Connecting structure of battery and BMS (Battery Management System) protection plate

Abstract

The utility model discloses a connecting structure of a battery and a BMS (Battery Management System) protection plate, which comprises a battery pack, a transmission lead is welded inside the battery pack, one end of the battery pack is fixedly connected with a connecting plate, the bottom end of the transmission lead is connected with the top end of the connecting plate, and a BMS protection plate main body is attached to the outer side of the connecting plate. According to the connecting structure of the battery and the BMS protection plate, under the elastic action of a spring and cooperation of a limiting block, connection between a sliding groove and a sliding block is limited, connection between a BMS protection plate body and a connecting plate is further limited in cooperation with a positioning plate and a positioning groove, multiple sets of limiting are achieved in one step, and the connecting structure is simple in structure and convenient to use. The BMS protection plate body and the connecting plate are rapidly connected and stably clamped and limited, under the elastic action of a spring, a second fixing block and a first fixing block are attached, and due to the fact that opposite magnets of a first magnet and a second magnet attract each other, splicing of the BMS protection plate body and the connecting plate is further reinforced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery protection mechanisms, in particular to a connection structure between a battery and a BMS protection plate. Background Art

[0002] Lithium battery is a kind of battery that uses lithium metal or lithium alloy as negative electrode material and non-aqueous electrolyte solution. Lithium batteries can be roughly divided into two categories: lithium metal battery and lithium ion battery. Lithium ion battery does not contain metallic lithium. Lithium batteries are connected in series and parallel to form a battery pack, which can be used on electrical equipment. Usually, the output end of the lithium battery pack is connected to a battery voltage detection module. The battery voltage detection module is mainly used to detect the output voltage of the lithium battery pack, maintain the voltage and current range of the lithium battery pack during the charging and discharging process, and prevent it from being too high or too low or abnormal current. The battery voltage detection module is integrated on the lithium battery protection board;

[0003] Chinese patent authorization announcement number CN209947927U discloses a connection structure between a lithium battery protection board and a battery pack, including a lithium battery pack, wherein the lithium battery pack is in several rows, and a connecting strip is connected in series at the extreme end of each column of the lithium battery pack, and the terminal of each connecting strip is connected to the connecting board, and the connecting strips are incorporated into the connecting board after the lithium batteries are connected in series into groups, and the groups of lithium battery packs are connected in series into a whole through the connecting board; a plug-in slot is provided on the connecting board, and a lithium battery protection board is connected to the plug-in slot, and the lithium battery protection board and the connecting board can be effectively connected through the plug-in structure between the plug pin and the socket of the plug-in slot; the utility model can effectively and quickly connect the lithium battery protection board and the lithium battery pack by adding plug-in slots and plug pins with multiple plug-in methods, and the connection port on the connecting board can realize the fast spot welding connection of the spot welding machine by providing a metal welding sheet, and the position of the lithium battery protection board is arranged according to the actual placement of the lithium battery pack, saving packaging space;

[0004] The above-mentioned prior art solution has the following shortcomings: the battery pack is connected to the protection board by means of pins and slots. Due to the lack of a limiting structure, the connection between the battery pack and the protection board becomes loose in the case of shaking, affecting the protection of the battery pack. Therefore, it is necessary to design a connection structure between the battery and the BMS protection board to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a connection structure between a battery and a BMS protection board, so as to solve the problem of lack of limit in the connection between the battery pack and the protection board proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a connection structure between a battery and a BMS protection board, comprising a battery pack, a transmission wire is welded inside the battery pack, a connecting plate is fixedly connected to one end of the battery pack, the bottom end of the transmission wire is connected to the top end of the connecting plate, a BMS protection board body is fitted on the outer side of the connecting plate, and plug-in grooves are evenly provided inside the BMS protection board body, plug-in pins are evenly welded on the bottom end of the connecting plate, and the plug-in pins are connected to the plug-in grooves, pull rods are fixedly connected to both sides of the BMS protection board body, sliders are fixedly connected to both sides of the connecting plate, and limiting grooves are evenly provided inside the sliders, and slide grooves are evenly provided inside the BMS protection board body, and the slide grooves are connected to the sliders The BMS protection board body is evenly provided with receiving grooves, and the receiving grooves are fixedly connected with springs, and one side of the spring is fixedly connected with a movable plate, and the two ends of the movable plate away from the receiving groove are respectively fixedly connected with a limit block and a positioning plate, and the limit blocks are connected to the limit grooves, and the positioning grooves are evenly provided with positioning grooves inside the connecting plate, and the positioning grooves are connected to the positioning plate, the top of the movable plate is fixedly connected with a second fixed block, and the second fixed block is adhered with a second magnet, the top of the slider is fixedly connected with a first fixed block, and the first fixed block is adhered with a first magnet, and the first magnet is connected to the second magnet, and one end of the movable plate is fixedly connected with a toggle block, and the toggle block runs through the interior of the BMS protection board body.

[0007] Preferably, the size of the cross-section of the slide groove is equal to the size of the cross-section of the slider, and the cross-section of the slide groove and the cross-section of the slider are both arranged to be trapezoidal.

[0008] Preferably, the interior of the slide groove is fixedly connected with a clamping block, the interior of the sliding block is provided with a clamping groove, and the clamping groove is connected with the clamping block.

[0009] Preferably, the size of the card slot matches the size of the card block, and the card block and the card slot are symmetrically arranged about the central axis of the battery pack.

[0010] Preferably, the cross-sectional size of the positioning plate is equal to the cross-sectional size of the positioning groove, and the positioning plate and the positioning groove are symmetrically arranged about the central axis of the battery pack.

[0011] Preferably, the top end of the limit block on the side close to the slider is arranged in an inclined shape, and the spring is always in a compressed state.

[0012] Preferably, the outer sides of the pull rods are sleeved with anti-slip sleeves, and the material of the anti-slip sleeves is silicone.

[0013] Preferably, the outer side of the connecting plate is tightly fitted with the inner side of the BMS protection plate body, and the thickness of the connecting plate is consistent with the thickness of the BMS protection plate body.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the connection structure between the battery and the BMS protection board is limitedly connected, which is convenient for disassembly;

[0015] The connection between the slide groove and the slider is limited by the elastic action of the spring and the cooperation of the limit block. The connection between the BMS protection plate body and the connecting plate is further limited by the positioning plate and the positioning groove. Multiple sets of limits are in place in one step to achieve stable engagement and limit for the quick connection between the BMS protection plate body and the connecting plate. Even if shaking occurs, the BMS protection plate body and the connecting plate are firmly connected and will not loosen without artificial external force.

[0016] Under the elastic action of the spring, the second fixing block is fitted with the first fixing block. Since the first magnet and the second magnet attract each other, the connection between the BMS protection board body and the connecting board is further reinforced, and the multiple fixing methods further strengthen the connection relationship.

[0017] The area after splicing between the connecting plate and the BMS protection plate body is increased by the snap-fit ​​connection of the sliding groove and the slider, and the stability of the connecting plate and the BMS protection plate body after the initial connection is improved. The outer side of the connecting plate is closely fitted with the inner side of the BMS protection plate body, and the size of the sliding groove section is equal to the size of the slider section. The stability of the initial connection has a certain protective effect on the pin, avoiding the shaking of the connection between the connecting plate and the BMS protection plate body, causing the pin to bend or break, and maintaining the stability of the signal transmission between the BMS protection plate body and the connecting plate;

[0018] Through the engagement between the plug slot and the pin, and the engagement between the clamping block and the slot, the two-way engagement increases the contact area, and realizes the positioning connection between the slide slot and the slider;

[0019] By moving the toggle block and the pull rod, the overall position of the movable plate can be moved to facilitate later recycling and utilization, thereby releasing the limit of multiple groups of connections and separating the BMS protection board body and the connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the partial cross section of the main body of the BMS protection board of the utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the connecting plate of the utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the limit block of the utility model;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the limit block of the utility model.

[0025] In the figure: 1. Transmission wire; 2. Connection plate; 3. Battery pack; 4. BMS protection board body; 5. Toggle block; 6. First fixed block; 7. Second fixed block; 8. Accommodating groove; 9. Spring; 10. Moving plate; 11. Positioning plate; 12. Plug-in groove; 13. Pin; 14. Positioning groove; 15. Block; 16. Slot; 17. Slide; 18. Slider; 19. Limiting groove; 20. First magnet; 21. Second magnet; 22. Limiting block; 23. Anti-slip sleeve; 24. Pull rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 5 , this utility provides the following technical solutions:

[0028] Embodiment 1: In order to solve the problem of lack of limit in the connection between the battery pack 3 and the BMS protection board body 4 in the prior art, the following solution is disclosed. For details, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5, including a battery pack 3, a transmission wire 1 is welded inside the battery pack 3, one end of the battery pack 3 is fixedly connected to a connecting plate 2, the bottom end of the transmission wire 1 is connected to the top of the connecting plate 2, a BMS protection board body 4 is fitted on the outside of the connecting plate 2, and a plug-in slot 12 is evenly provided inside the BMS protection board body 4, a pin 13 is evenly welded at the bottom end of the connecting plate 2, and the pins 13 are all connected to the plug-in slot 12, both sides of the BMS protection board body 4 are fixedly connected with a pull rod 24, both sides of the connecting plate 2 are fixedly connected with a slider 18, and the slider 18 has a limited slot 19 evenly provided inside, a slide slot 17 evenly provided inside the BMS protection board body 4, and the slide slot 17 is connected to the slider 18, the BMS protection board body 4 is evenly provided with a receiving slot 8, and the receiving slot 8 is fixedly connected with a spring 9, and one side of the spring 9 is fixedly connected with a moving plate 10, and the two ends of the moving plate 10 away from the receiving slot 8 are respectively fixedly connected to a limited block 22 and a positioning plate 11 The limit blocks 22 are all connected to the limit grooves 19, the connection plate 2 is evenly provided with positioning grooves 14, and the positioning grooves 14 are all connected to the positioning plate 11, the cross-sectional size of the chute 17 is equal to the cross-sectional size of the slider 18, and the cross-sectional sizes of the chute 17 and the slider 18 are both arranged in a trapezoidal shape; the inside of the chute 17 is fixedly connected with a clamping block 15, the inside of the slider 18 is provided with a clamping groove 16, and the clamping groove 16 is connected to the clamping block 15; the size of the clamping groove 16 matches the size of the clamping block 15, The block 15 and the slot 16 are symmetrically arranged about the central axis of the battery pack 3; the cross-sectional size of the positioning plate 11 is equal to the cross-sectional size of the positioning slot 14, and the positioning plate 11 and the positioning slot 14 are symmetrically arranged about the central axis of the battery pack 3; the top end of the limit block 22 close to the slider 18 is arranged in an inclined shape, and the spring 9 is always in a compressed state; the outer side of the connecting plate 2 is tightly fitted with the inner side of the BMS protection plate body 4, and the thickness of the connecting plate 2 is consistent with the thickness of the BMS protection plate body 4.

[0029] In this embodiment, when the battery pack 3 and the BMS protection board body 4 are connected during use, the BMS protection board body 4 is turned upward so that the outer side of the connecting plate 2 fits against the inner wall of the BMS protection board body 4, and the connection between the slide groove 17 and the slider 18, the plug-in groove 12 and the plug pin 13, and the card block 15 and the card groove 16 is realized. Under the elastic action of the spring 9, the one side of the limit block 22 is in an inclined state, and the limit block 22 and the limit groove 19, the positioning plate 11 and the positioning groove 14 are quickly plugged in to limit the BMS protection board body 4 and the inside of the connecting plate 2, so as to realize the quick connection between the BMS protection board body 4 and the battery pack 3 in one step, and the operation is simple and convenient.

[0030] Embodiment 2: This embodiment is different from the embodiment 1. While realizing the limit connection, the connection plate 2 and the BMS protection plate body 4 can be separated. Figure 1 , Figure 4 and Figure 5 As shown, the top of the movable plate 10 is fixedly connected to the second fixed block 7, and the second magnet 21 is adhered to the inside of the second fixed block 7, the top of the slider 18 is fixedly connected to the first fixed block 6, and the first magnet 20 is adhered to the inside of the first fixed block 6, the first magnet 20 is connected to the second magnet 21, one end of the movable plate 10 is fixedly connected to the toggle block 5, and the toggle block 5 passes through the inside of the BMS protection plate body 4, the outer side of the pull rod 24 is sleeved with an anti-slip cover 23, and the material of the anti-slip cover 23 is silicone.

[0031] In this embodiment, when the battery pack 3 and the BMS protection board body 4 need to be separated and recycled for reuse during use, the toggle block 5 is moved to both sides so that the limit block 22 and the limit groove 19, the positioning plate 11 and the positioning groove 14, and the first magnet 20 and the second magnet 21 are completely separated, and the limit reinforcement connection is released. By holding the anti-slip sleeve 23 downward, the slide groove 17 and the slider 18 are completely separated, thereby realizing the complete separation of the BMS protection board body 4 and the battery pack 3, facilitating their separate recycling and reuse, and improving the overall practicality.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connection structure between a battery and a BMS protection board, comprising a battery pack (3), characterized in that: A transmission wire (1) is welded inside the battery pack (3), one end of the battery pack (3) is fixedly connected to a connecting plate (2), the bottom end of the transmission wire (1) is connected to the top end of the connecting plate (2), a BMS protection board body (4) is fitted on the outside of the connecting plate (2), and plug-in slots (12) are evenly arranged inside the BMS protection board body (4), plug-in pins (13) are evenly welded on the bottom end of the connecting plate (2), and the plug-in pins (13) are all connected to the plug-in slots. (12) are connected, the two sides of the BMS protection plate body (4) are fixedly connected with pull rods (24), the two sides of the connecting plate (2) are fixedly connected with sliders (18), and the sliders (18) are evenly provided with limit grooves (19) inside, the BMS protection plate body (4) is evenly provided with slide grooves (17), and the slide grooves (17) are connected to the sliders (18), and the BMS protection plate body (4) is evenly provided with accommodating grooves (8), and the accommodating grooves The interior of the connecting plate (2) is fixedly connected with a spring (9), and one side of the spring (9) is fixedly connected with a movable plate (10), and the two ends of the movable plate (10) away from the accommodating groove (8) are respectively fixedly connected with a limiting block (22) and a positioning plate (11), and the limiting blocks (22) are connected to the limiting groove (19), and the positioning grooves (14) are evenly opened inside the connecting plate (2), and the positioning grooves (14) are connected to the positioning plate (11), and the movable plate (10) The top of the slider (18) is fixedly connected to a second fixed block (7), and a second magnet (21) is adhered to the inside of the second fixed block (7); the top of each slider (18) is fixedly connected to a first fixed block (6), and a first magnet (20) is adhered to the inside of the first fixed block (6), and the first magnet (20) is connected to the second magnet (21); one end of the movable plate (10) is fixedly connected to a toggle block (5), and the toggle block (5) passes through the inside of the BMS protection board body (4).

2. The connection structure between a battery and a BMS protection board according to claim 1, characterized in that: The size of the cross section of the slide groove (17) is equal to the size of the cross section of the slider (18), and the cross section of the slide groove (17) and the cross section of the slider (18) are both arranged to be trapezoidal.

3. The connection structure between a battery and a BMS protection board according to claim 1, characterized in that: The interior of the slide groove (17) is fixedly connected with a clamping block (15), the interior of the slide block (18) is provided with a clamping groove (16), and the clamping groove (16) is connected with the clamping block (15).

4. The connection structure between a battery and a BMS protection board according to claim 3, characterized in that: The size of the card slot (16) matches the size of the card block (15), and the card block (15) and the card slot (16) are symmetrically arranged about the central axis of the battery pack (3).

5. The connection structure between a battery and a BMS protection board according to claim 1, characterized in that: The cross-sectional size of the positioning plate (11) is equal to the cross-sectional size of the positioning groove (14), and the positioning plate (11) and the positioning groove (14) are symmetrically arranged with respect to the central axis of the battery pack (3).

6. The connection structure between a battery and a BMS protection board according to claim 1, characterized in that: The top end of the limit block (22) on the side close to the slider (18) is arranged in an inclined shape, and the spring (9) is always in a compressed state.

7. The connection structure between a battery and a BMS protection board according to claim 1, characterized in that: The outer sides of the pull rods (24) are sleeved with anti-slip sleeves (23), and the material of the anti-slip sleeves (23) is silica gel.

8. The connection structure between a battery and a BMS protection board according to claim 1, characterized in that: The outer side of the connecting plate (2) is tightly fitted with the inner side of the BMS protection plate body (4), and the thickness of the connecting plate (2) is consistent with the thickness of the BMS protection plate body (4).

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