Soft package battery

Abstract

The utility model discloses a soft package battery which comprises a battery cell, and the battery cell comprises a positive pole lug and a negative pole lug; the aluminum-plastic film is used for packaging the battery cell, at least one side edge of the aluminum-plastic film is provided with an edge voltage test tab, and the voltage test tab, the positive tab and the negative tab are located on the same side; the battery monitoring circuit board is used for monitoring the temperature and electric quantity information of the battery cell, and the battery monitoring circuit board is electrically connected with the side voltage test tab; thus, the battery monitoring circuit board can collect edge voltage data, continuous monitoring of the packaging integrity and the sealing performance of the battery cell is achieved, and the possible damage or liquid leakage risk is warned in advance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a soft-pack battery. Background Art

[0002] Edge voltage testing is an important method for assessing the integrity and sealing of battery packaging. It can promptly detect voltage anomalies at the edge of the battery package and prevent potential safety hazards such as leakage and short circuits (for example, whether the tabs are shorting with the aluminum-plastic film encapsulating the battery cell). Therefore, performing edge voltage testing on batteries is of great significance for ensuring their safety and reliability.

[0003] Currently, edge voltage testing is primarily performed during battery manufacturing. Common methods include piercing the top seal and contacting the aluminum layer at the edge of the top seal with a probe. Piercing the top seal involves penetrating the seal with a bayonet to obtain a voltage signal; contacting the probe with the aluminum layer of the seal to measure the voltage change. These methods can, to a certain extent, reveal the state of the battery packaging and detect defects during the manufacturing process.

[0004] However, existing technologies have significant shortcomings. These methods are limited to the manufacturing phase and cannot monitor the battery cell's edge voltage changes at different stages of its lifespan. They cannot provide early warning of the risk of cell damage and leakage, limiting safety monitoring throughout the battery lifecycle. Utility Model Content

[0005] The main purpose of the utility model is to provide a soft-pack battery, aiming to solve the problem of being unable to monitor the side voltage changes of the battery cell at different service life stages.

[0006] To achieve the above objectives, the present invention provides a soft-pack battery, which includes:

[0007] A battery cell, comprising a positive electrode tab and a negative electrode tab;

[0008] An aluminum-plastic film is used to encapsulate the battery cell, wherein at least one side of the aluminum-plastic film is configured with a side voltage test tab, and the side voltage test tab is located on the same side as the positive electrode tab and the negative electrode tab;

[0009] A battery monitoring circuit board is used to monitor the temperature and power information of the battery cell, and the battery monitoring circuit board is electrically connected to the side voltage test tab.

[0010] In some embodiments, the battery monitoring circuit board includes a side voltage acquisition circuit, which is electrically connected to the side voltage test tab and is used to collect the side voltage value of the battery cell.

[0011] In some embodiments, the aluminum-plastic film includes a first side and a second side that are opposite, the first side is configured with a first protruding extension section, and the second side is configured with a second protruding extension section. After the aluminum-plastic film encapsulates the battery cell, the first extension section and the second extension section at least partially overlap to form an edge voltage test tab.

[0012] In some embodiments, the length of the first extension segment and the second extension segment is 2 mm to 4 mm, and the width is 2 mm to 6 mm.

[0013] In some embodiments, the edge voltage test tab is located between the positive electrode tab and the negative electrode tab;

[0014] Alternatively, the side voltage test tab is located outside the positive electrode tab or the negative electrode tab.

[0015] In some embodiments, the soft-pack battery further includes tab glue, the positive tab and the negative tab are both sleeved with the tab glue, and the tab glue is located between the first side and the second side.

[0016] In some embodiments, the aluminum-plastic film includes a first half film and a second half film, the inner surface of the first half film is configured with a first pit, and the inner surface of the second half film is configured with a second pit, and the first pit and the second pit are buckled together to form a accommodating cavity for accommodating the battery cell.

[0017] In the technical solution of this embodiment, a side voltage test tab is constructed on at least one side of the aluminum-plastic film, and is located on the same side as the positive and negative tabs, and the battery monitoring circuit board is electrically connected to the side voltage test tab. This enables the battery monitoring circuit board to collect side voltage data, achieve continuous monitoring of the integrity and sealing of the battery cell packaging, and provide early warning of possible damage or leakage risks. At the same time, the battery monitoring circuit board can also monitor the temperature and power information of the battery cell, providing more safety parameters. By real-time monitoring of the side voltage throughout the battery's life cycle, potential risks such as aluminum-plastic film corrosion and leakage can be discovered in a timely manner, preventing the occurrence of safety accidents and improving the safety and reliability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural block diagram of a soft-pack battery in one embodiment of the present invention;

[0019] Figure 2 This is a schematic structural diagram of an aluminum-plastic film in one embodiment of the present invention;

[0020] Figure 3 This is a structural block diagram of a battery cell in one embodiment of the present invention.

[0021] Description of Figure Numbers:

[0022] 10. Soft-pack battery; 100. Battery cell; 102. Positive electrode tab; 104. Negative electrode tab; 200. Aluminum-plastic film; 201. First side; 202. Second side; 201a. First extension section; 202a. Second extension section; 201b. First half film; 201c. First pit; 202b. Second half film; 202c. Second pit; F. Axis; 203. Side voltage test tab; 300. Tab glue; 400. Battery monitoring circuit board; 401. Side voltage acquisition circuit.

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described 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 creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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.

[0026] 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.

[0027] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. 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 this utility model.

[0028] If the PP layer (polypropylene layer) in the aluminum-plastic film of the battery cell's outer packaging has large-scale damage or electron channels, the aluminum layer in the film will react with the electrolyte, creating a potential difference. This can cause the aluminum layer to be corroded by the electrolyte, posing a safety risk of battery cell corrosion and leakage. The risk of corrosion and leakage is determined by measuring the potential difference between the battery cell's positive electrode and the aluminum-plastic film, which is called the edge voltage test.

[0029] Specifically, when the PP layer (polypropylene layer) in the aluminum-plastic film is extensively damaged or an electron channel forms, the PP layer, which is supposed to provide insulation and isolation, loses its function. At this point, the aluminum layer in the aluminum-plastic film is directly exposed to the electrolyte. Aluminum is a reactive metal that readily undergoes electrochemical reactions with components in the electrolyte. When the aluminum layer comes into contact with the electrolyte, a new electrochemical reaction interface is formed. The aluminum layer acts as the anode, undergoing an oxidation reaction and releasing electrons, while the ions in the electrolyte undergo a reduction reaction at the cathode. This electrochemical reaction creates a significant potential difference between the aluminum layer and the positive or negative electrode of the battery cell. The uncorroded aluminum layer, isolated by the PP layer, produces a voltage value close to zero or very low when measured.

[0030] Therefore, by measuring the voltage between the positive electrode and the aluminum layer of the battery cell through the edge voltage test, it is possible to determine whether the PP layer is damaged and whether the aluminum layer is corroded. If the voltage value is abnormally high, it means that the aluminum layer has reacted with the electrolyte, and there is a risk of corrosion and leakage. It is necessary to take timely measures to ensure the safety of the battery. For details, please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 This is a schematic structural diagram of the aluminum-plastic film in one embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of a soft-pack battery in one embodiment of the present invention. Figure 3 This is a structural block diagram of an electrical device in one embodiment of the present invention.

[0031] The present invention provides a soft-pack battery, which includes:

[0032] A battery cell 100 , comprising a positive electrode tab 102 and a negative electrode tab 104 ;

[0033] The aluminum-plastic film 200 is used to encapsulate the battery cell 100. At least one side of the aluminum-plastic film 200 is configured with a side voltage test tab 203. The side voltage test tab 203 is located on the same side as the positive tab 102 and the negative tab 104.

[0034] The battery monitoring circuit board 400 is used to monitor the temperature and power information of the battery cell. The battery monitoring circuit board 400 is electrically connected to the side voltage test tab 203.

[0035] In this embodiment, the battery cell 100, serving as the core energy storage and conversion component, typically consists of a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte. The positive electrode tab 102 can be made of aluminum or an aluminum alloy, offering excellent conductivity and corrosion resistance. The negative electrode tab 104 can be made of nickel or nickel-plated copper, ensuring excellent conductivity and mechanical strength.

[0036] The aluminum-plastic film 200 is used to encapsulate the battery cell 100, and at least one side of the film is configured with a side voltage testing tab 203. During the packaging process, the aluminum-plastic film 200 is designed so that the side voltage testing tab 203 extends from the same side as the positive electrode tab 102 and the negative electrode tab 104. The aluminum-plastic film 200 can be formed by combining aluminum foil with multiple layers of polymer film to provide the necessary mechanical protection and sealing properties. By configuring the side voltage testing tab 203 on the side of the aluminum-plastic film 200, the side voltage can be conveniently tested, avoiding the problems of puncturing the sealed edge or poor contact in traditional methods.

[0037] The battery monitoring circuit board 400 is electrically connected to the side voltage test tab 203. Exemplarily, the main controller on the battery monitoring circuit board 400 can be configured to feed back the side voltage value of the battery cell 100 to the side voltage detection device in real time, or to regularly collect the side voltage value of the battery cell 100. When it is detected that the side voltage exceeds a preset safety threshold, the battery monitoring circuit board 400 can trigger an alarm or take protective measures to warn of the possible risk of damage or leakage of the battery cell 100. Among them, the battery monitoring circuit board 400 is electrically connected to the side voltage test tab 203 and can be configured to have two working modes in different use stages.

[0038] It should be noted that the battery monitoring circuit board 400 in this embodiment can have multiple acquisition ports. For example, the first port can be electrically connected to the positive electrode tab 102 and the negative electrode tab 104 to detect power information, and the second port can be electrically connected to the edge voltage test tab 203 to collect the edge voltage value. The third port can be connected to a temperature sensor, with one end of the temperature sensor electrically connected to the outer surface of the soft-pack battery and the other end electrically connected to the second port. In this way, the battery monitoring circuit board 400 can monitor the battery temperature.

[0039] During the production testing phase, the battery monitoring circuit board 400 is configured to provide real-time feedback of the battery cell 100's edge voltage to the edge voltage detection device (primarily executed by a main controller mounted on the battery monitoring circuit board 400). This real-time monitoring allows for the timely detection of potential defects in the packaging process, such as damage to the aluminum-plastic film 200 or electrolyte leakage, ensuring the quality of shipped products.

[0040] Specifically, one acquisition terminal of the battery monitoring circuit board 400 is connected to the edge voltage test tab 203, and the other acquisition terminal is connected to the positive electrode tab 102. This connection method enables the battery monitoring circuit board 400 to measure the potential difference between the edge of the aluminum-plastic film 200 and the positive electrode of the battery cell 100, that is, the edge voltage value.

[0041] The battery monitoring circuit board 400 measures the edge voltage value in real time and can choose to directly send the raw data, or perform preliminary processing such as filtering or amplification, and then feed the data back to the voltage detection device.

[0042] After receiving the edge voltage data, the voltage detection device's built-in software analyzes and processes the data, generating intuitive test charts or curves. Workers can view these charts on the display screen to quickly assess the integrity and sealing of the battery pack. The voltage detection device also compares the measured edge voltage value with a preset threshold to automatically determine the battery's quality status. If the edge voltage value is within the normal range, the system displays "Pass." If it exceeds the normal range, the system displays "Fail," indicating that further inspection or rework is required.

[0043] When the battery is put into actual use, the battery monitoring circuit board 400 can switch to a periodic data acquisition mode to regularly collect the side voltage values ​​of the battery cells 100. By monitoring the changes in the side voltage over a long period of time, it is possible to provide early warning of possible damage or leakage risks of the battery cells 100, thereby improving the safety and reliability of the battery during use.

[0044] After the production test is completed and the battery is confirmed to be qualified, the technician can manually adjust the mode selection switch on the battery monitoring circuit board 400 or set it through software to switch the working mode to the periodic collection mode.

[0045] The battery monitoring circuit board 400 has a built-in logic control circuit or program. When it detects that the battery has completed its initial charge and discharge cycle or meets specific conditions (such as the power-on time reaches a set value), it automatically switches from real-time feedback mode to periodic collection mode.

[0046] The battery monitoring circuit board 400 collects the side voltage value at a preset time interval (for example, hourly, daily, or weekly). The collected side voltage value can be preliminarily processed within the module, such as filtering, denoising, or averaging, to improve the accuracy and reliability of the data. The processed data can be stored in a built-in memory or transmitted to the main control unit of the power-consuming device. It should be noted that in this embodiment, the power-consuming device can be a mobile phone, laptop computer, tablet computer, smart watch, or other electronic device that requires battery power.

[0047] If the collected edge voltage exceeds a preset safety threshold, the battery monitoring circuit board 400 immediately sends an alarm signal to the main control unit. The main control unit can then adjust the battery's charge and discharge current to prevent overuse and reduce risk. The device's display, indicator lights, or sound prompts notify the user of battery anomalies requiring repair or replacement. Abnormal events can also be recorded in the device log for subsequent analysis and maintenance.

[0048] Thus, by regularly collecting data during use, the battery monitoring circuit board 400 can continuously monitor changes in the edge voltage of the battery cell 100, promptly identifying potential risks such as package damage, corrosion or leakage of the aluminum-plastic film 200. This provides early warning, prevents safety accidents, extends the service life of the battery and electrical devices, and improves user experience and device reliability.

[0049] In the technical solution of this embodiment, by constructing a side voltage test tab 203 on at least one side of the aluminum-plastic film 200 and locating it on the same side as the positive electrode tab 102 and the negative electrode tab 104, the battery monitoring circuit board 400 is electrically connected to the side voltage test tab 203, which can obtain side voltage data in real time, continuously monitor the package integrity and sealing of the battery cell 100, and provide early warning of possible damage or leakage risks. At the same time, the battery monitoring circuit board 400 can also monitor the temperature and power information of the battery cell 100, providing more safety parameters. In this way, by real-time monitoring of the side voltage throughout the battery life cycle, it is possible to timely warn of potential risks such as aluminum-plastic film corrosion and leakage, thereby preventing the occurrence of safety accidents.

[0050] Continue reading Figure 1 In this embodiment, the battery monitoring circuit board 400 includes a side voltage acquisition circuit 401, which is electrically connected to the side voltage test tab 203 for collecting the side voltage value of the battery cell.

[0051] In this embodiment, the side voltage acquisition circuit 401 is responsible for acquiring the voltage signal from the side voltage test tab 203 and transmitting it to the main controller (which can be integrated into the battery monitoring circuit board 400). The main controller has a built-in voltage monitoring algorithm that can analyze the collected side voltage data in real time and feed it back to the side voltage detection device. When the battery is in the production test phase, the main controller can be set to real-time feedback mode to continuously monitor the side voltage value and promptly detect packaging defects or potential safety hazards.

[0052] Once the battery is in use, the main controller can switch the edge voltage detection mode to a periodic data collection mode. At preset intervals, the main controller instructs the edge voltage collection circuit to collect and record edge voltage values. By continuously monitoring edge voltage changes, the main controller can provide timely warnings of potential damage or leakage risks to the battery cell 100.

[0053] See Figure 2 In this embodiment, the aluminum-plastic film 200 includes a first side 201 and a second side 202 opposite to each other. The first side 201 is configured with a protruding first extension section 201a, and the second side 202 is configured with a protruding second extension section 202a. After the aluminum-plastic film 200 encapsulates the battery cell 100, the first extension section 201a and the second extension section 202a at least partially overlap to form a side voltage test tab 203. The positive electrode tab 102 and the negative electrode tab 104 extend from between the first side 201 and the second side 202.

[0054] In this embodiment, the first extension section 201a and the second extension section 202a can be formed by repeatedly cutting the first side 201 and the second side 202 of the aluminum-plastic film 200 using an L-shaped knife and a straight knife to form the outwardly extending portion. After the aluminum-plastic film 200 is folded to encapsulate the battery cell 100, the first extension section 201a and the second extension section 202a overlap to form the side voltage test tab 203. Of course, after the aluminum-plastic film 200 is folded to encapsulate the battery cell 100, it is also possible to directly form the side voltage test tab 203 by repeatedly cutting the aluminum-plastic film 200 using an L-shaped knife and a straight knife. It should be noted that in addition to using the L-shaped knife and the straight knife in this embodiment, laser cutting can also be used, and this is not particularly limited here.

[0055] In some embodiments, the first extension section 201a is integrally formed with the aluminum-plastic film 200;

[0056] And / or, the second extension section 202 a and the aluminum-plastic film 200 are integrally formed.

[0057] In this embodiment, the first extension section 201a and the second extension section 202a can be formed simultaneously during the manufacturing process of the aluminum-plastic film 200, without the need for subsequent bonding or welding. This one-piece design eliminates any interface or gap between the extension section and the aluminum-plastic film 200, ensuring the integrity and sealing of the package.

[0058] This one-piece design can enhance the stability and mechanical strength of the structure. Since the extension section is integrated with the aluminum-plastic film 200, the risk of falling off or damage caused by weak bonding or welding defects is avoided, thereby improving the reliability of the battery package.

[0059] Secondly, one-piece molding can reduce additional processing steps, simplify the manufacturing process, and reduce production costs. At the same time, it can maintain consistency in size and performance during mass production, improving product quality.

[0060] In this embodiment, the first extension section 201 a and / or the second extension section 202 a are integrally formed with the aluminum-plastic film 200 , which not only improves the structural strength and sealing performance of the soft-pack battery 10 , but also simplifies the production process.

[0061] In some embodiments, the width of the first extension section 201 a and the second extension section 202 a is smaller than the width of the aluminum-plastic film 200 .

[0062] Specifically, the first extension section 201a and the second extension section 202a are narrowed in the width direction of the aluminum-plastic film 200 to avoid the position of the positive electrode tab 102 and the negative electrode tab 104. In this way, when the aluminum-plastic film 200 is folded to encapsulate the battery cell 100, the formed side voltage test tab 203 will be located outside or between the positive and negative tabs, avoiding direct contact with the positive electrode tab 102 and the negative electrode tab 104, thereby preventing the occurrence of a short circuit.

[0063] In this embodiment, by designing the widths of the first extension section 201a and the second extension section 202a to be smaller than the overall width of the aluminum-plastic film 200, sufficient space is ensured between the side voltage test tab 203 and the positive and negative tabs. This design effectively prevents accidental contact between the side voltage test tab 203 and the positive and negative tabs during packaging and subsequent use, thereby improving battery safety.

[0064] Specifically, the lengths of the first extension section 201a and the second extension section 202a can be set to 2 mm to 4 mm, and the widths of the first extension section 201a and the second extension section 202a can be set to 2 mm to 6 mm.

[0065] In this embodiment, the extension section with a length of 2 mm to 4 mm can provide sufficient length for forming the side voltage test tab 203 without increasing the battery package size. This length not only facilitates connection with test equipment or monitoring circuits, but also does not interfere with other components of the battery, ensuring the compactness and integrity of the battery.

[0066] Secondly, the 2mm to 6mm width design provides sufficient contact area for the extension. This helps improve the stability and reliability of the connection between the edge voltage test tab 203 and external devices, avoiding poor contact caused by too small a contact area. At the same time, the appropriate width also allows the extension to avoid the position of the positive and negative tabs 102 and 104, preventing direct contact with them during packaging and use, thereby reducing the risk of short circuits.

[0067] In this embodiment, the appropriate dimensions ensure that the edge voltage test tab 203 has sufficient contact area and mechanical strength, ensuring a reliable connection with the test equipment or monitoring circuit, and improving the accuracy and stability of the edge voltage test. At the same time, the positive and negative tabs are positioned away from each other, preventing direct contact between the extension section and the tabs, eliminating the potential short circuit risk.

[0068] Furthermore, the positive electrode tab 102, the negative electrode tab 104, and the side voltage detection tab are arranged at intervals.

[0069] In this embodiment, the positive electrode tab 102, the negative electrode tab 104 and the side voltage detection tab are spaced apart and kept at a certain distance from each other. Specifically, these tabs are arranged in an orderly manner along the edge of the aluminum-plastic film 200, but are staggered in position to avoid direct contact.

[0070] In this embodiment, by spatially separating the positive electrode tab 102, the negative electrode tab 104 and the side voltage detection tab, accidental contact between different tabs is prevented, the possibility of short circuit is reduced, and the safety of the battery is further improved.

[0071] The spacing also helps reduce electromagnetic interference between tabs, ensuring accurate transmission of electrical signals and improving the reliability of edge voltage detection. Furthermore, during production and testing, the spacing makes each tab easier to identify and access, simplifying the assembly and testing process and improving work efficiency.

[0072] Continue reading Figure 3 In this embodiment, the side voltage test tab 203 is located between the positive electrode tab 102 and the negative electrode tab 104;

[0073] Alternatively, the side voltage testing tab 203 is located outside the positive electrode tab 102 or the negative electrode tab 104 .

[0074] In this embodiment, there are at least two specific arrangements of the edge voltage test tabs 203, for example:

[0075] In the first arrangement, the side voltage test tab 203 is located between the positive tab 102 and the negative tab 104. In this design, the side voltage test tab 203 is placed in the middle of the positive and negative tabs, and a certain distance is maintained between them. The advantage of this layout is that it fully utilizes the edge space of the aluminum-plastic film 200, so that the tabs are arranged in an orderly manner, which is convenient for packaging and connection. At the same time, the side voltage test tab 203 is located between the positive and negative tabs, which can avoid both in a balanced manner, reduce electromagnetic interference, and improve the accuracy of the test.

[0076] In the second arrangement, the side voltage test tab 203 is located on the outside of the positive tab 102 and the negative tab 104. Specifically, with the positive tab 102 and the negative tab 104 as the center, the side voltage test tab 203 is located on one side of the two (for example, on the left or right side of the two), and maintains a certain distance from the adjacent tabs. The advantage of this layout is that the side voltage test tab 203 is away from other main tabs, further reducing the risk of short circuit due to accidental contact. At the same time, this design makes the side voltage test tab 203 easier to identify and connect, which is convenient for operation during production and testing.

[0077] Continue reading Figure 3 In this embodiment, in order to further enhance the insulation between the positive electrode tab 102, the negative electrode tab 104 and the aluminum-plastic film 200, in this embodiment, the soft-pack battery 10 further includes a tab glue 300, and the positive electrode tab 102 and the negative electrode tab 104 are both sleeved with the tab glue 300, and the tab glue is located between the first side 201 and the second side 202.

[0078] In this embodiment, the primary function of the tab glue 300 is to prevent direct contact between the positive and negative tabs 102, 104 and the aluminum-plastic film. Although the aluminum-plastic film 200 already has an insulating layer on one side used to encapsulate the battery cell 100, applying the tab glue 300 to the outside of the tabs further enhances the insulation and prevents electrical contact or leakage risks that may occur during packaging and use.

[0079] Thus, the tab glue 300 provides an additional insulating layer for the positive and negative tabs 102 and 104, preventing them from coming into direct contact with the aluminum-plastic film 200 or other conductive components, thereby improving the safety of the battery. Furthermore, the tab glue 300 prevents the tabs from moving or rubbing during the packaging process, which could damage the aluminum-plastic film and enhance the structural stability and durability of the battery.

[0080] Continue reading Figure 2 In this embodiment, the aluminum-plastic film 200 includes a first half film 201b and a second half film 202b. The first half film 201b is configured with a first pit 201c, and the second half film 202b is configured with a second pit 202c. The first pit 201c and the second pit 202c are symmetrically arranged about at least one axis F of the aluminum-plastic film.

[0081] The first half film 201 b of the aluminum-plastic film 200 is folded toward the second half film 202 b , and the first recess 201 c and the second recess 202 c are buckled together to form a receiving cavity for receiving the battery cell 100 .

[0082] In this embodiment, the first recess 201c and the second recess 202c can be formed by punching. Of course, in some embodiments, they can also be formed by hot pressing, which is not particularly limited here. When packaging the battery cell 100, the battery cell 100 can be first placed in the first recess 201c or the second recess 202c, and then the aluminum-plastic film 200 can be folded so that the first recess 201c and the second recess 202c are engaged to form a receiving cavity. The battery cell 100 is then firmly fixed in the receiving cavity, which can prevent the battery cell 100 from moving or shaking in the folded aluminum-plastic film 200, thereby improving the structural stability of the battery.

[0083] In addition, the symmetrically arranged pits make the material utilization rate of the aluminum-plastic film 200 higher, and the overall thickness of the packaged battery is smaller, which is conducive to the lightweight and miniaturized design of the battery and meets the battery size requirements of modern electronic devices.

[0084] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A soft pack battery, characterized in that: include: A battery cell, comprising a positive electrode tab and a negative electrode tab; An aluminum-plastic film is used to encapsulate the battery cell, wherein at least one side of the aluminum-plastic film is configured with a side voltage test tab, and the side voltage test tab is located on the same side as the positive electrode tab and the negative electrode tab; A battery monitoring circuit board is used to monitor the temperature and power information of the battery cell, and the battery monitoring circuit board is electrically connected to the side voltage test tab.

2. The soft pack battery according to claim 1, characterized in that: The battery monitoring circuit board includes a side voltage acquisition circuit, which is electrically connected to the side voltage test tab and is used to collect the side voltage value of the battery cell.

3. The soft pack battery according to claim 1, characterized in that The aluminum-plastic film includes a first side and a second side that are opposite to each other. The first side is configured with a first protruding extension section, and the second side is configured with a second protruding extension section. After the aluminum-plastic film encapsulates the battery cell, the first extension section and the second extension section at least partially overlap to form an edge voltage test tab.

4. The soft pack battery according to claim 3, characterized in that: The length of the first extension section and the second extension section is 2 mm to 4 mm, and the width is 2 mm to 6 mm.

5. The soft pack battery according to claim 4, characterized in that: The side voltage test tab is located between the positive electrode tab and the negative electrode tab; or The side voltage testing tab is located outside the positive electrode tab or the negative electrode tab.

6. The soft pack battery according to claim 5, characterized in that: The soft-pack battery further includes tab glue, and both the positive tab and the negative tab are sleeved with the tab glue, and the tab glue is located between the first side and the second side.

7. The soft pack battery according to claim 6, characterized in that: The aluminum-plastic film includes a first half film and a second half film. The inner surface of the first half film is configured with a first pit, and the inner surface of the second half film is configured with a second pit. The first pit and the second pit are buckled together to form a receiving cavity for receiving the battery cell.

Images