Portable replaceable battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a portable replaceable battery. The portable replaceable battery comprises a battery cell assembly, a PCM protection plate and a golden finger, a supporting part is formed at the end of the battery cell assembly, the supporting part is used for supporting the PCM protection plate, the PCM protection plate is provided with a wiring end, the wiring end is used for being connected with a tab group of the battery cell assembly, and the golden finger is installed on the PCM protection plate. And an output terminal is arranged to be electrically connected with external electric equipment. By forming the supporting part on the battery cell assembly, the battery cell assembly can directly support the PCM protection plate through the supporting part, so that the assembly of the battery cell assembly and the PCM protection plate can be realized without introducing structures such as a plastic bracket and related processes, the process procedures and the use of auxiliary materials are reduced, and the production efficiency is improved. According to the portable replaceable battery, the PACK cost and the repair cost are greatly reduced, the overall structure of the portable replaceable battery is simplified, meanwhile, the production efficiency can be effectively improved, and the requirement for mass production is met.

Description

Technical Field

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

[0002] The EU's new Battery Law requires that portable replaceable batteries be removable and replaceable for end users. With the passage of the new Battery Law, low-cost replaceable batteries will inevitably be the future development trend in the battery pack industry.

[0003] Currently, all existing portable replaceable battery pack solutions require the use of plastic brackets to fix the battery cells, PCM, and gold fingers. The addition of these plastic brackets often increases the number of steps involved in the packing process, such as fixing and injection molding, resulting in higher labor and material costs and thus higher packing costs. Furthermore, this packing method leads to extremely low production efficiency, making automation and mass production difficult, and thus unable to meet future high demand.

[0004] Therefore, there is a need to design a portable, replaceable battery that is simpler to construct and more efficient to produce, in order to solve the problems existing in the current technology. Utility Model Content

[0005] The purpose of this invention is to provide a portable replaceable battery that simplifies the overall structure, reduces the number of production steps, time, and auxiliary material consumption, lowers costs, and effectively improves production efficiency to meet the needs of mass production.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A portable replaceable battery includes: a cell assembly, a PCM protection board, and gold fingers. The end of the cell assembly forms a support portion for supporting the PCM protection board. The PCM protection board is provided with terminals for connecting to the tabs of the cell assembly. The gold fingers are mounted on the PCM protection board and are configured as output terminals for electrical connection to external electrical equipment.

[0008] Preferably, the battery cell assembly is a pouch battery cell assembly, including a core and an aluminum-plastic film shell. The aluminum-plastic film shell is encapsulated on the core, and the core is provided with the tab assembly. The aluminum-plastic film shell has a redundant portion at its end. After the redundant portion is bent, it forms a support portion parallel to the end face of the core. The tab assembly passes through the support portion and is connected to the terminal.

[0009] Preferably, the PCM protection plate is arranged parallel to the support portion so that the support portion can support the surface of the PCM protection plate.

[0010] Preferably, the terminal is a solder pad, which is soldered to the tab assembly of the battery cell assembly.

[0011] Preferably, the pads include a first pad and a second pad, and the tabs of the battery cell assembly include a positive tab group and a negative tab group. The first pad is soldered to the positive tab group, and the second pad is soldered to the negative tab group.

[0012] Preferably, an insulating layer is sandwiched between the support portion and the PCM protection plate.

[0013] Preferably, the PCM protection board is further provided with a temperature sensing unit, which is disposed adjacent to the terminal to detect the temperature of the terminal.

[0014] Preferably, the PCM protection board is also provided with an overcurrent protection element.

[0015] Preferably, the PCM protection board has a limiting groove, which is used to limit and accommodate the gold finger.

[0016] Preferably, the portable replaceable battery further includes a flexible sleeve that wraps around the cell assembly and the PCM protection board.

[0017] The beneficial effects of the portable replaceable battery provided by this utility model are as follows: By forming a support portion on the cell assembly, the cell assembly can directly support the PCM protection board through the support portion. This allows for assembly of the cell assembly and PCM protection board using the cell assembly's own structure without introducing plastic brackets or related processes. Furthermore, by integrating the gold fingers onto the PCM protection board, the PCM protection board can directly fix and install the gold fingers instead of plastic brackets, thus eliminating the need for plastic brackets. Therefore, this portable replaceable battery can reduce manufacturing processes and the use of auxiliary materials, thereby significantly reducing PACK costs and repair costs. It not only simplifies the overall structure of the portable replaceable battery but also effectively improves production efficiency, meeting the needs of mass production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the portable replaceable battery provided in this embodiment of the utility model;

[0019] Figure 2 This is a front view of the portable replaceable battery provided in this embodiment of the utility model;

[0020] Figure 3 This is a side view of the portable replaceable battery provided in this embodiment of the utility model.

[0021] In the picture:

[0022] 11. Support unit; 12. Tab assembly; 121. Positive tab assembly; 122. Negative tab assembly; 2. PCM protection board; 21. Temperature sensing unit; 22. Overcurrent protection element; 3. Gold fingers; 4. Insulation layer; 5. Flexible sleeve. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0027] Existing portable battery pack solutions all require plastic brackets to secure the battery cells, PCM, and gold fingers. The addition of these brackets necessitates numerous additional steps in the packing process, increasing labor and material costs and resulting in higher packing costs. Furthermore, this packing method leads to extremely low production efficiency, making automation and mass production difficult, and hindering the ability to meet future high-volume demands.

[0028] In order to address the technical shortcomings of existing technologies, and in combination with Figures 1 to 3 As shown, this embodiment provides a portable replaceable battery, which includes a cell assembly, a PCM protection board 2, and gold fingers 3. The end of the cell assembly forms a support portion 11, which supports the PCM protection board 2. The PCM protection board 2 has terminals for connecting to the tab assembly 12 of the cell assembly. The gold fingers 3 are mounted on the PCM protection board 2 and are configured as output terminals for electrical connection to external electrical devices.

[0029] In the above configuration, by forming a support portion 11 at the end of the battery cell assembly, the battery cell assembly can directly support the PCM protection board 2 using its own structure. This eliminates the need for plastic brackets and related processes to assemble the battery cell assembly and the PCM protection board 2. Furthermore, by integrating the gold fingers 3 onto the PCM protection board 2, the PCM protection board 2 can directly fix and install the gold fingers 3, replacing the need for plastic brackets. Therefore, this portable replaceable battery reduces manufacturing processes and the use of auxiliary materials, significantly lowering PACK costs and repair costs. It not only simplifies the overall structure of the portable replaceable battery but also effectively improves production efficiency, meeting the needs of mass production.

[0030] Specifically, in this embodiment, the battery cell assembly is a pouch battery cell assembly. Compared with steel-cased lithium-ion batteries, pouch battery cell assemblies have advantages such as small size, light weight, high energy density, and high safety. They are not only easy to carry, but also further improve the range stability of existing portable replaceable batteries. The pouch battery cell assembly specifically includes a battery cell and an aluminum-plastic film shell, wherein the aluminum-plastic film shell is used to encapsulate the battery cell. The battery cell is provided with the aforementioned tab assembly 12. The aluminum-plastic film shell has a redundant portion at the end. After the redundant portion is bent, it can form a support portion 11 parallel to the end face of the battery cell, thereby reducing the molding difficulty of the support portion 11 and avoiding complex and cumbersome molding processes. After the support portion 11 is formed, the tab assembly 12 of the battery cell is inserted into the support portion 11 and then connected to the terminal.

[0031] Furthermore, in this embodiment, reference is made to... Figure 1 As shown, this battery cell assembly is a same-side tab type, meaning that both the positive tab group 121 and the negative tab group 122 included in the tab group 12 are located on the upper end of the battery cell facing the PCM protection board 2. This reduces the distance between the tab group 12 and the PCM protection board 2, facilitating a secure connection between them. Compared to a dual-tab type battery cell assembly, this eliminates the need to use nickel strips to connect the tab group 12 (positive tab group 121 or negative tab group 122) located away from the PCM protection board 2 to the terminals, thus simplifying the overall structure and reducing the probability of malfunctions during use.

[0032] In this embodiment, the terminals are solder pads, and the tab assembly 12 is soldered to the solder pads to form a more robust connection between the PCM protection board 2 and the tab assembly 12. Simultaneously, the solder pad structure improves the ability to identify whether there are poor solder joints in the tab assembly 12, thereby improving the reliability of the battery system. Specifically, the solder pads include a first solder pad and a second solder pad. The first solder pad is soldered to the positive tab assembly 121, and the second solder pad is soldered to the negative tab assembly 122, thereby ensuring the safety of battery use and preventing electrical short circuits.

[0033] Optionally, in this embodiment, the PCM protection board 2 is further provided with a temperature sensing unit 21. The temperature sensing unit 21 is disposed adjacent to the terminal to detect the temperature of the terminal in real time, thereby preventing the battery from charging and discharging when the temperature is abnormal, so as to increase the battery's service life and improve its safety and reliability.

[0034] Specifically, in one embodiment of this invention, the temperature sensing unit 21 includes an NTC thermistor. The NTC thermistor can be manufactured on the surface of the PCM protection board 2 by thin film coating processes such as physical vapor deposition, vacuum plating, and thermal spraying, which not only facilitates connection and fixation, but also achieves the measurement of cell temperature without reducing the energy density of the battery.

[0035] Optionally, in this embodiment, the PCM protection board 2 is also integrated with an overcurrent protection element 22, so that when the temperature on the PCM protection board 2 near the tab group 12 exceeds the safe range, the overcurrent protection element 22 can cut off the current flow, thereby preventing the PCM protection board 2 from overheating and being damaged due to excessive current.

[0036] Specifically, in one embodiment of this invention, the temperature sensing unit 21 includes a PTC thermistor. The PTC thermistor can also be manufactured on the surface of the PCM protection board 2 using thin-film coating processes such as physical vapor deposition, vacuum plating, and thermal spraying. During use, the resistance of the PTC thermistor increases with increasing temperature. When the current flowing through the PTC thermistor is too large, the temperature of the PTC thermistor rises accordingly, causing its resistance to increase sharply. This increased resistance reduces the current flowing through the PCM protection board 2, thereby preventing excessive temperature on the PCM protection board 2 and providing overcurrent protection.

[0037] Of course, in other alternative embodiments, multiple PTC thermistors and multiple NTC thermistors can also be provided on the surface of the PCM protection board 2 to meet the requirements of higher accuracy and more efficient response to temperature changes. This utility model is not limited in this respect.

[0038] Optionally, the PCM protection board 2 is arranged parallel to the end face of the battery cell, so that the large surface area of ​​the PCM protection board 2 can overlap the support part 11, allowing the gold fingers 3 on the PCM protection board 2 to contact the receiving terminal of the external electrical device along the direction of the battery cell axis. The PCM protection board 2 can also be laid flat on the top of the support part 11, thereby reducing the installation height of the PCM protection board 2 and saving the installation space of the entire portable replaceable battery.

[0039] Optionally, in this embodiment, an insulating layer 4 is sandwiched between the support portion 11 and the PCM protection plate 2. The insulating layer 4 not only allows the support portion 11 to stably support the PCM protection plate 2, but also provides electrical insulation between the tab assembly 12 and the PCM protection plate 2, preventing electrical short circuits between the battery cell and the PCM protection plate 2. The insulating layer 4 can be made of any one or more insulating materials with elastic properties, such as silicone rubber, polyimide (PI), and polytetrafluoroethylene (PTFE). While ensuring insulation performance, by inserting the insulating layer 4 into the gap between the PCM protection plate 2 and the support portion 11, and in conjunction with the limiting function of the tab assembly 12, the PCM protection plate 2 can be stably fixed at the end of the battery cell assembly, preventing tilting or misalignment of the PCM protection plate 2, thus ensuring the safety and reliability of the battery.

[0040] Optionally, in this embodiment, a limiting groove is provided on the side of the PCM protection board 2 away from the support part 11, and the gold finger 3 is limited and accommodated in the limiting groove. The setting of the limiting groove can effectively solve the positioning problem of the gold finger 3 during the portable replaceable battery PACK process, ensure the reliability of the connection between the gold finger 3 and the PCM protection board 2, and thus ensure that the gold finger 3 will not loosen or shift during the assembly of the PCM protection board 2 and the battery cell, thus ensuring the finished quality of the battery.

[0041] Optionally, the portable replaceable battery provided in this embodiment also includes a flexible sleeve 5. The flexible sleeve 5 wraps around the outer surface of the cell assembly and the PCM protection board 2. The flexible sleeve 5 can effectively wrap the cell assembly and the PCM protection board 2, providing physical protection for both and preventing damage or wear from external environmental factors. In addition, the use of the flexible sleeve 5 can also make the battery assembly process simpler. The flexible sleeve 5 can effectively fix and lock the cell assembly and the PCM protection board 2, solving the problem of loose battery edges, and also making the entire portable replaceable battery more aesthetically pleasing.

[0042] Preferably, the flexible sleeve 5 is a heat-shrink tubing. After assembling the PCM protection board 2 and the battery cell assembly, the heat-shrink tubing is placed over both. At a set temperature, the heat-shrink tubing shrinks and locks the PCM protection board 2 and the battery cell assembly tightly, thus forming a portable replaceable battery. Furthermore, because the heat-shrink tubing is open at both ends, the gold fingers 3 on the PCM protection board 2 can be exposed after heat shrinking, without interfering with the connection between the gold fingers 3 and external electrical devices. In the above configuration, the flexible sleeve 5 formed by the heat-shrink tubing has the advantage of high temperature resistance during use, is not easily punctured, and ensures the safety of the portable replaceable battery.

[0043] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A portable replaceable battery characterized by, The application relates to a portable replaceable battery, which comprises an electric core assembly, a PCM protection plate (2) and a golden finger (3), the end of the electric core assembly forms a supporting part (11) for supporting the PCM protection plate (2), the PCM protection plate (2) is provided with a wiring terminal for connecting with a tab group (12) of the electric core assembly, and the golden finger (3) is installed on the PCM protection plate (2) and is arranged as an output terminal for electrically connecting with external electrical equipment. The electric core assembly is a soft package electric core assembly and comprises a roll core and an aluminum plastic film shell, the roll core is provided with the tab group (12), the aluminum plastic film shell is arranged on the roll core, the aluminum plastic film shell is provided with a redundant part at an end, the redundant part is bent to form the supporting part (11) parallel to the end surface of the roll core, the tab group (12) is arranged in the supporting part (11) and is connected with the wiring terminal.

2. The portable replaceable battery of claim 1, wherein, The PCM protection plate (2) is arranged parallel to the supporting part (11) so that the supporting part (11) can support the surface of the PCM protection plate (2).

3. The portable replaceable battery of claim 2, wherein, The wiring terminal is a soldering pad which is welded with the tab group (12) of the electric core assembly.

4. The portable replaceable battery of claim 1, wherein, The soldering pad comprises a first soldering pad and a second soldering pad, the tab group (12) of the electric core assembly comprises a positive tab group (121) and a negative tab group (122), the first soldering pad is welded with the positive tab group (121), and the second soldering pad is welded with the negative tab group (122).

5. The portable replaceable battery of claim 4, wherein, An insulating layer (4) is arranged between the supporting part (11) and the PCM protection plate (2).

6. The portable replaceable battery of claim 1, wherein, The PCM protection plate (2) is further provided with a temperature sensing part (21) which is arranged adjacent to the wiring terminal to detect the temperature of the wiring terminal.

7. The portable replaceable battery of claim 1, wherein, The PCM protection plate (2) is further provided with an overcurrent protection element (22).

8. The portable replaceable battery of claim 1, wherein, The PCM protection plate (2) is provided with a limiting groove for limiting the golden finger (3).

9. The portable replaceable battery of claim 1, wherein, The portable replaceable battery further comprises a flexible sleeve (5) which is arranged around the electric core assembly and the PCM protection plate (2).

10. The portable replaceable battery of claim 1, wherein, ​

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