Battery Detection Device and Battery System

Abstract

This application relates to a battery detection device and a battery system. The battery detection device includes a first gas pipeline, a gas extraction component, a gas detection component, and a second gas pipeline; wherein, the first gas pipeline, the gas extraction component, the gas detection component, and the second gas pipeline form a gas detection loop with the battery pack; the gas extraction component is configured to extract gas from inside the battery pack through the first gas pipeline; the gas detection component is configured to detect the gas extracted by the gas extraction component and transmit the detected gas back into the battery pack through the second gas pipeline. The battery detection device according to the embodiments of this application can perform safety detection on the battery pack.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a battery detection device and a battery system. Background Art

[0002] With the development of new energy technologies, battery packs are increasingly widely used. For example, lithium battery packs are used in electric vehicles to provide power for the electric vehicles. An electrolyte and a coolant are usually provided in the battery pack. If these liquids leak, it may cause the battery pack to catch fire, explode, and even threaten the safety of users.

[0003] Therefore, how to perform safety detection on the battery pack has become a technical problem to be solved urgently. Summary of the Invention

[0004] Based on the above problems, the present application provides a battery detection device and a battery system, which can perform safety detection on the battery pack.

[0005] The present application provides a battery detection device. The battery detection device includes a first gas pipeline, a gas extraction component, a gas detection component, and a second gas pipeline; wherein, the first gas pipeline, the gas extraction component, the gas detection component, and the second gas pipeline form a gas detection loop with the battery pack; the gas extraction component is used to extract gas from the inside of the battery pack through the first gas pipeline; the gas detection component is used to detect the gas extracted by the gas extraction component and transmit the detected gas back into the inside of the battery pack through the second gas pipeline.

[0006] In the technical solution of the embodiment of the present application, gas is extracted from the inside of the battery pack, and this gas can reflect some situations inside the battery pack, such as whether there is liquid leakage, overheating, and combustion inside the battery pack. Therefore, detecting the gas can prevent the battery pack from catching fire or exploding due to the above problems, thereby protecting the lives and property safety of users. Moreover, the gas detection device is arranged outside the battery pack, which does not need to occupy the internal space of the battery pack, and also facilitates the replacement, maintenance, and calibration of the gas extraction component and the gas detection component.

[0007] In some embodiments, a preset marker is added to the coolant of the battery pack, and the gas detection component includes a marker detection element; the marker detection element is used to detect whether the preset marker exists in the gas. In the technical solution of the embodiment of the present application, by detecting with the marker detection element, trace liquid leakage can be detected, so that the abnormality of the battery pack can be found in the initial stage of liquid leakage, and then timely treatment can be carried out to ensure the safety of the battery pack.

[0008] In some embodiments, the gas detection component further includes a temperature detection element; the temperature detection element is used to detect the temperature of the gas. In the technical solution of the embodiments of the present application, the abnormal temperature of the battery pack can be detected in time, so as to ensure the safety of the battery pack, and it can also provide a temperature reference for marker detection.

[0009] In some embodiments, the gas detection component further includes a particulate matter detection element; the particulate matter detection element is used to detect the particulate matter condition in the gas. In the technical solution of the embodiments of the present application, the abnormal particulate matter inside the battery pack can be detected in time, so as to ensure the safety of the battery pack.

[0010] In some embodiments, the gas detection component further includes a barometric pressure detection element; the barometric pressure detection element is used to detect the barometric pressure in the battery pack according to the gas. In the technical solution of the embodiments of the present application, the abnormal airtightness of the battery pack can be detected in time, so as to ensure the safety of the battery pack.

[0011] In some embodiments, the battery detection device further includes an inertial measurement unit; the inertial measurement unit is used to detect the inertial data of the battery pack. In the technical solution of the embodiments of the present application, it can be detected whether the battery pack has a collision accident and the severity of the collision accident, and it can be judged whether there is liquid leakage in the battery pack, so as to ensure the safety of the battery pack.

[0012] In some embodiments, the first gas pipeline includes a plurality of inner pipes, the gas extraction component includes a plurality of air pumps, and the inner pipes are connected to the air pumps in one-to-one correspondence; the pipe orifices of the plurality of inner pipes located inside the battery pack are respectively arranged at different positions inside the battery pack; the air pumps are used to extract gas from different positions inside the battery pack through the correspondingly connected inner pipes. In the technical solution of the embodiments of the present application, multiple positions inside the battery pack can be detected, making the detection more comprehensive and the detection result more accurate.

[0013] In some embodiments, the plurality of air pumps work alternately. In the technical solution of the embodiments of the present application, the alternate operation of the plurality of air pumps can determine the liquid leakage position, and only one air pump works within a period of time, which can also save the power consumption of the air pump.

[0014] In some embodiments, both the first gas pipeline and the second gas pipeline are integrally arranged with the outer shell of the battery pack. In the technical solution of the embodiments of the present application, the volume occupied by the gas pipeline can be reduced, and the cost of the gas pipeline can be saved.

[0015] The present application also provides a battery system, which includes a battery pack and a battery detection device as described above. In the technical solution of the embodiment of the present application, the battery pack is detected by the battery detection device, so that problems such as battery pack leakage, overtemperature and combustion can be discovered in time, thereby avoiding fire and explosion of the battery pack, thereby protecting the life and property safety of the user. In addition, the gas detection device is arranged outside the battery pack, without occupying the internal space of the battery pack, and is also convenient for the replacement, maintenance and calibration of the gas extraction component and the gas detection component.

[0016] In some embodiments, the battery system further includes a battery management system; a battery detection device for detecting the battery pack and obtaining a detection signal; and a battery management system for obtaining the detection signal and managing the battery pack accordingly when the detection signal indicates that the battery pack is leaking. In the technical solution of the embodiment of the present application, the battery pack is managed by the battery management system to ensure the safety of the battery pack, thereby protecting the life and property safety of the user.

[0017] In some embodiments, the battery detection device is used to extract gas from different positions inside the battery pack and generate corresponding detection signals according to the gas extracted at each position; the battery management system is used to obtain multiple detection signals and determine the leakage position according to the detection signal indicating battery pack leakage. In the technical solution of the embodiment of the present application, the leakage position can be determined through the cooperation of the battery management system and the battery detection device, which provides convenience for the maintenance of the battery pack and can improve the maintenance efficiency of the battery pack.

[0018] In some embodiments, the battery detection device is used to detect the inertia data of the battery pack; the battery management system is used to obtain the inertia data and, when it is determined that the inertia data meets the collision condition, control the battery detection device to perform leakage detection on the battery pack.

[0019] In some embodiments, the battery system further includes an alarm device; the battery management system is further configured to control the alarm device to output an alarm message when the battery pack is abnormal according to the detection signal. In the technical solution of the embodiment of the present application, the battery management system performs detection only after determining that the battery pack has collided according to the inertia data, which can save power consumption of the battery detection device.

[0020] In some embodiments, a coolant is provided in the battery pack, and a preset marker is added to the coolant. In the technical solution of the embodiment of the present application, a small amount of leakage can be detected, so that the battery pack can be repaired in time to ensure the safety of the battery pack.

[0021] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the following specific embodiments of this application are specifically given. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description of the alternative embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing alternative embodiments and are not considered to be a limitation of this application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0023] Figure 1 is one of the schematic structural diagrams of the battery detection device according to some embodiments of this application;

[0024] Figure 2 is the second schematic structural diagram of the battery detection device according to some embodiments of this application;

[0025] Figure 3 is the schematic diagram of the nozzle distribution of the inner tube according to some embodiments of this application;

[0026] Figure 4 is one of the schematic structural diagrams of the battery system according to some embodiments of this application;

[0027] Figure 5 is the second schematic structural diagram of the battery system according to some embodiments of this application.

[0028] The reference numerals in the specific embodiments are as follows:

[0029] Battery detection device 10, first gas pipeline 11, gas extraction component 12;

[0030] Gas detection component 13, second gas pipeline 14, inertial measurement unit 15;

[0031] Battery pack 20, battery management system 30. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will describe in detail the embodiments of the technical solution of this application with reference to the drawings. The following embodiments are only used to illustrate the technical solution of this application more clearly, so they are only examples and cannot be used to limit the protection scope of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0035] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0037] In the description of the embodiments of this application, the term "a plurality of" means more than two (including two). Similarly, "a plurality of groups" means more than two groups (including two groups), and "a plurality of pieces" means more than two pieces (including two pieces).

[0038] In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0039] To avoid the leakage of electrolyte and coolant in the battery pack, which may cause the battery pack to catch fire, explode, and even threaten the safety of users. This application discloses a battery detection device, which includes a first gas pipeline, a gas extraction component, a gas detection component, and a second gas pipeline; the first gas pipeline, the gas extraction component, the gas detection component, and the second gas pipeline form a gas detection loop with the battery pack; the gas extraction component extracts gas from the interior of the battery pack through the first gas pipeline; the gas detection component detects the gas extracted by the gas extraction component and transmits the detected gas back into the interior of the battery pack through the second gas pipeline. In the embodiments of this application, gas is extracted from the interior of the battery pack, and this gas can reflect some conditions inside the battery pack, such as whether there is liquid leakage, overheating, or combustion inside the battery pack. Therefore, detecting the gas can prevent the battery pack from catching fire or exploding due to the above problems, thereby protecting the lives and property of users.

[0040] The battery pack and battery system disclosed in the embodiments of this application can be but are not limited to being used in electrical devices such as vehicles, ships, or aircraft, nor are they limited to charging devices for various electrical devices. And the battery pack and battery system disclosed in the embodiments of this application can also be connected to the power grid to output the stored electrical energy to the power grid.

[0041] Please refer to Figure 1 , this application provides a battery detection device. The battery detection device 10 includes a first gas pipeline 11, a gas extraction component 12, a gas detection component 13, and a second gas pipeline 14; wherein, the first gas pipeline 11, the gas extraction component 12, the gas detection component 13, and the second gas pipeline 14 form a gas detection loop with the battery pack 20; the gas extraction component 12 is used to extract gas from the interior of the battery pack 20 through the first gas pipeline 11; the gas detection component 13 is used to detect the gas extracted by the gas extraction component 12 and transmit the detected gas back into the interior of the battery pack 20 through the second gas pipeline 14.

[0042] The battery detection device 10 in the embodiments of this application includes a first gas pipeline 11, a gas extraction component 12, a gas detection component 13, and a second gas pipeline 14. As Figure 1 shown, the first gas pipeline 11, the gas extraction component 12, the gas detection component 13, and the second gas pipeline 14 are connected in sequence. The first gas pipeline 11 is connected to the battery pack 20, and the second gas pipeline 14 is connected to the battery pack 20. In this way, the first gas pipeline 11, the gas extraction component 12, the gas detection component 13, the second gas pipeline 14, and the battery pack 20 form a gas detection loop.

[0043] At least one detection element may be provided in the gas detection component 13. Among them, the detection element may include a gas sensor, which can detect special components such as carbon dioxide, ammonia, methanol, ethanol, etc. The detection element may also include other sensors such as a temperature sensor, which is not limited in the embodiments of the present application.

[0044] During the detection process, the gas extraction component 12 performs the air extraction work. The gas inside the battery pack 20 flows into the gas extraction component 12 through the first gas pipeline 11, and then into the gas detection component 13. The gas detection component 13 detects the inflowing gas and can detect whether there are special components in the inflowing gas. If special components are detected, it indicates that there is a leakage of electrolyte or coolant inside the battery pack 20. Or, the gas detection component 13 detects the inflowing gas and can detect whether the temperature of the inflowing gas is abnormal. If the detected temperature exceeds the preset temperature threshold, it indicates that the temperature inside the battery pack 20 is too high.

[0045] After the gas detection component 13 performs gas detection, the gas flows back into the battery pack 20 through the second gas pipeline 14. It can be understood that the gas flows out from the first gas pipeline 11 and flows into through the second gas pipeline 14, and the gas flow strengthens the gas disturbance inside the battery pack 20. If there is a leakage situation, the volatilization of the leakage can be accelerated, so as to detect the leakage earlier. Moreover, the gas disturbance can also reduce the detection dead zone inside the battery pack 20, which is beneficial to improving the detection speed.

[0046] The above battery detection device forms a gas detection loop composed of a first gas pipeline, a gas extraction component, a gas detection component, and a second gas pipeline; the gas extraction component extracts gas from inside the battery pack through the first gas pipeline; the gas detection component detects the gas extracted by the gas extraction component and transmits the detected gas back into the battery pack through the second gas pipeline. In the embodiments of the present application, gas is extracted from inside the battery pack, and this gas can reflect some situations inside the battery pack, such as whether there are problems such as leakage, overheating, and combustion inside the battery pack. Therefore, detecting the gas can prevent the battery pack from catching fire or exploding due to the above problems, thereby protecting the life and property safety of users. Moreover, the gas detection device is arranged outside the battery pack, which does not need to occupy the internal space of the battery pack, and also facilitates the replacement, maintenance, and calibration of the gas extraction component and the gas detection component.

[0047] According to some embodiments of the present application, a preset marker is added to the coolant of the battery pack 20, and the gas detection component 13 includes a marker detection element; the marker detection element is used to detect whether there is a preset marker in the gas.

[0048] During the manufacturing process of the battery pack 20, a preset marker can be added to the coolant of the battery pack 20. If the coolant of the battery pack 20 leaks, the preset marker will volatilize. When the gas extraction component 12 extracts gas from the interior of the battery pack 20, the preset marker will also be extracted. After the gas flows into the gas detection component 13, the marker detection element in the gas detection component 13 can detect the presence of the preset marker in the gas.

[0049] For example, the marker detection element can be a gas sensor or an electronic nose. Add ammonia water with a preset mass fraction or fill in ammonia gas with a preset volume to the coolant. When the coolant leaks, ammonia gas will volatilize. When the gas sensor detects that the ammonia gas concentration is greater than the first preset concentration, it outputs a corresponding detection signal. Or, add 0.1% of tetrahydrothiophene liquid to the coolant. When the coolant leaks, the electronic nose can detect that the concentration of tetrahydrothiophene is greater than the second preset concentration and output a corresponding detection signal. The embodiments of the present application do not limit the preset marker added to the coolant, the addition amount of the preset marker, the first preset concentration, and the second preset concentration, and can be set according to the actual situation.

[0050] In some embodiments, the gas detection component 13 can also detect the leakage of the electrolyte of the battery pack 20 according to the above detection method, which will not be elaborated in the embodiments of the present application.

[0051] In the above embodiments, a preset marker is added to the coolant of the battery pack, and the gas detection component includes a marker detection element; the marker detection element detects whether the preset marker exists in the gas. Since the preset marker is easily detected, the embodiments of the present application can detect trace liquid leakage through the marker detection element, thereby discovering the abnormality of the battery pack at the initial stage of liquid leakage, and then processing it in time to ensure the safety of the battery pack.

[0052] According to some embodiments of the present application, the gas detection component 13 further includes a temperature detection element; the temperature detection element is used to detect the temperature of the gas.

[0053] The gas detection component 13 can also include a temperature detection element. After the gas extracted by the gas extraction component 12 flows into the gas detection component 13, the temperature detection element can detect the temperature of the inflowing gas.

[0054] In one implementation manner, the temperature detection element determines whether the temperature of the inflowing gas is greater than a preset temperature threshold. If the gas temperature is greater than the preset temperature threshold, it indicates that the temperature inside the battery pack 20 is too high, which may be due to an abnormality in the heat dissipation system of the battery pack 20 or an internal combustion of the battery pack 20. Then the temperature detection element outputs a corresponding detection signal.

[0055] In another embodiment, the temperature detection element determines whether the temperature of the inflowing gas is within a preset temperature range. If the inflowing gas is within the preset temperature range, it indicates that the temperature inside the battery pack 20 is normal, and at this time, the detection result of the marker detection element is relatively accurate. If the inflowing gas is outside the preset temperature range, it indicates that the temperature inside the battery pack 20 is abnormal, and at this time, the detection result of the marker detection element may be inaccurate.

[0056] In the above embodiment, the gas detection component further includes a temperature detection element for detecting the gas temperature. Through the detection of the temperature detection element in the embodiment of the present application, the temperature abnormality of the battery pack can be discovered in time, thereby ensuring the safety of the battery pack and providing a temperature reference for the marker detection.

[0057] According to some embodiments of the present application, the gas detection component 13 further includes a particulate matter detection element; the particulate matter detection element is used to detect the particulate matter condition in the gas.

[0058] The gas detection component 13 may further include a particulate matter detection element. After the gas extracted by the gas extraction component 12 flows into the gas detection component 13, the particulate matter detection element performs particulate matter detection on the inflowing gas. If the number of particulate matters in the detected gas is greater than a preset number threshold, it indicates that the particulate matters inside the battery pack 20 increase, and they may be the particulate matters generated by the internal combustion of the battery pack 20, then the particulate matter detection element outputs a corresponding detection signal.

[0059] Among them, the particulate matter can be particulate matter of a certain particle size or particulate matter of multiple particle sizes. For example, the particulate matter detection element can only detect the number of particulate matters with a particle size greater than 10 μm, or can separately detect the number of particulate matters with a particle size less than 1 μm, the number of particulate matters with a particle size between 1 - 10 μm, and the number of particulate matters with a particle size greater than 10 μm. The embodiments of the present application do not make limitations in this regard.

[0060] In the above embodiment, the gas detection component further includes a particulate matter detection element for detecting the particulate matter condition in the gas. Through the detection of the particulate matter detection element in the embodiment of the present application, the particulate matter abnormality inside the battery pack can be discovered in time, thereby ensuring the safety of the battery pack.

[0061] According to some embodiments of the present application, the gas detection component 13 further includes a pressure detection element; the pressure detection element is used to detect the air pressure in the battery pack 20 according to the gas.

[0062] The gas detection component 13 may further include a barometric pressure detection element. After the gas extracted by the gas extraction component 12 flows into the gas detection component 13, the barometric pressure detection element can detect the barometric pressure of the inflowing gas. The battery pack 20 is airtight, and the gas detection loop formed by the first gas pipeline 11, the gas extraction component 12, the gas detection component 13, the second gas pipeline 14 and the battery pack 20 is a closed loop. After the battery pack 20 is sealed, the pressure inside the battery pack 20 is usually greater than the external atmospheric pressure. If it is detected that the barometric pressure inside the battery pack 20 drops and is lower than the preset barometric pressure threshold within the preset time period, indicating that the airtightness of the battery pack 20 is abnormal, the barometric pressure detection element outputs a corresponding detection signal.

[0063] In the above embodiment, the gas detection component further includes a barometric pressure detection element for detecting the barometric pressure in the battery pack. Through the detection of the barometric pressure detection element in the embodiment of the present application, the abnormal airtightness of the battery pack can be found in time, thus ensuring the safety of the battery pack.

[0064] According to some embodiments of the present application, the battery detection device 10 further includes an Inertial Measurement Unit (IMU) 15; the inertial measurement unit 15 is used to detect the inertial data of the battery pack 20.

[0065] The battery detection device 10 may further include an inertial measurement unit 15. As Figure 2 shown, the inertial measurement unit 15 can be arranged at the same position as the gas detection component 13. The inertial measurement unit 15 can detect the inertial data of the battery pack 20.

[0066] Assume that the battery pack 20 is used in a vehicle. During the movement of the vehicle, the inertial measurement unit 15 can detect the inertial data of the battery pack 20 following the movement of the vehicle. For example, if the battery pack 20 is used in a vehicle and the vehicle collides, the inertial measurement unit 15 can detect the inertial data of the battery pack 20. After that, the vehicle can determine the severity of the collision accident based on the inertial data, and then judge whether there is a problem such as liquid leakage in the battery pack 20.

[0067] In the above embodiment, the battery detection device further includes an inertial measurement unit for detecting the inertial data of the battery pack. Through the detection of the inertial measurement unit in the embodiment of the present application, it can be detected whether the battery pack has a collision accident and the severity of the collision accident, and it can be judged whether there is liquid leakage in the battery pack, thus ensuring the safety of the battery pack.

[0068] According to some embodiments of the present application, the first gas pipeline 11 includes a plurality of inner pipes, and the gas extraction component 12 includes a plurality of air pumps, and the inner pipes are connected to the air pumps in one-to-one correspondence; as Figure 3As shown, multiple inner tubes are located at the pipe orifices inside the battery pack 20, and are respectively arranged at different positions inside the battery pack 20; an air pump is used to extract gas from different positions inside the battery pack 20 through the correspondingly connected inner tubes.

[0069] The first gas pipeline 11 may include multiple inner tubes, and the pipe orifices of each inner tube inside the battery pack 20 are arranged at different positions inside the battery pack 20. For example, the pipe orifices of the multiple inner tubes inside the battery pack 20 may be arranged at the water-cooling plate welding joints, water-cooling pipeline interfaces, cell weld seams, explosion-proof valves, and dead zones. The embodiments of the present application do not limit the distribution positions of the pipe orifices.

[0070] The gas extraction component 12 includes multiple air pumps, and the pipe orifices of each inner tube outside the battery pack 20 in the first gas pipeline 11 are connected to one air pump. When each air pump works, it can extract gas from different positions inside the battery pack 20 through the correspondingly connected inner tubes.

[0071] For example, the air pump 1 is connected to the inner tube 1, and the pipe orifice of the inner tube 1 inside the battery pack 20 is arranged at the water-cooling plate welding joint; when the air pump 1 works, it can extract the gas at the water-cooling plate welding joint through the inner tube 1. The air pump 2 is connected to the inner tube 2, and the pipe orifice of the inner tube 2 inside the battery pack 20 is arranged at the water-cooling pipeline interface; when the air pump 2 works, it can extract the gas at the water-cooling pipeline interface through the inner tube 2.

[0072] In one application scenario, multiple air pumps work simultaneously. In this way, the gas detection component 13 can detect the gases at multiple positions inside the battery pack 20 simultaneously, and the detection efficiency is relatively high.

[0073] In another application scenario, multiple air pumps work alternately. In this way, the gas detection component 13 can detect the gases at different positions of the battery pack 20 respectively, so as to determine the position of the liquid leakage.

[0074] For example, when the air pump 1 works and other air pumps do not work, the air pump 1 can extract the gas at the water-cooling plate welding joint through the inner tube 1, and then the gas detection component 13 detects the gas at the water-cooling plate welding joint. If an abnormality is detected, it can be determined that an abnormality has occurred at the water-cooling plate welding joint inside the battery pack 20. If no abnormality is detected, the air pump 2 works and other air pumps do not work, and the air pump 2 can extract the gas at the water-cooling pipeline interface through the inner tube 2. If an abnormality is detected, it can be determined that an abnormality has occurred at the water-cooling pipeline interface inside the battery pack 20. By analogy, different positions inside the battery pack 20 can be detected, so as to accurately locate the position where the abnormality occurs.

[0075] In the above embodiments, the first gas pipeline includes a plurality of inner pipes, the gas extraction component includes a plurality of air pumps, and the inner pipes are connected to the air pumps in a one-to-one correspondence; the pipe orifices of the plurality of inner pipes located inside the battery pack are respectively arranged at different positions inside the battery pack; the air pumps extract gas from different positions inside the battery pack through the correspondingly connected inner pipes. Through the embodiments of the present application, the pipe orifices of the plurality of inner pipes located inside the battery pack are arranged at different positions inside the battery pack, so that multiple positions inside the battery pack can be detected, making the detection more comprehensive and the detection result more accurate; moreover, multiple air pumps work simultaneously, which can improve the detection efficiency. Multiple air pumps work alternately to determine the liquid leakage position, and only one air pump works within a period of time, which can also save the power consumption of the air pump.

[0076] According to some embodiments of the present application, both the first gas pipeline 11 and the second gas pipeline 14 are integrally arranged with the outer shell of the battery pack 20.

[0077] When manufacturing the outer shell of the battery pack 20, the gas pipeline can be integrally manufactured in the outer shell of the battery pack 20. In this way, the first gas pipeline 11 and the second gas pipeline 14 are integrally arranged with the outer shell of the battery pack 20, which can reduce the volume occupied by the gas pipeline and save the cost of the gas pipeline.

[0078] Please refer to Figure 1 , the present application provides a battery system, which includes a battery pack 20 and a battery detection device 10 as in the above embodiments.

[0079] The battery detection device 10 includes a first gas pipeline 11, a gas extraction component 12, a gas detection component 13, and a second gas pipeline 14; the first gas pipeline 11, the gas extraction component 12, the gas detection component 13, and the second gas pipeline 14 form a gas detection loop with the battery pack 20. Among them, both the first gas pipeline 11 and the second gas pipeline 14 can be integrally arranged with the outer shell of the battery pack 20, so as to save the volume occupied by the gas pipeline and the cost of the gas pipeline.

[0080] The gas extraction component 12 extracts gas from inside the battery pack 20 through the first gas pipeline 11; the gas detection component 13 detects the gas extracted by the gas extraction component 12 and transmits the detected gas back into the battery pack 20 through the second gas pipeline 14.

[0081] In some embodiments, a preset marker is added to the coolant of the battery pack 20, and the gas detection component 13 includes a marker detection element; the marker detection element detects whether the preset marker exists in the gas. Since the preset marker is easy to detect, therefore, the marker detection element can detect trace liquid leakage, so as to discover potential safety hazards in time.

[0082] In some embodiments, the gas detection component 13 may further include at least one of a temperature detection element, a particulate matter detection element, and a barometric pressure detection element. Among them, the temperature detection element detects the temperature of the gas; the particulate matter detection element detects the particulate matter condition in the gas; the barometric pressure detection element is based on the barometric pressure in the gas detection battery pack 20. Through the temperature detection element, abnormal battery temperature can be detected in a timely manner, and it can also provide a temperature reference for the marker detection element; through the particulate matter detection element, abnormal particulate matter inside the battery pack can be detected in a timely manner, so as to detect the problem of battery pack combustion in a timely manner; through the barometric pressure detection element, abnormal airtightness of the battery pack can be detected in a timely manner, thus ensuring the safety of the battery pack.

[0083] The above battery system includes a battery pack and a battery detection device. By using the battery detection device to detect the battery pack, problems such as battery pack leakage, overheating, and combustion can be detected in a timely manner, thereby avoiding the occurrence of fire and explosion of the battery pack, and further protecting the lives and property safety of users. Moreover, the gas detection device is arranged outside the battery pack, without occupying the internal space of the battery pack, and it is also convenient for the replacement, maintenance, and calibration of the gas extraction component and the gas detection component.

[0084] According to some embodiments of the present application, as Figure 5 shown, the battery system further includes a Battery Management System (BMS) 30; a battery detection device 10 for detecting the battery pack 20 to obtain a detection signal; a battery management system 30 for acquiring the detection signal and performing corresponding management on the battery pack 20 when the detection signal indicates that the battery pack 20 is leaking.

[0085] The BMS 30 is communicatively connected to the battery detection device 10. After the gas detection component 13 of the battery detection device 10 obtains the detection signal, the detection signal is transmitted to the BMS 30. If the detection signal indicates that the battery pack 20 is leaking, the BMS 30 performs corresponding management on the battery pack 20.

[0086] For example, when the gas detection component 13 of the battery detection device 10 detects that the concentration of a preset marker in the gas exceeds the preset concentration, a detection signal indicating that the battery pack 20 is leaking is generated; the BMS 30 acquires this detection signal and can cut off the power supply of the battery pack 20 or take other management measures.

[0087] In the above embodiments, the battery system further includes a battery management system; the battery detection device detects the battery pack to obtain a detection signal; the battery management system acquires the detection signal and performs corresponding management on the battery pack when the detection signal indicates that the battery pack is leaking. By managing the battery pack through the battery management system in the embodiments of the present application, the safety of the battery pack can be ensured, thereby protecting the lives and property safety of users.

[0088] According to some embodiments of the present application, a battery detection device 10 is configured to extract gas from different positions inside a battery pack 20 and generate corresponding detection signals based on the gas extracted from each position; a battery management system 30 is configured to obtain a plurality of detection signals and determine a leakage position based on a detection signal indicating leakage of the battery pack 20.

[0089] The first gas pipeline 11 of the battery detection device 10 includes a plurality of inner pipes, and the gas extraction component 12 includes a plurality of air pumps. The inner pipes are connected to the air pumps in a one-to-one correspondence; the pipe orifices of the plurality of inner pipes located inside the battery pack 20 are respectively arranged at different positions inside the battery pack 20; the air pumps extract gas from different positions inside the battery pack 20 through the correspondingly connected inner pipes.

[0090] The plurality of air pumps can work simultaneously; the plurality of air pumps can also work alternately. Taking the case where the plurality of air pumps work alternately as an example, when one air pump works, it extracts gas from inside the battery pack 20 through the correspondingly connected inner pipe. If the gas detection component 13 detects the extracted gas and determines that the battery pack 20 is normal, the next air pump works. If the gas detection component 13 detects the extracted gas and determines that the battery pack 20 is leaking, it sends the detection signal to the BMS 30. The BMS 30 obtains the detection signal, determines the gas extraction position based on the detection signal, and determines the leakage position based on the gas extraction position.

[0091] For example, when the air pump 1 works, it extracts gas from the welded joint of the water-cooled plate through the inner pipe 1; if the gas detection component 13 detects that the concentration of the preset marker exceeds the preset concentration, it sends the detection signal to the BMS 30. The BMS 30 obtains the detection signal and determines that the leakage position is the welded joint of the water-cooled plate according to the detection signal. The present application embodiment does not limit the preset concentration.

[0092] In the above embodiments, the battery detection device extracts gas from different positions inside the battery pack and generates corresponding detection signals based on the gas extracted from each position; the battery management system obtains a plurality of detection signals and determines the leakage position based on the detection signal indicating leakage of the battery pack. Through the cooperation of the battery management system and the battery detection device in the embodiments of the present application, the leakage position can be determined, which facilitates the maintenance of the battery pack and can improve the maintenance efficiency of the battery pack.

[0093] According to some embodiments of the present application, a battery detection device 10 is configured to detect inertial data of a battery pack 20; a battery management system 30 is configured to obtain the inertial data and control the battery detection device 10 to perform a leakage detection on the battery pack 20 when it is determined that the inertial data meets the collision condition.

[0094] The battery detection device 10 further includes an inertial measurement unit 15; the inertial measurement unit 15 detects the inertial data of the battery pack 20. The BMS 30 acquires the inertial data and determines whether the inertial data meets the collision condition. If it is determined that the inertial data meets the collision condition, the battery detection device 10 is controlled to perform a leakage detection on the battery pack 20. That is, the battery detection device 10 starts an air pump, and the air pump operates to extract gas from the inside of the battery pack 20, and the gas detection component 13 detects the extracted gas.

[0095] The above determination of whether the inertial data meets the collision condition may include: comparing the inertial data with a preset inertial threshold, and if the inertial data is greater than the preset inertial threshold, it is determined that the inertial data meets the collision condition.

[0096] In the above embodiment, the battery detection device detects the inertial data of the battery pack; the battery management system acquires the inertial data and controls the battery detection device to perform a leakage detection on the battery pack when it is determined that the inertial data meets the collision condition. The battery detection device can detect the battery pack in real time, so as to closely monitor the safety of the battery pack; the battery detection device can also perform detection only after the battery management system determines that the battery pack has collided according to the inertial data, thereby saving the power consumption of the battery detection device.

[0097] According to some embodiments of the present application, the battery system further includes an alarm device; the battery management system 30 is further configured to control the alarm device to output an alarm message when it is determined that the battery pack 20 is abnormal according to the detection signal.

[0098] The battery system further includes an alarm device, wherein the alarm device may include a warning light, a speaker, etc. The embodiments of the present application do not limit the alarm device.

[0099] The BMS 30 is communicatively connected to the alarm device. If the BMS 30 determines that the battery pack 20 is abnormal according to the detection signal, it controls the alarm device to output an alarm message. For example, if the BMS 30 determines that the battery pack 20 is leaking according to the detection signal, it controls the warning light to light up and the speaker to play an alarm sound.

[0100] In the above embodiment, the battery system further includes an alarm device; when the battery management system determines that the battery pack is abnormal according to the detection signal, it controls the alarm device to output an alarm message. By outputting an alarm message through the alarm device in the embodiments of the present application, the user can be prompted to repair the battery pack in time, thereby ensuring the safety of the battery pack.

[0101] According to some embodiments of the present application, a coolant is provided in the battery pack 20, and a preset marker is added to the coolant.

[0102] Among them, the preset markers added to the coolant may include any one of carbon dioxide, ammonia, sulfur dioxide, methanol, ethanol, hydrogen sulfide, tetrahydrothiophene, mercaptan, thioether, acrylate, and pyrazine. The embodiments of the present application do not limit the preset markers, and they can be added according to actual situations.

[0103] For example, add ammonia water with a preset mass fraction to the coolant, or fill in ammonia gas with a preset volume. When the coolant leaks, ammonia gas will volatilize. When the gas sensor detects that the ammonia concentration is greater than the first preset concentration, it outputs a corresponding detection signal. Or, add 0.1% of tetrahydrothiophene liquid to the coolant. When the coolant leaks, the electronic nose can detect that the concentration of tetrahydrothiophene is greater than the second preset concentration and output a corresponding detection signal. The embodiments of the present application do not limit the addition amount of the preset marker and the detection method of the preset marker, and they can be set according to actual situations.

[0104] In the above embodiments, a coolant is provided in the battery pack, and a preset marker is added to the coolant. Since the preset marker is easy to detect, therefore, a small amount of liquid leakage can be detected, so that the battery pack can be repaired in time to ensure the safety of the battery pack.

[0105] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0106] The above-described embodiments only represent several implementation manners of the present application, which are convenient for understanding the technical solutions of the present application specifically and in detail, but should not be construed as a limitation on the protection scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments based on the technical solutions provided by the present application are all within the protection scope of the appended claims of the present application. Therefore, the protection scope of the patent of the present application should be subject to the content of the appended claims, and the description and drawings can be used to explain the content of the claims.

Claims

1. A battery detection device, characterized in that, The battery detection device includes a first gas pipeline, a gas extraction component, a gas detection component, and a second gas pipeline; wherein, the first gas pipeline, the gas extraction component, the gas detection component, and the second gas pipeline form a gas detection loop with the battery pack; The first gas pipeline includes a plurality of inner pipes, and the pipe orifices of the plurality of inner pipes located inside the battery pack are respectively arranged at different positions inside the battery pack; The gas extraction component is used to extract gas from inside the battery pack through the plurality of inner pipes; The gas detection component is used to detect the gas extracted by the gas extraction component, and transmit the detected gas back into the battery pack through the second gas pipeline.

2. The battery detection device according to claim 1, wherein A preset marker is added to the coolant of the battery pack, and the gas detection component includes a marker detection element; The marker detection element is used to detect whether the preset marker exists in the gas.

3. The battery detection device according to claim 2, characterized in that, The gas detection component further includes a temperature detection element; The temperature detection element is used to detect the temperature of the gas.

4. The battery detection device according to claim 2, characterized in that The gas detection component further includes a particulate matter detection element; The particulate matter detection element is used to detect the particulate condition in the gas.

5. The battery detection device according to claim 2, characterized in that, The gas detection component further includes a barometric pressure detection element; The barometric pressure detection element is used to detect the barometric pressure in the battery pack according to the gas.

6. The battery detection device according to claim 1, wherein The battery detection device further includes an inertial measurement unit; The inertial measurement unit is used to detect the inertial data of the battery pack.

7. The battery detection device according to claim 1, wherein, The gas extraction component includes a plurality of air pumps, and the inner pipes are connected to the air pumps in a one-to-one correspondence; The air pump is used to extract gas from different positions inside the battery pack through the correspondingly connected inner pipe.

8. The battery detection device according to claim 7, characterized in that, The plurality of air pumps work alternately.

9. The battery detection device according to claim 1, wherein Both the first gas pipeline and the second gas pipeline are integrally arranged with the outer shell of the battery pack.

10. A battery system, characterized in that, The battery system includes a battery pack and the battery detection device according to any one of claims 1-8.

11. The battery system according to claim 10, characterized in that, The battery system further includes a battery management system; The battery detection device is used to detect the battery pack to obtain a detection signal; The battery management system is used to obtain the detection signal, and perform corresponding management on the battery pack when the detection signal indicates that the battery pack is leaking liquid.

12. The battery system according to claim 11, wherein The battery detection device is used to extract gas from different positions inside the battery pack, and generate corresponding detection signals according to the gas extracted from each position; The battery management system is used to obtain a plurality of the detection signals, and determine the liquid leakage position according to the detection signal indicating that the battery pack is leaking liquid.

13. The battery system according to claim 11, wherein The battery detection device is used to detect the inertial data of the battery pack; The battery management system is used to obtain the inertial data, and control the battery detection device to perform a liquid leakage detection on the battery pack when it is determined that the inertial data meets the collision condition.

14. The battery system according to claim 11, characterized in that, The battery system further includes an alarm device; The battery management system is further configured to control the alarm device to output an alarm message when it is determined that the battery pack is abnormal according to the detection signal.

15. The battery system according to any one of claims 10-14, characterized in that, A coolant is provided in the battery pack, and a preset marker is added to the coolant.

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