises a battery negative electrode (11) and a T-shaped sealing plug (12), the T-shaped sealing plug (12) is arranged in the battery negative electrode (11), and the battery negative electrode (11) is electrically connected with the other end of the electrode group.

6. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: the battery isolation liquid guide ring (7) is arranged on the bipolar battery plate (8), and a liquid passage is formed in the middle of the battery isolation liquid guide ring (7).

7. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: the battery is characterized by further comprising a metal pressing ring (10), wherein the metal pressing ring (10) is arranged at the two electrode leading-out ends and covers the battery metal shell (3).

8. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: still include insulating clamping ring (9), insulating clamping ring (9) set up in battery metal casing (3), set up between battery internal insulation seal cover (4) and metal clamping ring (10).

9. A battery having a safety valve on a side wall thereof as claimed in claim 1, wherein: the battery lead-out end is characterized by further comprising a negative pole marking blue thermoplastic tube (13) and a positive pole marking red plastic tube (15), wherein the negative pole marking blue thermoplastic tube (13) is wrapped on the outer wall of the battery metal shell (3) of the positive pole lead-out end, and the positive pole marking red plastic tube (15) is wrapped on the outer wall of the battery metal shell (3) of the positive pole lead-out end.

10. A battery having a safety valve on a side wall thereof as claimed in claim 8, wherein: the electrode sealing device is characterized by further comprising electrode sealing glue (16), wherein the electrode sealing glue (16) is arranged on the inner ring of the metal pressing ring (10).

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