Battery, battery module and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery, a battery module and electric equipment. The battery comprises a battery body, an internal cavity contains battery liquid, the wall surface of the battery body is provided with a first through hole and a second through hole, the first through hole is covered with a first pressure film, and the second through hole is covered with a second pressure film; the first cavity is arranged on the outer side of the battery body and is connected with the first through hole; the second cavity is arranged on the outer side of the battery body and connected with the second through hole, and supplement liquid is contained in the second cavity; the first pressure film is suitable for being damaged under the action of pressure, and enables the first cavity to communicate with the inner cavity; the second pressure film is suitable for being damaged under the action of pressure and enables the second cavity to be communicated with the inner cavity so that the supplementary liquid can flow into the inner cavity. According to the utility model, the pressure relief and liquid supplement functions of the internal chamber can be realized, the internal space of the battery body is not occupied, and the improvement of the battery performance and the reduction of the manufacturing cost are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and specifically relates to batteries, battery modules and electrical equipment. Background Art

[0002] Lithium batteries are one of the common types of batteries in the new energy field. At present, common lithium batteries usually contain electrolytes inside the batteries. During the battery charge and discharge cycle, due to the internal electrochemical reaction, the electrolyte inside the battery is consumed and the gas generated continues to increase. With the consumption of electrolyte and the increase in gas production, the temperature inside the battery increases sharply, and the gas pressure is too high, causing the battery to explode and burn. Utility Model Content

[0003] In view of this, in order to improve at least one of the above problems existing in the prior art, the utility model provides a battery, a battery module and an electrical device.

[0004] The first technical solution of the utility model provides a battery, including: a battery body, an internal cavity of the battery body containing battery liquid, a first through hole and a second through hole are provided on the wall surface of the battery body, the first through hole is covered with a first pressure membrane, and the second through hole is covered with a second pressure membrane; a first cavity is arranged on the outside of the battery body and connected to the first through hole; a second cavity is arranged on the outside of the battery body and connected to the second through hole, and supplementary liquid is contained in the second cavity; wherein the first pressure membrane is suitable for being damaged under the action of pressure and communicating the first cavity with the internal cavity of the battery body; the second pressure membrane is suitable for being damaged under the action of pressure and communicating the second cavity with the internal cavity of the battery body, so that the supplementary liquid in the second cavity flows into the internal cavity.

[0005] In a feasible implementation, there are multiple first through holes, each of which is covered with a first pressure film; the first cavity is provided with multiple first connection ports, and each first connection port is connected to one of the first through holes; and / or

[0006] There are multiple second through holes, and each second through hole is covered with a second pressure film; the second cavity is provided with multiple second connecting ports, and each second connecting port is connected to one of the second through holes.

[0007] In a feasible implementation, there are two first through holes and two first connecting ports, and the first cavity is a curved tube structure; and / or

[0008] There are two second through holes and two second connecting ports, and the second cavity is a bent pipe structure.

[0009] In a feasible implementation, the pressure threshold of the second pressure membrane is greater than the pressure threshold of the first pressure membrane.

[0010] In a feasible implementation, the first cavity is connected to the second cavity, and a third pressure membrane is provided at the connection point between the first cavity and the second cavity.

[0011] In a feasible implementation, the pressure thresholds of the third pressure membrane and the second pressure membrane are both greater than the pressure threshold of the first pressure membrane.

[0012] In a feasible implementation, the first cavity and the second cavity are both bent tube structures, and an end of the first cavity away from the battery body is connected to an end of the second cavity away from the battery body.

[0013] In a feasible implementation, the first cavity is connected to the second cavity to form an arched tube structure; wherein the connection between the first cavity and the second cavity is located at the highest point of the arched tube structure.

[0014] The second technical solution of the utility model provides a battery module, including: the battery in any one of the above-mentioned first aspects.

[0015] The third aspect of the present invention provides an electrical device, comprising: a battery module as described in any one of the second aspects.

[0016] The beneficial effects of the above technical solution of the utility model are embodied in:

[0017] The structural form of the battery is improved by arranging the first cavity and the second cavity on the outside of the battery body so that when the internal pressure of the battery body reaches a preset value, the first cavity and the second cavity are respectively connected to the inside of the battery body, thereby releasing the internal pressure and replenishing the electrolyte or lithium solution. There is no need to occupy the internal space of the battery body and will not affect the battery performance. Compared with existing batteries, the battery structure is simplified, which is conducive to reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a side schematic diagram of a battery provided by an embodiment of the utility model.

[0019] Figure 2 Shown is a top view of a battery provided by an embodiment of the utility model.

[0020] Figure 3 Shown is a partially exploded schematic diagram of a battery provided by an embodiment of the utility model in a top view.

[0021] Figure 4 Shown is a partially exploded schematic diagram of another battery provided by an embodiment of the utility model in a top view.

[0022] Figure 5Shown is a side schematic diagram of another battery provided by an embodiment of the utility model.

[0023] Figure 6 Shown is a top view of another battery provided by an embodiment of the utility model.

[0024] Figure 7 Shown is a partially exploded schematic diagram of another battery provided by an embodiment of the utility model in a top view.

[0025] Figure 8 Shown is a side schematic diagram of another battery provided by an embodiment of the utility model.

[0026] Fig. 9 Shown is a top view of another battery provided by an embodiment of the utility model.

[0027] Fig.10 Shown is a partially exploded schematic diagram of another battery provided by an embodiment of the utility model in a top view.

[0028] Fig.11 Shown is a schematic block diagram of a battery module provided by an embodiment of the utility model.

[0029] Fig.12 The figure shows a schematic block diagram of an electric device provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0030] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0031] In addition, the 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.

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Application Overview

[0034] Some embodiments of the battery, battery module and electrical equipment in the technical solution of the utility model are provided below.

[0035] In one embodiment of the first aspect of the present invention, a battery 100 is provided, such as Figure 1 , Figure 2 and Figure 3 As shown, the battery 100 includes a battery body 1, a first cavity 2 and a second cavity 3. The internal cavity 11 of the battery body 1 contains battery liquid, which includes but is not limited to electrolyte and lithium supplement liquid; a first through hole 12 and a second through hole 13 are provided on the wall of the battery body 1, and the first through hole 12 is covered with a first pressure membrane 21, and the second through hole 13 is covered with a second pressure membrane 31. The first cavity 2 and the second cavity 3 are both arranged on the outside of the battery body 1, and the first cavity 2 is connected to the first through hole 12, and the second cavity 3 is connected to the second through hole 13; wherein, the air pressure in the first cavity 2 can be less than or equal to the air pressure in the battery body 1, and the second cavity 3 contains supplement liquid, which can have the same composition and concentration as the battery liquid, or the same composition as the battery liquid but different concentration, or only part of the battery liquid, or other liquids that are different from the battery liquid but can alleviate the problem of lithium deficiency in the battery.

[0036] It should be noted that the lithium replenishing solution in this solution is a solution for lithium-ion batteries. If the battery is a sodium-ion battery or a magnesium-ion battery, problems such as sodium deficiency and magnesium deficiency will occur. Accordingly, sodium replenishing solution, magnesium replenishing solution, etc. can be provided.

[0037] Under normal conditions, the first through hole 12 is covered by the first pressure membrane 21, so that the first cavity 2 is isolated from the internal cavity of the battery body 1. Similarly, the second through hole 13 is covered by the second pressure membrane 31, so that the second cavity 3 is isolated from the internal cavity of the battery body 1. Both the first pressure membrane 21 and the second pressure membrane 31 have a certain pressure threshold. Under the action of pressure, both the first pressure membrane 21 and the second pressure membrane 31 can be damaged when the pressure they are subjected to exceeds their own pressure threshold; when the first pressure membrane 21 is damaged, the first cavity 2 is connected to the internal cavity 11 of the battery body 1, and the gas pressure in the internal cavity 11 can be released to achieve a pressure relief effect; when the second pressure membrane 31 is damaged, the second cavity 3 is connected to the internal cavity 11 of the battery body 1, and the supplementary liquid in the second cavity 3 can flow into the internal cavity 11 to replenish the battery liquid in the internal cavity 11 to achieve a liquid replenishment effect.

[0038] It should be noted that the first cavity 2 and the second cavity 3 are not limited to Figure 1 and Figure 2 The number and location of the first and second cavities 2 and 3 can also be set according to specific usage and assembly requirements. For example, the first cavity 2 and the second cavity 3 can also be set on the side wall of the battery body 1, or respectively set on different walls of the battery body 1. The first cavity 2 and the second cavity 3 can be connected and fixed to the battery body 1 by welding.

[0039] In addition, the first cavity 2 and the second cavity 3 are not limited to Figure 1 and Figure 2 The square structure shown can also be set to other structural forms according to actual conditions, such as cylindrical, spherical or other shapes, and the shapes and sizes of the first cavity 2 and the second cavity 3 can also be different.

[0040] In addition, in practical applications, the battery body 1 can be a battery cell or a battery cell including the battery cell. The battery body 1 has conventional structures required for a battery, such as a pole hole 101, poles and other structures.

[0041] It is understood that during the use of the battery, the air pressure in the internal chamber 11 will gradually increase. If the air pressure is too high, there may be a risk of explosion. Similarly, the battery liquid in the internal chamber 11 will gradually decrease, thereby weakening the battery performance. By providing the first cavity 2 and the second cavity 3, the internal chamber 11 can be depressurized and replenished.

[0042] The battery 100 in this embodiment improves the structure of the existing battery by arranging the first cavity 2 and the second cavity 3 on the outside of the battery body 1 so that when the internal pressure of the battery body 1 reaches a preset value, the first cavity 2 and the second cavity 3 are respectively connected to the inside of the battery body 1 to release the internal pressure and replenish the battery liquid. This not only does not need to occupy the internal space of the battery body 1 and does not affect the battery performance, but also simplifies the internal structure of the battery, which is conducive to reducing manufacturing costs.

[0043] In a further embodiment of the present invention, Figure 1 and Figure 4 As shown, in one implementation, the number of the first through holes 12 is multiple, for example Figure 4 In the two shown in the figure, each first through hole 12 is covered with a first pressure membrane 21; correspondingly, a plurality of first connection ports are provided on the wall surface of the first cavity 2 opposite to the battery body 1, and the first connection ports correspond one-to-one to the first through holes 12, and each first connection port is connected to a first through hole 12.

[0044] Similarly, in another implementation, the number of the second through holes 13 may also be multiple, for example Figure 4 As shown in the two, each second through hole 13 is covered with a second pressure membrane 31; correspondingly, a plurality of second connection ports are provided on the wall surface of the second cavity 3 opposite to the battery body 1, and the second connection ports correspond one-to-one to the second through holes 13, and each second connection port is connected to a second through hole.

[0045] In this embodiment, by setting a plurality of first through holes 12 and / or a plurality of second through holes 13, and correspondingly setting a plurality of first connecting ports and / or a plurality of second connecting ports, a plurality of connecting channels can be formed between the first cavity 2 and / or the second cavity 3 and the battery body 1, thereby increasing the overall connecting area. The pressure exerted on the pressure membrane can also be adjusted by setting the size of a single first through hole 12 and / or a second through hole 13 to meet the use requirements.

[0046] Furthermore, if Figure 5 , Figure 6 and Figure 7 As shown, in one implementation, there are two first through holes 12 and two first connection ports, and accordingly, the first cavity 2 is specifically a curved tube structure, the ports at both ends of the curved tube structure are the first connection ports, and the two first connection ports are respectively connected to the two first through holes 12, so that the first cavity 2 forms a similar arch structure. The first cavity 2 can form two communication channels with the internal chamber 11 of the battery body 1.

[0047] Similarly, in another implementation, if Figure 5 , Figure 6 and Figure 7As shown, the number of the second through hole 13 and the second connection port are both two, and accordingly, the second cavity 3 is specifically a curved tube structure, the ports at both ends of the curved tube structure are the second connection ports, and the two second connection ports are respectively connected to the two second through holes 13, so that the second cavity 3 forms a similar arch structure. The second cavity 3 can form two communication channels with the internal chamber 11 of the battery body 1.

[0048] In this embodiment, the first cavity 2 and / or the second cavity 3 forms an arch structure through a curved pipe structure. The cross-sectional size of the curved pipe structure at any position is the same, and the inner wall surface is relatively smooth. When connected to the internal cavity, the flow velocity of the gas or supplementary liquid can remain relatively stable when flowing in the curved pipe structure, which is beneficial to prevent local air flow shock or liquid flow shock, thereby reducing safety risks.

[0049] Furthermore, in the above embodiment, the pressure threshold of the second pressure membrane 31 is greater than the pressure threshold of the first pressure membrane 21, that is, the second pressure membrane 31 per unit area can withstand greater pressure than the first pressure membrane 21. Since the second cavity 3 contains supplementary liquid, the weight of the supplementary liquid will also generate a certain pressure on the second pressure membrane 31. Compared with the first cavity 2, by setting the second pressure membrane 31 to have a larger pressure threshold, when the pressure in the internal chamber 11 increases, the first pressure membrane 21 can be damaged before the second pressure membrane 31, and the internal chamber 11 is depressurized first, thereby reducing the risk of explosion. Among them, the specific size of the pressure threshold of the first pressure membrane 21 and the second pressure membrane 31 can be set according to the battery performance requirements.

[0050] It can be understood that, since the space of the internal chamber 11 of the battery body 1 is limited, when the air pressure of the internal chamber 11 increases, if the second pressure membrane 31 is damaged before the first pressure membrane 21, the supplementary liquid in the second cavity 3 will flow into the internal chamber 11, that is, the liquid replenishment process is performed first, so that the remaining space of the internal chamber 11 is further reduced, which may further increase the air pressure and increase the safety risk. By setting the pressure threshold in this embodiment, the above situation can be prevented, thereby effectively reducing the safety risk.

[0051] In a further embodiment of the present invention, Figure 8 , Fig. 9 and Fig.10As shown, the first cavity 2 of the battery is connected to the second cavity 3, and a third pressure membrane 33 is provided at the connection point between the first cavity 2 and the second cavity 3. When in use, when the first pressure membrane 21 is damaged, the first cavity 2 is connected to the internal cavity 11 of the battery body 1 separately to achieve separate pressure relief treatment; when the second pressure membrane 31 is damaged, the second cavity 3 can be connected to the internal cavity 11 of the battery body 1 separately to achieve liquid replenishment treatment; and when the first pressure membrane 21, the second pressure membrane 31 and the third pressure membrane 33 are all damaged, the internal cavity 11 of the battery body 1 is connected to the first cavity 2 and the second cavity 3 at the same time, and the first cavity 2 and the second cavity 3 are also connected, forming a closed circulation communication channel, thereby further enhancing the pressure relief capacity, which is conducive to further reducing safety risks.

[0052] It should be noted that, according to different actual use requirements, there can be one or more communicating ports between the first cavity 2 and the second cavity 3 , and each communicating port is provided with a third pressure membrane 33 .

[0053] Furthermore, if Figure 8 , Fig. 9 and Fig.10 As shown, the pressure thresholds of the third pressure membrane 33 and the second pressure membrane 31 are both greater than the pressure threshold of the first pressure membrane 21. Since the second cavity 3 contains supplementary liquid, the weight of the supplementary liquid will also generate a certain pressure on the second pressure membrane 31 and the third pressure membrane 33. Compared with the first cavity 2, by setting the second pressure membrane 31 and the third pressure membrane 33 to have a larger pressure threshold, when the pressure in the internal chamber 11 increases, the first pressure membrane 21 can be damaged before the second pressure membrane 31 and the third pressure membrane 33, and the internal chamber 11 is depressurized first, thereby reducing the risk of explosion. Among them, the specific sizes of the pressure thresholds of the first pressure membrane 21, the second pressure membrane 31 and the third pressure membrane 33 can be set according to the battery performance requirements.

[0054] Preferably, the pressure threshold of the third pressure membrane 33 is the same as the pressure threshold of the second pressure. Under the action of pressure, the third pressure membrane 33 and the second pressure membrane 31 can be damaged at the same time, or the third pressure membrane 33 can be damaged later than the second pressure membrane 31, so that after the replenishing liquid in the second cavity 3 flows into the internal chamber 11 of the battery body 1 to complete the liquid replenishment, the second cavity 3 can form a circularly connected structure with the first cavity 2 and the internal chamber 11. The second cavity 3 and the first cavity 2 jointly play a pressure relief role, which can further enhance the overall pressure relief capacity and help to further reduce safety risks.

[0055] Furthermore, if Figure 8 , Fig. 9 and Fig.10As shown, the first cavity 2 and the second cavity 3 are bent tube structures, and the two bent tube structures are arranged opposite to each other; wherein, the port at one end of the first cavity 2 is the first connecting port, and is connected to the first through hole 12, and one end of the second cavity 3 is the second connecting port, and is connected to the second through hole 13; the other end of the first cavity 2 is connected to the other end of the second cavity 3, and a third pressure membrane 33 is provided at the connection, so that the first cavity 2 and the second cavity 3 are isolated from each other.

[0056] In this embodiment, by setting the first cavity 2 and the second cavity 3 to adopt a curved tube structure, the cross-sectional size at any position of the curved tube structure is the same and the inner wall surface is relatively smooth. When the gas or supplementary liquid flows in the curved tube structure when connected to the internal cavity, the flow rate can remain relatively stable, which is conducive to preventing local air flow shock or liquid flow shock, thereby reducing safety risks. In addition, compared with the split first cavity 2 and the second cavity 3, the first cavity 2 and the second cavity 3 in this embodiment are connected, which can reduce the welding area of ​​the connection between the first cavity 2 and the second cavity 3 and the battery body 1 accordingly, which can simplify the structure of the battery body 1 to a certain extent, and is conducive to optimizing the layout and assembly.

[0057] Furthermore, if Figure 8 In the example, the first cavity 2 is connected to the second cavity 3 to form an arched tube structure, that is, the two curved tube structures are combined to form an integral arched tube structure, so that the overall cross-sectional size of the arched tube structure is maintained the same. When gas or supplementary liquid flows in the arched tube structure, it can maintain a relatively smooth flow whether in the area of ​​the first cavity 2 or in the area of ​​the second cavity 3, thereby preventing local impact and further reducing safety risks.

[0058] The connection between the first cavity 2 and the second cavity 3 is located at the highest point of the arch tube structure, so that the internal volume of the first cavity 2 is equal to the internal volume of the second cavity 3, forming a bilaterally symmetrical structure. On the one hand, the overall force can be more balanced, and on the other hand, the first cavity 2 and the second cavity 3 can be used universally, and only two curved tube structures of the same structure need to be connected and assembled relative to each other, which is conducive to simplifying processing and reducing manufacturing costs.

[0059] It can be understood that if the connection between the first cavity 2 and the second cavity 3 is located on the side of the arched tube structure close to the first cavity 2, the internal volume of the first cavity 2 is smaller than the internal volume of the second cavity 3, which correspondingly reduces the pressure relief volume of the first cavity 2 and reduces the pressure relief capacity; if the connection between the first cavity 2 and the second cavity 3 is located on the side of the arched tube structure close to the second cavity 3, the internal volume of the second cavity 3 is smaller than the internal volume of the first cavity 2, which correspondingly reduces the liquid storage volume of the second cavity 3 and reduces the amount of fluid replenishment. Therefore, setting the connection between the first cavity 2 and the second cavity 3 at the highest point of the arched tube structure can balance the needs of pressure relief and fluid replenishment.

[0060] Furthermore, in the above embodiment, if Figure 1 , Figure 5 and Figure 8 In the example, the first cavity 2 and the second cavity 3 are preferably arranged on the top wall of the battery body 1, which can make full use of the space on the top wall of the battery body 1 and reduce the occupation of other walls of the battery body 1. When multiple batteries 100 form a battery module, it can be easy to assemble and connect, and at the same time, the arrangement of multiple batteries 100 can be made more compact, which is conducive to reducing the volume of the battery module.

[0061] Understandably, usually, Figure 2 As shown, conventional structures such as poles are provided on the top wall of the battery body 1. When multiple batteries 100 form a battery module, appropriate space is reserved for the top surface of the battery body 1 between the multiple batteries 100. If the first cavity 2 and the second cavity 3 are provided on other walls of the battery body 1 (e.g., on the side walls), additional installation space needs to be reserved at positions corresponding to the side walls of the multiple battery bodies 1, which increases the spacing between the batteries 100, thereby increasing the overall volume of the battery module.

[0062] When the first cavity 2 and the second cavity 3 are arranged on the top surface of the battery body 1, the existing reserved space can be used for arrangement, so there is no need to provide additional installation space for the first cavity 2 and the second cavity 3. The overall structure of the battery module is less changed, and it can be adapted to the structure of the existing battery module, which is conducive to reducing costs.

[0063] It should be noted that the curved pipe structure adopted by the first cavity 2 and the second cavity 3 in the above embodiment is only one of the preferred implementation modes of the utility model. In practical applications, the first cavity 2 and the second cavity 3 are not limited to the curved pipe structure, and other structural forms may also be adopted.

[0064] For example, Figure 1For example, the first cavity 2 and the second cavity 3 can be in the form of a square structure or a cylindrical structure, and connection ports are respectively provided on the first cavity 2 and the second cavity 3, and the first cavity 2 and the second cavity 3 are connected through a separate connecting pipeline, and a corresponding pressure membrane is provided at the corresponding connection port or in the connecting pipeline. The connecting pipeline can adopt a hard tube body or a soft tube body according to the use requirements. When the pressure membrane is damaged under the action of pressure, the communication between the first cavity 2 and the second cavity 3 can also be achieved. The principle is the same as Figure 8 The examples are similar and will not be repeated here.

[0065] In the embodiment of the second aspect of the present utility model, a battery module 400 is also provided. Figures 1 to 11 As shown, the battery module 400 includes the battery 100 in any embodiment of the first aspect described above. The number of the battery 100 can be one or more, and the specific number can be set accordingly according to actual use needs.

[0066] Preferably, a plurality of batteries 100 are disposed in the battery module 400 and connected in series or in parallel to form a whole, so as to increase the battery capacity of the battery module 400 .

[0067] By adopting the battery 100 in any embodiment of the first aspect above, the first cavity 2 and the second cavity 3 are arranged on the outside of the battery body 1, the battery structure is optimized, and the pressure relief and fluid replenishment function can be realized, thereby improving the overall performance of the battery module 400 and reducing the safety risk of the battery module 400.

[0068] Furthermore, in practical applications, the battery module 400 may also include conventional structures such as a housing, a mounting base, an adapter, etc. for connecting and fixing the battery, which may be configured according to specific assembly requirements.

[0069] In addition, the battery module 400 in this embodiment also has all the beneficial effects of the battery 100 in any of the above embodiments, which will not be described in detail here.

[0070] In one embodiment of the third aspect of the present utility model, there is also provided an electric device 500, such as Figures 1 to 12 As shown, the electric device 500 includes the battery module 400 in any embodiment of the second aspect. The battery module 400 is used as a power supply device of the electric device 500 to supply power to the electric device 500. In particular, since the battery 100 in any embodiment of the first aspect is used in the battery module 400, the overall performance and safety of the battery module 400 can be effectively improved.

[0071] Furthermore, in practical applications, the electrical equipment 500 includes but is not limited to new energy vehicles.

[0072] In addition, the electrical equipment 500 in this embodiment also has all the beneficial effects of the battery module 400 in any of the above embodiments, which will not be described in detail here.

[0073] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0074] The block diagrams of the devices, apparatuses, equipment and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems can be connected, arranged and configured in any manner. Words such as "including", "comprising", "having" and the like are open words, referring to "including but not limited to" and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to" and can be used interchangeably with them. It should also be noted that in the apparatus and equipment of the present utility model, each component can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present utility model.

[0075] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof. The above description of the disclosed aspects is provided to enable any technician in the field to make or use the utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the utility model. Therefore, the utility model is not intended to be limited to the aspects shown herein, but in accordance with the widest range consistent with the principles and novel features of this utility model.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: A battery body (1), wherein an internal chamber of the battery body (1) contains battery liquid, a first through hole (12) and a second through hole (13) are provided on a wall surface of the battery body (1), the first through hole (12) is covered with a first pressure membrane (21), and the second through hole (13) is covered with a second pressure membrane (31); A first cavity (2) is arranged on the outside of the battery body (1) and is connected to the first through hole (12); A second cavity (3) is arranged on the outside of the battery body (1) and is connected to the second through hole (13); the second cavity (3) contains supplementary liquid; The first pressure membrane (21) is suitable for being damaged under pressure and allowing the first cavity (2) to communicate with the internal cavity of the battery body (1); The second pressure membrane (31) is suitable for being broken under the action of pressure and allowing the second cavity (3) to communicate with the internal cavity of the battery body (1), so that the supplementary liquid in the second cavity (3) flows into the internal cavity.

2. The battery according to claim 1, characterized in that The number of the first through holes (12) is plural, and each of the first through holes (12) is covered with the first pressure film (21); The first cavity (2) is provided with a plurality of first connection ports, and each of the first connection ports is connected to one of the first through holes (12); and / or The number of the second through holes (13) is plural, and each of the second through holes (13) is covered with the second pressure film (31); The second cavity (3) is provided with a plurality of second connection ports, and each of the second connection ports is connected to one of the second through holes (13).

3. The battery according to claim 2, characterized in that There are two first through holes (12) and two first connecting ports, and the first cavity (2) is a bent pipe structure; and / or There are two second through holes (13) and two second connecting ports, and the second cavity (3) is a bent pipe structure.

4. The battery according to any one of claims 1 to 3, characterized in that: The pressure threshold of the second pressure membrane (31) is greater than the pressure threshold of the first pressure membrane (21).

5. The battery according to claim 1, characterized in that The first cavity (2) is connected to the second cavity (3), and a third pressure membrane (33) is provided at the connection point between the first cavity (2) and the second cavity (3).

6. The battery according to claim 5, characterized in that The pressure-bearing thresholds of the third pressure membrane (33) and the second pressure membrane (31) are both greater than the pressure-bearing threshold of the first pressure membrane (21).

7. The battery according to claim 5, characterized in that The first cavity (2) and the second cavity (3) are both bent tube structures, and an end of the first cavity (2) away from the battery body (1) is connected to an end of the second cavity (3) away from the battery body (1).

8. The battery according to claim 7, characterized in that: The first cavity (2) and the second cavity (3) are connected to form an arched tube structure; Wherein, the connection point between the first cavity (2) and the second cavity (3) is located at the highest point of the arched tube structure.

9. A battery module, characterized in that: include: A battery as claimed in any one of claims 1 to 8.

10. An electrical device, characterized in that: include: The battery module as claimed in claim 9.

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