Battery pack with multiple contact points on positive and negative terminals

Abstract

The invention 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 present application relates to the technical field of new energy batteries, and in particular to a battery pack having a plurality of contact points at positive and negative terminals. Background Art

[0002] The energy storage density of lithium batteries can reach 460-600Wh / kg, which is about 6-7 times that of traditional lead-acid batteries. Under the same weight or volume, lithium batteries can store more energy. The self-discharge rate of lithium batteries is low, and they can maintain a high power level even if they are not used for a long time. At the same time, lithium batteries support fast charging, which can greatly reduce charging time and improve usage efficiency. This feature makes lithium batteries have broad application prospects in electric vehicles, portable devices and other fields.

[0003] In the related art, the housing of the charging and discharging device (hereinafter referred to as the device housing) is provided with a tool-side contact element for connecting with the battery pack, and the housing of the battery pack (lower battery pack housing) is provided with a battery-side contact element on the top side for matching with the tool-side contact element. When the battery pack is connected to 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] With respect to the above-mentioned related technologies, since the battery-side contact element of the battery pack is arranged on the top side of the shell, such appearance and structural limitations result in the tool-side contact element on the device shell and the mother electrode sheet on the battery pack shell being in a single-point contact state. In the case of a small contact area, on the one hand, it may cause the battery pack to be unable to match a high-power charging and discharging device, and on the other hand, the charging and discharging stability of the battery pack is poor. Summary of the invention

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

[0006] The present application provides a battery pack with multiple contact points for positive and negative terminals, which adopts the following technical solution: A battery pack with positive and negative terminals having multiple contact points comprises a battery pack shell and a battery side contact element. A slide groove is provided on the side wall of the battery pack shell, and the battery side contact element is located in the slide groove.

[0007] By adopting the above technical solution, since the battery-side contact element is located in the slide slot, when the tool-side contact element of the charging and discharging device is connected to the battery pack, multiple points of contact can be formed along the direction of the slide slot instead of single point contact, thereby increasing the contact area, which helps to improve the current transmission efficiency and increase the power supply 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 the charging and discharging process, and extending the service life of the battery pack and the charging and discharging equipment. The traditional single-point contact method cannot withstand the high current brought by high-power charging and discharging equipment, while multi-point contact can effectively disperse the current and improve the compatibility of the battery pack, so that the battery pack can be applied to a wider range of charging and discharging equipment, improving its versatility and practicality.

[0008] Furthermore, a device housing of the charging and discharging device is provided with a rib for being inserted into the slide groove, and the rib is provided with a tool-side contact element for cooperating with the battery-side contact element.

[0009] By adopting the above technical solution, the insertion setting of the ribs and the slide groove makes the connection process between the charging and discharging equipment and the battery pack simpler and faster. You only need to align the ribs with the slide groove and insert them. There is no need for complicated alignment or adjustment steps, which improves the convenience of use. After the ribs are inserted into the slide groove, they provide additional physical support for the connection between the charging and discharging equipment and the battery pack, enhance the stability of the connection, reduce poor contact or disconnection problems caused by unstable connection, and improve the overall reliability of the system. The tool-side contact elements on the ribs and the battery-side contact elements in the slide groove can form multi-point contact, further increasing the contact area. Multi-point contact not only improves the current transmission efficiency, but also ensures the uniform distribution of current on the contact surface, reducing the risk of local overheating and wear.

[0010] Furthermore, a PCB board for installing the battery side contact element is provided in the battery pack shell, and the battery side contact element includes a positive terminal and a negative terminal symmetrically arranged on both sides of the PCB board, and the positive terminal and the negative terminal are provided with a plurality of contact points for abutting with the tool side contact element.

[0011] By adopting the above technical solution, multiple contact points are set on the positive terminal and the negative terminal to form multi-point contact with the tool side contact element, further enhancing the reliability of the electrical connection. This setting can ensure that even if some contact points fail, other contact points can still maintain stable electrical connection, thereby avoiding failure of the entire charging and discharging system. As the basis of electrical connection, the PCB board has excellent conductivity and stability, which can ensure that the electrical connection between the battery side contact elements is more reliable. The battery side contact elements (including the positive terminal and the negative terminal) are integrated on the PCB board to improve the compactness and integration of the internal structure of the battery pack, making the setting of 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 set and adjusted, the setting has strong adaptability and scalability, and the number and position of the 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.

[0012] Furthermore, the positive terminal and the negative terminal are both vertically fixedly connected to the PCB board, 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 both arranged outwards; A plurality of terminal grooves are respectively provided on opposite inner walls of the two slide grooves on both sides of the battery pack shell, the terminal grooves are arranged one by one corresponding to the contact points and are all connected to the interior of the battery pack shell, and the contact points on the positive terminal and the negative terminal are all penetrated and protruded from the terminal grooves; The two tool-side contact elements are respectively arranged along the length direction of the two ribs and respectively abut against the contact points on the positive terminal and the negative terminal.

[0013] By adopting the above technical solution, the positive terminal and the negative terminal are fixed vertically on the PCB board, and the contact points are arranged at intervals along the length direction, which increases the contact area, helps to disperse the current, and reduces the risk of single-point overload. The terminal slot allows the contact points to be exposed in an orderly and neat manner. The contact points are arranged outward and protrude from the terminal slot. They can form a closer and more stable contact with the tool-side contact elements. During the charging and discharging process, even if they are 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, and abut against each contact point on the positive terminal and the negative terminal. Ribs and tool-side contact elements of different lengths can be flexibly matched and docked with the contact points on the battery pack, so that the battery pack can adapt to charging and discharging equipment of various specifications and models.

[0014] Furthermore, the rib is provided with an installation groove for the tool side contact element to be embedded, and the side of the tool side contact element close to the positive terminal / the negative terminal is flush with the rib so as to be used to abut against each of the contact points on the positive terminal / the negative terminal.

[0015] 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, so that the tool side contact element is not easy to loosen or fall off during the charging and discharging process, 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 a high degree of accuracy when abutting against the contact point on the positive terminal or the negative terminal, improving the charging and discharging efficiency and reducing the heat and wear generated by poor contact.

[0016] Furthermore, the positive terminal and the negative terminal are both laid flat and fixedly connected to the PCB board, 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 both facing one side of the device housing; A plurality of terminal slots communicating with the interior of the battery pack housing are respectively provided in the two slide slots on both sides of the battery pack housing, each of the terminal slots is arranged in one-to-one correspondence with each of the contact points, and each of the contact points on the positive terminal and the negative terminal is penetrated and protrudes from each of the terminal slots; The two tool-side contact elements are respectively arranged along the length direction of the two ribs and respectively abut against the contact points on the positive terminal and the negative terminal.

[0017] By adopting the above technical solution, the flat-laying positive and negative terminals and the spaced contact points optimize the internal layout of the battery pack, making space utilization more efficient, not only reducing the occupied space, but also improving 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, which helps to ensure the consistency and stability of the contact. During the charging and discharging process, the contact points can be evenly stressed, reducing electrical failures caused by poor contact or uneven stress.

[0018] Furthermore, the rib is provided with a mounting groove for mounting the tool-side contact element on a side close to the battery pack shell.

[0019] By adopting the above technical solution, the mounting groove enables the tool side contact element to be more firmly mounted on the rib, reducing the risk of loosening or falling off due to vibration or external force, and helping to improve the reliability of the connection between the battery pack and the charging and discharging device. The mounting groove provides precise positioning and guidance for the tool side contact element, so that when the battery pack is docked with the charging and discharging device, the tool side contact element can accurately abut against the contact point on the battery pack shell.

[0020] Furthermore, the PCB board is provided with a signal terminal, and the battery pack housing is provided with a penetration hole for the signal terminal to penetrate; The device housing is provided with an identification plug for matching with the signal terminal.

[0021] By adopting the above technical solution, the setting of the signal terminal enables the battery pack to support the identity authentication and authorization of the charging and discharging equipment, ensuring that only legitimate devices can connect to the battery pack and perform charging and discharging operations. The signal terminal also enables the battery pack to achieve two-way communication with the device, which can not only transmit status information and power data during the charging and discharging process, but also support more complex control instructions and fault diagnosis functions, and enhance the interactivity and intelligence level between the battery pack and the device. The signal terminal also makes the battery pack more scalable, and more signal terminals can be added as needed to support more functions and protocols to meet the application requirements of different fields and scenarios.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the coordinated setting of the slide groove and the rib, and the stable mechanical connection of the tool-side contact element embedded in the rib mounting groove, the connection between the battery pack and the charging and discharging equipment is more stable and not easy to loosen or fall off due to external force or vibration. Multiple contact points are set on the battery-side contact element to form multi-point contact with the tool-side contact element. Even if some contact points fail, 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 internal structure of the battery pack, but also ensures the reliability of the electrical connection through the excellent conductivity and stability of the PCB board; 2. The combination of the slide and the 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 adding additional electrical components and functional modules, the setting can flexibly adapt to different charging and discharging requirements and equipment specifications; 3. The setting of the signal terminal enables the battery pack to support the identity authentication and authorization of the charging and discharging equipment, ensuring that only legitimate devices can be connected and charge and discharge operations can be performed. At the same time, two-way communication is realized, supporting the transmission of status information, power data, 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 sufficient expansion space. More signal terminals can be added as needed to support more functions and protocols to adapt to the application requirements of different fields and scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a battery pack with multiple contact points for the positive and negative terminals in Example 1 of the present application. Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of a battery pack with multiple contact points for the positive and negative terminals in Example 1 of the present application. Figure 2 .

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of a battery pack in Example 1 of the present application in which the positive and negative terminals have multiple contact points.

[0026] Figure 4 This is a schematic diagram of the structure of a battery pack with multiple contact points for the positive and negative terminals in Example 2 of the present application. Figure 1 .

[0027] Figure 5 This is a schematic diagram of the structure of a battery pack with multiple contact points for the positive and negative terminals in Example 2 of the present application. Figure 2 .

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of a battery pack having positive and negative terminals with multiple contact points in Example 2 of the present application.

[0029] Explanation of the reference numerals: 1. Equipment housing; 11. Rib; 12. Mounting slot; 13. Identification plug; 2. Battery pack housing; 21. Slide slot; 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

[0030] In order to make the purpose, technical solutions and advantages of this application more clear, the following is combined with Example 1, Example 2 and the attached Figure 1-6 , further details of this application are given.

[0031] Example 1 The present application embodiment discloses a battery pack having a plurality of contact points for positive and negative terminals. The charging and discharging device includes a charging device and a discharging device, wherein the discharging device needs to be provided with electric energy by the battery pack, and the charging device can replenish electric energy for the battery. Figure 1 and Figure 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 arranged inside the battery pack housing 2. The PCB board 3 is symmetrically fixedly connected with two battery side contact elements 4 on both 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 vertically fixedly connected to the PCB board 3 and symmetrically arranged on both sides.

[0032] The device housing 1 has two ribs 11 symmetrically connected to the two opposite inner walls, and the battery pack housing 2 has two symmetrically opened slide grooves 21 on both sides for the ribs 11 to be inserted and slid. In this embodiment, the device housing 1 is provided with two tool-side contact elements 5 along the length direction on the two opposite side surfaces of the two ribs 11, and the two tool-side contact elements 5 are used to abut against the positive terminal 41 and the negative terminal 42 respectively.

[0033] The positive terminal 41 and the negative terminal 42 in this embodiment have multiple bending settings, and multiple contact points 411 arranged at intervals are formed at each bending position of the positive terminal 41 and the negative terminal 42. Each contact point 411 on the positive terminal 41 and the negative terminal 42 is set outward so as to be used to abut against the corresponding tool side contact element 5.

[0034] The battery pack housing 2 has a plurality of terminal slots 22 on the two opposite side walls of the two slide slots 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 correspondingly arranged and protrude from the terminal slots 22 .

[0035] Reference Figure 3 The two ribs 11 each have a mounting groove 12 for the tool-side contact element 5 to be inserted into, and the tool-side contact element 5 is mounted in the ribs 11 through the mounting groove 12 and fixedly connected to the ribs 11. The side of the tool-side contact element 5 close 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.

[0036] Combination Figure 1 and Figure 2 In this embodiment, the PCB board 3 is further provided with two signal terminals 6 arranged at intervals between the positive terminal 41 and the negative terminal 42. The two signal terminals 6 are both vertically fixedly connected to the PCB board 3, and the battery pack housing 2 is provided with a through hole 23 for the two signal terminals 6 to pass through respectively. The device housing 1 is provided with two identification plugs 13, and the two identification plugs 13 are used to match the two signal terminals 6 respectively.

[0037] The implementation principle of a battery pack with multiple contact points of positive and negative terminals in the embodiment of the present application is as follows: the two ribs 11 of the device housing 1 play the role of positioning and fixing the battery pack housing 2. The ribs 11 are provided with mounting grooves 12 for inserting and fixing the tool side contact element 5. A PCB board 3 is installed inside the battery pack housing 2, and battery side contact elements 4 (including a positive terminal 41 and a negative terminal 42) are symmetrically fixed on both sides of the PCB board 3. The contact points 411 of the battery side contact element 4 face the outside of the battery pack housing 2. The tool side contact element 5 is located on the opposite side surfaces of the two ribs 11 of the device housing 1, and is arranged along the length direction, and is 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 in cooperation with the ribs 11 of the device housing 1 through the slide grooves 21 opened on both sides thereof to achieve 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 housing 2 abuts against the tool-side contact element 5 on the rib 11, thereby realizing a stable and efficient multi-contact electrical connection between the battery pack and the electrical device. At the same time, the two identification plugs 13 on the device housing 1 are inserted into the penetration 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 equipment, ensuring that only legitimate equipment can be connected and charge and discharge operations can be performed.

[0038] Example 2 The difference between this embodiment and the first embodiment is that the tool side contact element 5 and the battery side contact element 4 are arranged at different positions. Figure 4 and Figure 5 In this embodiment, the positive terminal 41 and the negative terminal 42 are both laid flat on the PCB board 3 and symmetrically fixedly connected to both 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 housing 1. The terminal slots 22 are opened on both sides of the battery pack housing 2 and are located on the lower inner wall of the two slide slots 21, and each contact point 411 is penetrated and protrudes from each terminal slot 22.

[0039] Reference Figure 5 and Figure 6 The mounting grooves 12 on the two ribs 11 are respectively opened on one 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 that they can abut against the positive terminal 41 / negative terminal 42.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery pack having a plurality of contact points for positive and negative terminals, characterized in that: It comprises a battery pack housing (2) and a battery side contact element (4); a slide groove (21) is provided on the side wall of the battery pack housing (2); and the battery side contact element (4) is located in the slide groove (21).

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

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

4. A battery pack having a plurality of contact points for positive and negative terminals according to claim 3, characterized in that: The positive terminal (41) and the negative terminal (42) are both vertically fixedly connected to the PCB board (3), and the contact points (411) are arranged at intervals along the length direction of the positive terminal (41) and the negative terminal (42), and the contact points (411) on the positive terminal (41) and the negative terminal (42) are both arranged outwards; A plurality of terminal grooves (22) are respectively provided on opposite inner walls of the two slide grooves (21) on both sides of the battery pack housing (2); the terminal grooves (22) are arranged in one-to-one correspondence with the contact points (411) and are all connected to the interior of the battery pack housing (2); and the contact points (411) on the positive terminal (41) and the negative terminal (42) are all penetrated and protrude from the terminal grooves (22); The two tool-side contact elements (5) are respectively arranged along the length direction of the two ribs (11) and are respectively in contact with the contact points (411) on the positive terminal (41) and the negative terminal (42).

5. A battery pack having a plurality of contact points for positive and negative terminals according to claim 4, characterized in that: The rib (11) is provided with a mounting groove (12) for the tool-side contact element (5) to be embedded therein, and a side of the tool-side contact element (5) close to the positive terminal (41) / the negative terminal (42) is flush with the rib (11) so as to be used for abutting against each of the contact points (411) on the positive terminal (41) / the negative terminal (42).

6. A battery pack having a plurality of contact points for positive and negative terminals according to claim 3, characterized in that: The positive terminal (41) and the negative terminal (42) are both arranged flat and fixedly connected to the PCB board (3); the contact points (411) are arranged at intervals along the length direction of the positive terminal (41) and the negative terminal (42); and the contact points (411) on the positive terminal (41) and the negative terminal (42) are both facing one side of the device housing (1); A plurality of terminal grooves (22) communicating with the interior of the battery pack housing (2) are respectively provided in the two slide grooves (21) on both sides of the battery pack housing (2), each of the terminal grooves (22) and each of the contact points (411) being arranged in one-to-one correspondence, and each of the contact points (411) on the positive terminal (41) and the negative terminal (42) is penetrated and protrudes from each of the terminal grooves (22); The two tool-side contact elements (5) are respectively arranged along the length direction of the two ribs (11) and are respectively in contact with the contact points (411) on the positive terminal (41) and the negative terminal (42).

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

8. A battery pack having a plurality of contact points for positive and negative terminals according to claim 2, characterized in that: The PCB board (3) is provided with a signal terminal (6), and the battery pack housing (2) is provided with a penetration hole (23) for the signal terminal (6) to penetrate; The device housing (1) is provided with an identification plug (13) for matching with the signal terminal (6).

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