Detection device and battery recovery system

Abstract

The utility model relates to the technical field of detection equipment, and provides a detection device and a battery recovery system. The detection device comprises a cover body which is provided with an accommodating cavity and is used for covering a pressure relief opening of a battery monomer; the circuit board is arranged on the cover body and is provided with a detection circuit; the power supply is connected in series with the detection circuit; the at least one detection assembly is arranged in the containing cavity, each detection assembly comprises two detection pieces, the two detection pieces are connected to the detection circuit in series and are used for stretching into the pressure relief opening, the first end of each detection piece is in conductive connection with the detection circuit, and the second end of each detection piece is configured to be capable of being in conductive contact with a weak component of the pressure relief mechanism. According to the technical scheme, when the protruding height of the weak part exceeds the maximum limit value, the surface of the weak part can be in conductive contact with the second ends of the two detection pieces of the detection assembly at the same time, so that the detection circuit is switched on, the protruding abnormity of the weak part can be judged, and the quality detection efficiency of the pressure relief mechanism is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, in particular to a detection device and a battery recycling system. BACKGROUND

[0002] This part provides only background information related to the present disclosure, which is not necessarily prior art.

[0003] At present, the battery device of the electric equipment such as new energy vehicles is usually recycled after use, and the battery monomer in the battery device is usually detected in quality after recycling to determine whether the battery monomer can be reused.

[0004] Among them, the battery monomer is provided with a pressure relief mechanism, and the pressure relief mechanism is usually provided with a weak part. The weak part is generally arranged in the pressure relief port and blocked in the pressure relief port. During use of the battery monomer, the weak part will usually locally protrude due to the internal pressure of the battery monomer. If the protrusion height exceeds the maximum limit value, the battery monomer cannot be reused. However, the conventional method cannot quickly detect whether the protrusion height of the weak part exceeds the limit, and therefore, it is urgent to design a detection device capable of detecting whether the protrusion height of the weak part of the pressure relief mechanism exceeds the limit. Utility model content

[0005] The purpose of the present application is to provide a detection device and a battery recycling system, which can quickly detect whether the protrusion of the weak part of the pressure relief mechanism exceeds the limit, so as to screen out reusable battery monomers. The purpose is achieved by the following technical solutions:

[0006] In some embodiments of the present application, the present application provides a detection device for detecting a pressure relief mechanism arranged at a pressure relief port of a battery monomer. The detection device comprises: a cover body having a receiving cavity, the cover body being used to cover the pressure relief port; a circuit board arranged in the cover body, the circuit board being provided with a detection circuit; a power supply connected in series with the detection circuit; at least one group of detection components arranged in the receiving cavity, each group of detection components comprising two detection members connected in series with the detection circuit, and the two detection members being used to extend into the pressure relief port, a first end of each detection member being in conductive connection with the detection circuit, a second end of each detection member being configured to be in conductive contact with the weak part of the pressure relief mechanism, and the second ends of the two detection members of each group of detection components being used to detect different parts of the weak part.

[0007] According to the detection device provided in the application, before detection, the cover body can be covered on the pressure relief port of the battery monomer to make the accommodation cavity communicate with the pressure relief port. Since the circuit board is arranged in the cover body, the detection circuit on the circuit board and the detection assembly form a conductive path, and the two detection members of the detection assembly extend into the pressure relief port and face the weak part of the pressure relief mechanism. The second end of the detection member can correspond to the maximum limit value of the protrusion height of the weak part, and when the protrusion height of the weak part exceeds the maximum limit value, the surface of the weak part will form a conductive contact with the second ends of the two detection members at the same time, so that the detection circuit is turned on. The operator can directly judge the abnormal protrusion of the weak part through the on-off state of the circuit, without the need for complex measurement operation, and the detection time can be greatly shortened, which is suitable for batch detection scenes in the battery recycling link.

[0008] In addition, the detection device provided in the application can also have the following additional technical features:

[0009] In some embodiments of the application, each detection assembly further comprises two elastic conductive members, and each detection member is conductively connected between the first end and the detection circuit through one elastic conductive member.

[0010] By conductively connecting one end of each elastic conductive member to the detection circuit and conductively connecting the other end to the first end of the detection member, the elastic conductive member is connected in series between the detection member and the detection circuit. When the second end of the detection member comes into contact with the weak part, the elastic conductive member will adaptively deform with the contact pressure, allowing the second end of the detection member to maintain stable conductive contact with the weak part, and buffering the force during contact to reduce mechanical damage to the weak part and improve the safety of the detection device.

[0011] In some embodiments of the application, the cover body has a first wall, the first wall is arranged to face the weak part, the first wall is provided with a limiting groove, the number of limiting grooves is the same as the number of elastic conductive members, and each elastic conductive member is arranged in a corresponding limiting groove.

[0012] The first wall of the cover body faces the weak part, and by arranging the limiting grooves corresponding to the number of elastic conductive members on the first wall and arranging one elastic conductive member in each limiting groove, the limiting grooves can constrain the elastic conductive members in the circumferential direction, reducing the risk of lateral deviation of the elastic conductive members during assembly or deformation, and helping to improve the stability of the conductive connection between the elastic conductive members, the detection members and the detection circuit, and making the installation of the elastic conductive members in the accommodation cavity more regular, so as to reasonably utilize the internal space of the accommodation cavity.

[0013] In some embodiments of the application, the number of detection assemblies is multiple, the multiple detection assemblies are connected in parallel to the detection circuit, and the second ends of the detection members in the multiple detection assemblies are configured to have different setting heights in the pressure relief port.

[0014] By arranging multiple groups of detection assemblies in parallel in the detection circuit, and adjusting the mounting height of the second end of the detection member in each group of detection assemblies according to the maximum limit value of the protrusion height of the weak part, the second ends of the detection members of different groups form a gradient height distribution according to the shape of the weak part. When the protrusion of the weak part exceeds the maximum limit, it will sequentially contact the detection members with corresponding height according to the protrusion height. The two detection members of the detection assembly with the corresponding set height will simultaneously conductive contact with the weak part, so as to make the detection circuit conductive, and further determine the abnormal protrusion of the weak part.

[0015] In some embodiments of the present application, the detection device further comprises a fixing member, which is arranged in the accommodation cavity and connected with the inner wall surface of the accommodation cavity; wherein the fixing member is provided with at least one through hole, and the two detection members of each group of detection assemblies are arranged in one through hole.

[0016] By mounting the fixing member in the accommodation cavity and connecting it with the inner wall surface of the accommodation cavity, and opening through holes on the fixing member matching the number of detection assemblies, the two detection members of each group of detection assemblies are arranged in one through hole. The through hole can guide the detection member axially and limit it radially, so that the second end of the detection member can accurately align with the preset detection area of the weak part, and reduce the risk of short circuit caused by contact between the detection members of the adjacent detection assemblies, as well as the risk of skew or misplacement of the detection member when contacting the weak part, which helps to improve the reliability of the detection result.

[0017] In some embodiments of the present application, the inner wall surface of the accommodation cavity is provided with a mounting groove extending along the circumference of the accommodation cavity, and the fixing member is embedded in the mounting groove; or the inner wall surface of the accommodation cavity is provided with a stepped surface, and the fixing member is arranged on the stepped surface.

[0018] When mounting the fixing member, a mounting groove extending along the circumference of the accommodation cavity can be arranged on the inner wall surface of the accommodation cavity, and the fixing member is embedded in the mounting groove, so that the fixing member can be fixed and mounted, and the structure and principle are relatively simple and easy to realize. Alternatively, a stepped surface can be constructed on the inner wall surface of the accommodation cavity, and the fixing member is placed on the stepped surface and fixed with the inner wall surface. Both mounting methods can provide a stable mounting reference for the fixing member, making the connection between the fixing member and the inner wall surface of the accommodation cavity more reliable, reducing the risk of positioning deviation of the detection member caused by loosening of the fixing member during detection, and at the same time helping to simplify the assembly process of the fixing member, reduce the assembly difficulty of the device, and improve the product assembly efficiency.

[0019] In some embodiments of the present application, the fixing member is an insulating member.

[0020] By setting the fixing member as an insulating member, the fixing member of insulating material can block the conductive path formed between the detection members of different detection assemblies through the fixing member, so that the detection logic of each detection assembly can be independently operated, to reduce the short circuit or misdirecting phenomenon between the detection assemblies, and reduce the influence of circuit interference on the detection result, and improve the accuracy of the detection result.

[0021] In some embodiments of the present application, the detection device further comprises a warning device connected in series with the detection circuit, for issuing a warning signal when the weak part protrudes to contact the two detection members of the detection assembly.

[0022] When the protrusion height of the weak part exceeds the maximum limit value and simultaneously forms conductive contact with the two detection members of a certain detection assembly, the corresponding detection circuit is turned on, triggering the warning device to issue an audible and / or visual warning signal. This process does not require additional observation of the on-off state of the circuit by the operator, and the detection result of the protrusion of the weak part exceeding the limit can be quickly obtained through the warning signal, thereby shortening the result identification time, especially suitable for batch detection scenarios, and further improving the overall efficiency of the detection work.

[0023] In some embodiments of the present application, the detection device further comprises a power supply, which is arranged on the cover and connected in series with the detection circuit.

[0024] By installing the power supply on the cover and connecting it in series with the detection circuit, the power supply can provide the required power for the detection circuit, the warning device and other components. The integrated design of the power supply and the cover allows the detection device to complete the detection independently without relying on external power supply, improving the portability of the device and adapting to different detection needs in different locations. At the same time, the external connection lines of the device are simplified, reducing the complexity of on-site operation.

[0025] In some embodiments of the present application, the cover is an insulating member.

[0026] By setting the cover as an insulating member, the cover of insulating material can isolate unnecessary conductive connection between the detection circuit and the battery cell shell or the external environment, reduce the risk of electric shock, and ensure the safety of the operator. At the same time, it can reduce the risk of conductive contact between electrical components in the external environment and the cover, which helps to protect the electrical components in the containment cavity and maintain the stable working state of the detection device.

[0027] In a second aspect, the present application provides a battery recycling system comprising the detection device according to any one of the embodiments of the first aspect.

[0028] 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 and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0030] Figure 1 This is a schematic diagram of the assembly structure of the detection device and the battery cell provided in some embodiments of this application;

[0031] Figure 2 This is an exploded view of the detection device provided in some embodiments of this application;

[0032] Figure 3 A schematic diagram of the structure of the detection device provided in some embodiments of this application from one perspective;

[0033] Figure 4 for Figure 3 A schematic cross-sectional view of the detection device shown along the AA direction;

[0034] Figure 5 This is a schematic diagram of the detection circuit provided in some embodiments of this application.

[0035] The attached figures are labeled as follows:

[0036] 100. Detection device;

[0037] 200. Battery cell; 201. Weak component;

[0038] 10. Cover; 11. Receiving cavity; 12. Limiting groove; 13. Mounting groove; 20. Circuit board; 21. Detection circuit; 30. Detector; 40. Elastic conductive component; 50. Fixing component; 51. Through hole; 60. Alarm device; 70. Power supply. Detailed Implementation

[0039] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a reference to the plural and vice versa.

[0041] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0042] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments, and is not necessarily mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0044] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0045] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application, which do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0047] Currently, with the rapid development of new energy vehicles, the battery devices of new energy vehicles and other electrical equipment are usually recycled after use. After recycling, the individual battery cells in the battery device are usually tested for quality to determine whether the individual battery cells can be reused.

[0048] Battery cells typically have a pressure relief mechanism, which usually includes a weak component. This weak component is generally located inside and sealed within the pressure relief port. The weak component can be ruptured when the internal pressure or temperature of the battery cell reaches a preset threshold, thus releasing pressure. Therefore, during the use of a battery cell, even if the weak component is not ruptured, it will often bulge locally due to the internal pressure. If the bulge height exceeds a maximum limit, the battery cell becomes unusable. However, conventional methods cannot quickly detect whether the bulge height of the weak component exceeds the limit. Therefore, there is an urgent need to design a detection device that can detect whether the bulge height of the weak component in the pressure relief mechanism exceeds the limit.

[0049] To address the problem that conventional methods cannot quickly detect whether the protrusion height of weak components exceeds the limit, this application designs a detection device. The detection device provided by this application can quickly detect whether the protrusion height of weak components of the pressure relief mechanism exceeds the standard, so as to facilitate the screening of reusable battery cells.

[0050] The detection device disclosed in this application is used in a battery recycling system, specifically for detecting whether the protrusion height of the weak component of the pressure relief mechanism on a battery cell exceeds the limit, so as to screen out reusable battery cells.

[0051] Please see Figures 1 to 5 , Figure 1 This is a schematic diagram of the assembly structure of the detection device and the battery cell provided in some embodiments of this application; Figure 2 This is an exploded view of the detection device provided in some embodiments of this application; Figure 3 A schematic diagram of the structure of the detection device provided in some embodiments of this application from one perspective; Figure 4 for Figure 3 A schematic cross-sectional view of the detection device shown along the AA direction; Figure 5A structural schematic diagram of a detection circuit provided for some embodiments of the present application. According to some embodiments of the present application, a detection device 100 is provided for detecting a pressure relief mechanism arranged at a pressure relief port of a battery cell, the detection device 100 comprising a cover 10, a circuit board 20 and at least one set of detection components. The cover 10 has a receiving cavity 11, and the cover 10 is arranged to cover the pressure relief port. The circuit board 20 is arranged in the cover 10, and the circuit board 20 is provided with a detection circuit 21. A power supply 70 is connected in series with the detection circuit 21. The at least one set of detection components is arranged in the receiving cavity 11, and each set of detection components comprises two detection members 30 connected in series with the detection circuit 21 and arranged to extend into the pressure relief port. A first end of each detection member 30 is electrically connected with the detection circuit 21, and a second end of each detection member 30 is configured to make electrical contact with a weak part 201 of the pressure relief mechanism when a protrusion height of the weak part 201 exceeds a maximum limit value, wherein the second ends of the two detection members of each set of detection components are arranged to detect different positions of the weak part.

[0052] In the embodiments of the present application, the battery cell 200 can be a secondary battery, which refers to a battery cell 200 that can be activated by charging after discharging.

[0053] In the embodiments of the present application, the pressure relief mechanism is arranged to discharge the internal gas of the battery cell 200. As an example, the pressure relief mechanism is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 200 reaches a predetermined threshold value. For example, when the internal pressure or temperature of the battery cell 200 reaches a predetermined threshold value, the weak structure in the pressure relief mechanism is broken, thereby forming an opening or passage for the internal pressure or temperature to be released. The threshold value is designed differently according to different design requirements.

[0054] As an example, when the battery cell 200 is shipped, the weak part 201 has an initial reference surface, wherein the height of the middle part of the initial reference surface is higher than the height of the edge region.

[0055] It can be understood that the weak part 201 may, even if not broken, also locally protrude due to the internal pressure of the battery cell 200, and the weak part 201 will be broken when the protrusion height of the weak part 201 reaches a maximum limit value.

[0056] The maximum limit of the protruding height of the weak part 201 is affected by the material, thickness of the weak part 201, the specifications of the battery cell 200 (such as capacity, size), and the use scenario, and the set value is different. As an example, the maximum limit of the protruding height of the weak part 201 is that the weak part 201 protrudes from the initial reference surface by 0.3mm-5mm. That is, the position of the second end of the detection piece 30 extending into the pressure relief port can be within the range of 0.3mm-5mm from the height of the initial reference surface of the weak part 201.

[0057] As an example, the shape of the cover 10 is matched with the shape of the pressure relief port.

[0058] As an example, a mounting groove can be arranged in the cover 10, and the circuit board 20 can be embedded in the mounting groove.

[0059] As an example, the pressure relief mechanism is mounted in the pressure relief port, and part of it protrudes out of the pressure relief port to form an annular boss. The cover 10 is tightly connected with the annular boss.

[0060] As an example, the detection piece 30 can be an electrically conductive piece such as a detection needle or a detection rod.

[0061] As an example, the power supply 70 can be an external power supply or a battery. When the power supply 70 is a battery, the battery can be integrally arranged outside the cover 10, so that the detection device 100 can complete the detection independently without relying on an external power supply, improving the portability of the device, and flexibly adapting to detection requirements in different places, while simplifying the external connection circuit of the device and reducing the complexity of on-site operation.

[0062] According to the detection device 100 provided in the present application, before detection, the cover 10 can be covered on the pressure relief port of the battery cell 200 to make the containing cavity 11 communicate with the pressure relief port. Since the circuit board 20 is arranged in the cover 10, the detection circuit 21 on the circuit board 20 forms an electrically conductive path with the detection assembly, and the two detection pieces 30 of the detection assembly extend into the pressure relief port and are aligned with the weak part 201. The second end of the detection piece 30 can be set corresponding to the maximum limit of the protruding height of the weak part 201, and when the protruding height of the weak part 201 exceeds the maximum limit, the surface of the weak part 201 will form an electrically conductive contact with the second ends of the two detection pieces 30 at the same time, making the detection circuit 21 conductive, so that the operator can directly judge the protruding abnormality of the weak part 201 through the on-off state of the circuit, without complex measurement operation, and the detection time can be greatly shortened, which is suitable for batch detection in the battery recycling link.

[0063] Please refer to Figure 2 , Figure 4 and Figure 5According to some embodiments of the present application, each group of detection components further comprises two elastic conductive members 40, and one elastic conductive member 40 is electrically connected between the first end of each detection member 30 and the detection circuit 21.

[0064] As an example, the elastic conductive member 40 can be a spring.

[0065] By electrically connecting one end of each elastic conductive member 40 to the detection circuit 21 and the other end to the first end of the detection member 30, the elastic conductive member 40 is connected in series between the detection member 30 and the detection circuit 21. When the second end of the detection member 30 comes into contact with the weak part 201, the elastic conductive member 40 will adaptively deform with the contact pressure, allowing the second end of the detection member 30 to maintain stable electrical contact with the weak part 201, and at the same time buffering the force during contact to reduce mechanical damage to the weak part 201 and improve the safety of the detection device 100.

[0066] Please refer to Figure 4 According to some embodiments of the present application, the cover 10 has a first wall facing the weak part 201, and the first wall is provided with a limiting groove 12, and the number of limiting grooves 12 is the same as the number of elastic conductive members 40, and each elastic conductive member 40 is arranged in a corresponding limiting groove 12.

[0067] As an example, the first wall is also provided with a mounting groove, and the circuit board 20 is arranged in the mounting groove, and the limiting groove 12 is in communication with the mounting groove, so that when the elastic conductive member 40 is mounted in the limiting groove 12, it can be electrically connected with the detection circuit 21 on the circuit board 20.

[0068] The first wall of the cover 10 faces the weak part 201, and by arranging the limiting groove 12 corresponding to the number of elastic conductive members 40 on the first wall, and arranging one elastic conductive member 40 in each limiting groove 12, the limiting groove 12 can constrain the elastic conductive member 40 in the circumferential direction, reducing the risk of lateral deviation of the elastic conductive member 40 during assembly or deformation, and helping to improve the stability of the electrical connection between the elastic conductive member 40, the detection member 30 and the detection circuit 21, while making the installation of the elastic conductive member 40 in the accommodation cavity 11 more regular, so as to make rational use of the internal space of the accommodation cavity 11.

[0069] Please refer to Figure 4 According to some embodiments of the present application, the number of detection components is multiple groups, and the multiple groups of detection components are arranged in parallel with the detection circuit 21, and the second ends of the detection members 30 in the multiple groups of detection components are configured to have different setting heights in the pressure relief port.

[0070] As an example, since the surface height of the middle part of the weak part 201 is higher than the surface height of the edge area thereof, the height of the second end of the plurality of detection members 30 can be adapted to the shape of the weak part 201, that is, the height of the second end of the detection member 30 arranged corresponding to the middle part of the weak part 201 is higher, and the height of the second end of the detection member 30 arranged corresponding to the edge area of the weak part 201 is lower.

[0071] By arranging a plurality of detection assemblies in parallel in the detection circuit 21, and adjusting the installation height of the second end of the detection member 30 in each detection assembly according to the maximum limit value of the protrusion height of the weak part 201, the second end of the detection member 30 in different detection assemblies forms a gradient height distribution according to the shape of the weak part 201. When the weak part 201 protrudes beyond the maximum limit, it will sequentially contact the detection members 30 corresponding to the height of the protrusion, and the two detection members 30 of the detection assembly corresponding to the set height will simultaneously conductively contact the weak part 201, so as to make the detection circuit 21 conductive, and further to judge the abnormal protrusion of the weak part 201.

[0072] Please refer to Figure 2 and Figure 4 According to some embodiments of the present application, the detection device 100 further comprises a fixing member 50 arranged in the accommodation cavity 11 and connected with the inner wall surface of the accommodation cavity 11; wherein the fixing member 50 is provided with at least one through hole 51, and the two detection members 30 of each detection assembly are arranged through one through hole 51.

[0073] As an example, the number of through holes 51 is multiple, and the multiple through holes 51 are arranged in an array on the fixing member 50, and the number of through holes 51 can be the same as the number of detection assemblies.

[0074] By arranging the fixing member 50 in the accommodation cavity 11 and connecting it with the inner wall surface of the accommodation cavity 11, and arranging the through holes 51 on the fixing member 50 which match the number of detection assemblies, the two detection members 30 of each detection assembly are arranged through one through hole 51, the through hole 51 can axially guide and radially limit the detection member 30, so that the second end of the detection member 30 can accurately align with the preset detection area of the weak part 201, and reduce the risk of short circuit caused by contact between the detection members 30 of adjacent detection assemblies, and reduce the risk of skew or misplacement of the detection member 30 when contacting the weak part 201, which helps to improve the reliability of the detection result.

[0075] Please refer to Figure 4 According to some embodiments of the present application, the inner wall surface of the accommodation cavity 11 is provided with a mounting groove 13 extending along the circumference of the accommodation cavity 11, and the fixing member 50 is embedded in the mounting groove 13.

[0076] As an example, the circumferential edge of the fixing member 50 is provided with a flange.

[0077] When the fixing member 50 is installed, a mounting groove 13 extending along the circumference of the inner wall surface of the accommodating cavity 11 can be arranged, and the edge of the fixing member 50 is embedded in the mounting groove 13, so that the fixing member 50 can be fixed and installed, and the structure and principle are relatively simple and easy to implement.

[0078] According to some embodiments of the present application, the inner wall surface of the accommodating cavity 11 is provided with a stepped surface, and the fixing member 50 is arranged on the stepped surface.

[0079] For example, the cover 10 can include a main body portion and an extension portion, the main body portion is installed with the circuit board 20, and the main body portion is defined with the accommodating cavity 11 having an opening, and the extension portion is connected to one end of the main body portion having the opening, and the inner wall surface of the extension portion protrudes from the inner wall surface of the main body portion and forms a stepped surface with the inner wall surface of the main body portion.

[0080] By arranging the stepped surface on the inner wall surface of the accommodating cavity 11, a stable installation reference is provided for the fixing member 50, and by placing the fixing member 50 on the stepped surface and connecting the fixing member 50 with the inner wall surface of the accommodating cavity 11, the risk of the fixing member 50 loosening and causing the probe member 30 to be positioned off during detection is reduced, and the assembly process of the fixing member 50 is facilitated, the difficulty of assembling the device is reduced, and the efficiency of assembling the product is improved.

[0081] According to some embodiments of the present application, the fixing member 50 is an insulating member.

[0082] For example, the fixing member 50 can be a rubber member, a silica gel member or a plastic member, etc.

[0083] By setting the fixing member 50 as an insulating member, the fixing member 50 made of insulating material can block the conductive path formed between the probe members 30 of different probe assemblies through the fixing member 50, so that the detection logic of each probe assembly can be independently operated, to reduce the short circuit or misdirecting phenomenon between the probe assemblies, and to reduce the influence of circuit interference on the detection result, and to improve the accuracy of the detection result.

[0084] Please refer to Figure 2 and Figure 4 According to some embodiments of the present application, the detection device 100 further includes a warning device 60 connected in series with the detection circuit 21, for issuing a warning signal when the weak part 201 protrudes to contact the two probe members 30 of the probe assembly.

[0085] For example, the warning device 60 can be a light-emitting lamp, a voice prompter or an alarm, etc. The warning device 60 is arranged outside the cover 10.

[0086] When the protrusion height of the weak part 201 exceeds the maximum limit value, and the two detection pieces 30 of a certain group of detection assemblies simultaneously form a conductive contact, the corresponding detection circuit 21 is turned on, triggering the alarm 60 to issue an audible and light warning signal. This process does not require additional observation of the on-off state of the circuit by the operator, and the detection result of the protrusion height of the weak part 201 exceeding the limit can be quickly obtained through the warning signal, thereby shortening the result identification time, especially suitable for batch detection scenarios, and further improving the overall efficiency of the detection work. According to some embodiments of the present application, the cover 10 is an insulating piece.

[0087] As an example, the cover 10 can also be a rubber piece, a silica gel piece, or a plastic piece, etc.

[0088] By setting the cover 10 as an insulating piece, the cover 10 of insulating material can insulate the detection circuit 21 from unnecessary conductive connection between the battery monomer 200 shell or the external environment, reduce the risk of electric leakage, and protect the safety of the operator; At the same time, it can reduce the risk of conductive contact between the electrical components in the external environment and the cover 10 to form a conductive path, which helps to protect the electrical components in the containing cavity 11 and maintain the stable working state of the detection device 100.

[0089] According to some embodiments of the present application, referring to Figures 1 to 5 , the present application provides a detection device 100 for detecting a pressure relief mechanism provided at a pressure relief port of a battery monomer, the pressure relief mechanism having a weak part provided in the pressure relief port and blocked at the pressure relief port. The detection device 100 includes a cover 10, a circuit board 20, a fixing piece 50, an alarm 60, a power supply 70, a plurality of detection assemblies, and a plurality of elastic conductive pieces 40. The cover 10 has a containing cavity 11, and the cover 10 is used to cover the pressure relief port of the battery monomer 200. The circuit board 20 is provided on the cover 10, and the circuit board 20 is provided with a detection circuit 21; a plurality of detection assemblies are provided in the containing cavity 11, each detection assembly includes two detection pieces 30, the two detection pieces 30 are connected in series to the detection circuit 21, and are used to extend into the pressure relief port, each detection piece 30 is conductively connected with an elastic conductive piece 40 between the first end and the detection circuit, and the second end of each detection piece 30 is configured to be capable of conductive contact with the weak part 201 when the protrusion height of the weak part 201 exceeds the maximum limit value. The fixing piece 50 is provided in the containing cavity 11 and connected with the inner wall surface of the containing cavity 11, and the fixing piece 50 is provided with a plurality of through holes 51, and the two detection pieces 30 of each detection assembly are correspondingly provided in one through hole 51. The alarm 60 is connected in series with the detection circuit 21. The power supply 70 is connected in series with the detection current for providing electric energy. Through the detection device 100 of the present application, the protrusion height of the weak part 201 can be quickly detected to determine whether it exceeds the limit, so as to screen out the reusable battery monomer 200.

[0090] According to some embodiments of the present application, the present application also provides a battery recycling system comprising the detection device 100 according to any one of the above embodiments.

[0091] The battery recycling system comprises the detection device 100 according to any one of the above embodiments. After the battery cell 200 is recycled, the cover 10 of the detection device 100 is quickly covered on the pressure relief port, and the detection process is started. The detection device 100 can quickly determine whether the protrusion height of the weak part 201 is out of limit, so as to screen out the recyclable battery cell 200. Without complex manual detection steps, it helps to optimize the overall process of battery recycling, reduce invalid sorting operations, and improve the efficiency and accuracy of recycling work.

[0092] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A detection device for detecting a pressure relief mechanism provided at a pressure relief port of a battery cell, characterized by, The detection device comprises: a cover body provided with a receiving cavity, the cover body being used to cover the pressure relief port; a circuit board provided in the cover body, the circuit board being provided with a detection circuit; a power supply connected in series with the detection circuit; at least one set of detection components provided in the receiving cavity, each set of the detection components comprising two detection members connected in series with the detection circuit and used to extend into the pressure relief port, a first end of each of the detection members being conductively connected with the detection circuit, a second end of each of the detection members being configured to be conductively contacted with a weak part of the pressure relief mechanism, and the second ends of the two detection members of each set of the detection components being used to detect different positions of the weak part.

2. The detection device of claim 1, wherein, Each set of the detection components further comprises two elastic conductive members, one of the elastic conductive members being conductively connected between the first end of each of the detection members and the detection circuit.

3. The detection device of claim 2, wherein, The cover body has a first wall used to face the weak part, the first wall being provided with limiting grooves, the number of the limiting grooves being the same as the number of the elastic conductive members, and each of the elastic conductive members being correspondingly arranged in one of the limiting grooves.

4. The detection device according to any one of claims 1 to 3, characterized in that, The number of the detection components is multiple sets, the multiple sets of the detection components being connected in parallel with the detection circuit, and the second ends of the detection members in the multiple sets of the detection components being configured to have different arrangement heights in the pressure relief port.

5. The detection device according to any one of claims 1 to 3, characterized in that The detection device further comprises a fixing member arranged in the receiving cavity and connected with an inner wall surface of the receiving cavity; wherein the fixing member is provided with at least one through hole, and the two detection members of each set of the detection components are arranged through the through hole.

6. The detection device of claim 5, wherein, The inner wall surface of the receiving cavity is provided with a mounting groove extending along a circumferential direction of the receiving cavity, and the fixing member is embedded in the mounting groove. Alternatively, the inner wall surface of the receiving cavity is provided with a stepped surface, and the fixing member is arranged on the stepped surface.

7. The detection device of claim 5, wherein, The fixing member is an insulating member.

8. The detection device according to any one of claims 1 to 3, characterized in that The detection device further comprises a warning device connected in series with the detection circuit and used to send a warning signal in a case where the weak part protrudes to contact the two detection members of the detection components.

9. The detection device according to any one of claims 1 to 3, characterized in that, The cover body is an insulating member.

10. A battery recycling system characterized by, The detection device comprises any one of claims 1-9.

Images