Battery housing, battery, battery module and power device

Abstract

A power device (10000), comprising a battery module (1000). The battery module (1000) comprises a battery (100). The battery (100) comprises a battery housing (1). The battery housing (1) comprises a housing (10) and a first spacer ring (40), wherein an accommodating cavity is formed inside the housing (10), and the housing (10) is provided with a housing insertion hole (121); and the first spacer ring (40) is provided in the accommodating cavity, the first spacer ring (40) is provided with a spacer-ring insertion hole (41), and the housing insertion hole (121) and the spacer-ring insertion hole (41) are configured to allow an optical fiber (30) to pass therethrough.

Description

Battery housings, batteries, battery modules and power equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed on September 25, 2023, with application number 202311256388.7 and patent application name “Battery housing, battery, battery module and power equipment”, all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular, to a battery housing, a battery having the battery housing, a battery module having the battery, and a power device having the battery module. Background Art

[0004] In related technologies, optical fibers and optical sensors are used to monitor battery parameters such as temperature and strain. However, when fixing the optical fibers and optical sensors, some manufacturers will add an optical fiber tube inside the battery for arranging the optical fibers and optical sensors. The addition of the optical fiber tube causes great damage to the battery structure, occupies a large space, reduces the volume energy density of the battery, and to a certain extent affects the battery's charge and discharge performance.

[0005] Summary of the Invention

[0006] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present application proposes a battery housing that arranges optical fibers by providing housing implantation holes and spacer implantation holes, which is reasonable and has little impact on the battery housing.

[0007] The present application also provides a battery having the above-mentioned battery housing.

[0008] The present application also provides a battery module having the above-mentioned battery.

[0009] The present application also proposes a power device having the above-mentioned battery module.

[0010] According to an embodiment of the present application, the battery shell includes: a shell and a first spacer, a accommodating cavity is formed in the shell, and a shell implantation hole is provided on the shell; the first spacer is arranged in the accommodating cavity, and a spacer implantation hole is provided on the first spacer, and the shell implantation hole and the spacer implantation hole are used for passing the optical fiber.

[0011] According to the battery shell of the embodiment of the present application, the optical fiber is limited by passing the optical fiber through the shell implantation hole and the spacer ring implantation hole. At the same time, the optical fiber does not occupy too much space in the accommodating cavity, and the impact on the battery volume energy density is relatively small.

[0012] According to the second invention embodiment of the present application, the battery includes: a pole core, an optical fiber and the above-mentioned battery shell, the pole core is arranged in the accommodating cavity, the pole core includes a pole core body and a first pole ear located at one end of the pole core body facing the shell implantation hole; the first spacer is used to fix the first pole ear; the optical fiber passes through the shell implantation hole and the spacer implantation hole, the part of the optical fiber located in the accommodating cavity is provided with an optical sensor, the optical sensor is located in the accommodating cavity, and the optical sensor is used to detect the pole core body, and the part of the optical fiber located outside the accommodating cavity is used to connect the modulation and demodulation unit.

[0013] According to the battery of the embodiment of the present application, the optical fiber is limited by passing the optical fiber through the shell implantation hole and the spacer ring implantation hole. At the same time, the optical fiber does not occupy too much space in the accommodating cavity, and the impact on the volume energy density of the battery is relatively small.

[0014] According to some embodiments of the present application, the optical fiber is fixed to the inner wall of the housing.

[0015] According to some embodiments of the present application, the optical fiber includes: a first segment and a second segment, the first segment is located on the side of the first spacer facing the pole core body, the optical sensor is located on the first segment, and the first segment is at least partially fixed on the inner wall of the shell; the second segment is connected to the first segment, and the second segment is used to connect the modem unit.

[0016] According to some embodiments of the present application, the orientation of the spacer implantation hole is the same as that of the shell implantation hole; or, the angle between the orientation of the spacer implantation hole and the orientation of the shell implantation hole is 70° to 110°.

[0017] According to some embodiments of the present application, the battery further includes an internal structural component, which is disposed in the accommodating cavity, and a portion of the optical fiber is fixed to the internal structural component.

[0018] According to some embodiments of the present application, the accommodating cavity includes a first cavity wall and a second cavity wall arranged opposite to each other, the shell implantation hole is opened on the first cavity wall, the internal structural component includes a side plate, the side plate is fixed to one side of the pole core body, one end of the side plate extends toward the first cavity wall, and the other end of the side plate extends toward the second cavity wall, and a portion of the optical fiber is fixed on the side plate.

[0019] According to some embodiments of the present application, the spacer implantation hole and the side plate are located on the same side of the pole core body, the side plate has an inner side surface for fitting with the pole core body and an outer side surface for fixing the optical fiber, and the spacer implantation hole is oriented perpendicular to the outer side surface of the side plate.

[0020] According to some embodiments of the present application, the battery further includes a support sleeve, which is arranged at the shell implantation hole, the support sleeve has a support hole, the optical fiber passes through the support hole, and the optical fiber and the support hole are sealed at the fitting point, and the support sleeve and the shell implantation hole are sealed at the fitting point.

[0021] According to some embodiments of the present application, the support sleeve includes a sleeve body and a sleeve flange, the sleeve body is inserted into the implantation hole of the shell, the sleeve flange is connected to the sleeve body and is located in the accommodating cavity, and the sleeve flange is abutted against the inner wall of the shell.

[0022] According to some embodiments of the present application, the battery further includes a protective sleeve, which is located outside the accommodating cavity and is sleeved outside the optical fiber, and the protective sleeve is inserted into the supporting hole.

[0023] According to some embodiments of the present application, the shell includes: a shell body and an end cover, the shell body is formed with the accommodating cavity open to the outside, the end cover is suitable for closing the open mouth of the accommodating cavity, and the shell implantation hole is opened on the end cover.

[0024] According to some embodiments of the present application, the optical sensor is constructed as a combination of at least one or more of a temperature sensor, a stress sensor, a strain sensor, a potential sensor, and an air pressure sensor.

[0025] A battery module according to another embodiment of the present application includes the above-mentioned battery.

[0026] According to the battery module of the embodiment of the present application, the battery limits the optical fiber by passing the optical fiber through the shell implantation hole and the spacer implantation hole. At the same time, the optical fiber will not occupy too much space in the accommodating cavity, and the impact on the battery volume energy density is relatively small.

[0027] According to another embodiment of the present application, a power device includes the above-mentioned battery module.

[0028] According to the power equipment of the embodiment of the present application, its battery achieves the limitation of the optical fiber by passing the optical fiber through the shell implantation hole and the spacer implantation hole. At the same time, the optical fiber will not occupy too much space in the accommodating cavity, and the impact on the battery volume energy density is relatively small.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a partial cross-sectional view of a battery according to one embodiment of the present application;

[0031] FIG2 is a partial enlarged schematic diagram of point A in FIG1 ;

[0032] FIG3 is an exploded schematic diagram of the battery in FIG1 ;

[0033] FIG4 is a schematic diagram of the installation of the optical fiber on the housing;

[0034] FIG5 is a schematic diagram of a first spacer;

[0035] FIG6 is a schematic cross-sectional view of BB in FIG5 ;

[0036] FIG7 is a perspective schematic diagram of the interior of the battery in FIG1 ;

[0037] FIG8 is a perspective schematic diagram of a battery according to another embodiment of the present application;

[0038] FIG9 is a partial enlarged schematic diagram of point C in FIG8 ;

[0039] FIG10 is a perspective schematic diagram of the first spacer;

[0040] FIG11 is a partial enlarged schematic diagram of point D in FIG10;

[0041] FIG12 is a partial cross-sectional view of the battery in FIG8;

[0042] FIG13 is a perspective schematic diagram of the interior of the battery in FIG8 ;

[0043] FIG14 is a partial enlarged schematic diagram of point E in FIG13;

[0044] FIG15 is a schematic diagram of a battery module according to an embodiment of the present application;

[0045] FIG16 is a schematic diagram of a power device according to an embodiment of the present application.

[0046] Figures: Power equipment 10000; Battery module 1000; Battery 100; Battery shell 1, Shell 10, Shell body 11, End cover 12, Shell implantation hole 121; Pole core 20, Pole core body 21, First pole ear 22; Optical fiber 30, First segment 31, Second segment 32, Optical sensor 33; First spacer 40, Spacer implantation hole 41; Side plate 50; Support sleeve 60, Sleeve body 61, Sleeve flange 62, Support hole 63; Protective sleeve 70; Modem unit 80. DETAILED DESCRIPTION

[0047] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0048] The battery housing 1 , the battery 100 having the battery housing 1 , the battery module 1000 having the battery 100 , and the power device 10000 having the battery module 1000 according to an embodiment of the present application are described in detail below with reference to FIG. 1 to FIG. 16 .

[0049] 1 , 7 - 9 , and 12 - 14 , a battery housing 1 according to an embodiment of the present application includes: a housing 10 and a first spacer 40 .

[0050] A housing cavity is formed in the shell 10 , and a shell implantation hole 121 is provided on the shell 10 . The shell implantation hole 121 is used for the optical fiber 30 to pass through. For example, the optical fiber 30 can enter the housing cavity from the outside through the shell implantation hole 121 .

[0051] The first spacer 40 is disposed in the accommodating cavity. A spacer implantation hole 41 is provided on the first spacer 40 . The spacer implantation hole 41 is used for allowing the optical fiber 30 to pass through.

[0052] In related art, when adding a fiber optic tube inside a battery to accommodate optical fibers and optical sensors, the fiber optic tube can significantly damage the battery's structure, occupy a large amount of space, reduce the battery's volumetric energy density, and, to a certain extent, affect the battery's charge and discharge performance. According to the battery housing 1 of the present embodiment, by passing the optical fiber 30 through the housing implantation hole 121 and the spacer implantation hole 41, the optical fiber 30 is positioned, eliminating the need for adding a fiber optic tube inside the battery. At the same time, the optical fiber 30 does not occupy too much space in the storage cavity, and the impact on the volumetric energy density of the battery 100 is minimal.

[0053] 1 , 7 - 9 , and 12 - 14 , a battery 100 according to an embodiment of the present application may include: a housing 10 , a pole core 20 , a first spacer 40 , and an optical fiber 30 .

[0054] The pole core 20 is arranged in the accommodating cavity. The pole core 20 includes a pole core body 21 and a first pole ear 22. The first pole ear 22 is located at one end of the pole core body 21 facing the shell implantation hole 121. The first spacer 40 is fixed in the accommodating cavity. The first spacer 40 is used to fix the first pole ear 22.

[0055] The optical fiber 30 passes through the shell implantation hole 121 and the spacer ring implantation hole 41, so that the optical fiber 30 can be limited. The part of the optical fiber 30 located in the accommodating cavity is provided with an optical sensor 33, which is located in the accommodating cavity and is used to detect the pole core body 21. Optionally, the optical sensor 33 contacts the surface of the pole core body 21, so that the optical sensor 33 can collect parameter information of the pole core body 21. The part of the optical fiber 30 located outside the accommodating cavity is used to connect to the modulation and demodulation unit 80. Specifically, one end of the optical fiber 30 located outside the accommodating cavity is formed as a modulation and demodulation connection end, which is used to connect to the modulation and demodulation unit 80. The optical fiber 30 is used to transmit detection light to the optical sensor 33. After the optical sensor 33 collects the parameter information of the pole core body 21, the optical fiber 30 transmits back the signal light containing the parameter information to be measured to the modulation and demodulation unit 80.

[0056] Specifically, the optical sensor 33 on the optical fiber 30 is suitable for detecting parameters of the pole core 20, including but not limited to temperature, strain, stress, gas, air pressure, positive and negative electrode potential, and other parameters. The battery 100 equipped with the optical fiber 30 can provide the status parameters of a single pole core 20, helping the battery management system (BMS) to perform more accurate, timely, and comprehensive battery 100 status monitoring and provide early warning for parameters characterized by abnormal conditions of the battery 100. More specifically, the housing 10 can be a hard housing or a soft housing, etc., which is not limited here.

[0057] Optionally, one or more optical sensors 33 can be positioned on a single optical fiber 30. By adjusting the length and curvature of the optical fiber 30, the optical sensor 33 can be positioned at any or specific locations within the battery 100. Multiple optical sensors 33 placed within a cavity can be integrated onto a single optical fiber 30, simplifying the battery 100 structure and reducing manufacturing costs. Adjusting the number of optical sensors 33 and the placement of the optical fiber 30 allows for the collection of temperature, strain, and other signals at various locations within the battery 100, providing high flexibility.

[0058] In some embodiments, the optical fiber 30 may be coated with materials such as polyimide (PI) and polytetrafluoroethylene (PTFE) to protect the optical fiber 30 from corrosion by the electrolyte.

[0059] In some embodiments, the bending radius of the optical fiber 30 needs to meet certain requirements, for example, the bending radius of the optical fiber 30 is greater than 5 mm, to prevent the optical fiber 30 from being easily broken due to a too small bending radius.

[0060] The pole core body 21 includes a first pole piece, a second pole piece and a diaphragm arranged between the first pole piece and the second pole piece. Specifically, the pole core body 21 is formed by winding or stacking the first pole piece, the diaphragm and the second pole piece. The first pole piece is one of the positive pole piece and the negative pole piece, and the second pole piece is the other of the positive pole piece and the negative pole piece.

[0061] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0062] According to the battery 100 of the embodiment of the present application, the optical fiber 30 is limited by passing the optical fiber 30 through the shell implantation hole 121 and the spacer implantation hole 41, without adding an optical fiber through tube inside the battery. At the same time, the optical fiber 30 will not occupy too much space in the accommodating cavity, and the impact on the volume energy density of the battery 100 is relatively small.

[0063] The battery 100 according to an embodiment of the present application may include an internal structural component, which is disposed within the accommodating cavity. Optionally, the internal structural component may be connected to the housing 10 to achieve installation and fixation of the internal structural component within the accommodating cavity. Alternatively, the internal structural component may be connected to other structures within the accommodating cavity to achieve installation and fixation of the internal structural component within the accommodating cavity.

[0064] The optical fiber 30 is fixed to the inner wall and / or internal structural components of the housing 10. Specifically, the optical fiber 30 may be fixed only to the inner wall of the housing 10, or only to the internal structural components, or a portion of the optical fiber 30 may be fixed to the inner wall of the housing 10 and a portion of the optical fiber 30 may be fixed to the internal structural components.

[0065] The internal structural parts are structural parts other than the pole core 20 and the shell 10. For example, optionally, the internal structural parts can be brackets or side plates 50. The side plates 50 are fixed to one side of the pole core body 21. Of course, the internal structural parts can also be other structural parts.

[0066] In the related art, the optical sensor is fixed to the negative electrode surface inside the pole core with an adhesive. The adhesive will cause certain damage to the active material on the negative electrode sheet, affecting the electrical performance of the battery. According to the battery 100 of the embodiment of the present application, by fixing the optical fiber 30 to the inner wall and / or internal structural parts of the shell 10, the implantation of the optical fiber 30 and the optical sensor 33 and the collection and transmission of the corresponding parameter signals can be completed without damaging the internal structure of the battery 100 and the pole core body 21, thereby realizing the lossless implantation of the optical fiber 30 and the optical sensor 33 inside the battery 100, reducing the impact of the optical fiber 30 on the pole core 20 during installation, and at the same time, the optical fiber 30 will not occupy too much space in the accommodating cavity, and has little impact on the volume energy density of the battery 100.

[0067] In some embodiments of the present application, the optical fiber 30 is fixed to the inner wall of the housing 10. As shown in Figures 1 and 2, the optical fiber 30 may include a first segment 31 and a second segment 32. The first segment 31 is located on the side of the first spacer 40 facing the pole core body 21. The optical sensor 33 is located on the first segment 31, and the first segment 31 is at least partially fixed to the inner wall of the housing 10. The second segment 32 is connected to the first segment 31 and is used to connect to the modem unit 80. In other words, the modem connection end is located on the second segment 32. The second segment 32 is inserted through the housing implant hole 121 and the spacer implant hole 41. As shown in Figure 1, the first segment 31 is located below the first spacer 40, the optical sensor 33 is located at the lower end of the first segment 31, and the second segment 32 is inserted through the housing implant hole 121 and the spacer implant hole 41. The modem connection end is located at the upper end of the second segment 32. In the battery 100 of the present embodiment, since the optical fiber 30 and optical sensor 33 are arranged on the inner wall of the housing 10, they can be non-destructively implanted within the battery 100, minimizing their impact on the core 20 and the structure of the battery 100. Since the optical fiber 30 and optical sensor 33 do not directly contact the active materials of the battery 100, their impact on the charge and discharge performance of the battery 100 is essentially negligible. Furthermore, the placement of the optical fiber 30 on the inner wall of the housing 10 protects the optical fiber 30, significantly reducing the risk of signal distortion caused by damage to the optical fiber 30 during the manufacturing and use of the battery 100.

[0068] During the manufacturing process of the battery 100, the optical fiber 30 can be first glued to the surface of the unformed shell body 11. The unformed shell body 11 material undergoes processes such as roller bending, high-frequency welding, shaping, and cutting, and finally the optical fiber 30 and the optical sensor 33 are arranged on the inner wall surface of the shell body 11, as shown in Figure 4.

[0069] In some embodiments of the present application, the spacer implantation hole 41 and the housing implantation hole 121 are oriented in the same direction. For example, the spacer implantation hole 41 and the housing implantation hole 121 are both open upward, which makes it easier for operators to pass the optical fiber 30 from above the battery 100.

[0070] In some embodiments of the present application, the orientation of the spacer implantation hole 41 is different from the orientation of the shell implantation hole 121. For example, the angle between the orientation of the spacer implantation hole 41 and the orientation of the shell implantation hole 121 is 70° to 110°. Optionally, the angle between the orientation of the spacer implantation hole 41 and the orientation of the shell implantation hole 121 can be 70°, 80°, 90°, 100°, 110°, etc. Of course, the angle between the orientation of the spacer implantation hole 41 and the orientation of the shell implantation hole 121 can also be other values ​​before 70° to 110°, which are not listed here one by one.

[0071] In some embodiments of the present application, the optical fiber 30 is fixed to the internal structural component. Referring to Figures 12 to 14, the housing 10 includes a first cavity wall and a second cavity wall arranged opposite to each other, the housing implantation hole 121 is opened in the first cavity wall, and the internal structural component includes a side plate 50. The side plate 50 is fixed to one side of the pole core body 21, one end of the side plate 50 extends toward the first cavity wall, and the other end of the side plate 50 extends toward the second cavity wall. A portion of the optical fiber 30 is fixed to the side plate 50. For example, the first cavity wall is the top wall, the second cavity wall is the bottom wall, the side plate 50 is arranged in the vertical direction, the first spacer is located between the upper end of the side plate 50 and the top wall of the accommodating cavity, and the optical fiber 30 is fixed to the side plate 50 after passing through the housing implantation hole 121 and the spacer implantation hole 41. In the battery 100 of the present embodiment, since the optical fiber 30 and optical sensor 33 are arranged on the side panel 50, they can be non-destructively implanted within the battery 100, minimizing their impact on the structure of the core 20 and the battery 100. Since the optical fiber 30 and optical sensor 33 do not directly contact the active materials of the battery 100, their impact on the charge and discharge performance of the battery 100 is essentially negligible. Furthermore, the placement of the optical fiber 30 on the side panel 50 protects the optical fiber 30, significantly reducing the risk of signal distortion caused by damage to the optical fiber 30 during the manufacturing and use of the battery 100.

[0072] In some embodiments of the present application, as shown in Figures 12-14, the spacer implantation hole 41 and the side plate 50 are located on the same side of the pole core body 21, and the side plate 50 has an inner side surface and an outer side surface of the side plate. The inner side surface of the side plate is used to fit with the pole core body 21, and the outer side surface of the side plate is used to fix the optical fiber 30. The direction of the spacer implantation hole 41 is perpendicular to the outer side surface of the side plate. In this way, after the optical fiber 30 passes through the shell implantation hole 121 from top to bottom, it can pass through the spacer implantation hole 41 in the horizontal direction and then be attached to the side plate 50 in the vertical direction, which facilitates the routing of the optical fiber 30.

[0073] In some embodiments of the present application, as shown in Figures 1-2, 7-9, and 12-14, the battery 100 may further include a support sleeve 60, which is disposed at the housing implantation hole 121. The support sleeve 60 has a support hole 63, through which the optical fiber 30 passes, and the mating portion between the optical fiber 30 and the support hole 63 is sealed. The support sleeve 60 supports the optical fiber 30, and the mating portion between the support sleeve 60 and the housing implantation hole 121 is sealed. Optionally, the mating portion between the optical fiber 30 and the support hole 63 may be sealed with epoxy glue, and the support sleeve 60 may be fixed by welding or gluing within the housing implantation hole 121.

[0074] In some embodiments of the present application, as shown in Figures 2 and 14, the support sleeve 60 may include a sleeve body 61 and a sleeve flange 62. The sleeve body 61 is inserted into the housing implant hole 121, and the sleeve flange 62 is connected to the sleeve body 61. The sleeve flange 62 is located in the accommodating cavity, and the sleeve flange 62 abuts against the inner wall of the housing 10. This allows the support sleeve 60 to be accurately positioned in the housing implant hole 121, thereby ensuring that the sleeve body 61 and the housing implant hole 121 have a long axial overlap length, which is beneficial for reducing the risk of the support sleeve 60 falling off from the housing implant hole 121 and improving the support reliability of the support sleeve 60 for the optical fiber 30. Optionally, the joint between the sleeve flange 62 and the inner wall of the housing 10 can be sealed and fixed by spot welding, which is a simple process. In other words, the effective diameter of the sleeve flange 62 is larger than the effective diameter of the housing implant hole 121. The "effective diameter of the sleeve flange 62" refers to the distance between the two farthest points of the sleeve flange 62 on the same cross-section of the sleeve flange 62. For example, when the cross-section of the sleeve flange 62 is circular, the effective diameter of the sleeve flange 62 is the diameter of the circle. Similarly, the "effective diameter of the shell implant hole 121" refers to the distance between the two farthest points of the shell implant hole 121 on the same cross-section. For example, when the shell implant hole 121 is a circular hole, the effective diameter of the shell implant hole 121 is the diameter of the circular hole.

[0075] In some embodiments of the present application, the battery 100 further includes a protective sleeve 70. The protective sleeve 70 is located outside the accommodating cavity and is sleeved over the optical fiber 30. The protective sleeve 70 can provide protection for the optical fiber 30. The protective sleeve 70 is inserted into the support hole 63. In this way, the position of the protective sleeve 70 is fixed and it will not fall. Alternatively, the protective sleeve 70 can be a rubber tube, a silicone tube, a plastic tube, a metal tube, etc.

[0076] In some embodiments of the present application, the housing 10 may include a housing body 11 and an end cap 12. The housing body 11 has an externally open accommodating cavity formed therein, and the end cap 12 is adapted to close the open opening of the accommodating cavity. The housing implantation hole 121 is provided on the end cap 12. Optionally, the housing body 11 is a barrel-shaped structure with one end open, and the end cap 12 closes the open opening of the housing body 11. Alternatively, the housing body 11 is a cylindrical structure with both ends open, and the end cap 12 is provided at both open ends of the housing body 11.

[0077] Optionally, the housing body 11 may be an aluminum shell or a steel shell.

[0078] In the embodiment of Figure 1, a portion of the optical fiber 30 is fixed to the inner wall of the shell body 11. When assembling the battery 100, after the optical fiber 30 and the optical sensor 33 are arranged, the optical fiber 30 and the shell body 11 are glued to fix the optical fiber 30, and then the end cover 12 and the shell body 11 are welded together.

[0079] In some embodiments of the present application, the optical sensor 33 is constructed as a combination of at least one or more of a temperature sensor, a stress sensor, a strain sensor, a potential sensor, and an air pressure sensor. It is understood that the types of optical sensors 33 include, but are not limited to, temperature sensors, strain sensors, stress sensors, gas sensors, air pressure sensors, and potential sensors. The range and accuracy of each sensor match the operating range of the battery 100. Multiple sensors of the same type can be used in the same battery 100 and arranged in different positions. For example, a temperature sensor can be arranged at the top, middle, and bottom of the core body 21. Different types of sensors can be used separately in a battery 100, or several can be integrated or used together. For example, a temperature sensor and a stress sensor can be arranged in the middle of the core body 21, and a gas sensor and an air pressure sensor can be arranged at the top of the core body 21. Adjustments can be made according to actual needs.

[0080] In some embodiments, the optical sensor 33 is a fiber Bragg grating (FBG) sensor. The FBG sensor changes the wavelength of its reflected light waves based on changes in ambient temperature and strain, and can be used to detect the temperature and strain parameters of the battery core body 21. Specifically, the FBG sensor comprises a temperature sensor and a strain sensor. Based on the fiber Bragg grating principle, the temperature sensor can detect temperature signals at specific locations within the battery 100, and the strain sensor can detect strain signals at specific locations within the battery 100. The battery 100 of the present embodiment utilizes FBG sensors to enable real-time monitoring of internal temperature, strain, and other signals within the battery 100, with high measurement accuracy. This allows for early warning of battery 100 failure based on real-time internal signals, thereby enhancing battery 100 safety. In some embodiments of the present application, the FBG sensor is less than 5 mm thick. The temperature sensor can detect temperatures from -40°C to +150°C with an accuracy of ±1°C, and the strain sensor can detect pressures from 0 to 70 kN with an accuracy of 5% FS.

[0081] In some embodiments of the present application, the electrode core 20 may further include a second electrode tab, which is located at the end of the electrode core body 21 facing away from the first electrode tab 22, that is, the second electrode tab is located at the end of the electrode core body 21 away from the housing implantation hole 121. The battery 100 may further include a second spacer, which is fixed to the second electrode tab. The first electrode tab 22 is one of the positive electrode tab and the negative electrode tab, and the second electrode tab is the other of the positive electrode tab and the negative electrode tab.

[0082] Optionally, the first tab 22 is a positive tab, and the second tab is a negative tab. An explosion-proof valve is provided at the negative tab, and the housing implantation hole 121 and the spacer implantation hole 41 are located near the positive tab, so that the optical fiber 30 can be kept away from the explosion-proof valve. When thermal runaway of the battery 100 occurs, the high-temperature ejection from the explosion-proof valve will cause less damage to the optical fiber 30.

[0083] The assembly sequence of the battery 100 according to the embodiment of the present application may be:

[0084] 1) The core body 21 is provided;

[0085] 2) Apply glue to the base of the tabs at both ends of the core body 21, adhere the first tab 22 to one end of the core body 21, and adhere the second tab to the other end of the core body 21;

[0086] 3) Attach the pole core body 21 to the side plate 50;

[0087] 4) Fasten the first spacer 40 at the first tab 22;

[0088] 5) cutting the first electrode tab 22 and the second electrode tab;

[0089] 6) Buckle the second spacer at the second tab;

[0090] 7) Coating the pole core 20 and hot-melting the insulating film. It should be noted that the insulating film at the end where the first pole tab 22 is located is hot-melted to below the spacer implantation hole 41 of the first spacer 40;

[0091] 8) Insert the aforementioned coated core 20 into the housing body 11 integrated with the optical fiber 30 and the optical sensor 33, insert the optical fiber 30 through the housing implantation hole 121 and the spacer implantation hole 41, and support the sleeve flange 62 of the sleeve 60 for axial positioning on the end cap 12;

[0092] 9) Weld the end cover 12 and the shell body 11 together.

[0093] A battery 100 according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 7 .

[0094] The battery 100 includes a housing body 11 , an end cover 12 , a first spacer 40 , a second spacer, a side plate 50 , a pole core 20 , an optical sensor 33 and an optical fiber 30 . The shell body 11 is provided with one or two openings; the end cover 12 seals the opening, and the end cover 12 is provided with a shell implantation hole 121 for the optical fiber 30 to pass through; the first spacer 40 is fixed to the first pole ear by snapping and hot melting, and the second spacer is fixed to the second pole ear by snapping and hot melting, and the side of the first spacer 40 is provided with a spacer implantation hole 41 for the optical fiber 30 to pass through; the pole core 20 includes a pole core body 21, a first pole ear and a second pole ear, and the pole core body 21 includes a positive pole sheet, a negative pole sheet and a diaphragm, and the pole core 20 is encapsulated in the shell body 11; the optical sensor 33 is integrated on the side of the optical fiber 30 located in the accommodating cavity, and is fixed to the inner wall of the shell body 11 with the optical fiber 30, and is in front contact with the pole core body 21; the optical fiber 30 is arranged on the inner wall of the shell body 11, and is connected to the external modulation and demodulation unit 80 after passing through the spacer implantation hole 41 of the first spacer 40 and the shell implantation hole 121 of the end cover 12.

[0095] The present application provides a shell body 11 of an embodiment, which can be a steel shell or an aluminum shell. The optical fiber 30 and the optical sensor 33 are fixed to the inner wall. The optical fiber 30 is glued to the unformed shell surface. The unformed shell material undergoes processes such as roller bending, high-frequency welding, shaping, and incision, and finally the optical fiber 30 and the optical sensor 33 are arranged on the inner wall surface of the shell, as shown in Figure 4.

[0096] The present application provides an embodiment of a first spacer ring 40, wherein the first spacer ring 40 has a hole at the position shown in Figures 1 and 5-6, and the hole is a spacer ring implantation hole 41. One end of the optical fiber 30 passes through the spacer ring implantation hole 41, and the optical fiber 30 passes through the enclosed space between the first spacer ring 40 and the end cover 12.

[0097] The present application provides an embodiment of an end cap 12, in which the end cap 12 has a hole at the position shown in FIG1 , and the hole is a shell implantation hole 121, through which the optical fiber 30 passes through the shell implantation hole 121 and is connected to an external modulation and demodulation unit 80; the support sleeve 60 is fixed to the inner side of the shell implantation hole 121 due to a limiting effect, thereby fixing the optical fiber 30.

[0098] In a specific implementation, one end of the optical fiber 30, with the support sleeve 60, passes through the spacer implant hole 41. After the end cap 12 is welded to the housing body 11, it passes through the housing implant hole 121 and connects to the external modem unit 80, as shown in Figure 1. The area within the housing 10 where the optical fiber 30 passes through is free of any other battery components, and the optical fiber 30 is suspended in a slightly curved state, as shown in Figure 7.

[0099] The following describes a battery 100 according to another embodiment of the present application with reference to FIG. 8 to FIG. 14 .

[0100] As shown in FIG8-9 , the battery 100 includes a shell body 11 , an end cover 12 , a first spacer 40 , a second spacer, a side plate 50 , a pole core 20 , an optical sensor 33 and an optical fiber 30 . The shell body 11 is provided with one or two openings; the end cover 12 seals the opening, and the end cover 12 is provided with a shell implantation hole 121 for the optical fiber 30 to pass through; the first spacer 40 is fixed to the first pole ear by snapping and hot melting, and the second spacer is fixed to the second pole ear by snapping and hot melting, and the side of the first spacer 40 is provided with a spacer implantation hole 41 for the optical fiber 30 to pass through; the pole core 20 includes a pole core body 21, a first pole ear and a second pole ear, and the pole core body 21 includes a positive pole sheet, a negative pole sheet and a diaphragm, and the pole core 20 is encapsulated in the shell body 11; the optical sensor 33 is integrated on the side of the optical fiber 30 located in the accommodating cavity, and is fixed to the side plate 50 with the optical fiber 30, and contacts the side of the pole core body 21; the optical fiber 30 is arranged on the side plate 50, and is connected to the external modulation and demodulation unit 80 after passing through the spacer implantation hole 41 of the first spacer 40 and the shell implantation hole 121 of the end cover 12.

[0101] The present application provides another embodiment of the first spacer ring 40, in which the first spacer ring 40 has a hole at the position shown in Figures 10-11. The hole is a spacer ring implantation hole 41. One end of the optical fiber 30 fixed to the side plate 50 passes through the spacer ring implantation hole 41 and reaches the enclosed space between the first spacer ring 40 and the end cover 12.

[0102] In a specific implementation, one end of the optical fiber 30, with the support sleeve 60, passes through the spacer implant hole 41. After the end cap 12 is welded to the housing body 11, it passes through the housing implant hole 121 to connect to the external modem unit 80, as shown in Figure 12. The area within the end cap 12 where the optical fiber 30 passes through is free of any other battery components, and the optical fiber 30 is suspended in a slightly curved state, as shown in Figures 13 and 14.

[0103] According to the battery 100 of the embodiment of the present application, its optical fiber 30 and optical sensor 33 are integrated on the inner wall or side panel 50 of the shell body 11. The optical fiber 30 is implanted into the battery 100 through the shell implantation hole 121 and the spacer implantation hole 41. The optical sensor 33 includes a temperature sensor and a strain sensor, which can simultaneously collect the temperature and strain data signals inside the battery 100. Multiple optical sensors 33 can be arranged on one implanted optical fiber 30. After the signal obtained by the optical sensor 33 is output to the modulation and demodulation unit 80 through the optical fiber 30, the intelligent monitoring of the battery 100 can be completed.

[0104] 15 , a battery module 1000 according to another embodiment of the present application includes the battery 100 according to the above embodiment.

[0105] According to the battery module 1000 of the embodiment of the present application, the battery 100 achieves the limitation of the optical fiber 30 by passing the optical fiber 30 through the shell implantation hole 121 and the spacer implantation hole 41, without adding an optical fiber tube inside the battery. At the same time, the optical fiber 30 will not occupy too much space in the accommodating cavity, and the impact on the volume energy density of the battery 100 is relatively small.

[0106] 16 , a power device 10000 according to another embodiment of the present application includes the battery module 1000 of the above embodiment.

[0107] According to the power equipment 10000 of the embodiment of the present application, its battery 100 achieves the limitation of the optical fiber 30 by passing the optical fiber 30 through the shell implantation hole 121 and the spacer implantation hole 41, without adding an optical fiber tube inside the battery. At the same time, the optical fiber 30 will not occupy too much space in the accommodating cavity, and the impact on the volume energy density of the battery 100 is relatively small.

[0108] Optionally, the power equipment 10000 may be a vehicle, a machine tool, a household appliance, etc.

[0109] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0110] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0111] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0112] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery housing (1), wherein: include: A housing (10), wherein a receiving cavity is formed in the housing (10), and a housing implantation hole (121) is provided on the housing (10); A first spacer (40), wherein the first spacer (40) is arranged in the accommodating cavity, and a spacer implantation hole (41) is provided on the first spacer (40); the housing implantation hole (121) and the spacer implantation hole (41) are used for allowing the optical fiber (30) to pass through.

2. A battery (100), wherein: include: The battery housing (1) as claimed in claim 1; A pole core (20), the pole core (20) being arranged in the accommodating cavity, the pole core (20) comprising a pole core body (21) and a first pole ear (22) located at one end of the pole core body (21) facing the housing implantation hole (121), the first spacer (40) being used for fixing the first pole ear (22); and An optical fiber (30), wherein the optical fiber (30) passes through the housing implantation hole (121) and the spacer implantation hole (41); the portion of the optical fiber (30) located in the accommodating cavity is provided with an optical sensor (33); the optical sensor (33) is located in the accommodating cavity, and the optical sensor (33) is used to detect the pole core body (21); and the portion of the optical fiber (30) located outside the accommodating cavity is used to connect to a modulation and demodulation unit (80).

3. The battery (100) according to claim 2, wherein: The optical fiber (30) is fixed to the inner wall of the housing (10).

4. The battery (100) according to claim 3, wherein: The optical fiber (30) comprises: a first segment (31), the first segment (31) being located on a side of the first spacer (40) facing the pole core body (21), the optical sensor (33) being located on the first segment (31), and the first segment (31) being at least partially fixed to an inner wall of the housing (10); and A second segment (32), the second segment (32) is connected to the first segment (31), and the second segment (32) is used to connect to a modulation and demodulation unit (80).

5. The battery (100) according to claim 3 or 4, wherein: The spacer implantation hole (41) and the shell implantation hole (121) have the same orientation; or, the angle between the orientation of the spacer implantation hole (41) and the orientation of the shell implantation hole (121) is 70° to 110°.

6. The battery (100) according to any one of claims 2 to 5, wherein: The battery (100) further comprises an internal structural component, wherein the internal structural component is arranged in the accommodating cavity, and a portion of the optical fiber (30) is fixed to the internal structural component.

7. The battery (100) according to claim 6, wherein: The shell (10) comprises a first cavity wall and a second cavity wall which are arranged opposite to each other, the shell implantation hole (121) is opened on the first cavity wall, the internal structural member comprises a side plate (50), the side plate (50) is fixed to one side of the pole core body (21), one end of the side plate (50) extends toward the first cavity wall, and the other end of the side plate (50) extends toward the second cavity wall, and a part of the optical fiber (30) is fixed on the side plate (50).

8. The battery (100) according to claim 7, wherein: The spacer implantation hole (41) and the side plate (50) are located on the same side of the pole core body (21); the side plate (50) has an inner side surface for fitting with the pole core body (21) and an outer side surface for fixing the optical fiber (30); the spacer implantation hole (41) is oriented perpendicular to the outer side surface of the side plate.

9. The battery (100) according to any one of claims 2 to 8, wherein: The battery (100) further comprises a support sleeve (60), wherein the support sleeve (60) is arranged at the housing implantation hole (121), the support sleeve (60) has a support hole (63), the optical fiber (30) passes through the support hole (63), and the mating portion between the optical fiber (30) and the support hole (63) is sealed, and the mating portion between the support sleeve (60) and the housing implantation hole (121) is sealed.

10. The battery (100) according to claim 9, wherein: The supporting sleeve (60) comprises a sleeve body (61) and a sleeve flange (62); the sleeve body (61) is inserted into the shell implantation hole (121); the sleeve flange (62) is connected to the sleeve body (61) and is located in the accommodating cavity; the sleeve flange (62) abuts against the inner wall of the shell (10).

11. The battery (100) according to claim 9 or 10, wherein: The battery (100) further comprises a protective sleeve (70), wherein the protective sleeve (70) is located outside the accommodating cavity and sleeved outside the optical fiber (30), and the protective sleeve (70) is inserted into the supporting hole (63).

12. The battery (100) according to any one of claims 2 to 11, wherein: The housing (10) comprises: A housing body (11), wherein the housing body (11) has the accommodation cavity opened toward the outside formed therein; and An end cover (12), wherein the end cover (12) is suitable for closing the open opening of the accommodating cavity, and the shell implantation hole (121) is provided on the end cover (12).

13. The battery (100) according to any one of claims 2 to 12, wherein: The optical sensor (33) is constructed as a combination of at least one or more of a temperature sensor, a stress sensor, a strain sensor, a potential sensor, and an air pressure sensor.

14. A battery module (1000), wherein: A battery (100) comprising any one of claims 2 to 13.

15. A power device (10000), wherein: Comprising the battery module (1000) as claimed in claim 14.

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