CN219917332U

CN219917332U - Battery shell assembly and external equipment

Info

Publication number: CN219917332U
Application number: CN202321165702.6U
Authority: CN
Inventors: 周江; 马学明; 亢诗雨; 邹武俊
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2023-05-15
Filing date: 2023-05-15
Publication date: 2023-10-27
Anticipated expiration: 2033-05-15

Abstract

The utility model discloses a battery shell assembly and external equipment, and relates to the technical field of batteries. The battery case assembly includes: the shell comprises an accommodating cavity for accommodating the battery cell; the conducting valve is arranged in the accommodating cavity and comprises a valve core, a blocking piece and an elastic piece, wherein the valve core is connected with the shell and provided with a channel, the blocking piece is arranged at one end of the valve core and used for blocking the channel, and the elastic piece is connected with the blocking piece; the blocking piece can be used for unblocking the channel under the action of external force, so that the accommodating cavity is communicated with the outside through the channel, and the elastic piece can be used for driving the blocking piece to block the channel when the external force is smaller than the elastic restoring force of the elastic piece. The battery shell assembly provided by the utility model can be repeatedly opened, and is compatible with secondary liquid injection and gas collection.

Description

Battery shell assembly and external equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery shell assembly and external equipment.

Background

As the service life of the battery increases, the electrolyte content in the interior of the housing gradually decreases, resulting in an increase in the internal resistance and a decrease in the capacity of the battery, creating a need to open the housing for secondary injection into the interior. In addition, due to various side reactions such as electrolyte decomposition and the like, gas can be generated in the shell, so that the internal pressure of the battery is increased, the battery is abnormally expanded or even exploded, and the gas generation mechanism of the battery can be analyzed by opening the shell to collect the gas, so that a targeted solution is sought to reduce the gas generation of the battery and improve the safety of the battery.

However, in the battery case in the market at present, after the battery core is put into the case, the electrolyte is injected into the battery case from the electrolyte injection hole, and the inside of the case is completely isolated from the outside through welding and sealing. Such a case does not have a secondary opening condition, and forced opening of the case will result in rejection of the cell.

Disclosure of Invention

The utility model aims to provide a battery shell assembly which can be repeatedly opened and is compatible with secondary liquid injection and gas collection.

Another object of the present utility model is to provide an external device that can cooperate with a battery housing assembly to secondary fill or collect gas from a battery.

The embodiment of the utility model provides a technical scheme that:

a battery housing assembly comprising:

the shell comprises an accommodating cavity for accommodating the battery cell;

the conducting valve is arranged in the accommodating cavity and comprises a valve core, a blocking piece and an elastic piece, wherein the valve core is connected with the shell and provided with an operation channel, the blocking piece is arranged at one end of the valve core and is used for blocking the operation channel, and the elastic piece is connected with the blocking piece;

the blocking piece can be used for removing blocking of the operation channel under the action of external force, so that the accommodating cavity is communicated with the outside through the operation channel, and the elastic piece can be used for driving the blocking piece to block the operation channel when the external force is smaller than the elastic restoring force of the elastic piece.

Further, a mounting hole is formed in the shell, one end of an operation channel of the valve core is connected with the mounting hole, the other end of the operation channel is propped against the plugging piece to seal the accommodating cavity, and the diameter of one end, far away from the shell, of the operation channel is smaller than the diameter of the plugging piece.

Further, the cross-sectional area of the operation passage gradually decreases in a direction away from the housing.

Further, the battery case assembly further includes a dust-proof member detachably engaged with the case to cover or open the mounting hole.

Further, the on valve further comprises a valve core shell arranged on the periphery of the valve core, and the side wall of the valve core shell and the side wall of the valve core jointly form an installation space to accommodate the elastic piece.

Further, an installation channel for accommodating the valve core, the elastic piece and the blocking piece is arranged in the valve core shell, one end of the installation channel is communicated with the installation hole, the other end of the installation channel is communicated with the accommodating cavity, the cross section area of the installation channel gradually decreases towards the direction away from the shell, and the diameter of one end away from the shell is smaller than the diameter of the blocking piece.

Further, the inner side wall of the valve core shell surrounding the installation channel is convexly provided with a limiting ring wall, and the outer side wall of the valve core, which is close to one end of the shell, is circumferentially connected with the limiting ring wall and is sealed.

Further, one end of the elastic piece in the expansion direction is connected with the plugging piece, the other end of the elastic piece in the expansion direction is connected with the valve core or the limiting ring wall, and the elastic piece is in a stretching state.

Further, a sealing gasket is arranged on one side of the sealing piece, facing the valve core, of the sealing piece, a sealing ring is arranged on one side of the sealing piece, and the sealing gasket abuts against the sealing ring and the diameter of the sealing gasket is larger than that of the sealing ring.

The embodiment of the utility model also provides external equipment which is applied to the battery shell assembly, wherein the battery shell assembly comprises a shell and a conducting valve, and the shell comprises a containing cavity for containing the battery cell; the conduction valve is arranged in the accommodating cavity and comprises a valve core, a blocking piece and an elastic piece, wherein the valve core is connected with the shell and provided with an operation channel, the blocking piece is arranged at one end of the valve core and is used for blocking the operation channel, and the elastic piece is connected with the blocking piece; the blocking piece can be used for removing blocking of the operation channel under the action of external force, so that the accommodating cavity is communicated with the outside through the operation channel, and the elastic piece can be used for driving the blocking piece to block the operation channel when the external force is smaller than the elastic restoring force of the elastic piece. The external equipment comprises a guide pipe and a storage part, one end of the guide pipe is communicated with a containing cavity contained in the storage part, and at least one through hole is circumferentially formed in the other end of the guide pipe, so that the guide pipe is communicated with the containing cavity when extending into the operation channel and pushing the blocking part to release blocking of the operation channel.

Compared with the prior art, the battery shell assembly provided by the utility model has the advantages that the blocking piece blocks the operation channel of the valve core under the action of the elastic piece in a natural state, so that the sealing of the accommodating cavity is ensured. When the containing cavity is required to be opened for secondary liquid injection or gas collection, acting force is applied to the plugging piece, so that the plugging piece can be used for removing the plugging of the operation channel. After the liquid injection or the gas collection is completed, the external force is removed, and the elastic piece can drive the blocking piece to block the operation channel again, so that leakage is avoided. Therefore, the battery case assembly provided by the utility model has the beneficial effects that: can be repeatedly opened, and is compatible with secondary liquid injection and gas collection.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

Fig. 1 is a cross-sectional view of a battery housing assembly provided by an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an external device according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a mating structure of the external device and the battery case assembly according to the present embodiment.

Icon: 100-a battery housing assembly; 110-a housing; 111-a receiving cavity; 112-mounting holes; 120-on valve; 121-a valve core; 1211-an operation channel; 122-blocking piece; 123-elastic member; 124-spool housing; 1241-installation space; 1242-mounting lane; 1243-limit ring wall; 130-dust guard; 200-an external device; 210-a catheter; 211-via holes; 220-storage.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings.

Examples

Referring to fig. 1, fig. 1 is a cross-sectional view of a battery case assembly 100 according to the present embodiment.

The battery housing assembly 100 provided in this embodiment is applied to a battery, and specifically includes a housing 110 and a conducting valve 120, where the housing 110 is provided with a housing cavity 111 for housing a battery cell, the conducting valve 120 is disposed in the housing cavity 111 and connected with the housing 110, and the conducting valve 120 can selectively open the housing cavity 111 under the action of an external force, so as to facilitate secondary injection and gas collection.

The conducting valve 120 comprises a valve core 121, a blocking piece 122 and an elastic piece 123, wherein the valve core 121 is connected with the shell 110, the valve core 121 is provided with an operation channel 1211, the blocking piece 122 is arranged at one end of the operation channel 1211 and is connected with the elastic piece 123, and the blocking piece 122 keeps blocking against one end of the operation channel 1211 under the action of the elastic piece 123.

In practical application, the operating channel 1211 is blocked by the blocking piece 122 in a natural state, and the accommodating cavity 111 is kept sealed. When secondary liquid injection or gas collection is required for the applied battery, a force is applied to the blocking member 122 to unblock the operation channel 1211, so that the receiving chamber 111 communicates with the outside through the operation channel 1211, and in this process, the elastic member 123 accumulates elastic potential energy. When the secondary liquid injection or the gas collection is completed, the acting force on the blocking piece 122 is removed, and the elastic piece 123 releases elastic potential energy to drive the blocking piece 122 to block the operation channel 1211 again, so that the sealing of the accommodating cavity 111 is completed.

Specifically, the housing 110 is provided with a mounting hole 112, and a portion of the valve core 121 corresponding to one end of the operation channel 1211 is connected to the mounting hole 112, i.e., one end of the operation channel 1211 communicates with the outside through the mounting hole 112. The end of the operating channel 1211 remote from the mounting hole 112 is abutted against the blocking piece 122 to close the accommodating chamber 111. The housing 110 may be a square housing, a cylindrical housing, or a polygonal housing, and the mounting hole 112 may be disposed at an upper end of the housing 110 in a placed state, so as to be far away from the electrolyte deposited at a lower end of the accommodating cavity 111, so as to avoid leakage of the electrolyte, that is, when the housing 110 includes an upper end plate, a lower end plate, and a sidewall, the mounting hole 112 may be disposed at the upper end plate, and in other embodiments, in order to improve space utilization, the mounting hole 112 may be disposed on the sidewall of the housing 110, so long as a deposition height far away from the electrolyte is maintained.

In effect, the diameter of the end of the operating channel 1211 remote from the housing 110 is smaller than the diameter of the closure member 122, the closure member 122 being outside the operating channel 1211. In practical application, the outside of the battery case assembly 100 sequentially passes through the mounting hole 112 and the operation channel 1211, and then applies a force to the blocking piece 122, so that the blocking piece 122 is separated from the end of the operation channel 1211 away from the mounting hole 112, i.e. the blocking of the operation channel 1211 is released. In this case, the accommodation chamber 111 is in communication with the operation passage 1211 through a gap between the blocking member 122 and the end of the valve body 121, and is in communication with the outside through the mounting hole 112 on the housing 110.

Considering that in practical applications, it is necessary to extend the force application tool into the operation channel 1211 from the outside to apply force to the blocking member 122, in order to accurately guide the force application direction of the force application tool, so as to facilitate the force application tool to accurately and rapidly push the blocking member 122 away from the valve core 121, in this embodiment, the cross-sectional area of the operation channel 1211 gradually decreases in a direction away from the housing 110. In other words, the operation passage 1211 gradually contracts in inner diameter from one end communicating with the mounting hole 112 to one end distant from the mounting hole 112. By the arrangement that the inner diameter is gradually contracted, the contact area of the operation passage 1211 and the blocking piece 122 can also be reduced, and the risk of leakage can be reduced in a natural state.

In order to prevent dust, insects, etc. in the external environment from entering the operation channel 1211 through the mounting hole 112 and thus being accumulated in the operation channel 1211, the blocking piece 122 can cause the substances to enter the accommodating cavity 111 when the blocking piece 122 unblocks the operation channel 1211, thereby disabling the battery. The battery case assembly 100 provided in this embodiment further includes a dust-proof member 130, and the dust-proof member 130 is detachably engaged with the case 110 to cover or open the mounting hole 112.

It will be appreciated that in the natural state, the dust-proof member 130 remains engaged with the housing 110, thereby achieving a continuous closure of the mounting hole 112. When secondary injection or gas collection is desired, the dust guard 130 is detached from the housing 110, thereby opening the mounting hole 112. After the operation is completed, the dust-proof member 130 is re-engaged with the housing 110 to re-cover the mounting hole 112, thereby preventing substances in the external environment from entering the operation channel 1211.

The conducting valve 120 provided in this embodiment further includes a valve core housing 124, where the valve core housing 124 is disposed at the periphery of the valve core 121 and is connected to the housing 110, and a side wall of the valve core housing 124 and a side wall of the valve core 121 together form an installation space 1241 to accommodate the elastic member 123. The valve core 121 is protected by the valve core housing 124, and the electrolyte is sealed and isolated.

Specifically, a mounting channel 1242 for accommodating the valve element 121, the elastic member 123 and the blocking member 122 is disposed in the valve element housing 124, one end of the mounting channel 1242 is communicated with the mounting hole 112, the other end is communicated with the accommodating cavity 111, the cross-sectional area of the mounting channel is gradually reduced in a direction away from the housing 110, and the diameter of one end away from the housing 110 is smaller than that of the blocking member 122.

It will be appreciated that the resilient member 123 expands and contracts within the mounting space 1241 upon application and withdrawal of a force to the blocking member 122. The cross section of the mounting channel 1242 gradually decreases towards the direction away from the housing 110, so as to ensure that the blocking piece 122 can be smoothly reset under the action of the elastic piece 123 when the external force is removed. The diameter of the end, away from the housing 110, of the mounting channel 1242 is smaller than the diameter of the blocking piece 122, limiting of the blocking piece 122 is achieved, and it is ensured that the blocking piece 122 cannot be withdrawn from the end, away from the housing 110, of the mounting channel 1242 even under an excessive force.

The inner side wall of the mounting channel 1242 surrounded by the valve core shell 124 is convexly provided with a limiting ring wall 1243, and the outer side wall of one end of the valve core 121, which is close to the housing 110, is circumferentially connected and sealed with the limiting ring wall 1243, so as to improve the overall sealing effect of the accommodating cavity 111. It should be noted that, the sealing connection between the valve core 121 and the limiting ring wall 1243 may be realized by welding, bonding, etc., and the valve core 121 may be integrally formed with the limiting ring wall 1243 and the valve core housing 124, so as to further improve the sealing effect.

In this embodiment, one end of the elastic member 123 in the expansion direction is connected to the blocking member 122, the other end of the elastic member 123 in the expansion direction is connected to the limiting ring 1243, and the elastic member 123 is in a stretched state. It will be appreciated that the elastic member 123 is always in tension, i.e. it ensures a continuous application of force to the blocking member 122, so as to ensure a reliable sealing of the blocking member 122 against the operating channel 1211. In other embodiments, the end of the elastic member 123 away from the blocking member 122 may also be connected to the valve core 121, and the specific connection manner may be adjusted according to practical application conditions.

In order to further improve the sealing performance of the plugging member 122 for plugging the operation channel 1211, in this embodiment, a sealing gasket is disposed on the side of the plugging member 122 facing the valve core 121, a sealing ring is disposed on the side of the valve core 121 facing the plugging member 122, the sealing gasket abuts against the sealing ring, and the diameter of the sealing gasket is larger than that of the sealing ring.

It can be appreciated that the sealing gasket and the sealing ring in this embodiment have corrosion resistance, so that corrosion caused by electrolyte is avoided. In addition, under the continuous acting force of the elastic member 123 in a natural state, the sealing gasket on the plugging member 122 is tightly abutted against the sealing ring at the end part of the valve core 121, and the contact surface of the sealing gasket and the sealing ring is deformed, so that the installation channel 1242 and the operation channel 1211 are reliably isolated.

In summary, the battery housing assembly 100 provided in the present embodiment can be repeatedly opened and closed, and is compatible with secondary liquid injection and gas collection.

Referring to fig. 2 and fig. 3 in combination, fig. 2 is a schematic structural diagram of an external device 200 according to the present embodiment, and fig. 3 is a schematic structural diagram of the external device 200 and a battery case assembly 100.

The present embodiment also provides an external device 200, where the external device 200 is dedicated to the aforementioned battery case assembly 100 to perform secondary injection or gas collection on the battery.

Specifically, the external device 200 includes a conduit 210 and a storage element 220, wherein one end of the conduit 210 is communicated with a storage cavity included in the storage element 220, and at least one through hole 211 is circumferentially provided at the other end of the conduit 210, so that the conduit 210 is communicated with the storage cavity 111 when extending into the operation channel 1211 and pushing the blocking element 122 to unblock the operation channel 1211.

In this embodiment, the conduit 210 is rigid to facilitate pushing of the occluding component 122 and the reservoir 220 is a balloon capable of being squeezed to expel internally stored material through the conduit 210. When secondary injection is required, electrolyte is filled into the storage element 220 in advance, then the dustproof element 130 on the shell 110 is opened, one end of the guide tube 210, which is far away from the storage element 220, extends into the operation channel 1211 of the valve core 121 through the mounting hole 112 until the guide tube 210 abuts against and pushes the blocking element 122 to be separated from abutting against the valve core 121. At this time, the storage member 220 is pressed, and the electrolyte stored therein is sequentially discharged into the mounting channel 1242 through the conduit 210 and the through hole 211, and the electrolyte enters the accommodating cavity 111 through the mounting channel 1242, thereby completing the secondary injection.

When gas collection is required, the storage member 220 is pressed in advance to empty the internal air, and then the dust-proof member 130 on the housing 110 is opened, and one end of the conduit 210, which is far away from the storage member 220, extends into the operation channel 1211 of the valve core 121 through the mounting hole 112 until the conduit 210 abuts and pushes the blocking member 122 out of abutment with the valve core 121. At this time, the storage member 220 is released, and the storage member 220 is restored, and the gas in the storage chamber 111 is sucked and stored through the duct 210 and the through hole 211, thereby completing the gas collection.

After the secondary liquid injection or gas collection is completed, the guide tube 210 is driven to withdraw from the mounting hole 112, and the dustproof piece 130 is reconnected with the housing 110 to cover the mounting hole 112, and the plugging piece 122 can automatically complete the re-plugging of the operation channel 1211 under the action of the elastic piece 123, namely, automatically complete the isolation of the accommodating cavity 111 from the outside. The storage member 220 has a function of injecting and absorbing gas and/or liquid, and may be an airbag, or may be an automatic control device (e.g., a pump) that communicates with the storage chamber, so as to automatically inject or absorb gas and/or liquid, thereby improving the working efficiency.

In summary, the external device 200 provided in this embodiment can be matched with the battery housing assembly 100 to perform secondary injection or gas collection on the battery.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A battery housing assembly, comprising:

a housing (110) including a receiving cavity (111) for receiving the battery cell;

a conduction valve (120) arranged inside the accommodating cavity (111) and comprising a valve core (121) connected with the shell (110) and provided with an operation channel (1211), a blocking piece (122) arranged at one end of the valve core (121) and used for blocking the operation channel (1211), and an elastic piece (123) connected with the blocking piece (122);

the blocking piece (122) can unblock the operation channel (1211) under the action of external force, so that the accommodating cavity (111) is communicated with the outside through the operation channel (1211), and the elastic piece (123) can drive the blocking piece (122) to block the operation channel (1211) when the external force is smaller than the elastic restoring force of the elastic piece.

2. The battery housing assembly according to claim 1, wherein a mounting hole (112) is provided in the housing (110), one end of an operation passage (1211) of the valve cartridge (121) is connected to the mounting hole (112), and the other end thereof is closed by abutting against the blocking member (122) to close the accommodation chamber (111), wherein a diameter of an end of the operation passage (1211) remote from the housing (110) is smaller than a diameter of the blocking member (122).

3. The battery housing assembly according to claim 2, wherein the cross-sectional area of the operating channel (1211) gradually decreases in a direction away from the housing (110).

4. The battery housing assembly of claim 2, wherein the battery housing assembly (100) further comprises a dust guard (130), the dust guard (130) removably mated with the housing (110) to cover or uncover the mounting aperture (112).

5. The battery case assembly according to claim 2, wherein the conduction valve (120) further includes a valve case housing (124) disposed at an outer periphery of the valve case (121), and a sidewall of the valve case housing (124) and a sidewall of the valve case (121) together form a mounting space (1241) to accommodate the elastic member (123).

6. The battery case assembly according to claim 5, wherein a mounting passage (1242) accommodating the valve element (121), the elastic member (123) and the blocking member (122) is provided in the valve element housing (124), one end of the mounting passage (1242) communicates with the mounting hole (112), the other end communicates with the accommodating chamber (111), the cross-sectional area thereof gradually decreases in a direction away from the case (110), and the diameter of the end away from the case (110) is smaller than the diameter of the blocking member (122).

7. The battery case assembly according to claim 6, wherein a limiting ring wall (1243) is provided on an inner side wall of the valve core case (124) surrounding the mounting channel (1242), and an outer side wall of the valve core (121) near one end of the case (110) is circumferentially connected and sealed with the limiting ring wall (1243).

8. The battery case assembly according to claim 7, wherein one end of the elastic member (123) in the expansion and contraction direction thereof is connected to the blocking member (122), the other end of the elastic member (123) in the expansion and contraction direction thereof is connected to the valve element (121) or the stopper ring wall (1243), and the elastic member (123) is in a stretched state.

9. The battery case assembly according to claim 1, wherein a gasket is provided on a side of the sealing member (122) facing the valve element (121), a seal ring is provided on an end of the valve element (121) facing the sealing member (122), the gasket abuts against the seal ring, and a diameter of the gasket is larger than a diameter of the seal ring.

10. The external device applied to the battery housing assembly (100) according to any one of claims 1 to 9, wherein the external device (200) comprises a conduit (210) and a storage member (220), one end of the conduit (210) is communicated with a containing cavity contained in the storage member (220), and at least one through hole (211) is circumferentially arranged at the other end of the conduit (210), so that the conduit (210) is communicated with the containing cavity (111) when the conduit (210) stretches into the operation channel (1211) and pushes the blocking member (122) to unblock the operation channel (1211).