Single cell and battery pack

Abstract

This utility model discloses a single-cell battery and a battery pack. The single-cell battery includes: a housing with a cavity; a cell disposed in the cavity; a top cover assembly including a top cover and a sealing element, the top cover covering the housing and sealing the cavity, a mounting groove on the side of the top cover facing away from the cavity, a pressure sampling hole penetrating the top cover on the bottom wall of the mounting groove, the sealing element being disposed on the side of the top cover facing the cavity, sealing one end opening of the pressure sampling hole facing the cavity, and deformable according to changes in the pressure inside the cavity; and a sampling module housed in the mounting groove and sealing the other end opening of the pressure sampling hole facing away from the cavity, the sampling module including a pressure detection unit for detecting the pressure of the pressure sampling hole. This utility model's single-cell battery improves the maintenance convenience of the sampling module.

Description

Technical Field

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

[0002] In recent years, with the booming development of new energy vehicles, higher requirements have been put forward for the monitoring of power batteries.

[0003] Traditional BMS (Battery Management System) uses cables to transmit battery data, resulting in cables between batteries and between batteries and control devices. This leads to a heavy vehicle load and affects driving range. Therefore, wireless BMS has emerged, replacing physical cables with wireless communication modules. This reduces overall vehicle weight, increases energy density, significantly simplifies system architecture, and lowers production costs, becoming an important direction for driving technological innovation in new energy vehicles.

[0004] In the relevant wireless BMS architecture, a typical air pressure acquisition scheme places the data acquisition module inside the battery and monitors the air pressure inside the battery through a built-in air pressure sensor. When the acquisition module or sensor fails, the battery top cover needs to be removed for repair. The operation process involves the destruction and reconstruction of multiple sealing processes, resulting in low maintenance efficiency and the risk of secondary damage. Utility Model Content

[0005] The main purpose of this invention is to propose a single-cell battery that aims to solve the technical problem of inconvenient maintenance of the acquisition module in the existing battery wireless BMS architecture.

[0006] To achieve the above objectives, this utility model proposes a single-cell battery, which includes:

[0007] A housing having a receiving cavity;

[0008] The battery cell is disposed in the accommodating cavity;

[0009] A top cover assembly includes a top cover and a sealing element. The top cover is disposed on the housing and seals the accommodating cavity. The side of the top cover facing away from the accommodating cavity is provided with a mounting groove. The bottom wall of the mounting groove is provided with a pressure sampling hole penetrating the top cover. The sealing element is disposed on the side of the top cover facing away from the accommodating cavity. The sealing element seals the end opening of the pressure sampling hole facing the accommodating cavity and can deform according to the pressure changes in the accommodating cavity.

[0010] A data acquisition module is housed in the mounting slot and closes the other end of the air pressure acquisition hole facing away from the accommodating cavity. The data acquisition module includes an air pressure detection unit for detecting the air pressure of the air pressure acquisition hole.

[0011] Optionally, the acquisition module further includes a bottom shell, a top shell, and an acquisition plate, with the air pressure detection unit connected to the acquisition plate;

[0012] The bottom shell has a receiving cavity and a clearance opening adapted to the air pressure detection unit. The acquisition plate is housed in the receiving cavity, and the air pressure detection unit is exposed through the clearance opening.

[0013] The top shell covers the bottom shell and is detachably connected to the bottom shell.

[0014] Optionally, the bottom wall of the mounting groove is provided with a receiving groove, and the air pressure collection hole is located on the bottom wall of the receiving groove;

[0015] The acquisition module also includes a sealing sleeve with an air passage. The sealing sleeve is located in the receiving groove and abuts against the bottom shell. The clearance opening, the air passage, and the air pressure acquisition hole are connected in sequence.

[0016] Optionally, the acquisition module further includes a sealing ring, which is disposed on the side of the bottom shell facing the bottom wall of the mounting groove. The inner diameter of the sealing ring is larger than the outer diameter of the sealing sleeve. The sealing ring is disposed around the receiving groove and abuts against the bottom wall of the mounting groove.

[0017] Optionally, the acquisition module further includes a wireless transmission unit, which is disposed on the acquisition board and electrically connected to the acquisition board, and is used to transmit the data information acquired by the acquisition module to an external device;

[0018] The top shell has an opening, which is positioned opposite to the wireless transmission unit, for transmitting signals emitted by the wireless transmission unit.

[0019] Optionally, the bottom shell is glued to the bottom wall of the receiving groove, and the bottom surface of the bottom shell is provided with a plurality of adhesive-blocking ribs, which are circumferentially arranged at the edge of the bottom shell.

[0020] Optionally, the top cover assembly further includes a positive terminal and a negative terminal, which are disposed through the top cover and spaced apart.

[0021] The acquisition module further includes a first FPC cable, which is laid on the side of the top cover facing away from the accommodating cavity and electrically connected to the acquisition board. One end of the first FPC cable is electrically connected to the positive terminal, and the other end of the first FPC cable is electrically connected to the negative terminal, for detecting the battery voltage and / or current.

[0022] Optionally, the first FPC cable is provided with a temperature detection unit for detecting the battery temperature; and / or,

[0023] The top cover assembly further includes a first encapsulation ring and a second encapsulation ring. One end of the first FPC cable is wound around the positive terminal and encapsulated by the first encapsulation ring, and the other end of the first FPC cable is wound around the negative terminal and encapsulated by the second encapsulation ring.

[0024] Optionally, the acquisition module further includes a second FPC cable, which extends from the side of the top cover away from the accommodating cavity to the side of the housing and is electrically connected to the acquisition board. The second FPC cable is provided with a strain detection section for detecting the strain generated when the battery deforms.

[0025] This utility model also proposes a battery pack, which includes:

[0026] Box;

[0027] The battery management system is located in the enclosure;

[0028] Multiple individual batteries as described above are housed within the casing, and the acquisition modules of all individual batteries are communicatively connected to the battery management system.

[0029] In this novel single-cell battery, when the gas pressure inside the housing cavity changes, the sealing element deforms under the force of the gas pressure, thereby compressing the gas space in the gas pressure acquisition hole. This causes a change in the gas pressure inside the acquisition hole, and the gas pressure detection unit of the acquisition module detects the gas pressure inside the acquisition hole to accurately reflect the actual gas pressure inside the housing cavity. In other words, the acquisition module in this novel single-cell battery is located on the outer surface of the top cover. By setting a gas pressure acquisition hole on the top cover and using a pressure-deformable sealing element, accurate monitoring of the gas pressure inside the housing cavity is cleverly achieved. When the acquisition module or gas pressure detection unit malfunctions or other abnormal conditions require maintenance, the acquisition module can be easily disassembled without removing the top cover, greatly simplifying the maintenance process and avoiding the risk of secondary damage, thus improving maintenance convenience. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a single battery cell in one embodiment of the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of a portion of a single battery cell in the embodiment;

[0032] Figure 3 for Figure 1 An exploded view of a portion of a single battery cell in the embodiment from one perspective;

[0033] Figure 4 for Figure 1 An exploded view of a portion of a single battery cell in the embodiment from another perspective;

[0034] Figure 5 for Figure 1 An exploded view of the data acquisition module of a single battery cell in the embodiment;

[0035] Figure 6 for Figure 1 A schematic diagram of the bottom shell of the data acquisition module for a single cell in the embodiment. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0039] 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.

[0040] This utility model embodiment proposes a single-cell battery 100, referring to... Figures 1 to 4 The single cell 100 includes:

[0041] Housing 110, housing 110 having a receiving cavity;

[0042] The battery cell is located within the housing cavity;

[0043] The top cover assembly 120 includes a top cover 121 and a sealing element 122. The top cover 121 covers the housing 110 and closes the accommodating cavity. The side of the top cover 121 facing away from the accommodating cavity is provided with a mounting groove 1211. The bottom wall of the mounting groove 1211 is provided with a pressure collection hole 1212 that penetrates the top cover 121. The sealing element 122 is provided on the side of the top cover 121 facing the accommodating cavity. The sealing element 122 covers the end opening of the pressure collection hole 1212 facing the accommodating cavity and can deform according to the change of air pressure in the accommodating cavity.

[0044] The acquisition module 130 is housed in the mounting slot 1211 and closes the other end of the air pressure acquisition hole facing away from the housing cavity. The acquisition module 130 includes an air pressure detection unit 131, which is used to detect the air pressure of the air pressure acquisition hole 1212.

[0045] The single battery 100 involved in this embodiment is the basic unit constituting the battery pack. It is an independent electrochemical energy storage device that can convert chemical energy into electrical energy through electrochemical reactions, or convert electrical energy into chemical energy for storage. The single battery 100 can be a square battery and is used in electric vehicles and other fields.

[0046] The casing 110 can be made of high-strength, corrosion-resistant metal or composite material and has an internal accommodating cavity. This cavity provides a safe and stable space for the battery cell, electrolyte, etc., while effectively resisting external impacts and protecting internal components from damage. The battery cell, as the core component for energy storage and release, is housed within the cavity. The type of battery cell can be selected according to actual application requirements, such as a lithium-ion cell. During operation, the battery cell achieves the mutual conversion of electrical energy and chemical energy through chemical reactions, providing a stable power output to external devices.

[0047] The top cover assembly 120 comprises a top cover 121 and a sealing element 122. The top cover 121 is placed on top of the housing 110, tightly sealing the accommodating cavity and protecting the internal components while preventing dust, moisture, and other impurities from entering the battery. The side of the top cover 121 facing away from the accommodating cavity has a mounting groove 1211, and the bottom wall of the mounting groove 1211 has a pressure acquisition hole 1212 penetrating the top cover 121. The function of the pressure acquisition hole 1212 is to transmit the internal pressure information of the battery to the outside of the top cover 121. The diameter and number of pressure acquisition holes 1212 can be rationally designed according to the battery capacity, size, and actual pressure detection accuracy requirements. The sealing element 122 is located on the side of the top cover 121 facing the accommodating cavity, is made of high-quality elastic material, and seals the end of the pressure acquisition hole 1212 facing the accommodating cavity. The sealing element 122 can deform in response to changes in air pressure within the accommodating cavity, ensuring that the air pressure in the air pressure acquisition hole 1212 changes synchronously with the air pressure within the accommodating cavity. Specifically, the sealing element 122 can be made of aluminum foil, or it can be made of materials with good elasticity and sealing properties, such as silicone. Silicone not only exhibits significant elastic deformation when air pressure changes, accurately transmitting pressure variations, but also has good corrosion resistance, enabling it to adapt to the chemical environment inside the battery and ensuring long-term stable performance. Other materials may also be used besides the examples described above; this embodiment does not limit the specific materials used.

[0048] The data acquisition module 130 is housed within the mounting slot 1211, corresponding to the other end of the sealed pressure acquisition hole 1212 facing away from the accommodating cavity. The data acquisition module 130 includes a pressure detection unit 131, which is connected to the pressure acquisition hole 1212. By detecting the pressure within the pressure acquisition hole 1212, the actual pressure within the battery accommodating cavity can be accurately obtained. The data acquisition module 130 can also integrate other functional modules, such as temperature detection and voltage detection, to achieve comprehensive monitoring of the battery status. The data acquisition module 130 can be installed in the mounting slot 1211 using a snap-fit ​​connection. Snap-fits are provided on the wall of the mounting slot 1211, and corresponding slots are provided on the outer shell of the data acquisition module 130. The quick installation and removal of the data acquisition module 130 through the cooperation of the snap-fits and slots further improves maintenance convenience. Alternatively, other methods can be used, such as adhesive bonding.

[0049] When the single battery cell 100 is charging or discharging, or when it is affected by changes in external ambient temperature and pressure, the air pressure inside the housing cavity of the casing 110 will change accordingly. The changing air pressure inside the housing cavity will directly act on the seal 122. Due to the deformation characteristics of the seal 122, it will deform accordingly according to the change in air pressure inside the housing cavity. The deformation of the seal 122 will compress the gas space of the air pressure acquisition hole, causing a synchronous change in the air pressure inside the air pressure acquisition hole 1212. The air pressure detection unit 131 of the acquisition module 130 can accurately reflect the real air pressure inside the housing cavity by sensing the change in air pressure inside the air pressure acquisition hole 1212.

[0050] When maintenance is required on the data acquisition module 130 or the air pressure detection unit 131, since the data acquisition module 130 is located on the outer surface of the top cover 121, operators can easily disassemble and install the data acquisition module 130 directly on the outer surface of the top cover 121 without disassembling the top cover 121. This greatly simplifies the maintenance process, saves maintenance time and labor costs, and avoids secondary damage to the battery that may be caused by disassembling the top cover 121.

[0051] In this embodiment, the single-cell battery 100 has the data acquisition module 130 disposed on the outer surface of the top cover 121. By providing a pressure acquisition hole 1212 in the top cover 121 and cooperating with a pressure-deformable seal 122, accurate monitoring of the air pressure inside the cavity of the housing 110 is cleverly achieved. At the same time, when the data acquisition module 130 or the air pressure detection unit 131 malfunctions or other abnormal conditions and requires maintenance, the data acquisition module 130 can be easily disassembled and maintained without removing the top cover 121, greatly simplifying the maintenance process, avoiding the risk of secondary damage, and thus improving maintenance convenience.

[0052] In some embodiments, refer to Figure 5The acquisition module 130 also includes a bottom shell 132, a top shell 133 and an acquisition plate 134, with the air pressure detection unit 131 connected to the acquisition plate 134;

[0053] The bottom shell 132 has a receiving cavity and a relief opening 1321 adapted to the air pressure detection unit 131. The collection plate 134 is housed in the receiving cavity, and the air pressure detection unit 131 is exposed from the relief opening 1321.

[0054] The top shell 133 covers the bottom shell 132 and is detachably connected to the bottom shell 132.

[0055] In this embodiment, the acquisition module 130 is further optimized in design, comprising a bottom shell 132, a top shell 133, and an acquisition plate 134. The bottom shell 132 has a receiving cavity, which provides a stable installation space for the acquisition plate 134, ensuring that the acquisition plate 134 will not shift due to vibration or collision during battery operation. Simultaneously, the bottom shell 132 is provided with a clearance opening 1321 adapted to the air pressure detection unit 131, with the clearance opening 1321 facing the bottom wall of the mounting groove 1211. The acquisition plate 134 is placed within the receiving cavity, and the air pressure detection unit 131 is exposed through the clearance opening 1321. This design ensures that the air pressure detection unit 131 can directly communicate with the air pressure acquisition hole 1212 on the bottom wall of the mounting groove 1211 of the top cover 121, reducing interference during air pressure transmission. The top cover 133 is placed on top of the bottom cover 132 and is detachably connected to the bottom cover 132, for example by screw fastening or snap-fit ​​connection, so that the top cover 133 can be opened to inspect the acquisition board 134 during maintenance.

[0056] When the single cell 100 is operating normally, when the air pressure inside the accommodating cavity changes, the sealing element 122 will elastically deform accordingly, causing the air pressure inside the air pressure acquisition hole 1212 to change synchronously. The air pressure detection unit 131 of the acquisition module 130 extends from the clearance port 1321 and directly connects to the air pressure acquisition hole 1212 to detect the air pressure change inside the air pressure acquisition hole 1212 in real time and transmit the signal to the acquisition board 134 for processing.

[0057] When the data acquisition module 130 malfunctions and the air pressure detection unit 131 or the data acquisition board 134 needs to be repaired, the operator only needs to open the top cover 133 without disassembling the entire data acquisition module 130. On the one hand, components such as the air pressure detection unit 131 on the data acquisition board 134 can be directly inspected and replaced; on the other hand, since the data acquisition module 130 is still installed in the mounting slot 1211 of the top cover 121, there is no need to readjust the relative position of the data acquisition module 130 and the air pressure acquisition hole 1212, which greatly saves maintenance time.

[0058] In some embodiments, refer to Figures 3 to 6The bottom wall of the mounting groove 1211 is provided with a receiving groove 1213, and the air pressure collection hole 1212 is located on the bottom wall of the receiving groove 1213.

[0059] The acquisition module 135 also includes a sealing sleeve 135, which has an air passage 1351. The sealing sleeve 135 is located in the receiving groove 1213 and abuts against the bottom shell 132. The clearance opening 1321, the air passage 1351, and the air pressure acquisition hole 1212 are connected in sequence.

[0060] In this embodiment, a receiving groove 1213 is added to the bottom wall of the mounting groove 1211, and the air pressure acquisition hole 1212 is located on the bottom wall of the receiving groove 1213. A sealing sleeve 135 is provided inside the receiving groove 1213, and an air passage 1351 is provided on the sealing sleeve 135. The sealing sleeve 135 surrounds the clearance opening 1321 to tightly abut against the bottom shell 132, and at the same time abuts against the bottom wall of the receiving groove 1213. Through this design, the air pressure acquisition hole 1212, the air passage 1351, and the clearance opening 1321 are connected in sequence to form a stable and closed gas channel, reducing the loss and interference of air pressure during transmission, ensuring that the air pressure detection part 131 exposed in the clearance opening 1321 can accurately obtain the real air pressure of the air pressure acquisition hole 1212, and significantly improving the accuracy of detection.

[0061] Furthermore, if the acquisition module 130 malfunctions, staff only need to open the top cover 133 to inspect and replace components such as the air pressure detection unit 131 on the acquisition board 134. Because the sealing sleeve 135 is tightly fitted to the bottom cover 132 and the receiving groove 1213, the structural stability of the gas channel is unaffected during maintenance, eliminating the need to recalibrate the relative positions of the acquisition module 130 and the air pressure acquisition hole 1212, significantly reducing maintenance time.

[0062] In some embodiments, refer to Figure 3 and Figure 4 The acquisition module 130 also includes a sealing ring 136. The sealing ring 136 is located on the side of the bottom shell 132 facing the bottom wall of the mounting groove 1211. The inner diameter of the sealing ring 136 is larger than the outer diameter of the sealing sleeve 135. The sealing ring 136 is arranged around the receiving groove 1213 and abuts against the bottom wall of the mounting groove 1211.

[0063] In this embodiment, a sealing ring 136 is added to the side of the bottom shell 132 facing the bottom wall of the mounting groove 1211. The inner diameter of the sealing ring 136 is specially designed to be larger than the outer diameter of the sealing sleeve 135. Its function is to allow the sealing ring 136 to be arranged around the receiving groove 1213 and to tightly abut against the bottom wall of the mounting groove 1211 during installation.

[0064] The addition of sealing ring 136 further optimizes the sealing performance of the gas channel, reduces gas pressure leakage and interference during transmission, and ensures that the gas pressure detection unit 131 can obtain more accurate internal battery gas pressure data, significantly improving the accuracy and reliability of the detection. Overall, the double sealing design of sealing ring 136 and sealing sleeve 135 effectively prevents the intrusion of external impurities and gases, enhances the stability of the acquisition module 130 under complex operating conditions, reduces the risk of failure caused by gas leakage or impurity interference, and provides a strong guarantee for the long-term stable operation of the acquisition module 130.

[0065] In some embodiments, refer to Figure 5 The acquisition module 130 also includes a wireless transmission unit 137, which is disposed on the acquisition board 134 and electrically connected to the acquisition board 134, and is used to transmit the data information acquired by the acquisition module 130 to an external device.

[0066] The top cover 133 has an opening 1331, which is positioned opposite to the wireless transmission unit 137, and is used to transmit signals emitted by the wireless transmission unit 137.

[0067] In this embodiment, the acquisition module 130 adds a wireless transmission unit 137, which is mounted on the acquisition board 134 and connected to it. Meanwhile, the top shell 133 has an opening 1331, which corresponds to the position of the wireless transmission unit 137, facilitating the transmission of signals emitted by the wireless transmission unit 137. Specifically, on the acquisition board 134, the wireless transmission unit 137 integrates and processes the acquired air pressure data and other possible battery status data (such as temperature, voltage, etc.), and then transmits this data information in the form of wireless signals. The opening 1331 on the top shell 133 provides a transmission channel for the wireless signals, enabling the signals to be transmitted smoothly and received by external devices, such as a battery management system (BMS) or other monitoring devices.

[0068] The wireless transmission unit 137 eliminates the constraints of traditional cable connections, simplifies the data transmission process, and improves the flexibility and efficiency of data transmission. The design of the opening 1331 on the top shell 133 effectively ensures the smooth transmission of wireless signals, reduces signal interference, and ensures that data can be accurately and timely transmitted to external devices.

[0069] In some embodiments, refer to Figure 6 The bottom shell 132 is glued to the bottom wall of the receiving groove 1213. The bottom surface of the bottom shell 132 is provided with a plurality of adhesive-blocking ribs 1322, which are arranged circumferentially on the edge of the bottom shell 132.

[0070] In this embodiment, the bottom shell 132 and the bottom wall of the receiving groove 1213 are connected by adhesive. During assembly, adhesive is applied to the contact surface between the bottom shell 132 and the bottom wall of the receiving groove 1213. As the bottom shell 132 is installed into the receiving groove 1213, the adhesive is evenly distributed between the two. The adhesive-blocking ribs 1322 limit the flow range of the adhesive, preventing excessive diffusion and ensuring that the adhesive is concentrated at the connection between the bottom shell 132 and the receiving groove 1213. The gap between any two adjacent adhesive-blocking ribs 1322 forms an overflow port 1323. When a large amount of adhesive is applied, the excess adhesive will overflow through the overflow port 1323, preventing adhesive accumulation from affecting the assembly accuracy of the bottom shell 132 and the receiving groove 1213, as well as the sealing of the gas passage. When the single cell 100 is working, the bottom shell 132 and the receiving groove 1213 are tightly connected by adhesive, maintaining the stable installation of the acquisition module 130. When the acquisition module 130 needs maintenance, the components on the acquisition board 134 can be inspected by opening the top cover 133. Since the bottom cover 132 and the receiving groove 1213 are firmly connected by glue, the overall structural stability will not be affected by opening the top cover 133, and there is no need to re-process the connection between the bottom cover 132 and the receiving groove 1213.

[0071] The bottom shell 132 and the receiving groove 1213 are connected by adhesive. Compared with other connection methods, this greatly enhances the connection stability between the acquisition module 130 and the battery top cover 121, reduces the loosening of the acquisition module 130 due to vibration or external impact, and ensures the continuous and stable operation of the acquisition module 130. Furthermore, the design of the adhesive-blocking rib 1322 and the adhesive overflow port 1323 effectively controls the distribution of adhesive, avoiding the adverse effects of too much or too little adhesive on assembly, improving assembly accuracy and efficiency, and reducing the product defect rate caused by assembly problems.

[0072] In some embodiments, refer to Figure 1 and Figure 3 The top cover assembly 120 also includes a positive terminal 123 and a negative terminal 124, which are inserted through the top cover 121 and arranged at intervals.

[0073] The acquisition module 130 also includes a first FPC cable 138, which is laid on the side of the top cover 121 facing away from the cavity and electrically connected to the acquisition board 134. One end of the first FPC cable 138 is electrically connected to the positive terminal 123, and the other end of the first FPC cable 138 is electrically connected to the negative terminal 124, for detecting the voltage and / or current of the battery.

[0074] Specifically, the positive terminal 123, which passes through the top cover 121, is electrically connected to the positive tab of the battery cell, and the negative terminal 124 is electrically connected to the negative tab of the battery cell. During battery use, the positive terminal 123 and the negative terminal 124 serve as terminals for current input and output. For example, when the battery is connected to an electrical device (such as a car motor), the positive terminal 123 outputs positive charge, and the negative terminal 124 outputs negative charge, thus forming a current loop, enabling the chemical energy in the battery to be converted into electrical energy to power the electrical device.

[0075] The acquisition board 134 is electrically connected to the positive terminal 123 and the negative terminal 124 via a first FPC cable 138. Specifically, this cable is laid on the side of the top cover 121 facing away from the accommodating cavity. One end of the first FPC cable 138 is electrically connected to the positive terminal 123, and the other end is electrically connected to the negative terminal 124, thereby enabling the detection of battery voltage and / or current. When the single battery cell 100 is in operation, current flows between the positive terminal 123 and the negative terminal 124 during the charging and discharging process. The first FPC cable 138, with its good conductivity, transmits the electrical signals from the positive terminal 123 and the negative terminal 124 to the acquisition board 134. The built-in detection circuit of the acquisition board 134 analyzes these electrical signals to accurately calculate the battery voltage and current values.

[0076] In this embodiment, the acquisition board 134 is electrically connected to the positive terminal 123 and the negative terminal 124 via the first FPC cable 138, enabling the acquisition of battery voltage and current data. Combined with the existing air pressure detection function, it achieves comprehensive monitoring of multiple battery parameters, providing richer and more accurate information for the battery management system, and helping to more accurately assess the battery's health status and performance. Furthermore, the FPC cable is thin, flexible, and can be laid on the surface of the top cover 121, which avoids occupying internal battery space, simplifies the layout of the detection circuit, reduces the complexity of the circuit connection, and reduces detection errors caused by circuit faults.

[0077] In some embodiments, refer to Figure 1 and Figure 3 The first FPC cable 138 is equipped with a temperature detection unit 1381 for detecting the battery temperature; and / or,

[0078] The top cover assembly 120 also includes a first encapsulation ring 125 and a second encapsulation ring 126. One end of the first FPC cable 138 is wound around the positive terminal post 123 and encapsulated by the first encapsulation ring 125, and the other end of the first FPC cable 138 is wound around the negative terminal post 124 and encapsulated by the second encapsulation ring 126.

[0079] In this embodiment, a temperature detection unit 1381 is provided on the first FPC cable 138 to detect the battery temperature, thereby further optimizing the battery status monitoring function of the acquisition module 130. Specifically, the temperature detection unit 1381 on the first FPC cable is in close contact with the battery top cover 121, sensing the battery temperature changes in real time and transmitting the temperature data to the acquisition board 134. The temperature detection unit 1381 can be an NTC resistor, fixed to the first FPC cable 138 with adhesive backing. By adding temperature detection functionality to the existing voltage, current, and air pressure detection, the acquisition module 130 can comprehensively monitor multiple key parameters of the battery, providing more complete and accurate data for the battery management system. This helps operators more accurately assess the battery's health and performance, detect potential faults in advance, and ensure the safe and stable operation of the battery. Furthermore, the temperature detection unit 1381 is integrated on the first FPC cable 138, making full use of the thin and flexible characteristics of the FPC cable. Without taking up extra space inside the battery, a high degree of integration of multiple detection functions is achieved, further simplifying the layout of the detection circuit, reducing the complexity of the circuit connection, reducing detection errors caused by circuit failure, and improving the reliability of the acquisition module 130.

[0080] To optimize the connection between the first FPC cable 138 and the positive and negative terminals 124, a first annular groove can be provided on the side wall of the positive terminal 123. One end of the first FPC cable 138 is wound around the positive terminal 123 along the first annular groove and encapsulated by a first encapsulation ring 125 formed by injection molding. Similarly, a second annular groove can be provided on the side wall of the negative terminal 124. The other end of the first FPC cable 138 is wound around the negative terminal 124 along the second annular groove and encapsulated by a second encapsulation ring 126 formed by injection molding. Specifically, in the assembly process, one end of the first FPC cable 138 is first wound around the first annular groove on the side wall of the positive terminal 123, and the other end is wound around the second annular groove on the side wall of the negative terminal 124. Subsequently, through injection molding, a first encapsulation ring 125 and a second encapsulation ring 126 are formed at the surrounding FPC cable. These two encapsulation rings tightly wrap the connection between the FPC cable and the terminal, ensuring the stability and sealing of the connection. The winding arrangement of the first FPC cable 138 with the positive terminal 123 and the negative terminal 124 increases the contact area between the first FPC cable 138 and the positive and negative terminals 124. Simultaneously, the injection molding of the first encapsulation ring 125 and the second encapsulation ring 126 effectively prevents loosening or displacement between the FPC cable and the terminals, greatly enhancing connection stability and ensuring the reliability of electrical signal transmission during long-term battery use, reducing detection errors caused by poor connections. Furthermore, the injection-molded first and second encapsulation rings 125 and 126 not only achieve a stable connection between the FPC cable and the terminals but also provide excellent sealing and protection for the connection points. This effectively prevents moisture, dust, and other impurities from entering the connection points, avoiding malfunctions caused by corrosion or short circuits, and extending the service life of the acquisition module 130 and the battery.

[0081] In some embodiments, refer to Figure 1 , Figure 2 and Figure 4 The acquisition module 130 also includes a second FPC cable 139. The second FPC cable 139 extends from the side of the top cover 121 away from the cavity to the side of the housing 110 and is electrically connected to the acquisition board 134. The second FPC cable 139 is provided with a strain detection part 1391 to detect the strain generated when the battery is deformed.

[0082] To further enhance the comprehensive monitoring of battery status by the acquisition module 130, the acquisition board 134 is electrically connected to a second FPC cable 139. The second FPC cable 139 starts from the side of the top cover 121 facing away from the accommodating cavity and extends to the side of the housing 110. Simultaneously, the second FPC cable 139 is equipped with a strain detection unit 1391, which is used to detect the strain generated when the battery deforms. The strain detection unit 1391 can be a strain sensor. During actual battery use, the battery housing 110 may deform due to factors such as thermal expansion and contraction during charging and discharging, and external pressure. When the battery deforms, the strain on the side of the housing 110 is transmitted to the second FPC cable 139 attached to the side. The strain detection unit 1391 on the second FPC cable 139 senses this strain change in real time and converts the strain data into an electrical signal, which is then transmitted to the acquisition board 134.

[0083] The second FPC cable 139 extends from the side of the top cover 121 away from the accommodating cavity to the side of the housing 110, making full use of the external space of the battery and avoiding the occupation of the limited internal space. Meanwhile, the thin and flexible nature of the FPC cable allows for a more flexible and rational layout of the detection circuitry, reducing the complexity of the wiring connections, minimizing detection errors caused by wiring faults, and improving the reliability of the acquisition module 130. Furthermore, by setting a strain detection unit 1391 on the second FPC cable 139, the acquisition module 130 adds the function of monitoring battery deformation strain. Combined with the existing voltage, current, temperature, and air pressure detection functions, it achieves comprehensive monitoring of the battery status. This provides richer and more accurate data support for the battery management system, helping to more accurately assess the battery's health status, promptly detect potential safety hazards such as battery bulging, and thus ensure the safe and stable operation of the battery.

[0084] This utility model embodiment also proposes a battery pack, the battery pack comprising:

[0085] Box;

[0086] The battery management system is located within the enclosure;

[0087] Multiple individual battery cells 100 as described in the foregoing embodiments are housed inside the casing, and the acquisition module 130 of all individual battery cells 100 is communicatively connected to the battery management system.

[0088] The specific structure of the single battery cell 100 is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments.

[0089] In the battery pack of this embodiment, the individual battery cells 100 are connected by an efficient electrical connection to achieve power transfer. Simultaneously, an advanced thermal management system is employed to ensure the battery pack maintains a stable temperature during operation, thereby improving its performance and safety. By combining multiple individual battery cells 100 of this invention into a battery pack, the advantages of each individual battery cell 100 in terms of accurate air pressure detection and ease of maintenance can be fully utilized, enhancing the overall performance of the battery pack and meeting the needs of different application scenarios.

[0090] 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 single cell (100) characterized by, include: A housing (110) having a receiving cavity; The battery cell is disposed in the accommodating cavity; A top cover assembly (120) includes a top cover (121) and a sealing element (122). The top cover (121) covers the housing (110) and closes the accommodating cavity. The top cover (121) has a mounting groove (1211) on the side facing away from the accommodating cavity. The bottom wall of the mounting groove (1211) has a pressure collection hole (1212) that penetrates the top cover (121). The sealing element (122) is located on the side of the top cover (121) facing the accommodating cavity. The sealing element (122) covers the end opening of the pressure collection hole (1212) facing the accommodating cavity and can deform according to the pressure change in the accommodating cavity. A data acquisition module (130) is housed in the mounting groove (1211) and closes the other end of the air pressure acquisition hole (1212) facing away from the accommodating cavity. The data acquisition module (130) includes an air pressure detection unit (131) for detecting the air pressure of the air pressure acquisition hole (1212).

2. The single-cell battery (100) according to claim 1, characterized in that, The acquisition module (130) also includes a bottom shell (132), a top shell (133), and an acquisition plate (134), and the air pressure detection unit (131) is connected to the acquisition plate (134); The bottom shell (132) has a receiving cavity and a relief opening (1321) adapted to the air pressure detection unit (131). The acquisition plate (134) is housed in the receiving cavity, and the air pressure detection unit (131) is exposed from the relief opening (1321). The top shell (133) covers the bottom shell (132) and is detachably connected to the bottom shell (132).

3. The single-cell battery (100) according to claim 2, characterized in that, The bottom wall of the mounting groove (1211) is provided with a receiving groove (1213), and the air pressure collection hole (1212) penetrates the bottom wall of the receiving groove (1213); The acquisition module (130) also includes a sealing sleeve (135), which has an air passage (1351). The sealing sleeve (135) is located in the receiving groove (1213) and abuts against the bottom shell (132). The clearance opening (1321), the air passage (1351), and the air pressure acquisition hole (1212) are connected in sequence.

4. The single-cell battery (100) according to claim 3, characterized in that, The acquisition module (130) also includes a sealing ring (136), which is disposed on the bottom wall of the bottom shell (132) facing the mounting groove (1211). The inner diameter of the sealing ring (136) is larger than the outer diameter of the sealing sleeve (135). The sealing ring (136) is disposed around the receiving groove (1213) and abuts against the bottom wall of the mounting groove (1211).

5. The single-cell battery (100) according to claim 2, characterized in that, The acquisition module (130) further includes a wireless transmission unit (137), which is disposed on the acquisition board (134) and electrically connected to the acquisition board (134), and is used to transmit the data information acquired by the acquisition module (130) to an external device; The top shell (133) is provided with an opening (1331), which is positioned opposite to the wireless transmission unit (137) and is used to transmit signals emitted by the wireless transmission unit (137).

6. The single-cell battery (100) according to claim 3, characterized in that, The bottom shell (132) is glued to the bottom wall of the receiving groove (1213). The bottom surface of the bottom shell (132) is provided with a plurality of adhesive-blocking ribs (1322), and the plurality of adhesive-blocking ribs (1322) are arranged circumferentially on the edge of the bottom shell (132).

7. The single-cell battery (100) according to claim 2, characterized in that, The top cover assembly (120) further includes a positive terminal (123) and a negative terminal (124), which are inserted through the top cover (121) and arranged at intervals. The acquisition module (130) further includes a first FPC cable (138), which is laid on the side of the top cover (121) facing away from the accommodating cavity and electrically connected to the acquisition board (134). One end of the first FPC cable (138) is electrically connected to the positive terminal (123), and the other end of the first FPC cable (138) is electrically connected to the negative terminal (124) to detect the voltage and / or current of the battery.

8. The single-cell battery (100) according to claim 7, characterized in that, The first FPC cable (138) is provided with a temperature detection unit (1381) for detecting the temperature of the battery; and / or, The top cover assembly (120) further includes a first encapsulation ring (125) and a second encapsulation ring (126). One end of the first FPC cable (138) is wound around the positive terminal post (123) and encapsulated by the first encapsulation ring (125). The other end of the first FPC cable (138) is wound around the negative terminal post (124) and encapsulated by the second encapsulation ring (126).

9. The single-cell battery (100) according to claim 2, characterized in that, The acquisition module (130) also includes a second FPC cable (139), which extends from the side of the top cover (121) away from the cavity to the side of the housing (110) and is electrically connected to the acquisition board (134). The second FPC cable (139) is provided with a strain detection part (1391) to detect the strain generated when the battery deforms.

10. A battery pack, characterized in that, include: Box; The battery management system is located in the enclosure; Multiple individual battery cells (100) as described in any one of claims 1 to 9 are disposed in the housing, and the acquisition module (130) of all the individual battery cells (100) is communicatively connected to the battery management system.

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