Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. Relates to the technical field of batteries. The battery pack comprises a shell, a separator, a temperature and pressure detection part, a control part and a plurality of battery cells, the plurality of battery cells are sequentially arranged along a first direction; the separators are arranged between the adjacent battery cells; the temperature and pressure detection parts are arranged between the adjacent battery cells; the temperature and pressure detection piece is electrically connected with the control piece; the control piece is used for obtaining a detection signal of the temperature and pressure detection piece. By arranging the temperature and pressure detection pieces between the adjacent battery cells, when the battery cells are out of control and the battery cell explosion-proof valves of the battery cells are not opened, the temperature and pressure detection pieces can detect the internal changes of the battery cells, the control piece can more quickly identify temperature and pressure abnormal conditions, the response time is shortened, and the battery cell explosion-proof valves of the battery cells are not opened. The temperature and pressure identification speed during thermal runaway of the battery pack is improved, and the safety risk caused by thermal runaway is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack and electrical device. Background Technology

[0002] When a cell in a battery pack experiences thermal runaway, the temperature and pressure of the battery pack will change. Accurately identifying these temperature and pressure changes is crucial for preventing and responding to thermal runaway events.

[0003] In related technologies, the battery pack is equipped with temperature sensors, pressure sensors, and a controller. The controller acquires signals from the temperature and pressure sensors in real time. When the cell explosion-proof valve opens, the temperature and pressure within the battery pack change, and the controller detects the abnormal temperature and pressure.

[0004] However, existing battery packs suffer from slow temperature and pressure recognition speeds. Utility Model Content

[0005] This application provides a battery pack and electrical device that improves the speed of temperature and pressure identification during thermal runaway of the battery pack and reduces the safety risks caused by thermal runaway.

[0006] In a first aspect, embodiments of this application provide a battery pack, comprising:

[0007] The shell has a first cavity;

[0008] Multiple battery cells are located in the first cavity, and the multiple battery cells are arranged sequentially along the first direction;

[0009] Separators are placed between adjacent cells;

[0010] Temperature and pressure detection devices are installed between adjacent battery cells;

[0011] The control unit, temperature and pressure detection unit, and control unit are electrically connected; the control unit is used to acquire the detection signals from the temperature and pressure detection unit.

[0012] In some embodiments of this application, the separator is formed with a second cavity.

[0013] The separator has an edge region and a central region, with the edge region surrounding the outer periphery of the central region; a second cavity is disposed in the central region.

[0014] The temperature and pressure sensing element is located in the second cavity.

[0015] In some embodiments of this application, the battery cell, temperature and pressure detection device, and separator are arranged sequentially along a first direction.

[0016] Along a plane perpendicular to the first direction, the separator has an edge region and a central region, with the edge region surrounding the central region.

[0017] The two ends of the temperature and pressure detection device are respectively in contact with the central area of ​​the battery cell and the separator.

[0018] In some embodiments of this application, along a plane perpendicular to the first direction, a mounting groove is provided on the side of the separator closer to the battery cell; the opening of the mounting groove faces the battery cell.

[0019] Along the first direction, the separator has an edge region and a central region, with the edge region surrounding the central region; a mounting groove is provided in the central region.

[0020] The temperature and pressure sensing element is located in the mounting slot.

[0021] In some embodiments of this application, the battery pack also includes a transmission component.

[0022] The separator has a connecting cavity, and the two ends of the connecting cavity are connected to the second cavity and the first cavity, respectively.

[0023] The transmission component is located in the connecting cavity, and the control component is located in the first cavity.

[0024] The two ends of the transmission component are electrically connected to the temperature and pressure detection component and the control component, respectively.

[0025] In some embodiments of this application, the temperature and pressure detection element has a transmitting end, and the control element has a receiving end.

[0026] The transmitting end of the temperature and pressure sensing element faces the receiving end of the control element; the receiving end is used to receive the signal transmitted by the transmitting end of the temperature and pressure sensing element.

[0027] In some embodiments of this application, the material of the separator includes aerogel or foam.

[0028] In some embodiments of this application, the battery pack further includes a buzzer; the buzzer is disposed on the outer periphery of the housing.

[0029] The buzzer and control unit are electrically connected; the buzzer is used to issue alarm information.

[0030] In some embodiments of this application, the temperature and pressure detection device includes a temperature sensor and a pressure sensor.

[0031] And / or, the temperature and pressure sensing element includes a temperature and pressure composite sensor.

[0032] Secondly, embodiments of this application provide an electrical device, including a battery pack.

[0033] The battery pack and electrical device provided in this application include a housing, separators, temperature and pressure detection devices, a control device, and multiple battery cells. The housing has a first cavity; multiple battery cells are located in the first cavity and are arranged sequentially along a first direction; separators are disposed between adjacent battery cells; temperature and pressure detection devices are disposed between adjacent battery cells; the temperature and pressure detection devices and the control device are electrically connected; the control device is used to acquire detection signals from the temperature and pressure detection devices.

[0034] The battery pack provided in this application embodiment, by placing temperature and pressure detection devices between adjacent battery cells, can detect internal changes in the battery cell when it experiences thermal runaway and the cell's explosion-proof valve is not open. By acquiring and analyzing the detection signals in real time, the control unit can more quickly identify abnormal temperature and pressure conditions, reduce response time, and improve the speed of temperature and pressure identification during battery pack thermal runaway. Through a faster identification and response mechanism, the control unit can take measures more promptly, reducing the safety risks caused by thermal runaway. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 This is a schematic diagram of the structure of the battery cell and separator of the battery pack provided in the embodiments of this application;

[0037] Figure 2 A schematic diagram of the structure of the separator of the battery pack provided in the embodiments of this application. Figure 1 ;

[0038] Figure 3 A schematic diagram of the structure of the separator of the battery pack provided in the embodiments of this application. Figure 2 .

[0039] Explanation of reference numerals in the attached figures:

[0040] 100: Battery cell;

[0041] 200: Separator; 210: Edge area; 220: Central area; 230: Second cavity.

[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0044] In battery pack design, accurately identifying changes in temperature and pressure is crucial for preventing and responding to thermal runaway events.

[0045] In related technologies, a battery pack includes a casing, battery cells, a temperature sensor, a pressure sensor, and a controller. The casing has a cavity. The battery cells, temperature sensor, and pressure sensor are all located within the cavity. The temperature sensor and pressure sensor acquire the temperature and pressure within the battery pack cavity in real time. Simultaneously, the temperature sensor and pressure sensor transmit the acquired detection signals to the controller. The controller acquires the detection signals from the temperature sensor and pressure sensor in real time.

[0046] When a cell experiences thermal runaway, the cell's explosion-proof valve opens, causing changes in temperature and pressure within the battery pack cavity. Temperature signals from the temperature sensor and pressure signals from the pressure sensor are transmitted to the controller. The controller detects the abnormal temperature and pressure and issues instructions, such as cutting off the power supply or activating the cooling system.

[0047] In related technologies, temperature and pressure sensors are typically located within the battery pack's cavity, and they can only detect changes in temperature and pressure in the external environment of the battery cells. The temperature signal acquired by the temperature sensor and the pressure signal acquired by the pressure sensor represent the temperature and pressure within the battery pack cavity after the cell's explosion-proof valve is opened.

[0048] However, thermal runaway typically begins inside the battery cell, where the internal temperature and pressure start to rise. The opening of the cell's explosion-proof valve is a passive process, triggered only when the internal pressure reaches a set value. In other words, even before the explosion-proof valve opens, temperature and pressure changes have already occurred inside the cell.

[0049] Therefore, the temperature and pressure signals acquired by temperature and pressure sensors in related technologies exhibit a lag. Due to this lag in recognition speed, the battery pack may be unable to take timely and effective countermeasures in the event of thermal runaway, increasing safety risks. In summary, existing battery packs suffer from slow temperature and pressure recognition speeds.

[0050] In view of this, embodiments of this application provide a battery pack and an electrical device. The battery pack includes a housing, separators, temperature and pressure detection devices, a control device, and multiple battery cells. The housing forms a first cavity; multiple battery cells are located in the first cavity and are arranged sequentially along a first direction; separators are disposed between adjacent battery cells; temperature and pressure detection devices are disposed between adjacent battery cells; the temperature and pressure detection devices and the control device are electrically connected; the control device is used to acquire the detection signals from the temperature and pressure detection devices.

[0051] The battery pack provided in this application embodiment, by placing temperature and pressure detection devices between adjacent battery cells, can detect internal changes in the battery cell even when the cell's explosion-proof valve is not open, in the event of cell runaway. Compared to related technologies, where the temperature and pressure signals acquired by the temperature and pressure sensors are the temperature and pressure signals of the first chamber after the cell's explosion-proof valve is opened, the battery pack provided in this application embodiment, through real-time acquisition and analysis of detection signals, allows the control unit to more quickly identify abnormal temperature and pressure conditions, reducing response time and improving the speed of temperature and pressure identification during battery pack thermal runaway. With a faster identification and response mechanism, the control unit can take measures more promptly, reducing the safety risks caused by thermal runaway.

[0052] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0053] In a first aspect, embodiments of this application provide a battery pack, comprising:

[0054] The shell has a first cavity;

[0055] Multiple battery cells 100 are located in the first cavity and are arranged sequentially along the first direction;

[0056] A separator 200 is disposed between adjacent cells 100;

[0057] Temperature and pressure detection devices are installed between adjacent cells 100;

[0058] The control unit, temperature and pressure detection unit, and control unit are electrically connected; the control unit is used to acquire the detection signals from the temperature and pressure detection unit.

[0059] Exemplarily, the housing provides structural support and protection, forming a first cavity to house the battery cell 100, the separator 200, and the temperature and pressure sensing elements. The housing ensures the overall structural integrity of the battery pack and provides a relatively stable environment for the internal components.

[0060] Reference Figure 1 As shown, multiple battery cells 100 are arranged sequentially along a first direction. The first direction is referenced... Figure 1 The direction is indicated by X in the middle. Multiple battery cells 100 serve as the core energy storage unit of the battery pack, providing electrical energy output to support the operation of electrical equipment.

[0061] The separator 200 is disposed between adjacent cells 100 to provide physical isolation. It prevents direct contact between cells 100, reduces the risk of short circuits, and helps with thermal management by slowing heat transfer through increased thermal resistance.

[0062] Temperature and pressure sensors are installed between adjacent cells 100 to detect temperature and pressure changes in real time. By placing these sensors between adjacent cells 100, the control unit can detect temperature and pressure changes in cell 100 when thermal runaway occurs and the cell 100's explosion-proof valve is not open, thereby reducing detection lag.

[0063] The control unit is electrically connected to the temperature and pressure sensors to acquire detection signals. The control unit processes and analyzes the signals from the temperature and pressure sensors in real time, quickly identifies abnormal situations, and triggers corresponding safety measures. The control unit can be a controller. The controller is responsible for processing the detection signals from the temperature and pressure sensors, executing algorithms, and controlling components within the battery pack.

[0064] In some embodiments, when thermal runaway occurs in the battery cell 100 and the cell's explosion-proof valve is not activated, the thermal runaway causes a rapid rise in the internal temperature of the battery cell 100. Simultaneously, the electrolyte inside the battery cell 100 decomposes at high temperatures, producing flammable gases such as hydrogen, oxygen, carbon monoxide, and carbon dioxide. These gases increase the internal pressure of the battery cell 100. Due to the generation of these gases, the internal pressure of the battery cell 100 increases significantly, potentially causing the battery cell 100 casing to expand or rupture.

[0065] In other words, when thermal runaway occurs in cell 100 and the cell explosion-proof valve is not open, the temperature and pressure inside cell 100 change. Since multiple cells 100 are arranged sequentially, the cell 100 experiencing thermal runaway will compress adjacent cells 100 under the action of high-temperature and high-pressure gas inside. At this time, the temperature and pressure detection devices located between adjacent cells 100 will detect abnormal temperature and pressure data.

[0066] The battery pack provided in this application embodiment, by placing temperature and pressure detection devices between adjacent battery cells 100, can detect internal changes in the battery cell 100 when it runs out of control and the cell explosion-proof valve of the battery cell 100 is not open. Compared to related technologies, where the temperature and pressure signals acquired by the temperature and pressure sensors are the temperature and pressure signals of the first chamber after the cell explosion-proof valve is opened, the battery pack provided in this application embodiment, by acquiring and analyzing detection signals in real time, allows the control unit to identify abnormal temperature and pressure conditions more quickly, reducing response time and improving the speed of temperature and pressure identification during battery pack thermal runaway. Through a faster identification and response mechanism, the control unit can take measures more promptly, reducing the safety risks caused by thermal runaway.

[0067] As one feasible implementation method, refer to Figure 2 and Figure 3 As shown, the separator 200 has a second cavity 230.

[0068] The separator 200 has an edge region 210 and a central region 220, with the edge region 210 surrounding the outer periphery of the central region 220; the second cavity 230 is disposed in the central region 220.

[0069] The temperature and pressure sensing element is located in the second cavity 230.

[0070] For example, the second cavity 230 of the separator 200 provides a closed space for the temperature and pressure sensing element, protecting it from direct mechanical shock, vibration and external pressure.

[0071] Meanwhile, the second chamber 230 acts as a barrier to prevent dust, moisture, and other environmental contaminants from entering, keeping the temperature and pressure sensing element clean and dry, thereby improving its reliability. In the event of a leak in the battery cell 100, the second chamber 230 can provide a degree of chemical isolation to prevent corrosion of the temperature and pressure sensing element by the electrolyte or other chemicals.

[0072] Furthermore, the temperature and pressure sensing element may be physically damaged during battery pack assembly and operation. Placing the temperature and pressure sensing element in the second cavity 230 can reduce this risk and extend its service life.

[0073] By placing the temperature and pressure sensing element in the second cavity 230 of the separator 200, the separator 200 provides physical and environmental protection for the temperature and pressure sensing element, ensuring that the temperature and pressure sensing element operates under ideal conditions, thereby improving its sensitivity to temperature and pressure changes.

[0074] Furthermore, the central region 220 is a symmetrical position between adjacent cells 100, enabling it to uniformly sense heat and pressure changes from adjacent cells 100. Since heat and pressure typically diffuse outward from the center of the cell 100, the temperature and pressure sensing element in the central region 220 can detect these changes earlier.

[0075] Meanwhile, the central region 220 is close to the critical parts of the cell 100, allowing for more direct contact with the heat and pressure released by the cell 100. This direct contact enables the detection device to respond more quickly to abnormal changes in the cell 100. In thermal runaway events, heat typically travels along the shortest path. The detection device in the central region 220 is located at a critical position on the thermal path, enabling earlier detection of changes in heat.

[0076] Furthermore, placing the temperature and pressure sensing element in the central region 220 of the separator 200, away from the edge region 210, can reduce interference from the external environment, such as mechanical vibration or external temperature changes, thereby improving the accuracy of the detection.

[0077] By providing a second cavity 230 in the central region 220 of the separator 200, the temperature and pressure detection device can detect abnormal changes in the cell 100 earlier, reducing signal transmission lag. The temperature and pressure detection device is located in a specially designed second cavity 230, reducing interference from the external environment and improving detection accuracy. Earlier detection and response capabilities help the control unit take timely protective measures, such as cutting off power or activating the cooling system, reducing the risk of thermal runaway.

[0078] As one feasible implementation method, the battery cell 100, temperature and pressure detection device, and separator 200 are arranged sequentially along the first direction.

[0079] Along a plane perpendicular to the first direction, the separator 200 has an edge region 210 and a central region 220, with the edge region 210 surrounding the central region 220.

[0080] The two ends of the temperature and pressure detection device are respectively abutted against the central area 220 of the battery cell 100 and the separator 200.

[0081] For example, along the first direction, one end of the temperature and pressure sensing element directly contacts the battery cell 100, enabling faster detection of temperature and pressure changes in the battery cell 100. This direct contact reduces the path and time for heat and pressure transfer, thereby improving the detection response speed. The other end of the temperature and pressure sensing element abuts against the central region 220 of the separator 200, ensuring that it is structurally well supported and fixed, reducing detection errors caused by vibration or movement.

[0082] By placing the temperature and pressure sensor between the battery cell 100 and the separator 200, the temperature and pressure sensor directly contacts the battery cell 100, which can effectively conduct heat and pressure, enabling the control unit to respond to temperature and pressure changes more promptly.

[0083] Furthermore, placing the temperature and pressure sensing element in the central region 220 of the separator 200, away from the edge region 210, can reduce interference from the external environment, such as mechanical vibration or external temperature changes, thereby improving the accuracy of the detection.

[0084] The central region 220 is close to the critical parts of the cell 100, allowing for more direct contact with the heat and pressure released by the cell 100. This direct contact enables the detection device to respond more quickly to abnormal changes in the cell 100. In thermal runaway events, heat typically travels along the shortest path. The detection device in the central region 220 is located at a critical position on the thermal path, enabling earlier detection of changes in heat.

[0085] As one feasible implementation, along a plane perpendicular to the first direction, the separator 200 is provided with a mounting groove on the side near the cell 100; the opening of the mounting groove faces the cell 100.

[0086] Along the first direction, the separator 200 has an edge region 210 and a central region 220, with the edge region 210 surrounding the central region 220; a mounting groove is provided in the central region 220.

[0087] The temperature and pressure sensing element is located in the mounting slot.

[0088] For example, the opening of the mounting slot faces the battery cell 100, allowing the temperature and pressure sensing element to be very close to the battery cell 100, directly sensing changes in the temperature and pressure of the battery cell 100. This arrangement helps improve the response speed and accuracy of the detection. The proximity of the temperature and pressure sensing element to the battery cell 100 effectively conducts heat, enabling the control element to respond to temperature changes promptly.

[0089] Meanwhile, the temperature and pressure sensing element is located in the mounting slot and is physically protected by the separator 200, reducing the direct impact of mechanical shock, vibration, and the external environment. The mounting slot design can shield some external environmental interference, such as electromagnetic interference and temperature fluctuations, improving the stability and accuracy of the detection signal.

[0090] Furthermore, placing the temperature and pressure sensing element in the central region 220 of the separator 200, away from the edge region 210, can reduce interference from the external environment, such as mechanical vibration or external temperature changes, thereby improving the accuracy of the detection.

[0091] The central region 220 is close to the critical parts of the cell 100, allowing for more direct contact with the heat and pressure released by the cell 100. This direct contact enables the detection device to respond more quickly to abnormal changes in the cell 100. In thermal runaway events, heat typically travels along the shortest path. The detection device in the central region 220 is located at a critical position on the thermal path, enabling earlier detection of changes in heat.

[0092] As one possible implementation, the battery pack also includes a transmission component.

[0093] The separator 200 has a connecting cavity, and the two ends of the connecting cavity are connected to the second cavity 230 and the first cavity, respectively.

[0094] The transmission component is located in the connecting cavity, and the control component is located in the first cavity.

[0095] The two ends of the transmission component are electrically connected to the temperature and pressure detection component and the control component, respectively.

[0096] In some embodiments, the control element and the temperature and pressure sensing element are connected by a wire. By providing a connecting cavity in the separator 200, with both ends of the connecting cavity connected to the second cavity 230 and the first cavity respectively, and the transmission element located in the connecting cavity, the signal can be directly transmitted from the temperature and pressure sensing element to the control element, ensuring high efficiency of signal transmission.

[0097] Meanwhile, the transmission component is protected by the separator 200, which reduces the impact of mechanical damage, vibration and external environment on the transmission component.

[0098] Furthermore, by arranging transmission components in the connecting cavity, electromagnetic interference can be effectively reduced, and the stability and accuracy of signal transmission can be improved.

[0099] The design of the connecting cavity and transmission components reduces the complexity of internal wiring in the battery pack, improving the overall design's neatness and reliability. This design facilitates modular manufacturing and maintenance, making battery pack assembly and repair more convenient.

[0100] The transmission component can be a wire, which directly connects the temperature and pressure sensors and the control unit, ensuring that the detection signal can be quickly transmitted to the control unit for timely response. The control unit can acquire the detection signal in real time and quickly take appropriate safety measures as needed, such as cutting off the power supply or activating the cooling system.

[0101] As one feasible implementation, the temperature and pressure sensing element has a transmitting end, and the control element has a receiving end.

[0102] The transmitting end of the temperature and pressure sensing element faces the receiving end of the control element; the receiving end is used to receive the signal transmitted by the transmitting end of the temperature and pressure sensing element.

[0103] In some embodiments, the temperature and pressure sensing element is equipped with an infrared emitter as a transmitting end, so that the temperature and pressure sensing element can convert the detected temperature and pressure data into infrared signals. The control element is equipped with an infrared receiver as a receiving end, so that the control element can receive and decode the infrared signals from the sensing element.

[0104] Infrared signal transmission requires no physical connection, reducing the risk of mechanical wear and electrical short circuits. Simultaneously, infrared signal transmission is fast, enabling real-time data transmission and rapid response. Furthermore, infrared signals have strong resistance to electromagnetic interference over short distances.

[0105] In other embodiments, the temperature and pressure sensor is equipped with an radio frequency transmitter as a transmitting end, so that the temperature and pressure sensor can convert the detected temperature and pressure data into wireless radio frequency signals.

[0106] The control unit is equipped with an RF receiver as the receiving end, so that the control unit can receive and decode RF signals from the detection unit.

[0107] Wireless radio frequency (RF) transmission can cover a greater distance. Furthermore, this RF transmission eliminates the need for physical wire connections, simplifying wiring within the battery pack. In addition, RF signals can efficiently transmit large amounts of data, supporting complex battery management functions.

[0108] In some other embodiments, the temperature and pressure sensing device is equipped with a Bluetooth Low Energy (BLE) module as a transmitter. This module is responsible for converting the detected temperature and pressure data into Bluetooth signals for transmission.

[0109] The control unit is equipped with a Bluetooth receiver module as the receiving end, capable of receiving Bluetooth signals from the temperature and pressure sensors. The receiving module transmits the received signals to the data processing unit for data decoding and analysis, in order to perform battery management and safety control.

[0110] In this way, the temperature and pressure detection device collects the temperature and pressure data of the battery cell 100 in real time and packages the data into a Bluetooth signal via the Bluetooth transmitter module. After receiving the signal, the Bluetooth receiver module of the control unit transmits it to the data processing unit for decoding and analysis. Based on the received data, the control unit can monitor the battery status in real time and take corresponding safety measures when an anomaly is detected, such as alarm, power cut-off, or activation of the cooling system.

[0111] The battery pack provided in this application embodiment reduces the wiring requirements inside the battery pack and improves design simplicity by setting a transmitter on the temperature and pressure detection device and a receiver on the control device, and using the transmitter and receiver for signal transmission. This method allows signal transmission without the use of wires.

[0112] At the same time, the absence of physical wire connections reduces the risk of connection damage due to mechanical wear or vibration. Wireless or optical transmission methods reduce physical contact points, potentially improving the durability and reliability of the battery pack system.

[0113] As one possible implementation, the material of the separator 200 includes aerogel or foam.

[0114] In some embodiments, the separator 200 is made of aerogel. The low thermal conductivity of aerogel makes it suitable for use in battery packs to prevent heat transfer between the cells 100, thereby reducing the risk of thermal runaway. Simultaneously, the extremely low density of aerogel can significantly reduce the weight of the battery pack. Furthermore, aerogel has fire-retardant properties, providing additional safety protection under high-temperature conditions.

[0115] In other embodiments, the aerogel material is foam, which has elasticity and cushioning properties, absorbing vibration and shock, and protecting the battery cell 100 and other components from mechanical damage. Simultaneously, the foam material typically also has some thermal insulation properties, helping to control the temperature distribution inside the battery pack.

[0116] Furthermore, foam materials are typically lightweight and inexpensive, making them suitable for mass production and application. Foam materials are easy to cut and shape, facilitating processing and installation during the design and assembly of battery packs.

[0117] As one possible implementation, the battery pack also includes a buzzer; the buzzer is disposed on the outer periphery of the housing.

[0118] The buzzer and control unit are electrically connected; the buzzer is used to issue alarm information.

[0119] For example, the buzzer is electrically connected to the controller, so that the controller can activate the buzzer as needed.

[0120] The buzzer is located on the outer periphery of the battery pack housing. This placement helps ensure effective sound propagation, allowing users to hear the alarm signal promptly.

[0121] The control unit monitors parameters such as temperature and pressure within the battery pack in real time. By receiving signals from temperature and pressure sensors, it determines the battery pack's status. When an abnormality is detected (such as overheating, overpressure, or other potential hazards), the control unit triggers a buzzer to issue an alarm signal. The buzzer is used to provide an audible alarm, alerting the user to potential safety hazards related to the battery pack.

[0122] With the sound alarm, users can be notified of any abnormalities in the battery pack immediately, allowing them to take necessary safety measures to prevent accidents.

[0123] As one feasible implementation, the temperature and pressure detection device includes a temperature sensor and a pressure sensor.

[0124] For example, a temperature sensor is used to monitor temperature changes between adjacent cells 100 in real time. The temperature sensor includes a thermocouple, a thermistor, and a semiconductor temperature sensor.

[0125] Pressure sensors are used to detect pressure changes between adjacent cells 100 to identify potential expansion or leakage. Pressure sensors include piezoresistive, piezoelectric, and capacitive sensors.

[0126] By setting temperature and pressure sensors separately, their types and sensitivities can be optimized individually. The locations of the temperature and pressure sensors can be flexibly arranged according to the battery pack design and space constraints.

[0127] As one feasible implementation, the temperature and pressure sensing element includes a thermo-pressure composite sensor. This sensor integrates temperature and pressure detection functions into a single sensor device. It can simultaneously monitor temperature and pressure and transmit the data through a single output interface. By incorporating a thermo-pressure composite sensor, the number of sensors and wiring complexity are reduced, simplifying battery pack design and assembly. In space-constrained applications, the composite sensor can effectively save space. The integrated design may also reduce material and manufacturing costs.

[0128] Secondly, embodiments of this application provide an electrical device, including a battery pack.

[0129] It is understood that since the electrical equipment of this application adopts the technical solution of the above-described battery pack embodiment, it has at least the beneficial effects brought about by the technical solution of the above-described battery pack embodiment, which will not be elaborated here.

[0130] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0131] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, include: The shell has a first cavity; Multiple battery cells (100) are located in the first cavity, and the multiple battery cells (100) are arranged sequentially along a first direction; A separator (200) is disposed between adjacent cells (100); A temperature and pressure detection device is disposed between adjacent battery cells (100); A control component is electrically connected to the temperature and pressure detection component; the control component is used to acquire the detection signal from the temperature and pressure detection component.

2. The battery pack according to claim 1, characterized in that, The partition (200) has a second cavity (230); The separator (200) has an edge region (210) and a central region (220), the edge region (210) surrounding the outer periphery of the central region (220); the second cavity (230) is disposed in the central region (220). The temperature and pressure detection element is located in the second cavity (230).

3. The battery pack according to claim 1, characterized in that, Along the first direction, the battery cell (100), the temperature and pressure detection device, and the separator (200) are arranged sequentially; Along a plane perpendicular to the first direction, the separator (200) has an edge region (210) and a central region (220), the edge region (210) surrounding the central region (220); The two ends of the temperature and pressure detection element are respectively in contact with the central area (220) of the battery cell (100) and the separator (200).

4. The battery pack according to claim 1, characterized in that, Along the first direction, the separator (200) is provided with a mounting groove on the side near the battery cell (100); the opening of the mounting groove faces the battery cell (100). Along a plane perpendicular to the first direction, the separator (200) has an edge region (210) and a central region (220), the edge region (210) surrounding the central region (220); the mounting groove is disposed in the central region (220). The temperature and pressure sensing element is located in the mounting groove.

5. The battery pack according to claim 2, characterized in that, It also includes transmission components; The separator (200) has a connecting cavity, and the two ends of the connecting cavity are respectively connected to the second cavity (230) and the first cavity; The transmission component is located in the connection cavity, and the control component is located in the first cavity; The two ends of the transmission component are electrically connected to the temperature and pressure detection component and the control component, respectively.

6. The battery pack according to any one of claims 1-4, characterized in that, The temperature and pressure detection device has a transmitting end, and the control device has a receiving end; The transmitting end of the temperature and pressure detection device faces the receiving end of the control device; the receiving end is used to receive the signal transmitted by the transmitting end of the temperature and pressure detection device.

7. The battery pack according to any one of claims 1-4, characterized in that, The material of the separator (200) includes aerogel or foam.

8. The battery pack according to any one of claims 1-4, characterized in that, It also includes a buzzer; the buzzer is disposed on the outer periphery of the housing; The buzzer and the control unit are electrically connected; the buzzer is used to issue alarm information.

9. The battery pack according to any one of claims 1-4, characterized in that, The temperature and pressure detection device includes a temperature sensor and a pressure sensor; And / or, the temperature and pressure detection device includes a temperature and pressure composite sensor.

10. An electrical appliance, characterized in that, The battery pack includes any one of claims 1-9.

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