Battery pack testing electrical connection device and battery pack testing system

Abstract

The application discloses a kind of electric connection device and battery pack test system for battery pack testing, belong to vehicle battery pack testing field.The electric connection device includes: shell, its first end surface is provided with socket, its second end surface is provided with cable connector for being electrically connected with battery pack testing equipment;A pair of conductive metal sheet, install in shell and extend along first direction, the first side end of the conductive metal sheet extends to the socket of the shell;At least a pair of conductive cable, the conductive cable is electrically connected with the conductive metal sheet, and the other end extends to the cable connector on the shell;At least one temperature detection part, install on the conductive metal sheet, for detecting the temperature of conductive metal sheet;Cooling pipe connector, install on the second end surface of the shell.This application is integrated temperature detection part and cooling pipe connector on electric connection device, solve the problem that electric connection device for battery pack testing is prone to heat over-temperature under the condition of large current transmission, significantly improve the use safety and test reliability of electric connection device.

Description

Technical Field

[0001] This invention relates to the field of vehicle battery pack testing, and particularly to an electrical connection device and a battery pack testing system for battery pack testing. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the performance and safety verification of power battery packs, as core components of electric vehicles, is particularly important. During the research, development, production, and maintenance of battery packs, rigorous performance testing using charge-discharge testing equipment is necessary to evaluate key parameters such as capacity, internal resistance, cycle life, and thermal stability.

[0003] In battery pack testing systems, electrical connection devices are crucial components for establishing the electrical connection between the battery pack and the testing equipment. During testing, the battery pack typically needs to withstand high currents (e.g., hundreds of amperes or even higher) during charging and discharging. The conductive components inside the electrical connection device (such as conductive metal sheets and cable connectors) generate significant heat. If this heat cannot be dissipated effectively and promptly, the temperature of the conductive components will continue to rise, potentially leading to increased contact resistance, accelerated aging of insulation materials, oxidation or even melting of metal components. In severe cases, this can cause equipment failure, distorted test data, or even fires. Existing electrical connection devices for battery pack testing generally suffer from the following shortcomings: First, they lack real-time monitoring methods for the operating temperature of conductive components. Operators cannot promptly ascertain the actual temperature rise of the electrical connection device during testing; they can usually only determine whether overheating has occurred through visual inspection or touch after the test. This post-testing method cannot effectively prevent the risk of overheating during testing. Second, they lack active cooling capabilities. Existing electrical connection devices typically rely solely on natural heat dissipation or passive air cooling, resulting in low heat dissipation efficiency and difficulty meeting the heat dissipation requirements under long-term, high-load testing conditions. When the test current is high or the ambient temperature is high, the electrical connection device is prone to overheating, limiting the continuous working capacity and testing efficiency of the test system. Third, judging the connection status relies on the operator's experience. When the battery pack plug is inserted into the electrical connection device, it is difficult for the operator to accurately determine whether the plug is fully inserted. If the plug is not fully inserted before starting the test, it can easily lead to poor contact, localized overheating, or even arcing, posing a safety hazard. Fourth, during the test, the plug is prone to accidentally loosening due to vibration or misoperation, leading to test interruption or unstable connection, affecting the accuracy and reliability of the test data. Summary of the Invention

[0004] Therefore, this invention proposes a battery pack testing electrical connection device that can monitor the temperature of conductive components in real time and has an active cooling function.

[0005] To address the aforementioned technical problems, the present invention provides the following technical solution: A battery pack testing electrical connection device, comprising: The housing has an opening on its first end face and a cable connector on its second end face for electrical connection with the battery pack testing equipment. A pair of conductive metal sheets are installed inside the housing and extend along a first direction, with the first end of the conductive metal sheets extending to the socket of the housing; At least one pair of conductive cables, the conductive cables being electrically connected to the conductive metal sheet, with the other end extending to the cable connector of the housing; At least one temperature sensing unit is mounted on the conductive metal sheet for detecting the temperature of the conductive metal sheet; A cooling pipe connector is installed on the second end face of the housing and is used to connect to the cooling pipe.

[0006] In some embodiments of the present invention, the electrical connection device further includes a switch probe installed inside the housing and an indicator light installed outside the housing. The switch probe extends along a first direction and into the socket. The switch probe is kept in a normally open state. When the electrical connection device is electrically connected to the plug of the battery pack, the battery pack triggers the switch probe to turn on. The indicator light is connected to the switch probe on the same circuit and is used to indicate the switching state of the switch probe.

[0007] In some embodiments of the present invention, the electrical connection device further includes an insulating connection plate installed inside the housing. A set of spaced-apart first connection through holes are formed on the insulating connection plate, through which the conductive metal sheet passes and extends into the socket. The insulating connection plate also includes a second connection through hole, through which the switch probe passes and extends into the socket.

[0008] In some embodiments of the present invention, the housing includes: The main housing has a cavity extending along a first direction, with open ends at opposite ends. The insulating connecting plate is connected to one open end of the main housing, and a wire-passing opening is provided on the top surface of the main housing away from the open end of the insulating connecting plate. The connector end plate is connected to the open end of the main housing near the insulating connecting plate. Its outer end face is provided with a guide slot that is adapted to the plug of the battery pack, and the inner area of ​​the guide slot is provided with the socket. A bottom connecting shell is connected to the open end of the main housing away from the insulating connecting plate, and has sidewalls extending in a second direction; The upper connecting shell is connected to the bottom connecting shell and has an open mouth extending in the second direction, which communicates with the threading opening; A cover plate is attached to the upper connecting shell to cover its opening, and the conductive cable and the cooling pipe connector pass through the cover plate.

[0009] In some embodiments of the present invention, the cover plate is further provided with an adapter socket, and the adapter socket is provided with a plurality of probes, which are suitable for electrical connection with the cables of the temperature detection unit, indicator light and switch probe.

[0010] In some embodiments of the present invention, the outer side of the connector end plate is provided with an annular protrusion structure, and the guide slot is formed within the annular protrusion structure.

[0011] In some embodiments of the present invention, the electrical connection device further includes an anti-disengagement limiting component for engaging with the plug of the battery pack, comprising: An adjustable hook is pivotally connected to the outside of the housing, and has a locking part on one end; An operating unit is connected to the side of the adjustable hook away from the locking part and can operably drive the adjustable hook to pivot around the pivot axis to switch the position of the adjustable hook; The reset element acts on the adjustable latch and is adapted to provide a force to the adjustable latch to maintain the latched position.

[0012] In some embodiments of the present invention, a pivot seat is provided on the upper side of the annular protrusion structure of the connector end plate, and the adjustable hook is L-shaped, with its bent area pivotally connected to the pivot seat. One arm extends along a first direction and forms the locking part at the end, while the other arm extends along a second direction and is connected to the operating part.

[0013] This invention also provides a battery pack testing system, comprising: A battery pack, a battery pack testing device, and the electrical connection device described in any one of the preceding claims; the electrical connection device is adapted to be plugged into the plug of the battery pack to achieve an electrical connection between the battery pack and the battery pack testing device.

[0014] In some embodiments of the present invention, the battery pack testing system further includes an air cooling system and a control unit. The air cooling system includes an air source and a solenoid valve disposed on the cooling pipeline. The cooling system is connected to the electrical connection device through the cooling pipeline. The control unit controls the on / off state of the cooling pipeline according to the detection signal of the temperature detection unit.

[0015] The technical solution of the present invention has the following technical effects compared with the prior art: The battery pack testing electrical connection device provided in this application achieves real-time monitoring of the temperature of the conductive metal sheet by installing a temperature detection unit on the conductive metal sheet. The temperature sensing end of the temperature detection unit directly contacts the surface of the conductive metal sheet, accurately reflecting the actual temperature rise of the conductive metal sheet during high-current transmission. This provides an accurate temperature signal for subsequent overheat protection and cooling control, effectively preventing equipment damage and safety accidents caused by overheating of the conductive metal sheet. A cooling pipe connector is provided on the second end face of the housing, allowing the electrical connection device to connect to an external cooling pipeline. When the temperature detection unit detects that the temperature of the conductive metal sheet exceeds a preset upper limit, the external cooling system can introduce cooling medium into the housing through the cooling pipe connector to forcibly cool the conductive metal sheet. This active cooling method can promptly remove the heat generated by the conductive metal sheet, ensuring that the temperature of the electrical connection device remains within a safe range under long-term, high-current testing conditions, significantly improving the safety and reliability of the testing process. Attached Figure Description

[0016] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein: Figure 1 This is an assembly diagram of a specific embodiment of the electrical connection device for testing battery packs according to the present invention; Figure 2 This is a top view of a specific embodiment of the electrical connection device for testing battery packs according to the present invention; Figure 3 An exploded view of a specific embodiment of the electrical connection device for testing battery packs according to the present invention; Figure 4 This is a cross-sectional view of a specific embodiment of the electrical connection device for testing battery packs according to the present invention; Figure 5 This is a cross-sectional view of a specific embodiment of the electrical connection device for testing battery packs according to the present invention; Figure 6 This is a system configuration diagram of a specific embodiment of the battery pack testing system of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Example 1 like Figures 1 to 5The diagram illustrates a specific embodiment of the electrical connection device 100 for battery pack testing provided by the present invention. This electrical connection device 100 is used to establish an electrical connection between the battery pack 200 and the battery pack testing equipment 300 during the battery pack 200 testing process.

[0024] like Figure 3 As shown, the electrical connection device 100 includes a housing 1, a pair of conductive metal plates 3, at least a pair of conductive cables 30, at least one temperature sensing part 4, and a cooling pipe connector 5. The housing 1 is constructed as the external protective structure of the electrical connection device 100, and has an internal cavity for accommodating the electrical connectors. A socket 11 is provided on the first end face of the housing 1 for the insertion and engagement of the plug 210 of the battery pack 200 to achieve mechanical insertion and electrical connection between the electrical connection device 100 and the battery pack 200. A cable connector 20 is provided on the second end face of the housing 1 for electrical connection with the battery pack testing equipment 300, and the cable connector 20 is used to connect the electrical connection device 100 to the external battery pack testing equipment 300.

[0025] A pair of conductive metal sheets 3 are installed inside the housing 1 and extend along a first direction. The conductive metal sheets 3 are used to transmit current between the plug 210 of the battery pack 200 and the battery pack testing equipment 300. The first end of the conductive metal sheet 3 extends to the socket 11 of the housing 1. When the plug 210 of the battery pack 200 is inserted into the socket 11, the electrodes inside the plug 210 form electrical contact with the first end of the conductive metal sheet 3. The conductive metal sheet 3 is made of a highly conductive metal material, such as copper or a copper alloy, to reduce contact resistance and conduction resistance, and reduce heat generation during high current transmission.

[0026] At least one pair of conductive cables 30 are electrically connected to a conductive metal sheet 3, with the other end of the conductive cables 30 extending to a cable connector 20 on the housing 1. The conductive cables 30 are used to transmit the current received by the conductive metal sheet 3 to the cable connector 20, and then output it to the battery pack testing equipment 300 through the cable connector 20. Specifically, a reliable electrical connection is achieved between the conductive metal sheet 3 and the conductive cables 30 via a terminal block 31. The terminal block 31 can be a crimp terminal, a solder terminal, or a bolt-fastened terminal. One end of the terminal block 31 is fixedly connected to the conductive metal sheet 3 (e.g., by welding or bolting), and the other end is crimped or soldered to the conductor portion of the conductive cable 30. The terminal block 31 achieves a reliable electrical connection between the conductive cables 30 and the conductive metal sheet 3, with low contact resistance, meeting the requirements for high current transmission. Simultaneously, the terminal block 31 allows for detachable connection between the conductive cables 30 and the conductive metal sheet 3, facilitating subsequent maintenance and replacement. More specifically, as... Figure 4As shown, for each conductive metal sheet 3, two sets of conductive cables 30 are connected to it through a terminal 31. This increases the current passing through the conductive metal sheet 3, meeting the requirements of high-voltage and high-current testing systems.

[0027] At least one temperature sensing unit 4 is mounted on the conductive metal sheet 3 to detect the temperature of the conductive metal sheet 3. The temperature sensing unit 4 can be a thermocouple, a thermistor (such as an NTC thermistor), or an integrated temperature sensor element, with its sensing end directly contacting the surface of the conductive metal sheet 3 to acquire the temperature data of the conductive metal sheet 3 in real time during operation. By directly mounting the temperature sensing unit 4 on the conductive metal sheet 3, the actual temperature rise of the conductive metal sheet 3 during high current transmission can be accurately reflected, providing a precise temperature signal for subsequent cooling control.

[0028] A cooling pipe connector 5 is installed on the second end face of the housing 1 for connection with a cooling pipe. One end of the cooling pipe connector 5 extends into the housing 1, and the other end extends to the outside of the housing 1 for connection to an external cooling pipe. A cooling medium (e.g., cooling gas) can be introduced into the housing 1 through the cooling pipe connector 5 to cool and reduce the temperature of heat-generating components such as the conductive metal sheet 3 inside the housing 1.

[0029] In this embodiment, when the electrical connection device 100 is in operation, the plug 210 of the battery pack 200 is inserted into the socket 11 of the housing 1, and the electrodes of the plug 210 make electrical contact with the first end of the conductive metal sheet 3. The current of the battery pack 200 is transmitted to the battery pack testing equipment 300 through the conductive metal sheet 3, the conductive cable 30, and the cable connector 20 to realize the charge and discharge test of the battery pack 200. During the test, the temperature detection unit 4 monitors the temperature of the conductive metal sheet 3 in real time. When the temperature of the conductive metal sheet 3 exceeds the preset upper temperature limit, the external cooling system introduces a cooling medium into the housing 1 through the cooling pipe connector 5 to forcibly cool the conductive metal sheet 3, thereby ensuring the safe use of the electrical connection device 100 during the test and preventing equipment damage or safety accidents due to overheating.

[0030] like Figure 3As shown, the electrical connection device 100 also includes a switch probe 6 installed within the housing 1. The switch probe 6 extends along a first direction and into the socket 11, and remains in a normally open state. When the electrical connection device 100 is electrically connected to the plug 210 of the battery pack 200, the plug 210 of the battery pack 200 triggers the switch probe 6 to turn on. Specifically, the switch probe 6 can be configured as a micro-switch probe or a contact probe with a resilient telescopic end. When the plug 210 is not inserted or is not fully inserted, the contacts of the switch probe 6 are in an open state. When the plug 210 is inserted into the socket 11 to a predetermined depth along the first direction, the end face or a specific part of the plug 210 presses against the telescopic end of the switch probe 6, pushing the contacts of the switch probe 6 to close, thereby outputting an electrical signal indicating "connection in place". The switch probe 6 can only conduct after being fully inserted, which can serve as a start condition for subsequent testing procedures or a safety interlock signal, ensuring that testing only begins when the electrical connection is reliable, effectively improving the safety of the testing process.

[0031] like Figure 1 As shown, the electrical connection device 100 also includes an indicator light 7. The indicator light 7 is mounted on the outside of the housing 1 and connected to the switch probe 6 in the same circuit, used to indicate the switching status of the switch probe 6. The indicator light 7 can be an LED indicator, connected in series with the switch probe 6 in the same signal circuit. When the switch probe 6 is in the off state, the indicator light 7 is off; when the switch probe 6 is triggered and connected by the plug 210, the indicator light 7 is on. By observing the on and off state of the indicator light 7, the operator can visually determine whether the plug 210 of the electrical connection device 100 and the battery pack 200 is properly connected. This visual indication method facilitates quick confirmation of the connection status by the operator on-site, avoiding test abnormalities or safety accidents caused by misjudgment of the connection status.

[0032] Specifically, the electrical connection device 100 further includes an insulating connection plate 2 for positioning and supporting the conductive metal sheet 3 and the switch probe 6. The insulating connection plate 2 is made of insulating materials such as engineering plastics (e.g., polycarbonate, nylon) or ceramics. It is fixedly connected inside the housing 1. A set of spaced-apart first connection through holes 21 are formed on the insulating connection plate 2. A pair of conductive metal sheets 3 are respectively inserted into two of the first connection through holes 21, and the insulating connection plate 2 maintains the distance between them to prevent short circuits between the conductive metal sheets 3. The insulating connection plate 2 also includes a second connection through hole 22, through which the switch probe 6 is inserted and extends into the socket 11. The insulating connection plate 2, on the one hand, can precisely limit and guide the conductive metal sheet 3 and the switch probe 6, ensuring that each component maintains the correct position and orientation during insertion; on the other hand, it insulates and isolates the pair of conductive metal sheets 3 and the conductive metal sheet 3 from the switch probe 6, effectively avoiding the risk of electrical short circuits.

[0033] like Figure 2 and Figure 3 As shown, the housing 1 includes a main housing 12, a connector end plate 16, a bottom connecting housing 13, an upper connecting housing 14, and a cover plate 15.

[0034] The main housing 12 is the main skeleton structure of the electrical connection device 100, and has a cavity extending along the first direction. The internal cavity is used to accommodate components such as conductive metal sheet 3 and conductive cable 30. The insulating connecting plate 2 is connected to the opening on one side of the main housing (12), and the top surface of the main housing (12) away from the opening of the insulating connecting plate 2 has a wire-passing opening 121.

[0035] The connector end plate 16 is used to mate with the plug 210 of the battery pack 200. It is connected to the open end of the main housing 12 near the insulating connecting plate 2. Its outer end face is provided with a guide slot 161 adapted to the plug 210 of the battery pack 200. The inner area of ​​the guide slot 161 is provided with a socket 11. The guide slot 161 guides and positions the plug 210 during insertion, ensuring that the plug 210 can be accurately aligned with the socket 11 and inserted.

[0036] The bottom connecting shell 13 is connected to the open end of the main housing 12 away from the insulating connecting plate 2, and has sidewalls extending in a second direction. The upper connecting shell 14 is connected to the bottom connecting shell 13 and has an open cavity extending in the second direction, communicating with the wiring opening 121. The bottom connecting shell 13 and the upper connecting shell 14 together form a wiring chamber located at the rear of the main housing 12, which communicates with the cavity of the main housing 12 through the wiring opening 121. A cover plate 15 is connected to the upper connecting shell 14 to cover its open cavity, and the conductive cable 30 and the cooling pipe connector 5 pass through the cover plate 15.

[0037] The modular housing structure allows for the separate manufacturing and assembly of each component, reducing manufacturing difficulty and cost. Simultaneously, the wiring opening 121 and the wiring chamber formed by the bottom connecting shell 13 and the upper connecting shell 14 provide an independent channel for the conductive cable 30, ensuring good isolation between the high-voltage lines and other components within the housing 1, thus improving electrical safety. The cover plate 15 facilitates opening the wiring chamber for operation during assembly and maintenance.

[0038] like Figure 2 , Figure 3As shown, the cover plate 15 is also equipped with an adapter socket 8. The adapter socket 8 contains several probes 81, which are suitable for electrical connection with the cables of the temperature detection unit 4, indicator light 7, and switch probe 6. The adapter socket 8 is fixedly installed on the cover plate 15, and the several probes 81 integrated inside it are respectively electrically connected to the signal lines of the temperature detection unit 4, the leads of the indicator light 7, and the signal lines of the switch probe 6. The outer end of the adapter socket 8 is equipped with a standard plug-in interface for quick connection with external control cables. By setting the adapter socket 8, multiple signal cables inside the electrical connection device 100 are centrally connected to a single standard interface, avoiding the cumbersome wiring method of multiple cables being led out separately from the housing 1. This not only simplifies the cable layout inside the electrical connection device 100, making the internal structure more neat and orderly, but also facilitates quick connection and disconnection between the electrical connection device 100 and the external control system, improving testing efficiency. Simultaneously, spatially separating the signal cables from the conductive cables 30 also helps reduce electromagnetic interference from strong electrical signals to weak electrical signals.

[0039] like Figure 5 As shown, the outer surface of the connector end plate 16 is provided with an annular protrusion structure. The annular protrusion structure protrudes outward from the outer end face of the connector end plate 16 along a first direction, and its internal space forms a guide slot 161. The inner wall contour of the annular protrusion structure is adapted to the outer wall contour of the plug 210 of the battery pack 200. When the plug 210 is inserted, the inner wall of the annular protrusion structure provides circumferential limiting and guiding effect on the outer wall of the plug 210, ensuring that the plug 210 is inserted into the socket 11 in the correct posture and angle. The design of the annular protrusion structure extends the guiding length of the guide slot 161, improves the smoothness and accuracy of the insertion process, and also provides a certain degree of protection for the end of the conductive metal sheet 3 in the socket 11, preventing external foreign objects from directly contacting the conductive metal sheet 3.

[0040] like Figure 5 As shown, the electrical connection device 100 also includes an anti-disengagement limiting component 9 for engaging with the plug 210 of the battery pack 200. The anti-disengagement limiting component 9 includes an adjustable latch 91, an operating part 92, and a reset member.

[0041] The adjustable hook 91 is pivotally connected to the outside of the housing 1, and has a locking part on one end. The locking part is used to engage with the corresponding locking plate 211 on the plug 210 after the electrical connection device 100 and the plug 210 of the battery pack 200 are inserted into place, so as to prevent the plug 210 from coming out of the socket 11.

[0042] The operating unit 92 is connected to the side of the adjustable hook 91 away from the engaging part, and can operably drive the adjustable hook 91 to pivot around the pivot axis to switch the position of the adjustable hook 91. By pressing or moving the operating unit 92, the operator can rotate the adjustable hook 91 around the pivot axis, thereby causing the engaging part to disengage from the plug 210, thus unlocking and separating the electrical connection device 100 from the plug 210.

[0043] The reset element acts on the adjustable latch 91, providing a force to maintain the latched position. The reset element can be a torsion spring or a compression spring, with one end fixed to the housing 1 and the other end abutting against the adjustable latch 91. In its natural state, the reset element keeps the adjustable latch 91 in the latched position. When the plug 210 is inserted, the outer wall of the plug 210 pushes the latching part outward against the force of the reset element. After the plug 210 is fully inserted, the reset element drives the adjustable latch 91 to reset, and the latching part automatically engages in the slot of the plug 210, achieving automatic locking.

[0044] The anti-detachment limiting component 9 effectively prevents the plug 210 of the electrical connection device 100 and the battery pack 200 from accidentally detaching during the test due to vibration, pulling or other reasons, ensuring the continuous reliability of the electrical connection during the test and avoiding the loss of test data or equipment damage caused by connection interruption.

[0045] like Figure 5 As shown, a pivot seat 162 is provided on the upper side of the annular protrusion structure of the connector end plate 16. The pivot seat 162 is located on the upper side of the annular protrusion structure, providing stable pivot support for the adjustable hook 91. The adjustable hook 91 is L-shaped, and its bent area is pivotally connected to the pivot seat 162. One side arm of the adjustable hook 91 extends along a first direction and forms a locking part at the end, while the other side arm extends along a second direction and connects to the operating part 92. The locking part extends along the first direction, and when the adjustable hook 91 is in the locking position, the locking part extends to the outer area of ​​the annular protrusion structure, forming a locking engagement with the locking platform of the plug 210. The operating part 92 extends along the second direction to the outer side of the housing 1, facilitating operation by the operator from the outside. For example, when the operator presses down on the operating part 92, the adjustable hook 91 rotates around the pivot seat 162, the locking part lifts up, disengaging from the locking engagement with the plug 210, thereby allowing the plug 210 to be pulled out. After the operating unit 92 is released, the reset element drives the adjustable latch 91 to return to the latched position. This arrangement makes the unlocking operation ergonomic, convenient, and effortless.

[0046] Example 2 This embodiment provides a battery pack testing system, such as Figure 6As shown, the device includes a battery pack 200, a battery pack testing device 300, and an electrical connection device 100 according to any of the above embodiments. The electrical connection device 100 is adapted to be plugged into the plug 210 of the battery pack 200 to realize the electrical connection between the battery pack 200 and the battery pack testing device 300.

[0047] During the test, the socket 11 of the electrical connection device 100 is first aligned with the plug 210 of the battery pack 200, and the plug 210 is inserted into the socket 11 until it is fully connected. At this time, the conductive metal plate 3 of the electrical connection device 100 forms electrical contact with the electrodes of the plug 210, and the current of the battery pack 200 is transmitted to the battery pack testing equipment 300 through the electrical connection device 100. The battery pack testing equipment 300 performs charge and discharge tests on the battery pack 200 according to a preset test program and collects relevant test data.

[0048] Since the electrical connection device 100 integrates the temperature detection unit 4 and the cooling pipe connector 5, it can monitor the temperature of the conductive metal sheet 3 in real time during the test, and introduce cooling medium through the cooling pipe connector 5 for forced cooling when the temperature exceeds the limit, thereby ensuring the safe operation of the entire test system under high temperature and high current conditions.

[0049] like Figure 6 As shown, the battery pack testing system also includes an air-cooling system 400 and a control unit 500. The air-cooling system 400 includes an air source 410 and a solenoid valve 420 installed on the cooling pipes, and the cooling system is connected to the electrical connection device 100 through the cooling pipes. The control unit 500 controls the on / off state of the cooling pipes according to the detection signal from the temperature detection unit 4.

[0050] Specifically, the gas source 410 provides compressed cooling gas (e.g., compressed air or cooling nitrogen), and the solenoid valve 420 is located on the cooling pipeline to control the opening and closing of the cooling pipeline. One end of the cooling pipeline is connected to the gas source 410, and the other end is connected to the cooling pipe connector 5 of the electrical connection device 100. The control unit 500 establishes a signal connection with the temperature detection unit 4 and the solenoid valve 420. During the test, the temperature detection unit 4 transmits the temperature signal of the conductive metal sheet 3 to the control unit 500 in real time. The control unit 500 compares the received temperature signal with a preset temperature threshold. When the temperature of the conductive metal sheet 3 exceeds the preset upper temperature limit, the control unit 500 sends an opening command to the solenoid valve 420, the solenoid valve 420 opens, and the cooling gas provided by the gas source 410 enters the interior of the housing 1 through the cooling pipeline and the cooling pipe connector 5 to cool the conductive metal sheet 3. When the temperature of the conductive metal sheet 3 drops back to the preset safe temperature range, the control unit 500 sends a closing command to the solenoid valve 420, the solenoid valve 420 closes, and the supply of cooling gas stops.

[0051] Through the coordinated control of the control unit 500 and the air-cooling system 400, automated temperature management of the electrical connection device 100 is achieved. This closed-loop temperature control method can activate cooling as needed based on the actual temperature of the conductive metal sheet 3, ensuring effective heat dissipation under high-temperature conditions while avoiding continuous waste of cooling medium, thus improving cooling efficiency and economy. At the same time, automated temperature control reduces the need for manual intervention and lowers the workload of operators.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A battery pack testing electrical connection device, characterized in that, include: The housing (1) has an opening (11) on its first end face and a cable connector (20) on its second end face for electrical connection with the battery pack testing equipment 300. A pair of conductive metal sheets (3) are installed inside the housing (1) and extend along a first direction, with the first side end of the conductive metal sheets (3) extending to the socket (11) of the housing (1); At least one pair of conductive cables (30) are electrically connected to the conductive metal sheet (3) and the other end extends to the cable connector (20) of the housing (1); At least one temperature detection unit (4) is installed on the conductive metal sheet (3) for detecting the temperature of the conductive metal sheet (3); Cooling pipe connector (5) is installed on the second end face of the housing (1) for connecting to the cooling pipe.

2. The electrical connection device for testing a battery pack according to claim 1, characterized in that, It also includes a switch probe (6) installed inside the housing (1) and an indicator light (7) installed on the outside of the housing. The switch probe (6) extends along a first direction and extends into the socket (11). The switch probe (6) is kept in a normally open state. When the electrical connection device is electrically connected to the plug (210) of the battery pack (200), the battery pack (200) triggers the switch probe (6) to turn on. The indicator light (7) is connected to the switch probe (6) on the same circuit and is used to indicate the switching state of the switch probe (6).

3. The electrical connection device for battery pack testing according to claim 2, characterized in that, It also includes an insulating connecting plate (2), which is installed inside the housing (1). A set of first connecting through holes (21) are opened on the insulating connecting plate (2) at intervals. The conductive metal sheet (3) passes through it and extends into the socket (11). The insulating connecting plate (2) also includes a second connecting through hole (22), on which the switch probe (6) passes through and extends into the socket (11).

4. The electrical connection device for testing a battery pack according to claim 1, characterized in that, The housing (1) includes: The main housing (12) has a cavity extending along a first direction with open ends. The insulating connecting plate (2) is connected to one open end of the main housing (12). A wire-passing opening (121) is provided on the top surface of the main housing (12) away from the open end of the insulating connecting plate (2). The connector end plate (16) is connected to the open end of the main housing (12) near the insulating connecting plate (2), and its outer end face is provided with a guide slot (161) adapted to the plug (210) of the battery pack (200). The inner area of ​​the guide slot (161) is provided with the socket (11). Bottom connecting shell (13), connected to the open end of the main shell (12) away from the insulating connecting plate (2), has sidewalls extending in a second direction; The upper connecting shell (14) is connected to the bottom connecting shell (13) and has an open mouth extending in the second direction, which communicates with the threading opening (121); A cover plate (15) is connected to the upper connecting shell (14) to cover its opening body, and the conductive cable (30) and the cooling pipe connector (5) are passed through the cover plate (15).

5. The electrical connection device for testing a battery pack according to claim 4, characterized in that, The cover plate (15) is also provided with an adapter socket (8), which contains several probes (81) suitable for electrical connection with the cables of the temperature detection unit (4), indicator light (7) and switch probe (6).

6. The electrical connection device for testing a battery pack according to claim 4, characterized in that, The outer side of the connector end plate (16) is provided with an annular protrusion structure, and the guide slot (161) is formed in the annular protrusion structure.

7. The electrical connection device for testing a battery pack according to claim 4, characterized in that, It also includes an anti-disengagement limiting assembly (9) for snap-fit ​​connection with the plug (210) of the battery pack (200), which includes: An adjustable hook (91) is pivotally connected to the outside of the housing (1), and has a snap-fit ​​portion at one end; An operating unit (92) is connected to the side of the adjustable hook (91) away from the locking part and can operably drive the adjustable hook (91) to pivot about the pivot axis to switch the position of the adjustable hook (91); The reset element acts on the adjustable latch (91) and is adapted to provide a force to the adjustable latch (91) to maintain the latching position.

8. A battery pack testing electrical connection device according to claim 4, characterized in that, The annular protrusion structure of the connector end plate (16) is provided with a pivot seat (162) on the upper side. The adjustable hook (91) is L-shaped and its bending area is pivotally connected to the pivot seat (162). One arm extends along the first direction and forms the snap-fit ​​part at the end. The other arm extends along the second direction and is connected to the operating part (92).

9. A battery pack testing system, characterized in that, include The battery pack (200), the battery pack testing equipment (300), and the electrical connection device (100) according to any one of claims 1-8; the electrical connection device (100) is adapted to be plugged into the plug (210) of the battery pack (200) to realize the electrical connection between the battery pack (200) and the battery pack testing equipment (300).

10. A battery pack testing system according to claim 9, characterized in that, It also includes an air-cooling system (400) and a control unit (500). The air-cooling system (400) includes an air source (410) and a solenoid valve (420) installed on the cooling pipe. The cooling system is connected to the electrical connection device (100) through the cooling pipe. The control unit (500) controls the opening and closing of the cooling pipe according to the detection signal of the temperature detection unit (4).

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