Battery module, battery and electric device

Abstract

The utility model relates to a battery module, a battery and an electric device. The battery module comprises a battery cell, a cooling plate and a protection piece, the battery cells are arranged at intervals along a first direction; the cooling plate is arranged between the two adjacent battery cells in the first direction, and the two adjacent battery cells and at least one side of the periphery of the cooling plate located between the two battery cells can jointly form an accommodating space; the protective part at least covers at least one side of the cooling plate forming the accommodating space. When thermal runaway of the battery cell occurs, the protective part can prevent gas or particles and the like generated during thermal runaway of the battery cell from entering the accommodating space to act on the cooling plate, so that the probability of damage or even failure of the cooling plate is reduced, and the cooling plate can be effectively protected. Besides, in the assembling process of the battery module, the protective part can also protect the cooling plate and reduce the probability that impurities such as particles enter the accommodating space and damage the cooling plate to cause damage and even failure of the cooling plate.

Description

Technical Field

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

[0002] The cooling plate is used to cool the battery cells in the battery module. In order to cool the battery cells over a large area, a cooling plate is generally used to cool multiple battery cells on one side at the same time. Because the cooling plate is located between two adjacent battery cells, there is a gap between the two adjacent battery cells, which can easily cause particles to enter between the two adjacent battery cells through the gap and damage the cooling plate or the battery cells. Utility Model Content

[0003] In view of the above problems, the present application provides a battery module, a battery and an electrical device, which can prevent particles from entering between two adjacent battery cells, so as to improve the problem of particles damaging the cooling plate or battery cells located between two adjacent battery cells.

[0004] In a first aspect, the present application provides a battery module, the battery module comprising battery cells, a cooling plate and a protective member. The battery cells are arranged at intervals along a first direction; the cooling plate is arranged between two adjacent battery cells along the first direction, and at least one side of the outer periphery of the two adjacent battery cells and the cooling plate located therebetween can jointly form an accommodation space; the protective member at least covers at least one side of the accommodation space formed by the cooling plate.

[0005] In the technical solution of the embodiment of the present application, because the protective member can prevent the cooling plate from directly contacting the outside world through the accommodating space, when the battery cell has thermal runaway, the protective member can block the gas or particles generated by the thermal runaway of the battery cell, so as to reduce the probability of gas or particles entering the accommodating space to act on the cooling plate and cause damage or even failure of the cooling plate, thereby effectively protecting the cooling plate.

[0006] In addition, during the assembly process of the battery module, the protective component can also protect the cooling plate, reduce the probability of impurities such as particles entering the accommodating space and causing damage to the cooling plate, resulting in damage or even failure of the cooling plate.

[0007] In some embodiments, the accommodating space is formed with an opening on a side away from the cooling plate; and the protective member covers the opening.

[0008] Using a protective member to cover the opening can block the path for particles etc. to enter the accommodating space. Moreover, compared with protecting the entire cooling plate, only setting the protective member to cover the opening can reduce the amount of protective member used, thereby reducing the production cost of the battery module.

[0009] In some embodiments, the protective member includes a protective film, and the protective film is covered on the opening to cover the opening; or,

[0010] The protective member comprises a protective plate, and two oppositely arranged ends of the protective plate are respectively connected to the end surfaces of two adjacent battery cells to cover the opening.

[0011] Such an arrangement enriches the types of parts that the protective piece can include, reduces the difficulty of preparing the protective piece, and expands the applicable environment of the protective piece.

[0012] In some embodiments, the protective member includes a high temperature resistant member or foam.

[0013] When the protective part is a high temperature resistant part, if the battery cell experiences thermal runaway and the large amount of heat generated is transferred to the vicinity of the cooling plate, the protective part can effectively block the heat, thereby reducing the probability of leakage of the cooling plate due to direct contact with a large amount of heat under the action of high temperature.

[0014] When the protective element is made of foam, the foam itself has excellent sealing, compression deformation resistance, and is suitable for various temperature environments. Therefore, it can not only reduce the probability of impurities such as particles passing through the protective element and entering the accommodating space, but also extend the service life of the protective element.

[0015] In some embodiments, the protective member includes a first part and a second part, the first part is connected to the battery cell, the second part covers the opening of the accommodating space, and the strength of the second part is greater than the strength of the first part.

[0016] Setting the strength of the second part to be greater than that of the first part can not only increase the use range of the second part, but also extend the service life of the second part.

[0017] In some embodiments, the protection element fills the accommodating space and contacts the cooling plate.

[0018] In this way, the protective member can protect the cooling plate while reducing the space it occupies in the battery module, thereby reducing the volume of the battery module.

[0019] In some embodiments, the protective member includes a first end and a second end that are disposed opposite to each other, the first end is in contact with the cooling plate, and a distance L between the second end and the cooling plate is 0 mm<L<3 mm.

[0020] In this way, the thickness of the protective member can be reduced as much as possible without affecting the function of the protective member, and the probability of the protective member interfering with other components in the battery module can be reduced.

[0021] In some embodiments, the protective member includes insulating glue.

[0022] Such an arrangement can not only reduce the difficulty of obtaining the protective member, but also improve the connection stability between the protective member and the accommodating space, thereby improving the protective effect of the protective member on the cooling plate.

[0023] In some embodiments, the battery module further includes an electrical connector, which is located on one side of the battery cell and electrically connects two adjacent battery cells;

[0024] The protective member is located between the electrical connector and the battery core, and is spaced apart from the electrical connector.

[0025] Because the protective member is arranged on the side where the electrical connector is located and the protective member is made of insulating material, the electrical clearance and creepage distance at this time can be appropriately increased, thereby improving electrical safety.

[0026] In a second aspect, the present application provides a battery, which includes the battery module in the above embodiment.

[0027] Because the battery's protective part can prevent the cooling plate from directly contacting the outside world through the accommodating space, when the battery cell has thermal runaway, the protective part can block the gas or particles generated by the thermal runaway of the battery cell, thereby reducing the probability of gas or particles entering the accommodating space to act on the cooling plate and causing damage or even failure of the cooling plate, thereby effectively protecting the cooling plate.

[0028] In addition, during the assembly process of the battery module, the protective component can also protect the cooling plate, reduce the probability of impurities such as particles entering the accommodating space and causing damage to the cooling plate, resulting in damage or even failure of the cooling plate.

[0029] In a third aspect, the present application provides an electrical device, which includes the battery in the above embodiment.

[0030] Because the protective part of the electrical device can prevent the cooling plate from directly contacting the outside world through the accommodating space, when the battery cell has thermal runaway, the protective part can block the gas or particles generated by the thermal runaway of the battery cell, so as to reduce the probability of gas or particles entering the accommodating space to act on the cooling plate and cause damage or even failure of the cooling plate, thereby effectively protecting the cooling plate.

[0031] In addition, during the assembly process of the battery module, the protective component can also protect the cooling plate, reduce the probability of impurities such as particles entering the accommodating space and causing damage to the cooling plate, resulting in damage or even failure of the cooling plate.

[0032] 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

[0033] 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:

[0034] Figure 1 is a schematic diagram of the structure of a vehicle according to one or more embodiments.

[0035] Figure 2 is an exploded view of a battery according to one or more embodiments.

[0036] Figure 3 It is a schematic diagram of the exploded structure of a battery cell according to one or more embodiments.

[0037] Figure 4 Schematic diagram of the structure of a battery module according to one or more embodiments.

[0038] Figure 5 is an exploded view of a battery module according to one or more embodiments.

[0039] Figure 6 is a cross-sectional view of a battery module protection member including a protection film according to one or more embodiments.

[0040] Figure 7 for Figure 6 A magnified schematic diagram of center A.

[0041] Figure 8 It is a cross-sectional view of a battery module when a protective member is filled in an accommodating space according to one or more embodiments.

[0042] Fig. 9 for Figure 8 A magnified schematic diagram of point B in the middle.

[0043] The reference numerals in the specific implementation manner are as follows:

[0044] 1000. Vehicles;

[0045] 100, battery; 200, controller; 300, motor;

[0046] 10. Box body; 11. First part; 12. Second part;

[0047] 20. Battery module; 21. Battery cell; 211. End cover; 211a. Electrode terminal; 212. Shell; 213. Battery cell assembly; 22. Cooling plate; 23. Accommodation space; 24. Protective member; 25. Electrical connector; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] In the description of the embodiments of the present application, if technical terms such as "first" and "second" appear, they 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.

[0051] 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.

[0052] In the description of the embodiments of the present application, if the term "and / or" appears, it is only a description of the association relationship of the associated objects, indicating that three relationships may exist. 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, if it appears, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, if it appears, 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).

[0054] In the description of the embodiments of the present application, if any, 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 the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does 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 cannot be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, if any technical terms such as "installed", "connected", "connected", "fixed" and the like are to be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power 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 the application field of power batteries, the market demand is also constantly expanding.

[0057] In the actual application of battery charging and discharging, chemical energy and electrical energy cannot be completely converted. A part of it will be converted into heat energy. The uncontrollable abnormal change of battery temperature can also be called thermal runaway. When thermal runaway occurs, the cooling plate inside the battery may leak and cause the cooling plate to fail.

[0058] In order to protect the cooling plate and improve the problem of cooling plate failure when the battery has thermal runaway, an embodiment of the present application provides a battery module. The cooling plate in the battery module is arranged between two adjacent battery cells, and a protective member is arranged above the cooling plate to protect the cooling plate, thereby reducing the probability of thermal runaway extending to the cooling plate and causing the cooling plate to fail.

[0059] The battery module disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system of the electrical device can be composed of the battery module disclosed in the present application.

[0060] The embodiment of the present application provides an electric device using a battery as a power source, and 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. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0061] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0062] 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.

[0063] 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.

[0064] Please refer to Figure 2 , Figure 2An exploded view of a battery 100 provided for some embodiments of the present application. The battery 100 includes a housing 10 and a battery module 20. The battery module 20 is generally composed of an electrical connector 25 and a plurality of battery cells 21 connected in series or in parallel. The battery cells 21 are contained in the housing 10. The housing 10 is used to provide a storage space for the battery cells 21, and the housing 10 may adopt a variety of structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 jointly define a storage space for accommodating the battery cells 21. The second portion 12 may be a hollow structure with one end open, the first portion 11 may be a plate-like structure, the first portion 11 covers the open side of the second portion 12, so that the first portion 11 and the second portion 12 jointly define a storage space; the first portion 11 and the second portion 12 may also be hollow structures with one side open, and the open side of the first portion 11 covers the open side of the second portion 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0065] In the battery 100, there can be multiple cells 21, and the multiple cells 21 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple cells 21 are both connected in series and in parallel. The multiple cells 21 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple cells 21 is accommodated in the box 10; of course, the battery 100 can also be a battery module formed by connecting multiple cells 21 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple cells 21.

[0066] Each battery cell 21 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 21 may be cylindrical, flat, rectangular, or in other shapes.

[0067] Please refer to Figure 3 , Figure 3 The schematic diagram of the decomposition structure of the battery cell 21 provided in some embodiments of the present application. The battery cell 21 refers to the smallest unit that constitutes the battery. Figure 3 The battery cell 21 includes an end cover 211, a shell 212, a battery cell assembly 213 and other functional components.

[0068] The end cap 211 refers to a component that covers the opening of the shell 212 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 211 can be adapted to the shape of the shell 212 to match the shell 212. It is possible that the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 211 is not easily deformed when it is squeezed and collided, so that the battery cell 21 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 211a can be provided on the end cap 211. The electrode terminal 211a can be used to electrically connect with the battery cell assembly 213 to output or input the electric energy of the battery cell 21. In some embodiments, the end cap 211 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. The material of the end cap 211 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 211, and the insulating member may be used to isolate the electrical connection components in the housing 212 from the end cap 211 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0069] The shell 212 is a component used to cooperate with the end cap 211 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the battery cell assembly 213, electrolyte and other components. The shell 212 and the end cap 211 can be independent components, and an opening can be set on the shell 212, and the internal environment of the battery cell 21 is formed by covering the opening with the end cap 211 at the opening. Without limitation, the end cap 211 and the shell 212 can also be integrated. Specifically, the end cap 211 and the shell 212 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 212, the end cap 211 covers the shell 212. The shell 212 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 212 can be determined according to the specific shape and size of the battery cell assembly 213. The shell 212 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0070] The battery cell assembly 213 is a component in the battery cell 21 where electrochemical reactions occur. One or more battery cell assemblies 213 may be included in the housing 212. The battery cell assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active substances constitute the main body of the battery cell, and the parts of the positive and negative electrode sheets without active substances each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active substance and the negative active substance react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0071] See also Figure 4 and Figure 5 Some embodiments of the present application provide a battery module 20, which includes battery cells 21, a cooling plate 22, and a protective member 24. The battery cells 21 are arranged at intervals along a first direction X; the cooling plate 22 is disposed between two adjacent battery cells 21 along the first direction X, and at least one side of the outer periphery of the two adjacent battery cells 21 and the cooling plate 22 located therebetween can jointly form an accommodation space 23; the protective member 24 at least covers at least one side of the cooling plate 22 to form the accommodation space 23.

[0072] An accommodation space 23 can be formed between at least one side of the outer periphery of each cooling plate 22 and two adjacent battery cells 21. For example, in the third direction Z, an accommodation space 23 can be formed between two opposite sides of the outer periphery of each cooling plate 22 and two adjacent battery cells 21. Alternatively, an accommodation space 23 can be formed between two opposite sides of the outer periphery of each cooling plate 22 and two adjacent battery cells 21. The third direction Z, the first direction X, and the second direction Y intersect each other.

[0073] The cooling plate 22 is used to remove the heat of the battery cell 21 when the battery cell 21 is running, so as to cool the battery cell 21, thereby protecting the cooling plate 22. The cooling plate 22 can be, but is not limited to, a water-cooled plate, and the cooling plate 22 can be arranged in the accommodating space 23 or the cooling plate 22 covers the accommodating space 23 to prevent the end surface of the cooling plate 22 from directly contacting the outside through the accommodating space 23.

[0074] The protective member 24 may be, but is not limited to, Figure 5 The long strip structure shown in the figure can be adjusted according to actual conditions.

[0075] For example, Figure 5As shown, a plurality of battery cells 21 can be distributed at intervals along a first direction X, and in a second direction Y perpendicular to the first direction X, two adjacent battery cells 21 are arranged close to each other. In other words, in the second direction Y, a plurality of battery cells 21 can together form a group of long strip battery cells 21. Along the first direction X, a cooling plate 22 is provided between each group of long strip battery cells 21, and each cooling plate 22 can cool the surfaces of the battery cells 21 arranged opposite to each other in two adjacent groups of battery cells 21. An accommodating space 23 can be formed between the opposite sides of the outer periphery of each cooling plate 22 and the two adjacent battery cells 21, and the protective member 24 can cover the accommodating space 23.

[0076] Because the protective member 24 can prevent the cooling plate 22 from directly contacting the outside world through the accommodating space 23, when the battery cell 21 has thermal runaway, the protective member 24 can block the gas or particles generated by the thermal runaway of the battery cell 21, thereby reducing the probability of the gas or particles entering the accommodating space 23 to act on the cooling plate 22 and causing damage or even failure of the cooling plate 22, thereby effectively protecting the cooling plate 22.

[0077] In addition, during the assembly process of the battery module 20 , the protective member 24 can also protect the cooling plate 22 , reducing the probability of impurities such as particles entering the accommodating space 23 and damaging the cooling plate 22 , resulting in damage or even failure of the cooling plate 22 .

[0078] like Figure 6 As shown, in some embodiments, the accommodating space 23 is formed with an opening on a side away from the cooling plate 22; and the protective member 24 covers the opening.

[0079] The above opening can be understood as a passage for particles and other foreign matter to enter the accommodating space 23. Using the protective member 24 to cover the opening can block the path for particles and the like to enter the accommodating space 23, and compared with protecting the entire cooling plate 22, only the protective member 24 is set to cover the opening, which can reduce the amount of the protective member 24, thereby reducing the production cost of the battery module 20.

[0080] In some embodiments, the protective member 24 includes a protective film, which covers the opening to cover the opening; or, the protective member 24 includes a protective plate, whose opposite ends are respectively connected to the end faces of two adjacent battery cells 21 to cover the opening.

[0081] In other words, the protection member 24 can include different components to cover the opening. One is to cover the opening with a protection film, and the other is to cover the opening with a protection plate.

[0082] For example, Figure 7 As shown, when the protection member 24 includes a protection film, the protection film may be adhered to the surfaces of two adjacent battery cells 21 or to the side wall of the accommodating space 23 to cover the opening.

[0083] When the protective member 24 includes a protective plate (not shown in the figure), the connection between the two ends of the protective plate and the end faces of the two adjacent battery cells 21 can be fixed or detachable. For example, the protective plate and the two adjacent battery cells 21 can be but are not limited to adhesive or clamping.

[0084] Such an arrangement enriches the types of parts that the protective member 24 may include, reduces the difficulty of preparing the protective member 24 , and expands the applicable environment of the protective member 24 .

[0085] In some embodiments, the protective member 24 includes a high temperature resistant member or foam.

[0086] Exemplarily, when the protective member 24 includes a high temperature resistant member, if the battery cell 21 experiences thermal runaway and a large amount of heat generated therein is transferred to the vicinity of the cooling plate 22, the protective member 24 can effectively block the heat, thereby reducing the probability of leakage of the cooling plate 22 due to direct contact with a large amount of heat under the action of high temperature.

[0087] When the protective member 24 is made of foam, the foam itself has excellent sealing, compression deformation resistance, and is suitable for various temperature environments. Therefore, it can not only reduce the probability of impurities such as particles passing through the protective member 24 and entering the accommodating space 23, but also extend the service life of the protective member 24.

[0088] In some embodiments, the protective member 24 includes a first portion and a second portion, the first portion is connected to the battery cell 21 , the second portion covers the opening of the accommodating space 23 , and the strength of the second portion is greater than that of the first portion.

[0089] Because the side of the second part facing the opening and the side facing away from the opening are both suspended, and one side of the first part is in contact with the battery cell 21, the first part can be supported by the battery cell 21, and the second part has no supporting parts. If a large number of particles accumulate on the second part, and the second part has no supporting parts, the second part may collapse or even break.

[0090] Therefore, setting the strength of the second part to be greater than the strength of the first part can not only increase the use range of the second part, but also extend the service life of the second part.

[0091] like Figure 8 As shown, in some embodiments, the protection member 24 fills the accommodating space 23 and contacts the cooling plate 22 .

[0092] Exemplarily, when the protective member 24 is in a gel-like state and is filled in the accommodating space 23 , the protective member 24 can protect the cooling plate 22 while reducing the space it occupies in the battery module 20 , thereby reducing the volume of the battery module 20 .

[0093] Specifically, Fig. 9 As shown, in some embodiments, the protective member 24 includes a first end and a second end that are oppositely disposed, the first end is in contact with the cooling plate 22, and the distance between the second end and the cooling plate 22 is L, 0mm<L<3mm. The specific value of L can be 1mm, 1.5mm, 1.8mm, 2mm, 2.7mm, 3mm, and any value between two adjacent values.

[0094] The second end of the protective member 24 usually does not protrude from the surface of the battery cell 21 , so the thickness of the protective member 24 can be reduced as much as possible without affecting the function of the protective member 24 and reducing the probability of the protective member 24 interfering with other components in the battery module 20 .

[0095] In some embodiments, the protective member 24 includes insulating glue.

[0096] For example, the protective member 24 may be silicone adhesive. Silicone adhesive is a material similar to ointment, which can quickly solidify after contacting moisture in the air to form a tough rubber-like solid. Silicone adhesive itself has strong adhesion, large tensile strength and weather resistance.

[0097] Such a configuration can not only reduce the difficulty of obtaining the protective member 24 , but also improve the connection stability between the protective member 24 and the accommodating space 23 , thereby improving the protective effect of the protective member 24 on the cooling plate 22 .

[0098] like Figure 4 and Figure 5 As shown, in some embodiments, the battery module 20 also includes an electrical connector 25, which is located on one side of the battery cell 21 and electrically connects two adjacent battery cells 21; the protective member 24 is located between the electrical connector 25 and the battery cell 21, and is spaced apart from the electrical connector 25.

[0099] The electrical connector 25 may be, but is not limited to, a bar, which may be used to electrically connect two adjacent battery cells 21 and perform operations such as current distribution on the battery cells 21 .

[0100] Because the protective member 24 is disposed on the side where the electrical connector 25 is located, and the protective member 24 is made of insulating material, the electrical clearance and creepage distance at this time can be appropriately increased, thereby improving electrical safety.

[0101] The present application also provides a battery, which includes the battery module 20 in any of the above embodiments. For the relevant contents of the battery module 20, please refer to the above contents, which will not be repeated here.

[0102] Because the battery's protective member 24 can prevent the cooling plate 22 from directly contacting the outside world through the accommodating space 23, when the battery cell 21 has thermal runaway, the protective member 24 can block the gas or particles generated by the thermal runaway of the battery cell 21, thereby reducing the probability of the gas or particles entering the accommodating space 23 to act on the cooling plate 22 and causing damage or even failure of the cooling plate 22, thereby effectively protecting the cooling plate 22.

[0103] In addition, during the assembly process of the battery module 20 , the protective member 24 can also protect the cooling plate 22 , reducing the probability of impurities such as particles entering the accommodating space 23 and damaging the cooling plate 22 , resulting in damage or even failure of the cooling plate 22 .

[0104] In addition, the present application also provides an electric device. The electric device includes the battery in any of the above embodiments. For the relevant contents of the electric device, please refer to the contents recorded above, which will not be repeated here.

[0105] Because the protective member 24 of the electrical device can prevent the cooling plate 22 from directly contacting the outside world through the accommodating space 23, when the battery cell 21 has thermal runaway, the protective member 24 can block the gas or particles generated by the thermal runaway of the battery cell 21, thereby reducing the probability of the gas or particles entering the accommodating space 23 to act on the cooling plate 22 and causing damage or even failure of the cooling plate 22, thereby effectively protecting the cooling plate 22.

[0106] In addition, during the assembly process of the battery module 20 , the protective member 24 can also protect the cooling plate 22 , reducing the probability of impurities such as particles entering the accommodating space 23 and damaging the cooling plate 22 , resulting in damage or even failure of the cooling plate 22 .

[0107] like Figure 5 As shown, in one embodiment, the battery module 20 includes a plurality of battery cells 21 spaced apart along a first direction X. In the second direction Y, the plurality of battery cells 21 may together form a group of elongated battery cells 21. A cooling plate 22 is provided between each group of elongated battery cells 21. In the third direction, an accommodation space 23 can be formed between two adjacent battery cells 21 and opposite sides of the outer periphery of each cooling plate 22. The accommodation space 23 is formed with an opening on a side away from the cooling plate 22; the protective member 24 covers the opening.

[0108] When thermal runaway occurs in the battery cell 21 , the protective member 24 can block the gas or particles generated by the thermal runaway of the battery cell 21 , thereby reducing the probability of the gas or particles entering the accommodating space 23 and acting on the cooling plate 22 , causing damage or even failure of the cooling plate 22 , thereby effectively protecting the cooling plate 22 .

[0109] In addition, during the assembly process of the battery module 20 , the protective member 24 can also protect the cooling plate 22 , reducing the probability of impurities such as particles entering the accommodating space 23 and damaging the cooling plate 22 , resulting in damage or even failure of the cooling plate 22 .

[0110] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery module, characterized in that: include: The battery cells are arranged at intervals along a first direction; A cooling plate is arranged between two adjacent battery cells along the first direction, and the two adjacent battery cells and at least one side of the outer periphery of the cooling plate located therebetween can jointly form an accommodating space; The protective member at least covers at least one side of the accommodating space formed by the cooling plate.

2. The battery module according to claim 1, characterized in that: The accommodating space is formed with an opening on a side away from the cooling plate; and the protective member covers the opening.

3. The battery module according to claim 2, characterized in that: The protective member includes a protective film, and the protective film is covered on the opening to cover the opening; or, The protective member comprises a protective plate, and two oppositely disposed ends of the protective plate are respectively connected to end surfaces of two adjacent battery cells to cover the opening.

4. The battery module according to claim 2, characterized in that: The protective member includes a high temperature resistant member or foam.

5. The battery module according to claim 3, characterized in that: The protective member includes a first part and a second part, the first part is connected to the battery core, the second part covers the opening of the accommodating space, and the strength of the second part is greater than that of the first part.

6. The battery module according to claim 1, characterized in that: The protection member is filled in the accommodating space and is in contact with the cooling plate.

7. The battery module according to claim 6, characterized in that: The protective member includes a first end and a second end that are oppositely disposed, the first end is in contact with the cooling plate, and a distance L between the second end and the cooling plate is 0 mm < L < 3 mm.

8. The battery module according to claim 6, characterized in that: The protective member includes insulating glue.

9. The battery module according to claim 1, characterized in that: The battery module further includes an electrical connector, which is located on one side of the battery cell and electrically connects two adjacent battery cells; The protective member is located between the electrical connector and the battery core, and is spaced apart from the electrical connector.

10. A battery, characterized in that: Comprising the battery module as described in any one of claims 1 to 9.

11. An electrical device, characterized in that: Comprising the battery as claimed in claim 10.

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