Structure for arranging smoke sensor in battery system PACK

Abstract

The utility model discloses a structure for arranging a smoke sensor in a battery system PACK, which comprises a battery pack, the battery pack is provided with the smoke sensor and an explosion-proof valve, the smoke sensor is provided with at least one through hole, the through hole is positioned on the side surface, far away from the battery pack, of the smoke sensor, and the explosion-proof valve is arranged on the battery pack. The distance between the smoke sensor and the anti-explosion valve is A, and A is not smaller than 200 mm. According to the utility model, the smoke sensor is arranged at the shortest distance of the explosion-proof valve, so that the accuracy and response speed of smoke detection are improved, and the safety of a battery system is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle energy storage systems, in particular to a structure in which a smoke sensor is arranged in a battery system PACK. Background Art

[0002] With the rapid development of applications such as electric vehicles and energy storage systems, the safety of battery systems and packs is gaining increasing attention. Smoke is a potential danger signal within a battery system, and timely and accurate smoke detection is crucial for preventing accidents such as thermal runaway and fire. Explosion-proof valves are crucial safety features in battery systems. When internal pressure in a battery becomes excessively high, the valve quickly opens to release the pressure, preventing explosion.

[0003] Currently, the placement of smoke sensors in many battery system packs is suboptimal, often far from explosion-proof valves. This results in smoke sensors failing to detect smoke promptly and accurately when it appears inside the battery system, delaying safety warning responses. Furthermore, due to the uneven and complex nature of smoke diffusion, smoke concentrations can be lower at locations farther from the explosion-proof valve, further complicating smoke detection. Utility Model Content

[0004] In response to the above-mentioned problems of the existing CC, the present invention aims to provide a structure for arranging a smoke sensor in the battery system PACK of DD. By arranging the smoke sensor at the closest distance to the explosion-proof valve, the accuracy and response speed of smoke detection are improved, thereby enhancing the safety of the battery system.

[0005] The specific technical solutions are as follows:

[0006] A structure for arranging a smoke sensor in a battery system PACK includes: a battery pack, on which a smoke sensor and an explosion-proof valve are mounted, the smoke sensor having at least one through hole, the through hole being located on a side of the smoke sensor away from the battery pack, and the distance between the smoke sensor and the explosion-proof valve being A, which is not less than 20 mm.

[0007] The above-mentioned battery system PACK is provided with a smoke sensor structure, wherein the smoke sensor is fixedly mounted on the battery pack via a bracket.

[0008] In the above-mentioned battery system PACK with a smoke sensor, the bracket is fixedly connected to the battery pack via at least two first fasteners, and the smoke sensor is fixedly connected to the bracket via at least two second fasteners.

[0009] In the above-mentioned battery system PACK structure in which the smoke sensor is arranged, the first fastener is a bolt, and the second fastener is a rivet bolt.

[0010] The above-mentioned battery system PACK is equipped with a smoke sensor structure, wherein the bracket includes a first mounting plate, a support plate and a second mounting plate connected in sequence, the first mounting plate is fixedly connected to the battery pack through the first fastener, and the second mounting plate is fixedly connected to the smoke sensor through the second fastener.

[0011] In the above-mentioned structure of the battery system PACK with the smoke sensor arranged therein, there is a gap between the second mounting plate and the side wall of the battery pack.

[0012] In the above-mentioned battery system PACK structure in which the smoke sensor is arranged, the support plate is perpendicular to the first mounting plate and the second mounting plate respectively, and the first mounting plate is parallel to the second mounting plate.

[0013] The battery system PACK with the smoke sensor structure further includes a battery management system, which is signal-connected to the smoke sensor and transmits and processes smoke data between the battery management system and the smoke sensor in real time.

[0014] The battery system PACK is equipped with a smoke sensor, and further includes an alarm module. The battery management system is signal-connected to the alarm module. The battery management system has a smoke alarm threshold. When the smoke sensor detects that the smoke data exceeds the smoke alarm threshold, the alarm module sounds an alarm.

[0015] Compared with the prior art, the above technical solution has the following positive effects:

[0016] The utility model determines the optimal arrangement position of the smoke sensor near the explosion-proof valve by the shortest distance between the smoke sensor and the explosion-proof valve, thereby ensuring that the smoke sensor can detect the smoke released by the explosion-proof valve at the earliest possible time;

[0017] The utility model fixes the smoke sensor at a certain position, and the through hole is located on the side of the smoke sensor away from the battery pack, so the through hole will not be blocked, ensuring the stability and reliability of the smoke sensor during the operation of the battery system and improving the service life of the battery system PACK;

[0018] The utility model connects the smoke sensor with the battery management system signal to realize real-time transmission and processing of smoke data. When the smoke sensor detects smoke, the smoke data is promptly transmitted to the battery management system for analysis and processing. When the smoke concentration exceeds the threshold, the alarm module sends an alarm signal to remind the operator to take timely countermeasures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a battery system PACK with a smoke sensor arranged therein according to the present invention;

[0020] Figure 2 The utility model is a battery system PACK arranging a smoke sensor structure Figure 1 A partial enlarged view of the

[0021] Figure 3 A schematic diagram of the structure of a smoke sensor and a bracket for arranging a smoke sensor in a battery system PACK according to the present invention;

[0022] Figure 4 A schematic diagram of the structure of a smoke sensor and a bracket for arranging a smoke sensor in a battery system PACK according to the present invention;

[0023] Figure 5 A side view of the structure of a smoke sensor and a bracket for arranging a smoke sensor in a battery system PACK according to the present invention;

[0024] Figure 6 This is a test result diagram of a smoke sensor in a battery pack of a battery system PACK according to the present invention;

[0025] Figure 7 This is a test result diagram of a smoke sensor in a battery pack of a battery system PACK according to the present invention;

[0026] In the accompanying drawings: 1. battery pack; 2. smoke sensor; 3. explosion-proof valve; 4. through hole; 5. bracket; 6. first fastener; 7. second fastener; 8. gap; 51. first mounting plate; 52. support plate; 53. second mounting plate. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0028] like Figures 1 to 7 As shown, a preferred embodiment of a battery system PACK with a smoke sensor is shown, comprising: a battery pack 1, on which a smoke sensor 2 and an explosion-proof valve 3 are mounted, the smoke sensor 2 having at least one through hole 4, the through hole 4 being located on the side of the smoke sensor 2 away from the battery pack 1, and the distance between the smoke sensor 2 and the explosion-proof valve 3 being A, which is not less than 20 mm.

[0029] from Figure 6From the conclusion, it can be concluded that 13 minutes after the smoke sensor 2 gave an early warning, the smoke pressure suddenly became too high and rushed out of the explosion-proof valve 3.

[0030] Preferably, the smoke sensor 2 has two through holes 4 .

[0031] Preferably, the two through holes 4 are respectively located on the upper and lower sides of the smoke sensor 2 and are arranged opposite to each other.

[0032] The utility model determines the optimal arrangement position of the smoke sensor 2 near the explosion-proof valve 3 through the shortest distance between the smoke sensor 2 and the explosion-proof valve 3, ensuring that the smoke sensor 2 can detect the smoke released by the explosion-proof valve 3 at the earliest.

[0033] The utility model fixes the smoke sensor 2 at a certain position, and the through hole 4 is located on the side of the smoke sensor 2 away from the battery pack 1, so the through hole 4 will not be blocked, ensuring the stability and reliability of the smoke sensor during the operation of the battery system and improving the service life of the battery system PACK.

[0034] Furthermore, as a preferred embodiment, the smoke sensor is fixedly mounted on the battery pack via a bracket 5 .

[0035] The through hole 4 is located on a side of the smoke sensor 2 away from the bracket 5 .

[0036] Furthermore, as a preferred embodiment, the bracket 5 is fixedly connected to the battery pack 1 via at least two first fasteners 6 , and the smoke sensor 2 is fixedly connected to the bracket 5 via at least two second fasteners 7 .

[0037] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

[0038] The present invention also has the following implementation methods based on the above:

[0039] In further embodiments of the present invention, please continue to refer to Figures 1 to 7 As shown, the first fastener 6 is a bolt, and the second fastener 7 is a rivet bolt.

[0040] In a further embodiment of the present invention, the bracket 5 includes a first mounting plate 52, a support plate 53 and a second mounting plate 52 connected in sequence, the first mounting plate 51 is fixedly connected to the battery pack 1 through a first fastener 6, and the second mounting plate 52 is fixedly connected to the smoke sensor 2 through a second fastener 7.

[0041] In a further embodiment of the present invention, a gap 8 is defined between the second mounting plate 52 and the side wall of the battery pack 1 .

[0042] In a further embodiment of the present invention, the support plate 53 is perpendicular to the first mounting plate 51 and the second mounting plate 52 respectively, and the first mounting plate 51 is parallel to the second mounting plate 52 .

[0043] In a further embodiment of the present invention, the structure of the battery system PACK in which the smoke sensor is arranged further includes: a battery management system (not shown in the figure), the battery management system is signal-connected to the smoke sensor 2, and smoke data between the battery management system and the smoke sensor 2 is transmitted and processed in real time.

[0044] In a further embodiment of the present invention, the structure of the battery system PACK in which the smoke sensor is arranged further includes: an alarm module (not shown in the figure), the battery management system is signal-connected to the alarm module, the battery management system has a smoke alarm threshold, and when the smoke sensor 2 detects that the smoke data exceeds the smoke alarm threshold, the alarm module alarms.

[0045] The smoke sensor 2 is an aerosol sensor.

[0046] Arranging the smoke sensor 2 near the explosion-proof valve can detect possible smoke earlier and provide earlier warning for the safety of the battery system.

[0047] The utility model connects the smoke sensor 2 with the battery management system signal to realize real-time transmission and processing of smoke data. When the smoke sensor 2 detects smoke, the smoke data is promptly transmitted to the battery management system for analysis and processing. When the smoke concentration exceeds the threshold, the alarm module sends an alarm signal to remind the operator to take timely countermeasures.

[0048] The battery management system is equipped with a smoke sensor 2 located inside the battery pack. The smoke sensor 2 is tightly electrically connected to the battery management system via a dedicated sensor communication line, achieving efficient data transmission.

[0049] The smoke sensor 2 has a real-time monitoring function and can accurately measure the aerosol concentration in the battery pack.

[0050] If the smoke sensor 2 detects an abnormal change in aerosol concentration, it immediately transmits a signal to the battery management system, which uses a pre-set algorithm to determine whether the battery system is in a state of thermal runaway. If thermal runaway is confirmed, the battery management system will quickly trigger an alarm signal to ensure timely response and ensure the safe and stable operation of the battery system.

[0051] In a specific embodiment, the battery pack is designed to include a waterproof, breathable, explosion-proof valve 3, which is carefully installed on the battery pack casing to enhance the safety performance of the system. The smoke sensor 2 is cleverly arranged near the waterproof, breathable, explosion-proof valve 3, and its optional installation distance is optimized to less than 0.2 meters to ensure that the smoke sensor 2 can efficiently capture key information. When the battery pack experiences a sharp increase in internal pressure at the beginning of thermal runaway, the gas will preferentially be quickly discharged to the outside of the battery pack through the waterproof, breathable, explosion-proof valve. During this process, a significant airflow will be formed near the valve, further promoting the aerosol sensor's ability to quickly respond to thermal runaway signals.

[0052] The aerosol sensor continuously monitors subtle changes in aerosol concentration within the battery pack. If it detects changes outside normal ranges, it immediately determines that the battery system is in thermal runaway and reports this emergency to the battery management system's control unit. The battery management system's control unit then activates an emergency response mechanism, issuing a clear warning signal to the entire vehicle, prompting the driver and passengers to take swift action and evacuate the vehicle, effectively avoiding potential personal injury.

[0053] Inside the battery pack, when the aerosol concentration is maintained below 1000ug / m 3 When the aerosol concentration reaches a certain level, the aerosol sensor remains silent and does not trigger an alarm. When the battery management system is operating normally, the aerosol sensor continues to operate in continuous mode, detecting the aerosol concentration in the battery pack once a second to ensure accurate real-time monitoring. However, when the battery management system enters sleep mode to save energy, the aerosol sensor automatically switches to low-power mode, reducing the detection frequency to once every 12 seconds to balance energy consumption and monitoring needs.

[0054] Once a battery pack experiences thermal runaway, the internal pressure of the battery cells rises sharply, causing the battery cell explosion-proof valve to rupture, releasing gases, electrolyte, and other substances, rapidly forming smoke and aerosols, causing the aerosol concentration inside the battery pack to rise sharply. These gases are then discharged to the outside of the battery pack through the waterproof and breathable explosion-proof valve, forming a strong airflow near the valve. The aerosol sensor keenly captures this concentration change and immediately sends an alarm signal and a wake-up signal to the battery management system (if the battery management system is in sleep mode) when its preset alarm threshold is reached.

[0055] If the BMS is operating normally, it will directly receive the alarm signal and immediately send a thermal runaway warning signal to the vehicle's instrument cluster, clearly prompting the driver and passengers to evacuate the vehicle immediately. Conversely, if the BMS is dormant, the aerosol sensor will first send a wake-up signal to activate the BMS master controller, followed by an alarm signal. Once the BMS master controller is awakened and confirms the alarm signal's validity, it will also send a thermal runaway warning signal to the vehicle's instrument cluster, ensuring that the driver and passengers are promptly alerted and can take safety measures.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery system PACK arrangement smoke sensor structure, characterized in that: include: A battery pack, wherein a smoke sensor and an explosion-proof valve are mounted on the battery pack, the smoke sensor having at least one through hole, the through hole being located on a side of the smoke sensor away from the battery pack, and the distance between the smoke sensor and the explosion-proof valve is A, which is not less than 20 mm.

2. The structure of the battery system PACK with a smoke sensor according to claim 1, characterized in that: The smoke sensor is fixedly mounted on the battery pack via a bracket.

3. The structure of the battery system PACK with a smoke sensor according to claim 2, characterized in that: The bracket is fixedly connected to the battery pack via at least two first fasteners, and the smoke sensor is fixedly connected to the bracket via at least two second fasteners.

4. The structure of the battery system PACK with a smoke sensor according to claim 3, characterized in that: The first fastener is a bolt, and the second fastener is a rivet bolt.

5. The structure of the battery system PACK with a smoke sensor according to claim 3, characterized in that: The bracket includes a first mounting plate, a support plate, and a second mounting plate connected in sequence. The first mounting plate is fixedly connected to the battery pack via the first fastener, and the second mounting plate is fixedly connected to the smoke sensor via the second fastener.

6. The structure of the battery system PACK with a smoke sensor according to claim 5, characterized in that: There is a gap between the second mounting plate and the side wall of the battery pack.

7. The structure of the battery system PACK with a smoke sensor according to claim 5, characterized in that: The support plate is perpendicular to the first mounting plate and the second mounting plate respectively, and the first mounting plate is parallel to the second mounting plate.

8. The structure of the battery system PACK with a smoke sensor according to claim 1, characterized in that: Also includes: A battery management system is connected to the smoke sensor signal, and smoke data between the battery management system and the smoke sensor is transmitted and processed in real time.

9. The structure of the battery system PACK with a smoke sensor as claimed in claim 8, characterized in that: Also includes: The battery management system is connected to the alarm module by signal. The battery management system has a smoke alarm threshold. When the smoke sensor detects that the smoke data exceeds the smoke alarm threshold, the alarm module sounds an alarm.

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