A battery residual capacity resistive discharge system

Abstract

The application discloses a battery residual capacity resistance discharging system and belongs to the technical field of battery processing. The battery residual capacity resistance discharging system comprises a casing. Multiple braking resistors are distributed in the inner cavity of the casing. Four insulating junction boxes are arranged on the two sides of the inner cavity of the casing. An electricity connection assembly is arranged in the inner cavity of the casing. The electricity connection assembly comprises two junction columns. An arc-shaped clamping groove is formed in the top and bottom of the insulating junction box. The junction column is clamped in the inner cavity of the arc-shaped clamping groove. Multiple conductive sheets are welded on the surface of the junction column. The casing and the supporting assembly are used in cooperation to support and fix the multiple braking resistors. The multiple braking resistors are electrically connected under the cooperation of the insulating junction box and the electricity connection assembly. The residual capacity in the battery is discharged under the cooperation of the discharging assembly and the advancing assembly. The purpose of tightly and stably connecting electricity, quickly releasing voltage and effectively reducing the circuit failure rate is achieved.

Description

Technical Field

[0001] This invention belongs to the field of battery processing technology, and in particular relates to a resistive discharge system for residual battery charge. Background Technology

[0002] Battery residual discharge refers to the discharge behavior that occurs when a battery is not completely depleted and still has a certain amount of charge remaining during use. Different batteries have different residual discharge characteristics. Accurately understanding the residual discharge situation is an important part of evaluating battery performance and also an important guarantee for ensuring the safety of battery recycling and processing.

[0003] In the field of battery applications, batteries often retain a certain amount of charge after use. Before recycling and remanufacturing batteries, it is necessary to release the residual charge to ensure the safety of subsequent processing steps. Some discharge systems use screws to fix the connection points when connecting the battery and the discharge equipment. After prolonged bending and kinking, the connection points are prone to loosening, resulting in poor contact, affecting the discharge effect, and causing circuit failure. Summary of the Invention

[0004] The purpose of this invention is to provide a resistive discharge system for residual battery charge to solve the above-mentioned technical problems.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A battery residual charge resistive discharge system, the system comprising a housing: multiple braking resistors are distributed in the inner cavity of the housing; four insulating junction boxes are provided on both sides of the inner cavity of the housing; a power connection assembly is provided in the inner cavity of the housing; the power connection assembly includes two terminals; arc-shaped slots are provided at the top and bottom of the insulating junction boxes; the terminals are engaged in the inner cavity of the arc-shaped slots; multiple conductive plates are welded to the surface of the terminals; the conductive plates penetrate into the inner cavity of the insulating junction boxes; a short conductive rod and a long conductive rod are provided through one side of the insulating junction box; power connection sleeves are provided on both sides of the surface of the braking resistors; a screw is provided through the opening of the power connection sleeve; the ends of the short conductive rod and the long conductive rod away from the insulating junction box are fixedly connected to the power connection sleeves by the screw. Two connecting bolts are installed through the side of the insulating junction box away from the braking resistor. The short and long conductive rods extend to the bottom of the insulating junction box and are fixedly connected to the conductive sheet via the connecting bolts. Discharge assemblies are provided at both ends of the front side of the housing. The discharge assembly includes a switching power supply fixedly installed on the front side of the housing. From left to right, a voltage protector, two circuit breakers, and a solid-state relay are installed sequentially on the front side of the housing. A grounding socket is fixedly installed at both ends of the front side of the housing. A grounding head is inserted into the inner cavity of the grounding socket. A reinforcing conductive sleeve is fixedly connected to the inner cavity of the grounding socket. Grounding springs are integrally stamped on both sides of the reinforcing conductive sleeve. Grounding arc plates adapted to the grounding springs are embedded and fixedly connected to both sides of the inner cavity of the grounding head. A pushing assembly is provided at both ends of the front side of the housing, and a support assembly is provided on both sides of the braking resistor.

[0006] Preferably, the front end of the terminal on the left is electrically connected to the negative terminal of the DC output of the solid-state relay, the positive terminal of the DC output of the solid-state relay is electrically connected to the output terminal of the circuit breaker, the input terminal of the circuit breaker is electrically connected to the left-side electrical connector, and the electrical connector on the right is electrically connected to the terminal on the right.

[0007] Preferably, the propulsion assembly includes an extrusion plate rotatably connected to the surface of the electrical contact base. Both sides of the surface of the extrusion plate are provided with arc-shaped top grooves. Both sides of the electrical contact head are fixedly connected with connecting columns, and the arc-shaped top grooves are sleeved on the surface of the connecting columns.

[0008] Preferably, the top of the power connector is provided with a rectangular sliding groove, the inner cavity of the rectangular sliding groove is slidably connected to a limiting plate, the top of the extrusion plate is provided with a limiting slot, and the limiting plate is engaged in the inner cavity of the limiting slot.

[0009] Preferably, the inner cavity of the rectangular slide is provided with a spring, one end of the spring is in close contact with the limiting plate, and the other end of the spring is in close contact with the inner wall of the rectangular slide.

[0010] Preferably, the support assembly includes threaded support rods located on both sides of the braking resistor, and heat-insulating plugs are provided on both sides of the surface of the threaded support rods. The two heat-insulating plugs are respectively tightly fitted to the inner wall of the braking resistor and the housing.

[0011] Preferably, an L-shaped support plate is fitted onto the surface of the threaded support rod, and two fixing bolts are provided through the side of the L-shaped support plate away from the insulating junction box. The insulating junction box is fixedly connected to the surface of the L-shaped support plate by the fixing bolts.

[0012] Preferably, the end of the threaded support rod away from the braking resistor extends through to the outside of the housing and is threaded with a first nut, and the surface of the threaded support rod and both sides of the L-shaped support plate are threaded with second nuts.

[0013] Preferably, the front and rear sides of the housing are provided with multiple heat dissipation holes, and four air-cooled radiators are fixedly installed on the front and rear sides of the housing, with the air-cooled radiators located at the heat dissipation holes.

[0014] The discharge method of this battery residual charge resistive discharge system is as follows: Step 1: The user first inserts the connector into the surface of the connector base, making the connector base and the connector electrically connected. At this time, the arc-shaped top groove is fitted onto the surface of the connecting post. Then, the user rotates the extrusion plate. The extrusion plate rotates with its connection position with the connector base as the center of rotation, causing the arc-shaped top groove to slide on the surface of the connecting post. During the rotation of the extrusion plate, the inner wall of the arc-shaped top groove compresses the connecting post, causing the extrusion plate to drive the connector towards the connector base. This causes the connector to compress the contact spring, causing the contact spring to undergo elastic deformation until the connector is completely fitted onto the surface of the reinforcing conductive sleeve. Then, the contact spring recovers its elasticity, allowing the contact spring to be completely engaged in the inner cavity of the contact arc piece, making a tight electrical contact between the contact spring and the contact arc piece. Step 2: During the rotation of the extrusion plate, the limiting plate is squeezed. Due to the action of the inclined surface at the top of the limiting plate, the limiting plate slides in the inner cavity of the rectangular groove, while simultaneously squeezing the spring. After the bottom of the extrusion plate is completely in contact with the top of the connector, the spring rebounds and pushes the limiting plate forward, causing the limiting plate to slide back to its original position and engage in the inner cavity of the limiting groove, thus limiting and locking the extrusion plate and ensuring stable connection between the connector and the connector. Step 3: After the connector is connected to the connector base, the end of the connector furthest from the connector base is equipped with a jumper clip to hold the battery electrode. Clamp the jumper clip onto the surface of the battery electrode, making the connector base electrically connected to the battery electrode (note the difference between positive and negative polarities). Then close the AC220V main switch to start the switching power supply. Then close the circuit breaker, allowing the battery current to flow through the braking resistor through the combination of the terminals and the jumper clip. The braking resistor dissipates the current as heat. While continuously consuming the remaining battery power, the voltage protector continuously monitors the battery's internal voltage. When the voltage drops to the safety threshold or the voltage is abnormal, a signal is issued. At this time, the circuit breaker opens, stopping the discharge. Finally, the AC220V main power supply is turned off. Discharge circuit description: The positive current of the battery passes through the circuit breaker input terminal and enters the positive DC input terminal of the solid-state relay from the circuit breaker output terminal. Finally, it enters the interior of the braking resistor through the negative DC input terminal of the circuit breaker. The negative current of the battery directly enters the interior of the braking resistor from the other end, thus achieving discharge.

[0015] The beneficial effects of this invention are as follows: By using the housing and support components together, multiple braking resistors are supported and fixed. At the same time, by using the insulating junction box and the power connection components together, multiple braking resistors are connected to the ground. Finally, by using the discharge components and the propulsion components together, the residual charge inside the battery is discharged. This achieves the purpose of tight and stable grounding, rapid voltage release, and effective reduction of circuit failure rate. Attached Figure Description

[0016] The advantages of the present invention, both above and / or other aspects, will become clearer and more readily understood through the following detailed description taken in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein: Figure 1 This is a front view schematic diagram of an embodiment of the present invention; Figure 2 This is a perspective view of the housing, braking resistor, discharge assembly, and support assembly according to an embodiment of the present invention; Figure 3 This is a perspective view of a braking resistor, a power connection component, and a support component according to an embodiment of the present invention; Figure 4 This is one embodiment of the present invention. Figure 3 A magnified view of point A in the middle; Figure 5 This is an exploded perspective view of an insulating junction box, a power connection assembly, and a support assembly according to an embodiment of the present invention. Figure 6 This is an exploded perspective view of a power connection component according to an embodiment of the present invention; Figure 7This is a top cross-sectional view of a discharge assembly and a propulsion assembly according to an embodiment of the present invention; Figure 8 This is a three-dimensional exploded view of a discharge assembly and a propulsion assembly according to an embodiment of the present invention; Figure 9 This is a circuit diagram of the main circuit and control circuit of one embodiment of the present invention; Figure 10 This is a schematic diagram of the main circuit and control circuit of one embodiment of the present invention.

[0017] In the attached diagram, the components represented by each number are as follows: 1. Housing; 2. Braking resistor; 3. Insulating junction box; 4. Power connection assembly; 41. Terminal block; 42. Arc-shaped slot; 43. Conductive sheet; 44. Conductive short rod; 45. Conductive long rod; 46. Power connection clamp; 47. Screw; 48. Connecting bolt; 5. Discharge assembly; 51. Switching power supply; 52. Voltage protector; 53. Circuit breaker; 54. Solid state relay; 55. Power connector; 56. Power connector; 57. Reinforced conductivity. 58. Connecting spring, 59. Connecting arc plate, 6. Propulsion assembly, 61. Extrusion plate, 62. Arc-shaped top groove, 63. Connecting column, 64. Rectangular slide, 65. Limiting plate, 66. Limiting slot, 67. Spring, 7. Support assembly, 71. Threaded support rod, 72. Heat insulation plug, 73. First nut, 74. L-shaped support plate, 75. Second nut, 76. Fixing bolt, 8. Heat dissipation hole, 9. Air-cooled radiator. Detailed Implementation

[0018] In the following description, embodiments of the battery residual charge resistive discharge system of the present invention will be described with reference to the accompanying drawings.

[0019] The embodiments described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation or scope of the invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0020] The accompanying drawings in this specification are schematic diagrams to aid in illustrating the concept of the invention, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly demonstrate the structure of the components in the embodiments of the invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0021] Example 1: Figure 1-10This invention illustrates a battery residual charge resistive discharge system according to an embodiment of the present invention. The system includes a housing 1. Multiple braking resistors 2 are distributed within the inner cavity of the housing 1. Multiple heat dissipation holes 8 are provided on both the front and rear sides of the housing 1. Four air-cooled radiators 9 are fixedly installed on both the front and rear sides of the housing 1, located at the heat dissipation holes 8. The combined use of the heat dissipation holes 8 and the air-cooled radiators 9 dissipates heat generated within the inner cavity of the housing 1, preventing excessive heat buildup and ensuring stable operation of the braking resistors 2. Four insulated junction boxes 3 are provided on both sides of the inner cavity of the housing 1. A power connection group is provided within the inner cavity of the housing 1. Component 4, the power connection assembly 4 includes two terminals 41. The top and bottom of the insulating junction box 3 are both provided with arc-shaped slots 42. The terminals 41 engage with the inner cavity of the arc-shaped slots 42. Multiple conductive plates 43 are welded to the surface of the terminals 41, extending through the inner cavity of the insulating junction box 3. A short conductive rod 44 and a long conductive rod 45 are provided through one side of the insulating junction box 3. Power connection sleeves 46 are fitted on both sides of the surface of the braking resistor 2. A screw 47 is provided through the opening of the power connection sleeve 46. The ends of the short conductive rod 44 and the long conductive rod 45 away from the insulating junction box 3 are fixedly connected to the power connection sleeves 46 by the screw 47. Two connecting bolts 48 are installed on the side of the insulated junction box 3 away from the braking resistor 2. A short conductive rod 44 and a long conductive rod 45 extend to the bottom of the insulated junction box 3 and are fixedly connected to the conductive sheet 43 by the connecting bolts 48. Discharge assemblies 5 are provided at both ends of the front side of the housing 1. The discharge assembly 5 includes a switching power supply 51 fixedly installed on the front side of the housing 1. From left to right, a voltage protector 52, two circuit breakers 53, and a solid-state relay 54 are installed on the front side of the housing 1. The front end of the terminal 41 on the left side is electrically connected to the negative terminal of the DC output of the solid-state relay 54, and the positive terminal of the DC output of the solid-state relay 54 is connected to the output of the circuit breaker 53. Electrical connections are made at the wire ends. The incoming wire of the circuit breaker 53 is electrically connected to the left-side electrical connector 55, and the right-side electrical connector 55 is electrically connected to the right-side terminal 41. Electrical connectors 55 are fixedly installed at both ends of the front side of the housing 1. Electrical connectors 56 are inserted into the inner cavity of the electrical connector 55. A reinforcing conductive sleeve 57 is fixedly connected to the inner cavity of the electrical connector 55. Electrical contact springs 58 are stamped and integrally formed on both sides of the reinforcing conductive sleeve 57. Electrical contact arc pieces 59 that are compatible with electrical contact springs 58 are embedded and fixedly connected to both sides of the inner cavity of the electrical connector 56. A push assembly 6 is provided at both ends of the front side of the housing 1, and a support assembly 7 is provided on both sides of the braking resistor 2.

[0022] The discharge method of this battery residual charge resistive discharge system is as follows: Step 1: The user first inserts the connector 56 onto the surface of the connector base 55, making the connector base 55 and the connector 56 electrically connected. At this time, the arc-shaped top groove 62 is fitted onto the surface of the connecting post 63. Then, the user rotates the pressing plate 61. The pressing plate 61 rotates with its connection position with the connector base 55 as the center of rotation, causing the arc-shaped top groove 62 to slide on the surface of the connecting post 63. During the rotation of the pressing plate 61, the inner wall of the arc-shaped top groove 62 compresses the connecting post 63, causing the pressing plate 61 to drive the connector 56 to move towards the connector base 55. This causes the connector 56 to compress the contact spring 58, causing the contact spring 58 to undergo elastic deformation until the connector 56 is completely fitted onto the surface of the reinforcing conductive sleeve 57. Then, the contact spring 58 recovers its elasticity, allowing the contact spring 58 to be completely engaged in the inner cavity of the contact arc piece 59, making electrical contact between the contact spring 58 and the contact arc piece 59. Step 2: During the rotation of the extrusion plate 61, the limiting plate 65 is extruded. Due to the action of the inclined surface at the top of the limiting plate 65, the limiting plate 65 slides in the inner cavity of the rectangular slide groove 64, and at the same time, it extrudes the spring 67 until the bottom of the extrusion plate 61 is completely attached to the top of the connector 55. Then, the spring 67 rebounds and pushes the limiting plate 65 forward, so that the limiting plate 65 slides back to its original position and engages in the inner cavity of the limiting groove 66, thereby limiting and locking the extrusion plate 61 and ensuring that the connector 56 and the connector 55 are stably connected. Step 3: After the terminal 56 is connected to the terminal 55, the end of the terminal 56 away from the terminal 55 is equipped with a jumper clip to hold the battery electrode. The jumper clip is clamped onto the surface of the battery electrode, so that the terminal 55 and the battery electrode are electrically connected. Note the difference between the positive and negative polarities. Then, close the AC220V main switch to start the switching power supply 51. Then, close the circuit breaker 53, so that the battery current flows through the braking resistor 2 through the cooperation of the terminal 41 and the terminal clip 46. The braking resistor 2 consumes the current in the form of heat. While continuously consuming the remaining battery power, the voltage protector 52 continuously monitors the internal voltage of the battery. When the voltage drops to the safety threshold or the voltage is abnormal, a signal is issued. At this time, the circuit breaker 53 opens and stops the discharge. Finally, the AC220V main power supply is turned off. Discharge circuit description: The positive current of the battery passes through the input terminal of the circuit breaker 53 and enters the positive DC input terminal of the solid-state relay 54 from the output terminal of the circuit breaker 53. Finally, it enters the interior of the braking resistor 2 through the negative DC input terminal of the circuit breaker 53. The negative current of the battery directly enters the interior of the braking resistor 2 from the other end of the braking resistor 2, thus realizing discharge.

[0023] Example 2: Basically the same as Example 1, but with a further improvement: the propulsion assembly 6 includes a pressing plate 61 rotatably connected to the surface of the electrical contact base 55. Both sides of the pressing plate 61 have arc-shaped top grooves 62. Both sides of the electrical contact head 56 are fixedly connected to connecting posts 63. The arc-shaped top grooves 62 are fitted onto the surfaces of the connecting posts 63. The top of the electrical contact base 55 has a rectangular sliding groove 64. A limiting plate 65 is slidably connected to the inner cavity of the rectangular sliding groove 64. The top of the pressing plate 61 has a limiting slot 66. The limiting plate 65 engages with the inner cavity of the limiting slot 66. A spring 67 is provided in the inner cavity of the rectangular sliding groove 64. One end of the spring 67 is in close contact with the limiting plate 65, and the other end of the spring 67 is in close contact with the rectangular sliding groove 64. With the inner walls in close contact, the assembly 6, including the extrusion plate 61, the arc-shaped top groove 62, and the connecting post 63, pulls the electrical head 56, allowing it to advance further towards the electrical base 55. This causes the electrical contact spring 58 to engage tightly with the electrical contact arc piece 59 after being compressed, increasing the conductive area and ensuring electrical connection stability. The spring 67 and the rectangular slide 64 work together to elastically advance the limiting plate 65, allowing it to actively engage in the inner cavity of the limiting groove 66, limiting and locking the extrusion plate 61. This effectively ensures that the extrusion plate 61 is in the locked position, improving the connection stability between the electrical head 56 and the electrical base 55.

[0024] Example 3: Basically the same as Example 1, but further: The support assembly 7 includes threaded support rods 71 ​​located on both sides of the braking resistor 2. Each side of the threaded support rod 71 is provided with a heat-insulating plug 72, which is tightly fitted to the inner walls of the braking resistor 2 and the housing 1, respectively. An L-shaped support plate 74 is fitted onto the surface of the threaded support rod 71. Two fixing bolts 76 are installed through the side of the L-shaped support plate 74 away from the insulating junction box 3. The insulating junction box 3 is fixedly connected to the surface of the L-shaped support plate 74 through the fixing bolts 76. The end of the threaded support rod 71 away from the braking resistor 2 extends to the outside of the housing 1 and is threaded. The first nut 73 is connected to the threaded support rod 71, and the second nut 75 is threadedly connected to both sides of the L-shaped support plate 74. Through the setting of the support assembly 7, the threaded support rod 71 and the first nut 73 work together to support and fix the braking resistor 2. At the same time, the heat insulation plug 72 provides heat insulation for the heat generated by the braking resistor 2, preventing heat conduction. It also has an insulating function, effectively preventing leakage. With the cooperation of the L-shaped support plate 74 and the second nut 75, the insulating junction box 3 is supported and fixed, ensuring the installation stability of the insulating junction box 3.

[0025] In summary, this battery residual charge resistive discharge system, through the cooperation of the housing 1 and the support component 7, supports and fixes multiple braking resistors 2. At the same time, with the cooperation of the insulating junction box 3 and the power connection component 4, multiple braking resistors 2 are connected to the ground. Finally, with the cooperation of the discharge component 5 and the propulsion component 6, the residual charge inside the battery is discharged. This achieves the purpose of tight and stable grounding, rapid voltage release, and effective reduction of circuit failure rate.

[0026] The technical features disclosed above are not limited to the combinations of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A resistive discharge system for residual battery charge, characterized in that, The system includes a housing (1): multiple braking resistors (2) are distributed in the inner cavity of the housing (1), four insulating junction boxes (3) are provided on both sides of the inner cavity of the housing (1), a power connection assembly (4) is provided in the inner cavity of the housing (1), the power connection assembly (4) includes two terminals (41), arc-shaped slots (42) are provided on the top and bottom of the insulating junction box (3), the terminals (41) are engaged in the inner cavity of the arc-shaped slots (42), multiple conductive plates (43) are welded on the surface of the terminals (41), the conductive plates (43) penetrate into the inner cavity of the insulating junction box (3), and a conductive short rod (44) is provided through one side of the insulating junction box (3). The conductive long rod (45) is provided with a power receiving sleeve (46) on both sides of the surface of the braking resistor (2). A screw (47) is provided through the opening of the power receiving sleeve (46). The ends of the conductive short rod (44) and the conductive long rod (45) away from the insulating junction box (3) are fixedly connected to the power receiving sleeve (46) through the screw (47). Two connecting bolts (48) are provided through the side of the insulating junction box (3) away from the braking resistor (2). The conductive short rod (44) and the conductive long rod (45) are fixedly connected to the conductive sheet (43) through the connecting bolts (48) to the bottom end of the insulating junction box (3). Discharge components (5) are provided at both ends of the front side of the housing (1).

2. The battery residual charge resistive discharge system according to claim 1, characterized in that, The discharge assembly (5) includes a switching power supply (51) fixedly installed on the front side of the housing (1). From left to right, the front side of the housing (1) is equipped with a voltage protector (52), two circuit breakers (53) and a solid-state relay (54). Both ends of the front side of the housing (1) are fixedly installed with a power connector (55). A power connector (56) is inserted into the inner cavity of the power connector (55). A reinforcing conductive sleeve (57) is fixedly connected to the inner cavity of the power connector (55). Both sides of the reinforcing conductive sleeve (57) are stamped and integrally formed with a power contact spring (58). Both sides of the inner cavity of the power connector (56) are embedded and fixedly connected with a power contact arc piece (59) that matches the power contact spring (58). Both ends of the front side of the housing (1) are provided with a propulsion assembly (6). Both sides of the braking resistor (2) are provided with a support assembly (7).

3. A battery residual charge resistive discharge system according to claim 2, characterized in that, The front end of the terminal (41) on the left is electrically connected to the negative terminal of the DC output of the solid-state relay (54), the positive terminal of the DC output of the solid-state relay (54) is electrically connected to the output terminal of the circuit breaker (53), the input terminal of the circuit breaker (53) is electrically connected to the left-side electrical connector (55), and the right-side electrical connector (55) is electrically connected to the terminal (41) on the right.

4. A battery residual charge resistive discharge system according to claim 3, characterized in that, The propulsion assembly (6) includes an extrusion plate (61) rotatably connected to the surface of the power connector (55). Both sides of the surface of the extrusion plate (61) are provided with arc-shaped top grooves (62). Both sides of the power connector (56) are fixedly connected with connecting posts (63). The arc-shaped top grooves (62) are sleeved on the surface of the connecting posts (63).

5. A battery residual charge resistive discharge system according to claim 4, characterized in that, The top of the power connector (55) is provided with a rectangular slide groove (64), and the inner cavity of the rectangular slide groove (64) is slidably connected to a limiting plate (65). The top of the extrusion plate (61) is provided with a limiting groove (66), and the limiting plate (65) is engaged in the inner cavity of the limiting groove (66).

6. A battery residual charge resistive discharge system according to claim 5, characterized in that, The inner cavity of the rectangular slide groove (64) is provided with a spring (67). One end of the spring (67) is in close contact with the limiting plate (65), and the other end of the spring (67) is in close contact with the inner wall of the rectangular slide groove (64).

7. A battery residual charge resistive discharge system according to claim 6, characterized in that, The support assembly (7) includes threaded support rods (71) located on both sides of the braking resistor (2). Heat insulation plugs (72) are provided on both sides of the surface of the threaded support rods (71). The two heat insulation plugs (72) are tightly fitted to the inner walls of the braking resistor (2) and the housing (1), respectively.

8. A battery residual charge resistive discharge system according to claim 7, characterized in that, The surface of the threaded support rod (71) is fitted with an L-shaped support plate (74). Two fixing bolts (76) are provided through the side of the L-shaped support plate (74) away from the insulating junction box (3). The insulating junction box (3) is fixedly connected to the surface of the L-shaped support plate (74) by the fixing bolts (76).

9. A battery residual charge resistive discharge system according to claim 8, characterized in that, The threaded support rod (71) extends from the brake resistor (2) to the outside of the housing (1) and is threaded with a first nut (73). The threaded support rod (71) is threaded with a second nut (75) on both sides of the L-shaped support plate (74).

10. A battery residual charge resistive discharge system according to claim 9, characterized in that, The front and rear sides of the housing (1) are provided with multiple heat dissipation holes (8), and four air-cooled radiators (9) are fixedly installed on the front and rear sides of the housing (1). The air-cooled radiators (9) are located at the heat dissipation holes (8).

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