Battery and electric equipment

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery and electric equipment, the battery comprises a first plate, a second plate and a supporting structure; the first plate is used for supporting the battery monomers; the second plate is arranged on one side, far away from the battery monomers, of the first plate and is spaced from the first plate; the supporting structure is arranged between the first plate and the second plate and is adjacent to the first plate and the second plate, and the supporting structure, the first plate and / or the second plate jointly form an exhaust space; the single battery is provided with a pressure relief mechanism, the first plate is provided with an exhaust structure, the pressure relief mechanism and the exhaust structure are correspondingly arranged, and the surface of the pressure relief mechanism and the exhaust space can be communicated after the exhaust structure is broken. The utility model aims to reduce the complexity of a box body structure, reduce the waste of space in a bag and reduce the risk that other battery cells are possibly affected when a certain battery cell is out of control.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery and an electrical device. Background Art

[0002] As the requirements for battery use continue to increase, the energy density and power density of batteries are getting higher and higher. In particular, power batteries used in the field of electric vehicles have a large energy density and power density, so the risks increase accordingly. For example, when the battery fails, such as overcharge, external short circuit or internal short circuit, it is easy to cause the electrolyte inside the battery cell to decompose, and the decomposition of the electrolyte will produce a large amount of gas.

[0003] Typically, when a battery cell experiences thermal runaway, pressure relief and exhaust are performed through a pressure relief mechanism. The battery case in the related art has an exhaust structure through which gases and the like are discharged. However, the existing exhaust structure is complex, resulting in a complex case structure, waste of space in the package, and high manufacturing costs. In addition, there is a high risk of affecting other battery cells when a battery cell loses control. Utility Model Content

[0004] In view of the above problems, the present application provides a battery and electrical equipment, aiming to reduce the complexity of the box structure, reduce the waste of space in the package, and reduce the risk of affecting other battery cells when a certain battery cell is out of control.

[0005] To solve the above problems, in a first aspect, the present application provides a battery, comprising:

[0006] A first plate, used for supporting a battery cell;

[0007] A second plate member is disposed on a side of the first plate member away from the battery cell and is spaced apart from the first plate member;

[0008] a supporting structure, disposed between the first plate and the second plate and adjacent to the first plate and the second plate, wherein the supporting structure, the first plate and / or the second plate together constitute an exhaust space; and

[0009] The battery cell has a pressure relief mechanism, the first plate is provided with an exhaust structure, the pressure relief mechanism is arranged corresponding to the exhaust structure, and the exhaust structure can connect the surface of the pressure relief mechanism and the exhaust space after being broken. The exhaust space has a simple structure, and the exhaust space is formed by the first plate and the support structure to achieve flow guidance and exhaust. The inverted battery cell improves space utilization, and can also reduce the risk of affecting other battery cells when a battery cell has thermal runaway.

[0010] In one embodiment of the first aspect, the first plate is made of a non-metallic high-temperature resistant material, and / or the supporting structure is made of a non-metallic material, and / or the second plate is at least partially made of a high-temperature resistant material. The first plate, the supporting structure, and the second plate are made of low thermal conductivity or high-temperature resistant materials, which reduces heat conduction and high-temperature resistance, thereby improving safety in use. Since the fireproof layer is provided, the tolerance strength of the overall structure is further enhanced, and gas leakage from the exhaust space to an unexpected location is avoided. In addition, since the fireproof layer 17 is provided or the high-temperature resistant material is used, the overall thickness of the second plate does not need to be too thick, and the overall structure will not be too bulky, thereby avoiding inconvenience in operation.

[0011] In an embodiment of the first aspect, the first plate is made of mica, which has very good heat resistance, acid and alkali resistance and excellent insulation.

[0012] In an embodiment of the first aspect, the support structure is made of plastic material. The plastic material is light in texture, which reduces the overall weight of the battery and increases the energy density. The plastic material is a non-thermal conductive material, which reduces heat conduction and avoids the spread of thermal runaway.

[0013] In an embodiment of the first aspect, the exhaust structure includes an exhaust hole and a protective film disposed on a side of the first plate close to or away from the battery cell, and the protective film covers the exhaust hole. When thermal runaway exhaust occurs in one of the battery cells, other battery cells will not be affected.

[0014] In an embodiment of the first aspect, the first plate and the protective film are both made of non-metallic high temperature resistant material, the thickness of the protective film is less than the thickness of the first plate, or a weak structure is provided on the protective film at a position corresponding to the exhaust hole. The protective film can rupture when thermal runaway occurs in the battery cell to ensure smooth exhaust.

[0015] In an embodiment of the first aspect, the exhaust structure is a thinned structure. The thinned structure does not require a separate protective film and can be directly formed on the first plate, so that the structure is simple and the processing and manufacturing cost is low.

[0016] In an embodiment of the first aspect, there are a plurality of battery cells, and the plurality of battery cells are arranged along a first direction, the first direction is perpendicular to the thickness direction of the first plate, an explosion-proof valve is provided at the end of the battery along the first direction, and an exhaust port is provided at the end of the exhaust space along the first direction close to the explosion-proof valve. The plurality of battery cells are provided to increase the energy of the battery, the battery cells are arranged regularly, and the gas passes through the exhaust space and then is discharged from the battery through the explosion-proof valve, further improving safety.

[0017] In an embodiment of the first aspect, the support structure includes a support plate, and a side of the support plate facing the first plate is recessed in a direction away from the first plate to form a groove. Since the support plate has the groove, the support plate that is impacted is away from the exhaust structure, which can appropriately reduce the impact and increase the exhaust space.

[0018] In an embodiment of the first aspect, the support structure includes a plurality of support plates, the support plates extend along the first direction to correspond to the pressure relief mechanisms of the plurality of battery cells arranged along the first direction, and the plurality of support plates are arranged along a second direction, and the second direction is perpendicular to the first direction and the thickness direction of the first plate. The reasonable arrangement and layout of the exhaust space provides a reasonable exhaust and pressure relief structure for the battery with multiple battery cells, which is simple, reasonable, effective and safe.

[0019] In an embodiment of the first aspect, the support structure includes a plurality of support plates, each support plate corresponds to a pressure relief mechanism of the battery cell, and the plurality of support plates are arranged along a first direction and a second direction, and the second direction is perpendicular to the first direction and the thickness direction of the first plate. The independence between the battery cells is relatively good, which greatly reduces the risk of mutual interference.

[0020] In an embodiment of the first aspect, a middle beam is provided between at least two adjacent support plates among the plurality of support plates, and the middle beam is connected to the second plate member.

[0021] In a second aspect, the present application further provides an electric device, which is equipped with the battery provided in any one of the above embodiments, thereby increasing the reliability of the electric device.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0025] Figure 2 A schematic diagram of an exploded structure of a battery according to some embodiments of the present application;

[0026] Figure 3 A schematic diagram of a top view of a battery according to some embodiments of the present application;

[0027] Figure 4 for Figure 3 Section view along AA direction;

[0028] Figure 5 for Figure 2 A schematic structural diagram of the first plate;

[0029] Figure 6 A schematic cross-sectional view of a battery according to some embodiments of the present application;

[0030] Figure 7 for Figure 6 Schematic diagram of the local structure.

[0031] The reference numerals in the specific implementation manner are as follows:

[0032] 1000. Vehicles;

[0033] 100, battery; 200, controller; 300, motor;

[0034] 10. Battery cell; 20. Colloid; 30. Heat exchange component;

[0035] 1. Box body; 11. First plate; 12. Second plate; 121. Plate body; 122. Fireproof layer; 13. Support structure; 14. Exhaust structure; 141. Exhaust hole; 142. Protective film; 15. Exhaust space; 16. Explosion-proof valve; 17. Middle beam; 18. Exhaust port. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments 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.

[0040] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0042] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0045] The battery may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. The battery may be cylindrical, flat, rectangular or other shapes, etc., which is not limited in the embodiments of the present application. Batteries are generally divided into three types according to the packaging method: cylindrical batteries, square batteries and soft-pack batteries.

[0046] The battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series, in parallel, or in a hybrid connection, wherein the hybrid connection refers to a mixture of series and parallel connection. Optionally, a plurality of battery cells may be connected in series, in parallel, or in a hybrid connection to form a battery membrane block, and a plurality of battery membrane blocks may be connected in series, in parallel, or in a hybrid connection to form a battery. In other words, a plurality of battery cells may be directly formed into a battery, or may be first formed into a battery membrane block, and the battery membrane block may then be formed into a battery. The battery is further arranged in an electrical device to provide electrical energy to the electrical device.

[0047] In the battery structure, the battery cells can be contained in the battery box, that is, the battery box is used to provide a storage space for the battery cells. The battery box may include a box body and a cover, and the box body and the cover cover each other to seal the battery cells contained therein.

[0048] The electrode assembly is the part of the battery cell where the electrochemical reaction occurs. The housing may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. Both the positive electrode sheet and the negative electrode sheet include a current collector and an active material layer provided on the current collector. The active material layer on the positive electrode sheet and the active material layer on the negative electrode sheet react with the electrolyte to achieve charging and discharging.

[0049] For electric devices such as electric vehicles and electric aircraft that have power batteries and motors, power batteries are used as power sources. During use, thermal runaway may occur, that is, extremely destructive battery runaway caused by excessive battery temperature. When the heat generation rate of the battery is much higher than the heat dissipation rate, the heat generated by the battery cannot be dissipated in time. When a large amount of heat accumulates, the battery will heat up rapidly. When the battery temperature rises to a certain level, it will cause a series of chemical reactions in the chemicals inside the battery, causing the overall battery system to heat up, power to decrease, and a large amount of high-temperature and high-pressure gas to be generated, and even explosions.

[0050] When battery cells experience thermal runaway, they are prone to fire and explosion, posing a major safety hazard. How to improve the safety performance of batteries is an urgent problem that needs to be solved in the development of battery technology.

[0051] In order to effectively improve the safety performance of battery cells, a pressure relief mechanism can be provided on the battery cells. When the battery cells experience thermal runaway and the pressure or temperature inside the battery cells suddenly rises, the pressure relief mechanism is activated to form a pressure relief hole. The pressure relief hole connects the inside and outside of the battery cells, and the internal pressure of the battery cells can be released outward in time to prevent the battery cells from exploding or catching fire, thereby effectively improving the safety performance of the battery cells.

[0052] In the related art, the bottom plate of the battery box is provided with a sandwich structure, and the pressure relief mechanism of the battery cell faces upward, and an additional exhaust space needs to be provided, resulting in a waste of space in the package.

[0053] In other cases of the related art, an exhaust channel is set at the bottom of the battery box, and a pressure relief mechanism is set on the end face of each battery cell facing the exhaust channel. When any battery cell thermally runs away, the gas in the battery cell can be collected into the exhaust channel through the weak area and discharged. However, the exhaust structure in the related art is complicated, which makes the box structure complicated, the manufacturing cost is high, and there is a high risk of affecting other cells when a certain battery cell runs away.

[0054] Based on the above considerations, an embodiment of the present application provides a battery with a relatively simple exhaust structure, which fully utilizes the space inside the package and reduces the risk of affecting other battery cells when a certain battery cell loses control.

[0055] The battery 100 provided in this embodiment can be used as a power source in an electric device or in various energy storage systems using the battery 100 as an energy storage element. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0056] The battery 100 disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles 1000, ships or aircraft. A power supply system having the box and the battery 100 disclosed in the present application can be used, which is beneficial to improving the reliability of the battery.

[0057] For the convenience of description, the following embodiments are described by taking the electric device provided in the embodiments of the present application as a vehicle 1000 as an example.

[0058] Please refer to Figure 1, Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0059] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0060] In some embodiments of the present application, the battery 100 may include a box, a battery cell 10 and a heat exchange system, wherein the battery cell 10 is accommodated in the box. The box is used to provide an accommodation space for the battery cell 10, and the box may adopt a variety of structures.

[0061] The battery cell 10 may be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged, and a primary battery refers to a battery cell that cannot be continuously used by activating the active material by charging after the power of the battery cell is exhausted. The battery cell 10 may also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., but is not limited thereto. The battery cell 10 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal prismatic battery. The polygonal prismatic battery is, for example, a hexagonal prismatic battery, etc., and the present application has no particular restrictions.

[0062] According to some embodiments of the present application, please refer to 2. Figure 3 , Figure 4 , Figure 5, discloses a battery 100, including a first plate 11, a second plate 12, and a support structure 13. The battery 100 also includes a plurality of battery cells 10, and the first plate 11 is used to support the battery cells 10, that is, the battery cells 10 can be placed side by side on the first plate 11. The second plate 12 is spaced apart from the first plate 11, and there is a certain gap between the two. Specifically, the second plate 12 is arranged on the side of the first plate 11 away from the battery cells 10, thereby forming a gap.

[0063] The support structure 13 is disposed between the first plate 11 and the second plate 12 and is adjacent to the first plate 11 and the second plate 12 . The support structure 13 , the first plate 11 and / or the second plate 12 together constitute an exhaust space 15 , so the gap between the first plate 11 and the second plate 12 forms an exhaust space 15 .

[0064] In addition, the battery cell 10 has a pressure relief mechanism, and the first plate 11 is provided with an exhaust structure 14 . The pressure relief mechanism and the exhaust structure 14 are arranged correspondingly. When the exhaust structure 14 is broken, the surface of the pressure relief mechanism and the exhaust space 15 can be connected.

[0065] Specifically, the first plate 11 supports the battery cell 10, so the first plate 11 is arranged at the lower part of the battery cell 10, and the pressure relief mechanism is arranged corresponding to the exhaust structure 14, so the pressure relief mechanism is also arranged at the lower part of the battery cell 10 and corresponds to the exhaust structure 14, so it is equivalent to the battery cell 10 being inverted, and the pressure relief mechanism is facing the exhaust space 15, so that the material sprayed out when the battery cell is depressurized by the pressure relief mechanism can enter the exhaust space 15 through the exhaust structure 14, thus making full use of the space inside the battery 100, improving the space utilization rate, and reducing the waste of space inside the package.

[0066] like Figure 2 and Figure 4 As shown, the exhaust space 15 is composed of a support structure 13, a first plate 11 and a second plate 12. The support structure 13 can be used to connect the first plate 11 and the second plate 12 to form the exhaust space 15. The first plate 11 can be a flat plate, the second plate 12 can be a flat plate, the second plate 12 and the first plate 11 are arranged opposite to each other and can be parallel to each other, the support structure 13 is arranged between the two, the upper side of the support structure 13 can be connected to the first plate 11, and the lower side can be connected to the second plate 12 to complete the closure.

[0067] Or, in other embodiments, Figure 6 and Figure 7 As shown, the exhaust space 15 is formed by the support structure 13 and the first plate 11, which enclose the exhaust space 15, while the second plate 12 holds the support structure 13 from the bottom.

[0068] This embodiment can form a relatively closed exhaust space 15, and the exhaust space 15 can also be selectively provided with a position for gas outflow, so that the gas flows out in a specified direction.

[0069] See also Figure 2-Figure 5 The battery 100 may further include a box body 1, a first plate 11 is disposed in the box body 1, and the edge of the first plate 11 may be connected to the inner wall of the box body 1, the battery cell 10 may be located in the box body 1, the box body 1 may be a shell-shaped hollow structure, and the box body 1 is used to accommodate the battery cell 10 to form the battery 100. The shape of the box body 1 may be a rectangular parallelepiped or a cube. The battery cells 10 may be evenly arranged in the form of multiple rows and columns inside the box body 1. However, when the battery cells 10 are installed in the box body 1, a certain amount of support is required, so the first plate 11 provided in this embodiment is used to support the battery cells 10. The first plate 11 may be a flat plate structure, which can install or support multiple battery cells 10, and the multiple battery cells 10 are located on the same side of the first plate 11. However, the battery cell 10 is provided with a pressure relief mechanism, which may be an explosion-proof valve. The pressure relief mechanism will perform exhaust operation under extreme conditions to relieve pressure, so an exhaust structure 14 is provided on the first plate 11 in this embodiment. The exhaust structure 14 is provided on the first plate 11 to allow gas to flow. When specifically set, the battery cell 10 is inverted, and then one side of the pressure relief mechanism is aligned with the exhaust structure 14. When the pressure relief mechanism exhausts gas, it can break through the exhaust structure 14 to allow gas to enter the exhaust space 15.

[0070] The second plate 12 cooperates with the supporting structure 13 to form the bottom structure of the box body 1 .

[0071] The exhaust space 15 is used to guide the gas when it flows in, so that it flows in a specified direction, and can be provided with an exhaust port 18, through which the gas is discharged. Such a structural setting is very simple, avoiding the technical problem of complex exhaust in the related art. Among them, the exhaust port 18 can be set at a suitable position of the support structure 13.

[0072] Since multiple battery cells 10 can be provided, each battery cell 10 is provided with a corresponding exhaust structure 14. After the multiple exhaust structures 14 are ruptured, they are connected to the exhaust space 15. Therefore, when a battery cell 10 is in thermal runaway, the gas released will enter the exhaust space 15. In order to avoid affecting other battery cells 10, the exhaust structure 14 provided in this embodiment is connected to the exhaust space 15 only after rupture. The rupture occurs when a battery cell 10 is in thermal runaway and impacts the exhaust structure 14. The gas in the exhaust space 15 will not affect other battery cells 10 through other unruptured exhaust structures 14. It should be noted that the strength of the exhaust structure 14 is certain. When the battery cell 10 is in thermal runaway, the gas generated can break through the exhaust structure 14, but the gas that has flowed into the exhaust space 15 will not break through other exhaust structures 14 due to the weakening of the impact force or the lowering of the temperature.

[0073] Therefore, the effect of the box body 1 provided in this embodiment is that, firstly, the exhaust space 15 has a simple structure. The exhaust space 15 is formed by the first plate 11 and the support structure 13 to achieve diversion and exhaust. The battery cell 10 is inverted to improve space utilization. Moreover, when a battery cell 10 has thermal runaway, the risk of affecting other battery cells 10 can be reduced.

[0074] In some embodiments, the first plate 11 is made of a non-metallic high-temperature resistant material, and / or the supporting structure 13 is made of a non-metallic material, and / or the second plate 12 is at least partially made of a high-temperature resistant material.

[0075] Specifically, the first plate 11 is a non-metallic high-temperature resistant material, so that its thermal conductivity is relatively low, which can achieve the effect of thermal isolation, reduce the heat transfer of the runaway battery cell 10, and improve safety. In addition, the first plate 11 is also made of a high-temperature resistant material, which can withstand the high temperature of the thermal runaway battery cell 10 without damage, thereby improving safety. The support structure 13 is made of a non-metallic material, which also makes the support structure 13 have a lower thermal conductivity system, reducing the transfer of heat.

[0076] At least a portion of the second plate 12 is made of high temperature resistant material.

[0077] Specifically, Figure 4 , the second plate 12 can directly bear the gas impact.

[0078] Or, if Figure 7 The second plate 12 is arranged in close contact with the supporting structure 13 to enhance the impact resistance of the supporting structure 13 .

[0079] The part of the second plate 12 used to withstand the impact of gas is made of high temperature resistant material. In this way, when the battery cell 10 has thermal runaway, the gas breaks through the exhaust structure 14 and enters the exhaust space 15. Therefore, the part of the second plate used to withstand the impact is made of high temperature resistant material. This not only reduces the overall thickness of the second plate, but also prevents it from being penetrated by gas, ensures the safety of use, and makes the structure simple and reduces the cost.

[0080] The second plate 12 may be entirely made of a high temperature resistant material or partially made of a high temperature resistant material.

[0081] like Figure 2 The second plate 12 may be arranged in such a manner that the second plate 12 may include a plate body 121 and a fireproof layer 122. The fireproof layer 122 may be arranged on the side of the plate body 121 facing the first plate 11. The fireproof layer 122 may be made of a high temperature resistant material and is used to withstand impact.

[0082] The function of the second plate 12 is to prevent the high-temperature and high-pressure gas from being broken during impact. The fireproof layer 122 has strong impact resistance and high-temperature resistance, and can withstand strong impact without causing gas leakage.

[0083] The effect of this embodiment is that the first plate 11, the support structure 13, and the second plate 12 are made of low thermal conductivity or high temperature resistant materials, which reduces heat conduction and high temperature resistance, thereby improving the safety of use. Due to the fireproof layer 122, the tolerance strength of the overall structure is further enhanced, and the gas is prevented from leaking from the exhaust space 15 to an unexpected position. In addition, due to the provision of the fireproof layer 122 or the use of high temperature resistant materials, the overall thickness of the second plate 12 does not need to be too thick, which will not make the overall structure too bulky and avoid inconvenience in operation.

[0084] In some embodiments, the first plate 11 is made of mica. Mica is an aluminum silicate of potassium aluminum or potassium magnesium iron. It can be divided into muscovite, biotite, and phlogopite. Mica has very good heat resistance, acid and alkali resistance, and excellent insulation.

[0085] In some embodiments, the support structure 13 is made of plastic material. The support structure 13 forms an exhaust space 15 for accommodating gas. The plastic material is light in texture, which reduces the overall weight of the battery 100 and increases the energy density. The plastic material is a non-thermal conductive material, which reduces heat conduction and prevents the spread of thermal runaway.

[0086] In some embodiments, Figure 5 The exhaust structure 14 includes an exhaust hole 141 and a protective film 142 disposed on a side of the first plate 11 close to or away from the battery cell 10 , and the protective film 142 covers the exhaust hole 141 .

[0087] Specifically, the exhaust hole 141 is connected to the exhaust space 15 and is aligned with the pressure relief mechanism of the battery cell 10. The exhaust structure 14 also includes a protective film 142, which is arranged on the first plate 11 and covers the exhaust hole 141. The protective film 142 is configured to rupture under high temperature and / or high pressure. A protective film 142 is provided at the exhaust hole 141. The protective film 142 is connected to the first plate 11 and can be provided in the form of a sticker, which at least covers the exhaust hole 141. In this way, the gas in the exhaust space 15 will not affect other battery cells 10 through other exhaust holes 141. The protective film 142 provided in this embodiment is configured to be able to rupture under high temperature and / or high pressure, specifically referring to the impact force and temperature of the thermal runaway gas of the corresponding battery cell 10, and the selection standard of the strength of the protective film 142 is that the protective film 142 can be ruptured when the corresponding battery cell 10 is in thermal runaway.

[0088] Therefore, due to the protective film 142 , when one of the battery cells 10 experiences thermal runaway exhaust, other battery cells 10 will not be affected.

[0089] In some embodiments, the first plate 11 and the protective film 142 are both made of non-metallic high-temperature resistant materials, the thickness of the protective film 142 is less than that of the first plate 11 , or a weak structure is provided on the protective film 142 at a position corresponding to the exhaust hole 141 .

[0090] Specifically, the first plate 11 and the protective film 142 are both made of non-metallic high-temperature resistant materials.

[0091] The protective film 142 can break under a certain impact, and the protective strength is also certain. It cannot be too strong to avoid being broken by high-temperature and high-pressure gas during thermal runaway, nor can it be too small. If it is too small, the gas in the exhaust space 15 may break through the protective film 142 and interfere with the battery cell 10 that has not experienced thermal runaway.

[0092] Therefore, in this embodiment, the thickness of the protective film 142 is set to be smaller than the thickness of the first plate 11, which appropriately reduces the strength of the protective film 142 and can break when impacted. Alternatively, a weak structure is set on the protective film 142 at the position corresponding to the exhaust hole 141, which can also break when impacted.

[0093] The weak structure can be a notch. The notch design is conducive to breaking through the protective film 142, which is equivalent to setting a weak area on the protective film 142. When impacted, it can break along the extension direction of the notch to form a gap. If no notch is set, it may not be easy to break through, or the entire protective film 142 may be sprayed off, which is not desired.

[0094] The notches can be selected as linear notches, cross notches or circular notches with a certain length, and can be set as needed. The cross section of the notches can be selected as triangular grooves, semicircular grooves or arc grooves, etc., which is equivalent to reducing the thickness of the protective film 142 at the notches.

[0095] Furthermore, since different types of batteries 100 generate different temperatures and pressures when thermal runaway occurs, the protective film 142 can be classified, specifically into a first film and a second film. The protection strengths of the two are different, specifically, the critical rupture temperature and / or pressure of the first film is greater than the critical rupture temperature and / or pressure of the second film.

[0096] The critical rupture temperature is the lowest temperature at which the membrane can rupture, and the critical rupture pressure is the lowest pressure at which the membrane can rupture.

[0097] Specifically, it can be understood that the lowest temperature at which the first film can be ruptured is greater than the lowest temperature at which the second film can be ruptured, and / or the lowest pressure at which the first film can be ruptured is greater than the lowest pressure at which the second film can be ruptured.

[0098] Specifically, for lithium iron battery cells 10, the thermal runaway temperature is relatively low, and a fusible plastic film can be simply used for protection. When thermal runaway occurs, the plastic film is melted through, and the gas is smoothly discharged into the diversion chamber, while blocking some particles from running to the bottom of the adjacent battery cell 10. For ternary battery cells, due to their higher energy density, high-temperature gas and particles will be generated during thermal runaway. At this time, the protective film can be made of a fireproof film material with notches. The battery cell with thermal runaway will instantly produce a large amount of gas that breaks through the film material, but the high-temperature eruption will be intercepted by other protective films 142 after entering the diversion chamber, thereby improving the thermal safety of the surrounding battery cells and reducing the risk of diffusion. According to the different types of battery cells 10, the strength level of the protective film 142 is selected accordingly, which can not only achieve the corresponding effect, but also save the setting cost.

[0099] Alternatively, the protective film 142 may also be selected from multiple film bodies, each of which has a different protective strength, and may be specifically configured according to the needs of the battery cell 10 .

[0100] Therefore, the effect of this embodiment is that the protective film 142 can be ruptured when the battery cell 10 undergoes thermal runaway, thereby ensuring smooth exhaust.

[0101] In some embodiments, the exhaust structure 14 may also be a thinned structure, that is, the thinned structure of the first plate 11 itself, for example, the first plate 11 has a certain thickness H, and the exhaust structure 14 is a region on the first plate 11 with a thickness lower than H, and this region is a thinned structure. When the battery cell 10 has thermal runaway, the thinned structure ruptures, so that the gas can be discharged into the exhaust space 15.

[0102] The thinning structure of this embodiment does not need to be provided with a separate protective film 142, and can be directly formed on the first plate 11, so that the structure is simple and the processing and manufacturing cost is low.

[0103] In some embodiments, the battery 100 includes multiple battery cells 10, and the multiple battery cells 10 are arranged along a first direction, the first direction is perpendicular to the thickness direction of the first plate 11, and an explosion-proof valve 16 is provided at the end of the battery 100 along the first direction, and an exhaust port 18 is provided at the end of the exhaust space 15 along the first direction near the explosion-proof valve 16.

[0104] like Figure 4 As shown, the first direction is Figure 4 In the direction of the arrow X, the thickness direction of the first plate 11 is Figure 4 The direction of the arrow Y.

[0105] Or, if Figure 7 As shown, the thickness direction of the first plate 11 is Figure 7 The direction of the arrow Y in the first direction is Figure 7 The direction is perpendicular to both arrow Z and arrow Y (not shown in the figure).

[0106] Specifically, the battery cell 10 is a plurality of cells that can improve the energy of the battery 100. The plurality of battery cells 10 are arranged along a first direction on the first plate, and the first direction is perpendicular to the thickness direction of the first plate 11. The explosion-proof valve 16 is arranged at the end position of the first direction. The explosion-proof valve 16 can be arranged on the box body 1. After the gas in the exhaust space 15 is discharged from the exhaust port 18, it can be discharged from the battery 100 after passing through the explosion-proof valve 16. That is, the gas discharged from the exhaust port 18 will pass through the explosion-proof valve 16 before flowing out of the battery 100. The explosion-proof valve 16 and the pressure relief mechanism of the battery cell 10 are two structures. Of course, the pressure relief mechanism can also use an explosion-proof valve.

[0107] The effect of this embodiment is that a plurality of battery cells 10 are provided, the energy of the battery 100 is improved, the battery cells 10 are arranged regularly, and the gas passes through the exhaust space 15 and then is discharged from the battery 100 through the explosion-proof valve 16, which further improves safety.

[0108] In some embodiments, Figure 7 As shown, the support structure 13 includes a support plate, and a side of the support plate facing the first plate member 11 is recessed in a direction away from the first plate member 11 to form a groove.

[0109] The present embodiment provides a support structure 13 including a support plate, the support plate forms a cavity and cooperates with the first plate 11 to form an exhaust space 15, and the side of the support plate facing the first plate 11 is recessed in a direction away from the first plate 11 to form a groove. Since the exhaust structure 14 is provided on the first plate 11, the gas will enter the exhaust space 15 through the exhaust structure 14, and since the support plate has a groove, the support plate that is impacted is away from the exhaust structure 14, which can appropriately reduce the impact and increase the exhaust space 15.

[0110] In some embodiments, see Figure 6 and Figure 7 The support structure 13 includes a plurality of support plates extending along a first direction to correspond to the pressure relief mechanisms of the plurality of battery cells 10 arranged along the first direction, and the plurality of support plates are arranged along a second direction, and the second direction is perpendicular to the first direction and the thickness direction of the first plate 11. The second direction is Figure 7 The direction of the arrow Z.

[0111] Specifically, there are multiple support plates, each of which corresponds to multiple battery cells 10. Since the battery cells 10 are arranged along the first direction, multiple battery cells 10 are arranged in the first direction, and the support plate extends along the first direction, which is equivalent to multiple battery cells 10 arranged along the first direction sharing one support plate. Since the battery cells 10 have multiple rows, that is, multiple rows of battery cells 10, and multiple battery cells 10 in each row are arranged along the first direction, correspondingly, multiple support plates are also provided, and multiple support plates are arranged along the second direction, that is, multiple rows of battery cells 10 can be arranged in sequence along the second direction, and each support plate corresponds to a row of battery cells 10. In this way, multiple exhaust spaces 15 are formed, each exhaust space 15 corresponds to multiple battery cells 10 in the same row, and each exhaust space 15 can be corresponding to an explosion-proof valve 16, that is, the gas needs to pass through the explosion-proof valve 16 before it is discharged from the battery 100. Or multiple exhaust spaces 15 are connected and share one explosion-proof valve 16.

[0112] This embodiment provides a reasonable arrangement and layout of the internal support plate of the battery 100, that is, the exhaust space 15, and provides a reasonable exhaust and pressure relief structure for the battery 100 with multiple battery cells 10. The structure is simple, reasonable, effective and safe.

[0113] Alternatively, in some embodiments, the support structure 13 includes multiple support plates, each support plate corresponds to a pressure relief mechanism of a battery cell 10, and the multiple support plates are arranged along a first direction and a second direction, and the second direction is perpendicular to the first direction and the thickness direction of the first plate 11.

[0114] Specifically, the present embodiment provides a plurality of support plates, and each exhaust space 15 formed by the support plate corresponds to a battery cell 10. The effect of this is that the battery cells 10 are relatively independent, which greatly reduces the risk of mutual interference. The exhaust space 15 formed corresponding to each support plate can be connected to the same guide channel on the side, that is, the exhaust port 18 of each exhaust space 15 can be connected to the guide channel, and an explosion-proof valve 16 is provided at the outlet end of the guide channel.

[0115] In some embodiments, Figure 7 As shown, a middle beam 17 is provided between at least two adjacent support plates among the plurality of support plates, and the middle beam 17 is connected to the second plate member 12 .

[0116] Specifically, when multiple support plates are set, in order to ensure the integrity and stability of the structure, a middle beam 17 is set. The middle beam 17 is a columnar support body, one end of which is connected to the second plate 12, and the other end can be connected to the first plate 11, and the middle part of the middle beam 17 is fixedly connected to the support plate, which greatly increases the stability.

[0117] The present application also provides an electrical device equipped with the battery 100 provided in any one of the above embodiments.

[0118] See also Figure 2 and Figure 3 The battery 100 may further include a heat exchange component 30 , which may be disposed on the first plate 1111 , and the first plate 1111 may also be provided with a battery cell 10 , so that the heat exchange component 30 may dissipate heat from the battery cell 10 .

[0119] Specifically, the heat exchange assembly 30 can adopt water cooling for heat exchange. The heat exchange assembly 30 can include multiple heat exchange plates. A flow channel for circulating coolant is set in the heat exchange plate. When the heat exchange plate contacts the outer surface of the battery cell 10, heat exchange can be performed to reduce the temperature so that the battery cell 10 is kept within a reasonable operating temperature range. In order to enhance the stability of the battery cell 10, that is, the stability when connected to the first plate 11, the present application also provides that a colloid 20 is also provided in the box body 1, and the colloid 20 at least wraps the battery cell 10.

[0120] When the battery cells 10 are arranged on the first plate 11 and are located in the box 1, the colloid 20 is poured into the box 1 so that the colloid 20 fills the gaps between the battery cells 10 and the gaps between the battery cells 10 and the inner wall of the box 1. After the colloid 20 solidifies, the multiple battery cells 10 and the box 1 can form a solid whole, thereby enhancing the stability of the battery cell 10 arrangement.

[0121] Furthermore, when the heat exchange component 30 is arranged, the colloid 20 can also be cast together with the heat exchange component 30 , thereby enhancing the stability of the heat exchange component 30 .

[0122] Specifically, the colloid 20 can submerge the heat exchange assembly 30 and the battery cell 10 as a whole or expose part of it, which can be set as needed. The colloid 20 is an insulating glue that can effectively ensure the safety of the overall structure.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A first plate, used for supporting a battery cell; A second plate member is disposed on a side of the first plate member away from the battery cell and is spaced apart from the first plate member; as well as a support structure, disposed between the first plate and the second plate and adjacent to the first plate and the second plate, wherein the support structure, the first plate and / or the second plate together constitute an exhaust space; The battery cell has a pressure relief mechanism, the first plate is provided with an exhaust structure, the pressure relief mechanism is arranged corresponding to the exhaust structure, and the exhaust structure can connect the surface of the pressure relief mechanism and the exhaust space after being ruptured.

2. The battery according to claim 1, characterized in that The first plate is made of a non-metallic high-temperature resistant material, and / or the supporting structure is made of a non-metallic material, and / or the second plate is at least partially made of a high-temperature resistant material.

3. The battery according to claim 2, characterized in that The first plate is made of mica.

4. The battery according to claim 2, characterized in that The supporting structure is made of plastic.

5. The battery according to any one of claims 1 to 4, characterized in that The exhaust structure includes an exhaust hole and a protective film disposed on a side of the first plate close to or away from the battery cell, and the protective film covers the exhaust hole.

6. The battery according to claim 5, characterized in that The first plate and the protective film are both made of non-metallic high-temperature resistant material, the thickness of the protective film is smaller than the thickness of the first plate, or a weak structure is provided on the protective film at a position corresponding to the exhaust hole.

7. The battery according to any one of claims 1 to 4, characterized in that The exhaust structure is a thinned structure.

8. The battery according to claim 5, characterized in that There are multiple battery cells, and the multiple battery cells are arranged along a first direction, the first direction is perpendicular to the thickness direction of the first plate, an explosion-proof valve is provided at the end of the battery along the first direction, and an exhaust port is provided at the end of the exhaust space along the first direction close to the explosion-proof valve.

9. The battery according to any one of claims 1 to 4, characterized in that The support structure comprises a support plate, and a side of the support plate facing the first plate is recessed in a direction away from the first plate to form a groove.

10. The battery according to claim 8, characterized in that The support structure includes a plurality of support plates extending along the first direction to correspond to the pressure relief mechanisms of the plurality of battery cells arranged along the first direction, and the plurality of support plates are arranged along a second direction, and the second direction is perpendicular to the first direction and the thickness direction of the first plate.

11. The battery according to claim 8, characterized in that The support structure includes a plurality of support plates, each support plate corresponds to a pressure relief mechanism of the battery cell, and the plurality of support plates are arranged along a first direction and a second direction, wherein the second direction is perpendicular to the first direction and the thickness direction of the first plate.

12. The battery according to claim 10, characterized in that A middle beam is arranged between at least two adjacent support plates among the plurality of support plates, and the middle beam is connected to the second plate member.

13. An electrical equipment, characterized in that: A battery according to any one of claims 1 to 12 is provided.

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