CN221226530U - A cover plate assembly, a housing and a battery - Google Patents

Abstract

The application provides a cover plate assembly, a shell and a battery, wherein the cover plate assembly comprises: the cover plate is provided with a liquid injection port; the liquid storage bin is connected with the cover plate, is formed with a liquid storage cavity and a liquid outlet, and is used for storing standby electrolyte and is respectively communicated with the liquid injection port and the liquid outlet; the liquid injection mechanism is used for closing or opening the liquid outlet, so that when the liquid outlet is opened by the liquid injection mechanism, the standby electrolyte stored in the liquid storage cavity is discharged from the liquid outlet to complete the liquid supplementing operation, and the problem that the circulating performance is poor and the circulating life of the battery is reduced due to the fact that the common electrolyte in the accommodating space is gradually consumed in the circulating process is avoided.

Description

A cover plate assembly, a housing and a battery

Technical Field

The present application relates to the field of battery technology, and in particular to a cover plate assembly, a housing and a battery.

Background technique

With the rapid development of new energy technologies, batteries have been widely used in various electronic devices and electric vehicles. When the battery is running, it needs to undergo cyclic redox reactions through the electrolyte.

In the prior art, due to the battery energy density, too much electrolyte cannot be injected into the battery during the production process, otherwise it will cause the battery energy density to decrease, the side reactions to be large at high temperatures, the safety performance to deteriorate, etc., and the limited electrolyte will be gradually consumed during the circulation process, resulting in poor cycle performance, thereby reducing the cycle life of the battery.

Utility Model Content

The present application mainly provides a cover plate assembly, a housing and a battery, which can prevent the common electrolyte in the accommodating space from being gradually consumed during the circulation process, resulting in poor cycle performance and thus reducing the cycle life of the battery.

In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a cover plate assembly, the cover plate assembly comprising: a cover plate, formed with a liquid injection port; a liquid storage tank, connected to the cover plate, the liquid storage tank forming a liquid storage cavity and a liquid outlet, the liquid storage cavity is used to store spare electrolyte and is respectively connected to the liquid injection port and the liquid outlet; a liquid injection mechanism, used to close or open the liquid outlet.

In a specific embodiment, the injection mechanism is movably disposed on the cover plate, and the injection mechanism is also used to close or open the injection port.

In a specific embodiment, the liquid injection mechanism includes a movable part and an elastic part, one end of the elastic part abuts against the cover plate or the liquid storage tank, and the other end abuts against the movable part, so that the movable part closes the liquid outlet under the elastic force of the elastic part, and the movable part overcomes the elastic force of the elastic part to open the liquid outlet when subjected to external force.

In a specific embodiment, the movable part includes a first closed body and a second closed body, the first closed body is movably arranged in the liquid filling port, the second closed body is connected to the first closed body, the elastic part abuts against the liquid storage tank and the first closed body respectively, or the elastic part abuts against the cover plate and the second closed body respectively, so that the first closed body closes the liquid filling port under the elastic force of the elastic part, and the second closed body closes the liquid outlet under the elastic force of the elastic part.

In a specific embodiment, the elastic member is respectively in contact with the liquid storage tank and the first closed body, and the second closed body is located on the side of the liquid storage tank away from the liquid storage cavity, so that when the first closed body is subjected to an external force in a first direction, the second closed body moves in the direction of the liquid storage cavity toward the liquid outlet.

In a specific embodiment, the elastic member is respectively in contact with the cover plate and the second closed body, and the second closed body is arranged in the liquid storage cavity, so that when the first closed body is subjected to an external force in a second direction, the second closed body moves in the direction of the liquid storage cavity away from the liquid outlet.

In a specific embodiment, the movable part is also used to open the liquid filling port when subjected to the external force, and the cover plate includes an inclined guide surface arranged close to one side of the liquid filling port, so that after the external force disappears, the movable part returns along the inclined guide surface to close the liquid filling port and the liquid outlet under the elastic force of the elastic part.

In a specific embodiment, the injection mechanism is provided with an injection channel, and the cover plate is used to close the injection channel when the injection mechanism is not subjected to external force, and when the injection mechanism is subjected to the external force, the injection channel is connected with the liquid storage chamber; or the injection mechanism includes an inclined drainage surface arranged close to one side of the injection port, and when the injection mechanism is subjected to external force, the inclined drainage surface and the cover plate form an injection gap connected with the liquid storage chamber.

In order to solve the above technical problems, another technical solution adopted in the present application is: providing a shell, the shell includes a shell body and the cover plate assembly, the shell body forms a accommodating space, the accommodating space is used to accommodate the core package and common electrolyte, the cover plate is covered in the accommodating space and the liquid outlet is connected to the accommodating space.

In order to solve the above technical problems, another technical solution adopted in the present application is: to provide a battery, the battery comprising a core pack and the shell, the core pack being arranged in the accommodating space.

The beneficial effects of the present application are as follows: different from the prior art, the cover plate assembly provided in the embodiment of the present application includes: a cover plate, formed with a liquid filling port; a liquid storage tank, connected to the cover plate, the liquid storage tank forming a liquid storage cavity and a liquid outlet, the liquid storage cavity is used to store spare electrolyte and is respectively connected to the liquid filling port and the liquid outlet; a liquid filling mechanism, used to close or open the liquid outlet, so that when the liquid filling mechanism opens the liquid outlet, the spare electrolyte stored in the liquid storage cavity is discharged from the liquid outlet to complete the liquid replenishment operation, thereby avoiding the problem that the commonly used electrolyte in the accommodating space is gradually consumed during the circulation process, resulting in poor cycle performance, thereby reducing the cycle life of the battery.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a cross-sectional schematic diagram of a housing embodiment provided by the application;

FIG2 is a cross-sectional schematic diagram of the cover plate assembly in FIG1 ;

FIG3 is a cross-sectional schematic diagram of the cover plate and the liquid storage bin in FIG2 ;

FIG4 is a cross-sectional schematic diagram of a state where the liquid injection mechanism in FIG2 opens the liquid outlet;

FIG5 is a cross-sectional schematic diagram of another embodiment of the liquid injection mechanism in FIG2 closing the liquid outlet;

FIG6 is a cross-sectional schematic diagram of a state where the liquid injection mechanism in FIG5 opens the liquid outlet;

FIG7 is a cross-sectional schematic diagram of a state where the liquid injection mechanism in FIG2 opens the liquid injection port;

FIG8 is a cross-sectional schematic diagram of another embodiment of the liquid injection mechanism in FIG2 ;

FIG9 is a cross-sectional schematic diagram of a state in which the injection channel and the liquid storage chamber are connected in FIG8;

FIG10 is a cross-sectional schematic diagram of another embodiment of the liquid injection mechanism in FIG1 ;

FIG. 11 is a schematic cross-sectional view of a state in which the inclined drainage surface in FIG. 10 forms a liquid injection gap.

Figure numerals: shell 10; shell body 10a; cover assembly 10b; accommodating space 101; cover 11; liquid storage tank 12; injection mechanism 13; injection port 102; liquid storage chamber 103; liquid outlet 104; movable part 131; elastic part 132; first closed body 1311; second closed body 1312; inclined guide surface 11a; injection channel 105; inclined drainage surface 13a; injection gap 106.

Detailed ways

The present application is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is particularly noted that the following implementation methods are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following implementation methods are only some implementation methods of the present application rather than all implementation methods. All other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

The terms "first", "second" and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, and the manner is such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the implementation mode of this application are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. The manner, such as a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Please refer to FIG. 1 , which is a cross-sectional schematic diagram of an embodiment of a housing 10 provided in the application. The housing 10 in this embodiment includes a housing body 10 a and a cover assembly 10 b .

The shell body 10a is formed with a containing space 101, and the containing space 101 is used to accommodate the core pack (not shown in the figure) and the common electrolyte. The function of the common electrolyte is to perform a cyclic redox reaction during the operation of the battery.

Please refer to Figures 2 and 3 together. Figure 2 is a cross-sectional schematic diagram of the cover plate assembly 10b in Figure 1, and Figure 3 is a cross-sectional schematic diagram of the cover plate 11 and the liquid storage bin 12 in Figure 2. The cover plate assembly 10b includes the cover plate 11, the liquid storage bin 12 and the liquid injection mechanism 13.

The cover plate 11 is disposed on the accommodating space 101 and is formed with a liquid injection port 102 . In practical applications, the cover plate 11 can be made of metal material or plastic, for example, the cover plate 11 is made of aluminum or aluminum alloy material.

Furthermore, the liquid storage bin 12 is connected to the cover plate 11 . In this embodiment, the liquid storage bin 12 is connected to the cover plate 11 at a side of the cover plate 11 close to the accommodating space 101 .

The liquid storage tank 12 is formed with a liquid storage cavity 103 and a liquid outlet 104 . The liquid storage cavity 103 is used to store spare electrolyte and is connected to the liquid injection port 102 and the liquid outlet 104 , respectively.

Please refer to Figures 2 and 4 together. Figure 4 is a cross-sectional schematic diagram of the state in which the injection mechanism 13 in Figure 2 opens the liquid outlet 104. The injection mechanism 13 is used to close or open the liquid outlet 104. In the present embodiment, that is, the injection mechanism 13 is used to close the liquid outlet 104 when no external force is applied, as shown in Figure 2, so that the spare electrolyte in the liquid storage chamber 103 will not be injected into the accommodating space 101. When the injection mechanism 13 is applied with an external force, as shown in Figure 4, the liquid outlet 104 is opened, so that the spare electrolyte stored in the liquid storage chamber 103 is discharged from the liquid outlet 104. In the present embodiment, the spare electrolyte is discharged into the accommodating space 101, thereby completing the liquid replenishment operation, thereby avoiding the common electrolyte in the accommodating space 101 from being gradually consumed during the circulation process, resulting in poor cycle performance, thereby reducing the cycle life of the battery.

It can be understood that the above-mentioned common electrolyte and backup electrolyte are named only to distinguish between the two. In actual applications, the two are the same type of electrolyte. When the battery is generated, the common electrolyte undergoes a cyclic redox reaction. When the common electrolyte is gradually consumed during the circulation process, the backup electrolyte is injected into the accommodating space 101. The backup electrolyte injected into the accommodating space 101 is the same as the above-mentioned common electrolyte and also undergoes a cyclic redox reaction.

Furthermore, the injection mechanism 13 in the present embodiment is also used to close or open the injection port 102. Specifically, when the injection mechanism 13 is not subjected to external force, as shown in FIG. 2 , the liquid outlet 104 is closed, so that when no external force is applied, the injection port 102 is closed by the injection mechanism 13, thereby closing the liquid storage cavity 103 and the accommodating space 101. This can not only prevent external dust and other impurities from entering the liquid storage cavity 103 and the accommodating space 101 through the injection port 102 to contaminate the standby electrolyte in the liquid storage cavity 103 and the common electrolyte in the accommodating space 101, but also prevent the standby electrolyte in the liquid storage cavity 103 and the common electrolyte in the accommodating space 101 from evaporating.

Please refer to Figures 2, 4, 5 and 6. Figure 5 is a cross-sectional schematic diagram of another embodiment of the liquid injection mechanism 13 in Figure 2 closing the liquid outlet 104, and Figure 6 is a cross-sectional schematic diagram of the liquid injection mechanism 13 in Figure 5 opening the liquid outlet 104.

Among them, the liquid injection mechanism 13 includes a movable part 131 and an elastic part 132, one end of the elastic part 132 is respectively abutted against the cover plate 11 or the liquid storage tank 12, and the other end is abutted against the movable part 131, so that the movable part 131 closes the liquid outlet 104 under the elastic force of the elastic part 132, and the movable part 131 overcomes the elastic force of the elastic part 132 when subjected to external force to open the liquid outlet 104.

Specifically, the movable part 131 includes a first closed body 1311 and a second closed body 1312. The first closed body 1311 is movably arranged in the liquid filling port 102, and the second closed body 1312 is connected to the first closed body 1311. As shown in Figures 2 and 4, the elastic part 132 is respectively abutted against the liquid storage tank 12 and the first closed body 1311, or as shown in Figures 5 and 6, the elastic part 132 is respectively abutted against the cover plate 11 and the second closed body 1312, so that the first closed body 1311 closes the liquid filling port 102 under the elastic force of the elastic part 132, and the second closed body 1312 closes the liquid outlet 104 under the elastic force of the elastic part 132.

In one embodiment as shown in Figures 2 and 4, the elastic member 132 is respectively in contact with the liquid storage tank 12 and the first closed body 1311, and the second closed body 1312 is located on the side of the liquid storage tank 12 away from the liquid storage cavity 103, so that when the first closed body 1311 is subjected to an external force in the first direction A, the second closed body 1312 moves away from the liquid outlet 104 in the direction of the liquid storage cavity 103 toward the liquid outlet 104, thereby opening the liquid outlet 104.

Specifically, in this embodiment, as shown in Figure 2, when the first closed body 1311 is not subjected to the external force in the first direction A, the first closed body 1311 is subjected to the elastic force of the elastic member 132 in the second direction B, so that the first closed body 1311 closes the liquid filling port 102 under the elastic force in the second direction B, and drives the second closed body 1312 to close the liquid outlet 104. As shown in Figure 4, when the first closed body 1311 is subjected to the external force in the first direction A, the first closed body 1311 and the second closed body 1312 move synchronously in the first direction A, so that the second closed body 1312 opens the liquid outlet 104. It can be understood that in this embodiment, the external force applied to the first closed body 1311 is a pressing force.

In another embodiment as shown in Figures 5 and 6, the elastic member 132 is respectively in contact with the cover plate 11 and the second closed body 1312, and the second closed body 1312 is disposed in the liquid storage chamber 103, so that when the first closed body 1311 is subjected to an external force in the second direction B, the second closed body 1312 moves away from the liquid outlet 104 in the direction of the liquid storage chamber 103 away from the liquid outlet 104, thereby opening the liquid outlet 104.

Specifically, in this other embodiment, as shown in Figure 5, when the first closed body 1311 is not subjected to the external force in the second direction B, the second closed body 1312 is subjected to the elastic force of the elastic member 132 in the first direction A, so that the second closed body 1312 closes the liquid outlet 104 under the elastic force in the first direction A, and drives the first closed body 1311 to close the liquid injection port 102. As shown in Figure 6, when the first closed body 1311 is subjected to the external force in the second direction B, the first closed body 1311 and the second closed body 1312 move synchronously in the second direction B, so that the second closed body 1312 opens the liquid outlet 104. It can be understood that in this other embodiment, the external force applied to the first closed body 1311 is a pulling force.

It can be understood that although the liquid injection port 102 and the liquid outlet 104 are closed or opened synchronously in the above description, in other embodiments, the liquid injection port 102 and the liquid outlet 104 may not be closed or opened synchronously. For example, the first closed body 1311 and the second closed body 1312 can be set as two independent structures. The first closed body 1311 can close or open the liquid injection port 102 alone, and the second closed body 1312 can close or open the liquid outlet 104 alone.

Please refer to FIG. 7 , which is a cross-sectional schematic diagram of the state in which the liquid injection mechanism 13 in FIG. 2 opens the liquid injection port 102 . In this embodiment, the movable member 131 of the liquid injection mechanism 13 is also used to open the liquid injection port 102 when subjected to an external force.

Specifically, after the spare electrolyte in the liquid storage chamber 103 is injected into the accommodating space 101, in order to further improve the cycle life of the battery, the liquid injection port 102 is opened when the movable part 131 is subjected to external force, so that in actual application, new electrolyte can be injected into the liquid storage chamber 103 through the liquid injection port 102.

The cover plate 11 includes an inclined guide surface 11 a disposed near the liquid injection port 102 , so that after the external force disappears, the movable member 131 returns along the inclined guide surface 11 a to close the liquid injection port 102 and the liquid outlet 104 under the elastic force of the elastic member 132 .

For example, the first closed body 1311 of the movable part 131 is subjected to an external force in the first direction A as shown in Figure 7. If the liquid injection port 102 needs to be opened, the first closed body 1311 needs to be completely moved into the liquid storage chamber 103. When the external force disappears, if the first closed body 1311 is tilted, the first closed body 1311 will be stopped by the cover plate 11 and will not be able to return to the state of closing the liquid injection port 102. In the present embodiment, through the setting of the inclined guide surface 11a, even if the first closed body 1311 is tilted, under the action of the elastic force of the elastic part 132, the first closed body 1311 will also return to the state of closing the liquid injection port 102 along the inclined guide surface 11a, and drive the second closed body 1312 to close the liquid outlet 104.

Please refer to Figures 8 and 9 together. Figure 8 is a cross-sectional schematic diagram of another embodiment of the injection mechanism 13 in Figure 2, and Figure 9 is a cross-sectional schematic diagram of the state in which the injection channel 105 is connected to the liquid storage chamber 103 in Figure 8. In this other embodiment, the injection mechanism 13 is provided with an injection channel 105, and the cover plate 11 is used to close the injection channel 105 when the injection mechanism 13 is not subjected to external force, and when the injection mechanism 13 is subjected to external force, the injection channel 105 is connected to the liquid storage chamber 103.

Specifically, as shown in Figure 8, when the injection mechanism 13 is not subjected to external force, the injection mechanism 13 closes the injection port 102, and at the same time, the cover plate 11 closes the injection channel 105, so that the injection channel 105 and the liquid storage chamber 103 are not connected. When the injection mechanism 13 is subjected to external force, such as the external force in the first direction A as shown in Figure 9, the injection mechanism 13 moves in the first direction A, so that the injection channel 105 is connected with the liquid storage chamber 103. At this time, new electrolyte can be injected into the liquid storage chamber 103 through the injection channel 105. It can be understood that in actual application, when the injection channel 105 is connected with the liquid storage chamber 103, it can also ensure that the injection port 102 itself is still closed by the injection mechanism 13. Compared with the method of directly opening the injection port 102 and injecting new electrolyte into the liquid storage chamber 103 through the injection port 102, external impurities such as dust can be prevented from entering the liquid storage chamber 103 through the injection port 102.

Please refer to Figures 10 and 11 together. Figure 10 is a cross-sectional schematic diagram of another embodiment of the liquid injection mechanism 13 in Figure 1, and Figure 11 is a cross-sectional schematic diagram of the state in which the inclined drainage surface 13a in Figure 10 forms an injection gap 106. In this another embodiment, the liquid injection mechanism 13 includes an inclined drainage surface 13a arranged on one side close to the liquid injection port 102. The liquid injection mechanism 13 is used to form an injection gap 106 that is connected to the liquid storage chamber 103 between the inclined drainage surface 13a and the cover plate 11 when subjected to external force.

Specifically, as shown in Figure 10, when the injection mechanism 13 is not acted upon by external force, the injection mechanism 13 closes the injection port 102. When the injection mechanism 13 is acted upon by external force, such as an external force in the first direction A as shown in Figure 11, the injection mechanism 13 moves in the first direction A, thereby forming an injection gap 106 between the inclined drainage surface 13a and the cover plate 11. At this time, new electrolyte can be injected into the liquid storage chamber 103 through the injection gap 106.

The embodiment of the present application further provides a battery, which includes a core pack and the shell 10 in the above embodiment, and the core pack is disposed in the accommodating space 101 .

Different from the prior art, the cover plate assembly provided in the embodiment of the present application includes: a cover plate, formed with a liquid filling port; a liquid storage tank, connected to the cover plate, the liquid storage tank formed with a liquid storage cavity and a liquid outlet, the liquid storage cavity is used to store spare electrolyte and is respectively connected to the liquid filling port and the liquid outlet; a liquid filling mechanism, used to close or open the liquid outlet, so that when the liquid filling mechanism opens the liquid outlet, the spare electrolyte stored in the liquid storage cavity is discharged from the liquid outlet to complete the liquid replenishment operation, thereby avoiding the common electrolyte in the accommodating space from being gradually consumed during the circulation process, resulting in poor cycle performance, thereby reducing the cycle life of the battery.

The above description is only a partial implementation method of the present application, and does not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims (10)

1. A cover plate assembly, characterized in that the cover plate assembly comprises: A cover plate formed with a liquid injection port; A liquid storage bin connected to the cover plate, the liquid storage bin is formed with a liquid storage cavity and a liquid outlet, the liquid storage cavity is used to store spare electrolyte and is respectively connected to the liquid injection port and the liquid outlet; The liquid injection mechanism is used to close or open the liquid outlet. 2 . The cover plate assembly according to claim 1 , wherein the liquid injection mechanism is movably disposed on the cover plate, and the liquid injection mechanism is also used to close or open the liquid injection port. 3. The cover plate assembly according to claim 1 or 2 is characterized in that the injection mechanism includes a movable part and an elastic part, one end of the elastic part abuts against the cover plate or the liquid storage tank, and the other end abuts against the movable part, so that the movable part closes the liquid outlet under the elastic force of the elastic part, and the movable part overcomes the elastic force of the elastic part to open the liquid outlet when subjected to external force. 4. The cover assembly according to claim 3 is characterized in that the movable part includes a first closed body and a second closed body, the first closed body is movably arranged in the liquid filling port, the second closed body is connected to the first closed body, the elastic part is respectively abutted against the liquid storage tank and the first closed body, or the elastic part is respectively abutted against the cover and the second closed body, so that the first closed body closes the liquid filling port under the elastic force of the elastic part, and the second closed body closes the liquid outlet under the elastic force of the elastic part. 5. The cover assembly according to claim 4 is characterized in that the elastic member is respectively in contact with the liquid storage tank and the first closed body, and the second closed body is located on the side of the liquid storage tank away from the liquid storage cavity, so that when the first closed body is subjected to an external force in a first direction, the second closed body moves away from the liquid outlet in the direction of the liquid storage cavity toward the liquid outlet. 6. The cover assembly according to claim 4 is characterized in that the elastic member is respectively in contact with the cover and the second closed body, and the second closed body is arranged in the liquid storage cavity, so that when the first closed body is subjected to an external force in a second direction, the second closed body moves away from the liquid outlet in the direction in which the liquid storage cavity is away from the liquid outlet. 7. The cover assembly according to claim 3 is characterized in that the movable part is also used to open the liquid injection port when subjected to the external force, and the cover includes an inclined guide surface arranged close to one side of the liquid injection port, so that after the external force disappears, the movable part returns along the inclined guide surface to close the liquid injection port and the liquid outlet under the elastic force of the elastic part. 8. The cover plate assembly according to claim 1, characterized in that: The liquid injection mechanism is provided with a liquid injection channel, and the cover plate is used to close the liquid injection channel when the liquid injection mechanism is not acted upon by an external force, and when the liquid injection mechanism is acted upon by the external force, the liquid injection channel is communicated with the liquid storage chamber; or The liquid injection mechanism comprises an inclined drainage surface arranged near one side of the liquid injection port, and the liquid injection mechanism is used to form a liquid injection gap connected to the liquid storage cavity between the inclined drainage surface and the cover plate when subjected to external force. 9. A shell, characterized in that the shell comprises a shell body and a cover plate assembly as described in any one of claims 1 to 8, the shell body is formed with a accommodating space, the accommodating space is used to accommodate a core package and a common electrolyte, the cover plate is covered in the accommodating space and the liquid outlet is connected to the accommodating space. 10 . A battery, characterized in that the battery comprises a core pack and the shell according to claim 9 , wherein the core pack is arranged in the accommodating space.