Battery devices, energy storage devices and power consumption devices

Abstract

The present application belongs to the field of battery technology, and provides a battery device, an energy storage device, and an electric device. The battery device includes a box, a battery cell, a pressure chamber, and a conduction mechanism. The battery cell is arranged in the box, and the terminal of the battery cell is used to electrically connect the charging and discharging circuit. The pressure chamber is arranged on one side of the battery cell, and is used to transfer heat with the battery cell. The pressure chamber is built with a telescopic body whose volume changes with temperature, and the telescopic body includes mercury. The conduction mechanism is arranged between the pressure chamber and the terminal, and is used to transmit the telescopic action of the telescopic body to disconnect or connect the terminal of the battery cell with the charging and discharging circuit. The purpose is to properly control the over-temperature caused by the heat generated during the charging and discharging process of the battery cell.

Description

Technical Field

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

[0002] With the rise of new energy devices represented by new energy vehicles, battery devices have become a key source of power. Battery devices include battery cells. Battery cells utilize electrochemical battery material technology. The cost of electrochemical batteries is getting lower and lower, and they are widely used in various industries.

[0003] Electrochemical batteries store or release electrical energy through chemical reactions. The generation of heat is inevitable during the charging and discharging process. Poor heat control can easily lead to heat accumulation, which can cause battery failure or even fire and explosion when it reaches a certain level. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device, an energy storage device and an electrical device, which are intended to properly control the over-temperature caused by heat generated during the charging and discharging process of the battery cells.

[0005] To solve the above problems, in a first aspect, an embodiment of the present application provides a battery device, including:

[0006] Box;

[0007] A battery cell is disposed in the box, and a terminal of the battery cell is used to electrically connect a charging and discharging circuit;

[0008] A pressure chamber, provided at one side of the battery cell, for heat transfer with the battery cell, wherein the pressure chamber has a built-in telescopic body whose volume changes with temperature, wherein the telescopic body includes mercury; and

[0009] The conducting mechanism is arranged between the pressure chamber and the terminal, and is used to transmit the telescopic action of the telescopic body so as to disconnect or connect the terminal of the battery cell with the charging and discharging circuit.

[0010] The beneficial effects of the embodiments of the present application are as follows: when the heat dissipated by the battery cell is relatively large, the charging and discharging circuit can be cut off by means of the action of the telescopic body and the conduction mechanism, thereby preventing the temperature of the battery cell from continuing to rise, which can improve the safety of the battery cell to a certain extent, and the circuit connection can be restored after the temperature drops, so as to continue charging or discharging; mercury is a substance that is relatively sensitive to temperature changes, has good volume expansion, and has a certain mass, which can smoothly realize the pushing of the piston part.

[0011] In an embodiment of the first aspect, the pressure chamber is used to absorb the heat of the battery cell, the volume of the telescopic body increases as the temperature rises, and the conduction mechanism is used to cut off the connection between the terminal of the battery cell and the charging and discharging circuit. The pressure chamber provided in this embodiment triggers the conduction mechanism to cut off the electrical connection by means of absorbing heat to expand the telescopic body, which is easier to implement in terms of design. At the same time, the safety hazard is mainly caused by high temperature caused by continuous heating. This embodiment provides a better implementation form for reducing this major safety hazard, and the effect is obvious.

[0012] In an embodiment of the first aspect, the transmission mechanism comprises:

[0013] A first component, the first component is used to bear the pushing of the telescopic body;

[0014] a second component, the second component being used to cut off the connection between the terminal of the battery cell and the charging and discharging circuit; and

[0015] The middle component is connected between the first component and the second component to form a linkage structure.

[0016] This embodiment provides a structural form of a conduction mechanism, which is simple in design and easy to operate, and has good sensitivity and stability of action, thereby ensuring the operation of cutting off the circuit after heating.

[0017] In an embodiment of the first aspect, the first component includes a piston portion disposed in the pressure chamber and a first connecting rod connected to the piston portion, the first connecting rod has an extended end outside the pressure chamber connected to one end of the middle component, and the telescopic body pushes the piston portion after expansion.

[0018] The effect of this embodiment is that it provides a specific structural form of the first component, including a first connecting rod and a piston part. The structure is simple and easy to operate, and the operation is stable and reliable. By adopting the form of a piston part, the volume expansion of the telescopic body can effectively act on the piston part to complete the motion conversion.

[0019] In an embodiment of the first aspect, the second component includes a movable plate for cutting off the connection between the terminal and the charging and discharging circuit, and the movable plate is connected to the other end of the middle component. This embodiment uses the movable plate to cut off the circuit connection, which has a simple and reliable structure and obvious effect.

[0020] In an embodiment of the first aspect, the median component comprises:

[0021] a second connecting rod, one end of which is connected to the first connecting rod;

[0022] A third connecting rod, one end of which is connected to the moving plate; and

[0023] The rotating shaft is rotatably arranged in the box, and the other ends of the second connecting rod and the third connecting rod are fixedly connected to the rotating shaft. In this embodiment, by setting the middle part in the form of a lever structure, the displacement of the piston part can be well transmitted to the moving plate, so that the moving plate can smoothly cut off the circuit.

[0024] In an embodiment of the first aspect, the housing is further provided with a conduction chamber, the conduction mechanism is provided in the conduction chamber, a shaft seat is provided in the conduction chamber, the rotating shaft is rotatably provided on the shaft seat, and an end of the third connecting rod extends out of the conduction chamber and is connected to the movable plate. The conduction mechanism is a mechanical linkage structure provided in the housing, and in order to maintain its independence and not interfere with the electrical components or circuits in the housing, a separate conduction chamber is further provided in the housing, and the conduction chamber is a space for separately accommodating the conduction mechanism.

[0025] In an embodiment of the first aspect, at least the side wall of the pressure chamber close to the battery cell is a heat-conducting wall. The heat-conducting wall enables the pressure chamber to absorb more heat generated by the battery cell in time, thereby ensuring the circuit is cut off.

[0026] In an embodiment of the first aspect, the terminal of the battery cell is electrically connected to the charge-discharge circuit via a spring sheet, the spring sheet is connected to the charge-discharge circuit via an electrical connection contact, and the second component is used to push the spring sheet away from the electrical connection contact. Compared with directly pushing the battery cell to move and thus cut off the electrical connection, pushing the spring sheet to move to cut off the electrical connection is more convenient and requires less pushing force.

[0027] In an embodiment of the first aspect, the spring sheet includes a first segment for elastically pressing the electrical connection contact and a second segment for connecting the terminal of the battery cell, and the second segment is used to push the first segment. The spring sheet includes the first segment and the second segment, and the portion contacting the electrical connection contact and the portion contacting the terminal of the battery cell are directly separated and electrically connected to each other, thereby avoiding mutual interference between the two and making it easier to perform a subsequent cutting operation.

[0028] In an embodiment of the first aspect, the battery cell is detachably arranged in the box, and the second segment elastically presses the terminal of the battery cell when the telescopic body is in a natural state. This embodiment provides that the battery cell is detachably arranged in the box, which facilitates the maintenance of the battery cell. At the same time, when the battery cell is placed in the box, the terminal of the battery cell forms pressure on the second segment under the action of its own gravity. At this time, the second segment is squeezed, so that the second segment elastically presses the terminal of the battery cell. In this way, under the squeezing condition of a certain elastic force, the terminal of the battery cell can maintain a certain contact force with the second segment, and the electrical connection effect is better.

[0029] In an embodiment of the first aspect, a receiving groove is provided in the box body, the second segment is provided at the bottom of the receiving groove, the receiving groove is used to accommodate the terminal of the battery cell, and the first segment extends out of the receiving groove and elastically presses the electrical connection contact. This embodiment provides a specific form of mutual matching and mutual position relationship between the spring sheet and the terminal, which has a simple structure and is convenient to set up, and can achieve a better effect.

[0030] In an embodiment of the first aspect, the first segment includes an inclined segment and a pressure contact segment for contacting the electrical connection contact, the second component has an inclined surface adapted to the inclined segment, and the second component pushes the inclined segment to move through the inclined surface to drive the pressure contact segment to detach from the electrical connection contact. The effect of this embodiment is that it provides a structural form of the first segment, the pressure contact segment effectively ensures the electrical connection with the electrical connection contact, and the inclined segment can achieve a good pushing and matching with the second component to achieve the detachment and power-off operation of the pressure contact segment from the electrical connection contact.

[0031] In a second aspect, the present application also provides a specific embodiment of an energy storage device, including the battery device provided in any of the above embodiments, wherein the battery device is used to store or provide electrical energy.

[0032] In this example, the provided energy storage device has improved stability and safety in use due to the provided battery device.

[0033] In a third aspect, the present application further provides a specific embodiment of an electric device, including the battery device provided in any of the above embodiments or the energy storage device provided in the above embodiments. The electric device provided in this embodiment has a battery device or an energy storage device, and the safety of the electric device is improved.

[0034] 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

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0036] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0037] Figure 2 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0038] Figure 3 A schematic diagram of the internal structure of a battery device provided in some embodiments of the present application;

[0039] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0040] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0041] Figure 6 for Figure 3 Schematic diagram of the structure after cutting off the charge and discharge circuit;

[0042] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at C in the middle;

[0043] Figure 8 for Figure 3 Schematic diagram of the structure after the middle battery cell is lifted;

[0044] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure at D in the middle.

[0045] The reference numerals in the specific implementation manner are as follows:

[0046] 1000. Vehicles;

[0047] 100, battery device; 200, controller; 300, motor;

[0048] 10. Box body; 11. Battery cell; 12. Pressure chamber; 13. Conducting mechanism; 131. First component; 1311. Piston part; 1312. First connecting rod; 132. Middle component; 1321. Second connecting rod; 1322. Third connecting rod; 1323. Rotating shaft; 133. Second component; 1331. Moving plate; 14. Conducting chamber; 15. Shaft seat; 16. Shrapnel; 17. First segment; 171. Inclined segment; 172. Pressing contact segment; 18. Second segment; 19. Terminal; 20. Accommodating groove; 21. Electrical connection contact. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application will be 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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.

[0057] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

[0058] The battery device may include a plurality of battery cells, each of which includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator, that is, an electrochemical cell stores or releases electrical energy through a chemical reaction. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode collector, the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode collector, the negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer, and the negative electrode collector not coated with the negative electrode active material layer serves as a negative electrode ear. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon.

[0059] Since chemical reactions generate heat, if the temperature is not properly controlled, it will continue to rise. Especially during the charging process or when high power is consumed, the temperature of the battery cell will be greatly increased, reducing the reliability of use and even causing fire and explosion.

[0060] Based on the above considerations, an embodiment of the present application provides a battery device, which aims to solve the above problems to a certain extent.

[0061] The present application also provides an electric device having the battery device provided in the above embodiment, that is, an electric device using the battery device as a power source. Various energy storage systems using the battery device as an energy storage element are also provided. This can increase the safety of the electric device and the energy storage system.

[0062] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in hybrid connection through a busbar component, where hybrid connection refers to a mixture of series connection and parallel connection.

[0063] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0064] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0065] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0066] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0067] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0068] As an example, the box 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 to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0069] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0070] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0071] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, wherein the electrical devices may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. The vehicle 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.; the spacecraft includes airplanes, rockets, space shuttles, and spacecrafts, etc.; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0072] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electric devices such as vehicles, ships or aircraft. The electric device can use a power supply system with the battery device disclosed in the present application, which is conducive to improving the reliability of the electric device.

[0073] For the convenience of description, the following embodiments are described by taking the electric device provided in the embodiments of the present application as a vehicle as an example.

[0074] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 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.

[0075] In some embodiments of the present application, 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.

[0076] See also Figure 3-Figure 7 A battery device 100 provided in an embodiment of the present application is intended to properly control the over-temperature situation caused by heat generated during the charging and discharging process of the battery cell 11.

[0077] The battery device 100 provided in this embodiment includes a box body 10 , a battery cell 11 , a pressure chamber 12 , and a conduction mechanism 13 .

[0078] The battery cell 11 is disposed in the housing 10 , and the terminal 19 of the battery cell 11 is used to electrically connect to the charging and discharging circuit.

[0079] The pressure chamber 12 is disposed on one side of the battery cell 11 and is used for heat transfer with the battery cell 11 . The pressure chamber 12 has a built-in telescopic body whose volume changes with temperature.

[0080] The transmission mechanism 13 is disposed between the pressure chamber 12 and the terminal 19 and is used to transmit the telescopic movement of the telescopic body so as to disconnect or connect the terminal 19 of the battery cell 11 with the charging and discharging circuit.

[0081] Specifically, the box 10 has a space for accommodating the battery cell 11 and other devices. The box 10 is provided with a charging and discharging circuit, namely a charging circuit and a discharging circuit. The battery cell 11 is connected to both circuits at the same time. When charging is required, the charging circuit is connected to a power source, and when discharging is required, the discharging circuit is connected to a general electrical device.

[0082] The battery cell 11 may be square, cylindrical, etc., and has a positive terminal and a negative terminal, through which the battery cell 11 is connected to a charge and discharge circuit.

[0083] The pressure chamber 12 is a chamber in which the pressure inside can be large or small. A telescopic body is arranged inside. The telescopic body can be solid, liquid, colloid or even gas. When the telescopic body is arranged in the pressure chamber 12, it has a certain volume at room temperature. The pressure chamber 12 is located on the side of the battery cell 11. When the heat of the battery cell 11 increases, the pressure chamber 12 will absorb a certain amount of heat released by the battery cell 11, causing the volume of the internal telescopic body to expand. When the volume of the telescopic body expands, the conduction mechanism 13 will be triggered, so that the conduction mechanism 13 will be actuated to cut off the connection between the terminal 19 of the battery cell 11 and the charging and discharging circuit, thereby avoiding the high temperature generated by the continuous heat release of the battery cell 11. The telescopic action of the transmission telescopic body refers to the telescopic body causing the conduction mechanism 13 to actuate after the telescopic body is extended and retracted, and the conduction mechanism 13 realizes the disconnection between the terminal 19 and the charging and discharging circuit through the action.

[0084] Alternatively, in some cases, when the circuit of the battery cell 11 is cut off, the temperature may gradually return to normal. At this time, after the heat in the pressure chamber 12 dissipates, the volume of the telescopic body shrinks, causing the conductive mechanism 13 to reverse, thereby restoring the connection between the terminal 19 of the battery cell 11 and the charging and discharging circuit.

[0085] The effect of this embodiment is that when the heat dissipated by the battery cell 11 is relatively large, the charging and discharging circuit can be cut off by means of the action of the telescopic body and the conduction mechanism 13, thereby preventing the temperature of the battery cell 11 from being too high. The safety of the use of the battery cell 11 can be guaranteed to a certain extent, and the circuit connection can be restored after the temperature drops, so as to continue charging or discharging.

[0086] In some embodiments, the pressure chamber 12 is used to absorb the heat of the battery cell 11, the volume of the telescopic body increases as the temperature increases, and the conduction mechanism 13 is used to cut off the connection between the terminal 19 of the battery cell 11 and the charging and discharging circuit.

[0087] Specifically, since a general battery cell 11 may continue to dissipate heat, the main function of the pressure chamber 12 is to absorb the heat of the battery cell 11 and enable the conductive mechanism 13 to cut off the connection between the terminal 19 and the charging and discharging circuit. After the connection is cut off, the operator can perform inspection and maintenance operations, such as checking the heat exchange system of the battery cell 11, and can manually make electrical connections again after recovery. When the temperature in the pressure chamber 12 rises, the operation is implemented in the form of expansion of the telescopic body as the temperature rises. When the telescopic body expands, it is easier to trigger the conductive mechanism 13 in the design form to cut off the electrical connection.

[0088] The pressure chamber 12 provided in this embodiment triggers the conduction mechanism 13 to cut off the electrical connection by means of absorbing heat to expand the telescopic body. This is easier to implement in terms of design. At the same time, the safety hazard is mainly caused by the high temperature caused by continuous heating. This embodiment provides a better implementation form for reducing this major safety hazard, and the effect is obvious.

[0089] In some embodiments, see Figure 3 , Figure 4 , Figure 6 and Figure 7 The transmission mechanism 13 includes a first component 131 , a second component 133 , and a middle component 132 .

[0090] The first component 131 is used to withstand the pushing of the telescopic body.

[0091] The second component 133 is used to cut off the connection between the terminal 19 of the battery cell 11 and the charging and discharging circuit.

[0092] The middle component 132 is connected between the first component 131 and the second component 133 to form a linkage structure.

[0093] Specifically, the space of the pressure chamber 12 is fixed, and a telescopic body is arranged in the pressure chamber 12. When the volume of the telescopic body expands, it pushes the first component 131. Part of the first component 131 can be located inside the pressure chamber 12, and receive the push of the telescopic body, so that the first component 131 moves by a displacement amount, and this displacement amount is a preset displacement amount.

[0094] The second component 133 is used to cut off the connection between the terminal 19 and the charging and discharging circuit. The middle component 132 is a component located between the first component 131 and the second component 133, and its two ends are respectively connected to the first component 131 and the second component 133. When the first component 131 reaches a preset displacement, the linkage conduction of the middle component 132 finally causes the second component 133 to act, and finally cuts off the circuit connection, terminating the charging and discharging of the battery cell 11.

[0095] The linkage structure refers to the first component 131, the middle component 132 and the second component 133 being connected to each other to form a linkage overall structure, that is, the movement of the first component 131 will simultaneously drive the middle component 132 and the second component 133 to move.

[0096] This embodiment provides a structural form of the conduction mechanism 13, which is simple in design and easy to operate, and has good sensitivity and stability of action, thereby ensuring the operation of cutting off the circuit after heating.

[0097] In some embodiments, it is also provided that Figure 3 and Figure 6The first component 131 includes a piston portion 1311 disposed in the pressure chamber 12 and a first connecting rod 1312 connected to the piston portion 1311. The first connecting rod 1312 is connected to one end of the middle component 132 at an extended end outside the pressure chamber 12. The telescopic body pushes the piston portion 1311 after expansion.

[0098] Specifically, the piston part 1311 is a structure located in the pressure chamber 12. The cross-sectional shape of the piston part 1311 can be the same as the cross-sectional shape of the inner cavity of the pressure chamber 12. The piston part 1311 can be plate-shaped. The peripheral side of the piston part 1311 and the inner wall of the pressure chamber 12 are provided with a sliding seal. When the telescopic body in the pressure chamber 12 expands, it will push the piston part 1311, and the piston part 1311 moves along the inner wall, and the first connecting rod 1312 moves accordingly. The first connecting rod 1312 extends out of the pressure chamber 12 and connects the middle part 132, thereby realizing the movement of the middle part 132. Lubricating material can be provided between the peripheral side of the piston part 1311 and the inner wall of the pressure chamber 12 to reduce friction. One side of the piston part 1311 is the pressure chamber 12 space for accommodating the telescopic body, and the pressure chamber 12 space on the other side is not provided with a telescopic body, and is specifically provided with the first connecting rod 1312, which also provides a certain amount of moving space for the piston part 1311.

[0099] The effect of this embodiment is that it provides a specific structural form of the first component 131, including a first connecting rod 1312 and a piston part 1311. The structure is simple and easy to operate, and the operation is stable and reliable. By adopting the form of the piston part 1311, the volume expansion of the telescopic body can effectively act on the piston part 1311 to complete the motion conversion.

[0100] In some embodiments, see Figure 4 , Figure 5 and Figure 7 The second component 133 includes a movable plate 1331 for cutting off the connection between the terminal 19 and the charging and discharging circuit, and the movable plate 1331 is connected to the other end of the middle component 132.

[0101] Specifically, the movable plate 1331 is a plate structure connected to the other end of the middle component 132. When the first component 131 pushes the middle component 132, the middle component 132 drives the movable plate 1331 to move, and the terminal 19 of the battery cell 11 is disconnected from the charging and discharging circuit during the movement.

[0102] The movable plate 1331 can directly push the battery cell 11 to move the battery cell 11, so that the terminal 19 of the battery cell 11 is away from the electrical connection contact 21; or, the movable plate 1331 can also directly push the connection structure between the terminal 19 of the battery cell 11 and the electrical connection contact 21, such as a conductive sheet, to cut off the electrical connection.

[0103] The shape of the movable plate 1331 can be designed according to the shape of the conductive sheet or a shape suitable for pushing up the battery cell 11 .

[0104] This embodiment cuts off the circuit connection by moving the plate 1331, and has a simple and reliable structure and an obvious effect.

[0105] In some embodiments, referring to FIG. Figure 3 and Figure 6 The middle component 132 includes a second connecting rod 1321 , a third connecting rod 1322 , and a rotating shaft 1323 .

[0106] One end of the second connecting rod 1321 is connected to the first connecting rod 1312 ; one end of the third connecting rod 1322 is connected to the movable plate 1331 ; the rotating shaft 1323 is rotatably disposed in the box body 10 , and the other ends of the second connecting rod 1321 and the third connecting rod 1322 are fixedly connected to the rotating shaft 1323 .

[0107] Specifically, the middle component 132 can be regarded as a lever structure, the rotating shaft 1323 is rotatably arranged, and is fixedly connected to one end of the second connecting rod 1321 and the third connecting rod 1322 at different positions. When the rotating shaft 1323 rotates, the second connecting rod 1321 and the third connecting rod 1322 both swing around the rotating shaft 1323. When the first connecting rod 1312 moves, the second connecting rod 1321 will swing, driving the rotating shaft 1323 to rotate, and finally driving the third connecting rod 1322 to swing. When the third connecting rod 1322 swings, the movement of the movable plate 1331 is realized.

[0108] The connection form between the second connecting rod 1321 and the first connecting rod 1312 can be that a sleeve rod is set on the second connecting rod 1321, and a ring is set at the end of the first connecting rod 1312, and the ring is put on the sleeve rod. The inner diameter of the ring can be larger than the outer diameter of the sleeve rod, so that the first connecting rod 1312 can push and pull the second connecting rod 1321.

[0109] In this embodiment, by configuring the middle component 132 to be a lever structure, the displacement of the piston portion 1311 can be well transmitted to the moving plate 1331 , so that the moving plate 1331 can smoothly cut off the circuit.

[0110] In some embodiments, see Figure 3 and Figure 6 The box body 10 is also provided with a conduction chamber 14, the conduction mechanism 13 is arranged in the conduction chamber 14, an axle seat 15 is arranged in the conduction chamber 14, a rotating shaft 1323 is rotatably arranged on the axle seat 15, and an end of the third connecting rod 1322 extends out of the conduction chamber 14 and is connected to the moving plate 1331.

[0111] Specifically, the transmission mechanism 13 is a mechanical linkage structure disposed in the housing 10. In order to maintain its independence and not interfere with the electrical components or circuits inside the housing 10, a separate transmission chamber 14 is also disposed in the housing 10. The transmission chamber 14 is a space for separately accommodating the transmission mechanism 13. The rotating shaft 1323 can be rotatably disposed in the transmission chamber 14 by means of a shaft seat 15. The shaft seat 15 is fixedly disposed at the bottom of the transmission chamber 14, and the rotating shaft 1323 is rotatably disposed on the shaft seat 15. The end of the third connecting rod 1322 can extend out of the transmission chamber 14 to connect to the moving plate 1331, and the first component 131 can be partially located in the transmission chamber 14 to connect to the second connecting rod 1321. For example, the first connecting rod 1312 can be partially located in the transmission chamber 14 to connect to the second connecting rod 1321.

[0112] In some embodiments, the telescopic body includes mercury. Mercury is a substance that is sensitive to temperature changes, has good volume expansion, and has a certain mass, which can smoothly achieve the pushing of the piston part 1311. Mercury expands when heated and pushes the telescopic body. After the mercury temperature drops, the volume shrinks, and the air pressure in the pressure chamber 12 decreases. The piston part 1311 can return to its original position under atmospheric pressure, thereby removing the function of the second component 133 and restoring the electrical connection.

[0113] In some embodiments, at least the side wall of the pressure chamber 12 close to the battery cell 11 is a heat conductive wall.

[0114] Specifically, the pressure chamber 12 is a cavity for accommodating the telescopic body, which absorbs the heat released from the battery cell 11, so at least the side wall close to the battery cell 11 is set as a heat-conducting wall, that is, a heat-conducting material is used, so that heat conduction can be carried out efficiently; alternatively, all the side walls of the pressure chamber 12 can be set as heat-conducting walls formed of heat-conducting materials.

[0115] Generally, when the battery cell 11 works normally, that is, the heat dissipation and water cooling system are all normal, the heat absorbed by the pressure chamber 12 is very small, which is not enough to expand the telescopic body to the extent of pushing the piston part 1311, or the pushing force is not strong enough to move the moving plate 1331 to cut off the circuit connection. Only when the heat dissipated by the battery cell 11 increases and a large amount of heat is transferred to the pressure chamber 12, will the action occur.

[0116] Therefore, the heat-conducting wall is provided so that when the battery cell 11 generates more heat, the heat can be absorbed by the pressure chamber 12 in time, thereby ensuring the circuit-cutting operation.

[0117] In some embodiments, see Figure 5 and Figure 7The terminal 19 of the battery cell 11 is electrically connected to the charge and discharge circuit through the spring 16 , and the spring 16 is connected to the charge and discharge circuit through the electrical connection contact 21 . The second component 133 is used to push the spring 16 away from the electrical connection contact 21 .

[0118] Specifically, the spring 16 is a conductor, specifically a metal conductor. One end of the spring 16 can contact the electrical connection contact 21 of the charge and discharge circuit, and the other end can contact the terminal 19 of the battery cell 11, thereby realizing the electrical connection of the circuit. Compared with directly pushing the battery cell 11 to move and cut off the electrical connection, pushing the spring 16 to move to cut off the electrical connection is more convenient, and the required pushing force is also smaller. When the spring 16 contacts the electrical connection contact 21, it maintains a certain pressure contact force, that is, elastic force. When the second component 133 pushes the spring 16, it just moves the spring 16 away from the electrical connection contact 21.

[0119] In some embodiments, see Figure 5 and Figure 7 The spring piece 16 includes a first segment 17 for elastically pressing the electrical connection contact 21 and a second segment 18 for connecting the terminal 19 of the battery cell 11 , and the second component 133 is used to push the first segment 17 .

[0120] Specifically, the spring 16 includes a first segment 17 and a second segment 18, which facilitates subsequent cutting operations. For example, when the temperature of the pressure chamber 12 is high and the telescopic body expands, the first segment 17 can be driven away from the electrical connection contact 21 by the action of the conduction mechanism 13, thereby cutting off the circuit connection.

[0121] The shape of the spring piece 16 may be a V-shaped structure, and the two wings of the V-shape may be the first segment 17 and the second segment 18 respectively.

[0122] Elastic pressure contact means that when the first segment 17 contacts the electrical connection contact 21 , the elastic force of the spring piece 16 itself maintains a certain pressure on the electrical connection contact 21 , so that effective contact can be maintained and virtual contact can be avoided.

[0123] The second segment 18 is connected to the terminal 19 of the battery cell 11 , which means that the two can be connected to each other or can be in contact with each other and can maintain a certain elastic pressing force.

[0124] The electrical connection contacts 21 are contacts for electrically connecting the charging and discharging circuits.

[0125] In some embodiments, see Figure 3 , Figure 4 , Figure 5 as well as Figure 8 , Fig. 9The battery cell 11 is detachably arranged in the box body 10 , and when the telescopic body is in a natural state, that is, in a normal charging and discharging state, the second segment 18 elastically presses the terminal 19 of the battery cell 11 .

[0126] Specifically, the present embodiment provides that the battery cell 11 is detachably arranged in the box body 10, which facilitates the maintenance of the battery cell 11. At the same time, when the battery cell 11 is placed in the box body 10, the terminal 19 of the battery cell 11 forms pressure on the second segment 18 under the action of its own gravity. At this time, the second segment 18 is squeezed, so that the second segment 18 elastically presses the terminal 19 of the battery cell 11. In this way, under the squeezing condition of a certain elastic force, the terminal 19 of the battery cell 11 can maintain a certain contact force with the second segment 18, and the electrical connection effect is better.

[0127] In some embodiments, see Figure 4 , Figure 5 , Figure 7 and Fig. 9 A receiving groove 20 is provided in the box body 10, and the second segment 18 is arranged at the bottom of the receiving groove 20. The receiving groove 20 is used to accommodate the terminal 19 of the battery cell 11. The first segment 17 extends out of the receiving groove 20 and elastically presses the electrical connection contact 21.

[0128] Specifically, a receiving groove 20 is provided in the box body 10, which is equivalent to providing a space for placing the terminal 19 of the battery cell 11, and also enables the battery cell 11 to be set at a preset position in the box body 10, and the setting is relatively stable. The second segment 18 is directly installed on the bottom of the receiving groove 20. When the terminal 19 is placed in the groove, the second segment 18 is pressed so that the second segment 18 fits the bottom of the groove, and at the same time, the second segment 18 maintains a pressing force on the terminal 19.

[0129] The first segment 17 passes through the bottom of the groove, and one end of the first segment 17 is connected to the second segment 18 at the bottom of the groove. The other end of the first segment 17 extends out of the receiving groove 20 . The extended portion contacts the electrical connection contact 21 and maintains a certain pressure contact force with the electrical connection contact 21 .

[0130] Specifically, a support plate structure can be provided in the box body 10, and a receiving groove 20 can be provided on the support plate. The shape of the receiving groove 20 can be adapted to the shape of the terminal 19 of the battery cell 11. A hollow structure can be formed inside the support plate, and the electrical connection contact 21 can be provided inside the support plate. The first segment 17 extends out of the receiving groove 20 after passing through the bottom of the groove, and at the same time extends into the hollow structure inside the support plate and contacts the electrical connection contact 21. The second component 133, that is, the above-mentioned movable plate 1331 can extend into the hollow structure inside the support plate and contact the first segment 17, and push the first segment 17 away from the electrical connection contact 21 by moving. At the same time, when the movable plate 1331 retreats and separates from the first segment 17, the first segment 17 can also return to its original position and contact the electrical connection contact 21 again due to its elasticity.

[0131] This embodiment provides a specific form of the mutual matching and mutual position relationship between the spring piece 16 and the terminal 19, which has a simple structure and is convenient to set up, and can achieve a better effect.

[0132] In some embodiments, see Figure 5 , Figure 7 and Fig. 9 The first segment 17 includes an inclined segment 171 and a pressure contact segment 172 for contacting the electrical connection contact 21. The second component 133 has an inclined surface adapted to the inclined segment 171. The second component 133 pushes the inclined segment 171 to move through the inclined surface to drive the pressure contact segment 172 to separate from the electrical connection contact 21.

[0133] Specifically, the first segment 17 includes an inclined segment 171 and a pressure contact segment 172. The pressure contact segment 172 is used to contact the electrical connection contact 21. The contact surface of the pressure contact segment 172 is adapted to the surface shape of the electrical connection contact 21, so that the two can maintain the best contact and connection effect. The inclined segment 171 is used to contact the second component 133, and is used to withstand the push of the second component 133, while driving the pressure contact segment 172 to separate from the electrical connection contact 21. One end of the inclined segment 171 is connected to the pressure contact segment 172, and the other end is connected to the second segment 18, and the connection between the inclined segment 171 and the second segment 18 is fixedly set at the bottom of the groove 20, so that the entire spring piece 16 is positioned.

[0134] The effect of this embodiment is that it provides a structural form of the first segment 17, the pressure contact segment 172 effectively ensures the contact and electrical connection with the electrical connection contact 21, and the inclined segment 171 can achieve a good push-up match with the inclined surface of the second component 133, so as to achieve the disconnection and power-off operation of the pressure contact segment 172 and the electrical connection contact 21. When the second component 133 is a moving plate 1331, the inclined surface is located on the side of the moving plate 1331.

[0135] The present application also provides an energy storage device, including the above-mentioned battery device 100, and the battery device 100 is used to store or provide electrical energy.

[0136] The energy storage device of this embodiment includes one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices 100, and the multiple battery devices 100 are connected in series through a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0137] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it at the appropriate time. For example, energy storage devices can store electrical energy when electricity consumption is low, and provide electrical energy to relevant users or electrical equipment during peak electricity consumption.

[0138] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0139] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0140] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0141] As an example, the thermal management module may include a liquid cooling unit, which provides cooling liquid for adjusting the temperature of the battery cells 11 to each battery device 100 through a pipeline.

[0142] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (SBMU), a fusion switch and other modules.

[0143] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module and other modules.

[0144] As an example, the fire protection module includes a control panel, a detector, an alarm device, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0145] As an example, the power distribution module can be used to distribute power to modules in the energy storage device that require power.

[0146] This embodiment may also provide an energy storage system, including a power conversion device and the above-mentioned energy storage device, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0147] The energy storage system provided in the embodiments of the present application may be any power system that requires an energy storage device.

[0148] The energy storage system may include one or more energy storage devices and a power converter system (PCS), and the power converter system is used to connect between the power generation equipment and the energy storage device. The power generation equipment is used to generate electrical energy, and the electrical energy generated by the power generation equipment can be stored in the energy storage device through the power converter. As an example, the power generation equipment may specifically be a solar panel, a hydropower generation equipment, a thermal power generation equipment, a wind power generation equipment, etc. Among them, the specific type of the power generation equipment is not limited in this application.

[0149] This embodiment further provides an electrical device, including the above-mentioned battery device 100 or the above-mentioned energy storage device or the above-mentioned energy storage system.

[0150] The present application may also provide a charging network, including a charging pile, the above-mentioned energy storage device or the above-mentioned energy storage system, wherein the energy storage device is used to provide electrical energy to the charging pile.

[0151] The charging pile is electrically connected to the battery device 100 in the energy storage device through a cable, and the battery device 100 can provide its stored electrical energy to the charging pile. The charging pile has one or more connectors, which are used to connect to an electrical device (such as a vehicle) so as to replenish energy to the electrical device.

[0152] The energy storage device can be located inside the charging pile (such as an integrated storage and charging machine) or outside the charging pile.

[0153] 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: Box; A battery cell is disposed in the box, and a terminal of the battery cell is used to electrically connect a charging and discharging circuit; A pressure chamber, provided at one side of the battery cell, for heat transfer with the battery cell, wherein the pressure chamber is provided with a telescopic body whose volume changes with temperature, wherein the telescopic body comprises mercury; and The conducting mechanism is arranged between the pressure chamber and the terminal, and is used to transmit the telescopic action of the telescopic body so as to disconnect or connect the terminal of the battery cell with the charging and discharging circuit.

2. The battery device according to claim 1, characterized in that The pressure chamber is used to absorb the heat of the battery cell, the volume of the telescopic body increases as the temperature rises, and the conduction mechanism is used to cut off the connection between the terminal of the battery cell and the charging and discharging circuit.

3. The battery device according to claim 2, characterized in that: The transmission mechanism comprises: A first component, the first component is used to bear the pushing of the telescopic body; a second component, the second component being used to cut off the connection between the terminal of the battery cell and the charging and discharging circuit; and The middle component is connected between the first component and the second component to form a linkage structure.

4. The battery device according to claim 3, characterized in that: The first component includes a piston portion arranged in the pressure chamber and a first connecting rod connected to the piston portion. The first connecting rod is connected to one end of the middle component at an end extending outside the pressure chamber. The telescopic body pushes the piston portion after expansion.

5. The battery device according to claim 4, characterized in that: The second component includes a movable plate for cutting off the connection between the terminal and the charge and discharge circuit, and the movable plate is connected to the other end of the middle component.

6. The battery device according to claim 5, characterized in that The middle component comprises: a second connecting rod, one end of which is connected to the first connecting rod; A third connecting rod, one end of which is connected to the moving plate; and A rotating shaft is rotatably arranged in the box body, and the other end of the second connecting rod and the other end of the third connecting rod are both fixedly connected to the rotating shaft.

7. The battery device according to claim 6, characterized in that: The box body is also provided with a conduction chamber, the conduction mechanism is arranged in the conduction chamber, an axle seat is arranged in the conduction chamber, the rotating shaft is rotatably arranged on the axle seat, and the end of the third connecting rod extends out of the conduction chamber and is connected to the moving plate.

8. The battery device according to any one of claims 1 to 7, characterized in that: At least a side wall of the pressure chamber close to the battery cell is a heat-conducting wall.

9. The battery device according to any one of claims 3 to 7, characterized in that: The terminals of the battery cell are electrically connected to the charge and discharge circuit via a spring sheet, the spring sheet is connected to the charge and discharge circuit via an electrical connection contact, and the second component is used to push the spring sheet away from the electrical connection contact.

10. The battery device according to claim 9, characterized in that The spring sheet includes a first segment for elastically pressing the electrical connection contact and a second segment for connecting the terminal of the battery cell, and the second component is used to push the first segment.

11. The battery device according to claim 10, characterized in that: The battery cell is detachably disposed in the box, and the second segment elastically presses against the terminal of the battery cell when the telescopic body is in a natural state.

12. The battery device according to claim 10, characterized in that The box body is provided with a receiving groove, the second segment is arranged at the groove bottom of the receiving groove, the receiving groove is used to accommodate the terminal of the battery cell, and the first segment extends out of the receiving groove and elastically presses the electrical connection contact.

13. The battery device according to claim 10, characterized in that: The first segment includes an inclined segment and a pressure contact segment for contacting an electrical connection contact, the second component has an inclined surface adapted to the inclined segment, and the second component pushes the inclined segment to move through the inclined surface to drive the pressure contact segment to separate from the electrical connection contact.

14. An energy storage device, characterized in that: The invention comprises a battery device as described in any one of claims 1 to 13, wherein the battery device is used to store or provide electrical energy.

15. An electrical device, characterized in that: It comprises the battery device according to any one of claims 1 to 13 or the energy storage device according to claim 14.

Images