Battery tray assembly, battery pack and vehicle

Abstract

A battery tray assembly (10), a battery pack (1), and a vehicle. The battery tray assembly (10) includes a tray (11) and a conductive member (12), the tray (11) forming a mounting space for accommodating battery modules (20) and insulating the battery modules (20) from one another, the tray (11) having a detection port (111), the conductive member (12) at least partially disposed within the tray (11) and electrically connected to a predetermined potential point, and the conductive member (12) at least partially exposed from the detection port (111).

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to and the benefit of Chinese Patent Application No. 202222639056.4, filed on September 30, 2022. The entire contents of the above application are incorporated herein by reference.

[0002] The present disclosure relates to a battery tray assembly, a battery pack, and a vehicle. [Background technology]

[0003] In the related art, a battery tray assembly in a battery pack includes an insulating detection member for detecting a ground fault in the battery pack. In the related art, the insulating detection member of the battery tray assembly is constructed as an aluminum rod. If the battery pack is subjected to a mechanical shock, the entire aluminum rod may come into contact with multiple battery cores of the battery, resulting in a short circuit and arc sparks between the battery cores. Such a battery pack is unsafe. Summary of the Invention

[0004] The present disclosure is intended to solve at least one of the technical problems of the related art. Accordingly, an object of the present disclosure is to provide a battery tray assembly in which conductive members are concealed to prevent the conductive members from being unintentionally contacted when the battery module is subjected to an external force, thereby ensuring the safety of the battery pack.

[0005] The present disclosure further provides a battery pack having a battery tray assembly.

[0006] The present disclosure further provides a vehicle having a battery pack.

[0007] A battery tray assembly according to the present disclosure includes a tray having a mounting space formed thereon configured to receive a battery module, the tray having a detection port formed therein, and the tray configured to be insulated from the battery module; and a conductive member at least partially disposed within the tray, the conductive member electrically connected to a predetermined potential point, and the conductive member at least partially exposed from the detection port for detecting whether a conductive medium is present in the detection port.

[0008] According to the battery tray assembly of the present disclosure, a detection port is provided, so that at least a portion of the conductive member is exposed through the detection port, thereby enabling the presence of a conductive medium in the tray to be detected while preventing the conductive member from being unintentionally contacted when the battery module is subjected to an external force, and realizing concealment of the conductive member, thereby ensuring safety when using the battery pack.

[0009] A battery pack according to the present disclosure includes a battery tray assembly.

[0010] A battery pack according to the present disclosure includes a battery tray assembly configured as any one of the battery tray assemblies described above, and a battery module disposed in the mounting space. Because the battery pack according to the present disclosure includes the battery tray assembly described above, detection of leakage current in the battery pack is more efficient, accurate, and sensitive, and the conductive members are concealed to prevent the conductive members from contacting two battery cores at the same time, thereby ensuring safety when using the battery pack.

[0011] A vehicle according to the present disclosure includes a battery pack.

[0012] The vehicle according to the present disclosure includes the battery pack of the above example. Because the vehicle according to the present disclosure includes the battery pack of the above example, the vehicle can detect whether leakage of electrolyte solution or accumulation of water occurs in the battery pack and provide a warning to alert the user as needed, thereby avoiding safety-related accidents.

[0013] Other aspects and advantages of the disclosure will be set forth in the description that follows, and some of them will be obvious from the description, or may be learned by practice of the disclosure. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a structural diagram of a battery pack according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an enlarged view of a circled portion A in FIG. [Figure 3] FIG. 2 is a structural diagram of a tray according to an embodiment of the present disclosure. [Figure 4] FIG. 4 is an enlarged view of the circled portion B in FIG. 3. [Figure 5] FIG. 10 is a structural diagram of the interior of a base plate according to one embodiment of the present disclosure. [Figure 6] 1 is a structural diagram of a conductive member according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0015]

[0013] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, in which the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended for illustration purposes only and are not to be construed as limiting the present disclosure.

[0016] A battery tray assembly 10 according to an embodiment of the present disclosure is described below with reference to FIGS.

[0017] As shown in FIG. 3 , a battery tray assembly 10 according to the present disclosure includes a tray 11 and a conductive member 12. A mounting space configured to accommodate a battery module 20 is formed in the tray 11. The tray 11 is provided with a detection port 111. The tray 11 is configured to be insulated from the battery module 20. The conductive member 12 is at least partially disposed within the tray 11. The conductive member 12 is electrically connected to a predetermined potential point. The conductive member 12 is at least partially exposed from the detection port 111 to detect whether a conductive medium is present in the detection port 111. In some embodiments, the tray 11 is constructed as an insulating component, and the battery module 20 is mounted within the mounting space. After the conductive medium enters the battery tray assembly 10, the conductive medium exists in the gap between the battery module 20 and the tray 11. The conductive medium can conduct electric current. After the conductive medium flows along the tray 11 to the detection port 111, the conductive member 12 comes into contact with the conductive medium to form an electrical connection, and the conductive medium flowing along the tray 11 electrically connects the battery module 20 and the conductive member 12. Since the conductive member 12 is connected to a predetermined potential point, i.e., the potential of the conductive member 12 is equal to the potential of the predetermined potential point, whether the conductive medium is present in the tray 11 of the battery pack 1 can be detected by detecting the potential difference between the battery module 20 and the conductive member 12 at this time.

[0018] It can be understood that when no conductive medium is present in the mounting space, the conductive member 12 is used to generate a first potential signal between the battery module 20 and a predetermined potential point, and when a conductive medium is present in the mounting space, the conductive member 12 connects the battery module 20 to the predetermined potential point via the conductive medium to generate a second potential signal between the battery module 20 and the predetermined potential point. The battery management system of the battery pack 1 monitors the potential signals in real time. The first potential signal and the second potential signal can indicate whether a conductive medium is present in the mounting space. When the potential signal between the battery module 20 and the conductive member 12 changes (i.e., when the battery management system detects a change in the potential signal from the first potential signal to the second potential signal), it can be determined that a conductive medium is present in the mounting space, i.e., a leakage current has occurred in the battery pack 1.

[0019] Additionally, the conductive medium may be an electrolyte solution leaked from the battery pack 1, water seeping in from the outside due to poor pack sealing, condensed water generated within the pack, water accumulated in the tray 11 containing conductive cations and anions, or any other medium capable of electrically connecting the battery module 20 and the conductive member 12.

[0020] Furthermore, the predetermined potential point is generally located outside the mounting space. The conductive member 12 may be disposed on the tray 11, with the entire conductive member 12 disposed within the mounting space, or the conductive member 12 may be electrically connected to another conductive structure, which may electrically connect the conductive member 12 to the predetermined potential point. Alternatively, the conductive member 12 may be disposed on the tray 11, with a portion of the conductive member 12 disposed within the mounting space, and another portion of the conductive member 12 extending outside the mounting space and connected to the predetermined potential point, which is not limited herein.

[0021] In some embodiments, in order to avoid a short circuit between the battery cores 21 caused by a large-area contact between the battery module 20 and the conductive member 12 after the battery pack 1 is impacted by an external force, at least a portion of the conductive member 12 is disposed in the tray 11, and in order to enable the conductive member 12 to detect the conductive medium, it is necessary for at least a portion of the conductive member 12 to contact the conductive medium flowing in the mounting space; therefore, a detection port 111 is provided on at least a portion of the inner wall of the mounting space, thereby exposing at least a portion of the conductive member 12 from the detection port 111, so that when the conductive medium flows into the detection port 111, the conductive member 12 can detect the conductive medium.

[0022] According to the battery tray assembly 10 of the present disclosure, a detection port 111 is provided, which exposes at least a portion of the conductive member 12 through the detection port 111. In this way, the presence of a conductive medium in the tray 11 can be detected while preventing the conductive member 12 from being unintentionally contacted when the battery module 20 is subjected to an external force, and the conductive member 12 is concealed, thereby ensuring safety when using the battery pack 1.

[0023] According to some embodiments of the present disclosure, as shown in FIG. 3 , the tray 11 includes a base plate 112 and a side plate 113. The detection port 111 is formed in the base plate 112. The side plate 113 is disposed on the outer periphery of the base plate 112. A mounting space configured to accommodate the battery module 20 is defined by the side plate 113 and the base plate 112. In some embodiments, a conductive medium flows along the bottom of the tray 11 under gravity, and the base plate 112 forms the bottom wall of the mounting space of the tray 11. The detection port 111 is provided in the base plate 112 to allow the conductive medium to flow to the detection port 111 under gravity. In some embodiments, at least a portion of the conductive member 12 is disposed at the lowest point of the detection port 111. When the conductive medium flows into the detection port 111, the conductive member 12 can immediately detect the conductive medium, thereby enabling a leakage current of the battery pack 1 to be determined at any time to ensure safety when using the battery pack 1. In some embodiments, the base plate 112 includes a first surface facing the mounting space, the detection port 111 is formed on the first surface of the base plate 112 and extends away from the first surface to form a detection space within the base plate 112, the detection space is in communication with the mounting space via the detection port 111, the conductive medium on the tray 11 enters the detection space through the detection port 111, at least a portion of the conductive member 12 is located at the lowest point of the detection space, and the detection space is configured to collect the conductive medium, thereby accurately and quickly detecting the conductive medium.

[0024] According to some embodiments of the present disclosure, as shown in FIGS. 1-2 , the battery tray assembly 10 further includes a frame 13. The frame 13 is disposed on at least a portion of the outer periphery of the tray 11. At least a portion of the conductive member 12 extends into the frame 13 and is electrically connected to the frame 13. The frame 13 is configured as a grounding member. In some embodiments, the frame 13 is disposed on at least a portion of the outer periphery of the tray 11 and is grounded. In some embodiments, the frame 13 may be configured as a metal part. The frame 13 is configured to improve the rigidity of the tray 11. The frame 13 may be connected to the vehicle body by a ground wire and thus be grounded. At least a portion of the conductive member 12 is connected to the frame 13 and thus be grounded.

[0025] According to some embodiments of the present disclosure, as shown in FIGS. 5 and 6 , the conductive member 12 includes an extension portion 121 and a connection portion 122. The extension portion 121 is formed on the base plate 112, and at least a portion of the extension portion 121 faces the detection port 111 and is exposed to the detection port 111. One end of the connection portion 122 is connected to the extension portion 121, and another end of the connection portion 122 extends to the side plate 113 and is electrically connected to the frame 13. In some embodiments, as shown in FIG. 6 , the extension portion 121 of the conductive member 12 is mounted on the base plate 112, and at least a portion of the extension portion 121 is exposed through the detection port 111 to detect a conductive medium. The connection portion 122 of the conductive member 12 is connected to the extension portion 121 and extends in a direction away from the extension portion 121. The connection portion 122 is electrically connected to the frame 13, thereby grounding the conductive member 12. In some embodiments, a plurality of connecting portions 122 are connected to the extension portion 121, and the connecting portions 122 are connected to the frame 13 by fasteners, and the frame 13 is connected to the body of the vehicle to form a transmission path for detecting electrical leakage. The extension portion 121 may be tailored to fit the shape of the base plate 112, and the connecting portions 122 may be tailored to fit the shape of the side plate 113. The connecting portions 122 may be configured to have a curved shape tailored to fit the side plate, and are not limited to the linear structure that fits the side plate 113 shown in FIG. 6.

[0026] It should be noted that the connection portion 122 being installed on the side plate 113 may mean that the connection portion 122 is installed inside the side plate 113, or that the connection portion 122 is installed on the surface of the side plate 113 adjacent to the mounting space, and this is not limited in this specification.

[0027] According to some embodiments of the present disclosure, as shown in FIG. 4 , a plurality of detection ports 111 are configured, and extension portions 121 extend in a first direction. The plurality of detection ports 111 are arranged in series in the first direction, and each extension portion 121 corresponds to each of the plurality of detection ports 111. In some embodiments, the plurality of detection ports 111 may be distributed at various positions on the base plate 112 along multiple directions of the base plate 112 to continuously detect a conductive medium present in the mounting space. In some embodiments, the plurality of detection ports 111 are arranged in the first direction of the base plate 112 and arranged in series in the first direction. When a conductive medium flows through any one of the detection ports 111, the extension portions 121 correspond to the plurality of detection ports 111, so that the extension portions 121 can detect the conductive medium when the conductive medium flows through any one of the detection ports 111. Therefore, the battery pack 1 can accurately detect a leakage location, achieving more accurate and sensitive detection. In some embodiments, the first direction is the stacking direction of the battery cores 21 of the battery module 20.

[0028] According to some embodiments of the present disclosure, as shown in FIG. 3 , support ribs 114 protruding toward the mounting space are formed on the base plate 112. The support ribs 114 are configured to support the battery modules 20 and space the battery modules 20 from the bottom wall of the mounting space. In some embodiments, the base plate 112 is configured as the bottom wall of the mounting space. When a conductive medium enters the battery tray assembly 10, the conductive medium exists in the gap between the battery modules 20 and the tray 11. To prevent the conductive medium from penetrating into the battery modules 20 and resulting in electrolysis of the aluminum housing of the battery core 21, the support ribs 114 protruding toward the mounting space are disposed on the base plate 112 to support the battery modules 20, thereby separating the battery modules 20 from the base plate 112 by the gap. In this way, a space is provided for the conductive medium to flow, preventing the conductive medium from directly immersing the battery pack 20. When the battery pack 1 vibrates, the battery pack 20 is electrically connected to the conductive member 12 by the conductive medium, thereby allowing detection of water contained in the pack or liquid leaked from the pack. In some embodiments, the support ribs 114 extend in a first direction of the base plate 112 and are spaced apart in a second direction. In some embodiments, the battery cores 21 in the battery modules 20 extend in the second direction and are spaced apart in the first direction, and the support ribs 114 support the battery modules 20 and space them from the bottom wall of the installation space.

[0029] 5 , at least a portion of the conductive member 12 is disposed within the tray 11 by integral molding. In some embodiments, the extensions 121 of the conductive member 12 are integrally formed with and disposed within the base plate 112 of the tray 11, the connection portions 122 of the conductive member 12 are integrally formed with and disposed within the side plates 113 of the tray 11, and the free ends of the connection portions 122 are electrically connected to the frame 13. The conductive members 12 of the tray 11 are formed by hot pressing, thereby effectively reducing the cost of the battery tray assembly 10. In addition, the extensions 121 of the conductive member 12 are pre-embedded in the base plate 112, and the detection ports 111 are provided at equal intervals on the base plate 112 only in the arrangement direction of the battery cores 21 to detect electrical leakage. This reduces the number of battery cores 21 that are contacted by the conductive member 12 as much as possible to prevent short circuits when the battery pack 1 is subjected to mechanical shock. The extension portion 121 covers the longitudinal sides of all stacked battery cores 21, and when the conductive medium comes into contact with the conductive member 12 at the detection port 111, a leakage signal can be generated, allowing the battery pack 1 to provide feedback on the leakage location.

[0030] In some embodiments of the present disclosure, a battery tray assembly 10 includes a tray 11, a conductive member 12, and a frame 13. The tray 11 is configured as an insulator and includes a base plate 112 and a side plate 113. The base plate 112 includes a first surface facing the mounting space. A detection port 111 is formed in the first surface of the base plate 112 and extends away from the first surface to form a detection space within the base plate 112. The detection space communicates with the mounting space via the detection port 111. The side plate 113 is disposed on the outer periphery of the base plate 112. The mounting space is defined by the side plate 113 and the base plate 112. The battery module 20 is placed within the mounting space. Support ribs 114 protruding toward the mounting space are disposed on the base plate 112. The support ribs 114 extend in a first direction of the base plate 112 and are spaced apart in a second direction. The frame 13 is disposed around the outer periphery of the base plate 112. The frame 13 is grounded. A plurality of detection ports 111 are disposed at equal intervals on the first surface of the base plate 112 in the arrangement direction of the battery cores 21 of the battery module 20. Each detection port 111 faces the end of only one battery core 21. The conductive member 12 includes an extension 121 and a connection portion 122. The extension 121 is formed on the base plate 112 of the tray 11, and at least a portion of the extension 121 is located at the lowest point of the detection space. The extension 121 covers the longitudinal direction of all stacked battery cores 21. The connection portion 122 is connected to the extension 121 and extends away from the extension 121. The connection portion 122 is electrically connected to the frame 13, thereby grounding the conductive member 12.

[0031] After the conductive medium enters the battery tray assembly 10, it can flow along the base plate 112 of the tray 11 to the detection port 111 and enter the detection space, and the extension 121 will contact the conductive medium to form an electrical connection between the battery module 20 and the conductive member 12, so that the connection part 122 is electrically connected to the frame 13 and thus grounded. The potential difference between the battery module 20 and the conductive member 12 will change after the conductive medium comes into contact with the conductive member 12, allowing the battery pack 1 to detect leakage current in time and accurately locate the leakage point.

[0032] According to the battery tray assembly 10 of the present disclosure, detecting conductive media at multiple locations in the tray 11 is achieved by integrally molding the conductive member 12 and the tray 11 and providing multiple detection ports 111 on the base plate 112 of the tray 11. Detection at multiple locations is faster and reduces the possibility of missed detection. Therefore, leakage current detection is performed more accurately and with higher sensitivity at any time, thereby ensuring safety when using the battery pack 1.

[0033] A battery pack 1 according to the present disclosure is briefly described below.

[0034] As shown in FIGS. 1 and 2 , a battery pack 1 according to the present disclosure includes a battery tray assembly 10 and a battery module 20. The battery tray assembly 10 is configured as any one of the battery tray assemblies 10 according to the above-described embodiments. The battery module 20 is disposed in the mounting space. Because the battery pack 1 according to the present disclosure includes the battery tray assembly 10 according to the above-described embodiments, detection of leakage current in the battery pack 1 is more efficient, accurate, and sensitive, and the conductive member 12 is concealed, ensuring safety when using the battery pack 1.

[0035] According to some embodiments of the present disclosure, as shown in FIG. 2, the battery module 20 includes a plurality of battery cores 21, and one of the detection ports 111 faces one end of one of the battery cores 21 in the extending direction of the battery core 21. In some embodiments, each battery core 21 has two ends in its extending direction, and one detection port 111 directly faces the end of only one battery core 21. As a result, when a certain part of the battery pack 1 is mechanically impacted, the conductive member 12 in the detection port 111 is prevented from contacting two battery cores 21 simultaneously, thereby avoiding a short circuit.

[0036] According to some embodiments of the present disclosure, as shown in FIGS. 2 and 4, the thickness of the battery core 21 is defined as a, the dimension of the detection port 111 in the thickness direction of the battery core 21 is defined as b, and a > b. In some embodiments, it can be understood that the detection port 111 may be configured in any shape, and b may be the maximum dimension of the detection port 111 in the thickness direction of the battery core 21. In this case, b may be the diameter of the circumcircle of the detection port 111, and b satisfies a > b to ensure that the conductive member 12 can detect the conductive medium through the detection port 111, while at the same time preventing the conductive member 12 from contacting two battery cores 21.

[0037] According to some embodiments of the present disclosure, as shown in FIGS. 2 and 4, the thickness of the battery core 21 and the dimension of the detection port 111 in the thickness direction of the battery core 21 satisfy 0.3a < b ≤ 0.7a. In some embodiments, the detection port 111 is configured to be circular, b is the diameter of the detection port 111, and b satisfies 0.3a < b ≤ 0.7a. This can ensure that the conductive member 12 can detect the conductive medium through the detection port 111, and at the same time, when a certain part of the battery pack 1 is mechanically impacted, it can also prevent the conductive member 12 in the detection port 111 from contacting two battery cores 21, thereby avoiding a short circuit and improving the accuracy when detecting liquid leaked from the pack or water in the pack.

[0038] A vehicle according to the present disclosure is briefly described below.

[0039] The vehicle according to the present disclosure includes the battery pack 1 of the above embodiment. Because the vehicle according to the present disclosure includes the battery pack 1 of the above embodiment, the vehicle can detect whether an electrolyte solution leak or water accumulation occurs and provide a warning to alert the user in time, thereby avoiding safety-related accidents.

[0040] Based on the above, according to the battery tray assembly 10 of the present disclosure, detecting conductive media at multiple locations in the tray 11 is achieved by integrally molding the conductive member 12 and the tray 11 and providing multiple detection ports 111 on the base plate 112 of the tray 11. Detection at multiple locations is faster and reduces the possibility of overlooking detection. Therefore, leakage current detection is performed more accurately and with higher sensitivity at all times. In addition, the conductive member 12 is concealed within the tray 11. The detection ports 111 are provided so that at least a portion of the conductive member 12 is exposed through the detection ports 111. In this way, the presence of conductive media in the tray 11 can be detected while preventing unintentional contact with the conductive member 12 when the battery module 20 is subjected to external force, thereby avoiding short circuits in the battery pack 1 and ensuring safety when using the battery pack.

[0041] In the description herein, references to terms such as "one embodiment," "some embodiments," "exemplary embodiments," "embodiment," "particular embodiment," or "any embodiment" mean that the specific feature, structure, material, or characteristic described in connection with that embodiment or embodiment is included in at least one embodiment or embodiment of the present invention. In this specification, exemplary references to the above terms do not necessarily refer to the same embodiment or embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner with one or more embodiments.

[0042] While embodiments of the present disclosure have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions, or variations can be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is as defined by the appended claims and their equivalents. [Explanation of symbols]

[0043] 1 battery pack 10 Battery tray assembly 11 Tray 111 detection port 112 Base Plate 113 Side Plate 114 Support rib 12 Conductive material 121 Stretching section 122 Connection 13 frames 20 Battery Module 21 Battery Core

Claims

1. a tray (11) having a mounting space formed thereon configured to accommodate a battery module (20), a detection port (111) provided in the tray (11), and the tray (11) configured to be insulated from the battery module (20); a conductive member (12), at least a portion of which is disposed inside the tray (11), the conductive member (12) being electrically connected to a predetermined potential point, and at least a portion of which is exposed from the detection port (111) for detecting whether a conductive medium is present in the detection port (111); A battery tray assembly (10) comprising:

2. The tray (11) a base plate (112) in which the detection port (111) is formed; and a side plate (113), the side plate (113) being disposed on the outer periphery of the base plate (112), and the mounting space configured to accommodate the battery module (20) being defined by the side plate (113) and the base plate (112); The battery tray assembly (10) of claim 1, comprising:

3. 3. The battery tray assembly (10) according to claim 1 or 2, further comprising a frame (13), the frame (13) being provided on at least a portion of the outer periphery of the tray (11), at least a portion of the conductive member (12) extending to the frame (13) and electrically connected to the frame (13), and the frame (13) being configured as a grounding member.

4. The conductive member (12) is an extension (121) formed on the base plate (112), at least a portion of the extension (121) facing the detection port (111) so as to be exposed from the detection port (111); a connecting portion (122), one end of which is connected to the extension portion (121), and another end of which extends to the side plate (113) and is electrically connected to the frame (13); The battery tray assembly (10) of any one of claims 1 to 3, comprising:

5. 5. The battery tray assembly (10) of claim 1, wherein a plurality of detection ports (111) are configured, the extension portion (121) extends in a first direction, the plurality of detection ports (111) are arranged in series in the first direction, and the extension portion (121) corresponds to each of the plurality of detection ports (111).

6. 6. The battery tray assembly (10) according to claim 1, wherein a support rib (114) protruding toward the mounting space is formed on the base plate (112), the support rib (114) being configured to support the battery module (20) and space the battery module (20) from a bottom wall of the mounting space.

7. The battery tray assembly (10) according to any one of claims 1 to 6, wherein at least a portion of the conductive member (12) is disposed on the tray (11) by integral molding.

8. A battery tray assembly (10), wherein the battery tray assembly (10) is configured as the battery tray assembly (10) of any one of claims 1 to 7; A battery module (20) disposed in the mounting space; The battery pack (1) comprises:

9. 9. The battery pack (1) according to claim 8, wherein the battery module (20) comprises a plurality of battery cores (21), and one of the detection ports (111) faces an end of one of the battery cores (21) in the extension direction of the battery cores (21).

10. The battery pack (1) according to claim 8 or 9, wherein a thickness of the battery core (21) is defined as a, and a dimension of the detection port (111) in the thickness direction of the battery core (21) is defined as b, and a > b.

11. The battery pack (1) according to any one of claims 8 to 10, wherein a thickness a of the battery core (21) and a dimension b of the detection port (111) in the thickness direction of the battery core (21) satisfy 0.3a < b ≦ 0.7a.

12. A vehicle comprising a battery pack (1) according to any one of claims 8 to 11.

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