A battery pack with quickly replaceable single cells

Abstract

The present invention relates to the technical field of battery packs, and particularly to a battery pack capable of quickly replacing single cells. It includes cylindrical battery cells, and the cylindrical battery cells are combined into a battery pack through a battery bracket according to a series-parallel connection scheme. Both sides of the battery pack are provided with non-welding series-parallel connection covers. The battery bracket is divided into an upper bracket and a lower bracket. The upper bracket and the lower bracket are connected by a connecting rod. The battery brackets are connected through slide rails and chutes provided on the battery brackets. The present invention is provided with components such as a pressing rod, a first pulling rope, and a movable cylinder. Through the mutual cooperation of components such as the pressing rod, the first pulling rope, and the movable cylinder, the need to disassemble other unnecessary parts is reduced, the damage to surrounding batteries is reduced, the maintenance time is saved, and the maintenance efficiency of the battery pack is improved. At the same time, since the movable cylinder is used to smoothly push out the cylindrical battery cells, the risk of damage to the cylindrical battery cells can be reduced, and the damage to the surrounding cylindrical battery cells is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and particularly to a battery pack capable of quickly replacing single cells. Background Art

[0002] A battery pack is an electrical energy storage device composed of multiple single cells combined in series, parallel, or a combination of both. These single cells are encapsulated in a fixed structure and electrically connected to form an energy output unit to meet the application requirements of high voltage, large capacity, or high power. Battery packs are widely used in multiple fields, such as electric vehicles, renewable energy storage systems, and portable electronic devices.

[0003] An existing battery pack, such as the one disclosed in the patent with publication number CN204792979U, discloses a spot-welding-free battery combination bracket. Through the positive and negative brackets plugged together, it can effectively avoid damaging single cells during the production of cylindrical lithium battery packs and during battery pack maintenance. At the same time, when the bracket combination is completed, the series and parallel connections of the battery pack are achieved. However, if one or several single cells in the middle of this patent have problems, it is rather cumbersome to disassemble the positive and negative brackets in the middle. Usually, it is necessary to disassemble multiple adjacent single cells and brackets to replace the faulty single cell, which not only increases the maintenance time, making the replacement of single cells rather cumbersome, but also may damage the surrounding batteries. In view of this, the present invention proposes a battery pack capable of quickly replacing single cells to solve the above-mentioned technical problems. Summary of the Invention

[0004] To overcome the technical problems mentioned in the background art, the present invention provides a battery pack capable of quickly replacing single cells.

[0005] The technical solution of the present invention is: A battery pack capable of quickly replacing single cells, including cylindrical battery cores. The cylindrical battery cores are combined into a battery pack by battery brackets according to a series and parallel connection scheme. Both sides of the battery pack are provided with spot-welding-free series and parallel connection covers. The battery brackets are divided into an upper bracket and a lower bracket. The upper bracket and the lower bracket are connected by a connecting rod. The battery brackets are connected by sliding rails and sliding grooves provided on the battery brackets. The upper bracket is provided with a first through hole, and a boss cylinder is fixedly connected inside the first through hole. A second through hole for placing the cylindrical battery core is provided inside the boss cylinder. A movable cylinder for placing the cylindrical battery core is slidably connected inside the lower bracket, and the movable cylinder moves up and down through a driving component.

[0006] Further, the driving assembly includes a pressing plate slidably connected between the boss cylinder and the inner wall of the first through hole. The pressing plate is sleeved on the upper part of the boss cylinder. The bottom surface of the pressing plate is symmetrically fixedly connected with pressing rods. The bottom surface of the boss cylinder is symmetrically fixedly connected with fixing plates. A slider is slidably connected inside the fixing plate. The slider is located directly below the pressing rod. One end of a first pulling rope is fixedly connected to one side of the slider. The other end of the first pulling rope is wound around a guide rod and fixedly connected to the movable cylinder. A first elastic member is arranged between the pressing plate and the boss cylinder. A third elastic member is arranged between the movable cylinder and the lower bracket.

[0007] Further, a clamping assembly for clamping a cylindrical single battery is further arranged inside the boss cylinder. The clamping assembly includes fixing blocks symmetrically fixedly connected inside the second through hole. A limiting rod is rotatably connected to the fixing block. The limiting rod is inclined towards the central axis of the second through hole. A second elastic member is arranged between the limiting rod and the inner wall of the second through hole. One end of a second pulling rope is fixedly connected to one side surface of the limiting rod. The other end of the second pulling rope penetrates through the boss cylinder and is fixedly connected to the corresponding pressing rod.

[0008] Further, a clearance is provided between the pressing rod and the slider.

[0009] Further, steel balls are movably connected to the outer side wall of the boss cylinder. The steel balls are arranged up and down and clamp the second pulling rope.

[0010] Further, the non-welding series-parallel connection cover plate includes a first cover plate and a second cover plate. The first cover plate and the second cover plate are respectively arranged on both sides of the battery pack. Conductive sheets are connected to the side surfaces of the first cover plate and the second cover plate close to each other. The conductive sheets achieve series-parallel connection on the first cover plate and the second cover plate according to the series-parallel connection scheme of the battery pack. The conductive sheets are connected to the positive and negative pole caps of the cylindrical battery cells. A fourth elastic member is arranged on the back of the conductive sheet located on the first cover plate.

[0011] Further, the upper bracket and the lower bracket are regular quadrangular prisms. Slide rails and chutes are respectively arranged on the opposite side surfaces of the regular quadrangular prism. Jacks are arranged at the four corners of the upper bracket and the lower bracket. At least two legs are fixedly connected to the side surfaces of the first cover plate and the second cover plate close to each other. Anti-detachment claws are arranged at the ends of the legs. The anti-detachment claws can be inserted into the corresponding jacks.

[0012] Further, slots for facilitating the insertion of test pens are distributed on the first cover plate, the second cover plate, and the movable cylinder.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The present invention is provided with components such as a pressure rod, a slider, and a movable cylinder. When a certain cylindrical battery cell in the battery pack needs to be replaced, first, use a test pen and a multimeter to detect and mark the problematic battery cell, then press the anti-detachment claw on the first cover plate to remove the first cover plate, and then press down the corresponding pressure plate. Further, the pressure rod contacts the slider. As the pressure rod continues to be pressed down, the pressure rod pushes the slider to move downward. Further, through the action of the first pulling rope, the movable cylinder rises, and then the battery cell can be taken out. In this way, through the mutual cooperation of components such as the pressure rod, the first pulling rope, and the movable cylinder, the need to disassemble other unnecessary parts is reduced, the damage to the surrounding batteries is reduced, the maintenance time is saved, and the maintenance efficiency of the battery pack is improved. At the same time, since the movable cylinder is used to smoothly push out the cylindrical battery cell, the risk of damage to the cylindrical battery cell can be reduced, and the damage to the surrounding cylindrical battery cells is reduced.

[0015] 2. The present invention is provided with components such as a first cover plate, a second cover plate, and a conductive sheet. During use, spot welding is not required, which avoids the harm to the cylindrical battery cells during spot welding. And when the cylindrical battery cells have problems, they can be simply and conveniently replaced, avoiding damage to other good cylindrical battery cells during replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0017] Figure 2 It is a series-parallel connection schematic diagram of the present invention.

[0018] Figure 3 It is a structure schematic diagram of components such as the upper bracket, the lower bracket, and the connecting rod of the present invention.

[0019] Figure 4 It is another structure schematic diagram of components such as the upper bracket, the lower bracket, and the connecting rod of the present invention.

[0020] Figure 5 It is a cross-sectional view of components such as the upper bracket, the lower bracket, and the connecting rod of the present invention.

[0021] Figure 6 It is Figure 5 an enlarged view of part A in

[0022] Figure 7 It is a structure schematic diagram of components such as the first cover plate, the support leg, and the conductive sheet of the present invention.

[0023] Figure 8 It is a structure schematic diagram of components such as the second cover plate, the conductive sheet, and the support leg of the present invention.

[0024] Names and serial numbers of components in the figure: 101, cylindrical battery cell; 102, upper bracket; 1021, first through hole; 103, lower bracket; 1031, groove; 104, connecting rod; 1001, slide rail; 1002, chute; 1003, jack; 105, boss cylinder; 1051, second through hole; 106, movable cylinder; 201, pressing plate; 202, pressing rod; 203, fixing plate; 204, slider; 205, first pulling rope; 206, guiding rod; 207, first elastic member; 208, third elastic member; 301, fixing block; 302, limiting rod; 303, second elastic member; 304, second pulling rope; 305, steel ball; 401, first cover plate; 402, second cover plate; 403, conductive sheet; 404, fourth elastic member; 405, leg; 4051, anti-detachment claw; 4001, slot. Detailed implementation manners

[0025] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0026] A battery pack capable of quickly replacing single cells, such as Figures 1-8As shown in the figure, it includes a cylindrical battery cell 101. The cylindrical battery cells 101 are combined into a battery pack through a battery bracket according to a series-parallel connection scheme. Both the upper and lower sides of the battery pack are provided with non-welding series-parallel connection covers. The battery brackets are connected through slide rails 1001 and chutes 1002 provided on the battery brackets. In this way, there are gaps between two adjacent cylindrical battery cells 101. These gaps can serve as air circulation channels, enabling effective air circulation, and the heat can be carried away by the air. The battery bracket is divided into an upper bracket 102 and a lower bracket 103. The upper bracket 102 and the lower bracket 103 are regular quadrangular prisms. The opposite side faces of the regular quadrangular prism are respectively provided with slide rails 1001 and chutes 1002. The upper bracket 102 and the lower bracket 103 are respectively arranged at both ends of the cylindrical battery cell 101. The upper bracket 102 and the lower bracket 103 are connected through a connecting rod 104. A first through hole 1021 is provided on the upper bracket 102. A boss cylinder 105 is fixedly connected in the first through hole 1021. A second through hole 1051 for placing the cylindrical battery cell 101 is provided in the boss cylinder 105. A movable cylinder 106 for placing the cylindrical battery cell 101 is slidably connected in the lower bracket 103. The movable cylinder 106 moves up and down through a driving component. Specifically, the driving component includes a pressing plate 201 slidably connected between the inner walls of the boss cylinder 105 and the first through hole 1021. The pressing plate 201 is sleeved on the upper part of the boss cylinder 105. Pressing rods 202 are symmetrically fixedly connected to the bottom surface of the pressing plate 201. Fixing plates 203 are symmetrically fixedly connected to the bottom surface of the boss cylinder 105. Sliders 204 are slidably connected in the fixing plates 203. The sliders 204 are located directly below the pressing rods 202, and there is a clearance between the pressing rods 202 and the sliders 204. One end of a first pulling rope 205 is fixedly connected to the side of the slider 204 close to the cylindrical battery cell 101. The other end of the first pulling rope 205 is wound and fixedly connected to the movable cylinder 106 through a guide rod 206. A first elastic member 207 is provided between the pressing plate 201 and the boss cylinder 105. The first elastic member 207 is specifically a spring. A third elastic member 208 is provided between the movable cylinder 106 and the lower bracket 103. The third elastic member 208 is specifically silicone rubber. The movable cylinder 106 is in a "T" shape. A groove 1031 is provided on the lower bracket 103. The third elastic member 208 is arranged in the groove 1031. At the same time, due to the setting of the groove 1031, the third elastic member 208 is in a stretched state, so that the bottom surface of the movable cylinder 106 always remains flush with the bottom surface of the lower bracket 103. In this way, the positioning of the cylindrical battery cell 101 is more accurate, preventing poor contact.

[0027] Furthermore, a clamping assembly for clamping a cylindrical single battery is also provided inside the boss cylinder 105. The clamping assembly includes fixing blocks 301 symmetrically fixed in the second through hole 1051. A limiting rod 302 is rotatably connected to the fixing block 301. The limiting rod 302 is inclined towards the central axis of the second through hole 1051. A second elastic member 303 is arranged between the limiting rod 302 and the inner wall of the second through hole 1051. The second elastic member 303 is specifically a spring. In this way, the limiting rod 302 can firmly and tightly clamp the cylindrical battery cell 101 in the second through hole 1051, preventing the cylindrical battery cell 101 from loosening due to vibration or external force. One side of the limiting rod 302 is fixedly connected to one end of a second pulling rope 304. The other end of the second pulling rope 304 passes through the boss cylinder 105 and is fixedly connected to the corresponding pressing rod 202. Steel balls 305 are movably connected to the outer side wall of the boss cylinder 105. The steel balls 305 are arranged up and down and clamp the second pulling rope 304. In this way, when the second pulling rope 304 is pulled, the second pulling rope 304 is wound around the steel balls 305, which can prevent the second pulling rope 304 from being cut by the sharp corners of the boss cylinder 105, thereby causing the device to fail. When the second elastic member 303 is in a normal state, the second pulling rope 304 is in a straightened state.

[0028] Specifically, the spot-welding-free series-parallel cover plate includes a first cover plate 401 and a second cover plate 402. The first cover plate 401 and the second cover plate 402 are respectively arranged on both sides of the battery pack. A conductive sheet 403 is connected to the side surfaces of the first cover plate 401 and the second cover plate 402 that are close to each other. The conductive sheet 403 realizes series-parallel connection on the first cover plate 401 and the second cover plate 402 according to the series-parallel scheme of the battery pack. Circular protrusions are arranged on the conductive sheet 403, and the circular protrusions on the conductive sheet 403 are connected to the positive and negative pole caps of the cylindrical battery cell 101. In this way, spot welding is not required during use, which avoids damage to the cylindrical battery cells caused by spot welding. At the same time, the contact between the circular protrusions and the positive and negative pole caps of the battery cells can ensure a more firm and stable electrical connection, reducing the risk of poor contact or loosening. A fourth elastic member 404 is arranged on the back of the conductive sheet 403 located on the first cover plate 401. The fourth elastic member 404 is specifically a spring. The arrangement of the fourth elastic member 404 can make the connection between the conductive sheet 403 and the positive and negative pole caps of the cylindrical battery cell 101 closer. Jacks 1003 are arranged at the four corners of the upper bracket 102 and the lower bracket 103. Four legs 405 are fixedly connected to the side surfaces of the first cover plate 401 and the second cover plate 402 that are close to each other. The first cover plate 401 and the second cover plate 402 are generally rectangular. The four legs 405 are respectively arranged at the four corners of the corresponding first cover plate 401 or second cover plate 402. The ends of the legs 405 are provided with anti-detachment claws 4051. The anti-detachment claws 4051 can be inserted into the corresponding jacks 1003. The anti-detachment claws 4051 are made of nylon material. The nylon material has good elasticity, toughness and wear resistance, which can ensure the stability and fixity of the first cover plate 401 and the second cover plate 402, preventing the first cover plate 401 or the second cover plate 402 from loosening or falling off during use. At the same time, slots 4001 for facilitating the insertion of test pens are distributed on the first cover plate 401, the second cover plate 402 and the movable cylinder 106, so that the positive and negative pole caps of the cylindrical battery cell 101 are partially exposed. In this way, the test pen is used to touch the positive and negative pole caps of the cylindrical battery cell 101, and with the cooperation of a multimeter, it is convenient for the staff to detect the cylindrical battery cell 101 to accurately know the working state of the cylindrical battery cell 101.

[0029] It can be seen from this that during use, the battery brackets are first combined into a battery pack according to the series-parallel connection scheme. The battery brackets are connected through the slide rails 1001 and the chutes 1002 provided on the battery brackets. After the connection is completed, cylindrical battery cells 101 are placed in the second through holes 1051. When the cylindrical battery cells 101 are placed, the cylindrical battery cells 101 will squeeze the limiting rods 302, causing the limiting rods 302 to rotate around the connection points with the fixed blocks 301. Furthermore, the two limiting rods 302 move away from each other, and then the limiting rods 302 squeeze the corresponding second elastic members 303, causing the second elastic members 303 to be compressed. Furthermore, the second elastic members 303 store elastic potential energy. In this way, the limiting rods 302 can firmly and tightly clamp the cylindrical battery cells 101 in the second through holes 1051, preventing the cylindrical battery cells 101 from loosening due to vibration or external force, which may lead to poor contact of the cylindrical battery cells 101. After the cylindrical battery cells 101 are placed, the corresponding first cover plate 401 and second cover plate 402 are then used. The legs 405 are inserted into the corresponding jacks 1003. Since the conductive sheets 403 are connected to the mutually adjacent side surfaces of the first cover plate 401 and the second cover plate 402, the conductive sheets 403 achieve series-parallel connection on the first cover plate 401 and the second cover plate 402 according to the series-parallel connection scheme of the battery pack. Furthermore, multiple cylindrical battery cells 101 can be connected in series and parallel. In this way, the assembly of the battery pack is completed;

[0030] When a certain cylindrical battery cell 101 needs to be replaced in the battery pack, first use a test probe and a multimeter to detect the problematic cylindrical battery cell 101. When detecting, insert the test probe into the slot 4001 and make contact with the exposed positive and negative cap parts of the cylindrical battery cell 101, so as to detect and mark the problematic cylindrical battery cell 101. After the detection and marking are completed, press the anti - detachment claw 4051 on the first cover plate 401, and then the anti - detachment claw 4051 is pressed into the jack 1003, and then the first cover plate 401 can be removed. Then press down the corresponding pressure plate 201, and the pressure plate 201 drives the pressure rod 202 to move downward. Then the pressure plate 201 squeezes the first elastic member 207, so that the first elastic member 207 stores elastic potential energy. Since the cylindrical battery cell 101 has been placed, the second pull rope 304 is in a slack state. And because there is a clearance between the pressure rod 202 and the slider 204, when the pressure rod 202 moves downward, the pressure rod 202 will pull one end of the second pull rope 304, making the second pull rope 304 in a tension state. At this time, the pressure rod 202 will not touch the slider 204. As the pressure rod 202 continues to press down, the pressure rod 202 comes into contact with the slider 204, and then the pressure rod 202 squeezes the slider 204, making the slider 204 move downward. Then the slider 204 pulls one end of the first pull rope 205, and the first pull rope 205 pulls the movable cylinder 106, making the movable cylinder 106 move upward. Then the movable cylinder 106 drives the corresponding cylindrical battery cell 101 to move upward. Then the movable cylinder 106 pulls the third elastic member 208, making the third elastic member 208 be pulled again. Then the corresponding cylindrical battery cell 101 can be taken out and the replacement is completed. After the replacement is completed, the first elastic member 207, the second elastic member 303 and the third elastic member 208 release the elastic potential energy, making the corresponding components reset. Then insert the leg 405 on the first cover plate 401 into the corresponding jack 1003, and then the replacement operation is completed. In this way, through the mutual cooperation of components such as the pressure rod 202, the first pull rope 205 and the movable cylinder 106, the need to disassemble other unnecessary parts is reduced, the damage to the surrounding batteries is reduced, the maintenance time is saved, and the maintenance efficiency of the battery pack is improved. At the same time, since the movable cylinder 106 is used to smoothly push out the cylindrical battery cell 101, the risk of damage to the cylindrical battery cell 101 can be reduced, and the damage to the surrounding cylindrical battery cells 101 is reduced.

[0031] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A battery pack with a replaceable single battery quickly, characterized in that: It includes a cylindrical battery cell (101), and the cylindrical battery cells (101) are combined into a battery pack according to a series-parallel scheme by a battery bracket. On both sides of the battery pack, there are non-welding series-parallel cover plates. The battery brackets are connected by slide rails (1001) and chutes (1002) provided on the battery brackets. The battery brackets are divided into an upper bracket (102) and a lower bracket (103). The upper bracket (102) and the lower bracket (103) are connected by a connecting rod (104). The upper bracket (102) is provided with a first through hole (1021), and a boss cylinder (105) is fixedly connected in the first through hole (1021). A second through hole (1051) for placing the cylindrical battery cell (101) is provided in the boss cylinder (105). A movable cylinder (106) for placing the cylindrical battery cell (101) is slidably connected in the lower bracket (103), and the movable cylinder (106) moves up and down through a driving component; The driving component includes a pressing plate (201) slidably connected between the inner walls of the boss cylinder (105) and the first through hole (1021). The pressing plate (201) is sleeved on the upper part of the boss cylinder (105). Pressing rods (202) are symmetrically and fixedly connected to the bottom surface of the pressing plate (201). Fixing plates (203) are symmetrically and fixedly connected to the bottom surface of the boss cylinder (105). Sliders (204) are slidably connected in the fixing plates (203). The sliders (204) are located directly below the pressing rods (202). One end of a first pulling rope (205) is fixedly connected to one side of the slider (204). The other end of the first pulling rope (205) is wound around a guide rod (206) and fixedly connected to the movable cylinder (106). A first elastic member (207) is provided between the pressing plate (201) and the boss cylinder (105). A third elastic member (208) is provided between the movable cylinder (106) and the lower bracket (103); A clamping component for clamping cylindrical single cells is further provided in the boss cylinder (105). The clamping component includes fixing blocks (301) symmetrically and fixedly connected in the second through hole (1051). A limiting rod (302) is rotatably connected to the fixing block (301). The limiting rod (302) is inclined towards the central axis of the second through hole (1051). A second elastic member (303) is provided between the limiting rod (302) and the inner wall of the second through hole (1051). One end of a second pulling rope (304) is fixedly connected to one side surface of the limiting rod (302). The other end of the second pulling rope (304) penetrates through the boss cylinder (105) and is fixedly connected to the corresponding pressing rod (202); A gap is provided between the pressing rod (202) and the slider (204).

2. The battery pack capable of quickly replacing single batteries according to claim 1, wherein: Steel balls (305) are movably connected to the outer side wall of the boss cylinder (105). The steel balls (305) are arranged up and down and clamp the second pulling rope (304).

3. The battery pack capable of quickly replacing single cells according to claim 2, wherein: The spot-welding-free series-parallel cover plate includes a first cover plate (401) and a second cover plate (402). The first cover plate (401) and the second cover plate (402) are respectively arranged on both sides of the battery pack. A conductive sheet (403) is connected to the side surfaces of the first cover plate (401) and the second cover plate (402) close to each other. The conductive sheet (403) realizes series-parallel connection on the first cover plate (401) and the second cover plate (402) according to the series-parallel scheme of the battery pack. The conductive sheet (403) is connected to the positive and negative pole caps of the cylindrical battery cell (101). A fourth elastic member (404) is arranged on the back of the conductive sheet (403) located on the first cover plate (401).

4. A battery pack capable of quickly replacing single cells according to claim 3, characterized in that: The upper bracket (102) and the lower bracket (103) are regular quadrangular prisms. Slide rails (1001) and chutes (1002) are respectively arranged on the opposite side surfaces of the regular quadrangular prism. Jacks (1003) are arranged at the four corners of the upper bracket (102) and the lower bracket (103). At least two legs (405) are fixedly connected to the side surfaces of the first cover plate (401) and the second cover plate (402) close to each other. The end of the leg (405) is provided with an anti-detachment claw (4051). The anti-detachment claw (4051) can be inserted into the corresponding jack (1003).

5. A battery pack capable of quickly replacing single cells according to claim 4, characterized in that: Slots (4001) for facilitating the insertion of test probes are distributed on the first cover plate (401), the second cover plate (402) and the movable cylinder (106).

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