Battery pack with multiple contact points on positive and negative terminals

Abstract

The utility model relates to the technical field of new energy batteries, in particular to a battery pack with a plurality of contact points on positive and negative terminals, which comprises a battery pack shell, a sliding chute is formed in the side wall of the battery pack shell, a battery side contact element is arranged in the sliding chute, and the battery side contact element is arranged in the sliding chute. A rib used for being inserted into the sliding groove is arranged on an equipment shell of the charging and discharging equipment, and a tool side contact element used for being matched with the battery side contact element is arranged on the rib. The charging and discharging device has the advantages that the problem that the contact area of the contact piece on the charging and discharging device and the pole piece and the signal terminal on the battery pack is small is solved, and the power supply power and the power supply stability of the battery pack are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of new energy batteries, and in particular to a battery pack with multiple contact points of positive and negative terminals. BACKGROUND

[0002] The energy storage density of a lithium battery can reach 460-600 Wh / kg, which is about 6-7 times that of a traditional lead-acid battery. With the same weight or volume, a lithium battery can store more energy. The self-discharge rate of a lithium battery is relatively low, and a high power can be maintained for a long time without use. Meanwhile, a lithium battery supports fast charging, which can greatly reduce the charging time and improve the use efficiency. This feature makes the lithium battery have a wide application prospect in the fields of electric vehicles and portable devices.

[0003] In the related art, the shell of the charging and discharging device (hereinafter referred to as the device shell) is provided with a tool-side contact element for connecting with the battery pack. The shell of the battery pack (hereinafter referred to as the battery pack shell) is provided with a battery-side contact element on the top side for cooperating with the tool-side contact element. When the battery pack is connected with the charging and discharging device, the tool-side contact element is inserted into the battery-side contact element to form a closed loop, thereby realizing the charging / discharging of the battery pack.

[0004] In view of the above related art, since the battery-side contact element of the battery pack is arranged on the top side of the shell, the appearance and structure limit the tool-side contact element on the device shell to be in single-point contact with the female pole piece on the battery pack shell. In the case of a small contact area, on the one hand, it may not be possible to match the battery pack with a charging and discharging device with a large power, and on the other hand, the charging and discharging stability of the battery pack is poor. UTILITY MODEL CONTENTS

[0005] In order to improve the problem of small contact area between the contact piece on the charging and discharging device and the pole piece and signal terminal on the battery pack, and to improve the power supply power and stability of the battery pack, the application provides a battery pack with multiple contact points of positive and negative terminals.

[0006] The battery pack with multiple contact points of positive and negative terminals provided by the application adopts the following technical scheme:

[0007] The battery pack with multiple contact points of positive and negative terminals comprises a battery pack shell and a battery-side contact element. A sliding groove is formed in the side wall of the battery pack shell, and the battery-side contact element is located in the sliding groove.

[0008] By adopting the above technical solutions, when the tool side contact element of the charging and discharging equipment is connected with the battery pack, the battery side contact element is located in the sliding groove, and multiple-point contact instead of single-point contact can be formed along the direction of the sliding groove, thereby increasing the contact area, helping to improve the current transmission efficiency and increase the power supply power of the battery pack. A larger contact area means more stable current transmission, reduces voltage fluctuations and power loss caused by poor contact, makes the battery pack more stable during charging and discharging, and prolongs the service life of the battery pack and the charging and discharging equipment. The traditional single-point contact method cannot withstand the high current of the high-power charging and discharging equipment, while the multiple-point contact can effectively disperse the current, improve the compatibility of the battery pack, and make the battery pack applicable to a wider range of charging and discharging equipment, thereby improving its versatility and practicality.

[0009] Further, the device shell of the charging and discharging equipment is provided with a rib for insertion into the sliding groove, and the rib is provided with a tool side contact element for cooperating with the battery side contact element.

[0010] By adopting the above technical solutions, the insertion of the rib and the sliding groove makes the connection process of the charging and discharging equipment and the battery pack more convenient and fast, and only needs to align the rib with the sliding groove and insert it, without the need for complex alignment or adjustment steps, thereby improving the convenience of use. After the rib is inserted into the sliding groove, additional physical support is provided for the connection between the charging and discharging equipment and the battery pack, thereby enhancing the stability of the connection and reducing the problem of poor contact or disconnection caused by unstable connection, thereby improving the overall reliability of the system. The tool side contact element on the rib and the battery side contact element in the sliding groove can form multiple-point contact, further increasing the contact area. Multiple-point contact not only improves the current transmission efficiency, but also ensures the uniform distribution of current on the contact surface, thereby reducing the risk of local overheating and wear.

[0011] Further, the battery pack shell is provided with a PCB board for mounting the battery side contact element, and the battery side contact element includes positive and negative terminals symmetrically arranged on both sides of the PCB board. The positive and negative terminals are each provided with a plurality of contact points for abutting with the tool side contact element.

[0012] By adopting the above technical solution, multiple contact points are arranged on the positive and negative terminals, and multiple-point contact is formed with the tool-side contact elements, further enhancing the reliability of the electrical connection. This arrangement can ensure that even if some contact points fail, other contact points can still maintain stable electrical connection, thereby avoiding the failure of the entire charging and discharging system. The PCB board, as the basis of electrical connection, has excellent conductivity and stability, ensuring more reliable electrical connection between the battery-side contact elements. Integrating the battery-side contact elements (including the positive and negative terminals) on the PCB board improves the compactness and integration of the internal structure of the battery pack, making the entire battery pack more modular and standardized, facilitating production, assembly, and maintenance, and reducing manufacturing costs and complexity. Since the battery-side contact elements on the PCB board can be flexibly arranged and adjusted, this arrangement has strong adaptability and scalability, allowing the number and position of contact points to be adjusted or additional electrical elements and functional modules to be added according to different charging and discharging requirements and equipment specifications.

[0013] Further, the positive and negative terminals are both vertically fixedly connected to the PCB board, and the contact points are arranged at intervals along the length direction of the positive and negative terminals, and the contact points on the positive and negative terminals are all outwardly arranged;

[0014] The battery pack shell has multiple terminal grooves on the opposite inner walls of the two sliding grooves, the terminal grooves are arranged one-to-one corresponding to the contact points and are in communication with the interior of the battery pack shell, and the contact points on the positive and negative terminals are all arranged through the terminal grooves and protrude from the terminal grooves.

[0015] The two tool-side contact elements are arranged along the length direction of the two ribs respectively and abut against the contact points on the positive and negative terminals respectively.

[0016] By adopting the above technical solution, the positive and negative terminals are vertically fixed to the PCB board, and the contact points are arranged at intervals along the length direction, improving the contact area and helping to disperse the current and reduce the risk of single-point overload. The terminal grooves allow the contact points to be orderly and neatly exposed, and the contact points are outwardly arranged and protrude from the terminal grooves, which can form a more intimate and stable contact with the tool-side contact elements. During the charging and discharging process, even if subjected to certain external forces or vibrations, the contact points can maintain good contact with the tool-side contact elements, thereby ensuring the stability of the electrical connection. The two tool-side contact elements are arranged along the length direction of the ribs respectively and abut against the contact points on the positive and negative terminals. Different lengths of ribs and tool-side contact elements can be flexibly matched and docked with the contact points on the battery pack, allowing the battery pack to adapt to charging and discharging equipment of various specifications and models.

[0017] Further, the rib is provided with a mounting groove for embedding the tool-side contact element, and the tool-side contact element is flush with the rib on the side close to the positive terminal / negative terminal for abutting the contact points on the positive terminal / negative terminal.

[0018] By adopting the above technical solution, the tool-side contact element is embedded in the mounting groove of the rib to form a stable mechanical connection, so that the tool-side contact element is not easy to loosen or fall off during charging and discharging, and the stability of the connection is improved. The tool-side contact element and the rib are flush with each other, so that they can maintain high precision when abutting the contact points on the positive terminal or negative terminal, improve the charging and discharging efficiency, and reduce heat and wear caused by poor contact.

[0019] Further, the positive terminal and the negative terminal are arranged in a flat manner and fixedly connected to the PCB board, and the contact points are arranged at intervals along the length direction of the positive terminal and the negative terminal, and the contact points on the positive terminal and the negative terminal are all directed to one side of the device shell.

[0020] The battery pack shell is provided with a plurality of terminal grooves in communication with the interior of the battery pack shell on both sides of the two sliding grooves, and each terminal groove is provided in one-to-one correspondence with each contact point, and each contact point on the positive terminal and the negative terminal is arranged in each terminal groove.

[0021] The two tool-side contact elements are arranged along the length direction of the two ribs and abut each contact point on the positive terminal and the negative terminal, respectively.

[0022] By adopting the above technical solution, the flatly arranged positive terminal and negative terminal and the interval arranged contact points optimize the layout of the battery pack interior, making the space utilization more efficient, not only reducing the occupied space, but also improving the density and efficiency of electrical connection. All the contact points are directed to one side of the device shell and form a face-to-face contact with the tool-side contact element, which helps to ensure the consistency and stability of the contact. During charging and discharging, the contact points can be uniformly stressed, reducing electrical faults caused by poor contact or uneven stress.

[0023] Further, the rib is provided with a mounting groove for embedding the tool-side contact element, and the tool-side contact element is flush with the rib on the side close to the positive terminal / negative terminal for abutting the contact points on the positive terminal / negative terminal.

[0024] By adopting the technical scheme, the installation groove enables the tool-side contact element to be more stably installed on the rib, reduces the risk of loosening or falling off due to vibration or external force, and helps to improve the reliability of the connection between the battery pack and the charging and discharging equipment. The installation groove provides accurate positioning and guidance for the tool-side contact element, so that the tool-side contact element can accurately abut against the contact point on the battery pack shell when the battery pack and the charging and discharging equipment are docked.

[0025] Further, the PCB is provided with a signal terminal, and the battery pack shell is provided with a through hole for the signal terminal to pass through;

[0026] The equipment shell is provided with an identification insert sheet for cooperating with the signal terminal.

[0027] By adopting the technical scheme, the signal terminal enables the battery pack to support the identity verification and authorization of the charging and discharging equipment, ensuring that only legal equipment can be connected with the battery pack and perform charging and discharging operations. The signal terminal also enables the battery pack to realize bidirectional communication with the equipment, which can not only transmit state information, power data and the like during the charging and discharging process, but also support more complex control instructions and fault diagnosis functions, thereby enhancing the interactivity and intelligent level between the battery pack and the equipment. The signal terminal also enables the battery pack to have stronger expansibility, and more signal terminals can be added as needed to support more functions and protocols, so as to adapt to application requirements in different fields and scenarios.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. By the cooperation of the sliding groove and the rib, and the stable mechanical connection of the tool-side contact element embedded in the installation groove of the rib, the connection between the battery pack and the charging and discharging equipment is more stable and is not prone to loosening or falling off due to external force or vibration. The plurality of contact points on the battery-side contact element form a multi-point contact with the tool-side contact element, so that even if some contact points fail, other contact points can still maintain stable electrical connection. Integrating the battery-side contact element on the PCB not only improves the compactness and integration of the internal structure of the battery pack, but also ensures the reliability of the electrical connection through the excellent conductivity and stability of the PCB.

[0030] 2. The cooperation of the sliding groove and the rib simplifies the connection process of the battery pack and the charging and discharging equipment, making the operation more convenient and fast. By adjusting the number and position of the contact points, or adding additional electrical elements and functional modules, this setting can flexibly adapt to different charging and discharging requirements and equipment specifications.

[0031] 3. The arrangement of signal terminals enables the battery pack to support the authentication and authorization of charging and discharging devices, ensuring that only legitimate devices can be connected and charged, while enabling two-way communication, supporting state information, power data transmission, and complex control instructions and fault diagnosis functions, enhancing the interactivity and intelligence level between devices. The two signal terminals not only meet the current application requirements, but also reserve enough expansion space, allowing more signal terminals to be added to support more functions and protocols, adapting to different fields and scene application requirements. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural explosion schematic of a battery pack with multiple contact points for positive and negative terminals in Embodiment 1 of the present application Figure 1 .

[0033] Figure 2 is a structural explosion schematic of a battery pack with multiple contact points for positive and negative terminals in Embodiment 1 of the present application Figure 2 .

[0034] Figure 3 is a cross-sectional structural schematic of a battery pack with multiple contact points for positive and negative terminals in Embodiment 1 of the present application.

[0035] Figure 4 is a structural explosion schematic of a battery pack with multiple contact points for positive and negative terminals in Embodiment 2 of the present application Figure 1 .

[0036] Figure 2 is a structural explosion schematic of a battery pack with multiple contact points for positive and negative terminals in Embodiment 2 of the present application Figure 6 .

[0037] Figures 1-6 is a cross-sectional structural schematic of a battery pack with multiple contact points for positive and negative terminals in Embodiment 2 of the present application.

[0038] Reference signs: 1, device housing; 11, rib; 12, mounting groove; 13, identification tab; 2, battery pack housing; 21, sliding groove; 22, terminal slot; 23, through hole; 3, PCB board; 4, battery side contact element; 41, positive terminal; 411, contact point; 42, negative terminal; 5, tool side contact element; 6, signal terminal. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application more clear and explicit, the following will be further described in detail in combination with Embodiment 1, Embodiment 2 and the accompanying drawings Figure 1 of the present application.

[0040] Embodiment 1

[0041] The application discloses a battery pack with multiple contact points of positive and negative terminals. The charging and discharging equipment comprises a charging device and a discharging device, wherein the discharging device needs to be supplied with electric energy by the battery pack, and the charging device can supplement electric energy for the battery. Figure 2 and Figure 3 The charging and discharging equipment has an equipment shell 1, and the battery pack comprises a battery pack shell 2 and a PCB 3 arranged in the battery pack shell 2. The PCB 3 is fixedly connected with two battery side contact elements 4 which are symmetrically arranged on two sides, one of which is a positive terminal 41, and the other is a negative terminal 42. The positive terminal 41 and the negative terminal 42 are both fixedly connected with the PCB 3 vertically and symmetrically arranged on two sides.

[0042] The equipment shell 1 is integrally connected with two ribs 11 which are symmetrically arranged on two opposite inner walls, and the battery pack shell 2 is symmetrically provided with two sliding grooves 21 on two sides for inserting and sliding the ribs 11. In the embodiment, the equipment shell 1 is provided with two tool side contact elements 5 on the length direction of the opposite sides of the two ribs 11, and the two tool side contact elements 5 are respectively used for abutting with the positive terminal 41 and the negative terminal 42.

[0043] The positive terminal 41 and the negative terminal 42 in the embodiment are both provided with multiple bending positions, and multiple contact points 411 are formed at the bending positions of the positive terminal 41 and the negative terminal 42 respectively. The contact points 411 on the positive terminal 41 and the negative terminal 42 are all outwardly arranged, so as to abut with the corresponding tool side contact elements 5.

[0044] The battery pack shell 2 is provided with a plurality of terminal grooves 22 on the opposite side walls of the two sliding grooves 21, and the terminal grooves 22 are arranged at intervals and are in communication with the inside of the battery pack shell 2. The contact points 411 on the positive terminal 41 and the negative terminal 42 are correspondingly arranged and protrude from the terminal grooves 22.

[0045] Referring to Figure 1 The two ribs 11 are respectively provided with mounting grooves 12 for embedding the tool side contact elements 5, and the tool side contact elements 5 are mounted in the ribs 11 through the mounting grooves 12 and are fixedly connected with the ribs 11. The side of the tool side contact elements 5 close to the battery side contact elements 4 is flush with the ribs 11, so as to abut with the battery side contact elements 4.

[0046] In combination with Figure 2 and Figure 4 In the embodiment, the PCB 3 is further provided with two signal terminals 6 which are arranged at intervals between the positive terminal 41 and the negative terminal 42, and the two signal terminals 6 are both fixedly connected with the PCB 3. The battery pack shell 2 is provided with two through holes 23 for respectively embedding the two signal terminals 6. The equipment shell 1 is provided with two identification plugs 13 which are respectively used for cooperating with the two signal terminals 6.

[0047] The implementation principle of the battery pack with multiple contact points in the embodiment of the application is as follows: the two ribs 11 of the device shell 1 serve to position and fix the battery pack shell 2. The mounting groove 12 is arranged on the rib 11 and used for inserting the side contact element 5 of the fixing tool. The PCB board 3 is mounted in the battery pack shell 2, and the battery side contact element 4 (including the positive terminal 41 and the negative terminal 42) is symmetrically fixed on the two sides of the PCB board 3. The contact point 411 of the battery side contact element 4 faces the outside of the battery pack shell 2. The tool side contact element 5 is located on the opposite two sides of the two ribs 11 of the device shell 1 and is arranged in the length direction, used for abutting against each contact point 411 of the positive terminal 41 and the negative terminal 42 to realize electrical connection. The battery pack shell 2 is mounted in cooperation with the ribs 11 of the device shell 1 through the sliding grooves 21 opened on the two sides of the battery pack shell 2 to realize preliminary positioning. Each contact point 411 on the battery side contact element 4 (including the positive terminal 41 and the negative terminal 42) of the battery pack shell 2 abuts against the tool side contact element 5 on the rib 11, so that stable and efficient multi-contact electrical connection between the battery pack and the electric device is realized. At the same time, the two identification plugs 13 on the device shell 1 are inserted into the through holes 23 one by one and contact the signal terminal 6, so that the battery pack can support the identity verification and authorization of the charging and discharging device, and ensure that only the legal device can be connected and charged and discharged.

[0048] Embodiment 2

[0049] The difference between the embodiment and the embodiment 1 is that the setting positions of the tool side contact element 5 and the battery side contact element 4 are different. Referring to Figure 5 and Figure 5 In the embodiment, the positive terminal 41 and the negative terminal 42 are both arranged in a flat manner on the PCB board 3 and are symmetrically fixed and connected to the two sides of the PCB board 3. Each contact point 411 on the positive terminal 41 and the negative terminal 42 faces one side of the device shell 1. The terminal groove 22 is arranged on the two sides of the battery pack shell 2 and is located on the inner wall below the two sliding grooves 21, and each contact point 411 penetrates and protrudes from each terminal groove 22.

[0050] Referring to Figure 6 and ​ The mounting grooves 12 on the two ribs 11 are respectively arranged on the side close to the battery pack shell 2, and the two tool side contact elements 5 are fixedly connected to the corresponding ribs 11 through the mounting grooves 12, so as to abut against the positive terminal 41 / negative terminal 42.

[0051] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, so that: any equivalent changes made on the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A battery pack in which positive and negative terminals have a plurality of contact points, characterized by: The battery pack shell (2) is provided with a sliding groove (21) in the side wall, and the battery side contact element (4) is located in the sliding groove (21); The device shell (1) of the charge and discharge equipment is provided with a rib (11) for inserting into the sliding groove (21), and the tool side contact element (5) is arranged on the rib (11) and matched with the battery side contact element (4); The battery pack shell (2) is provided with a PCB (3) for mounting the battery side contact element (4), the battery side contact element (4) includes positive and negative terminals (41) and (42) symmetrically arranged on both sides of the PCB (3), and a plurality of contact points (411) are arranged on the positive and negative terminals (41) and (42) and abutted with the tool side contact element (5).

2. The battery pack of claim 1, wherein: The positive and negative terminals (41) and (42) are vertically fixedly connected to the PCB (3), the contact points (411) are arranged at intervals along the length direction of the positive and negative terminals (41) and (42), and the contact points (411) on the positive and negative terminals (41) and (42) are outwardly arranged; The battery pack shell (2) is provided with a plurality of terminal grooves (22) on the opposite inner walls of the two sliding grooves (21), the terminal grooves (22) are arranged one by one corresponding to the contact points (411) and are in communication with the inside of the battery pack shell (2), and the contact points (411) on the positive and negative terminals (41) and (42) are arranged through the terminal grooves (22) and protrude from the terminal grooves (22); The tool side contact elements (5) are arranged along the length direction of the two ribs (11) and abutted with the contact points (411) on the positive and negative terminals (41) and (42) respectively.

3. The battery pack of claim 2, wherein: The rib (11) is provided with a mounting groove (12) for embedding the tool side contact element (5), and the side of the tool side contact element (5) close to the positive and negative terminals (41) and (42) is flush with the rib (11) for abutting with the contact points (411) on the positive and negative terminals (41) and (42).

4. The battery pack of claim 1, wherein: The positive and negative terminals (41) and (42) are arranged flatly and fixedly connected to the PCB (3), the contact points (411) are arranged at intervals along the length direction of the positive and negative terminals (41) and (42), and the contact points (411) on the positive and negative terminals (41) and (42) are arranged towards one side of the device shell (1). A plurality of terminal grooves (22) are formed in the two sides of the battery pack shell (2) and communicate with the interior of the battery pack shell (2), each of the terminal grooves (22) is provided in one-to-one correspondence with each of the contact points (411), and each of the contact points (411) on the positive electrode terminal (41) and the negative electrode terminal (42) penetrates and protrudes from each of the terminal grooves (22); The two tool-side contact elements (5) are arranged along the length direction of the two ribs (11) and abut against each of the contact points (411) on the positive electrode terminal (41) and the negative electrode terminal (42), respectively.

5. The battery pack of claim 4, wherein: The rib (11) is provided with a mounting groove (12) near the side of the battery pack shell (2) for mounting the tool-side contact element (5).

6. The battery pack of claim 1, wherein: The PCB board (3) is provided with a signal terminal (6), and the battery pack shell (2) is provided with a penetrating hole (23) for penetrating the signal terminal (6). The equipment shell (1) is provided with an identification plug (13) for cooperating with the signal terminal (6).

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