Battery pack having multiple contact points at positive and negative terminals

Abstract

The present application relates to the technical field of new energy batteries, and in particular relates to a battery pack having multiple contact points at positive and negative terminals. The battery pack comprises a battery pack housing, wherein sliding slots are provided on two side walls of the battery pack housing; battery-side contact elements are provided in the sliding slots; a device housing of a charging / discharging device is provided with ribs configured to be inserted into the sliding slots; and tool-side contact elements configured to match the battery-side contact elements are provided on the ribs.

Description

A battery pack with multiple contact points on the positive and negative terminals Technical Field

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

[0002] Lithium-ion batteries boast an energy density of 460-600 Wh / kg, approximately 6-7 times that of traditional lead-acid batteries, allowing them to store significantly more energy for the same weight or volume. They also exhibit low self-discharge rates, maintaining a high level of charge even after prolonged periods of inactivity. Furthermore, lithium-ion batteries support fast charging, drastically reducing charging time and improving efficiency. These characteristics make them a promising candidate for widespread application in electric vehicles, portable devices, and other fields.

[0003] In related technologies, the housing of the charging and discharging equipment (hereinafter referred to as the equipment housing) is provided with a tool-side contact element for connecting with the battery pack, and the housing of the battery pack (the lower battery pack housing) 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 to the charging and discharging equipment, the tool-side contact element is inserted into the battery-side contact element to form a closed circuit, thereby realizing the charging / discharging of the battery pack.

[0004] Regarding the aforementioned technologies, because the battery-side contact elements of the battery pack are located on the top side of the casing, these appearance and structural limitations result in the tool-side contact elements on the device housing and the mother electrode plates on the battery pack housing being in single-point contact. With a small contact area, this may lead to the battery pack being unable to be matched with high-power charging and discharging equipment, and also results in poor charging and discharging stability of the battery pack. Summary of the Invention

[0005] To address the issue of small contact area between the contact plates on the charging and discharging equipment and the electrodes and signal terminals on the battery pack, and to improve the power supply and stability of the battery pack, this application provides a battery pack with multiple contact points on the positive and negative terminals.

[0006] The battery pack with multiple contact points on the positive and negative terminals provided in this application adopts the following technical solution:

[0007] A battery pack with multiple contact points on positive and negative terminals includes a battery pack housing and battery-side contact elements. Sliding grooves are provided on both side walls of the battery pack housing, and the battery-side contact elements are located in the sliding grooves.

[0008] By adopting the above technical solution, since the battery-side contact element is located within the groove, when the tool-side contact element of the charging / discharging equipment connects to the battery pack, multi-point contact can be formed along the direction of the groove instead of single-point contact. This increases the contact area, helps improve current transmission efficiency, and increases the power output of the battery pack. A larger contact area means more stable current transmission, reducing voltage fluctuations and power losses caused by poor contact, making the battery pack more stable during charging and discharging, and extending the service life of both the battery pack and the charging / discharging equipment. Traditional single-point contact methods cannot withstand the high current brought by high-power charging and discharging equipment, while multi-point contact can effectively disperse the current, improve the compatibility of the battery pack, and make it applicable to a wider range of charging and discharging equipment, improving its versatility and practicality.

[0009] Furthermore, the charging and discharging equipment housing is provided with ribs for insertion into the slide groove, and the ribs are provided with tool-side contact elements for cooperating with the battery-side contact elements.

[0010] By adopting the above technical solution, the insertion of the ribs and grooves simplifies and speeds up the connection process between the charging / discharging equipment and the battery pack. Simply align the ribs with the grooves and insert them; no complex alignment or adjustment is required, improving ease of use. Once inserted into the grooves, the ribs provide additional physical support for the connection between the charging / discharging equipment and the battery pack, enhancing connection stability and reducing contact problems or disconnections caused by unstable connections, thus improving the overall reliability of the system. The tool-side contact elements on the ribs and the battery-side contact elements in the grooves can form multi-point contacts, further increasing the contact area. Multi-point contact not only improves current transmission efficiency but also ensures uniform current distribution on the contact surface, reducing the risk of localized overheating and wear.

[0011] Furthermore, the battery pack housing is provided with a PCB board for mounting the battery-side contact element. The battery-side contact element includes a positive terminal and a negative terminal symmetrically arranged on both sides of the PCB board. Both the positive terminal and the negative terminal are provided with multiple contact points for abutting against the tool-side contact element.

[0012] By adopting the above technical solution, multiple contact points are set on the positive and negative terminals to form multi-point contact with the tool-side contact elements, further enhancing the reliability of the electrical connection. This setup ensures that even if some contact points fail, other contact points can still maintain a stable electrical connection, thereby preventing the entire charging and discharging system from failing. The PCB board, as the foundation of the electrical connection, possesses excellent conductivity and stability, ensuring more reliable electrical connections between battery-side contact elements. Integrating battery-side contact elements (including the positive and negative terminals) onto the PCB board improves the compactness and integration of the battery pack's internal structure, making the entire battery pack setup more modular and standardized, facilitating production, assembly, and maintenance, and reducing manufacturing costs and complexity. Because the battery-side contact elements on the PCB board can be flexibly set and adjusted, this setup has strong adaptability and scalability. The number and position of contact points can be adjusted according to different charging and discharging requirements and equipment specifications, or additional electrical components and functional modules can be added.

[0013] Furthermore, both the positive terminal and the negative terminal are vertically fixed to the PCB board, and each of the contact points is arranged at intervals along the length direction of the positive terminal and the negative terminal, with each contact point facing the outside of the battery pack housing.

[0014] Multiple terminal slots are provided on the inner walls of the two sliding grooves on both sides of the battery pack housing. Each terminal slot corresponds to a contact point and is connected to the interior of the battery pack housing. Each contact point on the positive terminal and the negative terminal passes through and protrudes from each terminal slot.

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

[0016] By adopting the above technical solution, the positive and negative terminals are vertically fixed on the PCB board, and the contact points are arranged at intervals along the length of the positive / negative terminals, increasing the contact area, which helps to disperse current and reduce the risk of single-point overload. The terminal slots allow the contact points to be exposed in an orderly and neat manner. The contact points are positioned outwards and protrude from the terminal slots, enabling them to form a tighter and more stable contact with the tool-side contact elements. During charging and discharging, even under certain external forces or vibrations, the contact points can maintain good contact with the tool-side contact elements, thus ensuring the stability of the electrical connection. The two tool-side contact elements are arranged along the length of the ribs and abut against the contact points on the positive and negative terminals. Ribs of different lengths and tool-side contact elements can be flexibly matched and connected with the contact points on the battery pack, allowing the battery pack to adapt to various specifications and models of charging and discharging equipment.

[0017] Furthermore, the rib has a mounting groove for embedding the tool-side contact element, and the side of the tool-side contact element near the positive terminal / negative terminal is flush with the rib to abut against each of 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, forming a stable mechanical connection. This makes the tool-side contact element less prone to loosening or falling off during charging and discharging, thus improving the stability of the connection. The tool-side contact element is flush with the rib, ensuring high precision when it abuts against the contact points on the positive or negative terminals, improving charging and discharging efficiency, and reducing heat and wear caused by poor contact.

[0019] Furthermore, both the positive and negative terminals are laid flat and fixedly connected to the PCB board, and each contact point is arranged at intervals along the length direction of the positive and negative terminals. The contact points on the positive and negative terminals are all arranged facing one side of the device housing.

[0020] On both sides of the battery pack housing, multiple terminal slots communicating with the interior of the battery pack housing are respectively opened in the two sliding grooves. Each terminal slot is arranged in a one-to-one correspondence with each contact point. Each contact point on the positive terminal and the negative terminal passes through and protrudes from each terminal slot.

[0021] The two tool-side contact elements are arranged along the length of the two ribs and respectively abut against the contact points on the positive and negative terminals.

[0022] By adopting the above technical solution, the flat arrangement of the positive and negative terminals and the spaced-out contact points optimize the internal layout of the battery pack, making space utilization more efficient. This not only reduces the space occupied but also increases the density and efficiency of electrical connections. All contact points face one side of the device housing and form face-to-face contact with the tool-side contact elements, helping to ensure contact consistency and stability. During charging and discharging, the contact points can be evenly stressed, reducing electrical faults caused by poor contact or uneven stress.

[0023] Furthermore, the rib has a mounting groove on the side near the battery pack housing for mounting the tool-side contact element.

[0024] By adopting the above technical solution, the mounting groove allows the tool-side contact element to be more securely installed on the ribs, reducing the risk of loosening or falling off due to vibration or external forces, and helping to improve the reliability of the connection between the battery pack and the charging and discharging equipment. The mounting groove provides precise positioning and guidance for the tool-side contact element, enabling it to accurately abut against the contact points on the battery pack housing when the battery pack is docked with the charging and discharging equipment.

[0025] Furthermore, the PCB board is provided with signal terminals, and the battery pack housing is provided with through holes for the signal terminals to pass through;

[0026] The device housing is provided with an identification insert for cooperating with the signal terminal.

[0027] By adopting the above technical solution, the signal terminals enable the battery pack to support authentication and authorization of charging and discharging devices, ensuring that only legitimate devices can connect to the battery pack and perform charging and discharging operations. The signal terminals also enable bidirectional communication between the battery pack and the device, allowing the transmission of status information and power data during charging and discharging, as well as supporting more complex control commands and fault diagnosis functions, enhancing the interactivity and intelligence level between the battery pack and the device. Furthermore, the signal terminals give the battery pack greater scalability, allowing for the addition of more signal terminals as needed to support more functions and protocols, adapting to the application needs of different fields and scenarios.

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

[0029] 1. The combination of sliding grooves and ribs, along with the secure mechanical connection of the tool-side contact element embedded in the rib mounting groove, makes the connection between the battery pack and the charging / discharging equipment more stable and less prone to loosening or detachment due to external forces or vibrations. Multiple contact points are set on the battery-side contact element, forming multi-point contact with the tool-side contact element. Even if some contact points fail, the other contact points can still maintain a stable electrical connection. Integrating the battery-side contact element on the PCB board not only improves the compactness and integration of the battery pack's internal structure but also ensures the reliability of the electrical connection through the excellent conductivity and stability of the PCB board.

[0030] 2. The combination of the chute and rib simplifies the connection process between the battery pack and the charging and discharging equipment, making the operation faster and more convenient. By adjusting the number and position of the contact points, or by adding additional electrical components and functional modules, this design can flexibly adapt to different charging and discharging requirements and equipment specifications.

[0031] 3. The signal terminals enable the battery pack to support authentication and authorization of charging and discharging devices, ensuring that only legitimate devices can connect and perform charging and discharging operations. They also enable bidirectional communication, supporting status information, power data transmission, and complex control commands and fault diagnosis functions. This enhances the interactivity and intelligence between devices. The two signal terminals not only meet current application needs but also reserve sufficient expansion space, allowing for the addition of more signal terminals as needed to support more functions and protocols, adapting to application requirements in different fields and scenarios. Attached Figure Description

[0032] Figure 1 is an exploded view of the structure of a battery pack with multiple contact points on the positive and negative terminals in Embodiment 1 of this application.

[0033] Figure 2 is an exploded view of the structure of the battery pack with multiple contact points on the positive and negative terminals in Embodiment 1 of this application.

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

[0035] Figure 4 is an exploded view of the structure of a battery pack with multiple contact points on the positive and negative terminals in Embodiment 2 of this application.

[0036] Figure 5 is a second exploded view of the structure of the battery pack with multiple contact points on the positive and negative terminals in Embodiment 2 of this application.

[0037] Figure 6 is a cross-sectional schematic diagram of a battery pack with multiple contact points on the positive and negative terminals in Embodiment 2 of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Equipment housing; 11. Rib; 12. Mounting groove; 13. Identification insert; 2. Battery pack housing; 21. Slide groove; 22. Terminal groove; 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 Implementation

[0039] To make the purpose, technical solution and advantages of this application clearer, the following describes this application in further detail with reference to Embodiment 1, Embodiment 2 and Figures 1-6.

[0040] Example 1

[0041] This application discloses a battery pack with multiple contact points on the positive and negative terminals. The charging and discharging device includes a charging device and a discharging device, wherein the discharging device requires power from the battery pack, and the charging device can replenish the battery with power. Referring to Figures 1 and 2, the charging and discharging device has a device housing 1, and the battery pack includes a battery pack housing 2 and a PCB board 3 disposed inside the battery pack housing 2. Two battery-side contact elements 4 are symmetrically fixedly connected to both sides of the PCB board 3, one of which is a positive terminal 41, and the other is a negative terminal 42. Both the positive terminal 41 and the negative terminal 42 are vertically fixedly connected to the PCB board 3 and symmetrically placed on both sides.

[0042] The device housing 1 has two ribs 11 symmetrically and integrally connected to its two opposite inner walls. The battery pack housing 2 has two symmetrically formed grooves 21 on both sides for inserting and sliding the ribs 11. In this embodiment, two tool-side contact elements 5 are provided along the length direction on the opposite side surfaces of the two ribs 11 of the device housing 1. The two tool-side contact elements 5 are respectively used to abut against the positive terminal 41 and the negative terminal 42.

[0043] In this embodiment, both the positive terminal 41 and the negative terminal 42 have multiple bends. At each bend of the positive terminal 41 and the negative terminal 42, multiple contact points 411 are formed at intervals. Each contact point 411 on the positive terminal 41 and the negative terminal 42 is arranged facing the outside of the battery pack housing, so as to abut against the corresponding tool-side contact element 5.

[0044] The battery pack housing 2 has several terminal slots 22 on the two opposite side walls of the two sliding grooves 21. The terminal slots 22 are arranged at intervals and are interconnected with the interior of the battery pack housing 2. The contact points 411 on the positive terminal 41 and the negative terminal 42 are respectively inserted through and protrude from the terminal slots 22.

[0045] Referring to Figure 3, each of the two ribs 11 has a mounting groove 12 for embedding the tool-side contact element 5. The tool-side contact element 5 is installed in the rib 11 through the mounting groove 12 and is fixedly connected to the rib 11. The side of the tool-side contact element 5 closest to the battery-side contact element 4 is flush with the rib 11, so that it can abut against the battery-side contact element 4.

[0046] Referring to Figures 1 and 2, in this embodiment, the PCB board 3 is further provided with two spaced-apart signal terminals 6 between the positive terminal 41 and the negative terminal 42. Both signal terminals 6 are vertically fixed to the PCB board 3. The battery pack housing 2 has through holes 23 for the two signal terminals 6 to pass through. The device housing 1 is provided with two identification inserts 13, which are used to cooperate with the two signal terminals 6 respectively.

[0047] The implementation principle of a battery pack with multiple contact points on the positive and negative terminals according to an embodiment of this application is as follows: Two ribs 11 of the device housing 1 serve to position and fix the battery pack housing 2. Mounting grooves 12 are provided on the ribs 11 for inserting and fixing tool-side contact elements 5. A PCB board 3 is installed inside the battery pack housing 2, and battery-side contact elements 4 (including positive terminals 41 and negative terminals 42) are symmetrically fixed on both sides of the PCB board 3. The contact points 411 of the battery-side contact elements 4 are arranged facing outwards from the battery pack housing 2. The tool-side contact elements 5 are located on opposite sides of the two ribs 11 of the device housing 1, arranged along the length direction, and are used to abut against each contact point 411 of the positive terminal 41 and the negative terminal 42 to achieve electrical connection. The battery pack housing 2 is installed by engaging with the ribs 11 of the device housing 1 through sliding grooves 21 on both sides, achieving initial 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 housing 2 abuts against the tool-side contact element 5 on the rib 11, thereby achieving a stable and efficient multi-contact electrical connection between the battery pack and the electrical equipment. Simultaneously, the two identification inserts 13 on the equipment housing 1 are inserted one-to-one into the through holes 23 and contact the signal terminals 6, enabling the battery pack to support authentication and authorization of charging and discharging devices, ensuring that only legitimate devices can perform connection and charging / discharging operations.

[0048] Example 2

[0049] The difference between this embodiment and Embodiment 1 lies in the different positions of the tool-side contact element 5 and the battery-side contact element 4. Referring to Figures 4 and 5, in this embodiment, both the positive terminal 41 and the negative terminal 42 are laid flat on the PCB board 3 and symmetrically fixed to both sides of the PCB board 3. Each contact point 411 on the positive terminal 41 and the negative terminal 42 is positioned facing the side of the device housing 1. Terminal slots 22 are formed on both sides of the battery pack housing 2 and are located on the lower inner wall of the two sliding grooves 21. Each contact point 411 passes through and protrudes from each terminal slot 22.

[0050] Referring to Figures 5 and 6, the mounting grooves 12 on the two ribs 11 are respectively opened on one side near the battery pack housing 2. The two tool-side contact elements 5 are fixedly connected to the corresponding ribs 11 through the mounting grooves 12, so that they can abut against the positive terminal 41 / negative terminal 42.

[0051] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A battery pack with multiple contact points on the positive and negative terminals, characterized in that: It includes a battery pack housing (2) and a battery side contact element (4). The battery pack housing (2) has grooves (21) on both sides of its sidewalls, and the battery side contact element (4) is located in the grooves (21).

2. A battery pack with multiple contact points on the positive and negative terminals according to claim 1, characterized in that: The charging and discharging equipment housing (1) is provided with a rib (11) for insertion into the slide groove (21), and the rib (11) is provided with a tool side contact element (5) for cooperating with the battery side contact element (4).

3. A battery pack with multiple contact points on the positive and negative terminals according to claim 2, characterized in that: The battery pack housing (2) is provided with a PCB board (3) for mounting the battery side contact element (4). The battery side contact element (4) includes a positive terminal (41) and a negative terminal (42) symmetrically arranged on both sides of the PCB board (3). Both the positive terminal (41) and the negative terminal (42) are provided with multiple contact points (411) for abutting against the tool side contact element (5).

4. A battery pack with multiple contact points on the positive and negative terminals according to claim 3, characterized in that: The positive terminal (41) and the negative terminal (42) are both vertically fixed to the PCB board (3). Each contact point (411) is arranged at intervals along the length direction of the positive terminal (41) and the negative terminal (42), and each contact point (411) is set towards the outside of the battery pack housing (2). On both sides of the battery pack housing (2), a plurality of terminal slots (22) are provided on the opposite inner walls of the two sliding grooves (21). The terminal slots (22) are provided one-to-one with each of the contact points (411) and are all connected to the interior of the battery pack housing (2). Each of the contact points (411) on the positive terminal (41) and the negative terminal (42) passes through and protrudes from each of the terminal slots (22). The two tool-side contact elements (5) are arranged along the length of the two ribs (11) and abut against the contact points (411) on the positive end (41) and the negative end (42) respectively.

5. A battery pack with multiple contact points on the positive and negative terminals according to claim 4, characterized in that: The rib (11) has a mounting groove (12) for embedding the tool-side contact element (5). The side of the tool-side contact element (5) near the positive terminal (41) / the negative terminal (42) is flush with the rib (11) to abut against each of the contact points (411) on the positive terminal (41) / the negative terminal (42).

6. A battery pack with multiple contact points on the positive and negative terminals according to claim 3, characterized in that: The positive terminal (41) and the negative terminal (42) are both laid flat and fixedly connected to the PCB board (3). Each contact point (411) is arranged at intervals along the length direction of the positive terminal (41) and the negative terminal (42). The contact points (411) on the positive terminal (41) and the negative terminal (42) are all arranged facing the side of the device housing (1). On both sides of the battery pack housing (2), a plurality of terminal slots (22) communicating with the interior of the battery pack housing (2) are respectively provided in the two sliding grooves (21). Each terminal slot (22) is correspondingly provided with each contact point (411). Each contact point (411) on the positive terminal (41) and the negative terminal (42) passes through and protrudes from each terminal slot (22). The two tool-side contact elements (5) are arranged along the length of the two ribs (11) and abut against the contact points (411) on the positive end (41) and the negative end (42) respectively.

7. A battery pack with multiple contact points on the positive and negative terminals according to claim 6, characterized in that: The rib (11) has a mounting groove (12) on the side near the battery pack housing (2) for mounting the tool-side contact element (5).

8. A battery pack with multiple contact points on the positive and negative terminals according to claim 2, characterized in that: The PCB board (3) is provided with signal terminals (6), and the battery pack housing (2) is provided with through holes (23) for the signal terminals (6) to pass through; The device housing (1) is provided with an identification insert (13) for cooperating with the signal terminal (6).

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