Battery pack structure

Abstract

The utility model discloses a battery pack structure. The battery pack structure comprises a battery cell; the protection plate is electrically connected with the battery cell; the insulating bracket is arranged at the axial end part of the battery cell and is connected with the protection plate, and one end of the protection plate extends out and is clamped on the end surface of the insulating bracket. One end of the protection plate extends out and is clamped on the end face of the insulation support, the protection plate extending out of the end face of the insulation support can be stably fixed through the clamping structure, the protection plate is prevented from rebounding, tilting, shifting, deforming and other actions, and therefore the electric connection effect of the protection plate and the electric device is guaranteed, and the electric device can be normally used.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack structure. Background Technology

[0002] Currently, end products are becoming increasingly thinner, and the use of various soft-pack batteries is becoming more widespread. For example, CN112787031 B discloses a soft-pack battery structure built into an end product, which includes at least one battery cell, a protection board, and a protection board support. The battery cell is electrically connected to the protection board, the protection board support is used to fix the protection board, and the protection board is electrically connected to an electrical device through a flexible circuit board. The flexible circuit board is provided with a connector for electrical connection with the electrical device, and the connector of the flexible circuit board is exposed on the outside of the protection board support. In this soft-pack battery structure, the connector of the flexible circuit board is directly exposed on the outside of the protection board support, which makes it prone to rebound, tilting, displacement, deformation, etc., thereby affecting the effectiveness of the electrical connection between the connector and the electrical device, and consequently affecting the normal use of the electrical device. Utility Model Content

[0003] To address the aforementioned deficiencies in the prior art, the purpose of this application is to provide a battery pack structure that can stably fix the protective plate extending from the end face of the insulating support, preventing the protective plate from rebounding, tilting, shifting, or deforming, thereby ensuring the electrical connection between the protective plate and the electrical device so that the electrical device can be used normally.

[0004] This application provides a battery pack structure, including:

[0005] Battery cell;

[0006] The protection board is electrically connected to the battery cell.

[0007] An insulating support is located at the axial end of the battery cell and connected to a protective plate. One end of the protective plate extends out and is secured to the end face of the insulating support.

[0008] In a preferred embodiment, the protection board in this application includes a rigid board and a flexible board that are electrically connected. The rigid board is disposed inside an insulating support and is electrically connected to the battery cell, while the flexible board extends out and is snapped onto the end face of the insulating support.

[0009] In a preferred embodiment, in this application, the end face of the insulating bracket is provided with a receiving groove for the flexible board, and the flexible board extends out of the insulating bracket and is disposed in the receiving groove.

[0010] In a preferred embodiment, in this application, the end face of the insulating bracket is provided with a pressure plate corresponding to the flexible plate, and the pressure plate presses against the circumferential edge of the flexible plate.

[0011] In a preferred embodiment, in this application, the rigid plate is electrically connected to the electrode tab of the battery cell, and an insulating sleeve is provided on the outer periphery of the rigid plate. The insulating sleeve has clearance holes at the connection between the rigid plate and the electrode tab.

[0012] In a preferred embodiment, in this application, the insulating support and the battery cell are connected by an injection molding block, which is made of plastic that fills the gap between the corresponding ends of the insulating support, the protective plate and the battery cell.

[0013] In a preferred embodiment, the injection block is formed by low-temperature injection molding, and the side of the insulating bracket is provided with positioning holes for positioning with the injection mold.

[0014] In a preferred embodiment, in this application, the end of the protective plate extending out of the insulating bracket is provided with a notch, and the injection molding block is provided with a pressure block corresponding to the notch, the pressure block is pressed on the notch and extends circumferentially.

[0015] In a preferred embodiment, the top side of the insulating bracket is provided with a groove, and the battery pack structure is connected to the power supply device through the groove.

[0016] In a preferred embodiment, in this application, an insulating tape is fitted over the other axial end of the battery cell, and a heat shrink tubing is fitted over the side of the battery cell. The heat shrink tubing is located outside the insulating tape, and a label is affixed to the outside of the heat shrink tubing. The label has a pull-out portion extending outside the heat shrink tubing.

[0017] The battery pack structure provided in this application has the following technical advantages:

[0018] One end of the protection plate extends out and is clamped onto the end face of the insulating bracket. The clamping structure can stably fix the protection plate extending out of the end face of the insulating bracket, so as to prevent the protection plate from rebounding, tilting, shifting, deforming, etc., thereby ensuring the electrical connection between the protection plate and the electrical device, so that the electrical device can be used normally. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the battery pack structure of this application;

[0020] Figure 2 This is an exploded view of the battery pack structure of this application;

[0021] Figure 3 An exploded view of the battery pack structure of this application without heat shrink tubing and labels;

[0022] Figure 4 This is a cross-sectional view of the connection structure of the battery cell, protection board and insulating sleeve in this application;

[0023] Figure 5 This is a connection structure diagram of the protective plate, insulating bracket and injection block in this application;

[0024] Figure 6 This is a schematic diagram of the protective plate, insulating support and injection block of this application.

[0025] Figure label:

[0026] 1. Battery cell; 11. Electrode tab; 2. Protection board; 21. Rigid board; 211. Nickel sheet; 22. Flexible board; 221. Notch; 3. Insulating bracket; 31. Receiving groove; 32. Pressure plate; 33. Positioning hole; 34. Groove; 4. Insulating sleeve; 41. Clearance hole; 5. Injection block; 51. Pressing block; 6. Heat shrink tubing; 7. Insulating tape; 8. Label; 81. Pull-out section. Detailed Implementation

[0027] To better understand and implement this application, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings.

[0028] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0030] See Figure 2 and Figure 3 This application provides a battery pack structure, including: a battery cell 1, a protection board 2, and an insulating support 3. The battery cell 1 includes a positive electrode, a negative electrode, a separator, and an electrolyte. The positive electrode, separator, and negative electrode are wound or stacked and then packaged, injected with electrolyte, and sealed to obtain the battery cell 1. The protection board 2 is provided with a protection circuit to prevent the battery pack from overcharging, over-discharging, or overcurrent. The protection board 2 is electrically connected to the battery cell 1 so that the battery cell 1 can be electrically connected to an external device, such as an electrical device, through the protection board 2.

[0031] An insulating bracket 3 is located at the axial end of the battery cell 1 and connected to a protective plate 2. One end of the protective plate 2 extends out and is secured to the end face of the insulating bracket 3. The insulating bracket 3 is used to fix the protective plate 2 and to provide insulation and protection for the protective plate 2. The insulating bracket 3 is located at one axial end of the battery cell 1. In this application, the axial end of the battery cell 1 where the insulating bracket 3 is located is defined as the head of the battery cell 1. The insulating bracket 3 is located at the head of the battery cell 1 and surrounds the protective plate 2. After the protective plate 2 is electrically connected to the tab 11 at the head of the battery cell 1, it extends out of the insulating bracket 3 to electrically connect to an external device, such as an electrical appliance.

[0032] One end of the protection plate 2 extends out and is clamped onto the end face of the insulating bracket 3. The clamping structure can stably fix the protection plate 2 extending out of the end face of the insulating bracket 3, so as to prevent the protection plate 2 from rebounding, tilting, shifting, deforming, etc., thereby ensuring the electrical connection between the protection plate 2 and the electrical device, so that the electrical device can be used normally.

[0033] Specifically, the protection board 2 includes a rigid board 21 and a flexible board 22 electrically connected. The rigid board 21 is disposed within the insulating support 3 and electrically connected to the battery cell 1. The flexible board 22 extends out and is secured to the end face of the insulating support 3. The rigid board 21 is a printed circuit board (PCB), and the flexible board 22 is a flexible circuit board (FPC). The insulating support 3 surrounds the rigid board 21, and the rigid board 21 is electrically connected to the tab 11 at the head of the battery cell 1. The flexible board 22 is connected to the end of the rigid board 21 and extends out of the insulating support 3, thereby being secured to the end face of the insulating support 3, so as to electrically connect the flexible board 22 to the electrical device.

[0034] Among them, combined Figure 4 and Figure 6 The rigid plate 21 is electrically connected to the tab 11 of the battery cell 1. An insulating sleeve 4 is fitted around the outer periphery of the rigid plate 21. The insulating sleeve 4 has a clearance hole 41 corresponding to the connection between the rigid plate 21 and the tab 11. The insulating sleeve 4 surrounds the outer periphery of the rigid plate 21 to insulate the rigid plate 21 from the battery cell 1, so that the tab 11 at the head of the battery cell 1 is electrically connected to the nickel sheet 211 of the rigid plate 21 only through the clearance hole 41 of the insulating sleeve 4. Thus, the insulating sleeve 4 provides good protection for the rigid plate 21. At the same time, the clearance hole 41 of the insulating sleeve 4 allows the flexible plate 22 to pass through after being connected to the rigid plate 21, so that the flexible plate 22 can be electrically connected to the electrical device. The insulating sleeve 4 can be common insulating tape in the prior art, which mainly serves as insulation protection and has a certain degree of high temperature resistance.

[0035] Regarding the mounting structure of the flexible circuit board 22, combined with Figure 5 and Figure 6The end face of the insulating bracket 3 is provided with a receiving groove 31 for the flexible board 22. The flexible board 22 extends out of the insulating bracket 3 and is placed in the receiving groove 31. The receiving groove 31 has the function of guiding and accommodating the installation of the flexible board 22. After the flexible board 22 extends out of the insulating bracket 3, it can be bent and inserted into the receiving groove 31, thereby positioning it in the receiving groove 31. The receiving groove 31 is used to fix the protruding part of the flexible board 22 to a certain extent, thereby improving the stability of the electrical connection between the flexible board 22 and the electrical device.

[0036] Furthermore, the end face of the insulating bracket 3 is provided with a pressure plate 32 corresponding to the flexible plate 22, and the pressure plate 32 presses against the circumferential edge of the flexible plate 22. The pressure plate 32 is provided at the circumferential edge of the receiving groove 31 and extends radially inward, so that the pressure plate 32 presses against the circumferential edge of the protruding part of the flexible plate 22, thereby combining the pressing action of the pressure plate 32 with the positioning action of the receiving groove 31 to fix the flexible plate 22, which helps to further improve the fixing effect of the flexible plate 22, thereby further improving the stability of the electrical connection between the flexible plate 22 and the electrical device.

[0037] The pressure plates 32 are preferably arranged in at least one set, which are arranged opposite each other on the circumferential edge of the receiving groove 31 and extend radially inward, which helps to improve the pressing and fixing effect of the soft plate 22, thereby ensuring that the soft plate 22 is stably fixed in the receiving groove 31.

[0038] Based on this, the insulating support 3 and the battery cell 1 are connected by an injection molding block 5, which is made of plastic that fills the gaps between the corresponding ends of the insulating support 3, the protective plate 2, and the battery cell 1. The injection molding block 5 is formed in the gaps between the corresponding ends of the insulating support 3, the protective plate 2, and the battery cell 1 using a low-temperature injection molding process, so as to connect the insulating support 3 and the battery cell 1 together, thereby reducing the impact of vibration on the protective plate 2 and its connection structure with the tab 11, and improving the insulation protection effect.

[0039] The injection block 5 is formed by low-temperature injection molding. The side of the insulating bracket 3 is provided with positioning holes 33 for positioning with the injection mold. The positioning holes 33 are provided so that when the battery cell 1, protection plate 2, and insulating bracket 3 are assembled and placed into the injection mold for low-temperature injection molding, the insulating bracket 3 can be positioned in the injection mold through the positioning holes 33, thereby preventing the insulating bracket 3 from being skewed and ensuring its insulation and protection effect. The number and position of the positioning holes 33 can be adaptively adjusted according to the internal positioning structure of the injection mold, as long as the positioning effect can be met.

[0040] The protective plate 2 has a notch 221 at one end extending from the insulating bracket 3. The injection molding block 5 has a pressure block 51 corresponding to the notch 221. The pressure block 51 presses against the notch 221 and extends circumferentially. Because the flexible plate 22 has a notch 221, when the battery cell 1, the protective plate 2, and the insulating bracket 3 are assembled and placed into the injection mold for low-temperature injection molding, a pressure block 51 will be formed at the notch 221 to press against the notch 221 and its periphery. Thus, the cooperation of the receiving groove 31, the pressure plate 32, and the pressure block 51 can effectively fix the protruding part of the flexible plate 22, so as to prevent the flexible plate 22 from rebounding, tilting, shifting, deforming, etc., thereby ensuring the electrical connection between the flexible plate 22 and the electrical device, that is, ensuring the stable electrical connection between the protective plate 2 and the electrical device, so that the electrical device can be used normally.

[0041] To ensure the normal operation of the electrical device, specifically a stable electrical connection between the protection board 2 and the device, it is necessary to guarantee both the fixation of the flexible board 22 and the installation stability of the battery pack structure. Therefore, a groove 34 is provided on the top side of the insulating bracket 3, through which the battery pack structure connects to the electrical device. Taking an example where the electrical device has a protrusion corresponding to the mounting position of the insulating bracket 3, the groove 34 corresponds to and is compatible with the protrusion, thus ensuring the stable installation of the battery pack structure within the electrical device. The groove 34 can be radially concave, downward concave, or upward concave, depending on the protrusion structure of the insulating bracket 3. Of course, when the mounting position of the electrical device has a recess, the battery pack structure has a corresponding protrusion. The connection structure between the battery pack structure and the electrical device can have various variations, as long as stable installation is achieved.

[0042] In addition, insulating tape 7 is fitted onto the other axial end of the battery cell 1, and heat shrink tubing 6 is fitted onto the side of the battery cell 1. The heat shrink tubing 6 is located outside the insulating tape 7, and a label 8 is affixed to the outside of the heat shrink tubing 6. The label 8 has a pull-out portion 81 extending outside the heat shrink tubing 6. The combination of the insulating bracket 3, injection molding block 5, insulating tape 7, and heat shrink tubing 6 achieves complete insulation protection for the battery cell 1. The label 8 can effectively identify the characteristics of the battery cell 1. Adhesive is provided at the position of the label 8 corresponding to the heat shrink tubing 6 to achieve an adhesive effect. No adhesive is provided at the pull-out portion 81 to facilitate hand pulling and replacement of the label.

[0043] The technical means disclosed in this application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A battery pack structure, characterized by, The utility model relates to a battery pack structure, including: Electricity core (1); Protection board (2) with electricity core (1) electric connection; Insulating support (3) is established in the axial end of electricity core (1) and is connected protection board (2), and one end of protection board (2) is stretched out and is clamped and is established in the end face of insulating support (3).

2. The battery pack structure of claim 1, wherein: Protection board (2) includes electrically connected hard board (21) and soft board (22), and hard board (21) is established in insulating support (3) and is electrically connected with electricity core (1), and soft board (22) is stretched out and is clamped and is established in the end face of insulating support (3).

3. The battery pack structure of claim 2, wherein: The end face of the insulating support (3) is provided with a receiving groove (31) adapted to the soft board (22), and the soft board (22) is stretched out of the insulating support (3) and arranged in the receiving groove (31).

4. The battery pack structure of claim 2 or 3, wherein: The end face of the insulating support (3) is provided with a pressing plate (32) corresponding to the soft board (22), and the pressing plate (32) is pressed on the circumferential edge of the soft board (22).

5. The battery pack structure of claim 2, wherein: The hard board (21) is electrically connected with the tab (11) of the electricity core (1), and an insulating sleeve (4) is sleeved on the outer periphery of the hard board (21), and the insulating sleeve (4) is provided with a relief hole (41) corresponding to the connection between the hard board (21) and the tab (11).

6. The battery pack structure of claim 1 or 2, wherein: The insulating support (3) and the electricity core (1) are connected by an injection molding block (5), and the injection molding block (5) is composed of plastic filled in the gap between the corresponding end portions of the insulating support (3), the protection board (2) and the electricity core (1).

7. The battery pack structure of claim 6, wherein: The injection molding block (5) is formed by low-temperature injection molding, and the side portion of the insulating support (3) is provided with a positioning hole (33) for positioning with an injection mold.

8. The battery pack structure of claim 6, wherein: One end of the protection board (2) stretched out of the insulating support (3) is provided with a notch (221), and the injection molding block (5) is provided with a pressing block (51) corresponding to the notch (221), and the pressing block (51) is pressed on the notch (221) and extends circumferentially.

9. The battery pack structure of claim 1, wherein: The top end side of the insulating support (3) is provided with a groove (34), and the battery pack structure is connected to an electric device through the groove (34).

10. The battery pack structure of claim 1, wherein: The axial other end portion of the electricity core (1) is sleeved with an insulating adhesive tape (7), and the side portion of the electricity core (1) is sleeved with a heat shrinkable sleeve (6), and the heat shrinkable sleeve (6) is arranged outside the insulating adhesive tape (7), and a label (8) is attached to the outside of the heat shrinkable sleeve (6), and the label (8) is provided with a pulling part (81) extending to the outside of the heat shrinkable sleeve (6).

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