Battery pack

Abstract

The utility model discloses a battery pack, which comprises a protective plate, at least one side edge part of the protective plate is provided with a groove, the groove is recessed in the side edge of the protective plate and penetrates through the protective plate along the thickness direction of the protective plate, and the groove is used for forming a heat dissipation channel; the protection plate comprises a first surface and a second surface which are deviated from each other, the second surface is provided with at least two conducting strips, the conducting strips are used for being connected with battery cell tabs of the battery pack, and a preset device is arranged between every two adjacent conducting strips in the first direction. The material is removed from the edge part of at least one side of the protection plate to form the protection plate with the groove, so that the size and the weight of the protection plate can be reduced, the space utilization rate of the battery pack is improved, the miniaturization and the light weight of the battery pack are facilitated, and the battery pack is particularly suitable for various compact electronic equipment. And the groove can also be used as a heat dissipation channel, so that the heat of the battery pack can be quickly dissipated, the heat dissipation efficiency is improved, and the technical problem that the heat of the battery pack is not easy to dissipate in the related technology is solved.

Description

Technical Field

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

[0002] With the rapid development of electronic information technology, battery packs are widely used in various electronic devices, and the safety and reliability of battery packs play an important role in the stable operation of electronic devices.

[0003] Currently, by integrating a protection board into the battery pack, the protection board can protect the battery pack and prevent abnormalities such as overcharging, over-discharging, or short circuits.

[0004] However, the protection board in the relevant technology occupies a large space, and the internal space utilization of the battery pack is low, making it difficult to meet the needs of electronic devices for miniaturization and lightweighting of battery packs.

[0005] Therefore, how to provide a battery pack that occupies a small space is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a battery pack that has high space utilization, small size, and light weight.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A battery pack, comprising:

[0009] A protective plate, wherein at least one edge of the protective plate is provided with a groove, the groove being recessed into the side edge of the protective plate and penetrating the protective plate along the thickness direction, the groove being used to form a heat dissipation channel;

[0010] The protection plate includes a first side and a second side that are opposite to each other. The second side is provided with at least two conductive sheets. The conductive sheets are used to connect with the battery cell tabs of the battery pack. A preset device is provided between two adjacent conductive sheets along the first direction.

[0011] Optionally, the protective plate is provided with the grooves on both sides along the first direction, so that the protective plate forms an I-shaped structure.

[0012] Optionally, the first surface is provided with a MOS device and a chip, and the distance between the MOS device and the chip is greater than or equal to 3 mm.

[0013] Optionally, the chip is located on the side of the protection board away from the MOS device, and the distance between the chip and the side of the protection board is greater than or equal to 2 mm.

[0014] Optionally, the first surface is provided with a connector, which is located on one side edge of the protective plate.

[0015] Optionally, the conductive sheet includes a positive conductive sheet and a negative conductive sheet, wherein the positive conductive sheet is used to connect to the positive output terminal of the battery cell assembly of the battery pack, and the negative conductive sheet is used to connect to the negative output terminal of the battery cell assembly;

[0016] The connector has a negative contact and a positive contact at both ends. The negative contact is close to and connected to the negative conductive plate. The positive contact is close to and connected to the MOS device. The MOS device is close to and connected to the positive conductive plate.

[0017] Optionally, the second side is further provided with a button, which is located on one side edge of the protective plate, and the distance between the button and the conductive sheet is greater than or equal to 5mm.

[0018] Optionally, the protective plate has a protrusion protruding from the edge of the protective plate on one side of the edge where the button is located, and a light-emitting device is provided on the second side, with at least a portion of the light-emitting device located on the protrusion.

[0019] Optionally, the protective plate has a first side and a second side on both sides along the second direction, the width of the first side along the second direction is greater than the width of the second side along the second direction, the button and the light-emitting device are disposed on the first side, and the connector is disposed on the second side.

[0020] Optionally, the spacing between two adjacent conductive sheets along the first direction is greater than or equal to 6 mm.

[0021] The battery pack provided by this utility model has the following beneficial effects:

[0022] A groove is provided on at least one edge of the protection plate. The groove is recessed into the side of the protection plate and penetrates the protection plate along the thickness direction. That is, material is removed from at least one edge of the protection plate to form a protection plate with a groove. Therefore, the volume of the protection plate can be reduced, the space occupied by the protection plate as a whole can be reduced, and the weight of the protection plate can be reduced. This can improve the space utilization of the battery pack, which is conducive to the miniaturization and weight reduction of the battery pack, and is especially suitable for various compact electronic devices.

[0023] In addition, since the protective plate has a groove on at least one edge, the groove can also serve as a heat dissipation channel, which helps the heat of the protective plate to dissipate quickly, thereby improving the heat dissipation efficiency and solving the technical problem that the heat of the protective plate is not easy to dissipate in related technologies.

[0024] Furthermore, a preset device is provided between two adjacent conductive sheets along the first direction, so that a portion of the preset device is located between two rows of conductive sheets on the second side of the protection plate, thereby saving space on the first side of the protection plate and leaving enough space on the first side of the protection plate to set other devices. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 A schematic diagram of the first side of the protective plate of the battery pack provided in a specific embodiment of this utility model;

[0027] Figure 2 A structural diagram to protect the second side of the plate.

[0028] Figure 3 A schematic diagram showing the layout of the various components on the second side of the protection board;

[0029] Figure 4 A schematic diagram showing the layout of the various components on the first side of the protection board;

[0030] Figure 5 This is a schematic diagram of the structure after the protection board is connected to the battery cell assembly;

[0031] Figure 6 for Figure 5 Exploded view.

[0032] Figure label:

[0033] 1-Protective plate; 11-Groove; 12-Protrusion; 13-First side; 14-Second side; 2-MOS device; 3-Chip; 4-Connector; 5-Button; 6-Conductive sheet; 7-Light-emitting device; 8-Battery cell assembly; 81-Battery cell; 82-Buffer. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0035] The core of this utility model is to provide a battery pack that has high space utilization, small size, and light weight.

[0036] This utility model embodiment provides a battery pack, which includes a protection board 1. Please refer to... Figure 1 , Figure 2 and Figure 3 The protection plate 1 has a groove 11 on at least one edge. The groove 11 penetrates the protection plate 1 along the thickness direction of the protection plate 1 and is used to form a heat dissipation channel. The protection plate 1 includes a first surface and a second surface that are opposite to each other. The second surface is provided with at least two conductive sheets 6. The conductive sheets 6 are used to connect with the battery cell tabs of the battery pack. A preset device is provided between two adjacent conductive sheets 6 along the first direction.

[0037] It should be noted that the first direction in this embodiment of the invention can be either the length direction of the protective plate 1 or the width direction of the protective plate 1; when the protective plate 1 is applied to a battery pack, the first direction can be either the width direction of the battery pack or the thickness direction of the battery pack. For ease of understanding, as follows... Figures 1-4 As shown, the direction of the line containing the X-axis is the first direction; when the second direction described below is perpendicular to the first direction, the direction of the line containing the Y-axis is the second direction.

[0038] It is understood that the structure of battery packs in related technologies is usually rectangular with uniformly sized edges. In this embodiment of the invention, a groove 11 is provided on at least one edge of the protective plate 1. The groove 11 is recessed into the side of the protective plate 1 and penetrates the protective plate 1 along the thickness direction. That is, material is removed from at least one edge of the protective plate 1 to form a protective plate 1 with a groove 11. Therefore, the volume of the protective plate 1 can be reduced, the space occupied by the protective plate 1 can be reduced, and the weight of the protective plate 1 can be reduced. This can improve the space utilization of the battery pack, which is conducive to the miniaturization and weight reduction of the battery pack, and is especially suitable for various compact electronic devices.

[0039] In addition, since the protective plate 1 has a groove 11 on at least one side edge, the groove 11 can also serve as a heat dissipation channel, which helps the heat of the protective plate 1 to dissipate quickly, thereby improving the heat dissipation efficiency and solving the technical problem that the heat of the protective plate 1 is not easy to dissipate in the related art.

[0040] Furthermore, a preset device is provided between two adjacent conductive sheets 6 along the first direction, so that a portion of the preset device is located between the two rows of conductive sheets 6 on the second side of the protection plate 1, thereby saving space on the first side of the protection plate 1 and leaving enough space on the first side of the protection plate 1 to set other devices.

[0041] It should be noted that this embodiment does not limit the specific shape, location, or number of grooves 11, as long as the location of the grooves 11 is a non-circuit layout position on the protection board 1. That is, the placement of the grooves 11 does not affect the circuit layout on the protection board 1. For example, the groove 11 can be located in the middle of any edge of the protection board 1, or at the end of any edge of the protection board 1. In other words, the groove 11 can be located at the corner where any two edges of the protection board 1 intersect. Grooves 11 can be provided on one edge of the protection board 1, or on two or more edges of the protection board 1. One groove 11 can be provided on one edge of the protection board 1, or at least two grooves 11 can be provided on one edge of the protection board 1, thereby forming an irregularly shaped protection board 1.

[0042] like Figure 1 and Figure 2 As shown, in some embodiments, the protective plate 1 has grooves 11 on both sides along the first direction, so that the protective plate 1 forms an I-shaped structure.

[0043] That is, the protective plate 1 in this embodiment has a structure that is narrow in the middle and wide at both ends. While reducing the weight and volume of the protective plate 1, the parallel sides of the I-shaped structure can retain edge installation space. Moreover, the symmetry of this structure is good, which helps to ensure the balance of the overall structural strength of the protective plate 1 and is also beneficial for heat dissipation.

[0044] Further, please refer to Figure 4 In some embodiments, the first side of the protection plate 1 is provided with a MOS device 2 and a chip 3, and the distance between the MOS device 2 and the chip 3 is greater than or equal to 3mm.

[0045] It is understandable that both MOS device 2 and chip 3 are high-heat-generating components. By setting the distance between MOS device 2 and chip 3 to be greater than or equal to 3mm, sufficient safe distance is provided between the two high-heat-generating components to facilitate heat dissipation, which is beneficial to further improve the heat dissipation performance of protection board 1.

[0046] In addition, such as Figure 4 As shown, in some embodiments, the chip 3 is located on the side of the protection plate 1 away from the MOS device 2, and the distance between the chip 3 and the side of the protection plate 1 is greater than or equal to 2 mm.

[0047] In other words, in this embodiment, the chip 3 is placed on one side of the protection plate 1, so that the chip 3 is as far away from the MOS device 2 as possible, so as to ensure a safe distance between the chip 3 and the MOS device 2. At the same time, the chip 3 is at least 2mm away from the side of the protection plate 1 to avoid the chip 3 being too close to the edge of the protection plate 1, so as to ensure the reliability of the chip 3.

[0048] In some embodiments, the MOS device 2 is located near one side of the protection plate 1 along the first direction, and the chip 3 is located near the other side of the protection plate 1 along the first direction.

[0049] Furthermore, the above embodiments do not limit the specific number of MOS devices 2. For example, the number of MOS devices 2 can be four, with each pair of MOS devices 2 arranged side by side with intervals. The four MOS devices 2 are arranged in two rows, and the two rows of MOS devices 2 are staggered, for example, the two rows of MOS devices 2 are obliquely symmetrically distributed. It should be noted that there needs to be sufficient spacing between any two MOS devices 2 for heat dissipation, so as to facilitate rapid heat dissipation of large heat-generating components such as MOS devices 2.

[0050] In addition, such as Figure 4 As shown, in some embodiments, the first side of the protection plate 1 is further provided with a connector 4, which is located on one side edge of the protection plate 1.

[0051] It is understandable that in related technologies, the connector 4 is located in the central area of ​​the protection board. This layout increases the length of the current path and is prone to electromagnetic interference, affecting signal integrity. In this embodiment, the connector 4 is located on one side edge of the protection board 1, which helps to shorten the current path and reduce resistance loss.

[0052] For example, connector 4 can be located on one side edge of the protection plate 1 along the second direction, and MOS device 2 can be located on the other side edge of the protection plate 1 along the second direction. The second direction has an angle with the first direction. For example, the second direction can be perpendicular to the first direction. That is, when the first direction is the length direction of the protection plate 1, the second direction can be the width direction of the protection plate 1; when the first direction is the width direction of the protection plate 1, the second direction can be the length direction of the protection plate 1.

[0053] Furthermore, in some embodiments, the second side of the protection plate 1 is provided with a positive conductive sheet and a negative conductive sheet. The positive conductive sheet is used to connect to the positive output terminal of the battery cell assembly 8 of the battery pack, and the negative conductive sheet is used to connect to the negative output terminal of the battery cell assembly 8. The two ends of the connector 4 are respectively provided with a negative contact and a positive contact. The negative contact is close to the negative conductive sheet and connected to the negative conductive sheet. The positive contact is close to the MOS device 2 and connected to the MOS device 2. The MOS device 2 is close to the positive conductive sheet and connected to the positive conductive sheet.

[0054] In other words, in this embodiment, one end of connector 4 is provided with a negative contact and the other end with a positive contact. The positions of the positive and negative contacts are consistent with the arrangement of the positive and negative output terminals of the battery cell assembly 8, respectively. This allows the positive contact to be connected to the positive output terminal via a shorter path, and the negative contact to be connected to the negative output terminal via a shorter path. In this embodiment, the negative contact is connected to the negative conductive sheet, which facilitates the connection between the negative contact and the negative output terminal of the battery cell assembly 8. The positive contact is connected to the MOS device 2, which is connected to the positive conductive sheet, which facilitates the connection between the positive contact and the positive output terminal of the battery cell assembly 8. The negative contact is close to the negative conductive sheet, and the positive contact is close to the MOS device 2, and the MOS device 2 is close to the positive conductive sheet. This helps to form a shorter current loop, thereby reducing resistance loss, effectively reducing heat generation, and improving the stability of the protection board 1. Moreover, it also helps to reduce the influence of electromagnetic interference and improve the signal integrity of the battery system.

[0055] In addition to the MOS device 2, chip 3 and connector 4, other types of components can be arranged on the first side of the protection board 1 to facilitate integrated management of the battery.

[0056] In addition, in order to achieve a high degree of integration of more functional modules within a limited space, such as Figure 3 As shown, in some embodiments, the second side of the protective plate 1 is also provided with a button 5. The button 5 is located on one side edge of the protective plate 1, and the distance between the button 5 and the conductive sheet 6 is greater than or equal to 5mm.

[0057] In other words, the protective plate 1 in this embodiment has a dual-sided functional integrated layout. The button 5 is located on the second side of the protective plate 1, giving the protective plate 1 the function of button 5. Moreover, the button 5 is located on one edge of the protective plate 1, making it easy for personnel to press, thus ensuring the comfort of personnel pressing the button 5. In addition, the distance between the button 5 and the conductive sheet 6 is greater than or equal to 5mm, so that there is sufficient clearance between the button 5 and the conductive sheet 6, avoiding the distance between the button 5 and the conductive sheet 6 being too short. This can prevent the conductive sheet 6 from being damaged by the battery electrode tab touching the button 5 due to improper operation when connecting to the battery electrode tab, which helps to ensure the safety and reliability of the battery electrode tab.

[0058] Furthermore, such as Figure 3 As shown, in some embodiments, the protective plate 1 has a protrusion 12 protruding from the edge of the protective plate 1 on one side where the button 5 is provided, and the second side of the protective plate 1 is provided with a light-emitting device 7, at least a portion of which is provided on the protrusion 12.

[0059] In other words, in this embodiment, the second side of the protective plate 1 also integrates the function of a light-emitting device 7. The light-emitting device 7 can be an LED, and the number of LEDs can be one or at least two arranged in a row at intervals. In this embodiment, by providing a protrusion 12 on one side edge of the protective plate 1 and extending at least a portion of the light-emitting device 7 to the protrusion 12, sufficient distance is ensured between the light-emitting device 7 and the conductive sheet 6. This prevents damage to the battery electrode due to improper operation when the conductive sheet 6 is connected to the battery electrode tab, thereby further ensuring the safety and reliability of the battery electrode tab. In addition, the light-emitting device 7 and the button 5 are located on the same side edge of the protective plate 1, which helps to ensure the compactness of the protective plate 1 structure, thereby saving space.

[0060] It should be noted that the above embodiments do not specifically limit the distance by which the protrusion 12 protrudes from the edge of the protective plate 1. For example, the distance by which the protrusion 12 protrudes from the edge of the protective plate 1 can be 1 mm.

[0061] Additionally, it should be noted that the light-emitting device 7 is located on one side edge of the protection plate 1. When the protection plate 1 is connected to the battery cell assembly 8 of the battery pack and applied to the battery pack, it is beneficial to extend the light of the light-emitting device 7 to the side of the battery pack shell through the light guide column, thereby realizing status visualization.

[0062] Please combine Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the protective plate 1 has a first side 13 and a second side 14 on both sides along the second direction. The width of the first side 13 along the second direction is greater than the width of the second side 14 along the second direction. The button 5 and the light-emitting device 7 are located on the first side 13, and the connector 4 is located on the second side 14. It can be understood that the width of the first side 13 along the second direction is greater than the width of the second side 14 along the second direction. The button 5 and the light-emitting device 7 are located on the first side 13 (the button 5 and the light-emitting device 7 are located on the second side), which helps to leave enough space for the button 5 and the light-emitting device 7 on the first side 13. At the same time, the connector 4 is located on the second side 14 (the connector 4 is located on the first side), which helps to balance the overall structural strength and weight of the protective plate 1, making the structural layout compact and reasonable.

[0063] When the protective plate 1 has grooves 11 on both sides along the first direction, the protective plate 1 forms an I-shaped structure. The two parallel sides of the I-shaped structure are arranged along the second direction, and the width of one of the two sides is greater than the width of the other. That is, the two parallel sides of the protective plate 1 along the second direction are the first side 13 and the second side 14, respectively. The button 5 and the light-emitting device 7 are arranged on the first side 13 of the second surface of the protective plate 1. Furthermore, the connector 4 can be arranged on the second side 14 of the first surface of the protective plate 1.

[0064] In addition, in some embodiments, the spacing between two adjacent conductive sheets 6 along the first direction is greater than or equal to 6 mm.

[0065] It should be noted that the above embodiments do not limit the specific number of conductive sheets 6. For example, the number of conductive sheets 6 can be four, and the four conductive sheets 6 are divided into two rows along the first direction of the protective plate 1. Each row includes two conductive sheets 6, and the distance between the two rows of conductive sheets 6 along the first direction is greater than or equal to 6 mm, so that there is sufficient distance between the two rows of conductive sheets 6. This leaves a certain space between the two rows of conductive sheets 6 along the first direction of the protective plate 1, so that some preset devices can be placed between the two rows of conductive sheets 6 on the second side of the protective plate 1. This can save space on the first side of the protective plate 1, leaving enough space on the first side of the protective plate 1 to place other devices. In addition, the distance between two adjacent conductive sheets 6 along the second direction is not limited.

[0066] In addition, it should be noted that the specific materials of the conductive sheet 6, the negative conductive sheet and the positive conductive sheet are not limited in this embodiment of the utility model. For example, the conductive sheet 6, the negative conductive sheet and the positive conductive sheet can be nickel sheets, copper sheets or other conductive metal sheets.

[0067] It should be noted that the above embodiments do not limit the specific material of the protection board. In order to improve the heat dissipation effect, the protection board can be made of a material with a high thermal conductivity.

[0068] It is understandable that, such as Figure 5 As shown, the battery pack also includes a cell assembly 8, and a protection board 1 is connected to one end of the cell assembly 8. For example, the protection board 1 can be connected to one end of the cell assembly 8 by laser welding.

[0069] like Figure 6 As shown, the battery cell assembly 8 may include at least one battery cell 81 for storing electrical energy. When the number of battery cells 81 is at least two, a buffer 82 is provided between two adjacent battery cells 81. The buffer 82 may be foam or other elastic material.

[0070] Furthermore, this utility model embodiment does not limit the electronic devices that use the battery pack. For example, the electronic device can be a drone, which has high requirements for battery space utilization and strict requirements for battery quality. Therefore, the battery pack provided in this application is of great significance. It can save space on the protection board 1, reduce redundant structures on the protection board 1, and reduce its weight, thereby reducing the weight of the battery pack, improving the battery pack space utilization, and meeting the high requirements of compact electronic devices (such as drones) for battery packs.

[0071] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0072] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] The battery pack provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A battery pack, characterized by, include: A protective plate (1) has a groove (11) on at least one side edge. The groove (11) is recessed into the side edge of the protective plate (1) and extends through the protective plate (1) along the thickness direction. The groove (11) is used to form a heat dissipation channel. The protection plate (1) includes a first side and a second side facing away from each other. The second side is provided with at least two conductive sheets (6). The conductive sheets (6) are used to connect with the battery cell tabs of the battery pack. A preset device is provided between two adjacent conductive sheets (6) along the first direction.

2. The battery pack of claim 1, wherein, The protective plate (1) has grooves (11) on both sides along the first direction, so that the protective plate (1) forms an I-shaped structure.

3. The battery pack according to claim 1 or 2, characterized in that, The first surface is provided with a MOS device (2) and a chip (3), and the distance between the MOS device (2) and the chip (3) is greater than or equal to 3 mm.

4. The battery pack according to claim 3, characterized in that, The chip (3) is located on the side of the protection plate (1) away from the MOS device (2), and the distance between the chip (3) and the side of the protection plate (1) is greater than or equal to 2 mm.

5. The battery pack according to claim 3, characterized in that, The first surface is provided with a connector (4), which is located on one side edge of the protective plate (1).

6. The battery pack according to claim 5, characterized in that, The conductive sheet (6) includes a positive conductive sheet and a negative conductive sheet. The positive conductive sheet is used to connect to the positive output terminal of the battery cell assembly (8) of the battery pack, and the negative conductive sheet is used to connect to the negative output terminal of the battery cell assembly (8). The connector (4) has a negative contact and a positive contact at its two ends respectively. The negative contact is close to the negative conductive sheet and connected to the negative conductive sheet. The positive contact is close to the MOS device (2) and connected to the MOS device (2). The MOS device (2) is close to the positive conductive sheet and connected to the positive conductive sheet.

7. The battery pack according to claim 5, characterized in that, The second side is also provided with a button (5), which is located on one side edge of the protective plate (1), and the distance between the button (5) and the conductive sheet (6) is greater than or equal to 5mm.

8. The battery pack according to claim 7, characterized in that, The protective plate (1) has a protrusion (12) on one side edge of the button (5) that protrudes from the edge of the protective plate (1), and a light-emitting device (7) is provided on the second side, with at least a portion of the light-emitting device (7) located on the protrusion (12).

9. The battery pack according to claim 8, characterized in that, The protective plate (1) has a first side (13) and a second side (14) on both sides along the second direction. The width of the first side (13) along the second direction is greater than the width of the second side (14) along the second direction. The button (5) and the light-emitting device (7) are located on the first side (13), and the connector (4) is located on the second side (14).

10. The battery pack according to claim 1 or 2, characterized in that, The spacing between two adjacent conductive sheets (6) along the first direction is greater than or equal to 6 mm.

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