Cylindrical battery and battery pack

Abstract

The invention discloses a cylindrical battery and a battery pack. The cylindrical battery comprises a shell, a battery cell, an adapter, a top cover assembly and a BMS module, the battery cell is accommodated in the shell and is provided with a tab; the adapter is connected with the shell; the top cover assembly is connected with the top end of the adapter, the top cover assembly comprises a cover plate and a pole assembly, the cover plate is connected with the top end of the adapter, and the pole assembly penetrates through the cover plate and is electrically connected with the tabs; and the BMS module is arranged on one side, facing the tab, of the cover plate and is used for collecting and transmitting the data of the battery cell, so that the problems of complicated wiring in the battery and possible large interference on the internal space layout of the battery are avoided. According to the invention, the space at the top of the cylindrical battery is fully utilized, additional arrangement of an independent BMS mounting area is avoided, the whole battery structure is more compact, the total volume of a battery system is reduced, the space utilization rate is improved, and higher energy density can be realized in a limited space.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a cylindrical battery and a battery pack. Background Art

[0002] Cylindrical batteries have advantages in energy density, output power, cycle life and other performance, and can better meet the needs of consumer electronic devices, power tools and other products for energy storage and rapid release.

[0003] To more closely manage cylindrical batteries, technicians are considering integrating a BMS (Battery Management System) into them. However, the limited internal space of traditional cylindrical battery structures, along with the addition of a BMS, makes it difficult to accommodate numerous components. This can easily lead to component squeezing and cluttered wiring, seriously impacting the battery's proper operation. Summary of the Invention

[0004] The main purpose of the present invention is to propose a cylindrical battery and a battery pack, aiming to solve the technical problems of existing cylindrical batteries caused by the introduction of components such as BMS modules, which lead to tight internal space and inefficient space utilization, resulting in device squeezing and messy circuits.

[0005] To achieve the above objectives, the present invention provides a cylindrical battery comprising:

[0006] case;

[0007] A battery cell is housed in the housing, and an end of the battery cell has a tab;

[0008] A transfer seat having a first end and a second end extending along a first direction, wherein the first end is connected to the housing, and the height of the transfer seat is higher than the tab;

[0009] a top cover assembly connected to the second end, the top cover assembly comprising a cover plate and a pole assembly, the cover plate being connected to the second end, the pole assembly being passed through the cover plate and electrically connected to the tab;

[0010] A BMS module is provided on a side of the cover plate facing the tab, and is used to collect data of the battery cell and transmit the data of the battery cell.

[0011] In some embodiments, the pole assembly includes a pole and a tab connector, the pole is arranged on a side of the cover plate away from the tab, the tab connector is arranged between the pole and the tab, and the tab connector electrically connects the pole and the tab.

[0012] In some embodiments, one end of the tab connector located in the first direction abuts against the tab, and the other end of the tab connector located in the first direction is connected to a surface of the cover plate facing the tab and is electrically connected to the BMS module;

[0013] The cover plate is a conductive cover plate, and the BMS module, pole column, and tab connector are electrically connected to the conductive cover plate respectively.

[0014] In some embodiments, the BMS module includes an information collection unit and a wireless communication unit, the information collection unit and the wireless communication unit are arranged on a side of the conductive cover facing the tab, the information collection unit is used to collect data of the battery cell, and the wireless communication unit is used to wirelessly transmit the data of the battery cell;

[0015] Wherein, the information collection unit and the wireless communication unit are located on a side of the conductive cover plate facing the tab.

[0016] In some embodiments, the tab connector includes a pre-stressed part, an elastic part and an adapter, one end of the adapter abuts against the tab, and the other end is connected to the side of the cover plate facing the tab and is electrically connected to the BMS module; the pre-stressed part and the elastic part are located in the adapter, one end of the pre-stressed part located in the first direction abuts against the inner wall of the adapter, the other end of the pre-stressed part located in the first direction is connected to one end of the elastic part, and the other end of the elastic part close to the cover plate abuts against the cover plate.

[0017] In some embodiments, the adapter includes a card seat and a bracket, the card seat includes a support plate and a plug-in component, the support plate and the plug-in component are connected in the first direction, the first end is configured at an end of the plug-in component facing away from the support plate, the first end is inserted between the housing and the battery cell, and the support plate is provided with a first through hole;

[0018] The bracket includes a bottom wall connected to the support plate, and a side wall connected to the bottom wall. The second end is constructed at an end of the side wall facing away from the bottom wall. The bottom wall is provided with a second through hole connected to the first through hole. The pole assembly is passed through the first through hole and the second through hole to be electrically connected to the pole ear.

[0019] In some embodiments, the side wall is provided with a third through hole for passing a communication device.

[0020] In some embodiments, the card seat is made of a metal material, and the adapter seat further includes an insulating layer, and the insulating layer is provided between the bottom wall and the support plate.

[0021] In some embodiments, the cylindrical battery further includes a protective cover, which is disposed on the periphery of the adapter. The protective cover is provided with a fourth through hole for passing a communication device.

[0022] The present application also provides a battery pack, comprising a box and at least one cylindrical battery as described above, wherein the cylindrical battery is installed in the box.

[0023] The cylindrical battery provided by the present application fully utilizes the space on the top of the cylindrical battery by connecting the adapter to the shell, and the BMS module is directly set on the side of the cover plate facing the pole ear. Compared with the traditional layout of separate batteries and external BMS, it avoids the additional setting of an independent BMS installation area, making the entire battery structure more compact, reducing the total volume of the battery system, improving space utilization, and facilitating the realization of higher energy density in a limited space. When the cover plate, the adapter and the shell are connected, the pole assembly can be electrically connected to the pole ear, ensuring a smooth power supply path from the battery cell to the BMS module, while realizing the transmission of battery cell data, avoiding the problem of complex wiring inside the cylindrical battery and possible interference with the internal space layout of the cylindrical battery, making the position layout of the BMS module inside the cylindrical battery more flexible, without considering the cumbersome wiring direction, and facilitating the optimization of the internal space utilization of the cylindrical battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a disassembled schematic diagram of an embodiment of a cylindrical battery of the present invention;

[0025] Figure 2 Schematic cross-sectional view of an embodiment of a cylindrical battery of the present invention;

[0026] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0027] Figure 4 This is a schematic structural diagram of an embodiment of a top cover assembly of the present invention;

[0028] Figure 5 is a cross-sectional schematic diagram of an embodiment of a top cover assembly of the present invention;

[0029] Figure 6 Schematic diagram of the installation of the top cover assembly and the adapter according to one embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031]

[0032]

[0033] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings to clearly and completely describe the solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0037] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] Please refer to Figures 1 to 5 In one embodiment of the present application, a cylindrical battery 100 is provided, comprising a shell 10, a battery cell 20, an adapter 30 and a BMS module 50. The battery cell 20 is accommodated in the shell 10, and the end of the battery cell 20 has a tab 21; the adapter 30 has a first end 301 and a second end 302 extending along a first direction Z, and the first end 302 is connected to the shell 10; the top cover assembly 40 is connected to the second end 302, and the top cover assembly 40 includes a cover plate 41 and a pole assembly 42, the cover plate 41 is connected to the second end 302, and the pole assembly 42 is passed through the cover plate 41 and electrically connected to the tab 21; the BMS module 50 is provided on the side of the cover plate 41 facing the tab 21, and the BMS module 50 is used to collect data of the battery cell 20 and transmit the data of the battery cell 20.

[0039] It should be understood that, in some embodiments, the battery cell 20 is placed in the cylindrical shell 10 , and the tabs 21 at the ends thereof may be exposed outside the shell 10 , in preparation for subsequent electrical connection with an external circuit.

[0040] In some embodiments, the first end 302 of the adapter 30 is connected to the shell 10, and its height can be higher than the tab 21, playing a certain role in raising and transitioning, creating conditions for the subsequent installation of the top cover assembly 40 and the reasonable layout between the various components.

[0041] The cover plate 41 in the top cover assembly 40 is connected to the second end 302, forming a relatively closed and stable structure at the top of the cylindrical battery 100, and the pole assembly 42 is passed through the cover plate 41 and electrically connected to the pole ear 21, thereby establishing a conductive path between the battery cell 20 and the external circuit, ensuring that the cylindrical battery 100 can carry out electrochemical reactions such as charging and discharging normally.

[0042] The BMS module 50 is located on the side of the cover plate 41 facing the tab 21, close to the battery cell 20, allowing for direct collection of relevant parameters (such as voltage, current, and temperature) of the battery cell 20. The BMS module 50 utilizes communication technology to transmit the collected data, enabling data transmission so that external devices can monitor the status of the battery cell 20 in real time and perform corresponding control.

[0043] It should be understood that the BMS module 50 can use wired or wireless communication technology to send the collected battery cell data, and can be set according to actual needs, which is not limited in the embodiment of the present application.

[0044] Unlike traditional cylindrical batteries that add BMS modules, resulting in tight internal space and a messy layout, the cylindrical battery 100 provided in the present application connects the adapter 30 to the shell 10, and the BMS module 50 is directly set on the side of the cover 41 facing the tab 21, thereby fully utilizing the space on the top of the cylindrical battery 100 and avoiding the additional setting of an independent BMS module installation area, making the entire battery structure more compact, reducing the total volume of the battery system, improving space utilization, and facilitating achieving higher energy density in a limited space.

[0045] When the cover plate 41, the adapter 30 and the shell 10 are connected, the pole assembly 42 can be electrically connected to the pole ear 21, ensuring a smooth power supply path from the battery cell 20 to the BMS module 50, while realizing the transmission of data from the battery cell 20, avoiding the problem of complex wiring inside the cylindrical battery 100 and possible significant interference with the internal space layout of the cylindrical battery 100, making the position layout of the BMS module 50 inside the cylindrical battery 100 more flexible, without considering the cumbersome wiring direction, which is conducive to optimizing the internal space utilization of the cylindrical battery 100.

[0046] Please refer to Figures 3 to 5 In some embodiments, the pole assembly 42 includes a pole 421 and a tab connector 422. The pole 421 is provided on a side of the cover plate 41 away from the tab 21. The tab connector 422 is provided between the pole 421 and the tab 21. The tab connector 422 electrically connects the pole 421 and the tab 21.

[0047] Among them, the pole 421 is arranged on the side of the cover 41 away from the pole ear 21, and is located at a relatively easy-to-access position outside the cylindrical battery 100, which is convenient for subsequent connection with external electrical equipment or circuit systems to output or receive electrical energy.

[0048] The tab connector 422 is located between the post 421 and the tab 21, electrically connecting them. Since the tab 21 is the portion exposed from the end of the cell 20 and directly connected to the electrode material inside the cell 20, while the post 421 is the endpoint for external connection, the tab connector 422 electrically connects the post 421 and the tab 21, ensuring smooth and stable current flow between the cell 20 and the external circuit, thereby completing the entire battery's charge and discharge circuit.

[0049] By providing the tab connector 422, this embodiment can select the optimal connection process based on the different structural characteristics and material properties of the tab 21 and the post 421, thereby achieving a reliable electrical connection between the two. Compared to directly connecting the tab 21 to the post 421, which may result in poor contact and unstable connection, the tab connector 422 can ensure good conductivity while enhancing the connection strength, reducing the occurrence of loose connections and increased resistance caused by factors such as vibration and temperature changes, thereby ensuring stable current transmission during the charge and discharge process of the cylindrical battery 100 and maintaining stable battery performance.

[0050] In some embodiments, one end of the tab connector 422 located in the first direction Z abuts against the tab 21 , and the other end of the tab connector 422 located in the first direction Z is connected to a surface of the cover plate 41 facing the tab 21 and is electrically connected to the BMS module 50 ;

[0051] The cover plate 41 is a conductive cover plate, and the BMS module 50 , the pole 421 , and the tab connector 422 are electrically connected to the conductive cover plate respectively.

[0052] In this embodiment, one end of the tab connector 422 located in the first direction Z is electrically connected to the tab 21, ensuring effective electrical contact between the two. Since the tab 21 carries the current generated by the internal electrodes of the battery cell 20, through close abutment, the current can be smoothly transmitted from the tab 21 to the tab connector 422, laying the foundation for the subsequent transmission of electrical energy to the pole column 421 and the external circuit. In addition, the abutment form, while ensuring good electrical conductivity, is more convenient for installation and operation than some complex connection structures. During the production and assembly process of the cylindrical battery 100, this connection step can be completed more efficiently, thereby improving production efficiency.

[0053] The other end of the tab connector 422 located in the first direction Z is connected to the side of the cover plate 41 facing the tab 21, which not only fixes the tab connector 422 itself in place and maintains stability within the internal structure of the cylindrical battery 100, but also establishes an electrical connection between it and the BMS module 50. Because the BMS module 50 needs to collect data from the battery cell 20 in real time, and data such as the current status of the battery cell 20 can be transmitted through the conductive path of the tab 21 and the tab connector 422, the BMS module 50 can easily obtain relevant data and accurately monitor the status of the battery cell 20.

[0054] For example, when the current of the battery cell 20 changes during the charging and discharging process, the current will pass through the tab 21 and the tab connector 422 in sequence. The BMS module 50 can sense these current change information by connecting to the tab connector 422. At the same time, combined with other sensors equipped with it (such as voltage sensors, temperature sensors, etc.), it can fully grasp the working status of the battery cell 20 and send these data through wireless transmission, which is convenient for external monitoring and management of the cylindrical battery 100.

[0055] As a medium for signal transmission, the conductive cover plate can stably transmit the electrical signal at the tab 21 to the BMS module 50 , ensuring that the BMS module 50 accurately obtains the status information of the cylindrical battery 100 .

[0056] The conductive cover connects the tab connector 422, the pole 421, the BMS module 50 and other components together to form a unified conductive network. Compared with the use of multiple scattered connecting wires, the complexity of wiring is reduced, the structure of the cylindrical battery 100 is more compact, the internal space is saved, and it is conducive to the miniaturization and integrated design of the cylindrical battery 100. Moreover, the conductive cover is usually an integral component. During the assembly process of the cylindrical battery 100, it only needs to be simply connected to other components, which reduces the difficulty of assembly and improves production efficiency. During later maintenance and overhaul, it is also easier to inspect and replace the conductive cover and its connecting components, reducing maintenance costs and time.

[0057] In some embodiments, the BMS module 50 , the pole 421 , and the tab connector 422 may be electrically connected to the conductive cover plate by welding.

[0058] This embodiment improves the integration of the internal structure of the cylindrical battery 100 by combining the tabs 21, tab connectors 422, BMS module 50, and cover plate 41. Compared to a method in which each component is dispersed and individually connected, this compact connection reduces unnecessary wiring and space occupation, allowing the limited internal space of the cylindrical battery 100 to be more fully utilized, helping to achieve miniaturization and efficiency of the overall structure of the cylindrical battery 100, especially in application scenarios with high space requirements (such as batteries for small portable electronic devices).

[0059] Please continue to refer to Figure 4 and Figure 5 In some embodiments, the tab connector 422 includes a pre-compression member 4221, an elastic member 4222 and an adapter 4223, one end of the adapter 4223 abuts against the tab 21, and the other end is connected to a side of the cover plate 41 facing the tab 21 and is electrically connected to the BMS module 50; the pre-compression member 4221 and the elastic member 4222 are located in the adapter 4223, one end of the pre-compression member 4221 located in the first direction Z abuts against the inner wall of the adapter 4223, the other end of the pre-compression member 4221 located in the first direction Z is connected to one end of the elastic member 4222, and the other end of the elastic member 4222 close to the cover plate 41 abuts against the cover plate 41.

[0060] Among them, one end of the adapter 4223 directly contacts the tab 21, ensuring that the current conducted by the battery cell 20 can be smoothly received from the tab 21, so that the current can continue to be transmitted outward through the adapter 4223. The other end of the adapter 4223 is connected to the side of the cover plate 41 facing the tab 21, and is electrically connected to the BMS module 50, so that relevant data of the battery cell 20 (such as current conditions, etc.) can be accurately collected by the BMS module 50. At the same time, it also ensures the normal conduction of current during the entire charging and discharging process of the cylindrical battery 100, and maintains a good electrical connection between the cylindrical battery 100 and the external circuit.

[0061] Furthermore, the pre-pressed member 4221 and the elastic member 4222 are arranged inside the adapter 4223. One end of the pre-pressed member 4221 located in the first direction Z abuts against the inner wall of the adapter 4223, and the other end located in the first direction Z is connected to one end of the elastic member 4222, and its own positioning and support are achieved by means of the internal space of the adapter 4223. The other end of the elastic member 4222, which is close to the cover plate 41, abuts against the cover plate 41. In this way, during the assembly and subsequent use of the battery, the elastic member 4222, by virtue of its own elastic properties, can, to a certain extent, buffer and absorb external pressure, vibration and other forces, thereby maintaining a relatively stable connection between the various components. At the same time, the pre-pressed member 4221 can exert a certain pre-pressing effect on the elastic member 4222, so that the elastic member 4222 has a certain elastic potential energy in the initial state, further enhancing its ability to cope with changes in external forces and maintain a stable connection.

[0062] In addition, the pre-pressed part 4221 and the elastic part 4222 can adapt to different assembly tolerances to a certain extent. Specifically, since the elastic part 4222 can expand and contract within a certain range, even if there is a certain deviation in the size of the adapter 4223, the tab 21, the cover plate 41 and other components, the deformation of the elastic part 4222 can still compensate for it, ensuring that each component can be accurately installed in place and achieve a good connection. During the subsequent use of the cylindrical battery 100, as the temperature changes, the various components will expand and contract due to heat and cold. The elastic part 4222 can also adapt to this size change through its own elastic adjustment, maintain the stability of the entire tab connector 422 structure and the reliability of the electrical connection, and ensure that the cylindrical battery 100 can operate stably under various working conditions.

[0063] In some embodiments, the BMS module 50 includes an information collection unit and a wireless communication unit. The information collection unit and the wireless communication unit are arranged on the side of the conductive cover facing the tab 21. The information collection unit is used to collect data of the battery cell 20, and the wireless communication unit is used to wirelessly transmit the data of the battery cell 20.

[0064] In this embodiment, the conductive cover is the fundamental supporting structure of the entire BMS module 50, fulfilling the dual functions of structural support and protection of internal components. On the one hand, the conductive cover provides a stable mounting surface for key components such as the information acquisition unit and wireless communication unit, ensuring that these components can accurately perform their respective functions. On the other hand, the conductive cover participates in the overall sealing and protection system of the cylindrical battery 100, preventing external impurities such as dust and moisture from entering the battery interior and causing damage to the battery cells 20 and various electronic components. This helps maintain a good internal working environment of the battery and prolongs the battery life.

[0065] The information collection unit is provided on the conductive cover and is located on the side thereof facing the tab 21. It can be in close contact with the battery cell 20, facilitating the collection of various key data of the battery cell 20. The wireless communication unit is also located on the side of the conductive cover facing the tab 21. After acquiring the battery cell 20 data collected by the information collection unit, the wireless communication unit uses wireless communication technology (such as Bluetooth, Zigbee, radio frequency communication in a specific frequency band, etc.) to send this data wirelessly, so that monitoring equipment and management systems outside the cylindrical battery 100 can remotely receive the battery cell 20 data without the need for complex wired connections, thereby realizing convenient transmission of the cylindrical battery 100 data and facilitating real-time monitoring and effective management of the cylindrical battery 100 status in different application scenarios.

[0066] This embodiment significantly optimizes the internal spatial layout of the cylindrical battery 100 by placing the information collection unit and wireless communication unit on the conductive cover. Compared to traditional BMS modules that use independent circuit boards and additional cover structures, this reduces the number of components and the required installation space, avoiding space waste and enabling more efficient utilization of the limited space within the cylindrical battery 100, thereby achieving a more compact and miniaturized overall structure of the cylindrical battery 100.

[0067] Please refer to Figure 1 、 Figure 3 and Figure 6 In some embodiments, the adapter 30 includes a card seat 31 and a bracket 32. The card seat 31 includes a support plate 311 and a plug-in component 313. The support plate 311 and the plug-in component 313 are connected in a first direction Z. The first end 301 is configured at an end of the plug-in component 313 facing away from the support plate 311. The first end 301 is inserted between the housing 10 and the battery cell 20. The support plate 311 has a first through hole 312.

[0068] The bracket 32 ​​includes a bottom wall 321 connected to the support plate 311, and a side wall 322 connected to the bottom wall 321. The second end 302 is constructed at the end of the side wall 322 facing away from the bottom wall 321. The bottom wall 321 is provided with a second through hole 324 connected to the first through hole 312. The pole assembly 42 is passed through the first through hole 312 and the second through hole 324 to be electrically connected to the pole ear 21.

[0069] The first end 301 of the connector 313, facing away from the support plate 311, is inserted between the housing 10 and the battery cell 20, forming a tight connection with the battery cell 20 and the housing 10. This provides a certain positioning and support function, helping to stabilize the position of the battery cell 20 within the housing 10 and prevent unnecessary displacement of the battery cell 20 during use. A first through hole 312 is provided on the support plate 311, and a second through hole 324 is provided on the bottom wall 321, which communicates with the first through hole 312. The first and second through holes 312, 324, provide accurate installation and positioning space for the terminal assembly 42, allowing the terminal assembly 42 to be smoothly installed and electrically connected to the tab 21 of the battery cell 20, ensuring a smooth current conduction path during charging and discharging of the cylindrical battery 100.

[0070] The bottom wall 321 of the bracket 32 ​​is connected to the support plate 311 of the holder 31 to form a stable connection structure, which can jointly support subsequent components and withstand forces from external factors.

[0071] In some embodiments, the height of the side wall 322 can be higher than the tab 21, providing a certain protective space for the tab 21 and surrounding related components (such as the tab connector 422, etc.), preventing the tab 21 from being disturbed by external factors (such as collision, extrusion, etc.). At the same time, it also plans a reasonable area range for the layout of the interior of the cylindrical battery 100 to a certain extent, which is conducive to the orderly placement of various components and ensures the rationality and compactness of the internal structure of the cylindrical battery 100.

[0072] In some embodiments, the side wall 322 is provided with a third through hole 323 for passing a communication device.

[0073] The presence of the third through-hole 323 provides a dedicated transmission channel for the signal emitted by the BMS module 50, reducing the possibility of the signal being blocked, reflected, or absorbed by other components within the cylindrical battery 100. This allows the signal to be transmitted more smoothly from the inside of the cylindrical battery 100 to the outside, improving the efficiency and quality of signal transmission. For example, after the BMS module 50 collects data from the battery cell 20, the signal sent via the wireless communication unit or cable can be accurately transmitted outward through the third through-hole 323, allowing external monitoring equipment to receive the status data of the cylindrical battery 100 in a timely and clear manner, facilitating effective real-time monitoring and management of the cylindrical battery 100.

[0074] In some embodiments, the design of the third through hole 323 dividing the side wall 322 into two symmetrical halves is not only beautiful in appearance, but also this symmetrical structure enables the side wall 322 to share external force relatively evenly when subjected to force, thereby ensuring the stability of the entire adapter 30 structure and avoiding structural deformation, damage, etc. due to local uneven force. Even when the cylindrical battery 100 is subjected to external forces such as vibration and impact (for example, when an electric car is driving on a bumpy road or a portable electronic device is accidentally dropped), it can still maintain good structural integrity and provide reliable support and protection for the internal components.

[0075] It should be noted that, in other embodiments, the number of the third through holes 323 may be one, three or more, and may be asymmetrically arranged on the side wall 322 . The arrangement may be selected according to actual conditions, and the embodiment of the present application does not limit this.

[0076] In some embodiments, the card holder 31 is made of metal material, and the adapter 30 further includes an insulating layer 33 , which is disposed between the bottom wall 321 and the support plate 311 .

[0077] In the traditional cylindrical battery design, the shell carries electricity with opposite polarity to the pole, and the series and parallel connection of the batteries is achieved by adjusting the connection relationship between the pole and the shell. In this embodiment, the holder 31 is made of metal material. There are a large number of free electrons inside the metal, which has good conductivity. In the cylindrical battery 100 structure, the battery cell 20 will generate an electric charge. After the metal holder 31 is electrically connected to the battery cell 20, the charge carried by the battery cell 20 can be conducted to the holder 31 through the directional movement of free electrons in the metal holder 31. Since the metal holder 31 is connected to the shell 10, the charge will be further conducted from the holder 31 to the shell 10, making the shell 10 charged. In this way, the shell 10 becomes part of the electrical connection of the cylindrical battery 100, which is equivalent to a conductive electrode.

[0078] When multiple cylindrical batteries 100 need to be connected in series, the pole 421 of one cylindrical battery 100 can be connected to the charged shell 10 of another cylindrical battery 100. Since the metal card holder 31 has already conducted the electricity of the battery cell 20 to the shell 10, this connection method allows the current to pass through each cylindrical battery 100 in sequence, achieving the superposition of the voltage of the cylindrical battery 100. If a parallel connection is to be achieved, the poles 421 of each cylindrical battery 100 can be connected to each other, and the shells 10 of each cylindrical battery 100 can also be connected to each other. In this way, the voltage of each cylindrical battery 100 is equal, and the total capacity of the cylindrical battery 100 will increase.

[0079] In traditional battery connections, it is usually necessary to connect the poles precisely. In this design, you can choose to connect any position of the shell 10, and there is no need to forcibly connect the other side of the pole 421, which greatly increases the flexibility of the electrical connection, reduces the difficulty and precision requirements of the connection, and makes it easier for the cylindrical battery 100 to achieve the required circuit connection method in different application scenarios. During the operation of the cylindrical battery 100, current will pass through the battery cell 20, and the socket 31 of the adapter 30 is connected to the conductive components such as the battery cell 20, and the bracket 32 ​​cooperates with other components and is in the internal structure system of the battery. If there is no insulating layer 33, when a conductive path appears between the socket 31 and the bracket 32 ​​due to unexpected circumstances (such as moisture on the components, conductive impurities attached to the surface, etc.), it is easy to cause a short circuit failure, which may cause the battery to overheat, damage, or even safety hazards (such as fire, explosion and other serious consequences).

[0080] In this embodiment, an insulating layer 33 is provided between the support plate 311 of the card holder 31 and the side wall 322 of the bracket 32. Due to the good insulation performance of the insulating layer 33, the current can be effectively blocked from being conducted between the card holder 31 and the bracket 32, thereby avoiding the risk of short circuit, ensuring the electrical safety of the cylindrical battery 100, and ensuring that the normal charging and discharging functions of the cylindrical battery 100 can be carried out stably.

[0081] In addition to its insulation function, the insulating layer 33 also provides a certain degree of cushioning and shock absorption. When the cylindrical battery 100 is subjected to external forces such as vibration and impact, relative displacement and forces will occur between the holder 31 and the bracket 32. The insulating layer 33 can absorb and disperse these forces through its own elasticity or buffering properties, reducing structural damage that may be caused by hard collisions and friction between the holder 31 and the bracket 32. This helps maintain the overall structural integrity and stability of the adapter 30, thereby ensuring the stability of the internal structure of the entire cylindrical battery 100 and extending the battery's service life.

[0082] Preferably, the bracket 32 ​​is made of plastic material, and the insulating layer 33 can be made of rubber material.

[0083] In some embodiments, the cylindrical battery 100 further includes a protective cover 60 , which is disposed on the periphery of the adapter 30 . The protective cover 60 is provided with a fourth through hole 61 for passing a communication device.

[0084] During daily use, transportation, and installation of the cylindrical battery 100, it is inevitably subject to various external factors, such as collisions and squeezing from other objects. The protective cover 60 of this embodiment is located on the periphery of the adapter 30, enveloping the adapter 30 in a shielded state, forming an outer protective structure that can first withstand these external forces. By virtue of its own strength and structural integrity, it effectively blocks external forces from directly acting on the adapter 30 and other related components within it, preventing these key components from deformation or damage due to physical impact, thereby ensuring the stability of the adapter 30 and even the entire internal structure of the cylindrical battery 100, maintaining the normal charging and discharging functions of the cylindrical battery 100 and the coordinated working state of its components.

[0085] In addition, the protective cover 60 can prevent impurities such as dust, water vapor, and fine particles from entering the interior of the cylindrical battery 100, creating a relatively clean and stable internal environment for components such as the adapter 30, reducing the risk of battery failure due to impurity interference, and extending the service life of the cylindrical battery 100.

[0086] Furthermore, the fourth through hole 61 provided in the protective cover 60 enables the channel reserved for signal transmission at the adapter 30 to continue to extend outward through the fourth through hole 61 on the protective cover 60, ensuring that the signal can be smoothly transmitted from the inside of the cylindrical battery 100 to the external environment, avoiding the situation where the wireless signal cannot be smoothly transmitted due to the obstruction of the protective cover 60, and ensuring that external monitoring equipment can timely and accurately receive data information of the battery cells 20 inside the cylindrical battery 100, thereby facilitating effective real-time monitoring and management of the cylindrical battery 100.

[0087] In some embodiments, the cylindrical battery 100 further includes a snap-fit ​​structure 70 , which includes a groove 71 and a hook 72 respectively provided on the cover plate 41 and the adapter 30 . The groove 71 and the hook 72 engage with each other to connect the cover plate 41 and the adapter 30 .

[0088] During the assembly process of the cylindrical battery 100, the hook 72 is accurately embedded in the groove 71 to form a snap fit between the two, thereby tightly connecting the cover plate 41 and the adapter 30 together, thereby constructing a stable and effective connection method, effectively preventing problems such as loosening and detachment between the cover plate 41 and the adapter 30, ensuring the integrity and stability of the internal structure of the cylindrical battery 100, maintaining a good collaborative working state between the various components, and ensuring that the normal charging and discharging functions of the battery are not affected.

[0089] Compared to some traditional connection methods (such as screw fastening), the use of the snap structure 70 greatly simplifies the assembly operation between the cover plate 41 and the adapter 30. The operator only needs to align the hook 72 with the groove 71 and apply appropriate pressure to lock it into place to complete the connection. There is no need to use additional tools (such as screwdrivers) for tightening. This not only speeds up assembly, but also effectively reduces the possibility of human assembly errors caused by complex operations, thereby improving the overall production efficiency and assembly quality of the cylindrical battery 100.

[0090] It should be understood that the groove 71 can be set on the cover 41, and the hook 72 can be correspondingly set on the adapter 30; the groove 71 can also be set on the adapter 30, and the hook 72 can be correspondingly set on the cover 41. The setting can be selected according to actual conditions, and the embodiment of the present application is not limited here.

[0091] The present application also provides a battery pack comprising a housing and at least one cylindrical battery 100 as described above, mounted within the housing. Because the battery pack utilizes all of the technical solutions of all of the aforementioned embodiments of the cylindrical battery 100, the battery pack of the present invention also possesses at least all of the beneficial effects of the technical solutions of the aforementioned embodiments, which will not be detailed here.

[0092] The above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications based on the above description are possible. It is not possible to enumerate all embodiments here. Any obvious variations or modifications arising from the technical solutions of the present invention remain within the scope of protection of the present invention.

Claims

1. A cylindrical battery, characterized in that: include: case; A battery cell is housed in the housing, and an end of the battery cell has a tab; The adapter seat has a first end and a second end extending along a first direction, wherein the first end is connected to the housing; a top cover assembly connected to the second end, the top cover assembly comprising a cover plate and a pole assembly, the cover plate being connected to the second end, the pole assembly being passed through the cover plate and electrically connected to the tab; A BMS module is provided on a side of the cover plate facing the tab, and is used to collect data of the battery cell and transmit the data of the battery cell.

2. The cylindrical battery according to claim 1, characterized in that: The pole assembly includes a pole and a tab connector. The pole is arranged on a side of the cover plate away from the tab. The tab connector is arranged between the pole and the tab, and the tab connector electrically connects the pole and the tab.

3. The cylindrical battery according to claim 2, characterized in that: One end of the tab connector located in the first direction abuts against the tab, and the other end of the tab connector located in the first direction is connected to a surface of the cover plate facing the tab and is electrically connected to the BMS module; The cover plate is a conductive cover plate, and the BMS module, pole column, and tab connector are electrically connected to the conductive cover plate respectively.

4. The cylindrical battery according to claim 3, characterized in that: The BMS module includes an information collection unit and a wireless communication unit. The information collection unit and the wireless communication unit are arranged on the side of the conductive cover facing the electrode ear. The information collection unit is used to collect data of the battery cell, and the wireless communication unit is used to wirelessly transmit the data of the battery cell.

5. The cylindrical battery according to any one of claims 2 to 4, characterized in that: The tab connector includes a pre-stressed part, an elastic part and an adapter, one end of the adapter abuts against the tab, and the other end is connected to the side of the cover plate facing the tab and is electrically connected to the BMS module; the pre-stressed part and the elastic part are located in the adapter, one end of the pre-stressed part located in the first direction abuts against the inner wall of the adapter, the other end of the pre-stressed part located in the first direction is connected to one end of the elastic part, and the other end of the elastic part close to the cover plate abuts against the cover plate.

6. The cylindrical battery according to any one of claims 1 to 4, characterized in that: The adapter includes a card seat and a bracket, the card seat includes a support plate and a plug-in component, the support plate and the plug-in component are connected in the first direction, the first end is configured at an end of the plug-in component facing away from the support plate, the first end is inserted between the housing and the battery cell, and the support plate is provided with a first through hole; The bracket includes a bottom wall connected to the support plate, and a side wall connected to the bottom wall. The second end is constructed at an end of the side wall facing away from the bottom wall. The bottom wall is provided with a second through hole connected to the first through hole. The pole assembly is passed through the first through hole and the second through hole to be electrically connected to the pole ear.

7. The cylindrical battery according to claim 6, characterized in that: The side wall is provided with a third through hole for passing communication equipment.

8. The cylindrical battery according to claim 6, characterized in that: The card seat is made of metal material, and the adapter seat further includes an insulating layer, which is arranged between the bottom wall and the support plate.

9. The cylindrical battery according to any one of claims 1 to 4, characterized in that: The cylindrical battery further includes a protective cover, which is arranged on the periphery of the adapter. The protective cover is provided with a fourth through hole for passing a communication device.

10. A battery pack, characterized in that: The invention comprises a box body and at least one cylindrical battery according to any one of claims 1 to 9, wherein the cylindrical battery is installed in the box body.

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