Battery pack and power battery system

Abstract

The utility model discloses a battery pack and a power battery system, the battery pack comprises a battery cell, the battery cell comprises a top cover, at least one matching part is arranged on the top cover, an antenna is provided with at least one subsection, at least one installation part is arranged on the at least one subsection, and the at least one subsection is connected with the top cover through the at least one mounting part and the at least one matching part. According to the battery pack disclosed by the utility model, the antenna can be stably mounted by adopting a mechanical matching mode between the mounting part of the antenna and the matching part of the battery cell top cover. Compared with an existing adhesive fixing mode, the technical scheme not only avoids the problem of antenna fixing failure caused by adhesive aging, but also enables the antenna to be conveniently disassembled when the antenna needs to be maintained and replaced, and reduces the maintenance cost and difficulty.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery pack and a power battery system. Background Technology

[0002] A Battery Management System (BMS) is the core system that ensures the safe and stable operation of a power battery pack. It can monitor the battery status in real time and perform effective management and control. A wireless BMS transmits the collected battery information wirelessly, which not only improves the convenience of communication but also significantly reduces the cost of wiring harnesses.

[0003] In existing wireless BMS architectures, antennas are mostly mounted on the top cover of the battery pack. However, there is no good way to secure the antennas. When the antenna or battery module needs to be replaced or repaired, the disassembly process is complicated and time-consuming, and may even damage the antenna or battery module. Utility Model Content

[0004] The main purpose of this invention is to propose a battery pack that aims to solve the problem of difficult disassembly and maintenance of antennas.

[0005] To achieve the above objectives, this utility model proposes a battery pack, which includes:

[0006] A battery cell, the battery cell including a top cover, the top cover being provided with at least one mating part;

[0007] An antenna is disposed on the top cover, the antenna having at least one segment, and at least one mounting portion is provided on at least one segment;

[0008] At least one of the segments is connected to the top cover via at least one mounting portion and at least one mating portion.

[0009] In some embodiments, at least one metal wire is embedded inside at least one segment of the antenna.

[0010] In some embodiments, at least one end of the antenna is provided with a plug-in terminal for electrical connection to an external control board.

[0011] In some embodiments, the mating part includes a fixing post disposed on the edge of the top cover, and the mounting part includes a positioning hole disposed on the antenna for fitting with the fixing post. The antenna and the top cover are connected through the fixing post and the positioning hole.

[0012] In some embodiments, the antenna edge is provided with a lug, and the positioning hole is located in the lug.

[0013] In some embodiments, the fixing post and the positioning hole are arranged in an elliptical shape.

[0014] In some embodiments, the mating portion includes an antenna guide groove provided on the top cover, and the antenna is bonded to the top cover.

[0015] In some embodiments, the mating part includes a crimping post disposed on the edge of the top cover, and the antenna is fixed between two adjacent battery cells by means of heat-fused crimping post.

[0016] In some embodiments, the lug is integrally formed with the antenna.

[0017] This utility model further proposes a power battery system, including a wireless battery management system, such as the battery pack in the aforementioned embodiment.

[0018] The beneficial effects of this utility model are as follows: by providing at least one mounting part on at least one segment of the antenna and using a mechanical engagement with at least one mating part of the battery cell top cover, the antenna can be securely installed. This design effectively improves the antenna's fixation reliability and simplifies the disassembly process when maintenance or replacement is required, thereby reducing maintenance costs and operational difficulty, and significantly improving the convenience and long-term reliability of the battery management system. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the battery pack structure in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 A schematic diagram of the antenna structure is shown;

[0022] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.

[0023] Explanation of icon numbers:

[0024] 100. Battery cell; 101. Top cover; 105. Mating part; 102. Fixing post; 103. Antenna guide groove; 104. Crimping post; 200. Antenna; 206. Segment; 204. Mounting part; 201a. Positioning hole; 201. Lug; 202. Metal wire; 203. Plug-in terminal; 300. Main control module.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0029] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] In the Battery Management System (BMS) of modern electric vehicles, the antenna plays a crucial role. It enables wireless communication within the battery pack, ensuring stable transmission of cell status data. One end of the antenna is plugged into the main control module. Through this connection, the antenna transmits the collected cell information to the main control module for centralized processing and monitoring. However, in existing technologies, BMS antennas are typically fixed to the top cover of the cell using adhesive. While this adhesive method meets basic installation requirements initially, it has many drawbacks in long-term use. For example, the adhesive can age or fail due to environmental changes, causing the antenna to loosen. Furthermore, adhesive-fixed antennas are difficult to remove during disassembly and maintenance, potentially damaging the antenna or the cell, increasing maintenance costs and operational difficulty. Therefore, this invention proposes an improved battery pack design that uses a reasonable structure to allow the antenna to be securely mounted on the top cover of the cell while facilitating disassembly and maintenance. Specifically, refer to... Figure 1 , Figure 2 and Figure 3 . Figure 1 This is a schematic diagram of the battery pack structure in one embodiment of the present invention. Figure 2 for Figure 1 A magnified view of a portion of point A in the middle. Figure 3 The diagram shows the structure of the antenna.

[0031] This utility model embodiment provides a battery pack, which includes:

[0032] The battery cell 100 includes a top cover 101, and at least one mating part 105 is provided on the top cover 101.

[0033] Antenna 200 is disposed on top cover 101. Antenna 200 has at least one segment 206 and at least one mounting part 204 is provided on at least one segment 206.

[0034] At least one segment 206 is connected to the top cover 101 via at least one mounting part 204 and at least one mating part 105.

[0035] In this embodiment, the battery cell 100 in the battery pack is a core component of the battery management system, used for storing and releasing electrical energy. Each battery cell 100 includes a top cover 101, which protects the internal structure of the battery cell 100 and provides an interface for installing external components. Furthermore, a data acquisition chip is provided on the top cover 101 to collect the status information of the battery cell 100. The top cover 101 can be made of corrosion-resistant and high-strength materials, such as aluminum alloy or engineering plastics, to ensure its stability in harsh environments. At least one mating part 105 is provided on the top cover 101, which can be a structure for mounting and fixing, such as a fixing post 102.

[0036] In this embodiment, antenna 200 is used to wirelessly transmit the status information of battery cell 100 to achieve real-time monitoring of the battery management system. It should be noted that antenna 200 in this embodiment can be formed by at least one segment 206 (mainly used in scenarios with smaller battery packs), or it can be formed by connecting multiple segments 206 (mainly used in scenarios with larger battery packs).

[0037] The antenna 200 can be arranged in a flat strip shape and can be made of a conductive material (such as copper foil), possessing good conductivity and flexibility to adapt to the layout of the battery pack. The antenna 200 has at least one segment 206, and each segment 206 is provided with at least one mounting portion 204. The mounting portion 204 can have a structure such as a positioning hole 201a. When the mating portion 105 of the top cover 101 is a fixing post 102, the mounting portion 204 of the antenna 200 can be designed as a corresponding positioning hole 201a to cooperate with the fixing post 102 for installation. Furthermore, in some embodiments, the combination of the mounting portion 204 and the mating portion 105 can be alternately arranged. For example, in one segment 206 of the antenna 200, the mounting portion 204 is a positioning hole 201a, and the mating portion 105 corresponding to the top cover 101 is a fixing post 102; while in another segment 206, the mounting portion 204 of the antenna 200 is a fixing post 102, and the mating portion 105 corresponding to the top cover 101 is a positioning hole 201a. This flexible design ensures that the antenna 200 can be securely fixed to the top cover 101 during installation.

[0038] In some embodiments, the mating part 105 on the top cover 101 can be positioned close to the acquisition chip, so that after the antenna 200 is installed, better wireless transmission effect can be obtained.

[0039] With the structure of the mating part 105 and the mounting part 204, the antenna 200 can be securely mounted on the top cover 101 of the battery cell 100. Specifically, firstly, the various segments 206 of the antenna 200 are aligned with the mating part 105 on the top cover 101, and then the antenna 200 is securely mounted by fitting the positioning hole 201a into the fixing post 102. After installation, the antenna 200 can make close contact with the top cover 101, ensuring stable transmission of wireless signals. In addition, the antenna 200 and the acquisition chip transmit and receive data wirelessly. This means that the acquisition chip sends data via wireless signals, the antenna 200 arranged on the top cover 101 receives these signals, and then transmits the data to the main control module 300 through the connector connected to the main control module 300. In some embodiments, the flexibility of the antenna 200 allows it to adapt to slight deformation of the top cover 101, further improving the reliability of the installation. Disassembly is also simple when necessary. The mounting portion 204 of the antenna 200 can be directly removed from the mating portion 105 of the top cover 101, avoiding disassembly difficulties and damage to components caused by adhesive. For example, when it is necessary to replace the antenna 200 or maintain the battery cell 100, this structure can significantly reduce the difficulty of disassembly, while avoiding damage to the antenna 200 and the battery cell 100, thus improving the maintenance efficiency of the system.

[0040] The beneficial effects of this embodiment are as follows: by using a mechanical fit between the mounting portion 204 of the antenna 200 and the mating portion 105 of the top cover 101 of the battery cell 100, the antenna 200 can be securely installed. Compared with adhesive fixing, this technical solution not only avoids the problem of antenna 200 fixing failure due to adhesive aging, but also makes the antenna 200 easy to disassemble when maintenance and replacement are required, reducing maintenance costs and difficulty.

[0041] See Figure 4 In some embodiments, at least one metal wire 202 is embedded inside at least one segment 206 of the antenna 200. It should be noted that the antenna 200 in this embodiment can be formed by at least one segment 206 (mainly used in scenarios with smaller battery packs), or it can be formed by connecting multiple segments 206 (mainly used in scenarios with larger battery packs). The metal wire 202 is embedded inside the segment 206. Specifically, when the antenna 200 has one segment 206, the metal wire 202 is embedded inside that segment 206; when the antenna 200 has multiple connected segments 206, the metal wire 202 is embedded inside all segments 206 (understandably, the length of the metal wire 202 increases accordingly).

[0042] In this embodiment, the antenna 200 can be made of various materials, such as flexible printed circuit boards (FPCs) or flexible flat cables (FFCs). These materials possess good flexibility and durability, enabling them to adapt to the complex spatial layout and bending requirements within the battery pack. In other words, the antenna 200 possesses sufficient mechanical strength within the battery management system while maintaining its conductivity unaffected during bending and installation.

[0043] The metal wire 202 can be made of materials with good conductivity, such as copper or aluminum wire, to ensure low loss and high stability of the signal during transmission.

[0044] Continue reading Figure 1 and Figure 3 In this embodiment, at least one end of the antenna 200 is provided with a plug-in terminal 203 for electrical connection with an external control board. For details, please refer to [reference needed]. Figure 2 One end of the antenna 200 can be connected to the external control board in the battery management system via a connector terminal to achieve a reliable electrical connection while making the installation and removal of the antenna 200 easier. This design not only enables the antenna 200 to wirelessly transmit the status information of individual battery cells, but also allows it to transmit and receive data through the main control module 300, thereby ensuring stable communication within the battery management system.

[0045] The antenna 200 works by receiving and transmitting electromagnetic wave signals through its internal metal wire 202, enabling wireless communication. Specifically, after the acquisition chip collects the status data of a single battery cell, it transmits it wirelessly to the antenna 200. Upon receiving these signals, the antenna 200 transmits the data to the main control module 300 for processing and monitoring through a physical connection. Furthermore, the internal highly conductive metal wire 202 ensures low signal loss and high efficiency in signal transmission.

[0046] Continue reading Figure 2 In this embodiment, the mating part 105 includes a fixing post 102 provided on the edge of the top cover 101, and the mounting part 204 includes a positioning hole 201a provided on the antenna 200 for fitting with the fixing post 102. The antenna 200 and the top cover 101 are connected through the fixing post 102 and the positioning hole 201a.

[0047] In this embodiment, the mating part 105 is set as a fixing post 102 located at the edge of the top cover 101, and the mounting part 204 is a positioning hole 201a provided on the antenna 200, thereby realizing a stable connection between the antenna 200 and the top cover 101.

[0048] Specifically, the fixing post 102 can be formed using various processes, depending on the material of the top cover 101. For example, if the top cover 101 is made of plastic, the fixing post 102 can be integrally molded with the top cover 101 using injection molding to ensure sufficient mechanical strength and durability. If the top cover 101 is made of a metal material (such as aluminum alloy), the fixing post 102 can be formed using die casting or subsequent machining (such as turning or milling) to ensure dimensional accuracy and strength requirements.

[0049] The positioning hole 201a of the mounting part 204 can be formed on the antenna 200, or it can be arranged in other ways (e.g., a lug 201 is provided on the side of the antenna 200 for forming the mounting hole). The positioning hole 201a is used to fit with the fixing post 102 to achieve a stable installation of the antenna 200. The positioning hole 201a can be formed by laser cutting or mechanical punching. Laser cutting is a common method on flexible printed circuit boards (FPCs) or flexible flat cables (FFCs) because it has high precision and does not generate excessive mechanical stress on the flexible material. In addition, mechanical punching is also an optional method, suitable for efficient manufacturing processes that require mass production.

[0050] During installation, align the positioning hole 201a on the antenna 200 with the fixing post 102 on the edge of the top cover 101, and then gently press to allow the fixing post 102 to pass through the positioning hole 201a, thus achieving a fixed connection between the antenna 200 and the top cover 101. This connection method ensures a secure installation of the antenna 200 and provides good vibration resistance during the operation of the battery management system. At the same time, this mechanical connection method facilitates subsequent maintenance and replacement, avoiding the problem of the antenna 200 loosening due to adhesive aging.

[0051] See Figure 4 In this embodiment, the antenna 200 has a lug 201 on its edge, and the positioning hole 201a is located in the lug 201.

[0052] In this embodiment, the antenna 200 has a lug 201 on its edge, and the positioning hole 201a is located in the lug 201, thereby realizing the mating installation with the fixing post 102 of the top cover 101.

[0053] Specifically, the lug 201 can be part of the antenna 200, formed by extending an additional portion from the edge of the antenna 200. The lug 201 can be integrally formed using the manufacturing process of flexible printed circuit boards (FPC) or flexible flat cables (FFC). During the design phase of the flexible circuit, by reserving a corresponding shape in the edge region, the lug 201 can be directly formed during cutting or pressing.

[0054] The positioning hole 201a is located in the lug 201 and is used to fit with the fixing post 102 on the top cover 101, thereby achieving stable installation of the antenna 200. The positioning hole 201a can be formed by laser cutting or mechanical punching. Laser cutting is a high-precision processing method that does not generate excessive mechanical stress on flexible materials, and is suitable for processing flexible materials such as FPC or FFC. Mechanical punching, on the other hand, is suitable for efficient manufacturing processes requiring batch processing and can quickly form the positioning hole 201a in the lug 201.

[0055] The positioning hole 201a is located in the lug 201 of the antenna 200. The lug 201 provides additional installation space, allowing the positioning hole 201a to be more precisely aligned with the fixing post 102, ensuring the stability of the antenna 200 after installation. Furthermore, this design avoids directly drilling holes in the main part of the antenna 200, thus protecting the integrity of the flexible circuitry and reducing mechanical stress and potential breakage risks caused by holes. Simultaneously, the lug 201 structure makes the antenna 200 easier to install and remove, increases positioning accuracy, and ensures the reliability of wireless signal transmission.

[0056] In some embodiments, the fixing post 102 and the positioning hole 201a are arranged in an elliptical shape to achieve a more flexible and stable connection between the antenna 200 and the top cover 101. This elliptical design allows the position of the antenna 200 to be adjusted within a certain range during installation, providing greater installation tolerance and reducing the impact of manufacturing or assembly errors.

[0057] The elliptical mounting post 102 and positioning hole 201a design offer several advantages. First, it increases flexibility during installation, allowing the antenna 200 to be fine-tuned during installation to better adapt to different installation environments. Second, the elliptical shape disperses stress, reducing the impact of localized stress concentration on the antenna 200. For example, when the battery cell 100 expands, the positioning hole 201a, with its elliptical positioning control design, ensures that the antenna 200 does not stretch or deform. Furthermore, this design improves vibration resistance, making the antenna 200 more stable during operation and ensuring the long-term reliability of the battery management system.

[0058] Continue reading Figure 2 In this embodiment, the mating part 105 includes an antenna guide groove 103 provided on the top cover 101, and the antenna 200 is bonded to the top cover 101.

[0059] In this embodiment, the antenna 200 can be directly placed in the antenna guide groove 103, which maximizes installation efficiency and facilitates automated operation. To further ensure stable installation, adhesive can be applied to the antenna guide groove 103 beforehand to fix it in place, thereby achieving a more secure installation.

[0060] Specifically, the antenna guide groove 103 is part of the top cover 101 and can be directly formed on the top cover 101 by injection molding or machining. The guide groove is designed to provide a precise path to accommodate the antenna 200, allowing the antenna 200 to be accurately positioned at a designated location on the top cover 101. The depth and width of the guide groove can be designed according to the dimensions of the antenna 200 to ensure that the antenna 200 fits snugly within the guide groove and has sufficient contact area during bonding.

[0061] When installing the antenna 200, first accurately place it within the antenna guide groove 103 of the top cover 101. Then, use an adhesive to firmly bond the antenna 200 to the inner wall of the guide groove. The adhesive can be a material suitable for high-temperature environments and with good adhesion properties, such as epoxy resin or silicone adhesive. This bonding method ensures that the antenna 200 remains stable during battery pack operation and will not loosen due to vibration or environmental changes.

[0062] The antenna 200 is placed directly within the guide groove, which provides a clear installation position, allowing for more precise placement of the antenna 200, higher installation efficiency, and reduced installation errors. Secondly, the guide groove enhances the adhesive's effectiveness and increases the bonding area during the bonding process, thereby ensuring the stability of the antenna 200.

[0063] Continue reading Figure 2 In this embodiment, the mating part 105 includes a crimping post 104 disposed on the edge of the top cover 101, and the antenna 200 is fixed between two adjacent battery cells 100 by means of hot-melt crimping post 104.

[0064] In this embodiment, the crimping post 104 can be used to directly crimp the antenna 200 between the two battery cells 100 after heat fusion. In one embodiment, the mating part 105 may further include a heat fusion post disposed on the top cover 101, and a connector connecting adjacent heat fusion posts of the top cover 101. Specifically, the antenna 200 can be placed between two heat fusion posts of the top cover 101 through a connector (which may be made of metal, etc.), with one end of the connector contacting the heat fusion post of one battery cell 100 and the other end contacting the heat fusion post of the other battery cell 100. In this way, after the heat fusion post is heat-fused, the connector can crimp the antenna 200 between the two battery cells 100, while also applying a tension force to the two battery cells 100 to achieve a firm connection.

[0065] In some embodiments, the antenna 200 can be fixed to the top cover 101 of the cell 100 by means of a crimping post 104 and a connector, based on the antenna guide groove 103 provided in the top cover 101.

[0066] Furthermore, the crimp posts 104 may be part of the top cover 101 structure, typically integrally manufactured onto the edge of the top cover 101 of the cell 100 via injection molding or die casting. These crimp posts 104 serve to provide connection points during the heat fusion process, enabling a tight physical bond between the cells 100. The crimp posts 104 are designed with appropriate length and diameter to effectively secure the antenna 200 and connect adjacent cells 100 during heat fusion.

[0067] During installation, the antenna 200 is placed between the crimping posts 104 of two adjacent battery cells 100, and then the crimping posts 104 are heat-fused. The heat-fusion process softens the crimping posts 104 upon heating, and during pressurization, firmly secures the antenna 200 and the adjacent battery cells 100 together. In this way, the antenna 200 is not only securely crimped onto the top cover 101 of the battery cells 100, but also the two adjacent battery cells 100 are reliably mechanically connected via the crimping posts 104.

[0068] In some embodiments, two metal wires 202 for wireless information transmission are embedded inside the antenna 200. These metal wires 202 are encapsulated with a flexible material to improve the transmission capability and reliability of the antenna 200.

[0069] In this embodiment, the antenna 200 can be constructed from a flexible printed circuit board (FPC) or a flexible flat cable (FFC), and the two embedded metal wires 202 can be made of highly conductive materials such as copper or aluminum. Copper wire is the preferred material due to its excellent conductivity and low transmission loss, while aluminum wire can also be considered in some scenarios where weight reduction is required. The two metal wires 202 are independent of each other and can perform dual-channel functions in wireless transmission to improve transmission stability and data processing capabilities.

[0070] Thus, the dual-wire design enables redundant signal transmission; that is, if one metal wire 202 fails, the other metal wire 202 can still continue to operate, thereby improving system reliability. This redundant structure is suitable for battery management systems with high requirements for communication stability, ensuring that the status information of the cell 100 can be transmitted to the main control module 300 in a timely and accurate manner.

[0071] In some embodiments, the lug (201) is integrally formed with the antenna (200). This integral forming can be achieved by laser cutting, for example, by directly cutting the outline of the lug onto the antenna (200) using laser cutting technology, and then further cutting positioning holes (201a) onto the lug (201), thereby forming a lug (210) structure integrated with the antenna (200). Since the integrally formed lug (210) is made directly from the material of the antenna (200), it avoids the problem of insufficient connection strength that may occur in traditional welding or bonding methods. The overall structure has no fracture points, enabling the antenna (200) to better resist vibration and external stress during operation, significantly improving the mechanical strength of the antenna (200).

[0072] The present invention further proposes a power battery system, including a wireless battery management system and a battery pack as described in the foregoing embodiments. The specific structure of the battery pack is as described in the foregoing embodiments. Since the present power battery system adopts all the technical solutions of all the foregoing embodiments, it has at least all the technical effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0073] In this embodiment, the main control module 300 of the wireless battery management system is connected to the antenna 200 of the battery pack to monitor each cell 100. Each cell 100 wirelessly transmits its collected status data (such as voltage, temperature, etc.) to the BMS main control module 300 via the antenna 200. The antenna 200 is mounted on the top cover 101 of the cell 100, and the cooperation between the antenna 200 and the top cover 101 ensures stable signal transmission. The wireless BMS can receive data from each cell 100 and centralize this data to the main control module 300 for real-time analysis and management via wireless communication. This cooperative working mode allows each cell 100 in the battery pack to independently collect data and transmit it wirelessly, ensuring that the status information of each cell 100 in the system is accurately transmitted to the BMS main control module 300. At the same time, the antenna 200 is securely installed by using a mechanical fit between the mounting part 204 of the antenna 200 and the mating part 105 of the top cover 101 of the cell 100. Compared to existing adhesive fixing methods, this technical solution not only avoids the problem of antenna 200 fixing failure due to adhesive aging, but also makes antenna 200 easy to disassemble when maintenance and replacement are required, reducing maintenance costs and difficulty.

[0074] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A battery pack, characterized in that, include: A battery cell, the battery cell including a top cover, the top cover being provided with at least one mating part; An antenna is disposed on the top cover, the antenna having at least one segment, and at least one mounting portion is provided on at least one segment; At least one of the segments is connected to the top cover via at least one mounting portion and at least one mating portion.

2. The battery pack according to claim 1, characterized in that, At least one metal wire is embedded inside at least one of the segments of the antenna.

3. The battery pack according to claim 2, characterized in that, The antenna is provided with a plug-in terminal at at least one end for electrical connection to an external control board.

4. The battery pack according to claim 1, characterized in that, The mating part includes a fixing post located on the edge of the top cover, and the mounting part includes a positioning hole on the antenna for fitting with the fixing post. The antenna and the top cover are connected through the fixing post and the positioning hole.

5. The battery pack according to claim 4, characterized in that, The antenna has a lug on its edge, and the positioning hole is located in the lug.

6. The battery pack according to claim 4, characterized in that, The fixing post and the positioning hole are arranged in an elliptical shape.

7. The battery pack according to claim 3, characterized in that, The mating part includes an antenna guide groove provided on the top cover, and the antenna is bonded to the top cover.

8. The battery pack according to claim 3, characterized in that, The mating part includes a crimping post located at the edge of the top cover, and the antenna is fixed between two adjacent battery cells by means of heat-fused crimping post.

9. The battery pack according to claim 5, characterized in that, The lug is integrally formed with the antenna.

10. A power battery system, comprising a wireless battery management system, characterized in that, It also includes the battery pack as described in any one of claims 1 to 9.

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