Battery and electric device

Abstract

The invention discloses a battery which comprises a shell, a battery cell and a trigger device, and the shell is provided with an accommodating cavity; the battery cell is positioned in the accommodating cavity; the triggering device comprises an elastic mechanism, a puncturing mechanism and a restraining mechanism; the elastic mechanism comprises a first end and a second end in the first direction, and the first end is connected with the shell. One end of the puncturing mechanism is connected with the second end of the elastic mechanism, and the other end of the puncturing mechanism is a free end; the restraining mechanism can fix the elastic mechanism and the puncturing mechanism at a first position, the free end and the battery cell are arranged at an interval under the first position, and the elastic mechanism is in a compressed state; when the restraining mechanism fails at the preset temperature, the elastic mechanism releases elastic force to drive the puncturing mechanism to move and extend into the battery cell to puncture the diaphragm. Therefore, in the battery, when an external short circuit occurs, the temperature of the battery rises, the restraint mechanism melts, the elastic mechanism inserts the puncturing mechanism into the battery cell, the diaphragm in the battery cell is punctured, and the battery is internally short-circuited, so that the battery only smokes, and fire and explosion are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to batteries and electrical devices. Background Art

[0002] At present, lithium-ion batteries are widely used in various fields due to their performance advantages. However, lithium-ion batteries may cause the battery temperature to rise sharply due to external short circuit or other conditions, thus causing safety accidents such as fire or explosion.

[0003] Therefore, how to solve the safety accidents such as battery fire or explosion is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In view of this, the present invention provides a battery and an electrical device, which solve the problem of safety accidents such as fire or explosion of the battery.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A battery comprising:

[0007] A housing, wherein the housing is provided with a receiving cavity;

[0008] A battery cell is located in the accommodation cavity;

[0009] A trigger device, the trigger device comprising an elastic mechanism, a puncture mechanism and a restraint mechanism;

[0010] Wherein, the elastic mechanism includes a first end and a second end along a first direction, and the first end is connected to the housing;

[0011] One end of the puncturing mechanism is connected to the second end of the elastic mechanism, and the other end of the puncturing mechanism is a free end;

[0012] The restraining mechanism can fix the elastic mechanism and the puncturing mechanism in a first position. In the first position, the free end of the puncturing mechanism is spaced apart from the battery cell, and the elastic mechanism is in a compressed state. When the restraining mechanism fails at a preset temperature, the elastic mechanism releases its elastic force to drive the puncturing mechanism to move toward the battery cell, and the puncturing mechanism can extend into the interior of the battery cell to puncture the diaphragm inside the battery cell.

[0013] Optionally, in the above battery, the end surface of the first end is provided with a first limiting portion;

[0014] The inner surface of the shell is provided with a second limiting portion;

[0015] One of the first limiting portion and the second limiting portion is a protrusion, and the other is a groove, and the protrusion and the groove are adapted to each other.

[0016] Optionally, in the above battery, the puncturing mechanism comprises a main body and a puncturing portion, and two ends of the main body along the first direction are respectively connected to the elastic mechanism and the puncturing portion;

[0017] Along the first direction, a projection of the main body portion is larger than a projection of the puncture portion.

[0018] Optionally, in the above battery, a sleeve is further included, the sleeve is a guide member for the puncturing portion to move along the first direction, and the elastic mechanism and the puncturing mechanism are accommodated inside the sleeve;

[0019] One end of the sleeve along the first direction is connected to the housing, and the end surface of the other end is provided with a first through hole;

[0020] Along the first direction, the projection of the first through hole at least covers the projection of the puncture portion.

[0021] Optionally, in the above battery, the main body includes a base and an extension portion, and along the first direction, two ends of the extension portion are respectively connected to the base and the piercing portion;

[0022] Along the first direction, the projection of the base covers the projection of the elongated portion, and the projection of the base covers the projection of the first through hole.

[0023] Optionally, in the above battery, the elastic mechanism includes a base and an elastic member, the elastic member is connected to the base, and an end of the base away from the elastic member is the first end.

[0024] Optionally, in the above battery, the restraint mechanism includes an accommodation space opened on the first structural layer for accommodating the puncture mechanism, the elastic mechanism and the sleeve;

[0025] From outside to inside along the first direction, the accommodation space includes a first part, a second part, a third part and a fourth part;

[0026] Wherein, the diameter of the first portion is greater than the diameter of the base; along the first direction, the size of the first portion is equal to the size of the base;

[0027] The diameter of the second portion is smaller than the diameter of the first portion and larger than the diameter of the sleeve; along the first direction, the size of the second portion is equal to the size of the sleeve;

[0028] The diameter of the third portion is smaller than the diameter of the second portion and larger than the diameter of the main body portion; along the first direction, the size of the third portion is greater than or equal to 0;

[0029] The diameter of the fourth portion is smaller than the diameter of the third portion and larger than the diameter of the puncture portion; along the first direction, the size of the fourth portion is larger than the size of the puncture portion and smaller than the compressed size of the elastic mechanism.

[0030] Optionally, in the above battery, the puncturing portion is a conical structure, and the tip of the conical structure is arranged away from the main body.

[0031] Optionally, in the above battery, the shell includes an outer shell and a top cover, the outer shell and the top cover enclose the accommodating cavity, and the first end is connected to the outer shell or the top cover.

[0032] An electrical device comprises the above-mentioned battery.

[0033] In the battery and the electric device provided by the present invention, when an external short circuit or other abnormal state occurs, the internal temperature of the battery rises, the constraint mechanism melts, the constraints of the elastic mechanism and the puncturing mechanism disappear, the puncturing mechanism is inserted into the battery cell through the elastic mechanism, the diaphragm in the battery cell is punctured, and the positive electrode plate in the battery is connected with the negative electrode plate, resulting in an internal short circuit of the battery, so that the battery only smokes, avoiding fire and explosion, and causing greater losses. When the battery is short-circuited externally, due to the small resistance, the current is large, the pole generates heat, the current rises, the heat generation increases sharply, the pole temperature rises rapidly, the plastic layer in the battery is hot-melted, the electrolyte gasifies and contacts with oxygen in the air, the electrolyte is oxidized to generate a large amount of heat, which can cause the battery to catch fire or even explode; in this case, the internal short circuit of the battery will cause part of the current to be shared by the internal short circuit path, and the internal short circuit path is short, the electron path increases, the current passing through the pole position is reduced, the heat generation is reduced, the risk of leakage at the pole is reduced, the battery is not in contact with the air, and no oxidation reaction occurs to generate heat, the battery will not heat up too fast in a short time, and will not catch fire or explode. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0035] Figure 1 It is a structural schematic diagram of a trigger device in an embodiment of the present invention;

[0036] Figure 2is a cross-sectional view of a battery at a target position according to an embodiment of the present invention;

[0037] Figure 3 for Figure 2 A partial enlarged view of

[0038] Figure 4 is a cross-sectional view of a restraining mechanism according to an embodiment of the present invention;

[0039] Figure 5 is a cross-sectional view of a battery under internal short circuit in an embodiment of the present invention;

[0040] Figure 6 for Figure 5 A partial enlarged view of .

[0041] Figure 1-Figure 6 middle:

[0042] 1. Elastic mechanism; 11. Base; 12. Elastic member;

[0043] 2. puncture mechanism; 21. main body; 22. puncture part;

[0044] 3. Constraints;

[0045] 31. Part 1; 32. Part 2; 33. Part 3; 34. Part 4;

[0046] 4. Top cover; 5. Outer shell; 6. Battery cell; 7. Sleeve. DETAILED DESCRIPTION

[0047] The invention provides a battery and an electric device.

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] At present, batteries are developing in the direction of high safety and low internal resistance. In order to avoid fire and explosion caused by temperature rise due to battery short circuit, a fuse is usually set on the adapter. When the battery is short-circuited, the fuse can respond in time, generate a lot of heat and melt, thereby disconnecting the circuit. Then, the fuse structure is generally achieved by reducing the cross-sectional area of ​​the adapter, which will inevitably increase the internal resistance of the battery and reduce the energy conversion efficiency of the battery. Therefore, the inventor of the present application has designed a technical solution that can respond to battery short circuit without increasing the internal resistance of the battery.

[0050] like Figure 1-Figure 6As shown, an embodiment of the present application provides a battery.

[0051] The battery includes a cell and an electrolyte. The cell is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. The current collector not coated with the positive electrode active material layer is stacked as a positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer. The current collector not coated with the negative electrode active material layer is stacked as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. The material of the isolation film can be PP (polypropylene) or PE (polyethylene). In addition, the battery cell can be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto. For the convenience of description, the term "ear" is used below to refer to the positive electrode ear and / or the negative electrode ear.

[0052] First, the battery includes a shell, a battery cell 6 and a trigger device, the shell is provided with a accommodating cavity; the battery cell 6 is located in the accommodating cavity; the trigger device includes an elastic mechanism 1, a puncturing mechanism 2 and a restraining mechanism 3; wherein the elastic mechanism 1 includes a first end and a second end along a first direction, and the first end is connected to the shell; one end of the puncturing mechanism 2 is connected to the second end of the elastic mechanism 1, and the other end of the puncturing mechanism 2 is a free end; the restraining mechanism 3 can fix the elastic mechanism 1 and the puncturing mechanism 2 in a first position, in which the free end of the puncturing mechanism 2 is spaced apart from the battery cell 6 (that is, the free end of the puncturing mechanism 2 does not extend into the battery cell 6 and contact the battery cell 6), and the elastic mechanism 1 is in a compressed state; when the restraining mechanism 3 fails at a preset temperature, the elastic mechanism 1 releases the elastic force, driving the puncturing mechanism 2 to move in the direction of the battery cell 6, and the puncturing mechanism 2 can extend into the interior of the battery cell 6 to puncture the diaphragm in the battery cell 6, thereby electrically connecting the positive electrode plate and the negative electrode plate on both sides of the diaphragm, so that the battery forms an internal short circuit. In a normal state (ie, when the preset temperature has not been reached), the puncturing mechanism 2 is placed in the accommodating cavity of the shell, and the puncturing needle is compressed in the sleeve 7 by the lower plastic.

[0053] It should be noted that the preset temperature is the melting point of the puncture mechanism 2, which is the temperature at which the battery does not catch fire or explode when the battery is short-circuited. At the same time, when the preset temperature is reached, the constraint mechanism 3 reaches the melting point and melts and loses its constraint function; and the preset temperature is not less than the normal operating temperature of the battery, and at the same time, it is ensured that when the battery is not in operation and the storage environment temperature of the battery is high, the constraint mechanism 3 will not melt, and the puncture mechanism 2 will not extend into the battery cell 6 to puncture the diaphragm in the battery cell 6. The preset temperature is between 180°C and 220°C, but is not limited thereto. The specific temperature value of the preset temperature can be specifically designed by those skilled in the art according to actual needs.

[0054] It can be seen that in the battery provided by the present invention, when an external short circuit or other abnormal conditions occur, the internal temperature of the battery rises, the constraint mechanism 3 melts, the constraints of the elastic mechanism 1 and the puncture mechanism 2 disappear, and the puncture mechanism 2 is inserted into the battery cell 6 through the elastic mechanism 1, puncturing the diaphragm in the battery cell 6, and the positive electrode plate and the negative electrode plate in the battery are connected, resulting in an internal short circuit in the battery, so that the battery only smokes, avoiding fire and explosion, causing greater losses. When the battery is short-circuited externally, the resistance is small, resulting in a large current, and the pole generates heat (Q=I 2 Rt), the current (I) rises, the heat generation increases sharply, the temperature of the pole rises rapidly, causing the plastic layer in the battery to melt, the electrolyte vaporizes and contacts with oxygen in the air, the electrolyte is oxidized to generate a large amount of heat, and the battery may catch fire or even explode; in this case, the internal short circuit of the battery will cause part of the current to be shared by the internal short circuit path, and the internal short circuit path is shorter, the electron path increases, the current passing through the pole position is reduced, the heat generation is reduced, and the risk of gas leakage at the pole is reduced. The inside of the battery is not in contact with the air, and no oxidation reaction occurs to generate heat. The battery will not heat up too quickly in a short period of time, and will not catch fire or explode.

[0055] In a specific implementation, the end surface of the first end is provided with a first limiting portion; the inner surface of the shell is provided with a second limiting portion; one of the first limiting portion and the second limiting portion is a protrusion, and the other is a groove, and the protrusion and the groove are adapted. That is, when the first limiting portion is a protrusion, the second limiting portion is a groove adapted to the protrusion; when the first limiting portion is a groove, the second limiting portion is a protrusion adapted to the groove. The cooperation between the two facilitates the positioning and fixing between the trigger device and the shell, and the specific fixing can be but is not limited to the interference connection between the protrusion and the groove. It should be noted that the protruding height range of the protrusion is 0.5mm-1.5mm, specifically, it can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc.; the projection of the protrusion along the first direction is circular, and its diameter range is 0.5mm-5mm, specifically, it can be 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, etc., but is not limited to this. The shape and size of the protrusion can be specifically designed by technical personnel in this field according to actual needs.

[0056] In specific implementation, the puncturing mechanism 2 includes a main body 21 and a puncturing portion 22. The two ends of the main body 21 along the first direction are respectively connected to the elastic mechanism 1 and the puncturing portion 22; along the first direction, the projection of the main body 21 is larger than the projection of the puncturing portion 22. Increasing the contact area between the elastic mechanism 1 and the main body 21 makes the connection more secure, and at the same time can provide a relatively stable and large elastic force for the puncturing portion 22. At the same time, the small size of the puncturing portion 22 can save the volume of the puncturing portion 22 as much as possible, thereby reducing the deadweight of the puncturing mechanism 2 and saving the amount of materials. Most importantly, when the puncturing portion 22 contacts the battery cell 6, due to the small size of the puncturing portion 22, the pressure applied to the battery cell 6 is large enough to facilitate the puncturing portion 22 to extend into the battery cell 6 and puncture the diaphragm in the battery cell 6.

[0057] In a specific implementation, it also includes a sleeve 7, which is a guide for the puncturing portion 22 to move along the first direction. When the elastic mechanism 1 releases the elastic force, the puncturing portion 22 is guided to move along the first direction, so that it can pierce the battery cell 6 more quickly and at a more precise angle. The sleeve 7 accommodates the elastic mechanism 1 and the puncturing mechanism 2; one end of the sleeve 7 along the first direction is connected to the shell, and a first through hole is provided on the end face of the other end; along the first direction, the projection of the first through hole at least covers the projection of the puncturing portion 22, that is, when the preset temperature is reached, the puncturing portion 22 can pass through the first through hole and pierce the battery cell 6. It should be noted that the puncturing portion 22 can be constrained on the inside of the sleeve 7 by the constraint mechanism 3, or it can be constrained on the outside of the sleeve 7 by the constraint mechanism 3 (see for details). Figure 3) At this time, there is a gap between the puncture portion 22 and the battery cell 6 in the first direction. As long as the puncture portion 22 can pierce the battery cell 6 when the constraint mechanism 3 loses its constraint effect, the relative positions of the puncture portion 22, the sleeve 7 and the constraint structure can be specifically designed by those skilled in the art according to actual needs. In addition, the inner diameter of the sleeve 7 is 3.4 mm, and the diameter of the first through hole is 2 mm, but it is not limited to this. The diameters of the sleeve 7 and the first through hole can be specifically designed by those skilled in the art according to actual needs. In order to play the role of the trigger device, the melting point of the sleeve 7 is much higher than the preset temperature.

[0058] In a specific implementation, the main body 21 includes a base and an extension portion. Along the first direction, the two ends of the extension portion are connected to the base and the piercing portion 22 respectively; along the first direction, the projection of the base covers the projection of the extension portion, and the projection of the base covers the projection of the first through hole. That is, in the process of the piercing portion 22 piercing the battery cell 6, the extension portion can pass through the through hole, so that the piercing portion 22 can have a continuous elastic force to move into the battery cell 6, which can ensure that the piercing portion 22 pierces the diaphragm during the movement, and avoids the piercing portion 22 piercing the battery cell 6. The force is suddenly stopped due to the obstruction of the extension portion, causing the piercing portion 22 to be stuck in the battery cell 6, or the piercing portion 22 is ejected from the battery cell 6 along the first direction due to the elastic force, and does not cause damage to the diaphragm, so as not to cause the battery to have an internal short circuit. In addition, the projection of the base covers the projection of the first through hole. In the process of the movement of the piercing portion 22, the base will not pass through the first through hole, which can prevent the piercing mechanism 2 from being separated from the elastic mechanism 1. During the assembly process of the battery, it is convenient to position and install the puncture mechanism 2, the elastic mechanism 1 and the battery. In addition, the diameter of the extension portion is 1.9 mm, but it is not limited thereto. The diameter of the extension portion can be specifically designed by those skilled in the art according to actual needs.

[0059] In a specific implementation, the elastic mechanism 1 includes a base 11 and an elastic member 12, the elastic member 12 is connected to the base 11, and the end of the base 11 away from the elastic member 12 is the first end. It should be noted that the elastic member 12 includes but is not limited to a coil spring, a leaf spring, a disc spring, and a torsion spring. The diameter of the spring is 2.5 mm, but is not limited thereto. The specific structural type and diameter of the elastic member 12 can be specifically designed by those skilled in the art according to actual needs. In addition, the base 11 is an insulating high-temperature resistant structural member, and its temperature resistance is greater than the preset temperature to ensure that at the preset temperature, the base 11 is fixedly connected to the shell and the trigger device can function.

[0060] In a specific implementation, the constraint mechanism 3 includes a storage space opened on the first structural layer for accommodating the puncture mechanism 2, the elastic mechanism 1 and the sleeve 7; along the first direction from outside to inside, the storage space includes a first part 31, a second part 32, a third part 33 and a fourth part 34; wherein the diameter of the first part 31 is greater than the diameter of the base 11; along the first direction, the size of the first part 31 is equal to the size of the base 11; the diameter of the second part 32 is smaller than the diameter of the first part 31 and greater than the diameter of the sleeve 7; along the first direction, the size of the second part 32 is equal to the size of the sleeve 7, and the step between the first part 31 and the second part 32 can be clamped to the base 11; the The diameter of the third part 33 is smaller than the diameter of the second part 32 and larger than the diameter of the main body 21, and the step between the second part 32 and the third part 33 can clamp the sleeve 7; along the first direction, the size of the third part 33 is greater than or equal to 0; the diameter of the fourth part 34 is smaller than the diameter of the third part 33 and larger than the diameter of the piercing part 22; along the first direction, the size of the fourth part 34 is larger than the size of the piercing part 22 and smaller than the compressed size of the elastic mechanism 1, ensuring that the piercing part 22 can penetrate into the battery cell 6 under the action of the elastic force, avoiding the release of the elastic force, and the piercing part 22 moves in the direction close to the battery cell 6, but does not contact the battery cell 6.

[0061] In specific implementation, the puncture portion 22 is a conical structure, and the tip of the conical structure is set away from the main body 21, so that when the restraining force of the restraining structure is lost, the puncture portion 22 can pierce the diaphragm inside the battery cell 6. It should be noted that the puncture portion 22 is a high-temperature resistant rigid conductive material to ensure that the puncture portion 22 can still work at a preset temperature. At the same time, its conductivity can better serve the electrical connection between the positive electrode and the negative electrode on both sides of the diaphragm, thereby preventing the occurrence of a short circuit inside the battery. In addition, the diameter of the end of the conical structure away from the tip is 3.6 mm, but it is not limited to this. The diameter of the end of the conical structure away from the tip can be specifically designed by those skilled in the art according to actual needs.

[0062] In a specific implementation, the housing includes an outer shell 5 and a top cover 4, the outer shell 5 and the top cover 4 enclose a receiving cavity, and the first end is connected to the outer shell 5 or the top cover 4. That is, the trigger device can be placed in various parts of the battery, which can be the top cover 4 provided with the pole, or other outer shells 5 except the top cover 4. The specific setting position and number of the trigger device can be specifically designed by those skilled in the art according to actual needs. It should be noted that when the trigger device is set on the top cover 4, the first structural layer is the lower plastic; when the trigger device is set on other parts of the outer shell 5, the first structural layer is the plastic layer.

[0063] During specific implementation, the puncture structure is fixed between the shell and the first structural layer, the upper surface of the puncture needle is received in the fourth part 34 or the third part 33 of the first structural layer, the free end of the puncture part 22 does not exceed the lower surface of the first structural layer, the puncture part 22 compresses the elastic part 12, and there is a compression force inside the elastic part 12; when the temperature of the battery cell 6 rises to exceed the melting point of the first structural layer, the first structural layer melts, the step between the third part 33 and the fourth part 34 eliminates the constraint on the puncture part 22, the elastic force of the elastic part 12 is released, and the puncture part 22 is pushed out, and when the free end of the puncture part 22 pierces the battery cell 6, a short circuit occurs inside the winding core.

[0064] The embodiment of the present invention provides an electric device, including the above-mentioned battery. The embodiment of the present application provides an electric device using a battery as a power source, and the electric device can be but is not limited to a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0065] It can be seen that in the electrical device provided by the present invention, when an external short circuit or other abnormal conditions occur, the internal temperature of the battery rises, the constraint mechanism 3 melts, the constraints of the elastic mechanism 1 and the puncturing mechanism 2 disappear, and the puncturing mechanism 2 is inserted into the battery cell 6 through the elastic mechanism 1 to puncture the diaphragm in the battery cell 6, so that the positive electrode plate in the battery is connected to the negative electrode plate, resulting in an internal short circuit in the battery, so that the battery only smokes, avoiding fire and explosion, and causing greater losses. When the battery is short-circuited externally, the resistance is small, resulting in a large current, heat generated at the pole, current rises, heat generation increases sharply, and the pole temperature rises rapidly, causing the plastic layer in the battery to melt, the electrolyte vaporizes and comes into contact with oxygen in the air, the electrolyte is oxidized to generate a large amount of heat, and the battery may catch fire or even explode. In this case, the internal short circuit of the battery will cause part of the current to be shared by the internal short circuit path, and the internal short circuit path is shorter, the electron path increases, the current passing through the pole position is reduced, heat generation is reduced, and the risk of leakage at the pole is reduced. The inside of the battery is not in contact with the air, and no oxidation reaction occurs to generate heat. The battery will not heat up too quickly in a short period of time, and will not catch fire or explode.

[0066] The components and devices involved in the present invention 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 drawings. As will be appreciated by those skilled in the art, these components and devices can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, meaning "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 word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0067] It should also be noted that in the device of the present invention, each component can be decomposed and / or reassembled, and these decompositions and / or reassemblies should be regarded as equivalent solutions of the present invention.

[0068] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0069] 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 invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: A housing, wherein the housing is provided with a receiving cavity; A battery cell (6) is located in the accommodation cavity; A trigger device, the trigger device comprising an elastic mechanism (1), a puncturing mechanism (2) and a restraining mechanism (3); Wherein, the elastic mechanism (1) comprises a first end and a second end along a first direction, and the first end is connected to the housing; One end of the puncturing mechanism (2) is connected to the second end of the elastic mechanism (1), and the other end of the puncturing mechanism (2) is a free end; The restraining mechanism (3) is capable of fixing the elastic mechanism (1) and the puncturing mechanism (2) in a first position. In the first position, the free end of the puncturing mechanism (2) is spaced apart from the battery cell (6), and the elastic mechanism (1) is in a compressed state. When the restraining mechanism (3) fails at a preset temperature, the elastic mechanism (1) releases its elastic force, driving the puncturing mechanism (2) to move in the direction of the battery cell (6), and the puncturing mechanism (2) is capable of extending into the interior of the battery cell (6) to puncture the diaphragm in the battery cell (6).

2. The battery according to claim 1, characterized in that The end surface of the first end is provided with a first limiting portion; The inner surface of the shell is provided with a second limiting portion; One of the first limiting portion and the second limiting portion is a protrusion, and the other is a groove, and the protrusion and the groove are adapted to each other.

3. The battery according to claim 1, characterized in that The puncturing mechanism (2) comprises a main body (21) and a puncturing portion (22), and two ends of the main body (21) along the first direction are respectively connected to the elastic mechanism (1) and the puncturing portion (22); Along the first direction, the projection of the main body portion (21) is larger than the projection of the puncturing portion (22).

4. The battery according to claim 3, characterized in that It also comprises a sleeve (7), the sleeve (7) being a guide member for the piercing portion (22) to move along the first direction, and the sleeve (7) accommodating the elastic mechanism (1) and the piercing mechanism (2) inside; One end of the sleeve (7) along the first direction is connected to the housing, and the end surface of the other end is provided with a first through hole; Along the first direction, the projection of the first through hole at least covers the projection of the puncture portion (22).

5. The battery according to claim 4, characterized in that The main body (21) comprises a base and an elongated portion, and along the first direction, two ends of the elongated portion are respectively connected to the base and the piercing portion (22); Along the first direction, the projection of the base covers the projection of the elongated portion, and the projection of the base covers the projection of the first through hole.

6. The battery according to claim 4, characterized in that The elastic mechanism (1) comprises a base (11) and an elastic member (12); the elastic member (12) is connected to the base (11); and an end of the base (11) facing away from the elastic member (12) is the first end.

7. The battery according to claim 6, characterized in that The restraining mechanism (3) comprises a receiving space opened on the first structural layer for receiving the puncturing mechanism (2), the elastic mechanism (1) and the sleeve (7); From outside to inside along the first direction, the accommodating space includes a first part (31), a second part (32), a third part (33) and a fourth part (34); The diameter of the first portion (31) is greater than the diameter of the base (11); along the first direction, the size of the first portion (31) is equal to the size of the base (11); The diameter of the second portion (32) is smaller than the diameter of the first portion (31) and larger than the diameter of the sleeve (7); along the first direction, the size of the second portion (32) is equal to the size of the sleeve (7); The diameter of the third portion (33) is smaller than the diameter of the second portion (32) and larger than the diameter of the main body portion (21); along the first direction, the size of the third portion (33) is greater than or equal to 0; The diameter of the fourth portion (34) is smaller than the diameter of the third portion (33) and larger than the diameter of the puncturing portion (22); along the first direction, the size of the fourth portion (34) is larger than the size of the puncturing portion (22) and smaller than the compressed size of the elastic mechanism (1).

8. The battery according to claim 3, characterized in that The puncturing portion (22) is a conical structure, and the tip of the conical structure is arranged away from the main body (21).

9. The battery according to any one of claims 1 to 8, characterized in that The shell comprises an outer shell (5) and a top cover (4), wherein the outer shell (5) and the top cover (4) enclose the accommodating cavity, and the first end is connected to the outer shell (5) or the top cover (4).

10. An electrical device, characterized in that: A battery comprising any one of claims 1 to 9.

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