A battery module device, energy storage system and vehicle

Abstract

The application provides a battery module device, an energy storage system and a vehicle, and relates to the technical field of batteries. The battery module device comprises a battery pack shell, a battery assembly comprising a plurality of battery modules, the battery modules being installed in the battery pack shell, the battery modules comprising a plurality of battery cells, a sensor assembly comprising a first pressure sensor, a second pressure sensor and a humidity sensor, the first pressure sensor and the humidity sensor being arranged inside the battery pack shell, and the second pressure sensor being arranged outside the battery pack shell, and a battery management unit, the battery management unit being electrically connected with the battery cells, the first pressure sensor, the second pressure sensor and the humidity sensor. The battery module device can achieve the technical effect of reducing the risk of triggering battery thermal runaway safety.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery module device, an energy storage system, and a vehicle. Background Technology

[0002] Currently, as the market share of new energy vehicles gradually increases, the safety performance of power battery packs, which are the core power source of new energy vehicles, is receiving increasing attention. The development of battery safety technology is also gradually transitioning from passive protection to active protection.

[0003] In everyday driving scenarios, cars often travel on uneven roads. When drivers see poor road conditions, they may lack confidence and, despite driving carefully, the battery pack may still bump against the bottom. In such cases, the driver may feel that the battery pack has been bumped, but currently, none of the functions in new energy vehicles provide a way to confirm whether a bump will affect battery safety, nor can the extent of the bump be quantified. If the battery pack has already leaked, continuing to drive normally could, in extreme cases, lead to water entering the battery pack, potentially triggering a thermal runaway safety risk. Utility Model Content

[0004] The purpose of this application is to provide a battery module device, energy storage system and vehicle that can achieve the technical effect of reducing the safety risk of triggering battery thermal runaway.

[0005] In a first aspect, this application provides a battery module device, comprising: Battery pack casing; A battery assembly includes multiple battery modules, which are installed within the battery pack housing. Each battery module includes multiple battery cells. The sensor assembly includes a first pressure sensor, a second pressure sensor, and a humidity sensor, wherein the first pressure sensor and the humidity sensor are disposed inside the battery pack housing, and the second pressure sensor is disposed outside the battery pack housing; A battery management unit is electrically connected to the battery cell, the first pressure sensor, the second pressure sensor, and the humidity sensor.

[0006] In the above implementation process, the battery module device is equipped with a first pressure sensor and a humidity sensor inside the battery pack housing, and a second pressure sensor outside the battery pack housing. The first pressure sensor and the second pressure sensor can detect the internal pressure of the battery pack and the external environmental pressure, respectively. The humidity sensor can detect the internal humidity of the battery pack housing, thereby realizing the function of detecting the airtightness of the battery pack based on the internal humidity, internal pressure and external environmental pressure. It can sense and quantify the degree of battery pack leakage, thereby achieving the technical effect of reducing the safety risk of triggering battery thermal runaway.

[0007] Furthermore, the sensor assembly also includes an onboard pressure sensing chip, which is disposed on the battery management unit and electrically connected to the battery management unit.

[0008] In the above implementation process, the pressure change inside the battery pack housing can be monitored in real time through the onboard pressure sensing chip. The pressure data inside the battery pack housing detected by the first pressure sensor is compared and backed up to ensure the reliability of the internal pressure detection of the battery pack housing.

[0009] Furthermore, the battery module also includes an explosion-proof valve, which is disposed in the battery cell.

[0010] In the above implementation process, by installing an explosion-proof valve on the battery cell, when the internal pressure of the battery cell rises abnormally to a dangerous level, the valve can be actively ruptured or opened to quickly release the internal pressure and gas, thereby preventing the battery cell from exploding more violently.

[0011] Furthermore, the battery module device also includes a vent valve, which is disposed on the battery pack housing.

[0012] In the above implementation process, a vent valve is installed on the battery pack housing. Under normal circumstances, it is sealed to prevent water and dust. Under abnormal circumstances, it can release pressure. For example, in the event of thermal runaway, the internal pressure of the battery pack housing can be released through the vent valve to ensure safety.

[0013] Furthermore, the battery module device also includes a connector harness assembly, which includes multiple connector harnesses. The battery management unit is electrically connected to the battery cell, the first pressure sensor, the second pressure sensor, and the humidity sensor through the connector harnesses.

[0014] In the above implementation process, the battery management unit is electrically connected to the battery cell, the first pressure sensor, the second pressure sensor, and the humidity sensor through connector wiring harnesses to ensure normal signal transmission.

[0015] Furthermore, the battery module device also includes a vehicle controller, which is electrically connected to the battery management unit.

[0016] In the above implementation process, the vehicle controller is connected to the battery management unit. The internal pressure data, external environmental pressure data and internal humidity data of the battery pack housing obtained by the battery management unit are transmitted to the vehicle controller, which makes the final decision and processing to ensure the normal operation of the battery module device.

[0017] Furthermore, the battery module device also includes a wireless data transmission unit, and the vehicle controller is electrically connected to the wireless data transmission unit.

[0018] In the above implementation process, the vehicle controller is electrically connected to the wireless data transmission unit, and the wireless data transmission unit is wirelessly connected to the cloud big data platform. Thus, the cloud big data platform can receive the internal pressure data, external environmental pressure data, and internal humidity data uploaded by the vehicle controller and monitor them in the big data background.

[0019] Furthermore, the battery module device also includes a copper busbar connector, through which multiple battery cells in the battery module are connected.

[0020] In the above process, the large current of the battery cells is carried by the copper busbar connectors, and the energy of each battery cell is collected to achieve efficient and reliable connection between the battery cells.

[0021] Secondly, this application provides an energy storage system including the battery module device described in any one of the first aspects.

[0022] Thirdly, this application provides a vehicle including the battery module device described in any of the first aspects.

[0023] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0024] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the battery module device provided in the embodiments of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0032] Generally, as the market share of new energy vehicles gradually increases, the safety performance of the power battery pack, as the core power source of new energy vehicles, is receiving increasing attention. The development of battery safety technology is also gradually transitioning from passive protection to active protection. In daily driving scenarios, cars often travel on uneven roads. Drivers, seeing poor road conditions, may lack confidence and, despite driving cautiously, the battery pack can still easily scrape against the bottom. In such cases, the driver can feel that the battery pack may have been impacted, but currently, none of the functions in new energy vehicles provide a way to confirm whether an impact will affect battery safety, nor can the severity of the impact be quantified. If the battery pack has already leaked, continuing to drive normally could, in extreme cases, lead to water ingress into the battery pack, potentially triggering a thermal runaway safety risk.

[0033] To address the aforementioned technical problems, embodiments of this application provide a battery module device, an energy storage system, and a vehicle. The battery module device has a first pressure sensor and a humidity sensor installed inside the battery pack housing, and a second pressure sensor installed outside the battery pack housing. The first and second pressure sensors can detect the internal pressure of the battery pack and the external environmental pressure, respectively, while the humidity sensor can detect the internal humidity of the battery pack housing. This enables the detection of the battery pack's airtightness based on internal humidity, internal pressure, and external environmental pressure, allowing for the perception and quantification of the degree of battery pack leakage, thereby reducing the technical risk of triggering battery thermal runaway.

[0034] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a battery module device provided in an embodiment of this application. The battery module device includes: Battery pack casing 100; The battery assembly 200 includes multiple battery modules, which are installed inside the battery pack housing 100. Each battery module includes multiple battery cells. The sensor assembly 300 includes a first pressure sensor 310, a second pressure sensor 320, and a humidity sensor 330. The first pressure sensor 310 and the humidity sensor 330 are disposed inside the battery pack housing 100, and the second pressure sensor 320 is disposed outside the battery pack housing 100. The battery management unit 400 is electrically connected to the battery cell, the first pressure sensor 310, the second pressure sensor 320, and the humidity sensor 330.

[0035] For example, the battery pack housing 100 is an insulating and sealed housing, in which the battery cells in the battery assembly 200 are installed, thereby protecting the battery cells; For example, the battery assembly 200 includes multiple battery modules, which can be connected in parallel or in series. In this embodiment, the multiple battery modules of the battery assembly 200 are connected in a suitable circuit according to actual needs, such as in parallel, in series, or in a hybrid series / parallel connection, which is described herein as an example and not a limitation.

[0036] In some implementations... Figure 1 The number of battery modules shown is 12, meaning the battery modules include module 1, module 2, module 3, ..., module 12; it should be noted that... Figure 1 The number of battery modules shown is for illustrative purposes only and is not a limitation. The number of battery modules in battery assembly 200 can be set according to actual needs and is not limited to 12 modules.

[0037] For example, each battery module may include multiple battery cells; for example, in Figure 1 The battery module assembly shown contains 12 battery modules, each module comprising two battery cells, meaning the entire battery pack consists of 24 battery cells: T1, T2, T3, ..., T23, T24; it should be noted that... Figure 1 The number of battery cells in the battery module shown is for illustrative purposes only and is not a limitation. The number of battery cells in each battery module can be set according to actual needs and is not limited to two battery cells.

[0038] In some embodiments, a battery cell refers to a single battery unit, that is, a single, independently packaged basic unit with positive and negative electrodes capable of converting chemical energy into electrical energy; optionally, a battery cell can be a cylindrical battery, a prismatic hard-case battery, or a pouch battery, etc., which are only examples and not limitations; wherein: Cylindrical batteries have a high degree of standardization, good consistency in mechanized production, relatively low cost, and high structural strength, but require a large number of supports and connectors when assembled, resulting in relatively low space utilization. Square hard-shell batteries, which are shaped like a rigid square shell of aluminum or steel, have high space utilization and good structural strength. They can accommodate more active materials in volume, thus providing higher energy density. They are neatly arranged in the module and are currently the most widely used type in the electric vehicle field. Soft-pack batteries use aluminum-plastic film as the outer shell, making them lighter, more flexible in shape design, and capable of achieving the highest energy density. In terms of safety, they usually bulge rather than explode suddenly when thermal runaway occurs. However, they have poor mechanical strength, require high standards for assembly technology and structural protection, and are relatively prone to leakage.

[0039] For example, the sensor assembly 300 includes a first pressure sensor 310, a second pressure sensor 320, and a humidity sensor 330, wherein the first pressure sensor 310 and the humidity sensor 330 are disposed inside the battery pack housing 100, and the second pressure sensor 320 is disposed outside the battery pack housing 100; thereby, the first pressure sensor 310 detects the internal pressure of the battery pack housing 100, the second pressure sensor 320 detects the external environmental pressure of the battery pack housing 100, and the humidity sensor 330 detects the internal humidity of the battery pack housing 100; by combining and comparing the changes in the internal pressure data, external environmental pressure data, and internal humidity data of the battery pack housing 100, it can be determined whether the battery pack housing 100 has leaked.

[0040] In some implementations, the detection principle for leakage caused by battery pack impact is based on the change in air pressure within the sealed cavity of the battery pack. For example, according to the internal pressure data of the battery pack housing 100 detected by the first pressure sensor 310, if the rate of change of the internal pressure data exceeds the change threshold (limited according to the actual situation or according to the test calibration), it indicates that the battery pack housing 100 may be leaking, resulting in a significant decrease in the internal pressure of the battery pack housing 100. At this time, an alarm message can be issued to the user to warn of a malfunction in the battery module device.

[0041] For example, by detecting the external environmental pressure data of the battery pack housing 100 through the second pressure sensor 320, the second pressure sensor 320 can be installed in an area outside the battery pack housing 100 that is less affected by airflow (such as inside the passenger compartment of the vehicle or in a cavity designed with static pressure) and used as a reference for comparing the internal and external pressures of the battery pack housing 100. For example, if the difference between the internal pressure data of the battery pack housing 100 and the external environmental pressure data of the battery pack housing 100 is less than or equal to the pressure threshold (limited according to the actual situation or according to the test calibration), it indicates that the internal pressure of the battery pack housing 100 and the external environmental pressure are similar, and there is a possibility of leakage in the battery pack housing 100. At this time, it is also necessary to issue an alarm message to the user to warn that the battery module device has malfunctioned.

[0042] For example, the humidity sensor 330 detects the internal humidity of the battery pack housing 100 to obtain the internal humidity data of the battery pack housing 100. If the internal air humidity of the battery pack housing 100 is too high, the gas may undergo a phase change (e.g., condensation), which will cause a severe impact on the internal pressure of the battery pack and increase the possibility of battery pack leakage. Therefore, if the internal humidity data of the battery pack housing 100 is greater than the humidity threshold (limited according to the actual situation or according to the test calibration), an alarm message needs to be issued to the user to warn that the battery module device has malfunctioned.

[0043] For example, the battery management unit 400 is electrically connected to the battery cell, the first pressure sensor 310, the second pressure sensor 320, and the humidity sensor 330, respectively. It can collect module temperature data of each battery module in the battery pack housing 100, internal pressure data of the battery pack housing 100, external environmental pressure, and internal humidity data. Based on the module temperature data, internal pressure data, external environmental pressure, and internal humidity data, it can determine whether the battery module device has a leakage fault.

[0044] For example, the battery module integrates a temperature detection device that can detect the current module temperature data and send the module temperature data to the battery management unit.

[0045] In some implementations, if the module temperature data of the battery module exceeds the temperature threshold (limited according to the actual situation or according to the test calibration), it indicates that the battery module device has thermal runaway, and a thermal runaway alarm message needs to be issued to the user to warn of the thermal runaway fault of the battery module device.

[0046] For example, the battery management unit in this application embodiment may be a battery management system (BMS), which realizes various functions such as sensing, monitoring, managing, protecting and controlling the battery component 200.

[0047] The battery module device provided in this application embodiment has a first pressure sensor 310 and a humidity sensor 330 installed inside the battery pack housing 100, and a second pressure sensor 320 installed outside the battery pack housing 100. The first pressure sensor 310 and the second pressure sensor 320 can detect the internal pressure of the battery pack and the external environmental pressure, respectively, and the humidity sensor 330 can detect the internal humidity of the battery pack housing. This enables the function of detecting the airtightness of the battery pack based on the internal humidity, internal pressure and external environmental pressure, and can sense and quantify the degree of battery pack leakage, thereby achieving the technical effect of reducing the safety risk of triggering battery thermal runaway.

[0048] In some embodiments, the sensor assembly 300 further includes an onboard pressure sensing chip 340, which is disposed in the battery management unit 400 and electrically connected to the battery management unit 400.

[0049] For example, the onboard pressure sensing chip 340 can monitor the pressure changes inside the battery pack housing 100 in real time, and compare and back up the internal pressure data of the battery pack housing 100 detected by the first pressure sensor 310, so as to ensure the reliability of the internal pressure detection of the battery pack housing 100.

[0050] For example, the onboard pressure sensing chip 340 is a miniature sensor integrated on the printed circuit board of the battery management system, specifically designed to monitor pressure changes inside the battery pack or cell in real time, providing the battery management system with a fourth key dimension of data in addition to voltage, current, and temperature, and achieving at least the following effects: Early warning and detection of thermal runaway: When a battery cell is about to experience or is experiencing thermal runaway, a large amount of flammable gas is generated inside, causing a sharp increase in internal pressure. Pressure sensors typically respond faster than temperature sensors because they can detect internal chemical reactions and gas production much earlier. This buys the system critical escape or response time (from a few minutes to tens of minutes). Monitoring battery health: During normal cycling, battery cells will also produce slight gas, causing the internal pressure to rise slowly. By monitoring the long-term trend of pressure changes, the battery's degradation and health status can be assessed. Detecting physical deformation of batteries: For aluminum or steel-cased batteries, external impacts or internal short circuits may cause the battery to swell (slight deformation); pressure sensors can detect these minute pressure changes. Sealing performance testing: During the production or maintenance of battery packs, pressure testing can be used to verify the sealing performance of battery packs or modules.

[0051] In some implementations, the battery module also includes an explosion-proof valve disposed within the battery cell.

[0052] For example, by installing an explosion-proof valve on the battery cell, when the internal pressure of the battery cell rises abnormally to a dangerous level, the internal pressure and gas can be quickly released by actively rupturing or opening, thereby preventing a more violent explosion of the battery cell.

[0053] In some embodiments, the battery module assembly further includes a vent valve disposed on the battery pack housing 100.

[0054] For example, a vent valve is provided on the battery pack housing 100. Under normal circumstances, it is sealed and can be waterproof and dustproof. Under abnormal circumstances, it can release pressure. For example, in the event of thermal runaway, the internal pressure of the battery pack housing 100 can be released through the vent valve to ensure safety.

[0055] For example, the vent valve is installed on the upper part of the battery pack housing 100, which can utilize the physical property of hot gas rising to achieve rapid and effective venting and reduce electrolyte leakage; at the same time, the vent valve, in conjunction with the directional discharge design, can ensure that the discharged gas is directed to a safe area.

[0056] Alternatively, the vent valve can be installed on the top cover of the battery pack housing 100, which can achieve the following effects: Taking advantage of the properties of gases, the hot gas generated by thermal runaway has a low density and will naturally rise; installing the vent valve at the top can ensure that the high-temperature flammable gas can be discharged from the package in the fastest and most effective way in the event of pressure relief. To prevent electrolyte leakage, which is caused by the liquid electrolyte inside the battery, installing the valve at the top minimizes electrolyte leakage while releasing gas. If installed on the side or bottom, the electrolyte is more likely to leak under gravity, causing secondary damage (such as short circuits or corrosion). To prevent the intrusion of foreign objects, the top installation position is relatively less likely to come into contact with road surface water, dust and mud, reducing the risk of clogging or corrosion.

[0057] In some embodiments, the battery module device further includes a connector harness assembly 500, which includes a plurality of connector harnesses. The battery management unit 400 is electrically connected to the battery cell, the first pressure sensor, the second pressure sensor, and the humidity sensor respectively through the connector harnesses.

[0058] For example, the battery management unit 400 is electrically connected to the battery cell, the first pressure sensor, the second pressure sensor, and the humidity sensor respectively through connector wiring harnesses to ensure normal signal transmission.

[0059] In some embodiments, the battery module device further includes a vehicle controller 600, which is electrically connected to the battery management unit 400.

[0060] For example, the vehicle controller 600 is connected to the battery management unit 400, and the internal pressure data, external environmental pressure data and internal humidity data of the battery pack housing 100 obtained by the battery management unit 400 are transmitted to the vehicle controller 600. The vehicle controller makes the final decision and processing to ensure the normal operation of the battery module device.

[0061] For example, the battery module device is used in electric vehicles; the vehicle control unit (VCU), as the core control center of the electric vehicle, is equivalent to the "president" or "commander" of the vehicle, responsible for coordinating and managing all subsystems to realize the driver's intentions and ensure the vehicle operates efficiently and safely.

[0062] In some embodiments, the battery module device further includes a wireless data transmission unit 700, and the vehicle controller 600 is electrically connected to the wireless data transmission unit 700.

[0063] For example, the vehicle controller 600 is electrically connected to the wireless data transmission unit 700, and the wireless data transmission unit 700 is wirelessly connected to the cloud big data platform 800. Thus, the cloud big data platform 800 can receive internal pressure data, external environmental pressure data, and internal humidity data uploaded by the vehicle controller 600 and monitor them in the big data background.

[0064] For example, the cloud-based big data platform 800 can also combine the vehicle's geographical location to send reference altitude pressure to the vehicle end for environmental reference pressure verification.

[0065] In some embodiments, the battery module assembly also includes copper busbar connectors, through which multiple battery cells in the battery module are connected.

[0066] For example, the large current of the battery cells is carried by copper busbar connectors, which gather the energy of each battery cell and realize an efficient and reliable connection between the battery cells.

[0067] In some embodiments, this application provides an energy storage system, including... Figure 1 The battery module device shown.

[0068] In some embodiments, this application provides a vehicle, including... Figure 1 The battery module device shown.

[0069] Optionally, the battery module device provided in this application can also be applied to electric ships, electric vehicles, energy storage and other fields, and is only used as an example and not as a limitation.

[0070] In some implementation scenarios, the battery module device provided in this application embodiment can be used as a vehicle battery pack collision and leakage detection system. This system can add the function of detecting the airtightness of the battery pack during the entire life cycle of the vehicle, allowing car owners and manufacturers to perceive and quantify the degree of battery pack leakage, and take corresponding measures for safety hazards in advance, which has high engineering application value. To address the issue of the inability to detect and quantify impact leaks in the on-board battery packs of new energy vehicles throughout their operational lifecycle, the battery module device provided in this application is illustrated in the following specific implementation examples: Step 1: The system includes a complete conventional vehicle power battery pack, including but not limited to battery modules, high-voltage devices, battery management system, low-voltage connector harness, copper busbar, explosion-proof valve, vent valve, etc. Step 2: The system includes a vehicle controller and a cloud-based big data platform; Step 3: This indicates the sealed cavity inside the battery pack. The principle of battery pack impact detection is to observe the changes in air pressure inside the sealed cavity of the battery pack. Step 4: Add a pressure sensor inside the battery pack or an onboard pressure sensing chip on the BMS board to detect pressure changes in the sealed cavity inside the battery pack. Step 5: Add a battery pack external environment reference pressure sensor, which is installed in an area outside the battery pack that is less affected by airflow (such as inside the passenger compartment of the vehicle or in a cavity designed with static pressure) to be used as a reference for comparing the pressure inside and outside the battery pack; Step 6: Add an internal humidity sensor RH to detect the relative humidity RH inside the battery pack; if the air humidity inside the battery pack is too high, the gas may undergo a phase change (condensation), which will drastically affect the pressure inside the battery pack. Step 7: The BMS collects the temperature of all modules T1~T24 in the battery pack, adds a pressure sensor 5 inside the battery pack or a pressure sensing chip 4 on the BMS board, and adds an internal humidity sensor RH signal; the vehicle controller collects the reference pressure sensor of the external environment of the battery pack. Step 8: The cloud-based big data platform receives all the signals collected in Step 7 from the vehicle and monitors them in the big data backend. In addition, the cloud-based big data platform can also combine the vehicle's geographical location to send reference altitude pressure to the vehicle for environmental reference pressure verification. Throughout the vehicle's operational lifecycle, this system can detect changes in gas pressure and relative humidity within the battery pack in real time under specific scenarios, and calculate based on the rate of change to achieve quantitative identification of battery pack impact leaks.

[0071] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0072] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0073] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A battery module device, characterized in that, include: Battery pack casing; A battery assembly includes multiple battery modules, which are installed within the battery pack housing. Each battery module includes multiple battery cells. The sensor assembly includes a first pressure sensor, a second pressure sensor, and a humidity sensor, wherein the first pressure sensor and the humidity sensor are disposed inside the battery pack housing, and the second pressure sensor is disposed outside the battery pack housing; A battery management unit is electrically connected to the battery cell, the first pressure sensor, the second pressure sensor, and the humidity sensor.

2. The battery module device according to claim 1, characterized in that, The sensor assembly also includes an onboard pressure sensing chip, which is disposed on the battery management unit and electrically connected to the battery management unit.

3. The battery module device according to claim 1, characterized in that, The battery module also includes an explosion-proof valve, which is disposed in the battery cell.

4. The battery module device according to claim 1 or 3, characterized in that, The battery module device also includes a vent valve, which is disposed on the battery pack housing.

5. The battery module device according to claim 1, characterized in that, The battery module device further includes a connector harness assembly, which includes multiple connector harnesses. The battery management unit is electrically connected to the battery cell, the first pressure sensor, the second pressure sensor, and the humidity sensor through the connector harnesses.

6. The battery module device according to claim 1, characterized in that, The battery module device also includes a vehicle controller, which is electrically connected to the battery management unit.

7. The battery module device according to claim 6, characterized in that, The battery module device also includes a wireless data transmission unit, and the vehicle controller is electrically connected to the wireless data transmission unit.

8. The battery module device according to claim 7, characterized in that, The battery module device also includes a copper busbar connector, through which multiple battery cells in the battery module are connected.

9. An energy storage system, characterized in that, Includes the battery module device according to any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the battery module device according to any one of claims 1 to 8.

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