Conductive connection structure for new energy lithium battery

Abstract

The invention relates to the technical field of lithium batteries, in particular to a conductive connection structure for new energy lithium batteries, which comprises a tray, a cover plate, batteries and a parallel connection device, mounting grooves for mounting the batteries are formed in the tray, a partition plate is arranged between every two adjacent mounting grooves, the parallel connection device is mounted on the center line of the tray, and the batteries on one side of the parallel connection device form a battery pack. Through the arrangement of the circuit breaking assembly, when the batteries in the corresponding battery pack are expanded and deformed due to charging and discharging, the triggering piece in the partition plate moves by a corresponding expansion distance, and when the expansion deformation of the batteries reaches a set value, the movable plate pushes the insulating pin into the space between the conducting strips, so that the parallel connection relation between the battery pack and the adjacent battery pack is cut off; therefore, the adjacent batteries are not influenced while the damaged batteries are not continuously used, so that the life safety of operators and the overall performance and the service life of other batteries in the battery pack are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a conductive connection structure for new energy lithium batteries. Background Art

[0002] With the rapid development of new energy technology and the electric vehicle industry, lithium batteries have been widely used in energy storage systems and electric vehicles due to their high energy density, long cycle life and green environmental protection. However, in actual application, the battery blocks that constitute the battery pack face a variety of potential failure mechanisms during long-term use and charging cycles. Battery bulging is a common type of failure with potential safety hazards. After long-term use, the battery blocks in existing blade lithium batteries change the structure of the positive and negative active materials inside the battery due to the wear and aging of the battery blocks themselves, which in turn triggers side reactions to increase the gas production inside the battery blocks, causing the battery shell to slowly deform and bulge. At the same time, overcharging the lithium battery in a short period of time or being impacted by the outside world will cause an internal short circuit in the battery, causing local high temperature, and also causing the battery block to bulge rapidly. When the battery block bulges, if it cannot be identified in time and the power-off measures cannot be taken, continuing to charge and discharge the battery block will increase the internal pressure, which will cause the battery to rupture, leak electrolyte, or even catch fire and explode, posing a direct threat to the life safety of electric vehicle operators equipped with blade lithium batteries, and will also affect the overall performance and service life of the battery pack.

[0003] The prior art provides some solutions to the above problems. For example, the invention disclosed in patent application number CN202410791306.7 provides a lithium battery with a fire extinguishing structure. This solution clearly drives the limit rod to move by a piston straight rod, so as to achieve the purpose of quickly releasing the limit of the support plate, so that the lithium battery block can be quickly moved to release the connection with the conductive block, thereby preventing the lithium battery block from being charged and discharged in the case of bulging, causing leakage and fire of the lithium battery block, and affecting the personal safety of the vehicle operator. The sliding plate in the bulge detection mechanism drives the pull rope to move, so as to achieve the purpose of quickly measuring the bulging of the side wall of the lithium battery block, thereby ensuring the accuracy and rapidity of the device in measuring the bulging of the lithium battery block. The first sliding plate and the first sliding plate in the fire judgment mechanism are used. The movement of the two sliding plates can achieve the purpose of determining whether the lithium battery block in the installation shell is on fire, thereby ensuring the stability and accuracy of the device in handling different situations. However, the pull rope in this scheme is always kept taut on the battery shell. During a long period of standby, the elasticity of the pull rope will inevitably decrease. After the battery shell expands, the movement distance of the pull rope deviates from the original set value, which may lead to a decrease in the detection accuracy of the bulge detection mechanism. In addition, the structures of the bulge detection mechanism and the fire determination mechanism are complex, occupying space around the battery shell, and the installation complexity is relatively high. The coordination of multiple components and the impact force of the road on the car in daily use will also cause errors in the coordination between the components, which may lead to failure of the mechanism. Summary of the invention

[0004] The purpose of the present invention is to provide a conductive connection structure for a new energy lithium battery, so as to solve the problem that when a battery block bulges, if it cannot be identified in time and power-off measures cannot be taken, continuing to charge and discharge the battery block will aggravate the internal pressure, thereby causing the battery to rupture, leak electrolyte, or even catch fire and explode; when the above-mentioned problems occur in the conductive connection structure for a new energy lithium battery, it poses a direct threat to the life safety of operators of electric vehicles equipped with lithium batteries, and will also affect the overall performance and service life of the battery pack, while solving the shortcomings of the existing technical solutions.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A conductive connection structure for a new energy lithium battery comprises a tray, a cover plate, a battery and a parallel connector. A plurality of mounting slots for mounting batteries are provided in the tray, and partitions are provided between adjacent mounting slots. The parallel connector is installed on the center line of the tray. The batteries on one side of the parallel connector form a battery pack, and the battery packs on both sides are connected in parallel through the parallel connector. The cover plate covers and protects the batteries. The parallel connector is characterized in that a conductive sheet is provided in the parallel connector, one end of the conductive sheet is connected to an external circuit, and the other two ends are respectively connected to the battery packs on both sides. A disconnecting assembly is also provided in the parallel connector, and the disconnecting assembly comprises insulating pins and a trigger member symmetrically arranged on both sides of the parallel connector. When the battery expands due to charging and discharging and reaches a set value of the deformation amount, the trigger member uses Hooke's law to cause the insulating pin to be subjected to elastic force and inserted between the conductive sheets.

[0007] By setting a circuit breaker component in the battery pack parallelizer, when the batteries in the corresponding battery pack expand and deform due to charging and discharging, the movable plate in the partition drives the movable plate to move the corresponding expansion distance. When the expansion deformation of the battery reaches the set value, the movable plate pushes the insulating pin between the conductive plates, thereby cutting off the parallel relationship between the battery pack and the adjacent battery pack, thereby avoiding the damaged battery from being used anymore, and the adjacent batteries and electric vehicles will not be affected, thereby ensuring the life safety of the operator and the overall performance and service life of other batteries in the battery pack.

[0008] Preferably, the circuit-breaking assembly includes circuit-breaking grooves opened on both sides of the parallelizer, the conductive sheet is located at the deepest part of the circuit-breaking groove, and a movable plate is slidably connected in the cover plate, one end of the movable plate abuts against the insulating pin and the other end is connected to the cover plate frame through a spring, the lower end surface of the movable plate abuts against the partition and an inclined groove is opened at the abutting point, the trigger member is arranged in the hollow structure of the partition, the trigger member includes a spring leaf and a movable plate, the movable plate is slidably connected in the partition, the spring leaf is arc-shaped, one protruding end of which abuts against the movable plate, and the other end is connected to the inner wall of the partition, the contact surface between the partition and the movable plate is also provided with an inclined surface inclined toward the direction of the parallelizer, and the upper and lower end surfaces of the movable plate are both provided with guide surfaces abutting against the inclined surface and the inclined groove.

[0009] It is easy to understand that, according to the shape of the lithium battery, the partitions with corresponding intervals are set. When the battery expands due to charging and discharging, the expansion of the battery tends to be released in the direction of the minimum pressure, that is, the direction corresponding to the movable plate. The movable plate moves toward the inner wall of the partition against the thrust of the spring due to the deformation of the battery. The guide surface on the movable plate moves along the inclined surface, so that the movable plate achieves an oblique upward displacement in the process of moving toward the inner wall of the partition, so that the guide surface on the other side of the movable plate gradually coincides with the inclined groove, and resists the pulling force of the spring to move the movable plate into the circuit breaker groove by a corresponding battery deformation distance until the set value of the battery deformation expansion is reached. The movable plate continues to move to insulate the insulation The pin is pushed toward the conductive sheet. In the process of the insulating pin passively approaching the conductive sheet, the compression spring is continuously compressed. As the insulating pin moves, the compression spring rotates at the same time until the rotation angle of the compression spring is greater than 90°. The insulating pin is instantly inserted between the conductive sheets by the elastic force of the compression spring, so that the connection between the battery pack on the problematic side and the parallel connector is disconnected. The internal circuit breaker component ensures a compact structure. In daily use, the impact force of the road on the car will not cause false triggering between components, thereby avoiding failure of the connecting mechanism, thereby ensuring the safety of personnel, as well as the overall performance and service life of the battery pack.

[0010] Preferably, the circuit breaker assembly includes a circuit breaker groove opened on both sides of the parallel device, the conductive sheet is located at the deepest part of the circuit breaker groove, and a movable plate is slidably connected in the cover plate, one end of the movable plate abuts against the insulating pin and the other end is connected to the cover plate frame through a spring, the trigger member is arranged in the hollow structure of the partition, the trigger member includes a spring leaf and a movable plate, the movable plate is slidably connected in the partition, the spring leaf is arc-shaped, the spring leaf abuts against the battery, the movable plate is arranged between the mounting groove and the spring leaf, the lower end surface of the movable plate abuts against the movable plate and an inclined groove is opened at the abutment, the mounting groove has a honeycomb structure and a contact surface with the movable plate is also provided with an inclined surface inclined toward the direction of the parallel device, and the upper and lower end surfaces of the movable plate are both provided with guide surfaces abutting against the inclined surface and the inclined groove.

[0011] It is easy to understand that when the battery is cylindrical, the expansion direction of the battery is unpredictable. By setting the mounting groove into a honeycomb structure, while meeting the battery arrangement requirements, by setting the movable plate in the spring leaf, the battery is fixed by the abutment of the spring leaf after being placed in the mounting groove. When any side edge surface of the cylindrical battery expands, the movable plate is squeezed toward the mounting groove frame due to the deformation of the spring leaf. During the movement, the guide surface on the movable plate moves along the inclined surface, so that the movable plate is displaced obliquely upward in the process of moving toward the inner wall of the partition, so that the guiding surface on the other side of the movable plate gradually coincides with the inclined groove, and resists the tension of the spring to move the movable plate into the circuit breaker groove by a corresponding battery deformation distance until the set value of the battery deformation expansion is reached. The movable plate continues to move to push the insulating pin toward the conductive sheet, thereby ensuring the applicability of the connecting device to different batteries.

[0012] Preferably, a groove is also provided at the opening of the circuit-breaking groove, and a ratchet and a ball are provided in the groove. The ratchet is arc-shaped and one end close to the opening of the circuit-breaking groove is hinged to the opening of the groove. The ball is located in the groove and abuts against the lower end surface of the ratchet. The edge of the movable plate is also provided with a ratchet that cooperates with the ratchet.

[0013] It is easy to understand that since the battery will be affected by the inertia force of the car, the position of the battery that has been deformed but not reached the set value and the battery that has reached the deformation set value will change, making the displacement of the movable plate inaccurate. The instantaneous inertia drives the change of the ball position, so that when the movable plate moves too fast under the instantaneous force, the ratchet bar will tilt and cooperate with the ratchet tooth, which can instantly lock the abnormal movement of the movable plate into the circuit breaker groove, thereby ensuring the movement accuracy of the movable plate, and then ensuring the triggering accuracy of the circuit breaker assembly after the battery expands.

[0014] Preferably, a self-locking groove is also provided at the rear end of the circuit-breaking groove, and a self-locking pin is slidably connected in the self-locking groove. One end of the self-locking pin abuts against the ratchet and the other end is connected to the self-locking groove through a spring. The self-locking pin is trapezoidal and the trapezoidal slope is inclined toward the opening direction of the circuit-breaking groove.

[0015] It is easy to understand that since the battery will be affected by the inertia force of the car, the position of the battery that has been deformed but not reached the set value and the battery that has reached the deformation set value will change, making the displacement of the movable plate inaccurate. At the same time, the coordinated locking of the locking pin and the ratchet can prevent the movable plate from being unable to retract when moving into the circuit breaker groove after the battery expands, thereby ensuring that the change in position of the battery after being subjected to the inertia force will not affect the displacement accuracy of the movable plate, thereby preventing the battery that has not reached the set value from expanding and shrinking its diameter instantly, directly cutting off the connection of the corresponding battery pack, thereby causing an unnecessary reduction in battery mileage, and thus ensuring the triggering accuracy of the circuit breaker assembly.

[0016] Preferably, a compression spring is further provided in the installation groove located in the middle of the insulating pin, and the upper and lower ends of the compression spring are hinged to the insulating pin and the inner wall of the installation groove respectively.

[0017] It is easy to understand that since the displacement of the movable plate is progressive rather than instantaneous, the separation of the conductive sheet is also progressive and gradual, which reduces the cross-sectional area through which the current passes, resulting in local heating of the conductive sheet and unstable current. The compression spring is hinged to the insulating pin and the mounting groove, so that when the insulating pin is pushed toward the conductive sheet by the movable plate, the compression spring is in a stretching-compression-stretching state. When the deformation of the battery causes the compression spring to be in a compressed state, as the battery further deforms to meet the set value, the compression spring changes from compression to tension. In the above process, the insulating pin is affected by the elastic potential energy of the compression spring to achieve the purpose of instantly isolating the conductive sheet, thereby avoiding the gradual separation of the conductive sheet, which reduces the cross-sectional area through which the current passes, resulting in local heating of the conductive sheet and unstable current, thereby ensuring the normal use of the battery pack when the battery is not completely damaged.

[0018] Preferably, the partition is a detachable structure, the bottom structure of the partition is L-shaped, the battery is installed at a right angle of the L-shaped structure, and a protective cover made of thermal conductive silicone is also provided on the contact surface between the partition and the battery, and the protective cover is honeycomb-shaped.

[0019] It is easy to understand that when the battery is deformed, due to the close fit between the battery and the partition, the damaged battery is not easy to find and remove and replace. After the staff opens the cover, they can observe whether there is a gap between the movable plate and the partition, so as to conveniently check the status of the battery. After finding the damaged battery, the partition and the battery can be taken out together through the gap, thus completing the removal and replacement of the battery, thereby reducing the workload of personnel and the difficulty of installation and removal.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention sets a circuit breaker assembly in the battery pack paralleler. When the battery in the corresponding battery pack expands and deforms due to charging and discharging, the movable plate in the partition drives the movable plate to move the corresponding expansion distance. When the expansion deformation of the battery reaches a set value, the movable plate pushes the insulating pin between the conductive plates, thereby cutting off the parallel relationship between the battery pack and the adjacent battery pack, thereby avoiding the damaged battery from being used anymore, and the adjacent batteries and electric vehicles will not be affected, thereby ensuring the life safety of the operator and the overall performance and service life of other batteries in the battery pack.

[0022] 2. The present invention sets a locking pin and a ratchet. Since the battery will be affected by the inertia force of the car, which will cause the battery position to change, resulting in inaccurate displacement of the movable plate. The instantaneous inertia drives the change of the ball position, so that when the movable plate moves too fast under the instantaneous force, the ratchet will tilt and cooperate with the ratchet teeth, which can instantly lock the movable plate from moving into the circuit breaker groove. At the same time, the cooperation between the locking pin and the ratchet teeth can prevent the battery from moving out of the circuit breaker groove due to the change of the battery position after expansion, thereby ensuring the triggering accuracy of the circuit breaker assembly after the battery expands.

[0023] 3. The present invention provides a compression spring hinged to the insulating pin and the mounting groove. When the insulating pin is pushed toward the conductive sheet by the movable plate, the compression spring is in a stretching-compression-stretching state. When the deformation of the battery causes the compression spring to be in a compressed state, as the battery further deforms to meet the set value, the compression spring changes from a compressed state to a stretched state. In the above process, the insulating pin is affected by the elastic potential energy of the compression spring to achieve instantaneous ejection to isolate the conductive sheet, thereby avoiding the gradual separation of the conductive sheet, reducing the cross-section through which the current passes, and causing local heating of the conductive sheet and unstable current.

[0024] 4. The present invention arranges the partition into an L-shaped structure of a disassembly structure. Due to the close fit between the battery and the partition, when the battery is deformed, the damaged battery is not easy to find and remove and replace. After the staff opens the cover, they can observe whether there is a gap between the movable plate and the partition, thereby conveniently checking the status of the battery. After finding the damaged battery, the partition and the battery can be taken out together through the gap, thereby removing and replacing the battery, thereby reducing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the conductive connection structure for the new energy lithium battery of the present invention;

[0026] Figure 2 A schematic diagram of the structure of the battery pack connected through parallel components after the cover plate is removed;

[0027] Figure 3 for Figure 2 Full cross-section at the middle AA;

[0028] Figure 4 for Figure 3 The structure enlarged diagram of the trigger component at B in the middle;

[0029] Figure 5 for Figure 3 The structure enlarged diagram of the trigger component at C in the middle;

[0030] Figure 6 for Figure 2 Full cross-section of the parallel connection at DD in the middle;

[0031] Figure 7 for Figure 6 The enlarged view of the structure at E in the middle;

[0032] Figure 8 It is a schematic diagram of the arrangement structure of the spring leaf and the movable plate when the cylindrical battery is non-directionally expanded in the second embodiment.

[0033] In the figure: 1. tray; 101. mounting groove; 102. self-locking groove; 103. self-locking pin; 104. partition; 105. inclined groove; 106. inclined surface; 107. protective cover; 2. cover plate; 201. movable plate; 202. ratchet; 3. battery pack; 301. battery; 4. parallel connector; 401. conductive sheet; 5. circuit breaker assembly; 501. insulating pin; 502. trigger member; 503. spring; 504. movable plate; 505. guide surface; 506. circuit breaker groove; 507. groove; 5071. ratchet; 5072. ball; 6. compression spring. DETAILED DESCRIPTION

[0034] The present invention provides a conductive connection structure for a new energy lithium battery, and the technical solution is as follows:

[0035] For example, see Figures 1 to 7 , this embodiment is used for a blade-type battery, including a tray 1, a cover plate 2, a battery 301 and a parallel connector 4. A plurality of mounting slots 101 for mounting the battery 301 are provided in the tray 1, and a partition plate 104 is provided between adjacent mounting slots 101. The parallel connector 4 is installed on the center line of the tray 1. The batteries 301 on one side of the parallel connector 4 form a battery group 3. The battery groups 3 on both sides are connected in parallel through the parallel connector 4. The cover plate 2 covers and protects the battery 301. Specifically, a conductive sheet 401 is provided in the parallel connector 4. One end of the conductive sheet 401 is connected to an external circuit, and the other two ends are respectively connected to the battery groups 3 on both sides. A circuit breaker component 5 is also provided in the parallel connector 4. The circuit breaker component 5 includes insulating pins 501 and a trigger member 502 symmetrically arranged on both sides of the parallel connector 4. When the battery 301 expands due to charging and discharging and reaches a set value of the deformation, the trigger member 502 uses Hooke's law to cause the insulating pin 501 to be subjected to elastic force and inserted between the conductive sheets 401.

[0036] See also Figures 1 to 7The circuit breaker assembly 5 includes a circuit breaker groove 506 opened on both sides of the parallel 4, and the conductive sheet 401 is located at the deepest part of the circuit breaker groove 506. A movable plate 201 is also slidably connected in the cover 2. One end of the movable plate 201 abuts against the insulating pin 501 and the other end is connected to the frame of the cover 2 through a spring. The lower end surface of the movable plate 201 abuts against the partition 104 and an inclined groove 105 is opened at the abutment. The trigger member 502 is arranged in the hollow structure of the partition 104. The trigger member 502 includes a spring leaf 503 and a movable plate 504. The movable plate 504 is slidably connected in the partition 104. The spring leaf 503 is in an arc shape, and one protruding end thereof abuts against the movable plate 504, and the other end is connected to the inner wall of the partition 104. The contact surface between the partition 104 and the movable plate 504 is also provided with an inclined surface 106 inclined toward the direction of the parallel 4. The upper and lower end surfaces of the movable plate 504 are both provided with a contact with the inclined surface 106. 6 and the guide surface 505 abutting against the inclined groove 105, a groove 507 is also provided at the opening of the circuit-breaking groove 506, a ratchet 5071 and a ball 5072 are provided in the groove 507, the ratchet 5071 is arc-shaped and one end close to the opening of the circuit-breaking groove 506 is hinged to the opening of the groove 507, the ball 5072 is located in the groove 507 and abuts against the lower end surface of the ratchet 5071, and a ratchet 202 matching the ratchet 5071 is also provided at the edge of the movable plate 201, a self-locking groove 102 is also provided at the rear end of the circuit-breaking groove 506, a self-locking pin 103 is also slidably connected in the self-locking groove 102, one end of the self-locking pin 103 abuts against the ratchet 202 and the other end is connected to the self-locking groove 102 through a spring, a compression spring 6 is also provided in the mounting groove 101 located in the middle of the insulating pin 501, and the upper and lower ends of the compression spring 6 are respectively hinged to the insulating pin 501 and the mounting groove 101.

[0037] See also Figure 3 to Figure 4 The partition 104 is a detachable structure, the bottom structure of the partition 104 is L-shaped, the battery 301 is installed at a right angle to the L-shaped structure, and a protective cover 107 made of thermal conductive silicone is also provided on the contact surface between the partition 104 and the battery 301, and the protective cover 107 is honeycomb-shaped.

[0038] See also Figures 1 to 7 , the partition 104 is arranged in a mirror image in the installation groove 101 along the center line of the tray 1, and a single battery 301 is installed in the right angle of the L-shaped structure of the partition 104 and is connected in series with the adjacent battery 301 through a connecting piece. Since the parallelizer 4 is arranged on the center line of the tray 1, the partition 104 arranged in a mirror image along the center line divides the battery 301 into different battery groups 3 on both sides according to the direction of the partition 104. The total positive and total negative of the battery groups 3 on both sides are output in parallel through the conductive sheets 401 on both sides of the parallelizer 4, and the cover plate 2 covers and protects the battery 301.

[0039] The partitions 104 are arranged with corresponding intervals according to the shape of the lithium battery 301. When the battery 301 expands due to charging and discharging, the expansion of the battery 301 tends to be released in the direction of the minimum pressure, that is, in the direction corresponding to the moving plate 504. The moving plate 504 moves toward the inner wall of the partition 104 against the thrust of the spring sheet 503 due to the deformation of the battery 301. The guide surface 505 on the moving plate 504 moves along the inclined surface 106, so that the moving plate 504 achieves an oblique upward displacement in the process of moving toward the inner wall of the partition 104, so that the guide surface 505 on the other side of the moving plate 504 gradually overlaps with the inclined groove 105 and resists the spring. The pulling force moves the movable plate 201 into the circuit breaker slot by a corresponding deformation distance of the battery 301 until the set value of the deformation and expansion of the battery 301 is reached. The movable plate 201 continues to move to push the insulating pin 501 toward the conductive sheet 401. In the process of the insulating pin 501 passively approaching the conductive sheet 401, the compression spring 6 is continuously compressed. As the insulating pin 501 moves, the compression spring 6 rotates at the same time until the rotation angle of the compression spring 6 is greater than 90°. The insulating pin 501 is instantly inserted between the conductive sheets 401 by the elastic force of the compression spring 6, thereby disconnecting the battery pack 3 on the problematic side from the parallelizer 4.

[0040] Since the battery 301 is used in a car, it will be restricted by the road conditions when the car is driving, causing the car to be in a state of up and down bumps, instant acceleration and sudden braking. When the car is subject to up and down bumps, the protective cover 107 made of thermal conductive silicone is arranged on the partition 104, and its honeycomb shape is further deformed to reduce the vertical bumps of the battery 301, and absorb part of the heat generated by the charging and discharging of the battery 301, thereby ensuring the stability of the battery 301. When the battery 301 is subjected to instant lateral acceleration, the thermal conductive silicone and the battery 301 are The instantaneous friction force on the contact surface increases, thereby providing a certain buffer to the battery 301; when the car is in a congested section of the road, it is often subjected to instantaneous acceleration and emergency braking, and the battery 301 moves forward and backward due to inertia. When the battery 301 in the battery pack 3 expands, its expanded diameter also changes continuously due to inertia. When the deformation of the battery 301 reaches the set value, due to the inertia of the battery 301, the insulating pin 501 may not be able to accurately cut off the conductive sheet 401, thereby reducing the accuracy of the assembly. A groove 507 is also provided at the mouth, and a ratchet 5071 and a ball 5072 are arranged inside. When the car is running smoothly, the ball 5072 is restricted by the arc surface of the ratchet 5071 in the groove 507 and fixed. When emergency braking is performed, the ball 5072 moves toward the other end of the groove 507 due to inertia, so that the ratchet 5071 is tilted, and the inertia of the moving plate 504 moving into the circuit breaker groove 506 is blocked by the cooperation of the ratchet 5071 and the ratchet 202; at the same time, a self-locking groove 102 is provided, and a self-locking pin 1 connected by sliding in the self-locking groove 102 is 03. When the movable plate 201 moves a corresponding distance due to the expansion of the battery 301, the self-locking pin 103 and the ratchet 202 are locked, so that the movable plate 201 cannot retract during the movement into the disconnecting groove 506, thereby ensuring that the change in position of the battery 301 after being subjected to the inertial force will not affect the displacement accuracy of the activity, thereby avoiding the instantaneous expansion or contraction of the diameter of the battery 301 that does not reach the set value, directly cutting off the connection of the corresponding battery pack 3, thereby causing an unnecessary reduction in the mileage of the battery 301, thereby ensuring the accuracy of the assembly.

[0041] When a damaged battery 301 needs to be replaced, the damaged battery 301 is difficult to be seen with the naked eye due to the close fit between the battery 301 and the partition 104. After the cover plate 2 is removed, it can be directly observed whether there is a gap between the partition 104 and the movable plate 504, thereby judging the battery 301 that needs to be replaced, and the partition 104 and the battery 301 are pulled out of the battery pack 3 together through the gap. After removing the damaged battery 301, the partition 104 is first put back into the installation slot 101, and then the new battery 301 is inserted into the L-shaped area on the partition 104, thereby completing the quick inspection and installation and replacement of the battery 301.

[0042] Embodiment 2, as Figures 1 to 8 As shown, this embodiment is applicable to cylindrical batteries, specifically as follows:

[0043] Compared with the first embodiment, the second embodiment has a honeycomb structure in which the mounting groove 101 is in contact with the spring sheet 503 and the battery 301, and the movable plate 504 is disposed between the mounting groove 101 and the spring sheet 503. When the battery 301 is cylindrical, the expansion direction of the battery 301 is unpredictable. By setting the mounting groove 101 in a honeycomb structure, the arrangement requirements of the battery 301 are met, and by setting the movable plate 504 in the spring sheet 503, the battery 301 is fixed by the contact of the spring sheet 503 after being placed in the mounting groove 101. When any side edge of the cylindrical battery 301 expands, the movable plate 504 is squeezed and moved toward the frame of the mounting groove 101 due to the deformation of the spring sheet 503. During the movement, the movable plate 504 is deformed and deformed. The guide surface 505 on the movable plate 504 moves along the inclined surface 106, so that the movable plate 504 achieves an oblique upward displacement in the process of moving toward the inner wall of the partition 104, so that the guide surface 505 on the other side of the movable plate 504 gradually overlaps with the inclined groove 105, and resists the tension of the spring to move the movable plate 201 into the circuit breaker groove by a corresponding deformation distance of the battery 301 until the set value of the deformation expansion of the battery 301 is reached. The movable plate 201 continues to move to push the insulating pin 501 toward the conductive sheet 401.

[0044] The implementation methods not mentioned in the second embodiment are the same as those in the first embodiment and will not be described in detail here.

[0045] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A conductive connection structure for a new energy lithium battery, comprising a tray (1), a cover plate (2), a battery (301) and a parallel connector (4), wherein the tray (1) is provided with a plurality of mounting slots (101) for mounting the battery (301), a partition plate (104) is provided between adjacent mounting slots (101), the parallel connector (4) is installed on the center line of the tray (1), the batteries (301) on one side of the parallel connector (4) are combined into a battery group (3), the battery groups (3) on both sides are connected in parallel through the parallel connector (4), the cover plate (2) covers and protects the battery (301), and is characterized in that: The parallel connector (4) is provided with a conductive sheet (401), one end of the conductive sheet (401) is connected to an external circuit, and the other two ends are respectively connected to the battery packs (3) on both sides. The parallel connector (4) is also provided with a circuit breaker assembly (5), and the circuit breaker assembly (5) comprises insulating pins (501) and a trigger element (502) symmetrically arranged on both sides of the parallel connector (4). When the battery (301) expands due to charging and discharging and reaches a set value of the deformation amount, the trigger element (502) uses Hooke's law to cause the insulating pin (501) to be subjected to elastic force and inserted between the conductive sheets (401).

2. A conductive connection structure for a new energy lithium battery according to claim 1, characterized in that: The circuit breaker assembly (5) comprises circuit breaker grooves (506) provided on both sides of the parallel connector (4); the conductive sheet (401) is located at the deepest part of the circuit breaker groove (506); a movable plate (201) is slidably connected inside the cover plate (2); one end of the movable plate (201) is in contact with the insulating pin (501) and the other end is connected to the frame of the cover plate (2) via a spring; the trigger member (502) is provided in the hollow structure of the partition plate (104); the trigger member (502) comprises a spring sheet (503) and a movable plate (504); the movable plate (504) is slidably connected to the partition plate (104), the spring sheet (503) is in an arc shape, one protruding end of which abuts against the movable plate (504), and the other end is connected to the inner wall of the partition (104); the lower end surface of the movable plate (201) abuts against the movable plate (504) and an inclined groove (105) is provided at the abutting point; the contact surface between the partition (104) and the movable plate (504) is also provided with an inclined surface (106) inclined toward the direction of the parallel connector (4); the upper and lower end surfaces of the movable plate (504) are both provided with guide surfaces (505) abutting against the inclined surface (106) and the inclined groove (105).

3. A conductive connection structure for a new energy lithium battery according to claim 1, characterized in that: The circuit breaker assembly (5) comprises circuit breaker grooves (506) provided on both sides of the parallel connector (4); the conductive sheet (401) is located at the deepest part of the circuit breaker groove (506); a movable plate (201) is slidably connected in the cover plate (2); one end of the movable plate (201) is in contact with the insulating pin (501) and the other end is connected to the frame of the cover plate (2) via a spring; the trigger member (502) is provided in the hollow structure of the partition plate (104); the trigger member (502) comprises a spring leaf (503) and a movable plate (504); the movable plate (504) is slidably connected in the partition plate (104); the spring leaf (503) The spring sheet (503) is in arc shape, abutting against the battery (301), the movable plate (504) is arranged between the mounting groove (101) and the spring sheet (503), the lower end surface of the movable plate (201) abuts against the movable plate (504) and an inclined groove (105) is provided at the abutting position, the mounting groove (101) is in honeycomb structure and a slope (106) inclined toward the parallel device (4) is provided on the contact surface with the movable plate (504), and the upper and lower end surfaces of the movable plate (504) are both provided with guide surfaces (505) abutting against the slope (106) and the inclined groove (105).

4. A conductive connection structure for a new energy lithium battery according to claim 2 or 3, characterized in that: A groove (507) is also provided at the opening of the disconnect groove (506), and a ratchet (5071) and a ball (5072) are provided in the groove (507). The ratchet (5071) is arc-shaped and one end close to the opening of the disconnect groove (506) is hinged to the opening of the groove (507). The ball (5072) is located in the groove (507) and abuts against the lower end surface of the ratchet (5071). The edge of the movable plate (201) is also provided with a ratchet (202) that matches the ratchet (5071).

5. A conductive connection structure for a new energy lithium battery according to claim 2 or 3, characterized in that: A self-locking groove (102) is also provided at the rear end of the disconnecting groove (506), and a self-locking pin (103) is slidably connected in the self-locking groove (102). One end of the self-locking pin (103) abuts against the ratchet (202) and the other end is elastically connected to the self-locking groove (102). The self-locking pin is trapezoidal in shape and the trapezoidal inclined surface is inclined toward the opening direction of the disconnecting groove.

6. A conductive connection structure for a new energy lithium battery according to claim 2 or 3, characterized in that: A compression spring (6) is also provided in the installation groove (101) located in the middle of the insulating pin (501), and the upper and lower ends of the compression spring (6) are respectively hinged to the insulating pin (501) and the inner wall of the installation groove (101).

7. A conductive connection structure for a new energy lithium battery according to claim 2 or 3, characterized in that: The partition (104) is a detachable structure.

8. A conductive connection structure for a new energy lithium battery according to claim 7, characterized in that: The bottom structure of the partition (104) is L-shaped, and the battery (301) is installed at a right angle of the L-shaped structure. A protective cover (107) made of heat-conductive silica gel is also provided on the contact surface between the partition (104) and the battery (301), and the protective cover (107) is honeycomb-shaped.

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