CN221427864U

CN221427864U - Battery cell cover plate, secondary battery and electric equipment

Info

Publication number: CN221427864U
Application number: CN202323223675.6U
Authority: CN
Inventors: 刘厚义; 胡同飞; 张娜; 沈左松
Original assignee: Phylion Battery Co Ltd
Current assignee: Phylion Battery Co Ltd
Priority date: 2023-11-28
Filing date: 2023-11-28
Publication date: 2024-07-26
Anticipated expiration: 2033-11-28

Abstract

The utility model provides a battery cell cover plate, a secondary battery and electric equipment, which comprises the following components: the top cover body is provided with an explosion-proof through hole; the protection structure is arranged on the top cover body and comprises an explosion-proof piece and a stop grid, the explosion-proof piece is arranged in the explosion-proof through hole, the impact strength of the explosion-proof piece is smaller than that of the top cover body, the stop grid is connected to one side of the top cover body, and the stop grid is arranged around the explosion-proof through hole to separate the explosion-proof through hole. According to the utility model, when the battery core is in thermal runaway, the high-temperature and high-pressure gas in the battery can be discharged to the external environment through bursting the explosion-proof piece, so that the whole battery is prevented from being exploded, and structural fragments flushed along with the airflow are stopped through the stop grid, so that the potential safety hazard formed by the fact that the sprayed objects fly out of the explosion-proof through holes under the action of the impact airflow is reduced, the heat spreading is reduced, and the whole safety performance of the battery is improved to the greatest extent.

Description

Battery cell cover plate, secondary battery and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery cell cover plate, a secondary battery and electric equipment.

Background

The battery safety is always the problem of battery processing trade in the production manufacturing process first consideration, in conventional battery structure, along with its live time's increase, the inside electrolyte of casing takes place to decompose easily, and then produces gas, in order to avoid because the inside atmospheric pressure of battery is too big when gas increases, generally realize the pressure release function of battery through the additional safety structure such as explosion-proof spare, discharge valve on the battery apron in the trade, when the inside atmospheric pressure of battery is too big, gas can be through above-mentioned safety structure flushing casing, and then avoid the battery to take place the explosion.

The safety performance of the battery can be improved to a certain extent through the arrangement of the structure, but when gas rushes out of the battery shell, the structures such as the diaphragm, the pole piece and the like arranged on the battery core can burst along with the gas flow at the safety structure, the burst safety structure is free from shielding, and the burst fragments with extremely high temperature are splashed everywhere, so that the serious potential safety hazard exists.

Disclosure of Invention

Therefore, the utility model aims to solve the technical problem that internal fragments are easy to splash after the safety structure of the battery cover plate is broken in the prior art, and provides the battery core cover plate, the secondary battery and the electric equipment.

In order to solve the above technical problems, the present utility model provides a battery cell cover plate, which includes: the top cover body is provided with an explosion-proof through hole; the protection structure is arranged on the top cover body and comprises an explosion-proof piece and a stop grid, the explosion-proof piece is arranged in the explosion-proof through hole, the impact strength of the explosion-proof piece is smaller than that of the top cover body, and the stop grid is connected to one side of the top cover body and surrounds the explosion-proof through hole to separate the explosion-proof through hole.

In one embodiment of the present utility model, the stop grille includes a connecting portion and a separating portion, one side of the connecting portion is connected to the top cover body, the other side of the connecting portion is connected to the separating portion, the separating portion is spaced from the explosion-proof member and parallel to the explosion-proof member, and at least one stop plate is disposed on the separating portion.

In one embodiment of the present utility model, the connecting portion includes a fixing member and at least one connecting rod, the fixing member is connected to the top cover body around the explosion-proof through hole, one end of the connecting rod is connected to the fixing member, and the other end is connected to the partition portion.

In one embodiment of the utility model, the protective structure further comprises a stiffener connected to the cap body and disposed around the stopper grid.

In one embodiment of the utility model, the explosion-proof component is one of an explosion-proof piece, a pressure relief valve and a one-way air guide valve.

In one embodiment of the present utility model, the area of the stopper grill is not smaller than the area of the explosion proof through hole in a direction parallel to the top cover body.

In an embodiment of the utility model, the top cover body further includes two pole mounting portions, and the two pole mounting portions are symmetrically disposed on two sides of the protection structure along the length direction of the top cover body.

In one embodiment of the present utility model, two pole mounting holes are provided on any of the pole mounting portions.

The utility model also provides a secondary battery, which comprises the battery cell cover plate, a battery cell and a shell, wherein the battery cell cover plate is connected to one end of the shell, a closed space is defined by the battery cell cover plate and the shell together, and the battery cell is arranged in the closed space.

The utility model also provides electric equipment, which comprises the secondary battery.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

The battery cell cover plate can discharge high-temperature and high-pressure gas in the battery to the external environment through bursting the explosion-proof piece when the battery cell is in thermal runaway, so that the whole battery is prevented from explosion, and meanwhile, the utility model also stops structural fragments flushed along with air flow through the stop grid, thereby reducing potential safety hazards formed by the fact that jet matters fly out of the explosion-proof through holes under the action of impact air flow, reducing heat spreading and improving the whole safety performance of the battery to the greatest extent.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic perspective view of a battery cell cover plate in a preferred embodiment of the utility model;

FIG. 2 is a schematic perspective view of a portion of the battery cell cover in FIG. 1 from another perspective;

Fig. 3 is a schematic perspective view of a portion of the battery cell cover in fig. 1 at a third view angle.

Description of the specification reference numerals: 100. a top cover body; 110. an explosion-proof through hole; 120. a pole mounting portion; 121. a post mounting hole; 200. a protective structure; 210. an explosion-proof member; 220. a stop grid; 221. a connection part; 222. a partition portion; 2221. a stop plate; 223. a connecting rod; 230. a reinforcement.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

Example 1

Referring to fig. 1, the present embodiment provides a battery cell cover plate, which includes: the top cover comprises a top cover body 100, wherein an explosion-proof through hole 110 is formed in the top cover body 100; the protection structure 200, the protection structure 200 is mounted on the top cover body 100, and comprises an explosion-proof piece 210 and a stop grille 220, the explosion-proof piece 210 is mounted in the explosion-proof through hole 110, and has impact strength smaller than that of the top cover body 100, and the stop grille 220 is connected to one side of the top cover body 100 and is arranged around the explosion-proof through hole 110 to separate the explosion-proof through hole 110.

The battery cell cover plate can discharge high-temperature and high-pressure gas in the battery to the external environment through bursting the explosion-proof piece 210 when the battery cell is in thermal runaway, so that the whole battery is prevented from being exploded, and meanwhile, structural fragments flushed along with air flow are stopped through the stop grille 220, so that potential safety hazards formed by the fact that jet matters fly out of the explosion-proof through holes 110 under the action of impact air flow are reduced, heat spreading is reduced, the safety performance of the whole battery is improved to the greatest extent, and therefore the battery cell cover plate is novel and has the advantages of being simple in structure, low in cost and remarkable in effect.

Referring to fig. 1 to 3, the explosion-proof through hole 110 is disposed at the center of the battery cover plate along the length direction of the battery cover plate, so that the battery cover plate is stressed uniformly in the exhaust process, in this embodiment, the explosion-proof member 210 is preferably an explosion-proof plate, which is installed in the explosion-proof hole and has a thickness smaller than that of the battery cover plate, when the battery is out of control thermally, the high-heat and high-pressure air flow can be discharged out of the battery through bursting the explosion-proof plate, so as to achieve the purpose of avoiding explosion of the battery, further, the stop grid 220 is disposed at one side of the battery cover plate facing the inside of the battery housing, which is preferably a circular protruding grid disposed at the periphery of the explosion-proof hole, and the stop grid 220 is used for stopping the chip structure carried by the explosion-proof plate when the gas bursts the explosion-proof plate, so as to reduce the risk of injuring people due to the splashing around the burst chips with extremely high temperature. In other embodiments, the stopping grille 220 may be disposed on the outward side of the cell cover, which can also perform the function of stopping the fragments, and the explosion-proof member 210 may be configured as a pressure release valve, a unidirectional air guide valve, or other explosion-proof structures, which is not limited in the present utility model.

Specifically, the stop grille 220 includes a connection portion 221 and a partition portion 222, one side of the connection portion 221 is connected to the top cover body 100, the other side of the connection portion is connected to the partition portion 222, the partition portion 222 and the explosion-proof member 210 are disposed at intervals and parallel to the explosion-proof member 210, and at least one stop plate 2221 is disposed thereon. In this embodiment, the connection portion 221 is preferably a circular sheet-shaped connection member with a diameter larger than that of the explosion-proof hole, and is used for fixedly connecting the stop grille 220 to the surface of the cell cover plate, specifically, the connection portion 221 includes a fixing member and at least one connection rod 223, the fixing member is connected to the top cover body 100 around the explosion-proof through hole 110, one end of the connection rod 223 is connected to the fixing member, the other end is connected to the partition portion 222, and specifically, eight connection rods 223 arranged at intervals are provided around the periphery of the partition portion 222 and the connection portion 221 in this embodiment. The partition 222 is configured as a circular sheet with a diameter smaller than that of the connection part 221, and the partition 222 and the connection part are concentrically arranged in the thickness direction of the cell cover plate, so that the connection parts 221 are each inclined towards the outer periphery of the partition 222, the partition 222 is used for mainly stopping fragments on the air flow discharge path, further, the partition 222 in this embodiment includes three stop plates 2221 arranged at intervals along the length direction of the cell cover plate, any stop plate 2221 extends along the width direction of the cell cover plate, thus, the three stop plates 2221 divide the partition 222 into four exhaust channels, thereby achieving the purpose of stopping fragments on the premise of ensuring smooth discharge of air, in other embodiments, the explosion-proof holes can be configured in other shapes, correspondingly, the connection parts 221 and the partition parts can also be configured as rectangular, triangular or other special-shaped mechanisms, but all the area of the stop plate 220 is ensured to be not smaller than the area of the explosion-proof through hole 110 in the direction parallel to the top cover body 100, so that the stop plate 220 does not have an effect. In addition, the arrangement structure and number of the connecting rods 223 and the stop plates 2221 may be adjusted according to the actual requirement, for example, the stop plates 2221 are arranged in a cross structure to reduce the number of the stop plates 2221, and other detachable connection manners are adopted to implement the installation of the stop grid 220, which is not particularly limited in the present utility model.

In addition, the protection structure 200 in the present embodiment further includes a reinforcement 230, and the reinforcement 230 is connected to the top cover body 100 and disposed around the stop grid 220. In this embodiment, the reinforcement member 230 is preferably a hard frame body, which is disposed around the stop grid 220 and detachably connected with the cell cover plate, on one hand, the reinforcement member 230 can perform preliminary stop on splashed fragments, on the other hand, the reinforcement member 230 can strengthen the overall use strength of the cell cover plate, so as to avoid damage to the explosion-proof through hole 110 with weak strength during normal use.

Referring to fig. 2 and 3, the top cover body 100 further includes two pole mounting portions 120, and the two pole mounting portions 120 are symmetrically disposed on two sides of the protection structure 200 along the length direction of the top cover body 100, specifically, two pole mounting holes 121 are formed in any of the pole mounting portions 120, so that the battery cell cover plate can be applied to battery cells of different types, and the application range of the battery cell cover plate can be improved.

Example two

The embodiment provides a secondary battery, and it includes electric core apron, electric core and casing in the embodiment one, electric core apron connect in casing one end, electric core apron with the casing encloses jointly and establishes airtight space, electric core install in airtight space, and further, still fill in the inside electrolyte that can submerge electric core of casing, can adopt materials such as sealant to seal the setting after being connected between electric core apron and the casing.

Example III

The second embodiment provides an electric device, which includes the secondary battery in the second embodiment, and the electric device in the second embodiment may be an automobile, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The automobile can be a fuel oil automobile, a fuel gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others.

In summary, when the battery cell is out of control, the battery cell cover plate, the secondary battery and the electric equipment can discharge the high-temperature and high-pressure gas in the battery cell to the external environment through bursting the explosion-proof piece 210 so as to prevent the whole battery cell from exploding, and meanwhile, the utility model also stops structural fragments flushed along with the airflow through the stop grille 220, thereby reducing the potential safety hazard formed by the fact that the jet matters fly out from the explosion-proof through holes 110 under the action of the impact airflow, reducing the heat spreading and improving the safety performance of the whole battery cell to the greatest extent.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims

1. The utility model provides a electricity core apron which characterized in that: comprising the following steps:

The top cover body is provided with an explosion-proof through hole;

The protection structure is arranged on the top cover body and comprises an explosion-proof piece and a stop grid, the explosion-proof piece is arranged in the explosion-proof through hole, the impact strength of the explosion-proof piece is smaller than that of the top cover body, and the stop grid is connected to one side of the top cover body and surrounds the explosion-proof through hole to separate the explosion-proof through hole.

2. The cell cover of claim 1, wherein: the stop grille comprises a connecting part and a separating part, wherein one side of the connecting part is connected with the top cover body, the other side of the connecting part is connected with the separating part, the separating part is arranged at intervals with the explosion-proof piece and is parallel to the explosion-proof piece, and at least one stop plate is arranged on the separating part.

3. The cell cover of claim 2, wherein: the connecting portion comprises a fixing piece and at least one connecting rod, the fixing piece surrounds the explosion-proof through hole and is connected to the top cover body, one end of the connecting rod is connected with the fixing piece, and the other end of the connecting rod is connected with the separation portion.

4. The cell cover of claim 1, wherein: the protective structure further comprises a reinforcement member connected to the top cover body and disposed around the stop grid.

5. The cell cover of claim 1, wherein: the explosion-proof piece is one of an explosion-proof piece, a pressure relief valve and a one-way air guide valve.

6. The cell cover of claim 1, wherein: in the direction parallel to the top cover body, the area of the stop grille is not smaller than the area of the explosion-proof through hole.

7. The cell cover of claim 1, wherein: the top cover body further comprises two pole mounting portions, and the two pole mounting portions are symmetrically arranged on two sides of the protection structure along the length direction of the top cover body.

8. The cell cover of claim 7, wherein: any pole mounting portion is provided with two pole mounting holes.

9. A secondary battery characterized in that: the battery cell cover plate, the battery cell and the shell comprise any one of the battery cell cover plates, the battery cell and the shell, wherein the battery cell cover plate is connected to one end of the shell, a closed space is defined by the battery cell cover plate and the shell together, and the battery cell is arranged in the closed space.

10. An electrical consumer, characterized in that: comprising the secondary battery as claimed in claim 9.