Battery pack capable of quickly replacing single batteries

Abstract

The invention relates to the technical field of battery packs, in particular to a battery pack capable of quickly replacing single batteries. Comprising cylindrical battery cells, the cylindrical battery cells are combined into a battery pack through a battery support according to a series-parallel connection scheme, spot-welding-free series-parallel connection cover plates are arranged on the two sides of the battery pack, the battery support is divided into an upper support and a lower support, and the upper support and the lower support are connected through a connecting rod. The battery supports are connected through sliding rails and sliding grooves which are arranged on the battery supports. According to the invention, the components such as the pressing rod, the first pull rope and the movable cylinder are arranged, and through the mutual cooperation of the components such as the pressing rod, the first pull rope and the movable cylinder, the need for dismounting 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; and meanwhile, the cylindrical battery cell is stably pushed out by adopting the movable cylinder, so that the risk of damage to the cylindrical battery cell can be reduced, and the damage to the surrounding cylindrical battery cell is reduced.

Description

Technical Field

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

[0002] A battery pack is an energy storage device composed of multiple cells connected in series, parallel or in a hybrid manner. These 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 many fields, such as electric vehicles, renewable energy storage systems and portable electronic devices.

[0003] Existing battery packs, such as the patent with announcement number CN204792979U, disclose a spot welding-free battery combination bracket, which can effectively avoid damage to the single battery during the production of cylindrical lithium battery packs and the maintenance of the battery pack by plugging the positive bracket and the negative bracket together. At the same time, when the bracket combination is completed, the series and parallel connection of the battery pack is realized. However, if one or more single batteries located in the middle of the patent have problems, the positive bracket and the negative bracket located in the middle are more cumbersome to disassemble, and usually multiple adjacent single batteries and brackets need to be disassembled to replace the faulty single battery, which not only increases the maintenance time and makes the replacement of single batteries more cumbersome, but also may cause damage to surrounding batteries. In view of this, the present invention proposes a battery pack that can quickly replace single batteries to solve the above-mentioned technical problems. Summary of the invention

[0004] In order to overcome the technical problems mentioned in the background art, the present invention provides a battery pack with rapidly replaceable single cells.

[0005] The technical solution of the present invention is: a battery pack with quickly replaceable single-cell batteries, including cylindrical battery cells, which are combined into a battery pack through a battery holder according to a series-parallel scheme, and both sides of the battery pack are provided with spot-welding-free series-parallel cover plates, the battery holder is divided into an upper holder and a lower holder, the upper holder is connected to the lower holder by a connecting rod, and the battery holders are connected by slide rails and slide grooves arranged on the battery holders; the upper holder is provided with a first through hole, a boss cylinder is fixedly connected in the first through hole, a second through hole for placing the cylindrical battery cell is provided in the boss cylinder, a movable cylinder for placing the cylindrical battery cell is slidably connected in the lower holder, and the movable cylinder is moved up and down by a driving component.

[0006] Furthermore, the driving assembly includes a pressure plate slidably connected between the boss tube and the inner wall of the first through hole, the pressure plate is sleeved on the upper part of the boss tube, the bottom surface of the pressure plate is symmetrically fixed with a pressure rod, the bottom surface of the boss tube is symmetrically fixed with a fixing plate, a slider is slidably connected in the fixing plate, the slider is located directly below the pressure rod, one side of the slider is fixed to one end of a first pull rope, the other end of the first pull rope is coiled and fixed to the movable tube through a guide rod, a first elastic member is arranged between the pressure plate and the boss tube, and a third elastic member is arranged between the movable tube and the lower bracket.

[0007] Furthermore, a clamping assembly for clamping a cylindrical single cell is also provided in the boss tube, and the clamping assembly includes a fixed block symmetrically fixed in the second through hole, and a limiting rod is rotatably connected to the fixed block, and the limiting rod is inclined toward the central axis of the second through hole. A second elastic member is provided between the limiting rod and the inner wall of the second through hole, and one side surface of the limiting rod is fixed to one end of a second pull rope, and the other end of the second pull rope passes through the boss tube and is fixed to the corresponding pressure rod.

[0008] Furthermore, a gap is set between the pressure rod and the sliding block.

[0009] Furthermore, a steel ball is movably connected to the outer wall of the boss tube, and the steel ball is arranged up and down and clamps the second pull rope.

[0010] Furthermore, the spot-welding-free series-parallel 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, and a conductive sheet is connected to a side of the first cover plate and the second cover plate close to each other, and the conductive sheet is connected in series and parallel on the first cover plate and the second cover plate according to the series and parallel scheme of the battery pack, the conductive sheet is connected to the positive and negative electrode caps of the cylindrical battery cell, and a fourth elastic member is arranged on the back of the conductive sheet on the first cover plate.

[0011] Furthermore, the upper bracket and the lower bracket are regular quadrangular prisms, and the two opposite side surfaces of the regular quadrangular prisms are respectively provided with sliding rails and sliding grooves, and the four corners of the upper bracket and the lower bracket are provided with sockets, and the side surfaces of the first cover plate and the second cover plate close to each other are fixed with at least two legs, and the ends of the legs are provided with anti-slip claws, and the anti-slip claws can be inserted into the corresponding sockets.

[0012] Furthermore, slots for inserting test leads are provided 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: 1. The present invention is provided with components such as a pressure rod, a slider and a movable cylinder. When a cylindrical battery cell needs to be replaced in a battery pack, firstly, the problematic battery cell is detected and marked with a test lead and a multimeter, and then the anti-dropping claw on the first cover plate is pressed to remove the first cover plate, and then the corresponding pressure plate is pressed downward, so that the pressure rod contacts the slider. As the pressure rod continues to be pressed downward, the pressure rod pushes the slider to move downward, and then the movable cylinder is raised through the action of the first pull rope, and then the battery cell can be taken out. In this way, through the mutual cooperation of the pressure rod, the first pull rope and the movable cylinder and other components, 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 cylindrical battery cell is smoothly pushed out by the movable cylinder, the risk of damage to the cylindrical battery cell can be reduced, and the damage to the surrounding cylindrical battery cells is reduced.

[0014] 2. The present invention is provided with components such as a first cover plate, a second cover plate and a conductive sheet, and no spot welding is required during use, thus avoiding damage to the cylindrical battery cells caused by spot welding. Moreover, when problems occur in the cylindrical battery cells, they can be replaced very simply and conveniently, thus avoiding damage to other good cylindrical battery cells during replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a series-parallel schematic diagram of the present invention.

[0017] Figure 3 It is a schematic diagram of the structure of the upper bracket, the lower bracket, the connecting rod and other components of the present invention.

[0018] Figure 4 Another schematic diagram of the structure of the upper bracket, the lower bracket, the connecting rod and other components of the present invention.

[0019] Figure 5 It is a cross-sectional view of the upper bracket, the lower bracket, the connecting rod and other components of the present invention.

[0020] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0021] Figure 7 It is a schematic structural diagram of the first cover plate, legs, conductive sheet and other components of the present invention.

[0022] Figure 8 It is a schematic structural diagram of the second cover plate, conductive sheet, legs and other components of the present invention.

[0023] Parts names and serial numbers 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, slide groove, 1003, jack, 105, boss tube, 1051, second through hole, 106, movable tube, 201, pressure plate, 202, pressure rod, 203, fixing plate, 204, slide Block, 205, first pull rope, 206, guide rod, 207, first elastic member, 208, third elastic member, 301, fixed block, 302, limit rod, 303, second elastic member, 304, second pull rope, 305, steel ball, 401, first cover plate, 402, second cover plate, 403, conductive sheet, 404, fourth elastic member, 405, support leg, 4051, anti-slip claw, 4001, slot. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] A battery pack with rapidly replaceable single cells, such as Figure 1-Figure 8As shown, it includes cylindrical battery cells 101, which are combined into a battery pack through a battery bracket according to a series-parallel scheme. The upper and lower sides of the battery pack are provided with spot-welding-free series-parallel cover plates. The battery brackets are connected by a slide rail 1001 and a slide groove 1002 provided on the battery bracket, so that gaps are left between two adjacent cylindrical battery cells 101. These gaps can be used as air circulation channels, which can effectively allow air circulation and heat can be taken 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, and the two opposite sides of the regular quadrangular prisms The upper bracket 102 and the lower bracket 103 are respectively provided with a slide rail 1001 and a slide groove 1002. The upper bracket 102 and the lower bracket 103 are respectively arranged at the two ends of the cylindrical battery cell 101. 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. A boss tube 105 is fixedly connected in the first through hole 1021. The boss tube 105 is provided with a second through hole 1051 for placing the cylindrical battery cell 101. A movable cylinder 106 for placing the cylindrical battery cell 101 is slidably connected in the lower bracket 103. The movable cylinder 106 is moved up and down by a driving component. Specifically, the driving component includes a sliding connection The pressure plate 201 between the boss cylinder 105 and the inner wall of the first through hole 1021 is sleeved on the upper part of the boss cylinder 105. The bottom surface of the pressure plate 201 is symmetrically fixed with a pressure rod 202. The bottom surface of the boss cylinder 105 is symmetrically fixed with a fixing plate 203. The fixing plate 203 is slidably connected with a slider 204. The slider 204 is located directly below the pressure rod 202, and a gap is set between the pressure rod 202 and the slider 204. One end of the first pull rope 205 is fixed to the side of the slider 204 close to the cylindrical battery core 101. The other end of the first pull rope 205 is coiled and fixed to the movable cylinder 106 through the guide rod 206. The pressure plate 201 and the boss cylinder 1 05 is provided with a first elastic member 207, 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, and 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 is always flush with the bottom surface of the lower bracket 103, so that the positioning of the cylindrical battery cell 101 is more accurate and poor contact is prevented.

[0026] Furthermore, a clamping assembly for clamping a cylindrical single battery is also provided in the boss cylinder 105, and the clamping assembly includes a fixed block 301 symmetrically fixed in the second through hole 1051, and a limit rod 302 is rotatably connected to the fixed block 301, and the limit rod 302 is inclined toward the central axis of the second through hole 1051. A second elastic member 303 is provided between the limit rod 302 and the inner wall of the second through hole 1051, and the second elastic member 303 is specifically a spring, so that the limit rod 302 can firmly and tightly clamp the cylindrical battery cell 101 in the second through hole 1051 to prevent the cylindrical battery cell 101 from vibrating. Or it becomes loose due to external force, one side of the limit rod 302 is fixed to one end of the second pull rope 304, the other end of the second pull rope 304 passes through the boss tube 105 and is fixed to the corresponding pressure rod 202, and a steel ball 305 is movably connected to the outer wall of the boss tube 105, and the steel ball 305 is arranged up and down and clamps the second pull rope 304, so that when the second pull rope 304 is pulled, the second pull rope 304 is coiled on the steel ball 305, which can prevent the second pull rope 304 from being cut by the sharp corners of the boss tube 105, thereby causing the device to fail. When the second elastic member 303 is in a normal state, the second pull rope 304 is in a straightened state.

[0027] Specifically, the spot welding-free series-parallel cover plate includes a first cover plate 401 and a second cover plate 402, which are respectively arranged on both sides of the battery pack, and a conductive sheet 403 is connected to a side of the first cover plate 401 and the second cover plate 402 close to each other, and the conductive sheet 403 is connected in series and parallel on the first cover plate 401 and the second cover plate 402 according to the series and parallel scheme of the battery pack, and a circular protrusion is arranged on the conductive sheet 403, and the circular protrusion on the conductive sheet 403 is connected to the positive and negative electrode caps of the cylindrical battery cell 101, so that when using No spot welding is required during use, which avoids damage to the cylindrical battery cell by spot welding. At the same time, the contact between the circular protrusion and the positive and negative caps of the battery cell can ensure a more firm and stable electrical connection, reducing the risk of poor contact or looseness. A fourth elastic member 404 is arranged on the back of the conductive sheet 403 on the first cover plate 401. The fourth elastic member 404 is specifically a spring. The fourth elastic member 404 can make the conductive sheet 403 and the positive and negative caps of the cylindrical battery cell 101 more closely connected. The four corners of the upper bracket 102 and the lower bracket 103 are all provided with The socket 1003, the first cover plate 401 and the second cover plate 402 are fixedly connected to one side thereof close to each other with four legs 405, the first cover plate 401 and the second cover plate 402 are roughly rectangular, the four legs 405 are respectively arranged at the four corners of the corresponding first cover plate 401 or the second cover plate 402, the ends of the legs 405 are provided with anti-slip claws 4051, the anti-slip claws 4051 can be plugged into the corresponding socket 1003, the anti-slip claws 4051 are made of nylon, which has good elasticity, toughness and wear resistance, thereby ensuring that the first cover plate 401 The stability and fixity of the second cover plate 402 can prevent the first cover plate 401 or the second cover plate 402 from loosening or falling off during use. At the same time, the first cover plate 401, the second cover plate 402 and the movable cylinder 106 are all provided with slots 4001 for inserting test leads, so that the positive and negative cap parts of the cylindrical battery cell 101 are exposed. In this way, the positive and negative cap parts of the cylindrical battery cell 101 are touched with the test leads, and the cylindrical battery cell 101 can be conveniently tested by the staff in conjunction with the multimeter to accurately know the working status of the cylindrical battery cell 101.

[0028] It can be seen that when in use, the battery holders are first combined into a battery pack according to the series-parallel scheme, and the battery holders are connected by the slide rails 1001 and the slide grooves 1002 arranged on the battery holders. After the connection is completed, the cylindrical battery core 101 is placed in the second through hole 1051. When placed, the cylindrical battery core 101 will squeeze the limit rod 302, so that the limit rod 302 rotates around the connection point with the fixed block 301, and then the two limit rods 302 move away from each other, and then the limit rod 302 squeezes the corresponding second elastic member 303, so that the second elastic member 303 is compressed, and then the second elastic member 303 stores elastic potential energy, so that the limit rod 302 can be placed in the second through hole 1051. 51 can firmly and tightly clamp the cylindrical battery cell 101 to prevent the cylindrical battery cell 101 from loosening due to vibration or external force, thereby causing poor contact of the cylindrical battery cell 101. After the cylindrical battery cell 101 is placed, the corresponding first cover plate 401 and the second cover plate 402 are then used to insert the legs 405 into the corresponding jacks 1003. Since the first cover plate 401 and the second cover plate 402 are connected to a side surface close to each other with a conductive sheet 403, the conductive sheet 403 is connected in series and parallel on the first cover plate 401 and the second cover plate 402 according to the series and parallel scheme of the battery pack, and then multiple cylindrical batteries 101 can be connected in series and parallel, thus completing the assembly of the battery pack; When a cylindrical battery cell 101 of the battery pack needs to be replaced, the test probe and the multimeter are first used to detect the cylindrical battery cell 101 with a problem. During the detection, the test probe is inserted into the slot 4001 and contacts the exposed positive and negative cap portions of the cylindrical battery cell 101, so that the cylindrical battery cell 101 with a problem can be detected and marked. After the detection and marking are completed, the anti-detachment claw 4051 on the first cover plate 401 is pressed, and the anti-detachment claw 4051 is pressed into the socket 1003, so that the first cover plate 401 can be removed, and then the corresponding pressing plate 201 is pressed downward, so that the pressing plate 201 is pressed downward. 1 drives the pressure rod 202 to move downward, and 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 relaxed state. Due to the gap between the pressure rod 202 and the slider 204, when the pressure rod 202 moves downward, the pressure rod 202 pulls one end of the second pull rope 304, so that the second pull rope 304 is in a tensioned state. At this time, the pressure rod 202 does not touch the slider 204. As the pressure rod 202 continues to be pressed downward, the pressure rod 202 contacts the slider 204, and then The pressure rod 202 squeezes the slider 204, so that the slider 204 moves downward, and then the slider 204 pulls one end of the first pull rope 205, and then the first pull rope 205 pulls the movable cylinder 106, so that the movable cylinder 106 moves upward, and then the movable cylinder 106 drives the corresponding cylindrical battery cell 101 to move upward, and then the movable cylinder 106 pulls the third elastic member 208, so that the third elastic member 208 is pulled again, and then the corresponding cylindrical battery cell 101 can be taken out and replaced. After the replacement is completed, the first elastic member 207, the second elastic member 303 and the third elastic member 208 release their elasticity. Potential energy causes the corresponding components to reset, and then the legs 405 on the first cover plate 401 are inserted into the corresponding sockets 1003 to complete the replacement operation. In this way, through the cooperation of the pressure rod 202, the first pull rope 205 and the movable cylinder 106 and other components, the need to disassemble other unnecessary parts is reduced, the damage to the surrounding batteries is reduced, the maintenance time is saved, and the battery pack maintenance efficiency is improved. At the same time, since the movable cylinder 106 is used to smoothly push 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.

[0029] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack capable of quickly replacing single cells, characterized in that: The invention comprises a cylindrical battery cell (101), wherein the cylindrical battery cells (101) are combined into a battery pack through a battery bracket according to a series-parallel scheme, and both sides of the battery pack are provided with a spot welding-free series-parallel cover plate, and the battery brackets are connected by a slide rail (1001) and a slide groove (1002) provided on the battery bracket, and the battery bracket is divided into an upper bracket (102) and a lower bracket (103), and the upper bracket (102) and the lower bracket (103) are connected by a The upper bracket (102) is connected to a rod (104), the upper bracket (102) is provided with a first through hole (1021), a boss tube (105) is fixedly connected in the first through hole (1021), a second through hole (1051) for placing a cylindrical battery cell (101) is provided in the boss tube (105), and a movable tube (106) for placing the cylindrical battery cell (101) is slidably connected in the lower bracket (103), and the movable tube (106) is moved up and down by a driving component.

2. A battery pack with rapidly replaceable single cells according to claim 1, characterized in that: The driving assembly comprises a pressure plate (201) slidably connected between the boss tube (105) and the inner wall of the first through hole (1021); the pressure plate (201) is sleeved on the upper part of the boss tube (105); a pressure rod (202) is symmetrically fixedly connected to the bottom surface of the pressure plate (201); a fixing plate (203) is symmetrically fixedly connected to the bottom surface of the boss tube (105); a sliding block (204) is slidably connected to the inside of the fixing plate (203); the sliding block (204) ) is located directly below the pressure rod (202), one side of the slider (204) is fixedly connected to one end of a first pull rope (205), the other end of the first pull rope (205) is coiled and fixedly connected to the movable cylinder (106) through a guide rod (206), a first elastic member (207) is provided between the pressure plate (201) and the boss cylinder (105), and a third elastic member (208) is provided between the movable cylinder (106) and the lower bracket (103).

3. A battery pack with rapidly replaceable single cells according to claim 2, characterized in that: A clamping assembly for clamping a cylindrical single battery is also provided in the boss tube (105), the clamping assembly comprising a fixed block (301) symmetrically fixed in the second through hole (1051), a limiting rod (302) rotatably connected to the fixed block (301), the limiting rod (302) being arranged obliquely toward the central axis of the second through hole (1051), a second elastic member (303) being arranged between the limiting rod (302) and the inner wall of the second through hole (1051), one end of a second pull rope (304) being fixed to one side surface of the limiting rod (302), the other end of the second pull rope (304) passing through the boss tube (105) and being fixed to the corresponding pressure rod (202).

4. A battery pack with rapidly replaceable single cells according to claim 3, characterized in that: A gap is provided between the pressure rod (202) and the sliding block (204).

5. A battery pack with rapidly replaceable single cells according to claim 4, characterized in that: A steel ball (305) is movably connected to the outer wall of the boss tube (105), and the steel ball (305) is arranged up and down and clamps the second pull rope (304).

6. A battery pack with rapidly replaceable single cells according to claim 5, characterized in that: The spot welding-free series-parallel cover plate comprises a first cover plate (401) and a second cover plate (402), the first cover plate (401) and the second cover plate (402) being respectively arranged on two sides of the battery pack, a conductive sheet (403) being connected to a side surface of the first cover plate (401) and the second cover plate (402) close to each other, the conductive sheet (403) being connected in series and parallel on the first cover plate (401) and the second cover plate (402) according to the series and parallel scheme of the battery pack, the conductive sheet (403) being connected to the positive and negative electrode caps of the cylindrical battery cell (101), and a fourth elastic member (404) being arranged on the back of the conductive sheet (403) located on the first cover plate (401).

7. A battery pack with rapidly replaceable single cells according to claim 6, characterized in that: The upper bracket (102) and the lower bracket (103) are regular quadrangular prisms, and the two opposite side surfaces of the regular quadrangular prisms are respectively provided with a slide rail (1001) and a slide groove (1002), and the four corners of the upper bracket (102) and the lower bracket (103) are provided with a socket (1003), and the side surfaces of the first cover plate (401) and the second cover plate (402) close to each other are fixedly connected with at least two legs (405), and the ends of the legs (405) are provided with anti-slip claws (4051), and the anti-slip claws (4051) can be inserted into the corresponding sockets (1003).

8. A battery pack with rapidly replaceable single cells according to claim 7, characterized in that: Slots (4001) for facilitating the insertion of test leads are distributed on the first cover plate (401), the second cover plate (402) and the movable cylinder (106).

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