Waterproof battery pack

Abstract

The utility model is suitable for the technical field of battery packs, and provides a waterproof battery pack which comprises a battery assembly, a terminal assembly, a sealing element, an upper shell and a lower shell, a containing cavity is formed in the lower shell, the battery assembly and the terminal assembly are both installed in the containing cavity, and the sealing piece is arranged around the terminal assembly. A sealing piece is arranged around a terminal assembly, a step part is arranged on an upper shell, an abutting part is arranged on the inner wall of the upper shell, the abutting part and the step part are arranged at an interval to form a containing groove, at least part of the terminal assembly is located in the containing groove, and the bottom of the step part and the bottom of the abutting part abut against the sealing piece. Thus, the sealing piece is sealed in the circumferential direction around the terminal assembly, the sealing effect is good, the sealing piece is extruded through the step part and the abutting part together, the sealing piece can be effectively deformed, the sealing effect of the sealing piece is further improved, and the overall waterproof performance of the battery pack is further improved.

Description

Technical Field

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

[0002] With the rapid development of new energy technologies, battery packs for storing electrical energy are widely used in various products due to their ability to provide stable power. Battery packs are equipped with connection terminals for external devices to connect to for power or to charge the battery pack. This necessitates openings in the battery pack casing through which the connection terminals make electrical connections to external devices.

[0003] In related technologies, battery packs typically include a structure to seal the connection terminals, usually by installing rubber sealing rings. However, this sealing method has weak waterproofing capabilities, and the rubber sealing rings are prone to aging and have a short lifespan, leading to seal failure. This allows dust and moisture to easily enter the battery pack, causing damage to internal components. Therefore, existing battery pack sealing structures suffer from poor sealing reliability. Utility Model Content

[0004] In view of this, the present invention provides a waterproof battery pack to solve the problem of poor sealing reliability of the product.

[0005] To solve the above problems, the technical solution of this utility model is as follows:

[0006] A waterproof battery pack includes: a battery assembly for storing electrical energy; a terminal assembly electrically connected to the battery assembly, the terminal assembly being at least used for power transfer between the battery assembly and an external device; an upper shell having a recessed step portion, the step portion having a connection port for the external device to be inserted and connected to the terminal assembly; a lower shell having an internal cavity, the battery assembly and the terminal assembly being installed in the cavity, the upper shell and the lower shell being sealed together; and a sealing member surrounding the terminal assembly; wherein the inner wall of the upper shell has a protruding abutment portion flush with the bottom surface of the step portion, the abutment portion and the step portion being spaced apart to form a receiving groove, at least a portion of the terminal assembly being located within the receiving groove, and the bottom of the step portion and the bottom of the abutment portion both pressing against the sealing member.

[0007] In some embodiments, the terminal assembly includes: multiple connecting terminals spaced apart, each connecting terminal including a fixed end for fixing and a plug end for inserting and connecting an external device; a circuit board, each connecting terminal being fixed on the circuit board, and the fixed end on each connecting terminal being connected and fixed to the circuit board, the battery assembly being electrically connected to the circuit board; wherein, the sealing member is disposed around each connecting terminal on the circuit board, and the stepped portion and the abutting portion simultaneously press the sealing member against the circuit board.

[0008] In some embodiments, the abutting portion extends along the arrangement direction of each of the connecting terminals, and the length of the extension is greater than the arrangement length of each of the connecting terminals.

[0009] In some embodiments, the abutment portion has a hollow structure inside.

[0010] In some embodiments, the terminal assembly further includes: a mounting base stacked on the circuit board, each of the connecting terminals being injection molded to the mounting base, and the fixed end and the plug end of each of the connecting terminals being exposed on opposite sides of the mounting base; wherein the fixed end of each of the connecting terminals is connected and fixed to the circuit board, and the sealing member is injection molded around each of the connecting terminals on the mounting base.

[0011] In some embodiments, the mounting base has a groove surrounding each of the connecting terminals, and the seal is injection molded into the groove.

[0012] In some embodiments, the fixing seat includes: a base, on which the seal is injection molded; a boss protruding from the base, and each of the connecting terminals being fixed in the boss; wherein the seal is arranged around the boss.

[0013] In some embodiments, the waterproof battery pack further includes: a support frame disposed within the receiving cavity, the support frame having an installation space formed therein, the battery assembly being installed within the installation space; wherein the terminal assembly is fixed to the support frame.

[0014] In some embodiments, the terminal assembly includes a circuit board, a positioning plug is provided on the support frame, a positioning groove is provided on the circuit board, and the positioning plug is inserted into the positioning groove.

[0015] In some embodiments, the upper shell is provided with a connector at the position where it is connected to the lower shell, and the lower shell is provided with a sealing groove at the position where it is connected to the upper shell. The connector is inserted into the sealing groove and fused together.

[0016] This utility model provides a waterproof battery pack, including a battery assembly, a terminal assembly, a seal, an upper shell, and a lower shell. The terminal assembly is electrically connected to the battery assembly, the seal surrounds the terminal assembly, a receiving cavity is formed inside the lower shell, and the upper shell is sealed to the lower shell. Both the battery assembly and the terminal assembly are installed within the receiving cavity. This utility model employs a method where the seal surrounds the terminal assembly, and the upper shell has a recessed step. A contact portion protrudes from the inner wall of the upper shell, flush with the bottom surface of the step. A receiving groove is formed at intervals between the contact portion and the step, placing at least a portion of the terminal assembly within the receiving groove. The bottom of both the step and the contact portion press against the seal. This creates a circumferential seal around the terminal assembly, improving the sealing effect between the seal and the terminal assembly. Furthermore, the combined compression of the seal by the step and the contact portion allows for effective deformation sealing, further enhancing the sealing effect and improving the overall sealing performance of the battery pack, thus improving product quality. Attached Figure Description

[0017] Figure 1 This is a perspective view of the waterproof battery pack provided in an embodiment of the present utility model;

[0018] Figure 2 This is a top view of the waterproof battery pack provided in this embodiment of the utility model;

[0019] Figure 3 yes Figure 2 Schematic diagram of the cross section at point AA;

[0020] Figure 4 This is an exploded view of the waterproof battery pack provided in an embodiment of the present invention;

[0021] Figure 5 This is an exploded view of the sealing element and terminal assembly provided in an embodiment of the present utility model;

[0022] Figure 6 yes Figure 3 A magnified view of a portion of point B in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Waterproof battery pack; 11. Battery assembly; 12. Terminal assembly; 121. Connecting terminal; 122. Circuit board; 1221. Positioning groove; 123. Fixing base; 1231. Base; 1232. Boss; 124. Groove; 13. Upper shell; 131. Stepped part; 132. Connection port; 133. Abutment part; 134. Receiving groove; 135. Connector; 14. Lower shell; 141. Receiving cavity; 142. Sealing groove; 15. Seal; 16. Support frame; 161. Positioning plug. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0027] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0028] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0029] like Figures 1 to 3As shown in the figure, this utility model provides a waterproof battery pack 1 for storing electrical energy and releasing the stored electrical energy when needed. The waterproof battery pack 1 includes a battery assembly 11, a terminal assembly 12, an upper shell 13, a lower shell 14, and a sealing element 15. Specifically, the battery assembly 11 is the core part of the waterproof battery pack 1, used for storing electrical energy. The battery assembly 11 can adopt various existing battery technologies, such as lithium-ion batteries and lithium polymer batteries, to meet the power requirements of different products. The terminal assembly 12 is electrically connected to the battery assembly 11, and the terminal assembly 12 can be detachably connected to external devices, and can also be used for at least the transfer of electrical energy between the battery assembly 11 and external devices. The terminal assembly 12 and the battery assembly 11 can be electrically connected by welding, and the part of the terminal assembly 12 used for connecting external devices can be treated with gold plating or nickel plating to improve conductivity and corrosion resistance, thereby improving the overall reliability and service life of the terminal assembly 12.

[0030] The upper shell 13 has a recessed step 131, on which a connection port 132 is provided. The portion of the installed terminal assembly 12 for connecting external devices is located in or opposite the connection port 132, allowing the external device to be inserted through the connection port 132 for electrical connection with the terminal assembly 12. Specifically, the recessed step 131 on the upper shell 13 refers to... Figure 3 In the state shown, the portion of the upper shell 13 used to cover the terminal assembly 12 is recessed toward the direction of the terminal assembly 12, so as to reduce the distance between it and the terminal assembly 12, thereby forming a stepped structure.

[0031] The lower shell 14 has a hollow interior forming a receiving cavity 141. The battery assembly 11 and the terminal assembly 12 are both installed in the receiving cavity 141, and the upper shell 13 is sealed to the lower shell 14, thereby achieving a sealed assembly. The interior of the assembled waterproof battery pack 1 is only connected to the outside through the connection port 132.

[0032] Specifically, to avoid affecting the overall internal sealing and waterproofing performance due to the placement of the connection port 132, a sealing element 15 is provided and positioned around the terminal assembly 12. The sealing element 15 can be made of highly elastic silicone material and is positioned around the terminal assembly 12. The design of the sealing element 15 refers to the shape and size of the terminal assembly 12 to ensure that it can form a tight waterproof barrier around the terminal assembly 12, and the sealing element 15 maintains a certain degree of elasticity. In this way, during the assembly between the upper shell 13 and the lower shell 14, the sealing element 15 can be deformed by compression, thereby achieving a seal along the contour shape of the sealing element 15, achieving reliable sealing and waterproofing of the interior of the waterproof battery pack 1.

[0033] In this embodiment of the invention, to ensure the sealing effect of the sealing member 15, an abutment portion 133 protrudes from the inner wall of the upper shell 13 and is flush with the bottom surface of the stepped portion 131. Furthermore, a receiving groove 134 is formed between the abutment portion 133 and the stepped portion 131 at a distance. At least a portion of the terminal assembly 12 is located within the receiving groove 134, and the bottom of both the stepped portion 131 and the bottom of the abutment portion 133 press against the sealing member 15. Specifically, a receiving groove 134 is formed between the abutment portion 133 and the stepped portion 131. At least a portion of the terminal assembly 12 that connects to an external device is located within the receiving groove 134. Moreover, the connection port 132 communicates with the interior of the receiving groove 134, allowing the external device to be inserted through the connection port 132 to achieve electrical connection with the terminal assembly 12. Furthermore, by providing the abutment portion 133, which extends toward the direction of the seal 15, it not only ensures that the seal 15 can be stably squeezed after assembly, but also ensures that the receiving groove 134 formed by the abutment portion 133 and the step portion 131 matches the contour shape of the seal 15, thereby further achieving stable squeezing of the seal 15 and thus achieving effective sealing.

[0034] The waterproof battery pack 1 provided in this embodiment includes a battery assembly 11, a terminal assembly 12, a sealing member 15, an upper shell 13, and a lower shell 14. The upper shell 13 has a connection port 132 for inserting an external device to connect to the terminal assembly 12. The lower shell 14 has a receiving cavity 141. The upper shell 13 and the lower shell 14 are sealed together. The battery assembly 11 and the terminal assembly 12 are both installed in the receiving cavity 141. The sealing member 15 is arranged around the terminal assembly 12. This embodiment of the invention employs a sealing element 15 surrounding the terminal assembly 12, with a recessed step 131 on the upper shell 13. An abutment portion 133, flush with the bottom surface of the step 131, protrudes from the inner wall of the upper shell 13. A receiving groove 134 is formed between the abutment portion 133 and the step 131, with at least a portion of the terminal assembly 12 located within the receiving groove 134. Both the bottom of the step 131 and the bottom of the abutment portion 133 press against the sealing element 15. This creates a circumferential seal around the terminal assembly 12, improving the sealing connection between the sealing element 15 and the terminal assembly 12. Furthermore, the combined compression of the sealing element 15 by the step 131 and the abutment portion 133 effectively deforms the sealing element 15, achieving a seal and further enhancing its sealing effect. This, in turn, improves the overall waterproof performance of the battery pack and enhances the product quality.

[0035] In some embodiments, such as Figure 3 and Figure 4As shown, the terminal assembly 12 includes connection terminals 121 and a circuit board 122. Multiple connection terminals 121 are spaced apart. Each connection terminal 121 is made of conductive metal bent into a corresponding shape according to specific design requirements. Each connection terminal 121 includes a fixing end for fixation and a plug-in end for insertion into an external device. The plug-in end has a certain elastic deformation property, thereby stably clamping the external device and achieving a reliable electrical connection. Each connection terminal 121 is fixed to the circuit board 122, and the fixing end of each connection terminal 121 is connected and fixed to the circuit board 122. Simultaneously, the battery assembly 11 is also electrically connected to the circuit board 122. Specifically, the circuit board 122 has fixing holes, and the fixing ends of each connection terminal 121 are inserted into the corresponding fixing holes and fixed by welding, achieving an electrical connection with the circuit board 122. A sealing member 15 is disposed around each connection terminal 121 on the circuit board 122, forming a closed-loop structure. In this way, each connection terminal 121 is located within the area enclosed by the sealing element 15. The stepped portion 131 and the abutting portion 133 simultaneously press the sealing element 15 against the circuit board 122, causing the sealing element 15 to deform and achieving a closed-loop seal around each connection terminal 121. This configuration ensures the product's overall waterproof rating meets IPX6-IPX7 protection standards, and its dustproof capability far exceeds that of traditional lithium battery packs. It can operate in high-temperature and high-humidity environments and resist corrosive media such as salt spray and rain, reducing electrode oxidation rates.

[0036] In some embodiments, the abutment portion 133 extends along the arrangement direction of each connecting terminal 121, and the length of the extension is greater than the arrangement length of each connecting terminal 121. This arrangement ensures that all portions of the seal 15 for compression by the abutment portion 133 correspond to the abutment portion 133, thereby completely compressing the sealing ring to cause deformation, thus achieving an effective seal. Furthermore, referring to… Figure 3 Alternatively, the width W1 of the abutment portion 133 can be set to be greater than the width W2 of the seal 15. In this way, the abutment portion 133 can keep pressing the seal 15, which can further ensure that the abutment portion 133 can reliably press the seal 15 to seal.

[0037] In some embodiments, such as Figure 3 As shown, the abutment portion 133 can also be configured with a hollow internal structure. This can be achieved by recessing a groove inward on the top surface, or by forming holes at intervals along the extending direction of the abutment portion 133. By providing a hollow structure, the overall material usage of the upper shell 13 can be reduced without sacrificing the structural strength of the abutment portion 133, thereby reducing the weight of the upper shell 13 and meeting the requirements for lightweighting. Of course, it is understandable that the abutment portion 133 can also be configured as a solid structure.

[0038] In some embodiments, such as Figure 4 and Figure 5 As shown, the terminal assembly 12 also includes a mounting base 123. The mounting base 123 is formed by injection molding and stacked on the circuit board 122. Furthermore, each connecting terminal 121 is injection molded and fixed to the mounting base 123, with the fixed end and plug-in end of each connecting terminal 121 exposed on opposite sides of the mounting base 123. The fixed end of each connecting terminal 121 is connected and fixed to the circuit board 122. The sealing member 15 is mounted on the mounting base 123 around each connecting terminal 121, or injection molded onto the mounting base 123 around each connecting terminal 121. Specifically, each connecting terminal 121 is simultaneously bonded and fixed during the injection molding of the mounting base 123, resulting in good fixing reliability. Moreover, since each connecting terminal 121 is bonded inside the mounting base 123, it also achieves its own sealing connection. The fixed end of each connecting terminal 121 is connected and fixed to the circuit board 122, allowing each connecting terminal 121 to be more stably fixed to the circuit board 122, resulting in good robustness. This method, by setting a fixing base 123 and fixing each connecting terminal 121 inside the fixing base 123, and then individually sleeved or injection molded a sealing element 15 around each connecting terminal 121 on the fixing base 123, achieves sealing of the entire interior of the waterproof battery pack 1 by only sealing the gap between the upper shell 13 and the sealing element 15, simplifying the difficulty of overall sealing. Moreover, by using injection molding to form the sealing element 15, there is no need to set and install the sealing element 15 separately or position it during installation, improving the convenience of assembly. At the same time, the sealing element 15 is not prone to aging, has a long service life, and can maintain a reliable sealing state for a long time, improving product quality.

[0039] Furthermore, an adhesive layer can be provided between the fixing base 123 and the circuit board 122 for bonding. This not only improves the stability of the connection between the fixing base 123 and the circuit board 122, but also prevents water and dust from entering between the fixing base 123 and the circuit board 122.

[0040] In some embodiments, such as Figure 4 and Figure 5As shown, the mounting base 123 has grooves 124 surrounding each connecting terminal 121, and the sealing element 15 is injection molded into the grooves 124. In this way, by providing the grooves 124, the shape of the injection-molded sealing element 15 is restricted, allowing the sealing element 15 to be molded along the path of the grooves 124. Simultaneously, the grooves 124 also increase the contact area for adhesion between the sealing element 15 and the mounting base 123, thereby improving the reliability of the seal between the sealing element 15 and the mounting base 123. When the sealing element 15 is compressed, the grooves 124 also restrict the position of the sealing element 15, reducing the possibility of slippage and ensuring the reliability of the sealing effect.

[0041] In some embodiments, such as Figure 4 and Figure 5 As shown, the mounting base 123 includes a base 1231 and a boss 1232. The base 1231 is stacked on the circuit board 122. A groove 124 is disposed on the base 1231 surrounding the outline of the boss 1232. The sealing element 15 is injection molded onto the mounting base 123. The boss 1232 protrudes from the base 1231, and each connecting terminal 121 is fixed in the boss 1232, with the sealing element 15 surrounding the boss 1232. This structure of the mounting base 123 ensures that the position of each connecting terminal 121 on the mounting base 123 is higher than the position of the sealing ring. Even when water enters, the raised design of the boss 1232 can isolate a certain amount of direct water contact, thus protecting the connecting terminals 121 from short circuits caused by direct water flow and improving safety.

[0042] In some embodiments, such as Figure 3 and Figure 4 As shown, the waterproof battery pack 1 also includes a support frame 16. The support frame 16 is disposed within the receiving cavity 141, and an installation space is formed inside the support frame 16. The battery assembly 11 is installed within the installation space, and the terminal assembly 12 is fixed to the support frame 16. Specifically, the support frame 16 has a certain structural strength. Installing the battery assembly 11 within the installation space formed by the support frame 16 protects the battery assembly 11 from compression, ensuring the safety of its use. Simultaneously, fixing the terminal assembly 12 to the support frame 16 also provides stable support for the position of the terminal assembly 12, enabling a stable electrical connection with external devices.

[0043] In one embodiment, the support frame 16 can be formed by splicing two parts, which facilitates the installation of the battery assembly 11 and also simplifies manufacturing. In another embodiment, the support frame 16 can be configured as a single integral structure, offering greater flexibility in its design.

[0044] In some embodiments, such as Figure 4 and Figure 5 As shown, the terminal assembly 12 includes a circuit board 122, a positioning plug 161 is provided on the support frame 16, and a positioning groove 1221 is formed on the circuit board 122, into which the positioning plug 161 is inserted. Thus, by directly forming the positioning groove 1221 on the current board and the positioning plug 161 on the support frame 16, when installing the entire terminal assembly 12 and the support frame 16, it is only necessary to insert the positioning plug 161 into the corresponding positioning groove 1221. The overall structure is simple, the positioning connection is convenient, and the positioning effect is reliable.

[0045] In some embodiments, Figure 3 and Figure 6 As shown, a connector 135 is provided at the position where the upper shell 13 connects to the lower shell 14, and a sealing groove 142 is provided at the position where the lower shell 14 connects to the upper shell 13. The connector 135 is inserted into the sealing groove 142 and fused together. This mating connection between the connector 135 and the sealing groove 142 ensures convenient and accurate connection between the upper shell 13 and the lower shell 14. The ultrasonic welding provides a strong, durable connection that is difficult to disassemble, resulting in a reliable overall seal. Furthermore, it prevents accidental disassembly and damage, improving the overall safety of the product.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof battery pack, characterized in that, include: Battery components are used to store electrical energy; A terminal assembly electrically connected to the battery assembly, the terminal assembly being used at least for the transfer of electrical energy between the battery assembly and an external device; The upper shell is provided with a recessed step portion, and the step portion has a connection port for the external device to be inserted and connected to the terminal assembly; The lower shell has an internal cavity, in which the battery assembly and the terminal assembly are installed. The upper shell is sealed to the lower shell. A seal is disposed around the terminal assembly; The inner wall of the upper shell has a protruding abutment portion that is flush with the bottom surface of the stepped portion. The abutment portion and the stepped portion are spaced apart to form a receiving groove. At least a portion of the terminal assembly is located in the receiving groove. The bottom of the stepped portion and the bottom of the abutment portion both press against the sealing element.

2. The waterproof battery pack as described in claim 1, characterized in that, The terminal assembly includes: Multiple connection terminals are spaced apart, and each connection terminal includes a fixing end for fixing and a plug-in end for inserting and connecting the external device; The circuit board has each of the connecting terminals fixed on it, and the fixed end on each of the connecting terminals is connected and fixed to the circuit board. The battery assembly is electrically connected to the circuit board. The sealing element is disposed on the circuit board surrounding each of the connecting terminals, and the stepped portion and the abutting portion simultaneously press the sealing element against the circuit board.

3. The waterproof battery pack as described in claim 2, characterized in that, The abutting portion extends along the arrangement direction of each of the connecting terminals, and the length of the extension is greater than the arrangement length of each of the connecting terminals.

4. The waterproof battery pack as described in claim 1, characterized in that, The interior of the contact portion has a hollow structure.

5. The waterproof battery pack as described in claim 2, characterized in that, The terminal assembly also includes: A mounting base is stacked on the circuit board, and each of the connecting terminals is injection molded to the mounting base, with the fixed end and the plug-in end of each of the connecting terminals exposed on opposite sides of the mounting base. The fixed end on each of the connecting terminals is connected and fixed to the circuit board, and the sealing element is injection molded around each of the connecting terminals on the fixed base.

6. The waterproof battery pack as described in claim 5, characterized in that, The mounting base has grooves surrounding each of the connecting terminals, and the sealing element is injection molded into the grooves.

7. The waterproof battery pack as described in claim 5, characterized in that, The fixing base includes: The base, wherein the sealing element is injection molded onto the fixed seat; A boss protrudes from the base, and each of the connecting terminals is fixed in the boss. The sealing element is arranged around the boss.

8. The waterproof battery pack according to any one of claims 1 to 7, characterized in that, The waterproof battery pack also includes: A support frame is disposed within the receiving cavity, and an installation space is formed inside the support frame, in which the battery assembly is installed; The terminal assembly is fixed on the support frame.

9. The waterproof battery pack as described in claim 8, characterized in that, The terminal assembly includes a circuit board, a positioning plug is provided on the support frame, a positioning groove is provided on the circuit board, and the positioning plug is inserted into the positioning groove.

10. The waterproof battery pack according to any one of claims 1 to 7, characterized in that, The upper shell is provided with a connector at the position where it is connected to the lower shell, and the lower shell is provided with a sealing groove at the position where it is connected to the upper shell. The connector is inserted into the sealing groove and fused together.

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