Battery device and electric equipment

Abstract

The utility model relates to the related technical field of batteries, and discloses a battery device and electric equipment, the battery device comprises a box body, a battery monomer assembly, a supporting piece and a plugging piece, the box body is provided with a first wall; the battery monomer assembly is arranged in the box body, the battery monomer assembly comprises a plurality of battery monomers, each battery monomer is provided with a first pressure relief mechanism, and the first pressure relief mechanism is arranged towards the first wall; the supporting piece is arranged between the battery monomer assembly and the first wall, a discharge cavity channel is arranged between the supporting piece and the first wall, the supporting piece is provided with mutually independent first discharge ports corresponding to the first pressure relief mechanisms, and the first pressure relief mechanisms are communicated with the discharge cavity channel through the corresponding first discharge ports; each of the plurality of first discharge ports is provided with a blocking piece, and the blocking pieces are arranged to block the corresponding first discharge ports and are arranged to be actuated by the emissions discharged to the first discharge ports by the corresponding battery monomers, so that the first discharge ports are opened. Isolation protection between the single batteries is achieved, and heat diffusion is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a battery device and electrical equipment. Background Art

[0002] This section merely provides background information related to the present application and is not necessarily prior art.

[0003] As an energy supply device, battery devices are widely used in various industries. During the use of battery devices, there is a risk of thermal runaway. How to reduce the spread of thermal runaway in battery devices is an important research direction for battery devices. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical equipment to at least alleviate the problem of thermal runaway spreading of the battery device.

[0005] A first aspect of the present application provides a battery device, comprising a box body, a battery cell assembly, a support member and a plugging member, wherein the box body has a first wall; the battery cell assembly is arranged in the box body, the battery cell assembly includes a plurality of battery cells, the battery cells have a first pressure relief mechanism, the first pressure relief mechanism is arranged toward the first wall and is used to discharge the discharge in the battery cells; the support member is arranged between the battery cell assembly and the first wall, and a discharge cavity is arranged between the support member and the first wall, the support member is provided with first discharge ports independent of each other corresponding to each of the first pressure relief mechanisms, and each of the first pressure relief mechanisms is connected to the discharge cavity through the corresponding first discharge port; the plurality of first discharge ports are respectively provided with the plugging members, the plugging members are at least partially arranged in the corresponding first discharge ports, the plugging members are arranged to block the corresponding first discharge ports, and the plugging members are arranged to be actuated by the discharge discharged from the corresponding battery cells to the first discharge ports, so that the first discharge ports are opened.

[0006] In the technical solution of the embodiment of the present application, when a battery cell in the battery device experiences thermal runaway, the first pressure relief mechanism of the battery cell in thermal runaway is actuated, and the emissions therein flow to the blocking member through the actuating portion of the first pressure relief mechanism, and the blocking member opens the first discharge port under the action of the emissions, and the emissions flow to the discharge cavity through the first discharge port for discharge, thereby releasing the pressure and emissions of the battery cell in thermal runaway; the first discharge port corresponding to the battery cell that has not experienced thermal runaway remains blocked by the blocking member, and the blocking member implements isolation protection between the battery cells, blocks the flow path of emissions from thermal runaway flowing to the battery cell that has not experienced thermal runaway, reduces the possibility of emissions in the discharge cavity flowing to the battery cell that has not experienced thermal runaway, and plays a role in reducing heat diffusion.

[0007] In addition, the battery device according to the present application may also have the following additional technical features:

[0008] In some embodiments of the present application, the plugging member is configured to be released from the first discharge port to the discharge cavity under the stamping effect of the discharge discharged from the corresponding battery cell, so that the first discharge port is opened. The plugging member of the battery device of this embodiment is configured to be released outward under the stamping effect of the discharge discharged from the corresponding battery cell to open the first discharge port, so that the plugging member corresponding to the battery cell with thermal runaway can open the first discharge port more smoothly, and the structure is simple and reliable.

[0009] In some embodiments of the present application, the blocking member includes a first limiting portion, and the first limiting portion cooperates with the support member to limit the blocking member from moving along the first discharge port in a direction away from the discharge channel. The blocking member of this embodiment is provided with a first limiting portion, which can reduce the possibility that the blocking member is moved by other thermal runaway battery cells and the first discharge port is opened, thereby improving the isolation and protection effect of the blocking member on the battery cells and reducing heat diffusion.

[0010] In some embodiments of the present application, the first discharge port is arranged on the side of the support member facing the discharge channel, and the plugging member includes a first limiting portion, which is pressed against the side of the support member facing the discharge channel. In this embodiment, the side of the support member facing the discharge channel is pressed against the first limiting portion to limit the plugging member from moving in the direction away from the discharge channel (refer to the direction of the arrow pointing upward in the Z direction) along the first discharge port. The structure is simple and the assembly is convenient. The plugging member can be directly arranged on the first discharge port of the existing support member without improving the support member. The cost is low and the impact on the structure of the battery device is small.

[0011] In some embodiments of the present application, the first limiting portion is arranged around the blocking member, and is arranged to block the end of the first discharge port facing the discharge channel. In this embodiment, the first limiting portion of the blocking member is arranged in a circle, and its supporting and limiting function is good, which can improve the effect of limiting the blocking member from moving along the first discharge port in the direction away from the discharge channel; at the same time, the blocking member can achieve blocking at any position of the first discharge port in the circumferential direction, and the blocking effect is good, which can reduce the possibility of the discharge in the discharge channel (discharge from other battery cells discharged into the discharge channel) flowing back into the first discharge port, and improve the isolation and protection function of the blocking member on each battery cell.

[0012] In some embodiments of the present application, the first limiting portion is configured to be elastic, and the first limiting portion elastically presses against the side of the support member facing the discharge cavity. By configuring the first limiting portion to elastically abut against the support member, the sealing effect of the first limiting portion on the first discharge port can be improved, and the possibility of the discharge in the discharge cavity (discharge from other battery cells discharged into the discharge cavity) flowing back into the first discharge port can be reduced, thereby improving the isolation and protection effect of the blocking member on each battery cell.

[0013] In some embodiments of the present application, the first limiting portion is elastically pressed against the support member at least along the radial edge of the plugging member, and the radial edge of the first limiting portion along the plugging member is configured to be warped toward the first discharge port in a natural state. When the plugging member is assembled to the first discharge port, the radial edge of the first limiting portion can be elastically deformed from the natural state toward the direction away from the first discharge port, and then pressed against the support member. In this way, the radial edge of the first limiting portion has a restoring elastic force toward the first discharge port, and the restoring elastic force enables the first limiting portion to be elastically pressed against the support member better, thereby improving the sealing effect of the first limiting portion on the first discharge port, reducing the possibility of the discharge in the discharge channel (the discharge discharged into the discharge channel by other battery cells) flowing back into the first discharge port, and improving the isolation and protection effect of the plugging member on each battery cell.

[0014] In some embodiments of the present application, the plugging member is a heat-resistant member. The plugging member is set as a heat-resistant member, and the plugging member can be set to be released from the first discharge port to the discharge cavity under the stamping effect of the discharge discharged by the corresponding battery cell, so that the first discharge port is opened. The plugging member of this embodiment can open the first discharge port relatively smoothly, and due to the heat resistance of the plugging member, the possibility of the discharge in the discharge cavity (discharged by other battery cells into the discharge cavity) corroding and melting the plugging member, thereby opening the first discharge port, can be reduced, thereby improving the isolation and protection effect of the plugging member on each battery cell.

[0015] In some embodiments of the present application, the plugging member is configured to be connected to the first discharge port by snapping or interference fitting. The plugging member is connected to the first discharge port by snapping or interference fitting, which is not only simple in structure and convenient to assemble, but also more solid in structure than bonding by tape or the like; at the same time, the plugging member is easy to separate from the support member to open the first discharge port, which is conducive to timely discharge of emissions generated by thermal runaway, so as to reduce the risk caused by thermal runaway.

[0016] In some embodiments of the present application, the plugging member is at least partially configured to have elasticity, and the plugging member and the support member are elastically pressed together so that the plugging member is snap-fitted or interference-connected to the first discharge port. This facilitates the assembly of the plugging member to the first discharge port, and the plugging member is fixed by elasticity, and can be elastically deformed to facilitate the separation of the plugging member from the support member and open the first discharge port, which is conducive to timely discharge of emissions generated by thermal runaway, so as to reduce the risk of thermal runaway.

[0017] In some embodiments of the present application, the plugging member includes a second limiting portion, the second limiting portion is pressed against the end face of the peripheral wall surrounding the first discharge port facing the battery cell, the second limiting portion is set to be elastic, and the second limiting portion is configured to be able to deform under the impact of the discharge discharged by the corresponding battery cell to escape from the first discharge port to the discharge cavity. The second limiting portion of the plugging member is set to be elastic, which facilitates the assembly of the plugging member to the first discharge port, and the second limiting portion can be elastically deformed to facilitate the separation of the plugging member from the support member and open the first discharge port, which is conducive to the timely discharge of the discharge generated by thermal runaway, so as to reduce the risk of thermal runaway. At the same time, the plugging member relies on the elastic second limiting portion to press against the end face of the discharge port facing the battery cell, and the fixing stability of the plugging member is relatively high, which reduces the possibility of the plugging member being separated from the first discharge port under the condition of vibration of the battery device, and improves the protective performance of the plugging member.

[0018] In some embodiments of the present application, the second limiting portion is arranged around the blocking member, and the second limiting portion blocks the end of the first discharge port away from the discharge cavity. The second limiting portion of the blocking member is arranged in a circle, and its supporting and limiting function is good, which can improve the stability of the blocking member in the first discharge port, reduce the possibility of the blocking member being separated from the first discharge port under the condition of vibration of the battery device, and improve the protective performance of the blocking member; at the same time, the blocking member can achieve the blocking of any position of the first discharge port in the circumferential direction through the second limiting portion, and the blocking effect is good, which can reduce the possibility of the discharge in the discharge cavity (the discharge of other battery cells discharged into the discharge cavity) flowing back into the first discharge port, and improve the isolation and protection function of the blocking member on each battery cell.

[0019] In some embodiments of the present application, the second position-limiting portion includes a first guide sub-portion, the first guide sub-portion is arranged at one end of the second position-limiting portion facing the battery cell, and the first guide sub-portion is gradually expanded along the direction of the battery cell assembly toward the first wall; and / or, the second position-limiting portion includes a second guide sub-portion, the second guide sub-portion is arranged at one end of the second position-limiting portion facing the first wall, and the second guide sub-portion is gradually contracted along the direction of the battery cell assembly toward the first wall. By providing the first guide sub-portion, the plugging member can be assembled to the first discharge port more conveniently; by providing the second guide sub-portion, the convenience of the plugging member being disengaged from the first discharge port can be improved, so that the battery device can be depressurized in time.

[0020] In some embodiments of the present application, the second limiting portion is at least partially arranged in a hollow ring shape around the circumference of the sealing member. The second limiting portion is at least partially provided with a hollow ring structure. When the second limiting portion is squeezed radially, the second limiting portion is easily compressed and deformed, which is conducive to improving the assembly convenience of the second limiting portion, and also allows the sealing member to be more easily disengaged from the first discharge port after being impacted. In addition, the hollow portion of the second limiting portion can face the first pressure relief mechanism and be connected to the first pressure relief mechanism. The emissions discharged through the first pressure relief mechanism can concentrate on impacting the hollow portion of the second limiting component, so that the middle portion of the second limiting portion is concave and the circumferential edge is deformed radially inward, thereby improving the ability of the sealing member to be disengaged from the first discharge port under the action of the emissions.

[0021] In some embodiments of the present application, the plugging member further comprises a first limiting portion, a connecting portion and a main body portion, the main body portion is arranged at the first discharge port, the connecting portion is arranged around the main body portion and is arranged at the first discharge port, the connecting portion and the main body portion are arranged at intervals, the second limiting portion is connected to one end of the main body portion facing the battery monomer assembly and one end of the connecting portion facing the battery monomer assembly, the first limiting portion abuts against the side of the support member facing the discharge cavity, and the first limiting portion and the second limiting portion are connected through the connecting portion. The first limiting portion is connected to the second limiting portion through the connecting portion, and the action applied to the first limiting portion can cause the second limiting portion to deform, thereby improving the convenience of assembly operation of the plugging member. At the same time, the connecting portion and the main body portion are arranged at intervals, so that there is a movable gap between the connecting portion and the main body portion, so that the first limiting portion can drive the connecting portion to move toward the main body portion, so that the second limiting portion connected to the connecting portion is compressed in the radial direction, further improving the convenience of assembly operation of the plugging member.

[0022] In some embodiments of the present application, the blocking member is configured as a rubber plug with an integral structure.

[0023] In some embodiments of the present application, the support member is further provided with a second discharge port corresponding to each of the first discharge ports, a connecting cavity is provided in the support member, the first discharge port is provided on the side of the support member facing the discharge cavity, the second discharge port is provided on the side of the support member facing the battery cell assembly, the second discharge port is connected with the corresponding first discharge port through the connecting cavity, and the first pressure relief mechanism is provided toward the second discharge port. The plugging member of the battery device is plugged on the side of the support member close to the discharge cavity, and the first pressure relief mechanism is provided on the side of the support member close to the battery cell assembly. When the discharge of other battery cells flows into the discharge cavity, even if a small amount of discharge penetrates the plugging member and enters the first discharge port, since the first pressure relief mechanism is far away from the plugging member, the influence of these discharges on the first pressure relief mechanism of the battery cell that is not in thermal runaway can be reduced.

[0024] In some embodiments of the present application, the support member includes a first plate, a second plate and a support beam, the second plate is arranged on the side of the first plate facing the battery cell assembly, the support beam is arranged between the first plate and the second plate and connects the first plate and the second plate, the support beam, the first plate and the second plate are arranged to form the connecting cavity, the first plate and the first wall form the discharge cavity, the first discharge port is arranged on the first plate, and the second discharge port is arranged on the second plate. The support member has a simple structure and is easy to assemble by arranging the first plate, the support beam and the second plate, and the support beam is arranged between the first plate and the second plate, so that there is a gap between the first plate and the second plate, which can improve the buffering protection effect of the support member on the battery cell assembly.

[0025] In some embodiments of the present application, the battery device further comprises an insulating member, the insulating member is arranged between the support member and the battery cell, the insulating member is covered on the first pressure relief mechanism and blocks the second discharge port, and the insulating member is configured to be actuated under the action of the discharge to open the second discharge port. The insulating member is arranged between the support member and the battery cell, which can reduce the possibility of short circuit of the battery cell caused by the conduction between the battery cell and the support member, thereby improving the performance of the battery device, and the insulating member can block the second discharge port, play a protective and isolating role for the discharge of the battery cell in thermal runaway, reduce the possibility of the discharge flowing to the battery cell that is not in thermal runaway, and reduce heat diffusion.

[0026] In some embodiments of the present application, the insulating member includes a first insulating portion and a second insulating portion connected to each other, the second insulating portion covers the first pressure relief mechanism and is at least partially disposed at the second discharge port, the first insulating portion surrounds the second insulating portion, and the first insulating portion is pressed between the battery cell and the support member. The insulating member is pressed and fixed between the battery cell and the support member by the first insulating portion, and has a simple structure and a good insulation effect.

[0027] In some embodiments of the present application, the second insulating part includes a main body and a heat-resistant part, the main body is covered with the first pressure relief mechanism and connected to the first insulating part, the heat-resistant part is arranged on the side of the main body away from the first pressure relief mechanism, and the heat-resistant part is arranged at the second discharge port, the main body is arranged to be destroyed under the action of the emission, and the heat-resistant part is carried away from the second discharge port. The main body is arranged on the side facing the first pressure relief mechanism, which can be destroyed by the emission, so that when the battery cell corresponding to the first pressure relief mechanism is in thermal runaway, the emission can be discharged in time; the heat-resistant part is arranged on the side away from the main body and away from the first pressure relief mechanism, when the emission generated by the thermal runaway of other battery cells flows to the heat-resistant part, the heat-resistant part is not easily destroyed, and can play a better isolation and protection role for the battery cell corresponding to the insulating part, reducing the possibility that the emission of other battery cells affects the current battery cell.

[0028] In some embodiments of the present application, the heat-resistant part is a mica sheet, and the main body and / or the first insulating part are a plastic sheet.

[0029] In some embodiments of the present application, the first wall is disposed on the bottom plate of the box.

[0030] The second aspect of the present application provides an electrical device, including the battery device provided in the present application or any embodiment of the present application, wherein the battery device is used to store or provide electrical energy. The electrical device of this embodiment has the beneficial effects of the battery device provided in the present application or any embodiment of the present application.

[0031] 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

[0032] 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 accompanying drawings to represent the same components. In the accompanying drawings:

[0033] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0034] Figure 2 A schematic diagram of a battery device proposed in some embodiments of the present application;

[0035] Figure 3 A schematic diagram of a battery cell proposed in some embodiments of the present application;

[0036] Figure 4 A schematic cross-sectional view of a battery device according to some embodiments of the present application;

[0037] Figure 5 for Figure 4 Enlarged view of the T section;

[0038] Figure 6 A partial structural schematic diagram of a battery device proposed in some embodiments of the present application;

[0039] Figure 7 for Figure 6 A partial cross-sectional view of AA;

[0040] Figure 8 for Figure 6 Schematic diagram of the split body;

[0041] Fig. 9 for Figure 8 A magnified view of part B;

[0042] Fig.10 A schematic diagram of the structure of the blocking member proposed in some embodiments of the present application;

[0043] Fig.11 A schematic diagram of a blocking member from one perspective provided in some embodiments of the present application;

[0044] Fig.12 for Fig.11 CC section view;

[0045] Fig.13 for Figure 7 A partial enlarged view of .

[0046] The reference numerals in the specific implementation manner are as follows:

[0047] 1000. Vehicles;

[0048] 100, battery device; 200, controller; 300, motor;

[0049] 110, box body; 111, top cover; 112, frame; 113, bottom plate; 114, first wall; 115, second pressure relief mechanism; 116, discharge cavity;

[0050] 120, battery cell assembly; 121, battery cell; 1211, housing; 1212, shell; 1213, end cover; 1214, electrode assembly; 1215, pole ear; 1216, electrode terminal; 1217, first pressure relief mechanism;

[0051] 130, support member; 131, first plate; 132, second plate; 133, support beam; 134, first discharge port; 135, second discharge port; 136, connecting cavity; 137, through hole;

[0052] 140, blocking member; 141, first limiting portion; 142, second limiting portion; 1421, first guiding sub-portion; 1422, second guiding sub-portion; 143, main body; 144, connecting portion;

[0053] 150, insulating member; 151, first insulating portion; 152, second insulating portion; 1521, main body portion; 1522, heat-resistant portion; 153, stopper portion. DETAILED DESCRIPTION

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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).

[0060] 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.

[0061] 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.

[0062] The battery device can provide electrical energy for electrical equipment, and a plurality of battery cells are generally arranged in the battery device. When the battery device has external short circuit, overcharge, needle puncture, plate impact and other situations, it is easy to cause thermal runaway of the battery cell. A large amount of smoke will be generated in the thermal runaway battery cell, and the smoke contains a certain proportion of combustible substances. When the pressure in the battery cell reaches the predetermined parameter, the smoke emissions will be released to the outside of the battery cell through the corresponding pressure relief mechanism on the battery cell, and the emissions discharged to the outside of the battery cell will be further discharged to the outside through the pressure relief mechanism of the battery device. The smoke emissions contain substances such as high-temperature smoke and volatile high-temperature electrolyte. These substances contain combustible components. With the participation of combustion-supporting materials such as oxygen, they are easily ignited by tiny ignition sources, causing violent combustion and even the risk of explosion.

[0063] When a battery cell in a battery device experiences thermal runaway, the high-temperature emissions it produces can easily cause other battery cells around it to experience thermal runaway, causing the thermal runaway to spread within the battery device, further increasing the scope and degree of harm. The problem of thermal runaway spreading within a battery device is an important factor leading to thermal runaway of the entire battery device. If the spread of thermal runaway can be effectively blocked and the thermal runaway can be limited to a single or partial battery cell that is currently experiencing thermal runaway, the harm to the battery device can be minimized.

[0064] Based on this, the present application provides a battery device, wherein a discharge port is provided on a support member supporting a battery cell, and a pressure relief mechanism of each battery cell is connected to a discharge cavity of the battery device through a discharge port, and a plugging member is provided at the discharge port, and the plugging member is configured to block the discharge port of the support member, and the plugging member can be actuated under the action of the discharge of the corresponding battery cell to open the discharge port.

[0065] When a battery cell in the battery device experiences thermal runaway, the first pressure relief mechanism of the battery cell in thermal runaway is actuated, and the exhaust gas therein flows to the exhaust port on the support member and acts on the plugging member, thereby actuating the plugging member, forming a flow channel for the exhaust gas to flow out at the exhaust port, and the exhaust gas can be discharged through the exhaust port, thereby releasing the pressure of the battery cell in thermal runaway; the exhaust port corresponding to the battery cell that has not experienced thermal runaway remains blocked by the plugging member, and the plugging member implements isolation protection between the battery cells, thereby reducing the possibility of the exhaust gas of the battery cell in thermal runaway flowing to the battery cell that has not experienced thermal runaway, thereby reducing the heat diffusion.

[0066] The battery device disclosed in the embodiment of the present application can be used in an electrical device, and a power supply system of the electrical device can be formed using the battery device disclosed in the present application to supply power to the electrical device.

[0067] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, 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.

[0068] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0069] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 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 device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 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 device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0070] It is understandable that the battery device 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 .

[0071] like Figure 2 As shown, Figure 2 Schematic diagram of a battery device proposed in some embodiments of the present application. The battery device 100 mentioned in the embodiments of the present application may include one or more battery cell assemblies 120 for providing voltage and capacity. The battery cell assembly 120 may include a plurality of battery cells 121, and the plurality of battery cells 121 are connected in series, in parallel, or in mixed connection through a busbar.

[0072] In some embodiments, the battery cell assembly 120 is generally formed by arranging a plurality of battery cells 121 .

[0073] As an example, the battery cell assembly 120 may be a battery module, which is formed by arranging and fixing a plurality of battery cells 121 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 121 by a cable tie.

[0074] In some embodiments, the battery device 100 may be a battery pack, which includes a case 110 and one or more battery cell assemblies 120 , wherein the battery cell assemblies 120 are accommodated in the case 110 .

[0075] As an example, the battery cell assembly 120 may be accommodated in the case 110 by fixing the battery module in the case 110 .

[0076] As an example, the battery cell assembly 120 may also be accommodated in the case 110 by directly fixing the plurality of battery cells 121 to the case 110 .

[0077] As an example, the box 110 may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box 110 to accommodate the battery cell assembly 120. The closed space here means covering or closing, which may be sealed or unsealed. The first box may be a top cover 111 or a bottom plate 113.

[0078] As an example, the box body 110 may include a top cover 111, a frame 112, and a bottom plate 113. The top cover 111 and the bottom plate 113 are respectively connected to the frame 112, so that a closed space is formed inside the box body 110 to accommodate the battery cell assembly 120.

[0079] In some embodiments, the box 110 may be a part of the chassis structure of the vehicle 1000. For example, part of the box 110 may become at least a part of the floor 113 of the vehicle 1000, or part of the box 110 may become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0080] In some embodiments, the battery device 100 refers to an energy storage device, which includes a cabinet, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0081] like Figure 3 As shown, Figure 3 This is a schematic diagram of a battery cell proposed in some embodiments of the present application. In the embodiments of the present application, the battery cell 121 may be a secondary battery, which refers to a battery cell 121 that can be continuously used by activating active materials by charging after the battery cell 121 is discharged.

[0082] The battery cell 121 can 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 storage battery, etc., which is not limited in the embodiments of the present application.

[0083] The battery cell 121 generally includes a housing 1211, an electrode assembly 1214 and an electrode terminal 1216, wherein the electrode terminal 1216 is disposed on the housing 1211, the electrode assembly 1214 is disposed in the housing 1211, and the electrode terminal 1216 is electrically connected to the pole ear 1215 of the electrode assembly 1214. The electrode assembly 1214 includes a positive electrode, a negative electrode and a separator, and the separator is disposed between the negative electrode and the positive electrode. During the charge and discharge process of the battery cell 121, active ions (such as lithium ions) are embedded and removed back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow active ions to pass through.

[0084] In some embodiments, a pressure relief mechanism is disposed on the housing 1211 of the battery cell 121. For ease of description, the pressure relief mechanism of the battery cell 121 is defined as a first pressure relief mechanism 1217. The first pressure relief mechanism 1217 is used to discharge the internal gas of the battery cell 121.

[0085] As an example, when the internal pressure or temperature of the battery cell 121 reaches a predetermined threshold, it is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 121 reaches a predetermined threshold, the first pressure relief mechanism 1217 performs an action or a weak structure provided in the first pressure relief mechanism 1217 is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode sheet, negative electrode sheet, electrolyte and separator in the battery cell 121.

[0086] As an example, the first pressure relief mechanism 1217 may be integrally formed with the housing 1211 .

[0087] As an example, the first pressure relief mechanism 1217 may also be separately provided and connected to the housing 1211 .

[0088] The "actuation" mentioned in this application means that the pressure relief mechanism is in action or activated to a certain state, so that the internal pressure and temperature of the battery cell 121 can be released. The action produced by the pressure relief mechanism may include but is not limited to: the components in the pressure relief mechanism move to form the discharge cavity 116, at least a part of the pressure relief mechanism ruptures, breaks, is torn or opened, and so on. When the first pressure relief mechanism 1217 is actuated, the high-temperature and high-pressure substances inside the battery cell 121 will be discharged from the actuated part as emissions. In this way, the battery cell 121 can be depressurized and cooled under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0089] In some embodiments, when the housing 1211 is a non-sealed structure, the first pressure relief mechanism 1217 can be configured as a through hole for discharging gas inside the battery cell 121 .

[0090] The emissions from the battery cells 121 mentioned in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, and the like.

[0091] In some implementations, the box 110 of the battery device 100 is provided with a pressure relief mechanism, and for ease of description, the pressure relief mechanism on the box 110 of the battery device 100 is defined as the second pressure relief mechanism 115. The first pressure relief mechanism 1217 is used to discharge the internal gas of the battery device 100.

[0092] As an example, when the internal pressure or temperature of the battery device 100 reaches a predetermined threshold, the second pressure relief mechanism 115 is actuated to release the internal pressure or temperature. When the internal pressure or temperature of the battery device 100 reaches a predetermined threshold, the second pressure relief mechanism 115 performs an action or a weak structure provided in the second pressure relief mechanism 115 is destroyed, thereby forming an opening or channel for internal pressure or temperature release. The threshold design varies according to different design requirements. Usually, after the first pressure relief mechanism 1217 of the battery cell 121 is actuated, the high-temperature and high-pressure substances in the battery cell 121 are discharged from the actuation part of the first pressure relief mechanism 1217 as emissions, the pressure or temperature in the box 110 can be increased. When the internal pressure or temperature of the battery device 100 reaches a predetermined threshold, the second pressure relief mechanism 115 is actuated, and the emissions are further discharged through the actuation part of the second pressure relief mechanism 115. In this way, the battery device 100 can be depressurized and temperature released under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0093] As an example, a discharge cavity 116 may be provided in the box body 110 , and the discharge cavity 116 is connected to the second pressure relief mechanism 115 . The first pressure relief mechanisms 1217 of the plurality of battery cells 121 may be connected to the same discharge cavity 116 and connected to the second pressure relief mechanism 115 through the discharge cavity 116 .

[0094] As an example, the second pressure relief mechanism 115 may be integrally formed with the box body 110 .

[0095] As an example, the second pressure relief mechanism 115 may also be separately provided and connected to the box body 110 .

[0096] In some embodiments, when the box body 110 is a non-sealed structure, the second pressure relief mechanism 115 can be configured as a through hole to discharge the gas inside the battery device 100 .

[0097] It should be noted that the technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells 121 or battery devices 100, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0098] like Figures 2 to 8 As shown, Figure 4 A schematic cross-sectional view of a battery device according to some embodiments of the present application is shown in FIG. Figure 5 for Figure 4 The enlarged view of the T section, Figure 6 This is a partial structural schematic diagram of a battery device proposed in some embodiments of the present application. Figure 7 for Figure 6 A partial cross-sectional view of AA, Figure 8 for Figure 6 Schematic diagram of the split body, Fig. 9 for Figure 8 The enlarged view of the B part of the embodiment of the present application provides a battery device 100, including a box body 110, a support member 130, a blocking member 140 and a battery cell assembly 120. The box body 110 has a first wall 114, and the battery cell assembly 120 is arranged in the box body 110. The battery cell assembly 120 includes a plurality of battery cells 121. The battery cell 121 has a first pressure relief mechanism 1217, and the first pressure relief mechanism 1217 is arranged toward the first wall 114, and is used to discharge the discharge in the battery cell 121. The support member 130 is arranged between the battery cell assembly 120 and the first wall 114, and a discharge channel 116 is arranged between the support member 130 and the first wall 114. The support member 130 is provided with a mutually independent first discharge port 134 corresponding to each first pressure relief mechanism 1217, and each first pressure relief mechanism 1217 is connected to the discharge channel 116 through the corresponding first discharge port 134. The plurality of first discharge ports 134 are respectively provided with a blocking member 140, which is at least partially disposed in the corresponding first discharge port 134, and is configured to block the corresponding first discharge port 134, and the blocking member 140 is configured to be actuated by the discharge of the corresponding battery cell 121 toward the first discharge port 134, so that the first discharge port 134 is opened.

[0099] The first wall 114 is one of the walls of the box body 110 , which is a wall of the box body 110 corresponding to the support member 130 , and specifically may be the bottom plate 113 , the top cover 111 and any side wall of the box body 110 .

[0100] The support member 130 is used to support the battery cell assembly 120, and the support member 130 can be disposed in the box body 110. Optionally, the support member 130 can be an integrally formed structure with the box body 110, or the support member 130 can be separately disposed and connected to the box body 110. The support member 130 can be disposed on the inner side of the top wall, the inner side of the side wall, or the inner side of the bottom plate 113 of the box body 110. As an example, the support member 130 can be a protective plate structure that protects the battery.

[0101] Exemplarily, the first wall 114 is the bottom plate 113 of the box body 110 , and the support member 130 is disposed at the bottom of the box body 110 and forms a discharge channel 116 between the support member 130 and the first wall 114 .

[0102] The discharge channel 116 is disposed in the housing 110 and is used for the discharge of the discharge from the battery cell 121. Specifically, when the battery cell 121 has thermal runaway or the like, the first pressure relief mechanism 1217 is actuated, and the discharge in the battery cell 121 flows to the first discharge port 134 through the actuation portion of the first pressure relief mechanism 1217, and flows to the discharge channel 116 through the first discharge port 134, and then is discharged out of the housing 110. The discharge channel 116 can be formed by the inner wall surface of the first wall 114 and the support member 130, and the first pressure relief mechanisms 1217 of multiple battery cells 121 in the battery cell assembly 120 can be connected to one discharge channel 116.

[0103] Optionally, the box body 110 may be provided with a second pressure relief mechanism 115, which is connected to the discharge channel 116 to discharge the discharge in the battery. Specifically, the discharge flowing into the discharge channel 116 flows to the second pressure relief mechanism 115, so that after the second pressure relief mechanism 115 is actuated, the discharge flows out from the actuation part of the second pressure relief mechanism 115. The first pressure relief mechanisms 1217 of multiple battery cells 121 in the battery cell assembly 120 may use one discharge channel 116 to communicate with the second pressure relief mechanism 115.

[0104] It can be understood that the communication between the discharge cavity 116 and the second pressure relief mechanism 115 can be understood as that the setting position of the second pressure relief mechanism 115 is connected to the discharge cavity 116 , and the discharge flowing through the discharge cavity 116 can flow to the second pressure relief mechanism 115 .

[0105] Each battery cell 121 of the battery cell assembly 120 may be provided with a first pressure relief mechanism 1217, and the support member 130 may be provided with a first discharge port 134 corresponding to each first pressure relief mechanism 1217. For example, the first pressure relief mechanism 1217 and the first discharge port 134 may be provided in a one-to-one correspondence. The first pressure relief mechanism 1217 of each battery cell 121 may be connected to the discharge channel 116 through its corresponding first discharge port 134, so that the discharge of the battery cell 121 from the first pressure relief mechanism 1217 may flow to the discharge channel 116 through the first discharge port 134, and then flow to the second pressure relief mechanism 115.

[0106] Exemplarily, the outer shell 1211 of the battery cell 121 includes a shell 1212 and an end cover 1213, the shell 1212 is provided with an opening, the end cover 1213 is covered on the shell 1212, the end cover 1213 and the shell 1212 cooperate to form an accommodating space, the electrode assembly 1214 is arranged in the accommodating space, and the first pressure relief mechanism 1217 and the electrode terminal 1216 are arranged on the end cover 1213.

[0107] Optionally, the support member 130 may be a bottom guard plate structure of the battery device 100. The support member 130 is disposed on the inner side of the bottom plate 113 of the box body 110 to support the battery cell 121 from the bottom side of the battery cell 121. The battery cell 121 is inverted in the battery box body 110, that is, the end cap 1213, the first pressure relief mechanism 1217 and the electrode terminal 1216 face the bottom plate 113 of the box body 110 of the battery device 100. The support member 130 contacts the end cap 1213 and supports the battery cell 121 through the end cap 1213. A discharge cavity 116 is formed between the support member 130 and the bottom plate 113 of the box body 110. The first pressure relief mechanism 1217 may be disposed on the bottom plate 113 of the battery cell 121, or on one end of the side wall close to the bottom plate 113.

[0108] Each first discharge port 134 is provided with a blocking member 140. Exemplarily, the first discharge ports 134 are provided in one-to-one correspondence with the blocking members 140. Optionally, as an example, the blocking members 140 corresponding to each first discharge port 134 can be provided independently of each other and are respectively provided in the corresponding first discharge port 134. The sealing member 140 of the battery device 100 is configured as follows: when the battery device 100 is in a normal environment and each battery cell 121 is in normal use, each first exhaust port is blocked by the corresponding sealing member 140; when a battery cell 121 in the battery device 100 experiences thermal runaway and the temperature or pressure in the thermally runaway battery cell 121 exceeds a corresponding threshold value, the first pressure relief mechanism 1217 of the thermally runaway battery cell 121 is actuated, and the exhaust flows to the corresponding sealing member 140 through the actuating portion of the first pressure relief mechanism 1217. The sealing member 140 is acted upon by the exhaust of the battery cell 121 to open the first exhaust port 134, and the first exhaust ports 134 corresponding to other battery cells 121 that have not experienced thermal runaway remain blocked by the sealing member 140.

[0109] Exemplarily, the first discharge port 134 is disposed on a side of the support member 130 facing the discharge channel 116 , and the blocking member 140 blocks the side of the support member 130 facing the discharge channel 116 .

[0110] Exemplarily, at least one side of the blocking member 140 facing the discharge channel 116 is configured to be high temperature resistant and corrosion resistant to reduce the possibility that the blocking member 140 is reacted by the discharge in the discharge channel 116 and the corresponding first discharge port 134 is opened.

[0111] The plugging member 140 may be partially or completely embedded in the first discharge port 134. For example, the plugging member 140 may be interference fit with the first discharge port 134 and fixed to the first discharge port 134; for example, the plugging member 140 may also be fixed to the first discharge port 134 by buckling, bonding, pressing, etc.

[0112] Here, "actuation" refers to producing an action or being activated to a certain state. The blocking member 140 is configured to be actuated by the discharge from the corresponding battery cell 121 to the first discharge port 134. It can be understood that the blocking member 140 can produce an action or be activated to a certain state under the action of the discharge, so that the first discharge port 134 has a flow gap, so that the discharge can flow to the discharge channel 116 through the first discharge port 134. Exemplarily, the blocking member 140 produces an action under the action of the discharge, which can be that part of the blocking member 140 moves to form a flow gap under the action of the discharge; or, under the action of the discharge, at least a part of the blocking member 140 is broken, shattered, torn and separated from the first discharge port 134, or the blocking member 140 is separated from the first discharge port 134 as a whole, so that the first discharge port 134 forms a flow gap, etc. For example, the blocking member 140 may open the first discharge port 134 under the effect of the temperature or pressure generated by the emission; the blocking member 140 may also open the first discharge port 134 under the effect of corrosion of the emission.

[0113] It should be noted that, in the present embodiment, the “correspondence” involving the first discharge port 134, the battery cell 121, the first pressure relief mechanism 1217, and the blocking member 140 can refer to the connection relationship between the first pressure relief mechanism 1217 and the first discharge port 134, that is, the first discharge port 134 and the first pressure relief mechanism 1217 connected thereto are in a corresponding relationship, and accordingly, the blocking member 140 provided at the first discharge port 134 and the battery cell 121 provided with the first pressure relief mechanism 1217 are in a corresponding relationship.

[0114] When a battery cell 121 in the battery device 100 of the present embodiment experiences thermal runaway, the first pressure relief mechanism 1217 of the battery cell 121 experiencing thermal runaway is actuated, and the exhaust therein flows to the blocking member 140 through the actuating portion of the first pressure relief mechanism 1217. The blocking member 140 opens the first exhaust port 134 under the action of the exhaust, and the exhaust can flow to the exhaust cavity 116 through the first exhaust port 134, and then to the first pressure relief mechanism 1217, so as to discharge the pressure and exhaust of the battery cell 121 experiencing thermal runaway; the first exhaust port 134 corresponding to the battery cell 121 that has not experienced thermal runaway remains blocked by the blocking member 140, and the blocking member 140 implements isolation protection between the battery cells 121, blocks the flow path of the exhaust from thermal runaway flowing to the battery cell 121 that has not experienced thermal runaway, reduces the possibility of the exhaust in the exhaust cavity 116 flowing to the battery cell 121 that has not experienced thermal runaway, and plays a role in reducing heat diffusion between the battery cells 121.

[0115] According to some embodiments of the present application, optionally, the blocking member 140 is configured to escape from the first discharge port 134 to the discharge cavity 116 under the stamping effect of the discharge discharged from the corresponding battery cell 121 , so as to open the first discharge port 134 .

[0116] The stamping effect of the discharge is the impact and pressure effect caused by the discharge. The stamping effect includes both the direct impact pressure caused by the discharge flowing toward the plugging member 140 and the gas pressure caused by the increase in internal pressure due to the increase in temperature or the increase in fluid substances. The stamping force of the discharge discharged from the battery cell 121 corresponding to the plugging member 140 can be greater than the fixing force between the plugging member 140 and the support member 130, so that the plugging member 140 can be removed from the first discharge port 134 to open the first discharge port 134.

[0117] Exemplarily, the sealing member 140 can be interference fit and tightly plugged in the first discharge port 134. The interference fastening force between the sealing member 140 and the support member 130 is set to be smaller than the stamping force of the discharge discharged from the battery cell 121 corresponding to the sealing member 140. The sealing member 140 can overcome the interference fastening force between the sealing member 140 and the support member 130 under the stamping action of the discharge discharged from the corresponding battery cell 121, and escape outward from the first discharge port 134.

[0118] Exemplarily, the blocking piece 140 can be elastically clamped to the first discharge port 134, and the elastic clamping force between the blocking piece 140 and the support piece 130 is set to be smaller than the stamping force of the discharge discharged from the battery cell 121 corresponding to the blocking piece 140. When the stamping force of the discharge discharged from the corresponding battery cell 121 is greater than the elastic clamping force between the blocking piece 140 and the support piece 130, the blocking piece 140 is disengaged from the first discharge port 134.

[0119] It is understandable that the stamping force of the discharge discharged from the battery cell 121 corresponding to the plugging member 140 can be obtained by performing a thermal runaway test on the battery cell 121. When the plugging member 140 is actually designed, the plugging member 140 that adapts to the tightening force can be obtained through reasonable tests.

[0120] The blocking member 140 of the battery device 100 of this embodiment is configured to be disengaged outward under the stamping action of the exhaust discharged from the corresponding battery cell 121 to open the first exhaust port 134, so that the blocking member 140 corresponding to the battery cell 121 with thermal runaway can open the first exhaust port 134 more smoothly, and the structure is simple and reliable.

[0121] Optionally, when the blocking member 140 is arranged at the first discharge port 134, the blocking member 140 can be arranged to be able to move unidirectionally only from the first discharge port 134 to the discharge channel 116, that is, between the axial ends of the first discharge port 134, the blocking member 140 can only move from the first discharge port 134 to the discharge channel 116 (outward), and when the blocking member 140 moves inward along the first discharge port 134, the movement of the blocking member 140 will be restricted. Exemplarily, when the blocking member 140 moves inward along the first discharge port 134, the resistance that the blocking member 140 needs to overcome is much greater than the force generated by the emissions in the discharge channel 116 (emissions discharged from other battery cells 121 into the discharge channel 116), so as to reduce the possibility that the blocking member 140 is moved by other thermal runaway battery cells 121, thereby opening the first discharge port 134.

[0122] According to some embodiments of the present application, optionally, Figures 4 to 7 As shown, combined with Figures 10 to 12 As shown, Fig.10 This is a schematic diagram of the structure of the blocking member proposed in some embodiments of the present application. Fig.11 A schematic diagram of a blocking member from one perspective provided in some embodiments of the present application, Fig.12 for Fig.11 In the CC cross-sectional view, the blocking member 140 includes a first limiting portion 141, and the first limiting portion 141 cooperates with the support member 130 to limit the blocking member 140 from moving along the first discharge port 134 in a direction away from the discharge channel 116.

[0123] The direction of the first discharge port 134 away from the discharge channel 116 can be understood as the arrangement direction from the first wall 114 to the battery cell assembly 120. Figure 4 The upward arrow in the Z direction can be understood.

[0124] The movement of the blocking member 140 along the first discharge port 134 includes the blocking member 140 moving inward or outward along the axial direction of the first discharge port 134, wherein the blocking member 140 moves outward along the axial direction of the first discharge port 134 (which can be understood with reference to the Z direction) toward the direction where the discharge channel 116 is located (i.e., the direction of the arrow pointing downward in the Z direction), that is, when the blocking member 140 moves along the flow direction of the discharge of the corresponding battery cell 121, the blocking member 140 moves outward; the blocking member 140 moves along the axial direction of the first discharge port 134 in a direction away from the discharge channel 116 (i.e., the direction of the arrow pointing upward in the Z direction), that is, when the blocking member 140 moves in the opposite direction of the flow direction of the discharge of the corresponding battery cell 121, the blocking member 140 moves inward. In this embodiment, the first limiting portion 141 cooperates with the supporting member 130 to limit the blocking member 140 to move inward along the first discharge port 134 , so that the blocking member 140 can only move outward in one direction.

[0125] Exemplarily, the first limiting portion 141 may be a protrusion, and a recessed portion is provided on the peripheral wall of the blocking member 140 surrounding the first discharge port 134, and the protrusion and the recessed portion abut and cooperate from outside to inside in the axial direction of the first discharge port 134 to limit the blocking member 140 from moving inwardly in the first discharge port 134. Optionally, the protrusion may be provided in a circle around the circumference of the blocking member 140 to form a card platform, and the recessed portion may be provided in a circle around the peripheral wall of the first discharge port 134 to form a card platform.

[0126] The blocking member 140 of this embodiment is provided with the first limiting portion 141 to reduce the possibility that the blocking member 140 is moved by other thermal runaway battery cells 121 and the first discharge port 134 is opened, thereby improving the isolation and protection effect of the blocking member 140 on the battery cells 121 and reducing heat diffusion.

[0127] It should be noted that the first limit portion 141 and the support member 130 of this embodiment can also be implemented by other various structures. According to some embodiments of the present application, optionally, in some implementations, such as Figures 4 to 7 As shown, the first discharge port 134 is disposed on a side of the support member 130 facing the discharge channel 116 , and the blocking member 140 includes a first limiting portion 141 , which is pressed against the side of the support member 130 facing the discharge channel 116 .

[0128] The side of the support member 130 facing the discharge channel 116 can be understood as the side of the support member 130 surrounding the discharge channel 116. The first limiting portion 141 is pressed against the side of the support member 130 facing the discharge channel 116, which can be understood as the first limiting portion 141 is pressed against the support member 130 and the first limiting portion 141 is located in the discharge channel 116.

[0129] In this embodiment, the side of the support member 130 facing the discharge channel 116 is pressed against the first limiting portion 141 to limit the blocking member 140 from moving along the first discharge port 134 in a direction away from the discharge channel 116 (refer to the direction of the arrow pointing upward in the Z direction). The structure is simple and the assembly is convenient. The blocking member 140 can be directly arranged on the first discharge port 134 of the existing support member 130 without improving the support member 130. The cost is low and the impact on the structure of the battery device 100 is small.

[0130] According to some embodiments of the present application, optionally, Figure 7 , Figures 10 to 12 As shown, the first limiting portion 141 is disposed around the blocking member 140 and is configured to block an end of the first discharge port 134 facing the discharge channel 116 .

[0131] The first limiting portion 141 may be disposed around the circumference of the blocking member 140 , and may be sealed with the first discharge port 134 .

[0132] Exemplarily, the radial dimension of the first limiting portion 141 is greater than the dimension of the first discharge port 134 , and the first limiting portion 141 covers an end surface of the first discharge port 134 facing the discharge channel 116 to block the first discharge port 134 .

[0133] In this embodiment, the first limiting portion 141 of the sealing member 140 is arranged in a circle, and its supporting and limiting effect is good, which can improve the effect of limiting the movement of the sealing member 140 along the first discharge port 134 in the direction away from the discharge cavity 116 (refer to the upward arrow direction along the Z direction); at the same time, the sealing member 140 can achieve the blocking of any position of the first discharge port 134 in the circumferential direction, and the blocking effect is good, which can reduce the possibility of the discharge in the discharge cavity 116 (the discharge from other battery cells 121 into the discharge cavity 116) flowing back into the first discharge port 134, and improve the isolation and protection effect of the sealing member 140 on each battery cell 121.

[0134] According to some embodiments of the present application, optionally, the first limiting portion 141 is configured to be elastic, and the first limiting portion 141 elastically presses against the side of the support member 130 facing the discharge channel 116 .

[0135] The first limiting portion 141 can be made of elastic materials such as rubber and plastic.

[0136] By setting the first limiting portion 141 to elastically abut against the support member 130, the sealing effect of the first limiting portion 141 on the first discharge port 134 can be improved, and the possibility of the discharge in the discharge channel 116 (the discharge from other battery cells 121 into the discharge channel 116) flowing back into the first discharge port 134 is reduced, thereby improving the isolation and protection effect of the sealing member 140 on each battery cell 121.

[0137] According to some embodiments of the present application, optionally, Figure 7 , Figures 10 to 12 As shown, the first limiting portion 141 is elastically pressed against the support member 130 at least along the radial edge of the blocking member 140 , and the radial edge of the first limiting portion 141 along the blocking member 140 is configured to be warped toward the first discharge port 134 in a natural state.

[0138] Exemplarily, the first limiting portion 141 may be entirely fitted with the end surface of the support member 130 facing the discharge channel 116, and elastically pressed and matched. Exemplarily, the first limiting portion 141 may also be elastically pressed and matched with the end surface of the support member 130 facing the discharge channel 116 only along the radial edge of the blocking member 140. The radial direction of the blocking member 140 is roughly the same as the radial direction of the first discharge port 134, which can be roughly understood by referring to the direction perpendicular to the axial direction of the first discharge port 134 (the axial direction of the first discharge port 134 can be understood by referring to the Z direction) or the direction perpendicular to the flow direction of the discharge in the first discharge port 134.

[0139] The natural state can be understood as a state where the blocking member 140 has not yet been assembled to the first discharge port 134 and is not subject to external forces. It can be understood that the definition of "the first limiting portion 141 at least along the radial edge of the blocking member 140 elastically presses against the support member 130" is a description of the state after the blocking member 140 is assembled to the first discharge port 134.

[0140] Exemplarily, the plugging member 140 includes a main body 143, and the first limiting portion 141 can be arranged around the main body 143. Along the axial direction of the plugging member 140 (roughly consistent with the axial direction of the first discharge port 134), the first limiting portion 141 is arranged at one end of the main body 143. The main body 143 is used to be embedded in or arranged at the first discharge port 134. In a natural state, along the radial direction of the plugging member 140, the first limiting portion 141 gradually warps toward the side where the main body 143 is located along the axial direction of the plugging member 140 from the end connected to the main body 143 to the end away from the main body 143. The first limiting portion 141 can be elastic as a whole. In this way, when the plugging member 140 is blocked at the first discharge port 134, the first limiting portion 141 can be elastically deformed, and elastically pressed and adhered to the support member 130, and the first limiting portion 141 can rely on elastic force to cooperate with the support member 130 to press and seal.

[0141] When the blocking member 140 is assembled to the first discharge port 134, the radial edge of the first limiting portion 141 can be elastically deformed from a natural state toward a direction away from the first discharge port 134 (refer to the direction of the arrow pointing upward in the Z direction), and then pressed against the support member 130. In this way, the radial edge of the first limiting portion 141 has a restoring elastic force toward the first discharge port 134. The restoring elastic force enables the first limiting portion 141 to be elastically pressed against the support member 130 better, thereby improving the sealing effect of the first limiting portion 141 on the first discharge port 134, reducing the possibility of the discharge in the discharge channel 116 (the discharge discharged into the discharge channel 116 by other battery cells 121) flowing back into the first discharge port 134, and improving the isolation and protection effect of the blocking member 140 on each battery cell 121.

[0142] According to some embodiments of the present application, optionally, the blocking member 140 is a heat-resistant member.

[0143] The heat-resistant member refers to a member that can withstand the temperature and corrosion of the discharge of the battery cells 121 , that is, a member that is not easily corroded or melted by the discharge of the battery cells 121 .

[0144] The plugging member 140 is configured as a heat-resistant member. The plugging member 140 can be configured to be disengaged from the first discharge port 134 to the discharge cavity 116 under the stamping effect of the exhaust discharged from the corresponding battery cell 121, so that the first discharge port 134 is opened. The plugging member 140 of this embodiment can open the first discharge port 134 relatively smoothly, and due to the heat resistance of the plugging member 140, the possibility of the exhaust in the discharge cavity 116 (exhaust discharged into the discharge cavity 116 by other battery cells 121) corroding and melting the plugging member 140, thereby opening the first discharge port 134, can be reduced, thereby improving the isolation and protection effect of the plugging member 140 on each battery cell 121.

[0145] According to some embodiments of the present application, optionally, Figure 7 As shown, the blocking member 140 is configured to be snap-fitted or interference-connected to the first discharge port 134 .

[0146] Optionally, the plugging member 140 is configured to be snap-fitted to the first discharge port 134, that is, the plugging member 140 is snap-fitted with the support member 130. Specifically, the plugging member 140 is designed to have a size and shape that matches the first discharge port 134, so that it can be installed to the first discharge port 134. Exemplarily, the edge of the plugging member 140 is designed with a slot or a protrusion, and the slot or the protrusion matches the corresponding protrusion or groove of the peripheral wall of the first discharge port 134 to achieve a snap-fit ​​connection. Exemplarily, the plugging member 140 can also be snap-fitted with the support member 130 through a snap-fit ​​assembly. During actual assembly, the plugging member 140 can be easily inserted into the first discharge port 134 by manual or automated equipment, and snap-fitted and fixed with the peripheral wall of the first discharge port 134.

[0147] Optionally, the plugging member 140 is configured to be interference-connected to the first discharge port 134. Specifically, the diameter of the plugging member 140 is slightly larger than the inner diameter of the first discharge port 134, and a tight connection is achieved through interference fit. During installation, the plugging member 140 can be pressed into the discharge port manually or using a pressure device until it is fully in place and seals the first discharge port 134.

[0148] In the battery device 100 of this embodiment, the plugging member 140 is connected to the first discharge port 134 by means of snap-fit ​​or interference fit, which is not only simple in structure and easy to assemble, but also more solid in structure than by means of bonding such as tape. At the same time, the plugging member 140 is easy to separate from the support member 130 to open the first discharge port 134, which is conducive to timely discharge of emissions generated by thermal runaway, so as to reduce the risk caused by thermal runaway.

[0149] According to some embodiments of the present application, optionally, the blocking member 140 is at least partially configured to be elastic, and the blocking member 140 and the support member 130 are elastically pressed against each other so that the blocking member 140 is snap-fitted or interference-connected to the first discharge port 134 .

[0150] The blocking member 140 may be partially or entirely elastic, and the elastic portion thereof may be made of an elastic material.

[0151] Exemplarily, the blocking member 140 may be provided with a gasket made of rubber or plastic, or the blocking member 140 may be partially made of rubber, plastic or other materials, and the elastic portion of the blocking member 140 may be pressed against the inner wall surface of the peripheral wall of the support member 130 surrounding the first discharge port 134 to achieve interference connection between the blocking member 140 and the support member 130.

[0152] Exemplarily, the blocking member 140 is provided with an elastic protrusion, and the inner wall surface of the peripheral wall of the support member 130 around the first discharge port 134 is provided with a groove, and the elastic protrusion of the blocking member 140 is clamped in the groove to enable the blocking member 140 to be clamped and connected with the support member 130.

[0153] In this embodiment, the blocking member 140 is at least partially configured to have elasticity, which facilitates the assembly of the blocking member 140 to the first discharge port 134, and the blocking member 140 is fixed by elasticity, and can undergo elastic deformation to facilitate the separation of the blocking member 140 from the support member 130 to open the first discharge port 134, which is beneficial to the timely discharge of emissions generated by thermal runaway, so as to reduce the risk caused by thermal runaway.

[0154] According to some embodiments of the present application, optionally, Figure 7 , Figures 10 to 12 As shown, the blocking member 140 includes a second limiting portion 142, which is pressed against the end surface of the peripheral wall surrounding the first discharge port 134 facing the battery cell 121. The second limiting portion 142 is configured to be elastic. The second limiting portion 142 is configured to be able to deform under the impact of the discharge discharged from the corresponding battery cell 121 so as to escape from the first discharge port 134 to the discharge cavity 116.

[0155] Among them, the end surface of the surrounding wall surrounding the first discharge port 134 facing the battery cell 121 can be understood as the end surface of the surrounding wall of the first discharge port 134 facing away from the discharge channel 116. Exemplarily, the support member 130 includes a first plate body 131, and the first discharge port 134 is arranged on the first plate body 131. The end surface of the first plate body 131 facing the battery cell 121 is the end surface of the surrounding wall surrounding the first discharge port 134 facing the battery cell 121, and the end surface of the first plate body 131 facing away from the battery cell 121 is the end surface of the surrounding wall surrounding the first discharge port 134 facing the discharge channel 116.

[0156] In a normal state, the elastic property of the second limiting portion 142 enables it to be tightly pressed against the end surface of the peripheral wall of the first discharge port 134 facing the battery cell 121 .

[0157] In the natural state, the radial dimension of the second limiting portion 142 is greater than the radial dimension of the first discharge port 134, and the elastic deformation of the second limiting portion 142 enables it to enter the first discharge port 134. When the blocking member 140 is assembled to the first discharge port 134, the second limiting portion 142 is squeezed and deformed manually or by mechanical tools, and inserted into the first discharge port 134, and then the blocking member 140 is pushed to move the second limiting portion 142 to the end surface of the first discharge port 134 facing the battery cell 121. At this time, the second limiting portion 142 is released and restored to the natural state. At this time, the second limiting portion 142 is pressed against the end surface of the first discharge port 134 facing the battery cell 121. When the discharge discharged from the battery cell 121 impacts the corresponding blocking member 140, the second limiting portion 142 is squeezed and deformed under the impact of the discharge and enters the first discharge port 134. Further, under the impact of the discharge, the second limiting portion 142 and the blocking member 140 can be separated from the first discharge port 134 as a whole.

[0158] The second limiting portion 142 of the plugging member 140 of this embodiment is set to be elastic, which facilitates the assembly of the plugging member 140 to the first discharge port 134, and the second limiting portion 142 can be elastically deformed, so as to facilitate the separation of the plugging member 140 from the support member 130 and open the first discharge port 134, which is conducive to timely discharge of emissions generated by thermal runaway to reduce the risk of thermal runaway. At the same time, the plugging member 140 relies on the elastic second limiting portion 142 to press against the end face of the discharge port facing the battery cell 121, and the fixing stability of the plugging member 140 is relatively high, which reduces the possibility of the plugging member 140 being separated from the first discharge port 134 when the battery device 100 vibrates, etc., and improves the protective performance of the plugging member 140.

[0159] According to some embodiments of the present application, optionally, the second limiting portion 142 is disposed around the blocking member 140 , and the second limiting portion 142 blocks an end of the first discharge port 134 away from the discharge channel 116 .

[0160] The second limiting portion 142 may be disposed around the circumference of the blocking member 140 , and may be sealed with the first discharge port 134 .

[0161] Exemplarily, the radial dimension of the second limiting portion 142 is greater than the dimension of the first discharge port 134 , and the second limiting portion 142 covers the end surface of the first discharge port 134 facing one end of the battery cell 121 to block the first discharge port 134 .

[0162] In this embodiment, the second limiting portion 142 of the blocking member 140 is arranged in a circle, and its supporting and limiting effect is good, which can improve the setting stability of the blocking member 140 in the first discharge port 134, reduce the possibility of the blocking member 140 being separated from the first discharge port 134 when the battery device 100 vibrates, etc., and improve the protection performance of the blocking member 140; at the same time, the blocking member 140 can achieve blocking of any position of the first discharge port 134 in the circumferential direction through the second limiting portion 142, and the blocking effect is good, which can reduce the possibility of the discharge in the discharge channel 116 (the discharge from other battery cells 121 into the discharge channel 116) flowing back into the first discharge port 134, and improve the isolation and protection effect of the blocking member 140 on each battery cell 121.

[0163] According to some embodiments of the present application, optionally, Figure 7 , Figures 10 to 12 As shown, the second limiting portion 142 includes a first guiding sub-portion 1421, which is arranged at one end of the second limiting portion 142 toward the battery cell 121, and the first guiding sub-portion 1421 is gradually expanded along the direction of the battery cell assembly 120 toward the first wall 114; and / or, the second limiting portion 142 includes a second guiding sub-portion 1422, which is arranged at one end of the second limiting portion 142 toward the first wall 114, and the second guiding sub-portion 1422 is gradually contracted along the direction of the battery cell assembly 120 toward the first wall 114.

[0164] The direction of the battery cell assembly 120 toward the first wall 114 can be understood by referring to the arrangement direction from the battery cell assembly 120 to the first wall 114. Figure 4 and Figure 7 The arrow direction is downward along the Z direction.

[0165] Exemplarily, the second limiting portion 142 includes a first guiding sub-portion 1421 and a second guiding sub-portion 1422, and the first guiding sub-portion 1421 and the second guiding sub-portion 1422 are arranged and connected in sequence along the direction of the battery cell assembly 120 toward the first wall 114, and the first guiding surface is the outer peripheral surface of the first guiding sub-portion 1421, and the second guiding surface is the outer peripheral surface of the second guiding sub-portion 1422.

[0166] Optionally, the first guide sub-portion 1421 is gradually expanded from one end of the first guide sub-portion 1421 toward the battery cell 121 to one end toward the discharge channel 116 (the end toward the discharge channel 116 is also the end toward the first wall 114), so that the first guide surface is gradually inclined away from the axis of the second limit portion 142. In the process of assembling the plugging member 140 to the first discharge port 134, the plugging member 140 can be assembled from the side of the support member 130 toward the first wall 114. The first end of the first guide sub-portion 1421 that enters the first discharge port 134 first is the small end, and the first end that enters the first discharge port 134 later is the large end. The first guide surface of the first guide sub-portion 1421 can play a good guiding role, thereby improving the convenience of assembling the plugging member 140.

[0167] Optionally, the second guide sub-portion 1422 is gradually set from the end of the first guide sub-portion 1421 facing the battery cell 121 to the end facing the discharge channel 116 (the end facing the discharge channel 116 is also the end facing the first wall 114), so that the second guide surface is gradually inclined close to the axis of the second limiting portion 142. The second guide surface can be used to abut against the end surface of the first discharge port 134 facing the battery cell assembly 120. The second guide surface is set to be larger inside and smaller outside. When the blocking member 140 is separated from the first discharge port 134, the second guide surface can play a guiding role, so that the blocking member 140 can be easily separated from the first discharge port 134, so that the first discharge port 134 can be opened smoothly.

[0168] By providing the first guide sub-portion 1421 , the blocking member 140 can be assembled to the first discharge port 134 more conveniently; by providing the second guide sub-portion 1422 , the blocking member 140 can be easily removed from the first discharge port 134 , so that the battery device 100 can release pressure in time.

[0169] According to some embodiments of the present application, optionally, Figure 7 , Figures 10 to 12 As shown, the second limiting portion 142 is at least partially arranged around the circumference of the blocking member 140 in a hollow ring shape.

[0170] Illustratively, along the axial direction of the blocking member 140 , the second limiting portion 142 may be configured to protrude from the main body portion 143 , and the second limiting portion 142 is configured to be a hollow annular structure around the circumference of the main body portion 143 .

[0171] The second limiting portion 142 is at least partially provided with a hollow annular structure. When the second limiting portion 142 is squeezed in the radial direction, the second limiting portion 142 is easily compressed and deformed, which is conducive to improving the convenience of assembling the second limiting portion 142, and can also make the blocking member 140 more easily escape from the first discharge port 134 after being impacted. In addition, the hollow portion of the second limiting portion 142 can face the first pressure relief mechanism 1217 and communicate with the first pressure relief mechanism 1217. The discharge discharged by the first pressure relief mechanism 1217 can concentrate on the hollow portion of the second limiting portion 142, so that the middle portion of the second limiting portion 142 is concave and the circumferential edge is deformed radially inward, thereby improving the ability of the blocking member 140 to escape from the first discharge port 134 under the action of the discharge.

[0172] According to some embodiments of the present application, optionally, Figure 7 , Figures 10 to 12 As shown, the blocking member 140 also includes a first limiting portion 141, a connecting portion 144 and a main body portion 143. The main body portion 143 is arranged at the first discharge port 134. The connecting portion 144 is arranged around the main body portion 143 and is arranged at the first discharge port 134. The connecting portion 144 and the main body portion 143 are spaced apart. The second limiting portion 142 is connected to one end of the main body portion 143 facing the battery cell assembly 120 and one end of the connecting portion 144 facing the battery cell assembly 120. The first limiting portion 141 abuts against the side of the support member 130 facing the discharge channel 116. The first limiting portion 141 and the second limiting portion 142 are connected via the connecting portion 144.

[0173] The second limiting portion 142 is connected between one end of the main body 143 facing the battery cell assembly 120 and one end of the connecting portion 144 facing the battery cell assembly 120. Exemplarily, the second limiting portion 142 is arranged in a ring shape, the inner periphery of the second limiting portion 142 is connected to the end of the main body 143 facing the battery cell assembly 120, and the outer periphery of the second limiting portion 142 is connected to the end of the connecting portion 144 facing the battery cell assembly 120.

[0174] One end of the connecting portion 144 facing the first wall 114 is connected to the first limiting portion 141. The first limiting portion 141 is connected to the second limiting portion 142 through the connecting portion 144. The action applied to the first limiting portion 141 can cause the second limiting portion 142 to deform, thereby improving the convenience of assembly operation of the blocking member 140. At the same time, the connecting portion 144 and the main body 143 are arranged at intervals, so that there is a movable gap between the connecting portion 144 and the main body 143, so that the first limiting portion 141 can drive the connecting portion 144 to move toward the main body 143, so that the second limiting portion 142 connected to the connecting portion 144 is compressed in the radial direction, further improving the convenience of assembly operation of the blocking member 140.

[0175] According to some embodiments of the present application, optionally, the blocking member 140 is configured as a rubber plug of an integral structure.

[0176] The rubber plug is a plug structure made of elastic plastic, rubber, silicone and other polymer materials. Exemplarily, the rubber plug can be a high temperature resistant and corrosion resistant plastic plug.

[0177] According to some embodiments of the present application, optionally, Figures 4 to 9 As shown, the support member 130 is further provided with a second discharge port 135 corresponding to each first discharge port 134, a connecting cavity 136 is provided in the support member 130, the first discharge port 134 is provided on the side of the support member 130 facing the discharge cavity 116, the second discharge port 135 is provided on the side of the support member 130 facing the battery cell assembly 120, the second discharge port 135 is connected with the corresponding first discharge port 134 through the connecting cavity 136, and the first pressure relief mechanism 1217 is provided toward the second discharge port 135.

[0178] The first discharge port 134 is connected to the corresponding second discharge port 135 through a connecting channel 136. One connecting channel 136 can be used to connect multiple pairs of first discharge ports 134 and second discharge ports 135, or each first discharge port 134 is connected to the corresponding second discharge port 135 through independent connecting channels 136. Exemplarily, the first discharge port 134 and the second discharge port 135 are arranged opposite to each other. Optionally, the first discharge port 134 and the second discharge port 135 can be arranged one-to-one.

[0179] The sealing member 140 of the battery device 100 is sealed on a side of the support member 130 close to the discharge channel 116, and the first pressure relief mechanism 1217 is arranged on a side of the support member 130 close to the battery cell assembly 120. When emissions from other battery cells 121 flow into the discharge channel 116, even if a small amount of emissions penetrates the sealing member 140 and enters the first discharge port 134, since the first pressure relief mechanism 1217 is far away from the sealing member 140, the impact of these emissions on the first pressure relief mechanism 1217 of the battery cell 121 that is not in thermal runaway can also be reduced.

[0180] According to some embodiments of the present application, optionally, Figures 4 to 9As shown, the support member 130 includes a first plate body 131, a second plate body 132 and a support beam 133. The support beam 133 is arranged between the first plate body 131 and the second plate body 132 and connects the first plate body 131 and the second plate body 132. The support beam 133, the first plate body 131 and the second plate body 132 are surrounded to form a connecting cavity 136. The second plate body 132 is arranged on the side of the first plate body 131 facing the battery cell assembly 120. A discharge cavity 116 is formed between the first plate body 131 and the first wall 114. The first discharge port 134 is arranged on the first plate body 131, and the second discharge port 135 is arranged on the second plate body 132.

[0181] The first plate 131, the support beam 133 and the second plate 132 are arranged in sequence along the arrangement direction of the battery cell assembly 120 to the first wall 114 (refer to the arrow direction pointing downward in the Z direction), the first plate 131 is arranged close to the battery cell assembly 120, and the second plate 132 is arranged close to the first wall 114. Exemplarily, a plurality of support beams 133 may be arranged between the first plate 131 and the second plate 132, and each support beam 133 may be arranged at intervals along the first direction, and adjacent support beams 133 cooperate with the first plate 131 and the second body to form a connecting channel 136. The first direction X is perpendicular to the arrangement direction of the battery cell assembly 120 to the first wall 114.

[0182] Exemplarily, the first plate 131 , the second plate 132 , and the first wall 114 may be arranged substantially in parallel, and the first plate 131 and the second plate 132 are both substantially perpendicular to the arrangement direction from the battery cell assembly 120 to the first wall 114 .

[0183] Optionally, the first plate body 131, the support beam 133 and the third plate body may be integrally formed or connected into an integral structure.

[0184] The first discharge port 134 passes through two opposite sides of the first plate 131 , and the second discharge port 135 passes through two opposite sides of the second plate 132 .

[0185] Exemplarily, along the first direction X, the support beam 133 is located between the first pressure relief mechanisms 1217 of two adjacent battery cells 121, and the support beam 133 extends along the second direction Y, which is perpendicular to the first direction X and perpendicular to the arrangement direction of the battery cell assembly 120 to the first wall 114 (refer to the arrow direction pointing downward along the Z direction). Optionally, the support beam 133 is provided with a through hole 137 that passes through both ends of the second direction Y. The through hole 137 can reduce the weight of the support member 130, thereby reducing the weight of the entire battery device 100, and can make the support beam 133 have a better buffering effect.

[0186] Exemplarily, the first discharge port 134 is disposed on the first plate 131 at a position that avoids the position of the support beam 133 .

[0187] Exemplarily, the second discharge port 135 is disposed on the second plate 132 at a position that avoids the position of the support beam 133 .

[0188] Exemplarily, the first plate 131 and the second body may be connected to a wall of the box body 110 adjacent to the first wall 114 .

[0189] The support member 130 has a simple structure and is easy to assemble by setting a first plate body 131, a support beam 133 and a second plate body 132. The support beam 133 is set between the first plate body 131 and the second plate body 132, so that there is a gap between the first plate body 131 and the second plate body 132, which can improve the buffering and protective effect of the support member 130 on the battery cell assembly 120.

[0190] According to some embodiments of the present application, the battery device 100 may further include an insulating member 150. Figure 7 , Figure 8 As shown, the insulating member 150 is disposed between the support member 130 and the battery cell 121 , covers the first pressure relief mechanism 1217 , and blocks the second discharge port 135 , and is configured to be actuated under the action of the discharge to open the second discharge port 135 .

[0191] The actuation of the insulating member 150 means that the insulating member 150 moves or is activated to a certain state, so that the second discharge port 135 is opened. The action of the insulating member 150 may include but is not limited to: the components in the insulating member 150 move to form the discharge channel 116, at least a part of the insulating member 150 is broken, shattered, torn or opened, etc. When the insulating member 150 is actuated, the discharge of the battery cell 121 can flow from the actuated part of the insulating member 150 into the second discharge port 135, and then be discharged to the outside through the first discharge port 134 and the discharge channel 116.

[0192] The insulating member 150 refers to a component that can form electrical isolation when the battery device 100 is in a normal use environment, and is a component that can prevent current or voltage from flowing from one conductor to another conductor.

[0193] Exemplarily, the insulating member 150 is at least partially made of insulating material, and the insulating material includes plastic, rubber, glass, ceramic, mica, paper, wood, etc.

[0194] The insulating member 150 is disposed between the support member 130 and the battery cell 121, which can reduce the possibility of electrical conduction between the battery cell 121 and the support member 130, thereby causing a short circuit in the battery cell 121, thereby improving the performance of the battery device 100. In addition, the insulating member 150 can block the second discharge port 135, thereby protecting and isolating the emissions from the battery cell 121 in thermal runaway, reducing the possibility of emissions flowing to the battery cell 121 that is not in thermal runaway, and reducing heat diffusion.

[0195] According to some embodiments of the present application, optionally, referring to Figure 4 , Figure 7 , Figure 8 As shown, combined with Fig.13 As shown, Fig.13 for Figure 7 The partially enlarged view shows that the insulating member 150 includes a first insulating portion 151 and a second insulating portion 152 that are connected to each other. The second insulating portion 152 is covered by the first pressure relief mechanism 1217 and is at least partially disposed on the second discharge port 135. The first insulating portion 151 is disposed around the second insulating portion 152, and the first insulating portion 151 is pressed between the battery cell 121 and the support member 130.

[0196] For example, the multiple battery cells 121 of the battery cell assembly 120 can be arranged in a row, and the insulating members 150 corresponding to the multiple battery cells 121 in the same row can be arranged as one body, specifically, the first insulating parts 151 of adjacent insulating members 150 are connected to each other as one body. The insulating member 150 of the one-piece structure can play a better insulating role between the battery cell assembly 120 and the support member 130.

[0197] Exemplarily, the insulating parts 150 corresponding to the multiple battery cells 121 in the same row can be configured as a whole, and a stop portion 153 is further provided on the side of the insulating part 150. The stop portion 153 can be insulated. The stop portion 153 and the insulating part 150 form a groove structure. The first pressure relief mechanism 1217 of the battery cell assembly 120 can be arranged in the groove structure. The stop portion 153 can stop and position the first pressure relief mechanism 1217, which can reduce the heat diffusion between the battery cell assemblies 120.

[0198] Exemplarily, the first insulating portion 151 is substantially parallel to the end surface of the battery cell 121 facing the first wall 114 and abuts against the end surface of the battery cell 121. The second insulating portion 152 is recessed relative to the first insulating portion 151 toward the first wall 114 and is at least partially recessed into the second discharge port 135. The second insulating portion 152 covers the first pressure relief mechanism 1217.

[0199] The insulating member 150 is pressed and fixed between the battery cell 121 and the support member 130 by the first insulating portion 151 , and has a simple structure and good insulation effect.

[0200] According to some embodiments of the present application, optionally, Figure 7 and Fig.13 As shown, the second insulating part 152 includes a main body 1521 and a heat-resistant part 1522. The main body 1521 is covered with the first pressure relief mechanism 1217 and connected to the first insulating part 151, the heat-resistant part 1522 is arranged on the side of the main body 1521 away from the first pressure relief mechanism 1217, and the heat-resistant part 1522 is arranged at the second discharge port 135, and the main body 1521 is arranged to be destroyed under the action of the discharge, and the heat-resistant part 1522 is carried away from the second discharge port 135.

[0201] The heat-resistant portion 1522 refers to a member that can withstand the temperature and corrosion of the discharge of the battery cells 121 , that is, a member that is not easily corroded or melted by the discharge of the battery cells 121 .

[0202] The main body 1521 and the first insulating part 151 may be made of the same material. The main body 1521 may be configured to be destroyed by the impact of the discharge, or by the high temperature melting or material corrosion of the discharge.

[0203] The main body 1521 is arranged on the side facing the first pressure relief mechanism 1217, and can be destroyed by emissions, so that when the battery cell 121 corresponding to the first pressure relief mechanism 1217 has thermal runaway, the emissions can be discharged in time; the heat-resistant portion 1522 is arranged on the side away from the main body 143 and away from the first pressure relief mechanism 1217. When the emissions generated by the thermal runaway of other battery cells 121 flow to the heat-resistant portion 1522, the heat-resistant portion 1522 is not easily destroyed, and can play a better isolation and protection role for the battery cell 121 corresponding to the insulating part 150, thereby reducing the possibility that the emissions of other battery cells 121 affect the current battery cell 121.

[0204] According to some embodiments of the present application, optionally, the heat-resistant part 1522 is a mica sheet, and the main body part 1521 and / or the first insulating part 151 are a plastic sheet.

[0205] The main body 1521 and the first insulating part 151 may be made of the same plastic material or different plastic materials. The plastic material of the main body 1521 is configured to be broken, corroded or melted by the discharge of the battery cell 121 .

[0206] Exemplarily, the main body 1521 and the first insulating portion 151 are an integral structure and are configured as plastic sheets of the same material.

[0207] For example, the heat-resistant portion 1522 may be adhered to the body portion 143 by gluing.

[0208] The heat-resistant part 1522 is configured as a mica sheet, which has good high temperature resistance, corrosion resistance and insulation effect. The main body 1521 or the first insulating part 151 is configured as plastic, which can have good insulation effect, is easy to process and has low cost.

[0209] According to some embodiments of the present application, optionally, the first wall 114 is disposed on the bottom plate 113 of the box body 110 .

[0210] That is, the bottom plate 113 of the box body 110 is the first wall 114, and the first pressure relief mechanisms 1217 of the battery cells 121 are all arranged toward the bottom plate 113 of the box body 110, forming a bottom spray type thermal runaway protection structure.

[0211] The battery device 100 used in a mobile tool such as a vehicle 1000 has a support member 130 disposed on the bottom plate 113 of the box body 110, which can improve the buffering effect on the battery cells 121. The blocking member 140 is disposed on the support member 130, which can provide a better isolation and protection effect between the bottom-sprayed battery cells 121, thereby reducing the possibility of thermal runaway diffusion.

[0212] like Figures 2 to 13 As shown, this embodiment provides a battery device 100, including a box body 110, a battery cell assembly 120, a support member 130, an insulating member 150, and a blocking member 140. The bottom plate 113 of the box body 110 forms a first wall 114, and the battery cell assembly 120 is disposed in the box body 110. The battery cell assembly 120 includes a plurality of battery cells 121. The battery cells 121 have a first pressure relief mechanism 1217. The first pressure relief mechanism 1217 is disposed toward the first wall 114 and is used to discharge the discharge in the battery cells 121. The support member 130 includes a first plate 131, a second plate 132 and a support beam 133. The second plate 132 is disposed on a side of the first plate 131 facing the battery cell assembly 120. The support beam 133 is disposed between the first plate 131 and the second plate 132 and connects the first plate 131 and the second plate 132. The support beam 133, the first plate 131 and the second plate 132 are surrounded to form a connecting cavity 136. The second plate 132 is disposed corresponding to each first pressure relief mechanism 1217. There are second discharge ports 135 that are independent of each other, the first pressure relief mechanism 1217 is arranged toward the corresponding second discharge port 135, the first plate body 131 is provided with a first discharge port 134, the first discharge port 134 corresponds to the second discharge port 135 one by one and is arranged opposite to each other, the second discharge port 135 is connected with the corresponding first discharge port 134 through a connecting channel 136, a discharge channel 116 is formed between the first plate body 131 and the first wall 114, and the first discharge port 134 is connected with the discharge channel 116.

[0213] The insulating member 150 is disposed between the support member 130 and the battery cell 121. The insulating member 150 includes a first insulating portion 151 and a second insulating portion 152 connected to each other. The first insulating portion 151 is disposed around the second insulating portion 152. The first insulating portion 151 is pressed between the battery cell 121 and the support member 130. The second insulating portion 152 includes a main body 1521 and a heat-resistant portion 1522. The main body 1521 is connected to the first insulating portion 151. The main body 1521 is covered by the first pressure relief mechanism 1217. The heat-resistant portion 1522 is disposed on a side of the main body 1521 away from the first pressure relief mechanism 1217. The heat-resistant portion 1522 is disposed at the second discharge port 135. The main body 1521 is configured to be destroyed under the action of the discharge and carry the heat-resistant portion 1522 away from the second discharge port 135. The heat-resistant portion 1522 is a mica sheet, and the main body 1521 and the first insulating portion 151 are heat-corrosive plastic sheets.

[0214] The plurality of first discharge ports 134 are respectively provided with a blocking member 140 , which is at least partially disposed in the corresponding first discharge port 134 . The blocking member 140 is configured to block the corresponding first discharge port 134 , and can open the first discharge port 134 under the effect of discharge flowing from the corresponding battery cell 121 to the first discharge port 134 .

[0215] The blocking member 140 includes a first limiting portion 141, a second limiting portion 142, a connecting portion 144 and a main body 143. The main body 143 is arranged at the first discharge port 134. The connecting portion 144 is arranged around the main body 143 and is arranged at the first discharge port 134. The connecting portion 144 and the main body 143 are arranged at intervals. The second limiting portion 142 is connected to one end of the main body 143 facing the battery cell assembly 120 and the connecting portion 144 is connected to one end of the battery cell assembly 120. The first limiting portion 141 abuts against the side of the first plate 131 facing the discharge channel 116. The first limiting portion 141 and the second limiting portion 142 are connected through the connecting portion 144. The blocking member 140 includes a first limiting portion 141, which is pressed against the side of the first plate 131 facing the discharge channel 116 to limit the blocking member 140 from moving along the first discharge port 134 in a direction away from the discharge channel 116 (refer to the direction of the arrow pointing upward in the Z direction). The first limiting portion 141 is arranged around the main body 1521, and the first limiting portion 141 is arranged to have elasticity. The first limiting portion 141 is elastically pressed against the first plate 131 at least along the radial edge of the blocking member 140 to block one end of the first discharge port 134 facing the discharge channel 116. The radial edge of the first limiting portion 141 along the blocking member 140 is arranged to be warped toward the first discharge port 134 in a natural state. The plugging member 140 may be a heat-resistant rubber plug of an integral structure. The plugging member 140 is configured to be released from the first discharge port 134 to the discharge channel 116 under the stamping action of the discharge discharged from the corresponding battery cell 121, so as to open the first discharge port 134. The plugging member 140 is configured to be clamped to the first discharge port 134 through a second limiting portion 142. The second limiting portion 142 is pressed against the side of the first plate body 131 facing the second plate body 132. The second limiting portion 142 is configured to be elastic. The second limiting portion 142 is configured to be deformed under the impact of the discharge discharged from the corresponding battery cell 121, so as to be released from the first discharge port 134 to the discharge channel 116. The second limiting portion 142 is arranged around the blocking member 140, and the second limiting portion 142 blocks the end of the first discharge port 134 away from the discharge channel 116. The second limiting portion 142 includes a first guide sub-portion 1421, which is arranged at the end of the second limiting portion 142 facing the battery cell 121, and is gradually expanded along the direction of the battery cell assembly 120 toward the first wall 114 (refer to the arrow direction downward along the Z direction); the second limiting portion 142 includes a second guide sub-portion 1422, which is arranged at the end of the second limiting portion 142 facing the first wall 114, and is gradually contracted along the direction of the battery cell assembly 120 toward the first wall 114. The second limiting portion 142 is at least partially arranged in a hollow ring shape around the circumference of the blocking member 140, and the opening of the hollow ring faces the first pressure relief mechanism 1217.

[0216] Exemplarily, the radial dimension of the first limiting portion 141 is greater than the radial dimension of the second limiting portion 142. The first limiting portion 141 has a larger radial dimension, which can improve the limiting effect, reduce the possibility of the blocking member 140 moving away from the discharge channel 116 along the first discharge port 134, and improve the isolation and protection effect of the blocking member 140; the radial dimension of the second limiting portion 142 can be set slightly smaller on the premise of stopping and fixing the blocking member 140, so that the force required for the second limiting portion 142 to separate from the first discharge port 134 can be reduced, so that the second limiting portion 142 can be separated from the first discharge port 134 in time under the action of the discharge of the corresponding battery cell 121, thereby improving the timeliness of the discharge of the discharge.

[0217] An embodiment of the present application further provides an electrical device, comprising the battery device 100 proposed in the present application or any embodiment of the present application, wherein the battery device 100 is used to store or provide electrical energy.

[0218] The electrical equipment may be any of the electrical systems or devices mentioned above.

[0219] The electric device of this embodiment has the beneficial effects of the battery device 100 proposed in this application or any embodiment of this application.

[0220] If not otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution. The above description of each embodiment tends to emphasize the differences between the embodiments, and the same or similar aspects can be referenced to each other. For the sake of brevity, this article will not repeat them.

[0221] 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 device, characterized in that: include: A box body having a first wall; A battery cell assembly is disposed in the box, the battery cell assembly includes a plurality of battery cells, the battery cells have a first pressure relief mechanism, the first pressure relief mechanism is disposed toward the first wall and is used to discharge emissions in the battery cells; a support member disposed between the battery monomer assembly and the first wall, and a discharge cavity is disposed between the support member and the first wall, the support member is provided with mutually independent first discharge ports corresponding to each of the first pressure relief mechanisms, and each of the first pressure relief mechanisms is connected to the discharge cavity through the corresponding first discharge port; A blocking member is provided for each of the plurality of first discharge ports, the blocking member is at least partially disposed in the corresponding first discharge port, the blocking member is configured to block the corresponding first discharge port, and the blocking member is configured to be actuated by the discharge from the corresponding battery cell to the first discharge port to open the first discharge port.

2. The battery device according to claim 1, characterized in that: The blocking member is configured to be released from the first discharge port to the discharge cavity under the stamping action of the discharge discharged from the corresponding battery cell, so that the first discharge port is opened.

3. The battery device according to claim 2, characterized in that: The blocking member includes a first limiting portion, and the first limiting portion cooperates with the supporting member to limit the blocking member from moving along the first discharge port in a direction away from the discharge channel.

4. The battery device according to claim 3, characterized in that: The first discharge port is disposed on a side of the support member facing the discharge cavity, and the first limiting portion is pressed against a side surface of the support member facing the discharge cavity.

5. The battery device according to claim 4, characterized in that: The first limiting portion is disposed around the blocking member and is configured to block an end of the first discharge port toward the discharge cavity.

6. The battery device according to claim 4, characterized in that: The first limiting portion is configured to be elastic, and the first limiting portion elastically presses against a side surface of the support member facing the discharge cavity.

7. The battery device according to claim 6, characterized in that: At least the radial edge of the first limiting portion along the blocking member is elastically pressed against the supporting member, and the radial edge of the first limiting portion along the blocking member is configured to be warped toward the first discharge port in a natural state.

8. The battery device according to claim 2, characterized in that: The blocking member is a heat-resistant member.

9. The battery device according to any one of claims 1 to 8, characterized in that: The blocking member is configured to be snap-fitted or interference-connected to the first discharge port.

10. The battery device according to claim 9, characterized in that: The blocking member is at least partially configured to be elastic, and the blocking member is elastically pressed and matched with the supporting member so that the blocking member is snap-fitted or interference-connected to the first discharge port.

11. The battery device according to claim 10, characterized in that: The blocking member includes a second limiting portion, which is pressed against an end surface of a peripheral wall surrounding the first discharge port facing the battery cell, and the second limiting portion is configured to be elastic. The second limiting portion is configured to be deformed under the impact of the discharge discharged from the corresponding battery cell so as to escape from the first discharge port to the discharge cavity.

12. The battery device according to claim 11, characterized in that: The second limiting portion is disposed around the blocking member, and the second limiting portion blocks an end of the first discharge port away from the discharge cavity.

13. The battery device according to claim 11, characterized in that: The second limiting portion includes a first guiding sub-portion, the first guiding sub-portion is arranged at one end of the second limiting portion facing the battery cell, and the first guiding sub-portion is gradually expanded along the direction of the battery cell assembly toward the first wall; And / or, the second limiting portion includes a second guiding sub-portion, the second guiding sub-portion is arranged at one end of the second limiting portion facing the first wall, and the second guiding sub-portion is gradually tapered along the direction of the battery cell assembly toward the first wall.

14. The battery device according to claim 11, characterized in that: The second limiting portion is at least partially arranged in a hollow ring shape around the circumference of the blocking member.

15. The battery device according to claim 11, characterized in that: The blocking member also includes a first limiting portion, a connecting portion and a main body portion, the main body portion is arranged at the first discharge port, the connecting portion is arranged around the main body portion and is arranged at the first discharge port, the connecting portion and the main body portion are spaced apart, the second limiting portion is connected to one end of the main body portion facing the battery monomer assembly and one end of the connecting portion facing the battery monomer assembly, the first limiting portion abuts against the side of the support member facing the discharge cavity, and the first limiting portion and the second limiting portion are connected via the connecting portion.

16. The battery device according to any one of claims 1 to 8, characterized in that: The blocking piece is configured as a rubber plug of an integral structure.

17. The battery device according to any one of claims 1 to 3 and 8, characterized in that: The support member is further provided with a second discharge port corresponding to each of the first discharge ports, a connecting cavity is provided in the support member, the first discharge port is provided on a side of the support member facing the discharge cavity, the second discharge port is provided on a side of the support member facing the battery cell assembly, the second discharge port is connected with the corresponding first discharge port through the connecting cavity, and the first pressure relief mechanism is provided toward the second discharge port.

18. The battery device according to claim 17, characterized in that: The support member includes a first plate body, a second plate body and a support beam, the second plate body is arranged on a side of the first plate body facing the battery cell assembly, the support beam is arranged between the first plate body and the second plate body and connects the first plate body and the second plate body, the support beam, the first plate body and the second plate body are arranged to form the connecting cavity, the discharge cavity is formed between the first plate body and the first wall, the first discharge port is arranged on the first plate body, and the second discharge port is arranged on the second plate body.

19. The battery device according to claim 17, characterized in that: The battery device further includes an insulating member, which is disposed between the support member and the battery cell, covers the first pressure relief mechanism and blocks the second discharge port, and is configured to be actuated under the action of the discharge to open the second discharge port.

20. The battery device according to claim 19, characterized in that The insulating member includes a first insulating portion and a second insulating portion connected to each other, the second insulating portion covers the first pressure relief mechanism and is at least partially disposed at the second discharge port, the first insulating portion surrounds the second insulating portion, and the first insulating portion is pressed between the battery cell and the support member.

21. The battery device according to claim 20, characterized in that The second insulating part includes a main body and a heat-resistant part. The main body is covered on the first pressure relief mechanism and connected to the first insulating part. The heat-resistant part is arranged on the side of the main body away from the first pressure relief mechanism, and the heat-resistant part is arranged at the second discharge port. The main body is arranged to be destroyed under the action of the discharge and carry the heat-resistant part away from the second discharge port.

22. The battery device according to claim 21, characterized in that The heat-resistant part is a mica sheet, and the main body and / or the first insulating part is a plastic sheet.

23. The battery device according to any one of claims 1 to 8, characterized in that: The first wall is arranged on the bottom plate of the box body.

24. An electrical equipment, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 23, wherein the battery device is used to store or provide electrical energy.

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